diff options
| -rw-r--r-- | ports/ARM7-AT91SAM7X/crt0.s | 172 | ||||
| -rw-r--r-- | readme.txt | 5 |
2 files changed, 5 insertions, 172 deletions
diff --git a/ports/ARM7-AT91SAM7X/crt0.s b/ports/ARM7-AT91SAM7X/crt0.s deleted file mode 100644 index dcee3587c..000000000 --- a/ports/ARM7-AT91SAM7X/crt0.s +++ /dev/null @@ -1,172 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
-
- This file is part of ChibiOS/RT.
-
- ChibiOS/RT 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 3 of the License, or
- (at your option) any later version.
-
- ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
-*/
-
-/*
- * Generic ARM startup file for ChibiOS/RT (Atmel variant).
- */
-
-.set MODE_USR, 0x10
-.set MODE_FIQ, 0x11
-.set MODE_IRQ, 0x12
-.set MODE_SVC, 0x13
-.set MODE_ABT, 0x17
-.set MODE_UND, 0x1B
-.set MODE_SYS, 0x1F
-
-.equ I_BIT, 0x80
-.equ F_BIT, 0x40
-
-.section .startup
-.code 32
-.balign 4
-/*
- * System entry points.
- */
-_start:
- ldr pc, _reset
- ldr pc, _undefined
- ldr pc, _swi
- ldr pc, _prefetch
- ldr pc, _abort
- nop
- ldr pc, [pc,#-0xF20] /* AIC - AIC_IVR */
- ldr pc, [pc,#-0xF20] /* AIC - AIC_FVR */
-
-_reset:
- .word ResetHandler
-_undefined:
- .word UndHandler
-_swi:
- .word SwiHandler
-_prefetch:
- .word PrefetchHandler
-_abort:
- .word AbortHandler
-_fiq:
- .word FiqHandler
- .word 0
- .word 0
-
-/*
- * Reset handler.
- */
-.text
-ResetHandler:
- /*
- * Stack pointers initialization.
- */
- ldr r0, =__ram_end__
- /* Undefined */
- msr CPSR_c, #MODE_UND | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__und_stack_size__
- sub r0, r0, r1
- /* Abort */
- msr CPSR_c, #MODE_ABT | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__abt_stack_size__
- sub r0, r0, r1
- /* FIQ */
- msr CPSR_c, #MODE_FIQ | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__fiq_stack_size__
- sub r0, r0, r1
- /* IRQ */
- msr CPSR_c, #MODE_IRQ | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__irq_stack_size__
- sub r0, r0, r1
- /* Supervisor */
- msr CPSR_c, #MODE_SVC | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__svc_stack_size__
- sub r0, r0, r1
- /* System */
- msr CPSR_c, #MODE_SYS | I_BIT | F_BIT
- mov sp, r0
-// ldr r1, =__sys_stack_size__
-// sub r0, r0, r1
- /*
- * Data initialization.
- * NOTE: It assumes that the DATA size is a multiple of 4.
- */
- ldr r1, =_textdata
- ldr r2, =_data
- ldr r3, =_edata
-dataloop:
- cmp r2, r3
- ldrlo r0, [r1], #4
- strlo r0, [r2], #4
- blo dataloop
- /*
- * BSS initialization.
- * NOTE: It assumes that the BSS size is a multiple of 4.
- */
- mov r0, #0
- ldr r1, =_bss_start
- ldr r2, =_bss_end
-bssloop:
- cmp r1, r2
- strlo r0, [r1], #4
- blo bssloop
- /*
- * Application-provided HW initialization routine.
- */
-#ifndef THUMB_NO_INTERWORKING
- bl hwinit
- /*
- * main(0, NULL).
- */
- mov r0, #0
- mov r1, r0
- bl main
- bl chSysHalt
-#else
- add r0, pc, #1
- bx r0
-.code 16
- bl hwinit
- mov r0, #0
- mov r1, r0
- bl main
- bl chSysHalt
-.code 32
-#endif
-
-.weak UndHandler
-.globl UndHandler
-UndHandler:
-
-.weak SwiHandler
-.globl SwiHandler
-SwiHandler:
-
-.weak PrefetchHandler
-.globl PrefetchHandler
-PrefetchHandler:
-
-.weak AbortHandler
-.globl AbortHandler
-AbortHandler:
-
-.weak FiqHandler
-.globl FiqHandler
-FiqHandler:
-
-.loop: b .loop
diff --git a/readme.txt b/readme.txt index 12d951d58..d49442790 100644 --- a/readme.txt +++ b/readme.txt @@ -79,6 +79,11 @@ Win32-MinGW - ChibiOS/RT simulator and demo into a WIN32 process, initializaiton phase: hwinit0, the late initialization phase is now named
hwinit1. The demo now initializes the PLL before initializing the BSS and
DATA segments, this greatly optimizes the system start up time.
+- NEW: Unified ARM7 startup file, it is shared by the LPC and SAM7 demo
+ projects. The new startup file implements early and late initialization
+ phases as described above for the CM3 startup file.
+ The architecture specific vector tables are now encapsulated into the
+ vectors.s file.
- Modified the STM32 demo makefile to use the latest YAGARTO toolchain as
default (arm-elf-gcc).
|