port lpc176x for IAR

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1215 bbd45198-f89e-11dd-88c7-29a3b14d5316

libcpu/arm/lpc17xx/context_iar.S

+;/*
+; * File      : context_iar.S
+; * 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
+; * 2009-01-17     Bernard      first version
+; * 2010-02-04     Magicoe      Edit for LPC17xx Series
+; * 2010-12-20     aozima       edit for IAR
+; */
+
+;/**
+; * @addtogroup LPC17
+; */
+;/*@{*/
+
+NVIC_INT_CTRL   EQU     0xE000ED04               ; interrupt control state register
+NVIC_SYSPRI2    EQU     0xE000ED20               ; system priority register (2)
+NVIC_PENDSV_PRI EQU     0x00FF0000               ; PendSV priority value (lowest)
+NVIC_PENDSVSET  EQU     0x10000000               ; value to trigger PendSV exception
+
+	SECTION .text:CODE(2)
+	THUMB
+	REQUIRE8
+	PRESERVE8
+
+	IMPORT rt_thread_switch_interrput_flag
+	IMPORT rt_interrupt_from_thread
+	IMPORT rt_interrupt_to_thread
+
+;/*
+; * rt_base_t rt_hw_interrupt_disable();
+; */
+	EXPORT  rt_hw_interrupt_disable
+rt_hw_interrupt_disable:
+	MRS		r0, PRIMASK
+	CPSID   I
+	BX		LR
+
+;/*
+; * void rt_hw_interrupt_enable(rt_base_t level);
+; */
+	EXPORT  rt_hw_interrupt_enable
+rt_hw_interrupt_enable:
+	MSR		PRIMASK, r0
+	BX      LR
+
+;/*
+; * void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
+; * r0 --> from
+; * r1 --> to
+; */
+	EXPORT rt_hw_context_switch_interrupt
+	EXPORT rt_hw_context_switch
+
+rt_hw_context_switch_interrupt:
+rt_hw_context_switch:
+
+	; set rt_thread_switch_interrput_flag to 1
+	LDR 	r2, =rt_thread_switch_interrput_flag
+	LDR 	r3, [r2]
+	CMP 	r3, #1
+	BEQ 	_reswitch
+	MOV 	r3, #1
+	STR 	r3, [r2]
+
+	LDR 	r2, =rt_interrupt_from_thread	; set rt_interrupt_from_thread
+	STR 	r0, [r2]
+
+_reswitch
+	LDR 	r2, =rt_interrupt_to_thread		; set rt_interrupt_to_thread
+	STR 	r1, [r2]
+
+    LDR     r0, =NVIC_INT_CTRL      		; trigger the PendSV exception (causes context switch)
+    LDR     r1, =NVIC_PENDSVSET
+	STR     r1, [r0]
+	BX      LR
+
+; r0 --> swith from thread stack
+; r1 --> swith to thread stack
+; psr, pc, lr, r12, r3, r2, r1, r0 are pushed into [from] stack
+	EXPORT rt_hw_pend_sv
+rt_hw_pend_sv:
+
+	; disable interrupt to protect context switch
+	MRS		r2, PRIMASK
+	CPSID   I
+
+	; get rt_thread_switch_interrupt_flag
+	LDR		r0, =rt_thread_switch_interrput_flag
+	LDR		r1, [r0]
+	CBZ		r1, pendsv_exit			; pendsv already handled
+
+	; clear rt_thread_switch_interrput_flag to 0
+	MOV		r1, #0x00
+	STR		r1, [r0]
+
+	LDR		r0, =rt_interrupt_from_thread
+	LDR		r1, [r0]
+	CBZ		r1, swtich_to_thread    ; skip register save at the first time
+
+	MRS     r1, psp                 ; get from thread stack pointer
+	STMFD	r1!, {r4 - r11}			; push r4 - r11 register
+	LDR		r0, [r0]
+	STR		r1, [r0]				; update from thread stack pointer
+
+swtich_to_thread
+	LDR		r1, =rt_interrupt_to_thread
+	LDR		r1, [r1]
+	LDR		r1, [r1]				; load thread stack pointer
+
+	LDMFD	r1!, {r4 - r11}			; pop r4 - r11 register
+	MSR		psp, r1					; update stack pointer
+
+pendsv_exit
+	; restore interrupt
+	MSR		PRIMASK, r2
+
+	ORR     lr, lr, #0x04
+	BX		lr
+
+;/*
+; * void rt_hw_context_switch_to(rt_uint32 to);
+; * r0 --> to
+; * this fucntion is used to perform the first thread switch
+; */
+	EXPORT rt_hw_context_switch_to
+rt_hw_context_switch_to:
+	; set to thread
+	LDR		r1, =rt_interrupt_to_thread
+	STR		r0, [r1]
+
+	; set from thread to 0
+	LDR		r1, =rt_interrupt_from_thread
+	MOV		r0, #0x0
+	STR		r0, [r1]
+
+	; set interrupt flag to 1
+	LDR 	r1, =rt_thread_switch_interrput_flag
+	MOV 	r0, #1
+	STR 	r0, [r1]
+
+	; set the PendSV exception priority
+    LDR     r0, =NVIC_SYSPRI2
+    LDR     r1, =NVIC_PENDSV_PRI
+    STR     r1, [r0]
+
+	; trigger the PendSV exception (causes context switch)
+    LDR     r0, =NVIC_INT_CTRL
+    LDR     r1, =NVIC_PENDSVSET
+    STR     r1, [r0]
+
+	; enable interrupts at processor level
+    CPSIE   I
+
+	; never reach here!
+
+; compatible with old version
+	EXPORT rt_hw_interrupt_thread_switch
+rt_hw_interrupt_thread_switch:
+	BX		lr
+
+	END

libcpu/arm/lpc17xx/fault_iar.S

+;/*
+; * File      : fault_iar.S
+; * 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
+; * 2009-01-17     Bernard      first version
+; * 2010-12-20     aozima       edit for IAR
+; */
+
+    SECTION .text:CODE(2)
+    THUMB
+    REQUIRE8
+    PRESERVE8
+
+    IMPORT rt_hw_hard_fault_exception
+
+    EXPORT rt_hw_hard_fault
+rt_hw_hard_fault:
+
+    ; get current context
+    MRS     r0, psp                 ; get fault thread stack pointer
+    PUSH    {lr}
+    BL      rt_hw_hard_fault_exception
+    POP     {lr}
+
+    ORR     lr, lr, #0x04
+    BX      lr
+
+    END

libcpu/arm/lpc17xx/start_iar.S

+;/*****************************************************************************
+; * @file:    start_iar.S
+; * @purpose: CMSIS Cortex-M3 Core Device Startup File
+; *           for the NXP LPC17xx Device Series
+; * @version: V1.02
+; * @date:    31. July 2009
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (C) 2009 ARM Limited. All rights reserved.
+; *
+; * ARM Limited (ARM) is supplying this software for use with Cortex-Mx
+; * processor based microcontrollers.  This file can be freely distributed
+; * within development tools that are supporting such ARM based processors.
+; *
+; * THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
+; * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
+; * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
+; * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
+; * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
+; *
+; ******************************************************************************/
+
+
+;
+; The modules in this file are included in the libraries, and may be replaced
+; by any user-defined modules that define the PUBLIC symbol _program_start or
+; a user defined start symbol.
+; To override the cstartup defined in the library, simply add your modified
+; version to the workbench project.
+;
+; The vector table is normally located at address 0.
+; When debugging in RAM, it can be located in RAM, aligned to at least 2^6.
+; The name "__vector_table" has special meaning for C-SPY:
+; it is where the SP start value is found, and the NVIC vector
+; table register (VTOR) is initialized to this address if != 0.
+;
+; Cortex-M version
+;
+
+        MODULE  ?cstartup
+
+        ;; Forward declaration of sections.
+        SECTION CSTACK:DATA:NOROOT(3)
+
+        SECTION .intvec:CODE:NOROOT(2)
+
+        IMPORT  rt_hw_hard_fault
+        IMPORT  rt_hw_pend_sv
+        IMPORT  rt_hw_timer_handler
+
+        EXTERN  __iar_program_start
+        EXTERN  SystemInit
+        PUBLIC  __vector_table
+        PUBLIC  __vector_table_0x1c
+        PUBLIC  __Vectors
+        PUBLIC  __Vectors_End
+        PUBLIC  __Vectors_Size
+
+        DATA
+
+__vector_table
+        DCD     sfe(CSTACK)
+        DCD     Reset_Handler
+
+        DCD     NMI_Handler
+        DCD     rt_hw_hard_fault
+        DCD     MemManage_Handler
+        DCD     BusFault_Handler
+        DCD     UsageFault_Handler
+__vector_table_0x1c
+        DCD     0
+        DCD     0
+        DCD     0
+        DCD     0
+        DCD     SVC_Handler
+        DCD     DebugMon_Handler
+        DCD     0
+        DCD     rt_hw_pend_sv
+        DCD     rt_hw_timer_handler
+
+        ; External Interrupts
+        DCD     WDT_IRQHandler            ; 16: Watchdog Timer
+        DCD     TIMER0_IRQHandler         ; 17: Timer0
+        DCD     TIMER1_IRQHandler         ; 18: Timer1
+        DCD     TIMER2_IRQHandler         ; 19: Timer2
+        DCD     TIMER3_IRQHandler         ; 20: Timer3
+        DCD     UART0_IRQHandler          ; 21: UART0
+        DCD     UART1_IRQHandler          ; 22: UART1
+        DCD     UART2_IRQHandler          ; 23: UART2
+        DCD     UART3_IRQHandler          ; 24: UART3
+        DCD     PWM1_IRQHandler           ; 25: PWM1
+        DCD     I2C0_IRQHandler           ; 26: I2C0
+        DCD     I2C1_IRQHandler           ; 27: I2C1
+        DCD     I2C2_IRQHandler           ; 28: I2C2
+        DCD     SPI_IRQHandler            ; 29: SPI
+        DCD     SSP0_IRQHandler           ; 30: SSP0
+        DCD     SSP1_IRQHandler           ; 31: SSP1
+        DCD     PLL0_IRQHandler           ; 32: PLL0 Lock (Main PLL)
+        DCD     RTC_IRQHandler            ; 33: Real Time Clock
+        DCD     EINT0_IRQHandler          ; 34: External Interrupt 0
+        DCD     EINT1_IRQHandler          ; 35: External Interrupt 1
+        DCD     EINT2_IRQHandler          ; 36: External Interrupt 2
+        DCD     EINT3_IRQHandler          ; 37: External Interrupt 3
+        DCD     ADC_IRQHandler            ; 38: A/D Converter
+        DCD     BOD_IRQHandler            ; 39: Brown-Out Detect
+        DCD     USB_IRQHandler            ; 40: USB
+        DCD     CAN_IRQHandler            ; 41: CAN
+        DCD     DMA_IRQHandler            ; 42: General Purpose DMA
+        DCD     I2S_IRQHandler            ; 43: I2S
+        DCD     ENET_IRQHandler           ; 44: Ethernet
+        DCD     RIT_IRQHandler            ; 45: Repetitive Interrupt Timer
+        DCD     MCPWM_IRQHandler          ; 46: Motor Control PWM
+        DCD     QEI_IRQHandler            ; 47: Quadrature Encoder Interface
+        DCD     PLL1_IRQHandler           ; 48: PLL1 Lock (USB PLL)
+__Vectors_End
+
+__Vectors       EQU   __vector_table
+__Vectors_Size 	EQU 	__Vectors_End - __Vectors
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+;; Default interrupt handlers.
+;;
+        THUMB
+
+        PUBWEAK Reset_Handler
+        SECTION .text:CODE:REORDER(2)
+Reset_Handler
+        LDR     R0, =SystemInit
+        BLX     R0
+        LDR     R0, =__iar_program_start
+        BX      R0
+
+        PUBWEAK NMI_Handler
+        SECTION .text:CODE:REORDER(1)
+NMI_Handler
+        B NMI_Handler
+
+        PUBWEAK HardFault_Handler
+        SECTION .text:CODE:REORDER(1)
+HardFault_Handler
+        B HardFault_Handler
+
+        PUBWEAK MemManage_Handler
+        SECTION .text:CODE:REORDER(1)
+MemManage_Handler
+        B MemManage_Handler
+
+        PUBWEAK BusFault_Handler
+        SECTION .text:CODE:REORDER(1)
+BusFault_Handler
+        B BusFault_Handler
+
+        PUBWEAK UsageFault_Handler
+        SECTION .text:CODE:REORDER(1)
+UsageFault_Handler
+        B UsageFault_Handler
+
+        PUBWEAK SVC_Handler
+        SECTION .text:CODE:REORDER(1)
+SVC_Handler
+        B SVC_Handler
+
+        PUBWEAK DebugMon_Handler
+        SECTION .text:CODE:REORDER(1)
+DebugMon_Handler
+        B DebugMon_Handler
+
+        PUBWEAK PendSV_Handler
+        SECTION .text:CODE:REORDER(1)
+PendSV_Handler
+        B PendSV_Handler
+
+        PUBWEAK SysTick_Handler
+        SECTION .text:CODE:REORDER(1)
+SysTick_Handler
+        B SysTick_Handler
+
+        PUBWEAK WDT_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+WDT_IRQHandler
+        B WDT_IRQHandler
+
+        PUBWEAK TIMER0_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+TIMER0_IRQHandler
+        B TIMER0_IRQHandler
+
+        PUBWEAK TIMER1_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+TIMER1_IRQHandler
+        B TIMER1_IRQHandler
+
+        PUBWEAK TIMER2_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+TIMER2_IRQHandler
+        B TIMER2_IRQHandler
+
+        PUBWEAK TIMER3_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+TIMER3_IRQHandler
+        B TIMER3_IRQHandler
+
+        PUBWEAK UART0_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+UART0_IRQHandler
+        B UART0_IRQHandler
+
+        PUBWEAK UART1_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+UART1_IRQHandler
+        B UART1_IRQHandler
+
+        PUBWEAK UART2_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+UART2_IRQHandler
+        B UART2_IRQHandler
+
+        PUBWEAK UART3_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+UART3_IRQHandler
+        B UART3_IRQHandler
+
+        PUBWEAK PWM1_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+PWM1_IRQHandler
+        B PWM1_IRQHandler
+
+        PUBWEAK I2C0_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+I2C0_IRQHandler
+        B I2C0_IRQHandler
+
+        PUBWEAK I2C1_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+I2C1_IRQHandler
+        B I2C1_IRQHandler
+
+        PUBWEAK I2C2_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+I2C2_IRQHandler
+        B I2C2_IRQHandler
+
+        PUBWEAK SPI_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+SPI_IRQHandler
+        B SPI_IRQHandler
+
+        PUBWEAK SSP0_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+SSP0_IRQHandler
+        B SSP0_IRQHandler
+
+        PUBWEAK SSP1_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+SSP1_IRQHandler
+        B SSP1_IRQHandler
+
+        PUBWEAK PLL0_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+PLL0_IRQHandler
+        B PLL0_IRQHandler
+
+        PUBWEAK RTC_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+RTC_IRQHandler
+        B RTC_IRQHandler
+
+        PUBWEAK EINT0_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+EINT0_IRQHandler
+        B EINT0_IRQHandler
+
+        PUBWEAK EINT1_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+EINT1_IRQHandler
+        B EINT1_IRQHandler
+
+        PUBWEAK EINT2_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+EINT2_IRQHandler
+        B EINT2_IRQHandler
+
+        PUBWEAK EINT3_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+EINT3_IRQHandler
+        B EINT3_IRQHandler
+
+        PUBWEAK ADC_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+ADC_IRQHandler
+        B ADC_IRQHandler
+
+        PUBWEAK BOD_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+BOD_IRQHandler
+        B BOD_IRQHandler
+
+        PUBWEAK USB_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+USB_IRQHandler
+        B USB_IRQHandler
+
+        PUBWEAK CAN_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+CAN_IRQHandler
+        B CAN_IRQHandler
+
+        PUBWEAK DMA_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+DMA_IRQHandler
+        B DMA_IRQHandler
+
+        PUBWEAK I2S_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+I2S_IRQHandler
+        B I2S_IRQHandler
+
+        PUBWEAK ENET_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+ENET_IRQHandler
+        B ENET_IRQHandler
+
+        PUBWEAK RIT_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+RIT_IRQHandler
+        B RIT_IRQHandler
+
+        PUBWEAK MCPWM_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+MCPWM_IRQHandler
+        B MCPWM_IRQHandler
+
+        PUBWEAK QEI_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+QEI_IRQHandler
+        B QEI_IRQHandler
+
+        PUBWEAK PLL1_IRQHandler
+        SECTION .text:CODE:REORDER(1)
+PLL1_IRQHandler
+        B PLL1_IRQHandler
+
+        END