From 02564df01e8bf28dcdd0f664ce010890d4eb3aa3 Mon Sep 17 00:00:00 2001 From: dzzxzz Date: Wed, 14 Apr 2010 00:21:14 +0000 Subject: [PATCH] port rt-thread to M16C git-svn-id: https://rt-thread.googlecode.com/svn/trunk@619 bbd45198-f89e-11dd-88c7-29a3b14d5316 --- libcpu/m16c/context.asm | 117 ++++++++++++++++++++++++++++++++++++++++ libcpu/m16c/interrupt.c | 22 ++++++++ libcpu/m16c/stack.c | 59 ++++++++++++++++++++ 3 files changed, 198 insertions(+) create mode 100644 libcpu/m16c/context.asm create mode 100644 libcpu/m16c/interrupt.c create mode 100644 libcpu/m16c/stack.c diff --git a/libcpu/m16c/context.asm b/libcpu/m16c/context.asm new file mode 100644 index 000000000..6a1c1e149 --- /dev/null +++ b/libcpu/m16c/context.asm @@ -0,0 +1,117 @@ +/* + * File : context.asm + * This file is part of RT-Thread RTOS + * COPYRIGHT (C) 2009, 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 + * 2010-04-09 fify the first version + * + * For : Renesas M16C + * Toolchain : IAR's EW for M16C v3.401 +*/ + +;******************************************************************************************************** +; PUBLIC FUNCTIONS +;******************************************************************************************************** + + RSEG CSTACK + + RSEG ISTACK + + RSEG CODE(1) + + EXTERN rt_thread_switch_interrput_flag + EXTERN rt_interrupt_from_thread + EXTERN rt_interrupt_to_thread + EXTERN rt_interrupt_enter + EXTERN rt_tick_increase + EXTERN rt_interrupt_leave + EXTERN u0rec_handler + + PUBLIC rt_hw_interrupt_disable + PUBLIC rt_hw_interrupt_enable + PUBLIC rt_hw_context_switch_to + PUBLIC rt_hw_context_switch + PUBLIC rt_hw_context_switch_interrupt + PUBLIC rt_hw_timer_handler + PUBLIC rt_hw_uart0_receive_handler + +rt_hw_interrupt_disable + FCLR I + RTS + +rt_hw_interrupt_enable + FSET I + RTS + +;/* +; * void rt_hw_context_switch_to(rt_uint32 to); +; * r0 --> to +; * this fucntion is used to perform the first thread switch +; */ +rt_hw_context_switch_to + MOV.W R0, A0 + LDC [A0], ISP + POPM R0,R1,R2,R3,A0,A1,SB,FB + REIT + +rt_hw_context_switch + PUSHM R0,R1,R2,R3,A0,A1,SB,FB + MOV.W R0, A0 + STC ISP, [A0] + MOV.W R1, A0 + LDC [A0], ISP + POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore all processor registers from the new task's stack + REIT + +rt_hw_context_switch_interrupt + CMP.W #1,rt_thread_switch_interrput_flag + JEQ jump + MOV.W #1,rt_thread_switch_interrput_flag + MOV.W R0, rt_interrupt_from_thread +jump + MOV.W R1, rt_interrupt_to_thread + RTS + +rt_hw_context_switch_interrupt_do + MOV.W #0, rt_thread_switch_interrput_flag + MOV.W rt_interrupt_from_thread, A0 + STC ISP, [A0] + + MOV.W rt_interrupt_to_thread, A0 + LDC [A0], ISP + POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore all processor registers from the new task's stack + RTS ; Normal return + + .EVEN +rt_hw_timer_handler: + PUSHM R0,R1,R2,R3,A0,A1,SB,FB ; Save current task's registers + JSR rt_interrupt_enter + JSR rt_tick_increase + JSR rt_interrupt_leave + + CMP.W #1,rt_thread_switch_interrput_flag + JEQ rt_hw_context_switch_interrupt_do + + POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore registers from the new task's stack + REIT ; Return from interrup + + .EVEN +rt_hw_uart0_receive_handler: + PUSHM R0,R1,R2,R3,A0,A1,SB,FB ; Save current task's registers + JSR rt_interrupt_enter + JSR u0rec_handler + JSR rt_interrupt_leave + + CMP.W #1, rt_thread_switch_interrput_flag + JEQ rt_hw_context_switch_interrupt_do + + POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore registers from the new task's stack + REIT ; Return from interrup + + END diff --git a/libcpu/m16c/interrupt.c b/libcpu/m16c/interrupt.c new file mode 100644 index 000000000..5c9003007 --- /dev/null +++ b/libcpu/m16c/interrupt.c @@ -0,0 +1,22 @@ +/* + * File : interrupt.c + * This file is part of RT-Thread RTOS + * COPYRIGHT (C) 2009, 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 + * 2010-04-09 fify the first version + * + * For : Renesas M16C + * Toolchain : IAR's EW for M16C v3.401 +*/ + +#include + +rt_uint16_t rt_interrupt_from_thread; +rt_uint16_t rt_interrupt_to_thread; +rt_uint16_t rt_thread_switch_interrput_flag; \ No newline at end of file diff --git a/libcpu/m16c/stack.c b/libcpu/m16c/stack.c new file mode 100644 index 000000000..ae6bc8aa4 --- /dev/null +++ b/libcpu/m16c/stack.c @@ -0,0 +1,59 @@ +/* + * File : stack.c + * This file is part of RT-Thread RTOS + * COPYRIGHT (C) 2009, 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 + * 2010-04-09 fify the first version + * + * For : Renesas M16C + * Toolchain : IAR's EW for M16C v3.401 +*/ + +#include + +/** + * 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_uint16_t *pstk16; + rt_uint16_t flag; + + + flag = 0x0040; + pstk16 = (rt_uint16_t *)stack_addr; + pstk16--; + + /* Simulate ISR entry */ + *pstk16-- = (flag & 0x00FF) /* ... The lowest byte of the FLAG register */ + | (((rt_uint32_t)tentry >> 8) & 0x00000F00) /* ... The highest nibble of the PC register */ + | ((flag << 4) & 0xF000); /* ... The highest nibble of the FLAG register */ + *pstk16-- = (((rt_uint32_t)tentry ) & 0x0000FFFF); /* ... The lowest bytes of the PC register */ + + /* Save registers onto stack frame */ + *pstk16-- = (rt_uint16_t)0xFBFB; /* ... FB register */ + *pstk16-- = (rt_uint16_t)0x3B3B; /* ... SB register */ + *pstk16-- = (rt_uint16_t)0xA1A1; /* ... A1 register */ + *pstk16-- = (rt_uint16_t)0xA0A0; /* ... A0 register */ + *pstk16-- = (rt_uint16_t)0x3333; /* ... R3 register */ + *pstk16-- = (rt_uint32_t)parameter >> 16L; /* ... Pass argument in R2 register */ + *pstk16-- = (rt_uint32_t)parameter & 0x0000FFFFL; /* ... Pass argument in R1 register */ + *pstk16 = (rt_uint16_t)0x0000; /* ... R0 register */ + + /* return task's current stack address */ + return (rt_uint8_t *)pstk16; +} -- GitLab