[BSP] Add QEMU/VExpress-A9 bsp.

bsp/qemu-vexpress-a9/.config

+#
+# Automatically generated file; DO NOT EDIT.
+# RT-Thread Project Configuration
+#
+
+#
+# RT-Thread Kernel
+#
+CONFIG_RT_NAME_MAX=8
+CONFIG_RT_ALIGN_SIZE=4
+CONFIG_RT_THREAD_PRIORITY_MAX=32
+CONFIG_RT_TICK_PER_SECOND=100
+CONFIG_RT_DEBUG=y
+CONFIG_RT_USING_OVERFLOW_CHECK=y
+# CONFIG_RT_DEBUG_INIT is not set
+# CONFIG_RT_DEBUG_THREAD is not set
+CONFIG_RT_USING_HOOK=y
+# CONFIG_RT_USING_TIMER_SOFT is not set
+
+#
+# Inter-Thread communication
+#
+CONFIG_RT_USING_SEMAPHORE=y
+CONFIG_RT_USING_MUTEX=y
+CONFIG_RT_USING_EVENT=y
+CONFIG_RT_USING_MAILBOX=y
+CONFIG_RT_USING_MESSAGEQUEUE=y
+
+#
+# Memory Management
+#
+CONFIG_RT_USING_MEMPOOL=y
+CONFIG_RT_USING_MEMHEAP=y
+CONFIG_RT_USING_HEAP=y
+CONFIG_RT_USING_SMALL_MEM=y
+# CONFIG_RT_USING_SLAB is not set
+
+#
+# Kernel Device Object
+#
+CONFIG_RT_USING_DEVICE=y
+CONFIG_RT_USING_CONSOLE=y
+CONFIG_RT_CONSOLEBUF_SIZE=128
+CONFIG_RT_CONSOLE_DEVICE_NAME="uart0"
+# CONFIG_RT_USING_MODULE is not set
+
+#
+# RT-Thread Components
+#
+CONFIG_RT_USING_COMPONENTS_INIT=y
+CONFIG_RT_USING_USER_MAIN=y
+
+#
+# C++ features
+#
+# CONFIG_RT_USING_CPLUSPLUS is not set
+
+#
+# Command shell
+#
+CONFIG_RT_USING_FINSH=y
+CONFIG_FINSH_USING_SYMTAB=y
+CONFIG_FINSH_USING_DESCRIPTION=y
+CONFIG_FINSH_THREAD_STACK_SIZE=4096
+# CONFIG_FINSH_USING_AUTH is not set
+CONFIG_FINSH_DEFAULT_PASSWORD="rtthread"
+CONFIG_FINSH_USING_MSH=y
+CONFIG_FINSH_USING_MSH_DEFAULT=y
+# CONFIG_FINSH_USING_MSH_ONLY is not set
+
+#
+# Device virtual file system
+#
+CONFIG_RT_USING_DFS=y
+CONFIG_DFS_USING_WORKDIR=y
+CONFIG_DFS_FILESYSTEMS_MAX=2
+CONFIG_DFS_FD_MAX=4
+CONFIG_RT_USING_DFS_ELMFAT=y
+CONFIG_RT_DFS_ELM_CODE_PAGE=437
+CONFIG_RT_DFS_ELM_MAX_LFN=256
+CONFIG_RT_DFS_ELM_DRIVES=2
+CONFIG_RT_DFS_ELM_MAX_SECTOR_SIZE=512
+# CONFIG_RT_DFS_ELM_USE_ERASE is not set
+CONFIG_RT_DFS_ELM_REENTRANT=y
+CONFIG_RT_USING_DFS_DEVFS=y
+# CONFIG_RT_USING_DFS_NET is not set
+# CONFIG_RT_USING_DFS_NFS is not set
+
+#
+# Device Drivers
+#
+CONFIG_RT_USING_DEVICE_IPC=y
+CONFIG_RT_USING_SERIAL=y
+# CONFIG_RT_USING_CAN is not set
+# CONFIG_RT_USING_HWTIMER is not set
+# CONFIG_RT_USING_I2C is not set
+CONFIG_RT_USING_PIN=y
+# CONFIG_RT_USING_MTD_NOR is not set
+# CONFIG_RT_USING_MTD_NAND is not set
+# CONFIG_RT_USING_RTC is not set
+# CONFIG_RT_USING_SDIO is not set
+# CONFIG_RT_USING_SPI is not set
+# CONFIG_RT_USING_WDT is not set
+# CONFIG_RT_USING_USB_HOST is not set
+# CONFIG_RT_USING_USB_DEVICE is not set
+
+#
+# libc
+#
+CONFIG_RT_USING_LIBC=y
+CONFIG_RT_USING_PTHREADS=y
+
+#
+# Network stack
+#
+
+#
+# light weight TCP/IP stack
+#
+# CONFIG_RT_USING_LWIP is not set
+
+#
+# Modbus master and slave stack
+#
+# CONFIG_RT_USING_MODBUS is not set
+
+#
+# RT-Thread online packages
+#
+
+#
+# IoT - internet of things
+#
+
+#
+# language packages
+#
+
+#
+# miscellaneous packages
+#
+CONFIG_PKG_USING_HELLO=y
+CONFIG_PKG_HELLO_PATH="/packages/misc/hello"
+CONFIG_PKG_HELLO_VER="v1.0.0"
+
+#
+# multimedia packages
+#
+
+#
+# security packages
+#
+
+#
+# system packages
+#
+# CONFIG_PKG_USING_CMBACKTRACE is not set
+CONFIG_RT_USING_UART0=y
+CONFIG_RT_USING_UART1=y

bsp/qemu-vexpress-a9/Kconfig

+mainmenu "RT-Thread Project Configuration"
+
+config $BSP_DIR
+    string
+    option env="BSP_ROOT"
+    default "."
+
+config $RTT_DIR
+    string
+    option env="RTT_ROOT"
+    default "../.."
+
+config $PKGS_DIR
+    string
+    option env="PKGS_ROOT"
+    default "packages"
+
+source "$RTT_DIR/KConfig"
+source "$PKGS_DIR/KConfig"
+source "$BSP_DIR/drivers/Kconfig"

bsp/qemu-vexpress-a9/README.md

+RT-Thread for QEMU/vexpress-a9
+
+The shell of RT-Thread is on serial0. 

bsp/qemu-vexpress-a9/SConscript

+# for module compiling
+import os
+Import('RTT_ROOT')
+
+cwd = str(Dir('#'))
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+
+Return('objs')

bsp/qemu-vexpress-a9/SConstruct

+import os
+import sys
+import rtconfig
+
+if os.getenv('RTT_ROOT'):
+    RTT_ROOT = os.getenv('RTT_ROOT')
+else:
+    RTT_ROOT = os.path.normpath(os.getcwd() + '/../..')
+
+sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
+from building import *
+
+TARGET = 'rtthread.' + rtconfig.TARGET_EXT
+
+env = Environment(tools = ['mingw'],
+    AS   = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+    CC   = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+    CXX  = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
+    AR   = rtconfig.AR, ARFLAGS = '-rc',
+    LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+
+Export('RTT_ROOT')
+Export('rtconfig')
+
+# prepare building environment
+objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=True)
+
+# make a building
+DoBuilding(TARGET, objs)

bsp/qemu-vexpress-a9/applications/SConscript

+Import('RTT_ROOT')
+Import('rtconfig')
+from building import *
+
+cwd     = os.path.join(str(Dir('#')), 'applications')
+src	= Glob('*.c')
+CPPPATH = [cwd, str(Dir('#'))]
+
+group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

bsp/qemu-vexpress-a9/applications/main.c

+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void)
+{
+    printf("hello rt-thread\n");
+
+    return 0;
+}
+

bsp/qemu-vexpress-a9/cpu/SConscript

+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src	= Glob('*.c')
+CPPPATH = [cwd]
+
+if rtconfig.PLATFORM == 'iar':
+        src += Glob('*_iar.S')
+elif rtconfig.PLATFORM == 'gcc':
+        src += Glob('*_gcc.S')
+elif rtconfig.PLATFORM == 'armcc':
+        src += Glob('*_rvds.S')
+
+group = DefineGroup('CPU', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

bsp/qemu-vexpress-a9/cpu/armv7.h

+#ifndef __ARMV7_H__
+#define __ARMV7_H__
+
+/* the exception stack without VFP registers */
+struct rt_hw_exp_stack
+{
+	unsigned long r0;
+	unsigned long r1;
+	unsigned long r2;
+	unsigned long r3;
+	unsigned long r4;
+	unsigned long r5;
+	unsigned long r6;
+	unsigned long r7;
+	unsigned long r8;
+	unsigned long r9;
+	unsigned long r10;
+	unsigned long fp;
+	unsigned long ip;
+	unsigned long sp;
+	unsigned long lr;
+	unsigned long pc;
+	unsigned long cpsr;
+};
+
+struct rt_hw_stack
+{
+	unsigned long cpsr;
+	unsigned long r0;
+	unsigned long r1;
+	unsigned long r2;
+	unsigned long r3;
+	unsigned long r4;
+	unsigned long r5;
+	unsigned long r6;
+	unsigned long r7;
+	unsigned long r8;
+	unsigned long r9;
+	unsigned long r10;
+	unsigned long fp;
+	unsigned long ip;
+	unsigned long lr;
+	unsigned long pc;
+};
+
+#define USERMODE    0x10
+#define FIQMODE     0x11
+#define IRQMODE     0x12
+#define SVCMODE     0x13
+#define MONITORMODE 0x16
+#define ABORTMODE   0x17
+#define HYPMODE     0x1b
+#define UNDEFMODE   0x1b
+#define MODEMASK    0x1f
+#define NOINT       0xc0
+
+#define T_Bit       (1<<5)
+#define F_Bit       (1<<6)
+#define I_Bit       (1<<7)
+#define A_Bit       (1<<8)
+#define E_Bit       (1<<9)
+#define J_Bit       (1<<24)
+
+#endif

bsp/qemu-vexpress-a9/cpu/context_gcc.S

+/*
+ * File      : context.S
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-05     Bernard      the first version
+ */
+
+.section .text, "ax"
+/*
+ * rt_base_t rt_hw_interrupt_disable();
+ */
+.globl rt_hw_interrupt_disable
+rt_hw_interrupt_disable:
+    mrs r0, cpsr
+    cpsid i
+    bx  lr
+
+/*
+ * void rt_hw_interrupt_enable(rt_base_t level);
+ */
+.globl rt_hw_interrupt_enable
+rt_hw_interrupt_enable:
+    msr cpsr, r0
+    bx  lr
+
+/*
+ * void rt_hw_context_switch_to(rt_uint32 to);
+ * r0 --> to
+ */
+.globl rt_hw_context_switch_to
+rt_hw_context_switch_to:
+    ldr sp, [r0]            @ get new task stack pointer
+
+    ldmfd sp!, {r4}         @ pop new task spsr
+    msr spsr_cxsf, r4
+
+    ldmfd sp!, {r0-r12, lr, pc}^   @ pop new task r0-r12, lr & pc
+
+.section .bss.share.isr
+_guest_switch_lvl:
+    .word 0
+
+.section .text.isr, "ax"
+/*
+ * void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
+ * r0 --> from
+ * r1 --> to
+ */
+.globl rt_hw_context_switch
+rt_hw_context_switch:
+    stmfd   sp!, {lr}       @ push pc (lr should be pushed in place of PC)
+    stmfd   sp!, {r0-r12, lr}   @ push lr & register file
+
+    mrs r4, cpsr
+    tst lr, #0x01
+    orrne r4, r4, #0x20     @ it's thumb code
+
+    stmfd sp!, {r4}         @ push cpsr
+
+    str sp, [r0]            @ store sp in preempted tasks TCB
+    ldr sp, [r1]            @ get new task stack pointer
+
+    ldmfd sp!, {r4}         @ pop new task cpsr to spsr
+    msr spsr_cxsf, r4
+    ldmfd sp!, {r0-r12, lr, pc}^  @ pop new task r0-r12, lr & pc, copy spsr to cpsr
+
+/*
+ * void rt_hw_context_switch_interrupt(rt_uint32 from, rt_uint32 to);
+ */
+.globl rt_thread_switch_interrupt_flag
+.globl rt_interrupt_from_thread
+.globl rt_interrupt_to_thread
+.globl rt_hw_context_switch_interrupt
+rt_hw_context_switch_interrupt:
+    ldr r2, =rt_thread_switch_interrupt_flag
+    ldr r3, [r2]
+    cmp r3, #1
+    beq _reswitch
+    ldr ip, =rt_interrupt_from_thread   @ set rt_interrupt_from_thread
+    mov r3, #1              @ set rt_thread_switch_interrupt_flag to 1
+    str r0, [ip]
+    str r3, [r2]
+_reswitch:
+    ldr r2, =rt_interrupt_to_thread     @ set rt_interrupt_to_thread
+    str r1, [r2]
+    bx  lr

bsp/qemu-vexpress-a9/cpu/cp15.h

+#ifndef __CP15_H__
+#define __CP15_H__
+
+unsigned long rt_cpu_get_smp_id(void);
+
+void rt_cpu_mmu_disable(void);
+void rt_cpu_mmu_enable(void);
+void rt_cpu_tlb_set(volatile unsigned long*);
+
+void rt_cpu_vector_set_base(unsigned int addr);
+
+#endif

bsp/qemu-vexpress-a9/cpu/cp15_gcc.S

+/*
+ * File      : cp15_gcc.S
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013, RT-Thread Development Team
+ * http://www.rt-thread.org
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-05     Bernard      the first version
+ */
+
+.globl rt_cpu_get_smp_id
+rt_cpu_get_smp_id:
+    mrc     p15, #0, r0, c0, c0, #5
+    bx      lr
+
+.globl rt_cpu_vector_set_base
+rt_cpu_vector_set_base:
+    mcr     p15, #0, r0, c12, c0, #0
+    dsb
+    bx      lr
+
+.globl rt_hw_cpu_dcache_enable
+rt_hw_cpu_dcache_enable:
+    mrc     p15, #0, r0, c1, c0, #0
+    orr     r0,  r0, #0x00000004
+    mcr     p15, #0, r0, c1, c0, #0
+    bx      lr
+
+.globl rt_hw_cpu_icache_enable
+rt_hw_cpu_icache_enable:
+    mrc     p15, #0, r0, c1, c0, #0
+    orr     r0,  r0, #0x00001000
+    mcr     p15, #0, r0, c1, c0, #0
+    bx      lr
+
+_FLD_MAX_WAY:
+   .word  0x3ff
+_FLD_MAX_IDX:
+   .word  0x7ff
+
+.globl rt_cpu_dcache_clean_flush
+rt_cpu_dcache_clean_flush:
+    push    {r4-r11}
+    dmb
+    mrc     p15, #1, r0, c0, c0, #1  @ read clid register
+    ands    r3, r0, #0x7000000       @ get level of coherency
+    mov     r3, r3, lsr #23
+    beq     finished
+    mov     r10, #0
+loop1:
+    add     r2, r10, r10, lsr #1
+    mov     r1, r0, lsr r2
+    and     r1, r1, #7
+    cmp     r1, #2
+    blt     skip
+    mcr     p15, #2, r10, c0, c0, #0
+    isb
+    mrc     p15, #1, r1, c0, c0, #0
+    and     r2, r1, #7
+    add     r2, r2, #4
+    ldr     r4, _FLD_MAX_WAY
+    ands    r4, r4, r1, lsr #3
+    clz     r5, r4
+    ldr     r7, _FLD_MAX_IDX
+    ands    r7, r7, r1, lsr #13
+loop2:
+    mov     r9, r4
+loop3:
+    orr     r11, r10, r9, lsl r5
+    orr     r11, r11, r7, lsl r2
+    mcr     p15, #0, r11, c7, c14, #2
+    subs    r9, r9, #1
+    bge     loop3
+    subs    r7, r7, #1
+    bge     loop2
+skip:
+    add     r10, r10, #2
+    cmp     r3, r10
+    bgt     loop1
+
+finished:
+    dsb
+    isb
+    pop     {r4-r11}
+    bx      lr
+
+.globl rt_hw_cpu_dcache_disable
+rt_hw_cpu_dcache_disable:
+    push    {r4-r11, lr}
+    bl      rt_cpu_dcache_clean_flush
+    mrc     p15, #0, r0, c1, c0, #0
+    bic     r0,  r0, #0x00000004
+    mcr     p15, #0, r0, c1, c0, #0
+    pop     {r4-r11, lr}
+    bx      lr
+
+.globl rt_hw_cpu_icache_disable
+rt_hw_cpu_icache_disable:
+    mrc     p15, #0, r0, c1, c0, #0
+    bic     r0,  r0, #0x00001000
+    mcr     p15, #0, r0, c1, c0, #0
+    bx      lr
+
+.globl rt_cpu_mmu_disable
+rt_cpu_mmu_disable:
+    mcr     p15, #0, r0, c8, c7, #0    @ invalidate tlb
+    mrc     p15, #0, r0, c1, c0, #0
+    bic     r0, r0, #1
+    mcr     p15, #0, r0, c1, c0, #0    @ clear mmu bit
+    dsb
+    bx      lr
+
+.globl rt_cpu_mmu_enable
+rt_cpu_mmu_enable:
+    mrc     p15, #0, r0, c1, c0, #0
+    orr     r0, r0, #0x001
+    mcr     p15, #0, r0, c1, c0, #0    @ set mmu enable bit
+    dsb
+    bx      lr
+
+.globl rt_cpu_tlb_set
+rt_cpu_tlb_set:
+    mcr     p15, #0, r0, c2, c0, #0
+    dmb
+    bx      lr

bsp/qemu-vexpress-a9/cpu/cpu.c

+/*
+ * File      : cpu.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Develop Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-09-15     Bernard      first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <board.h>
+
+/**
+ * @addtogroup ARM CPU
+ */
+/*@{*/
+
+/** shutdown CPU */
+void rt_hw_cpu_shutdown()
+{
+	rt_uint32_t level;
+	rt_kprintf("shutdown...\n");
+
+	level = rt_hw_interrupt_disable();
+	while (level)
+	{
+		RT_ASSERT(0);
+	}
+}
+
+/*@}*/

bsp/qemu-vexpress-a9/cpu/gic.c

+/*
+ * File      : gic.c, ARM Generic Interrupt Controller
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013-2014, RT-Thread Develop Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-20     Bernard      first version
+ * 2014-04-03     Grissiom     many enhancements
+ */
+
+#include <rtthread.h>
+#include <board.h>
+
+#include "gic.h"
+#include "cp15.h"
+
+struct arm_gic
+{
+    rt_uint32_t offset;
+
+    rt_uint32_t dist_hw_base;
+    rt_uint32_t cpu_hw_base;
+};
+static struct arm_gic _gic_table[ARM_GIC_MAX_NR];
+
+#define GIC_CPU_CTRL(hw_base)               __REG32((hw_base) + 0x00)
+#define GIC_CPU_PRIMASK(hw_base)            __REG32((hw_base) + 0x04)
+#define GIC_CPU_BINPOINT(hw_base)           __REG32((hw_base) + 0x08)
+#define GIC_CPU_INTACK(hw_base)             __REG32((hw_base) + 0x0c)
+#define GIC_CPU_EOI(hw_base)                __REG32((hw_base) + 0x10)
+#define GIC_CPU_RUNNINGPRI(hw_base)         __REG32((hw_base) + 0x14)
+#define GIC_CPU_HIGHPRI(hw_base)            __REG32((hw_base) + 0x18)
+
+#define GIC_DIST_CTRL(hw_base)              __REG32((hw_base) + 0x000)
+#define GIC_DIST_TYPE(hw_base)              __REG32((hw_base) + 0x004)
+#define GIC_DIST_IGROUP(hw_base, n)         __REG32((hw_base) + 0x080 + ((n)/32) * 4)
+#define GIC_DIST_ENABLE_SET(hw_base, n)     __REG32((hw_base) + 0x100 + ((n)/32) * 4)
+#define GIC_DIST_ENABLE_CLEAR(hw_base, n)   __REG32((hw_base) + 0x180 + ((n)/32) * 4)
+#define GIC_DIST_PENDING_SET(hw_base, n)    __REG32((hw_base) + 0x200 + ((n)/32) * 4)
+#define GIC_DIST_PENDING_CLEAR(hw_base, n)  __REG32((hw_base) + 0x280 + ((n)/32) * 4)
+#define GIC_DIST_ACTIVE_SET(hw_base, n)     __REG32((hw_base) + 0x300 + ((n)/32) * 4)
+#define GIC_DIST_ACTIVE_CLEAR(hw_base, n)   __REG32((hw_base) + 0x380 + ((n)/32) * 4)
+#define GIC_DIST_PRI(hw_base, n)            __REG32((hw_base) + 0x400 +  ((n)/4) * 4)
+#define GIC_DIST_TARGET(hw_base, n)         __REG32((hw_base) + 0x800 +  ((n)/4) * 4)
+#define GIC_DIST_CONFIG(hw_base, n)         __REG32((hw_base) + 0xc00 + ((n)/16) * 4)
+#define GIC_DIST_SOFTINT(hw_base)           __REG32((hw_base) + 0xf00)
+#define GIC_DIST_CPENDSGI(hw_base, n)       __REG32((hw_base) + 0xf10 + ((n)/4) * 4)
+#define GIC_DIST_ICPIDR2(hw_base)           __REG32((hw_base) + 0xfe8)
+
+static unsigned int _gic_max_irq;
+
+int arm_gic_get_active_irq(rt_uint32_t index)
+{
+    int irq;
+
+    RT_ASSERT(index < ARM_GIC_MAX_NR);
+
+    irq = GIC_CPU_INTACK(_gic_table[index].cpu_hw_base);
+    irq += _gic_table[index].offset;
+    return irq;
+}
+
+void arm_gic_ack(rt_uint32_t index, int irq)
+{
+    rt_uint32_t mask = 1 << (irq % 32);
+
+    RT_ASSERT(index < ARM_GIC_MAX_NR);
+
+    irq = irq - _gic_table[index].offset;
+    RT_ASSERT(irq >= 0);
+
+    GIC_DIST_ENABLE_CLEAR(_gic_table[index].dist_hw_base, irq) = mask;
+    GIC_CPU_EOI(_gic_table[index].cpu_hw_base) = irq;
+    GIC_DIST_ENABLE_SET(_gic_table[index].dist_hw_base, irq) = mask;
+}
+
+void arm_gic_mask(rt_uint32_t index, int irq)
+{
+    rt_uint32_t mask = 1 << (irq % 32);
+
+    RT_ASSERT(index < ARM_GIC_MAX_NR);
+
+    irq = irq - _gic_table[index].offset;
+    RT_ASSERT(irq >= 0);
+
+    GIC_DIST_ENABLE_CLEAR(_gic_table[index].dist_hw_base, irq) = mask;
+}
+
+void arm_gic_clear_pending(rt_uint32_t index, int irq)
+{
+    rt_uint32_t mask = 1 << (irq % 32);
+
+    RT_ASSERT(index < ARM_GIC_MAX_NR);
+
+    irq = irq - _gic_table[index].offset;
+    RT_ASSERT(irq >= 0);
+
+    GIC_DIST_PENDING_CLEAR(_gic_table[index].dist_hw_base, irq) = mask;
+}
+
+void arm_gic_clear_active(rt_uint32_t index, int irq)
+{
+    rt_uint32_t mask = 1 << (irq % 32);
+
+    RT_ASSERT(index < ARM_GIC_MAX_NR);
+
+    irq = irq - _gic_table[index].offset;
+    RT_ASSERT(irq >= 0);
+
+    GIC_DIST_ACTIVE_CLEAR(_gic_table[index].dist_hw_base, irq) = mask;
+}
+
+void arm_gic_set_cpu(rt_uint32_t index, int irq, unsigned int cpumask)
+{
+    rt_uint32_t old_tgt;
+
+    RT_ASSERT(index < ARM_GIC_MAX_NR);
+
+    irq = irq - _gic_table[index].offset;
+    RT_ASSERT(irq >= 0);
+
+    old_tgt = GIC_DIST_TARGET(_gic_table[index].dist_hw_base, irq);
+
+    old_tgt &= ~(0x0FFUL << ((irq % 4)*8));
+    old_tgt |=   cpumask << ((irq % 4)*8);
+
+    GIC_DIST_TARGET(_gic_table[index].dist_hw_base, irq) = old_tgt;
+}
+
+void arm_gic_umask(rt_uint32_t index, int irq)
+{
+    rt_uint32_t mask = 1 << (irq % 32);
+
+    RT_ASSERT(index < ARM_GIC_MAX_NR);
+
+    irq = irq - _gic_table[index].offset;
+    RT_ASSERT(irq >= 0);
+
+    GIC_DIST_ENABLE_SET(_gic_table[index].dist_hw_base, irq) = mask;
+}
+
+void arm_gic_dump_type(rt_uint32_t index)
+{
+    unsigned int gic_type;
+
+    gic_type = GIC_DIST_TYPE(_gic_table[index].dist_hw_base);
+    rt_kprintf("GICv%d on %p, max IRQs: %d, %s security extension(%08x)\n",
+               (GIC_DIST_ICPIDR2(_gic_table[index].dist_hw_base) >> 4) & 0xf,
+               _gic_table[index].dist_hw_base,
+               _gic_max_irq,
+               gic_type & (1 << 10) ? "has" : "no",
+               gic_type);
+}
+
+void arm_gic_dump(rt_uint32_t index)
+{
+    unsigned int i, k;
+
+    k = GIC_CPU_HIGHPRI(_gic_table[index].cpu_hw_base);
+    rt_kprintf("--- high pending priority: %d(%08x)\n", k, k);
+    rt_kprintf("--- hw mask ---\n");
+    for (i = 0; i < _gic_max_irq / 32; i++)
+    {
+        rt_kprintf("0x%08x, ",
+                   GIC_DIST_ENABLE_SET(_gic_table[index].dist_hw_base,
+                                       i * 32));
+    }
+    rt_kprintf("\n--- hw pending ---\n");
+    for (i = 0; i < _gic_max_irq / 32; i++)
+    {
+        rt_kprintf("0x%08x, ",
+                   GIC_DIST_PENDING_SET(_gic_table[index].dist_hw_base,
+                                        i * 32));
+    }
+    rt_kprintf("\n--- hw active ---\n");
+    for (i = 0; i < _gic_max_irq / 32; i++)
+    {
+        rt_kprintf("0x%08x, ",
+                   GIC_DIST_ACTIVE_SET(_gic_table[index].dist_hw_base,
+                                       i * 32));
+    }
+    rt_kprintf("\n");
+}
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+FINSH_FUNCTION_EXPORT_ALIAS(arm_gic_dump, gic, show gic status);
+#endif
+
+int arm_gic_dist_init(rt_uint32_t index, rt_uint32_t dist_base, int irq_start)
+{
+    unsigned int gic_type, i;
+    rt_uint32_t cpumask = 1 << 0;
+
+    RT_ASSERT(index < ARM_GIC_MAX_NR);
+
+    _gic_table[index].dist_hw_base = dist_base;
+    _gic_table[index].offset = irq_start;
+
+    /* Find out how many interrupts are supported. */
+    gic_type = GIC_DIST_TYPE(dist_base);
+    _gic_max_irq = ((gic_type & 0x1f) + 1) * 32;
+
+    /*
+     * The GIC only supports up to 1020 interrupt sources.
+     * Limit this to either the architected maximum, or the
+     * platform maximum.
+     */
+    if (_gic_max_irq > 1020)
+        _gic_max_irq = 1020;
+    if (_gic_max_irq > ARM_GIC_NR_IRQS)
+        _gic_max_irq = ARM_GIC_NR_IRQS;
+
+    cpumask |= cpumask << 8;
+    cpumask |= cpumask << 16;
+
+    GIC_DIST_CTRL(dist_base) = 0x0;
+
+    /* Set all global interrupts to be level triggered, active low. */
+    for (i = 32; i < _gic_max_irq; i += 16)
+        GIC_DIST_CONFIG(dist_base, i) = 0x0;
+
+    /* Set all global interrupts to this CPU only. */
+    for (i = 32; i < _gic_max_irq; i += 4)
+        GIC_DIST_TARGET(dist_base, i) = cpumask;
+
+    /* Set priority on all interrupts. */
+    for (i = 0; i < _gic_max_irq; i += 4)
+        GIC_DIST_PRI(dist_base, i) = 0xa0a0a0a0;
+
+    /* Disable all interrupts. */
+    for (i = 0; i < _gic_max_irq; i += 32)
+        GIC_DIST_ENABLE_CLEAR(dist_base, i) = 0xffffffff;
+
+#if 0
+    /* All interrupts defaults to IGROUP1(IRQ). */
+    for (i = 0; i < _gic_max_irq; i += 32)
+        GIC_DIST_IGROUP(dist_base, i) = 0xffffffff;
+#endif
+
+    /* Enable group0 and group1 interrupt forwarding. */
+    GIC_DIST_CTRL(dist_base) = 0x03;
+
+    return 0;
+}
+
+int arm_gic_cpu_init(rt_uint32_t index, rt_uint32_t cpu_base)
+{
+    RT_ASSERT(index < ARM_GIC_MAX_NR);
+
+    _gic_table[index].cpu_hw_base = cpu_base;
+
+    GIC_CPU_PRIMASK(cpu_base) = 0xf0;
+    /* Enable CPU interrupt */
+    GIC_CPU_CTRL(cpu_base) = 0x01;
+
+    return 0;
+}
+
+void arm_gic_set_group(rt_uint32_t index, int vector, int group)
+{
+    /* As for GICv2, there are only group0 and group1. */
+    RT_ASSERT(group <= 1);
+    RT_ASSERT(vector < _gic_max_irq);
+
+    if (group == 0)
+    {
+        GIC_DIST_IGROUP(_gic_table[index].dist_hw_base,
+                        vector) &= ~(1 << (vector % 32));
+    }
+    else if (group == 1)
+    {
+        GIC_DIST_IGROUP(_gic_table[index].dist_hw_base,
+                        vector) |=  (1 << (vector % 32));
+    }
+}

bsp/qemu-vexpress-a9/cpu/gic.h

+/*
+ * File      : gic.h, ARM Generic Interrupt Controller
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013, RT-Thread Develop Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-20     Bernard      first version
+ */
+
+#ifndef __GIC_H__
+#define __GIC_H__
+
+int arm_gic_dist_init(rt_uint32_t index, rt_uint32_t dist_base, int irq_start);
+int arm_gic_cpu_init(rt_uint32_t index, rt_uint32_t cpu_base);
+
+void arm_gic_mask(rt_uint32_t index, int irq);
+void arm_gic_umask(rt_uint32_t index, int irq);
+void arm_gic_set_cpu(rt_uint32_t index, int irq, unsigned int cpumask);
+void arm_gic_set_group(rt_uint32_t index, int vector, int group);
+
+int arm_gic_get_active_irq(rt_uint32_t index);
+void arm_gic_ack(rt_uint32_t index, int irq);
+
+void arm_gic_dump_type(rt_uint32_t index);
+
+#endif
+

bsp/qemu-vexpress-a9/cpu/interrupt.c

+/*
+ * File      : interrupt.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013-2014, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-06     Bernard      first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include "realview.h"
+#include "gic.h"
+
+#define MAX_HANDLERS                NR_IRQS_PBA8
+
+extern volatile rt_uint8_t rt_interrupt_nest;
+
+/* exception and interrupt handler table */
+struct rt_irq_desc isr_table[MAX_HANDLERS];
+
+/* Those varibles will be accessed in ISR, so we need to share them. */
+rt_uint32_t rt_interrupt_from_thread;
+rt_uint32_t rt_interrupt_to_thread;
+rt_uint32_t rt_thread_switch_interrupt_flag;
+
+const unsigned int VECTOR_BASE = 0x00;
+extern void rt_cpu_vector_set_base(unsigned int addr);
+extern int system_vectors;
+
+static void rt_hw_vector_init(void)
+{
+    rt_cpu_vector_set_base((unsigned int)&system_vectors);
+}
+
+/**
+ * This function will initialize hardware interrupt
+ */
+void rt_hw_interrupt_init(void)
+{
+    rt_uint32_t gic_cpu_base;
+    rt_uint32_t gic_dist_base;
+
+    /* initialize vector table */
+    rt_hw_vector_init();
+
+    /* initialize exceptions table */
+    rt_memset(isr_table, 0x00, sizeof(isr_table));
+
+    /* initialize ARM GIC */
+    gic_dist_base = REALVIEW_GIC_DIST_BASE;
+    gic_cpu_base = REALVIEW_GIC_CPU_BASE;
+
+    arm_gic_dist_init(0, gic_dist_base, 0);
+    arm_gic_cpu_init(0, gic_cpu_base);
+
+    /* init interrupt nest, and context in thread sp */
+    rt_interrupt_nest = 0;
+    rt_interrupt_from_thread = 0;
+    rt_interrupt_to_thread = 0;
+    rt_thread_switch_interrupt_flag = 0;
+}
+
+/**
+ * This function will mask a interrupt.
+ * @param vector the interrupt number
+ */
+void rt_hw_interrupt_mask(int vector)
+{
+    arm_gic_mask(0, vector);
+}
+
+/**
+ * This function will un-mask a interrupt.
+ * @param vector the interrupt number
+ */
+void rt_hw_interrupt_umask(int vector)
+{
+    arm_gic_umask(0, vector);
+}
+
+/**
+ * This function will install a interrupt service routine to a interrupt.
+ * @param vector the interrupt number
+ * @param new_handler the interrupt service routine to be installed
+ * @param old_handler the old interrupt service routine
+ */
+rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
+        void *param, char *name)
+{
+    rt_isr_handler_t old_handler = RT_NULL;
+
+    if (vector < MAX_HANDLERS)
+    {
+        old_handler = isr_table[vector].handler;
+
+        if (handler != RT_NULL)
+        {
+#ifdef RT_USING_INTERRUPT_INFO
+            rt_strncpy(isr_table[vector].name, name, RT_NAME_MAX);
+#endif /* RT_USING_INTERRUPT_INFO */
+            isr_table[vector].handler = handler;
+            isr_table[vector].param = param;
+        }
+    }
+
+    return old_handler;
+}

bsp/qemu-vexpress-a9/cpu/interrupt.h

+/*
+ * File      : interrupt.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-06     Bernard      first version
+ */
+
+#ifndef __INTERRUPT_H__
+#define __INTERRUPT_H__
+
+#define INT_IRQ     0x00
+#define INT_FIQ     0x01
+
+void rt_hw_interrupt_control(int vector, int priority, int route);
+
+void rt_hw_interrupt_init(void);
+
+#endif

bsp/qemu-vexpress-a9/cpu/mmu.c

+/*
+ * File      : mmu.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2012-01-10     bernard      porting to AM1808
+ */
+
+#include <rtthread.h>
+#include <rthw.h>
+#include <board.h>
+
+#include "cp15.h"
+
+#define DESC_SEC       (0x2)
+#define CB             (3<<2)  //cache_on, write_back
+#define CNB            (2<<2)  //cache_on, write_through
+#define NCB            (1<<2)  //cache_off,WR_BUF on
+#define NCNB           (0<<2)  //cache_off,WR_BUF off
+#define AP_RW          (3<<10) //supervisor=RW, user=RW
+#define AP_RO          (2<<10) //supervisor=RW, user=RO
+#define XN             (1<<4)  // eXecute Never
+
+#define DOMAIN_FAULT   (0x0)
+#define DOMAIN_CHK     (0x1)
+#define DOMAIN_NOTCHK  (0x3)
+#define DOMAIN0        (0x0<<5)
+#define DOMAIN1        (0x1<<5)
+
+#define DOMAIN0_ATTR   (DOMAIN_CHK<<0)
+#define DOMAIN1_ATTR   (DOMAIN_FAULT<<2)
+
+/* Read/Write, cache, write back */
+#define RW_CB          (AP_RW|DOMAIN0|CB|DESC_SEC)
+/* Read/Write, cache, write through */
+#define RW_CNB         (AP_RW|DOMAIN0|CNB|DESC_SEC)
+/* Read/Write without cache and write buffer */
+#define RW_NCNB        (AP_RW|DOMAIN0|NCNB|DESC_SEC)
+/* Read/Write without cache and write buffer, no execute */
+#define RW_NCNBXN      (AP_RW|DOMAIN0|NCNB|DESC_SEC|XN)
+/* Read/Write without cache and write buffer */
+#define RW_FAULT       (AP_RW|DOMAIN1|NCNB|DESC_SEC)
+
+/* dump 2nd level page table */
+void rt_hw_cpu_dump_page_table_2nd(rt_uint32_t *ptb)
+{
+    int i;
+    int fcnt = 0;
+
+    for (i = 0; i < 256; i++)
+    {
+        rt_uint32_t pte2 = ptb[i];
+        if ((pte2 & 0x3) == 0)
+        {
+            if (fcnt == 0)
+                rt_kprintf("    ");
+            rt_kprintf("%04x: ", i);
+            fcnt++;
+            if (fcnt == 16)
+            {
+                rt_kprintf("fault\n");
+                fcnt = 0;
+            }
+            continue;
+        }
+        if (fcnt != 0)
+        {
+            rt_kprintf("fault\n");
+            fcnt = 0;
+        }
+
+        rt_kprintf("    %04x: %x: ", i, pte2);
+        if ((pte2 & 0x3) == 0x1)
+        {
+            rt_kprintf("L,ap:%x,xn:%d,texcb:%02x\n",
+                       ((pte2 >> 7) | (pte2 >> 4))& 0xf,
+                       (pte2 >> 15) & 0x1,
+                       ((pte2 >> 10) | (pte2 >> 2)) & 0x1f);
+        }
+        else
+        {
+            rt_kprintf("S,ap:%x,xn:%d,texcb:%02x\n",
+                       ((pte2 >> 7) | (pte2 >> 4))& 0xf, pte2 & 0x1,
+                       ((pte2 >> 4) | (pte2 >> 2)) & 0x1f);
+        }
+    }
+}
+
+void rt_hw_cpu_dump_page_table(rt_uint32_t *ptb)
+{
+    int i;
+    int fcnt = 0;
+
+    rt_kprintf("page table@%p\n", ptb);
+    for (i = 0; i < 1024*4; i++)
+    {
+        rt_uint32_t pte1 = ptb[i];
+        if ((pte1 & 0x3) == 0)
+        {
+            rt_kprintf("%03x: ", i);
+            fcnt++;
+            if (fcnt == 16)
+            {
+                rt_kprintf("fault\n");
+                fcnt = 0;
+            }
+            continue;
+        }
+        if (fcnt != 0)
+        {
+            rt_kprintf("fault\n");
+            fcnt = 0;
+        }
+
+        rt_kprintf("%03x: %08x: ", i, pte1);
+        if ((pte1 & 0x3) == 0x3)
+        {
+            rt_kprintf("LPAE\n");
+        }
+        else if ((pte1 & 0x3) == 0x1)
+        {
+            rt_kprintf("pte,ns:%d,domain:%d\n",
+                       (pte1 >> 3) & 0x1, (pte1 >> 5) & 0xf);
+            /*
+             *rt_hw_cpu_dump_page_table_2nd((void*)((pte1 & 0xfffffc000)
+             *                               - 0x80000000 + 0xC0000000));
+             */
+        }
+        else if (pte1 & (1 << 18))
+        {
+            rt_kprintf("super section,ns:%d,ap:%x,xn:%d,texcb:%02x\n",
+                       (pte1 >> 19) & 0x1,
+                       ((pte1 >> 13) | (pte1 >> 10))& 0xf,
+                       (pte1 >> 4) & 0x1,
+                       ((pte1 >> 10) | (pte1 >> 2)) & 0x1f);
+        }
+        else
+        {
+            rt_kprintf("section,ns:%d,ap:%x,"
+                       "xn:%d,texcb:%02x,domain:%d\n",
+                       (pte1 >> 19) & 0x1,
+                       ((pte1 >> 13) | (pte1 >> 10))& 0xf,
+                       (pte1 >> 4) & 0x1,
+                       (((pte1 & (0x7 << 12)) >> 10) |
+                        ((pte1 &        0x0c) >>  2)) & 0x1f,
+                       (pte1 >> 5) & 0xf);
+        }
+    }
+}
+
+/* level1 page table, each entry for 1MB memory. */
+volatile static unsigned long MMUTable[4*1024] __attribute__((aligned(16*1024)));
+void rt_hw_mmu_setmtt(rt_uint32_t vaddrStart,
+                      rt_uint32_t vaddrEnd,
+                      rt_uint32_t paddrStart,
+                      rt_uint32_t attr)
+{
+    volatile rt_uint32_t *pTT;
+    volatile int i, nSec;
+    pTT  = (rt_uint32_t *)MMUTable + (vaddrStart >> 20);
+    nSec = (vaddrEnd >> 20) - (vaddrStart >> 20);
+    for(i = 0; i <= nSec; i++)
+    {
+        *pTT = attr | (((paddrStart >> 20) + i) << 20);
+        pTT++;
+    }
+}
+
+unsigned long rt_hw_set_domain_register(unsigned long domain_val)
+{
+    unsigned long old_domain;
+
+    asm volatile ("mrc p15, 0, %0, c3, c0\n" : "=r" (old_domain));
+    asm volatile ("mcr p15, 0, %0, c3, c0\n" : :"r" (domain_val) : "memory");
+
+    return old_domain;
+}
+
+void rt_hw_mmu_init(void)
+{
+    rt_hw_cpu_dcache_disable();
+    rt_hw_cpu_icache_disable();
+    rt_cpu_mmu_disable();
+
+    /* set page table */
+    /* 4G 1:1 memory */
+    rt_hw_mmu_setmtt(0, 0xffffffff-1, 0, RW_CB);
+    /* IO memory region */
+    rt_hw_mmu_setmtt(0x44000000, 0x80000000-1, 0x44000000, RW_NCNBXN);
+
+    /*rt_hw_cpu_dump_page_table(MMUTable);*/
+    rt_hw_set_domain_register(0x55555555);
+
+    rt_cpu_tlb_set(MMUTable);
+
+    rt_cpu_mmu_enable();
+
+    rt_hw_cpu_icache_enable();
+    rt_hw_cpu_dcache_enable();
+}
+

bsp/qemu-vexpress-a9/cpu/pmu.c

+#include <rtthread.h>
+#include "pmu.h"
+
+void rt_hw_pmu_dump_feature(void)
+{
+    unsigned long reg;
+
+    reg = rt_hw_pmu_get_control();
+    rt_kprintf("ARM PMU Implementor: %c, ID code: %02x, %d counters\n",
+               reg >> 24, (reg >> 16) & 0xff, (reg >> 11) & 0x1f);
+    RT_ASSERT(ARM_PMU_CNTER_NR == ((reg >> 11) & 0x1f));
+}

bsp/qemu-vexpress-a9/cpu/pmu.h

+#ifndef __PMU_H__
+#define __PMU_H__
+
+#include "board.h"
+
+/* Number of counters */
+#define ARM_PMU_CNTER_NR 4
+
+enum rt_hw_pmu_event_type {
+    ARM_PMU_EVENT_PMNC_SW_INCR      = 0x00,
+    ARM_PMU_EVENT_L1_ICACHE_REFILL  = 0x01,
+    ARM_PMU_EVENT_ITLB_REFILL       = 0x02,
+    ARM_PMU_EVENT_L1_DCACHE_REFILL  = 0x03,
+    ARM_PMU_EVENT_L1_DCACHE_ACCESS  = 0x04,
+    ARM_PMU_EVENT_DTLB_REFILL       = 0x05,
+    ARM_PMU_EVENT_MEM_READ          = 0x06,
+    ARM_PMU_EVENT_MEM_WRITE         = 0x07,
+    ARM_PMU_EVENT_INSTR_EXECUTED    = 0x08,
+    ARM_PMU_EVENT_EXC_TAKEN         = 0x09,
+    ARM_PMU_EVENT_EXC_EXECUTED      = 0x0A,
+    ARM_PMU_EVENT_CID_WRITE         = 0x0B,
+};
+
+/* Enable bit */
+#define ARM_PMU_PMCR_E   (0x01 << 0)
+/* Event counter reset */
+#define ARM_PMU_PMCR_P   (0x01 << 1)
+/* Cycle counter reset */
+#define ARM_PMU_PMCR_C   (0x01 << 2)
+/* Cycle counter divider */
+#define ARM_PMU_PMCR_D   (0x01 << 3)
+
+#ifdef __GNUC__
+rt_inline void rt_hw_pmu_enable_cnt(int divide64)
+{
+    unsigned long pmcr;
+    unsigned long pmcntenset;
+
+    asm volatile ("mrc p15, 0, %0, c9, c12, 0" : "=r"(pmcr));
+    pmcr |= ARM_PMU_PMCR_E | ARM_PMU_PMCR_P | ARM_PMU_PMCR_C;
+    if (divide64)
+        pmcr |= ARM_PMU_PMCR_D;
+    else
+        pmcr &= ~ARM_PMU_PMCR_D;
+    asm volatile ("mcr p15, 0, %0, c9, c12, 0" :: "r"(pmcr));
+
+    /* enable all the counters */
+    pmcntenset = ~0;
+    asm volatile ("mcr p15, 0, %0, c9, c12, 1" :: "r"(pmcntenset));
+    /* clear overflows(just in case) */
+    asm volatile ("mcr p15, 0, %0, c9, c12, 3" :: "r"(pmcntenset));
+}
+
+rt_inline unsigned long rt_hw_pmu_get_control(void)
+{
+    unsigned long pmcr;
+    asm ("mrc p15, 0, %0, c9, c12, 0" : "=r"(pmcr));
+    return pmcr;
+}
+
+rt_inline unsigned long rt_hw_pmu_get_ceid(void)
+{
+    unsigned long reg;
+    /* only PMCEID0 is supported, PMCEID1 is RAZ. */
+    asm ("mrc p15, 0, %0, c9, c12, 6" : "=r"(reg));
+    return reg;
+}
+
+rt_inline unsigned long rt_hw_pmu_get_cnten(void)
+{
+    unsigned long pmcnt;
+    asm ("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcnt));
+    return pmcnt;
+}
+
+rt_inline void rt_hw_pmu_reset_cycle(void)
+{
+    unsigned long pmcr;
+
+    asm volatile ("mrc p15, 0, %0, c9, c12, 0" : "=r"(pmcr));
+    pmcr |= ARM_PMU_PMCR_C;
+    asm volatile ("mcr p15, 0, %0, c9, c12, 0" :: "r"(pmcr));
+    asm volatile ("isb");
+}
+
+rt_inline void rt_hw_pmu_reset_event(void)
+{
+    unsigned long pmcr;
+
+    asm volatile ("mrc p15, 0, %0, c9, c12, 0" : "=r"(pmcr));
+    pmcr |= ARM_PMU_PMCR_P;
+    asm volatile ("mcr p15, 0, %0, c9, c12, 0" :: "r"(pmcr));
+    asm volatile ("isb");
+}
+
+rt_inline unsigned long rt_hw_pmu_get_cycle(void)
+{
+    unsigned long cyc;
+    asm volatile ("isb");
+    asm volatile ("mrc  p15, 0, %0, c9, c13, 0" : "=r"(cyc));
+    return cyc;
+}
+
+rt_inline void rt_hw_pmu_select_counter(int idx)
+{
+    RT_ASSERT(idx < ARM_PMU_CNTER_NR);
+
+    asm volatile ("mcr p15, 0, %0, c9, c12, 5" : : "r"(idx));
+    /* Linux add an isb here, don't know why here. */
+    asm volatile ("isb");
+}
+
+rt_inline void rt_hw_pmu_select_event(int idx,
+                                      enum rt_hw_pmu_event_type eve)
+{
+    RT_ASSERT(idx < ARM_PMU_CNTER_NR);
+
+    rt_hw_pmu_select_counter(idx);
+    asm volatile ("mcr p15, 0, %0, c9, c13, 1" : : "r"(eve));
+}
+
+rt_inline unsigned long rt_hw_pmu_read_counter(int idx)
+{
+    unsigned long reg;
+
+    rt_hw_pmu_select_counter(idx);
+    asm volatile ("isb");
+    asm volatile ("mrc p15, 0, %0, c9, c13, 2" : "=r"(reg));
+    return reg;
+}
+
+rt_inline unsigned long rt_hw_pmu_get_ovsr(void)
+{
+    unsigned long reg;
+    asm volatile ("isb");
+    asm ("mrc  p15, 0, %0, c9, c12, 3" : "=r"(reg));
+    return reg;
+}
+
+rt_inline void rt_hw_pmu_clear_ovsr(unsigned long reg)
+{
+    asm ("mcr  p15, 0, %0, c9, c12, 3" : : "r"(reg));
+    asm volatile ("isb");
+}
+
+#endif
+
+void rt_hw_pmu_dump_feature(void);
+
+#endif /* end of include guard: __PMU_H__ */
+

bsp/qemu-vexpress-a9/cpu/stack.c

+/*
+ * File      : stack.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-09-23     Bernard      the first version
+ * 2011-10-05     Bernard      add thumb mode
+ */
+#include <rtthread.h>
+#include <board.h>
+
+/**
+ * @addtogroup AM33xx
+ */
+/*@{*/
+
+/**
+ * This function will initialize thread stack
+ *
+ * @param tentry the entry of thread
+ * @param parameter the parameter of entry 
+ * @param stack_addr the beginning stack address
+ * @param texit the function will be called when thread exit
+ *
+ * @return stack address
+ */
+rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
+	rt_uint8_t *stack_addr, void *texit)
+{
+	rt_uint32_t *stk;
+
+	stk 	 = (rt_uint32_t*)stack_addr;
+	*(stk) 	 = (rt_uint32_t)tentry;			/* entry point */
+	*(--stk) = (rt_uint32_t)texit;			/* lr */
+	*(--stk) = 0;							/* r12 */
+	*(--stk) = 0;							/* r11 */
+	*(--stk) = 0;							/* r10 */
+	*(--stk) = 0;							/* r9 */
+	*(--stk) = 0;							/* r8 */
+	*(--stk) = 0;							/* r7 */
+	*(--stk) = 0;							/* r6 */
+	*(--stk) = 0;							/* r5 */
+	*(--stk) = 0;							/* r4 */
+	*(--stk) = 0;							/* r3 */
+	*(--stk) = 0;							/* r2 */
+	*(--stk) = 0;							/* r1 */
+	*(--stk) = (rt_uint32_t)parameter;		/* r0 : argument */
+
+	/* cpsr */
+	if ((rt_uint32_t)tentry & 0x01)
+		*(--stk) = SVCMODE | 0x20;			/* thumb mode */
+	else
+		*(--stk) = SVCMODE;					/* arm mode   */
+
+	/* return task's current stack address */
+	return (rt_uint8_t *)stk;
+}
+
+/*@}*/

bsp/qemu-vexpress-a9/cpu/start_gcc.S

+/*
+ * File      : start_gcc.S
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013-2014, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-05     Bernard      the first version
+ */
+
+.equ Mode_USR,        0x10
+.equ Mode_FIQ,        0x11
+.equ Mode_IRQ,        0x12
+.equ Mode_SVC,        0x13
+.equ Mode_ABT,        0x17
+.equ Mode_UND,        0x1B
+.equ Mode_SYS,        0x1F
+
+.equ I_Bit,           0x80            @ when I bit is set, IRQ is disabled
+.equ F_Bit,           0x40            @ when F bit is set, FIQ is disabled
+
+.equ UND_Stack_Size,     0x00000000
+.equ SVC_Stack_Size,     0x00000100
+.equ ABT_Stack_Size,     0x00000000
+.equ RT_FIQ_STACK_PGSZ,  0x00000000
+.equ RT_IRQ_STACK_PGSZ,  0x00000100
+.equ USR_Stack_Size,     0x00000100
+
+#define ISR_Stack_Size  (UND_Stack_Size + SVC_Stack_Size + ABT_Stack_Size + \
+                 RT_FIQ_STACK_PGSZ + RT_IRQ_STACK_PGSZ)
+
+.section .data.share.isr
+/* stack */
+.globl stack_start
+.globl stack_top
+
+stack_start:
+.rept ISR_Stack_Size
+.byte 0
+.endr
+stack_top:
+
+.text
+/* reset entry */
+.globl _reset
+_reset:
+    /* set the cpu to SVC32 mode and disable interrupt */
+    mrs     r0, cpsr
+    bic     r0, r0, #0x1f
+    orr     r0, r0, #0x13
+    msr     cpsr_c, r0
+
+    /* setup stack */
+    bl      stack_setup
+
+    /* clear .bss */
+    mov     r0,#0                   /* get a zero                       */
+    ldr     r1,=__bss_start         /* bss start                        */
+    ldr     r2,=__bss_end           /* bss end                          */
+
+bss_loop:
+    cmp     r1,r2                   /* check if data to clear           */
+    strlo   r0,[r1],#4              /* clear 4 bytes                    */
+    blo     bss_loop                /* loop until done                  */
+
+    /* call C++ constructors of global objects                          */
+    ldr     r0, =__ctors_start__
+    ldr     r1, =__ctors_end__
+
+ctor_loop:
+    cmp     r0, r1
+    beq     ctor_end
+    ldr     r2, [r0], #4
+    stmfd   sp!, {r0-r1}
+    mov     lr, pc
+    bx      r2
+    ldmfd   sp!, {r0-r1}
+    b       ctor_loop
+ctor_end:
+
+    /* start RT-Thread Kernel */
+    ldr     pc, _rtthread_startup
+_rtthread_startup:
+    .word rtthread_startup
+
+stack_setup:
+    ldr     r0, =stack_top
+
+    @  Set the startup stack for svc
+    mov     sp, r0
+
+    @  Enter Undefined Instruction Mode and set its Stack Pointer
+    msr     cpsr_c, #Mode_UND|I_Bit|F_Bit
+    mov     sp, r0
+    sub     r0, r0, #UND_Stack_Size
+
+    @  Enter Abort Mode and set its Stack Pointer
+    msr     cpsr_c, #Mode_ABT|I_Bit|F_Bit
+    mov     sp, r0
+    sub     r0, r0, #ABT_Stack_Size
+
+    @  Enter FIQ Mode and set its Stack Pointer
+    msr     cpsr_c, #Mode_FIQ|I_Bit|F_Bit
+    mov     sp, r0
+    sub     r0, r0, #RT_FIQ_STACK_PGSZ
+
+    @  Enter IRQ Mode and set its Stack Pointer
+    msr     cpsr_c, #Mode_IRQ|I_Bit|F_Bit
+    mov     sp, r0
+    sub     r0, r0, #RT_IRQ_STACK_PGSZ
+
+    /* come back to SVC mode */
+    msr     cpsr_c, #Mode_SVC|I_Bit|F_Bit
+    bx      lr
+
+/* exception handlers: undef, swi, padt, dabt, resv, irq, fiq          */
+.section .text.isr, "ax"
+    .align  5
+.globl vector_fiq
+vector_fiq:
+    stmfd   sp!,{r0-r7,lr}
+    bl      rt_hw_trap_fiq
+    ldmfd   sp!,{r0-r7,lr}
+    subs    pc, lr, #4
+
+.globl      rt_interrupt_enter
+.globl      rt_interrupt_leave
+.globl      rt_thread_switch_interrupt_flag
+.globl      rt_interrupt_from_thread
+.globl      rt_interrupt_to_thread
+
+.globl      rt_current_thread
+
+    .align  5
+.globl vector_irq
+vector_irq:
+    stmfd   sp!, {r0-r12,lr}
+
+    bl      rt_interrupt_enter
+    bl      rt_hw_trap_irq
+    bl      rt_interrupt_leave
+
+    @ if rt_thread_switch_interrupt_flag set, jump to
+    @ rt_hw_context_switch_interrupt_do and don't return
+    ldr     r0, =rt_thread_switch_interrupt_flag
+    ldr     r1, [r0]
+    cmp     r1, #1
+    beq     rt_hw_context_switch_interrupt_do
+
+    ldmfd   sp!, {r0-r12,lr}
+    subs    pc,  lr, #4
+
+rt_hw_context_switch_interrupt_do:
+    mov     r1,  #0         @ clear flag
+    str     r1,  [r0]
+
+    mov     r1, sp          @ r1 point to {r0-r3} in stack
+    add     sp, sp, #4*4
+    ldmfd   sp!, {r4-r12,lr}@ reload saved registers
+    mrs     r0,  spsr       @ get cpsr of interrupt thread
+    sub     r2,  lr, #4     @ save old task's pc to r2
+
+    @ Switch to SVC mode with no interrupt. If the usr mode guest is
+    @ interrupted, this will just switch to the stack of kernel space.
+    @ save the registers in kernel space won't trigger data abort.
+    msr     cpsr_c, #I_Bit|F_Bit|Mode_SVC
+
+    stmfd   sp!, {r2}       @ push old task's pc
+    stmfd   sp!, {r4-r12,lr}@ push old task's lr,r12-r4
+    ldmfd   r1,  {r1-r4}    @ restore r0-r3 of the interrupt thread
+    stmfd   sp!, {r1-r4}    @ push old task's r0-r3
+    stmfd   sp!, {r0}       @ push old task's cpsr
+
+    ldr     r4,  =rt_interrupt_from_thread
+    ldr     r5,  [r4]
+    str     sp,  [r5]       @ store sp in preempted tasks's TCB
+
+    ldr     r6,  =rt_interrupt_to_thread
+    ldr     r6,  [r6]
+    ldr     sp,  [r6]       @ get new task's stack pointer
+
+    ldmfd   sp!, {r4}       @ pop new task's cpsr to spsr
+    msr     spsr_cxsf, r4
+
+    ldmfd   sp!, {r0-r12,lr,pc}^ @ pop new task's r0-r12,lr & pc, copy spsr to cpsr
+
+.macro push_svc_reg
+    sub     sp, sp, #17 * 4         @/* Sizeof(struct rt_hw_exp_stack)  */
+    stmia   sp, {r0 - r12}          @/* Calling r0-r12                  */
+    mov     r0, sp
+    mrs     r6, spsr                @/* Save CPSR                       */
+    str     lr, [r0, #15*4]         @/* Push PC                         */
+    str     r6, [r0, #16*4]         @/* Push CPSR                       */
+    cps     #Mode_SVC
+    str     sp, [r0, #13*4]         @/* Save calling SP                 */
+    str     lr, [r0, #14*4]         @/* Save calling PC                 */
+.endm
+
+    .align  5
+    .globl  vector_swi
+vector_swi:
+    push_svc_reg
+    bl      rt_hw_trap_swi
+    b       .
+
+    .align  5
+    .globl  vector_undef
+vector_undef:
+    push_svc_reg
+    bl      rt_hw_trap_undef
+    b       .
+
+    .align  5
+    .globl  vector_pabt
+vector_pabt:
+    push_svc_reg
+    bl      rt_hw_trap_pabt
+    b       .
+
+    .align  5
+    .globl  vector_dabt
+vector_dabt:
+    push_svc_reg
+    bl      rt_hw_trap_dabt
+    b       .
+
+    .align  5
+    .globl  vector_resv
+vector_resv:
+    push_svc_reg
+    bl      rt_hw_trap_resv
+    b       .

bsp/qemu-vexpress-a9/cpu/trap.c

+/*
+ * File      : trap.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013, RT-Thread Develop Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-20     Bernard      first version
+ */
+
+#include <rtthread.h>
+#include <rthw.h>
+#include <board.h>
+
+#include "armv7.h"
+
+#include "gic.h"
+
+extern struct rt_thread *rt_current_thread;
+#ifdef RT_USING_FINSH
+extern long list_thread(void);
+#endif
+
+/**
+ * this function will show registers of CPU
+ *
+ * @param regs the registers point
+ */
+void rt_hw_show_register(struct rt_hw_exp_stack *regs)
+{
+    rt_kprintf("Execption:\n");
+    rt_kprintf("r00:0x%08x r01:0x%08x r02:0x%08x r03:0x%08x\n", regs->r0, regs->r1, regs->r2, regs->r3);
+    rt_kprintf("r04:0x%08x r05:0x%08x r06:0x%08x r07:0x%08x\n", regs->r4, regs->r5, regs->r6, regs->r7);
+    rt_kprintf("r08:0x%08x r09:0x%08x r10:0x%08x\n", regs->r8, regs->r9, regs->r10);
+    rt_kprintf("fp :0x%08x ip :0x%08x\n", regs->fp, regs->ip);
+    rt_kprintf("sp :0x%08x lr :0x%08x pc :0x%08x\n", regs->sp, regs->lr, regs->pc);
+    rt_kprintf("cpsr:0x%08x\n", regs->cpsr);
+}
+
+/**
+ * When comes across an instruction which it cannot handle,
+ * it takes the undefined instruction trap.
+ *
+ * @param regs system registers
+ *
+ * @note never invoke this function in application
+ */
+void rt_hw_trap_undef(struct rt_hw_exp_stack *regs)
+{
+    rt_kprintf("undefined instruction:\n");
+    rt_hw_show_register(regs);
+#ifdef RT_USING_FINSH
+    list_thread();
+#endif
+    rt_hw_cpu_shutdown();
+}
+
+/**
+ * The software interrupt instruction (SWI) is used for entering
+ * Supervisor mode, usually to request a particular supervisor
+ * function.
+ *
+ * @param regs system registers
+ *
+ * @note never invoke this function in application
+ */
+void rt_hw_trap_swi(struct rt_hw_exp_stack *regs)
+{
+    rt_kprintf("software interrupt:\n");
+    rt_hw_show_register(regs);
+#ifdef RT_USING_FINSH
+    list_thread();
+#endif
+    rt_hw_cpu_shutdown();
+}
+
+/**
+ * An abort indicates that the current memory access cannot be completed,
+ * which occurs during an instruction prefetch.
+ *
+ * @param regs system registers
+ *
+ * @note never invoke this function in application
+ */
+void rt_hw_trap_pabt(struct rt_hw_exp_stack *regs)
+{
+    rt_kprintf("prefetch abort:\n");
+    rt_hw_show_register(regs);
+#ifdef RT_USING_FINSH
+    list_thread();
+#endif
+    rt_hw_cpu_shutdown();
+}
+
+/**
+ * An abort indicates that the current memory access cannot be completed,
+ * which occurs during a data access.
+ *
+ * @param regs system registers
+ *
+ * @note never invoke this function in application
+ */
+void rt_hw_trap_dabt(struct rt_hw_exp_stack *regs)
+{
+    rt_kprintf("data abort:");
+    rt_hw_show_register(regs);
+#ifdef RT_USING_FINSH
+    list_thread();
+#endif
+    rt_hw_cpu_shutdown();
+}
+
+/**
+ * Normally, system will never reach here
+ *
+ * @param regs system registers
+ *
+ * @note never invoke this function in application
+ */
+void rt_hw_trap_resv(struct rt_hw_exp_stack *regs)
+{
+    rt_kprintf("reserved trap:\n");
+    rt_hw_show_register(regs);
+#ifdef RT_USING_FINSH
+    list_thread();
+#endif
+    rt_hw_cpu_shutdown();
+}
+
+#define GIC_ACK_INTID_MASK              0x000003ff
+
+void rt_hw_trap_irq(void)
+{
+    void *param;
+    unsigned long ir;
+    unsigned long fullir;
+    rt_isr_handler_t isr_func;
+    extern struct rt_irq_desc isr_table[];
+
+    fullir = arm_gic_get_active_irq(0);
+    ir = fullir & GIC_ACK_INTID_MASK;
+
+    if (ir == 1023)
+    {
+        /* Spurious interrupt */
+        return;
+    }
+
+    /* get interrupt service routine */
+    isr_func = isr_table[ir].handler;
+#ifdef RT_USING_INTERRUPT_INFO
+    isr_table[ir].counter++;
+#endif
+    if (isr_func)
+    {
+        /* Interrupt for myself. */
+        param = isr_table[ir].param;
+        /* turn to interrupt service routine */
+        isr_func(ir, param);
+    }
+
+    /* end of interrupt */
+    arm_gic_ack(0, fullir);
+}
+
+void rt_hw_trap_fiq(void)
+{
+    void *param;
+    unsigned long ir;
+    unsigned long fullir;
+    rt_isr_handler_t isr_func;
+    extern struct rt_irq_desc isr_table[];
+
+    fullir = arm_gic_get_active_irq(0);
+    ir = fullir & GIC_ACK_INTID_MASK;
+
+    /* get interrupt service routine */
+    isr_func = isr_table[ir].handler;
+    param = isr_table[ir].param;
+
+    /* turn to interrupt service routine */
+    isr_func(ir, param);
+
+    /* end of interrupt */
+    arm_gic_ack(0, fullir);
+}
+

bsp/qemu-vexpress-a9/cpu/vector_gcc.S

+/*
+ * File      : vector_gcc.S
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-05     Bernard      the first version
+ */
+.section .vectors, "ax"
+.code 32
+
+.globl system_vectors
+system_vectors:
+    ldr pc, _vector_reset
+    ldr pc, _vector_undef
+    ldr pc, _vector_swi
+    ldr pc, _vector_pabt
+    ldr pc, _vector_dabt
+    ldr pc, _vector_resv
+    ldr pc, _vector_irq
+    ldr pc, _vector_fiq
+
+.globl _reset
+.globl vector_undef
+.globl vector_swi
+.globl vector_pabt
+.globl vector_dabt
+.globl vector_resv
+.globl vector_irq
+.globl vector_fiq
+
+_vector_reset:
+    .word _reset
+_vector_undef:
+    .word vector_undef
+_vector_swi:
+    .word vector_swi
+_vector_pabt:
+    .word vector_pabt
+_vector_dabt:
+    .word vector_dabt
+_vector_resv:
+    .word vector_resv
+_vector_irq:
+    .word vector_irq
+_vector_fiq:
+    .word vector_fiq
+
+.balignl    16,0xdeadbeef

bsp/qemu-vexpress-a9/drivers/Kconfig

+config RT_USING_UART0
+    bool "Enable UART0"
+    default y
+
+config RT_USING_UART1
+    bool "Enable UART1"
+    default y

bsp/qemu-vexpress-a9/drivers/SConscript

+import copy
+Import('RTT_ROOT')
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src	= Glob('*.c')
+
+CPPPATH = [cwd]
+
+group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

bsp/qemu-vexpress-a9/drivers/board.c

+/*
+ * File      : board.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2012, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2012-11-20     Bernard    the first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <components.h>
+
+#include "board.h"
+
+#define TIMER_LOAD(hw_base)             __REG32(hw_base + 0x00)
+#define TIMER_VALUE(hw_base)            __REG32(hw_base + 0x04)
+#define TIMER_CTRL(hw_base)             __REG32(hw_base + 0x08)
+#define TIMER_CTRL_ONESHOT              (1 << 0)
+#define TIMER_CTRL_32BIT                (1 << 1)
+#define TIMER_CTRL_DIV1                 (0 << 2)
+#define TIMER_CTRL_DIV16                (1 << 2)
+#define TIMER_CTRL_DIV256               (2 << 2)
+#define TIMER_CTRL_IE                   (1 << 5)        /* Interrupt Enable (versatile only) */
+#define TIMER_CTRL_PERIODIC             (1 << 6)
+#define TIMER_CTRL_ENABLE               (1 << 7)
+
+#define TIMER_INTCLR(hw_base)           __REG32(hw_base + 0x0c)
+#define TIMER_RIS(hw_base)              __REG32(hw_base + 0x10)
+#define TIMER_MIS(hw_base)              __REG32(hw_base + 0x14)
+#define TIMER_BGLOAD(hw_base)           __REG32(hw_base + 0x18)
+
+#define SYS_CTRL                        __REG32(REALVIEW_SCTL_BASE)
+
+#define TIMER_HW_BASE                   REALVIEW_TIMER2_3_BASE
+
+static void rt_hw_timer_isr(int vector, void *param)
+{
+    rt_tick_increase();
+    /* clear interrupt */
+    TIMER_INTCLR(TIMER_HW_BASE) = 0x01;
+}
+
+int rt_hw_timer_init(void)
+{
+    rt_uint32_t val;
+
+    SYS_CTRL |= REALVIEW_REFCLK;
+
+    /* Setup Timer0 for generating irq */
+    val = TIMER_CTRL(TIMER_HW_BASE);
+    val &= ~TIMER_CTRL_ENABLE;
+    val |= (TIMER_CTRL_32BIT | TIMER_CTRL_PERIODIC | TIMER_CTRL_IE);
+    TIMER_CTRL(TIMER_HW_BASE) = val;
+
+    TIMER_LOAD(TIMER_HW_BASE) = 1000;
+
+    /* enable timer */
+    TIMER_CTRL(TIMER_HW_BASE) |= TIMER_CTRL_ENABLE;
+
+    rt_hw_interrupt_install(IRQ_PBA8_TIMER2_3, rt_hw_timer_isr, RT_NULL, "tick");
+    rt_hw_interrupt_umask(IRQ_PBA8_TIMER2_3);
+
+    return 0;
+}
+INIT_BOARD_EXPORT(rt_hw_timer_init);
+
+void idle_wfi(void)
+{
+    asm volatile ("wfi");
+}
+
+/**
+ * This function will initialize beaglebone board
+ */
+void rt_hw_board_init(void)
+{
+    /* initialzie hardware interrupt */
+    rt_hw_interrupt_init();
+    rt_system_heap_init(HEAP_BEGIN, HEAP_END);
+
+    rt_components_board_init();
+    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
+
+    rt_thread_idle_sethook(idle_wfi);
+}

bsp/qemu-vexpress-a9/drivers/board.h

+/*
+ * File      : board.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-06     Bernard    the first version
+ */
+
+#ifndef __BOARD_H__
+#define __BOARD_H__
+
+#include <realview.h>
+
+#if defined(__CC_ARM)
+extern int Image$$RW_IRAM1$$ZI$$Limit;
+#define HEAP_BEGIN      ((void*)&Image$$RW_IRAM1$$ZI$$Limit)
+#elif defined(__GNUC__)
+extern int __bss_end;
+#define HEAP_BEGIN      ((void*)&__bss_end)
+#endif
+
+#define HEAP_END        (void*)(0x60000000 + 8 * 1024 * 1024)
+
+void rt_hw_board_init(void);
+
+#endif

bsp/qemu-vexpress-a9/drivers/realview.h

+#ifndef __AM33XX_H__
+#define __AM33XX_H__
+
+#define __REG32(x)  (*((volatile unsigned int *)(x)))
+#define __REG16(x)  (*((volatile unsigned short *)(x)))
+
+/*
+ * Peripheral addresses
+ */
+#define REALVIEW_UART0_BASE         0x10009000  /* UART 0 */
+#define REALVIEW_UART1_BASE         0x1000A000  /* UART 1 */
+#define REALVIEW_UART2_BASE         0x1000B000  /* UART 2 */
+#define REALVIEW_UART3_BASE         0x1000C000  /* UART 3 */
+#define REALVIEW_SSP_BASE           0x1000D000  /* Synchronous Serial Port */
+#define REALVIEW_WATCHDOG0_BASE     0x1000F000  /* Watchdog 0 */
+#define REALVIEW_WATCHDOG_BASE      0x10010000  /* watchdog interface */
+#define REALVIEW_TIMER0_1_BASE      0x10011000  /* Timer 0 and 1 */
+#define REALVIEW_TIMER2_3_BASE      0x10012000  /* Timer 2 and 3 */
+#define REALVIEW_GPIO0_BASE         0x10013000  /* GPIO port 0 */
+#define REALVIEW_RTC_BASE           0x10017000  /* Real Time Clock */
+#define REALVIEW_TIMER4_5_BASE      0x10018000  /* Timer 4/5 */
+#define REALVIEW_TIMER6_7_BASE      0x10019000  /* Timer 6/7 */
+#define REALVIEW_SCTL_BASE          0x10001000  /* System Controller */
+#define REALVIEW_CLCD_BASE          0x10020000  /* CLCD */
+#define REALVIEW_ONB_SRAM_BASE      0x10060000  /* On-board SRAM */
+#define REALVIEW_DMC_BASE           0x100E0000  /* DMC configuration */
+#define REALVIEW_SMC_BASE           0x100E1000  /* SMC configuration */
+#define REALVIEW_CAN_BASE           0x100E2000  /* CAN bus */
+#define REALVIEW_GIC_CPU_BASE       0x1E000100  /* Generic interrupt controller CPU interface */
+#define REALVIEW_FLASH0_BASE        0x40000000
+#define REALVIEW_FLASH0_SIZE        SZ_64M
+#define REALVIEW_FLASH1_BASE        0x44000000
+#define REALVIEW_FLASH1_SIZE        SZ_64M
+
+#define VEXPRESS_SRAM_BASE          0x48000000
+
+#define REALVIEW_ETH_BASE           0x4E000000  /* Ethernet */
+#define REALVIEW_USB_BASE           0x4F000000  /* USB */
+#define REALVIEW_GIC_DIST_BASE      0x1E001000  /* Generic interrupt controller distributor */
+#define REALVIEW_LT_BASE            0xC0000000  /* Logic Tile expansion */
+#define REALVIEW_SDRAM6_BASE        0x70000000  /* SDRAM bank 6 256MB */
+#define REALVIEW_SDRAM7_BASE        0x80000000  /* SDRAM bank 7 256MB */
+
+#define REALVIEW_SYS_PLD_CTRL1      0x74
+
+/*
+ * PCI regions
+ */
+#define REALVIEW_PCI_BASE           0x90040000  /* PCI-X Unit base */
+#define REALVIEW_PCI_IO_BASE        0x90050000  /* IO Region on AHB */
+#define REALVIEW_PCI_MEM_BASE       0xA0000000  /* MEM Region on AHB */
+
+#define REALVIEW_PCI_BASE_SIZE      0x10000     /* 16 Kb */
+#define REALVIEW_PCI_IO_SIZE        0x1000      /* 4 Kb */
+#define REALVIEW_PCI_MEM_SIZE       0x20000000  /* 512 MB */
+
+/*
+ * Memory definitions
+ */
+#define REALVIEW_BOOT_ROM_LO          0x30000000    /* DoC Base (64Mb)... */
+#define REALVIEW_BOOT_ROM_HI          0x30000000
+#define REALVIEW_BOOT_ROM_BASE        REALVIEW_BOOT_ROM_HI  /*  Normal position */
+#define REALVIEW_BOOT_ROM_SIZE        SZ_64M
+
+#define REALVIEW_SSRAM_BASE /* REALVIEW_SSMC_BASE ? */
+#define REALVIEW_SSRAM_SIZE           SZ_2M
+
+/*
+ *  SDRAM
+ */
+#define REALVIEW_SDRAM_BASE           0x00000000
+
+/*
+ *  Logic expansion modules
+ *
+ */
+#define IRQ_PBA8_GIC_START          32
+
+/*
+ * PB-A8 on-board gic irq sources
+ */
+#define IRQ_PBA8_WATCHDOG   (IRQ_PBA8_GIC_START + 0)    /* Watchdog timer */
+#define IRQ_PBA8_SOFT       (IRQ_PBA8_GIC_START + 1)    /* Software interrupt */
+#define IRQ_PBA8_TIMER0_1   (IRQ_PBA8_GIC_START + 2)    /* Timer 0/1 (default timer) */
+#define IRQ_PBA8_TIMER2_3   (IRQ_PBA8_GIC_START + 3)    /* Timer 2/3 */
+#define IRQ_PBA8_RTC        (IRQ_PBA8_GIC_START + 4)    /* Timer 2/3 */
+
+#define IRQ_PBA8_UART0      (IRQ_PBA8_GIC_START + 5)    /* UART 0 on development chip */
+#define IRQ_PBA8_UART1      (IRQ_PBA8_GIC_START + 6)    /* UART 1 on development chip */
+#define IRQ_PBA8_UART2      (IRQ_PBA8_GIC_START + 7)    /* UART 2 on development chip */
+#define IRQ_PBA8_UART3      (IRQ_PBA8_GIC_START + 8)    /* UART 3 on development chip */
+
+/* 9 reserved */
+#define IRQ_PBA8_SSP        (IRQ_PBA8_GIC_START + 11)   /* Synchronous Serial Port */
+#define IRQ_PBA8_SCI        (IRQ_PBA8_GIC_START + 16)   /* Smart Card Interface */
+#define IRQ_PBA8_MMCI0A     (IRQ_PBA8_GIC_START + 17)   /* Multimedia Card 0A */
+#define IRQ_PBA8_MMCI0B     (IRQ_PBA8_GIC_START + 18)   /* Multimedia Card 0B */
+#define IRQ_PBA8_AACI       (IRQ_PBA8_GIC_START + 19)   /* Audio Codec */
+#define IRQ_PBA8_KMI0       (IRQ_PBA8_GIC_START + 20)   /* Keyboard/Mouse port 0 */
+#define IRQ_PBA8_KMI1       (IRQ_PBA8_GIC_START + 21)   /* Keyboard/Mouse port 1 */
+#define IRQ_PBA8_CHARLCD    (IRQ_PBA8_GIC_START + 22)   /* Character LCD */
+#define IRQ_PBA8_CLCD       (IRQ_PBA8_GIC_START + 23)   /* CLCD controller */
+#define IRQ_PBA8_DMAC       (IRQ_PBA8_GIC_START + 24)   /* DMA controller */
+#define IRQ_PBA8_PWRFAIL    (IRQ_PBA8_GIC_START + 25)   /* Power failure */
+#define IRQ_PBA8_PISMO      (IRQ_PBA8_GIC_START + 26)   /* PISMO interface */
+#define IRQ_PBA8_DoC        (IRQ_PBA8_GIC_START + 27)   /* Disk on Chip memory controller */
+#define IRQ_PBA8_ETH        (IRQ_PBA8_GIC_START + 28)   /* Ethernet controller */
+#define IRQ_PBA8_USB        (IRQ_PBA8_GIC_START + 29)   /* USB controller */
+#define IRQ_PBA8_TSPEN      (IRQ_PBA8_GIC_START + 30)   /* Touchscreen pen */
+#define IRQ_PBA8_TSKPAD     (IRQ_PBA8_GIC_START + 31)   /* Touchscreen keypad */
+
+#define IRQ_PBA8_PMU        (IRQ_PBA8_GIC_START + 47)   /* Cortex-A8 PMU */
+
+/* ... */
+#define IRQ_PBA8_PCI0       (IRQ_PBA8_GIC_START + 50)
+#define IRQ_PBA8_PCI1       (IRQ_PBA8_GIC_START + 51)
+#define IRQ_PBA8_PCI2       (IRQ_PBA8_GIC_START + 52)
+#define IRQ_PBA8_PCI3       (IRQ_PBA8_GIC_START + 53)
+
+#define IRQ_PBA8_SMC        -1
+#define IRQ_PBA8_SCTL       -1
+
+#define NR_GIC_PBA8     1
+
+/*
+ * Only define NR_IRQS if less than NR_IRQS_PBA8
+ */
+#define NR_IRQS_PBA8        (IRQ_PBA8_GIC_START + 64)
+
+/* ------------------------------------------------------------------------
+ *  RealView Registers
+ * ------------------------------------------------------------------------
+ *
+ */
+#define REALVIEW_SYS_ID_OFFSET               0x00
+#define REALVIEW_SYS_SW_OFFSET               0x04
+#define REALVIEW_SYS_LED_OFFSET              0x08
+#define REALVIEW_SYS_OSC0_OFFSET             0x0C
+
+#define REALVIEW_SYS_OSC1_OFFSET             0x10
+#define REALVIEW_SYS_OSC2_OFFSET             0x14
+#define REALVIEW_SYS_OSC3_OFFSET             0x18
+#define REALVIEW_SYS_OSC4_OFFSET             0x1C   /* OSC1 for RealView/AB */
+
+#define REALVIEW_SYS_LOCK_OFFSET             0x20
+#define REALVIEW_SYS_100HZ_OFFSET            0x24
+#define REALVIEW_SYS_CFGDATA1_OFFSET         0x28
+#define REALVIEW_SYS_CFGDATA2_OFFSET         0x2C
+#define REALVIEW_SYS_FLAGS_OFFSET            0x30
+#define REALVIEW_SYS_FLAGSSET_OFFSET         0x30
+#define REALVIEW_SYS_FLAGSCLR_OFFSET         0x34
+#define REALVIEW_SYS_NVFLAGS_OFFSET          0x38
+#define REALVIEW_SYS_NVFLAGSSET_OFFSET       0x38
+#define REALVIEW_SYS_NVFLAGSCLR_OFFSET       0x3C
+#define REALVIEW_SYS_RESETCTL_OFFSET         0x40
+#define REALVIEW_SYS_PCICTL_OFFSET           0x44
+#define REALVIEW_SYS_MCI_OFFSET              0x48
+#define REALVIEW_SYS_FLASH_OFFSET            0x4C
+#define REALVIEW_SYS_CLCD_OFFSET             0x50
+#define REALVIEW_SYS_CLCDSER_OFFSET          0x54
+#define REALVIEW_SYS_BOOTCS_OFFSET           0x58
+#define REALVIEW_SYS_24MHz_OFFSET            0x5C
+#define REALVIEW_SYS_MISC_OFFSET             0x60
+#define REALVIEW_SYS_IOSEL_OFFSET            0x70
+#define REALVIEW_SYS_PROCID_OFFSET           0x84
+#define REALVIEW_SYS_TEST_OSC0_OFFSET        0xC0
+#define REALVIEW_SYS_TEST_OSC1_OFFSET        0xC4
+#define REALVIEW_SYS_TEST_OSC2_OFFSET        0xC8
+#define REALVIEW_SYS_TEST_OSC3_OFFSET        0xCC
+#define REALVIEW_SYS_TEST_OSC4_OFFSET        0xD0
+
+#define REALVIEW_SYS_BASE                    0x10000000
+#define REALVIEW_SYS_ID                      (REALVIEW_SYS_BASE + REALVIEW_SYS_ID_OFFSET)
+#define REALVIEW_SYS_SW                      (REALVIEW_SYS_BASE + REALVIEW_SYS_SW_OFFSET)
+#define REALVIEW_SYS_LED                     (REALVIEW_SYS_BASE + REALVIEW_SYS_LED_OFFSET)
+#define REALVIEW_SYS_OSC0                    (REALVIEW_SYS_BASE + REALVIEW_SYS_OSC0_OFFSET)
+#define REALVIEW_SYS_OSC1                    (REALVIEW_SYS_BASE + REALVIEW_SYS_OSC1_OFFSET)
+
+#define REALVIEW_SYS_LOCK                    (REALVIEW_SYS_BASE + REALVIEW_SYS_LOCK_OFFSET)
+#define REALVIEW_SYS_100HZ                   (REALVIEW_SYS_BASE + REALVIEW_SYS_100HZ_OFFSET)
+#define REALVIEW_SYS_CFGDATA1                (REALVIEW_SYS_BASE + REALVIEW_SYS_CFGDATA1_OFFSET)
+#define REALVIEW_SYS_CFGDATA2                (REALVIEW_SYS_BASE + REALVIEW_SYS_CFGDATA2_OFFSET)
+#define REALVIEW_SYS_FLAGS                   (REALVIEW_SYS_BASE + REALVIEW_SYS_FLAGS_OFFSET)
+#define REALVIEW_SYS_FLAGSSET                (REALVIEW_SYS_BASE + REALVIEW_SYS_FLAGSSET_OFFSET)
+#define REALVIEW_SYS_FLAGSCLR                (REALVIEW_SYS_BASE + REALVIEW_SYS_FLAGSCLR_OFFSET)
+#define REALVIEW_SYS_NVFLAGS                 (REALVIEW_SYS_BASE + REALVIEW_SYS_NVFLAGS_OFFSET)
+#define REALVIEW_SYS_NVFLAGSSET              (REALVIEW_SYS_BASE + REALVIEW_SYS_NVFLAGSSET_OFFSET)
+#define REALVIEW_SYS_NVFLAGSCLR              (REALVIEW_SYS_BASE + REALVIEW_SYS_NVFLAGSCLR_OFFSET)
+#define REALVIEW_SYS_RESETCTL                (REALVIEW_SYS_BASE + REALVIEW_SYS_RESETCTL_OFFSET)
+#define REALVIEW_SYS_PCICTL                  (REALVIEW_SYS_BASE + REALVIEW_SYS_PCICTL_OFFSET)
+#define REALVIEW_SYS_MCI                     (REALVIEW_SYS_BASE + REALVIEW_SYS_MCI_OFFSET)
+#define REALVIEW_SYS_FLASH                   (REALVIEW_SYS_BASE + REALVIEW_SYS_FLASH_OFFSET)
+#define REALVIEW_SYS_CLCD                    (REALVIEW_SYS_BASE + REALVIEW_SYS_CLCD_OFFSET)
+#define REALVIEW_SYS_CLCDSER                 (REALVIEW_SYS_BASE + REALVIEW_SYS_CLCDSER_OFFSET)
+#define REALVIEW_SYS_BOOTCS                  (REALVIEW_SYS_BASE + REALVIEW_SYS_BOOTCS_OFFSET)
+#define REALVIEW_SYS_24MHz                   (REALVIEW_SYS_BASE + REALVIEW_SYS_24MHz_OFFSET)
+#define REALVIEW_SYS_MISC                    (REALVIEW_SYS_BASE + REALVIEW_SYS_MISC_OFFSET)
+#define REALVIEW_SYS_IOSEL                   (REALVIEW_SYS_BASE + REALVIEW_SYS_IOSEL_OFFSET)
+#define REALVIEW_SYS_PROCID                  (REALVIEW_SYS_BASE + REALVIEW_SYS_PROCID_OFFSET)
+#define REALVIEW_SYS_TEST_OSC0               (REALVIEW_SYS_BASE + REALVIEW_SYS_TEST_OSC0_OFFSET)
+#define REALVIEW_SYS_TEST_OSC1               (REALVIEW_SYS_BASE + REALVIEW_SYS_TEST_OSC1_OFFSET)
+#define REALVIEW_SYS_TEST_OSC2               (REALVIEW_SYS_BASE + REALVIEW_SYS_TEST_OSC2_OFFSET)
+#define REALVIEW_SYS_TEST_OSC3               (REALVIEW_SYS_BASE + REALVIEW_SYS_TEST_OSC3_OFFSET)
+#define REALVIEW_SYS_TEST_OSC4               (REALVIEW_SYS_BASE + REALVIEW_SYS_TEST_OSC4_OFFSET)
+
+#define REALVIEW_SYS_CTRL_LED         (1 << 0)
+
+/* ------------------------------------------------------------------------
+ *  RealView control registers
+ * ------------------------------------------------------------------------
+ */
+
+/*
+ * REALVIEW_IDFIELD
+ *
+ * 31:24 = manufacturer (0x41 = ARM)
+ * 23:16 = architecture (0x08 = AHB system bus, ASB processor bus)
+ * 15:12 = FPGA (0x3 = XVC600 or XVC600E)
+ * 11:4  = build value
+ * 3:0   = revision number (0x1 = rev B (AHB))
+ */
+
+/*
+ * REALVIEW_SYS_LOCK
+ *     control access to SYS_OSCx, SYS_CFGDATAx, SYS_RESETCTL,
+ *     SYS_CLD, SYS_BOOTCS
+ */
+#define REALVIEW_SYS_LOCK_LOCKED    (1 << 16)
+#define REALVIEW_SYS_LOCKVAL        0xA05F
+#define REALVIEW_SYS_LOCKVAL_MASK   0xFFFF  /* write 0xA05F to enable write access */
+
+/*
+ * REALVIEW_SYS_FLASH
+ */
+#define REALVIEW_FLASHPROG_FLVPPEN  (1 << 0)    /* Enable writing to flash */
+
+/*
+ * REALVIEW_INTREG
+ *     - used to acknowledge and control MMCI and UART interrupts
+ */
+#define REALVIEW_INTREG_WPROT        0x00   /* MMC protection status (no interrupt generated) */
+#define REALVIEW_INTREG_RI0          0x01   /* Ring indicator UART0 is asserted,              */
+#define REALVIEW_INTREG_CARDIN       0x08   /* MMCI card in detect                            */
+/* write 1 to acknowledge and clear               */
+#define REALVIEW_INTREG_RI1          0x02   /* Ring indicator UART1 is asserted,              */
+#define REALVIEW_INTREG_CARDINSERT   0x03   /* Signal insertion of MMC card                   */
+
+/*
+ *  LED settings, bits [7:0]
+ */
+#define REALVIEW_SYS_LED0             (1 << 0)
+#define REALVIEW_SYS_LED1             (1 << 1)
+#define REALVIEW_SYS_LED2             (1 << 2)
+#define REALVIEW_SYS_LED3             (1 << 3)
+#define REALVIEW_SYS_LED4             (1 << 4)
+#define REALVIEW_SYS_LED5             (1 << 5)
+#define REALVIEW_SYS_LED6             (1 << 6)
+#define REALVIEW_SYS_LED7             (1 << 7)
+
+#define ALL_LEDS                  0xFF
+
+#define LED_BANK                  REALVIEW_SYS_LED
+
+/*
+ * Control registers
+ */
+#define REALVIEW_IDFIELD_OFFSET 0x0 /* RealView build information */
+#define REALVIEW_FLASHPROG_OFFSET   0x4 /* Flash devices */
+#define REALVIEW_INTREG_OFFSET      0x8 /* Interrupt control */
+#define REALVIEW_DECODE_OFFSET      0xC /* Fitted logic modules */
+
+/*
+ *  Clean base - dummy
+ *
+ */
+#define CLEAN_BASE                      REALVIEW_BOOT_ROM_HI
+
+/*
+ * System controller bit assignment
+ */
+#define REALVIEW_REFCLK 0
+#define REALVIEW_TIMCLK 1
+
+#define REALVIEW_TIMER1_EnSel   15
+#define REALVIEW_TIMER2_EnSel   17
+#define REALVIEW_TIMER3_EnSel   19
+#define REALVIEW_TIMER4_EnSel   21
+
+struct rt_hw_register
+{
+    unsigned long r0;
+    unsigned long r1;
+    unsigned long r2;
+    unsigned long r3;
+    unsigned long r4;
+    unsigned long r5;
+    unsigned long r6;
+    unsigned long r7;
+    unsigned long r8;
+    unsigned long r9;
+    unsigned long r10;
+    unsigned long fp;
+    unsigned long ip;
+    unsigned long sp;
+    unsigned long lr;
+    unsigned long pc;
+    unsigned long cpsr;
+    unsigned long ORIG_r0;
+};
+
+#include <armv7.h>
+
+/* Interrupt Control Interface */
+#define ARM_GIC_CPU_BASE    0x1E000000
+
+/* number of interrupts on board */
+#define ARM_GIC_NR_IRQS     96
+/* only one GIC available */
+#define ARM_GIC_MAX_NR      1
+
+#endif
+

bsp/qemu-vexpress-a9/drivers/serial.c

+/*
+ *  serial.c UART driver
+ *
+ * COPYRIGHT (C) 2013, Shanghai Real-Thread Technology Co., Ltd
+ *
+ *  This file is part of RT-Thread (http://www.rt-thread.org)
+ *  Maintainer: bernard.xiong <bernard.xiong at gmail.com>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-03-30     Bernard      the first verion
+ */
+
+#include <rthw.h>
+#include <rtdevice.h>
+
+#include "serial.h"
+
+struct hw_uart_device
+{
+    rt_uint32_t hw_base;
+    rt_uint32_t irqno;
+};
+
+#define UART_DR(base)   __REG32(base + 0x00)
+#define UART_FR(base)   __REG32(base + 0x18)
+#define UART_CR(base)   __REG32(base + 0x30)
+#define UART_IMSC(base) __REG32(base + 0x38)
+#define UART_ICR(base)  __REG32(base + 0x44)
+
+#define UARTFR_RXFE     0x10
+#define UARTFR_TXFF     0x20
+#define UARTIMSC_RXIM   0x10
+#define UARTIMSC_TXIM   0x20
+#define UARTICR_RXIC    0x10
+#define UARTICR_TXIC    0x20
+
+static void rt_hw_uart_isr(int irqno, void *param)
+{
+    struct rt_serial_device *serial = (struct rt_serial_device *)param;
+
+    rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
+}
+
+static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
+{
+    return RT_EOK;
+}
+
+static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
+{
+    struct hw_uart_device *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_CLR_INT:
+        /* disable rx irq */
+        UART_IMSC(uart->hw_base) &= ~UARTIMSC_RXIM;
+        break;
+
+    case RT_DEVICE_CTRL_SET_INT:
+        /* enable rx irq */
+        UART_IMSC(uart->hw_base) |= UARTIMSC_RXIM;
+        rt_hw_interrupt_umask(uart->irqno);
+        break;
+    }
+
+    return RT_EOK;
+}
+
+static int uart_putc(struct rt_serial_device *serial, char c)
+{
+    struct hw_uart_device *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+
+    while (UART_FR(uart->hw_base) & UARTFR_TXFF);
+    UART_DR(uart->hw_base) = c;
+
+    return 1;
+}
+
+static int uart_getc(struct rt_serial_device *serial)
+{
+    int ch;
+    struct hw_uart_device *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+
+    ch = -1;
+    if (!(UART_FR(uart->hw_base) & UARTFR_RXFE))
+    {
+        ch = UART_DR(uart->hw_base) & 0xff;
+    }
+
+    return ch;
+}
+
+static const struct rt_uart_ops _uart_ops =
+{
+    uart_configure,
+    uart_control,
+    uart_putc,
+    uart_getc,
+};
+
+#ifdef RT_USING_UART0
+/* UART device driver structure */
+static struct hw_uart_device _uart0_device =
+{
+    REALVIEW_UART0_BASE,
+    IRQ_PBA8_UART0,
+};
+static struct rt_serial_device _serial0;
+#endif
+
+#ifdef RT_USING_UART1
+/* UART1 device driver structure */
+static struct hw_uart_device _uart1_device =
+{
+    REALVIEW_UART1_BASE,
+    IRQ_PBA8_UART1,
+};
+static struct rt_serial_device _serial1;
+#endif
+
+int rt_hw_uart_init(void)
+{
+    struct hw_uart_device *uart;
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+
+#ifdef RT_USING_UART0
+    uart = &_uart0_device;
+
+    _serial0.ops    = &_uart_ops;
+    _serial0.config = config;
+
+    /* register UART1 device */
+    rt_hw_serial_register(&_serial0, "uart0",
+                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+                          uart);
+    rt_hw_interrupt_install(uart->irqno, rt_hw_uart_isr, &_serial0, "uart0");
+    /* enable Rx and Tx of UART */
+    UART_CR(uart->hw_base) = (1 << 0) | (1 << 8) | (1 << 9);
+#endif
+
+#ifdef RT_USING_UART1
+    uart = &_uart1_device;
+    _serial1.ops = &_uart_ops;
+    _serial1.config = config;
+
+    /* register UART1 device */
+    rt_hw_serial_register(&_serial1, "uart1",
+                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX, uart);
+    /* enable Rx and Tx of UART */
+    UART_CR(uart->hw_base) = (1 << 0) | (1 << 8) | (1 << 9);
+    rt_hw_interrupt_install(uart->irqno, rt_hw_uart_isr, &_serial1, "uart1");
+#endif
+
+    return 0;
+}
+INIT_BOARD_EXPORT(rt_hw_uart_init);

bsp/qemu-vexpress-a9/drivers/serial.h

+/*
+ *  UART driver
+ *
+ * COPYRIGHT (C) 2013, Shanghai Real-Thread Technology Co., Ltd
+ *
+ *  This file is part of RT-Thread (http://www.rt-thread.org)
+ *  Maintainer: bernard.xiong <bernard.xiong at gmail.com>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-03-30     Bernard      the first verion
+ */
+
+#ifndef __UART_H__
+#define __UART_H__
+
+#include <board.h>
+
+int rt_hw_uart_init(void);
+
+#endif
+
+

bsp/qemu-vexpress-a9/link.lds

+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+SECTIONS
+{
+    . = 0x60000000;
+
+    __text_start = .;
+    .text :
+    {
+        *(.vectors)
+        *(.text)
+        *(.text.*)
+
+        /* section information for finsh shell */
+        . = ALIGN(4);
+        __fsymtab_start = .;
+        KEEP(*(FSymTab))
+        __fsymtab_end = .;
+        . = ALIGN(4);
+        __vsymtab_start = .;
+        KEEP(*(VSymTab))
+        __vsymtab_end = .;
+        . = ALIGN(4);
+
+        /* section information for modules */
+        . = ALIGN(4);
+        __rtmsymtab_start = .;
+        KEEP(*(RTMSymTab))
+        __rtmsymtab_end = .;
+
+        /* section information for initialization */
+        . = ALIGN(4);
+        __rt_init_start = .;
+        KEEP(*(SORT(.rti_fn*)))
+        __rt_init_end = .;
+    } =0
+    __text_end = .;
+
+    __rodata_start = .;
+    .rodata   : { *(.rodata) *(.rodata.*) }
+    __rodata_end = .;
+
+    . = ALIGN(4);
+    .ctors :
+    {
+        PROVIDE(__ctors_start__ = .);
+        KEEP(*(SORT(.ctors.*)))
+        KEEP(*(.ctors))
+        PROVIDE(__ctors_end__ = .);
+    }
+
+    .dtors :
+    {
+        PROVIDE(__dtors_start__ = .);
+        KEEP(*(SORT(.dtors.*)))
+        KEEP(*(.dtors))
+        PROVIDE(__dtors_end__ = .);
+    }
+
+    __data_start = .;
+    . = ALIGN(4);
+    .data :
+    {
+        *(.data)
+        *(.data.*)
+    }
+    __data_end = .;
+
+    . = ALIGN(4);
+    __bss_start = __data_end;
+    .bss       :
+    {
+    *(.bss)
+    *(.bss.*)
+    *(COMMON)
+    . = ALIGN(4);
+    }
+    . = ALIGN(4);
+    __bss_end = .;
+
+    /* Stabs debugging sections.  */
+    .stab 0 : { *(.stab) }
+    .stabstr 0 : { *(.stabstr) }
+    .stab.excl 0 : { *(.stab.excl) }
+    .stab.exclstr 0 : { *(.stab.exclstr) }
+    .stab.index 0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment 0 : { *(.comment) }
+
+    _end = .;
+}

bsp/qemu-vexpress-a9/qemu.bat

+qemu-system-arm -M vexpress-a9 -kernel rtthread.elf -serial vc -serial vc

bsp/qemu-vexpress-a9/qemu.sh

+qemu-system-arm -M vexpress-a9 -kernel rtthread.elf -serial vc -serial vc

bsp/qemu-vexpress-a9/rtconfig.h

+#ifndef RT_CONFIG_H__
+#define RT_CONFIG_H__
+
+/* Automatically generated file; DO NOT EDIT. */
+/* RT-Thread Project Configuration */
+
+/* RT-Thread Kernel */
+
+#define RT_NAME_MAX 8
+#define RT_ALIGN_SIZE 4
+#define RT_THREAD_PRIORITY_MAX 32
+#define RT_TICK_PER_SECOND 100
+#define RT_DEBUG
+#define RT_USING_OVERFLOW_CHECK
+/* RT_DEBUG_INIT is not set */
+/* RT_DEBUG_THREAD is not set */
+#define RT_USING_HOOK
+/* RT_USING_TIMER_SOFT is not set */
+
+/* Inter-Thread communication */
+
+#define RT_USING_SEMAPHORE
+#define RT_USING_MUTEX
+#define RT_USING_EVENT
+#define RT_USING_MAILBOX
+#define RT_USING_MESSAGEQUEUE
+
+/* Memory Management */
+
+#define RT_USING_MEMPOOL
+#define RT_USING_MEMHEAP
+#define RT_USING_HEAP
+#define RT_USING_SMALL_MEM
+/* RT_USING_SLAB is not set */
+
+/* Kernel Device Object */
+
+#define RT_USING_DEVICE
+#define RT_USING_CONSOLE
+#define RT_CONSOLEBUF_SIZE 128
+#define RT_CONSOLE_DEVICE_NAME "uart0"
+/* RT_USING_MODULE is not set */
+
+/* RT-Thread Components */
+
+#define RT_USING_COMPONENTS_INIT
+#define RT_USING_USER_MAIN
+
+/* C++ features */
+
+/* RT_USING_CPLUSPLUS is not set */
+
+/* Command shell */
+
+#define RT_USING_FINSH
+#define FINSH_USING_SYMTAB
+#define FINSH_USING_DESCRIPTION
+#define FINSH_THREAD_STACK_SIZE 4096
+/* FINSH_USING_AUTH is not set */
+#define FINSH_DEFAULT_PASSWORD "rtthread"
+#define FINSH_USING_MSH
+#define FINSH_USING_MSH_DEFAULT
+/* FINSH_USING_MSH_ONLY is not set */
+
+/* Device virtual file system */
+
+#define RT_USING_DFS
+#define DFS_USING_WORKDIR
+#define DFS_FILESYSTEMS_MAX 2
+#define DFS_FD_MAX 4
+#define RT_USING_DFS_ELMFAT
+#define RT_DFS_ELM_CODE_PAGE 437
+#define RT_DFS_ELM_MAX_LFN 256
+#define RT_DFS_ELM_DRIVES 2
+#define RT_DFS_ELM_MAX_SECTOR_SIZE 512
+/* RT_DFS_ELM_USE_ERASE is not set */
+#define RT_DFS_ELM_REENTRANT
+#define RT_USING_DFS_DEVFS
+/* RT_USING_DFS_NET is not set */
+/* RT_USING_DFS_NFS is not set */
+
+/* Device Drivers */
+
+#define RT_USING_DEVICE_IPC
+#define RT_USING_SERIAL
+/* RT_USING_CAN is not set */
+/* RT_USING_HWTIMER is not set */
+/* RT_USING_I2C is not set */
+#define RT_USING_PIN
+/* RT_USING_MTD_NOR is not set */
+/* RT_USING_MTD_NAND is not set */
+/* RT_USING_RTC is not set */
+/* RT_USING_SDIO is not set */
+/* RT_USING_SPI is not set */
+/* RT_USING_WDT is not set */
+/* RT_USING_USB_HOST is not set */
+/* RT_USING_USB_DEVICE is not set */
+
+/* libc */
+
+#define RT_USING_LIBC
+#define RT_USING_PTHREADS
+
+/* Network stack */
+
+/* light weight TCP/IP stack */
+
+/* RT_USING_LWIP is not set */
+
+/* Modbus master and slave stack */
+
+/* RT_USING_MODBUS is not set */
+
+/* RT-Thread online packages */
+
+/* IoT - internet of things */
+
+/* language packages */
+
+/* miscellaneous packages */
+
+#define PKG_USING_HELLO
+
+/* multimedia packages */
+
+/* security packages */
+
+/* system packages */
+
+/* PKG_USING_CMBACKTRACE is not set */
+#define RT_USING_UART0
+#define RT_USING_UART1
+
+#endif

bsp/qemu-vexpress-a9/rtconfig.py

+import os
+
+# toolchains options
+ARCH='arm'
+CPU='vexpress-a9'
+CROSS_TOOL='gcc'
+
+if os.getenv('RTT_CC'):
+    CROSS_TOOL = os.getenv('RTT_CC')
+
+if  CROSS_TOOL == 'gcc':
+    PLATFORM    = 'gcc'
+    EXEC_PATH   = '/opt/gcc-arm-none-eabi-4_8-2014q1_gri/bin'
+elif CROSS_TOOL == 'keil':
+    PLATFORM    = 'armcc'
+    EXEC_PATH   = 'C:/Keil'
+
+if os.getenv('RTT_EXEC_PATH'):
+    EXEC_PATH = os.getenv('RTT_EXEC_PATH')
+
+BUILD = 'debug'
+
+if PLATFORM == 'gcc':
+    # toolchains
+    PREFIX = 'arm-none-eabi-'
+    CC = PREFIX + 'gcc'
+    CXX = PREFIX + 'g++'
+    AS = PREFIX + 'gcc'
+    AR = PREFIX + 'ar'
+    LINK = PREFIX + 'gcc'
+    TARGET_EXT = 'elf'
+    SIZE = PREFIX + 'size'
+    OBJDUMP = PREFIX + 'objdump'
+    OBJCPY = PREFIX + 'objcopy'
+
+    DEVICE = ' -march=armv7-a -marm -msoft-float'
+    CFLAGS = DEVICE + ' -Wall'
+    AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -D__ASSEMBLY__'
+    LINK_SCRIPT = 'link.lds'
+    LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,system_vectors'+\
+                      ' -T %s' % LINK_SCRIPT
+
+    CPATH = ''
+    LPATH = ''
+
+    # generate debug info in all cases
+    AFLAGS += ' -gdwarf-2'
+    CFLAGS += ' -g -gdwarf-2'
+
+    if BUILD == 'debug':
+        CFLAGS += ' -O0'
+    else:
+        CFLAGS += ' -O2'
+
+    CXXFLAGS = CFLAGS
+
+    POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' +\
+                  SIZE + ' $TARGET \n'
+
+elif PLATFORM == 'armcc':
+    # toolchains
+    CC = 'armcc'
+    CXX = 'armcc'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --device DARMP'
+    CFLAGS = DEVICE + ' --apcs=interwork'
+    AFLAGS = DEVICE
+    LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers --list rtthread.map --scatter rtthread.sct'
+
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/RV31/INC'
+    LFLAGS += ' --libpath ' + EXEC_PATH + '/ARM/RV31/LIB'
+
+    EXEC_PATH += '/arm/bin40/'
+
+    if BUILD == 'debug':
+        CFLAGS += ' -g -O0'
+        AFLAGS += ' -g'
+    else:
+        CFLAGS += ' -O2'
+
+    POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
+
+elif PLATFORM == 'iar':
+    # toolchains
+    CC = 'iccarm'
+    AS = 'iasmarm'
+    AR = 'iarchive'
+    LINK = 'ilinkarm'
+    TARGET_EXT = 'out'
+
+    DEVICE = ' --cpu DARMP'
+
+    CFLAGS = ''
+    AFLAGS = ''
+    LFLAGS = ' --config rtthread.icf'
+
+    EXEC_PATH += '/arm/bin/'
+    RT_USING_MINILIBC = False
+    POST_ACTION = ''