diff options
Diffstat (limited to 'core/cortex-m0/init.S')
| -rw-r--r-- | core/cortex-m0/init.S | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/core/cortex-m0/init.S b/core/cortex-m0/init.S deleted file mode 100644 index 5047d18380..0000000000 --- a/core/cortex-m0/init.S +++ /dev/null @@ -1,129 +0,0 @@ -/* Copyright 2014 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - * - * Cortex-M0 CPU initialization - */ - -#include "config.h" - -#ifdef CHIP_FAMILY_STM32F0 -/* Allocate space for SRAM vector table at SRAM based address */ -.section .bss.vector_table -sram_vtable: .skip (48*4) -#endif - -.text -.syntax unified -.code 16 - -.global reset -.thumb_func -reset: - /* - * Ensure we're in privileged mode with main stack. Necessary if - * we've jumped directly here from another image after task_start(). - */ - movs r0, #0 @ priv. mode / main stack / no floating point - msr control, r0 - isb @ ensure the write is done - - /* Clear BSS */ - movs r0, #0 - ldr r1,_bss_start - ldr r2,_bss_end -bss_loop: - str r0, [r1] - adds r1, #4 - cmp r1, r2 - blt bss_loop - -#ifdef CHIP_FAMILY_STM32F0 - /* - * STM32F0 parts don't have the VTOR register for relocating - * the vector table. Instead, we must copy the vector table from - * flash into SRAM. - */ - ldr r1, =vectors - ldr r2, =sram_vtable - movs r0, #0 -vtable_loop: - ldr r3, [r1] - str r3, [r2] - adds r1, #4 - adds r2, #4 - adds r0, #1 - cmp r0, #48 - blt vtable_loop - - /* Set SYSCFG_CFGR1 mem_mode to load vector table from SRAM */ - movs r0, #3 - ldr r1, =0x40010000 - str r0, [r1] -#else - /* Set the vector table on our current code */ - ldr r1, =vectors - ldr r2, =0xE000ED08 /* VTOR register in SCB*/ - str r1, [r2] -#endif - - /* Copy initialized data to Internal RAM */ - ldr r0,_data_lma_start - ldr r1,_data_start - ldr r2,_data_end -data_loop: - ldr r3, [r0] - adds r0, #4 - str r3, [r1] - adds r1, #4 - cmp r1, r2 - blt data_loop - - /* - * Set stack pointer. Already done by Cortex-M hardware, but re-doing - * this here allows software to jump directly to the reset vector. - */ - ldr r0, =stack_end - mov sp, r0 - - /* Jump to C code */ - bl main - - /* That should not return. If it does, loop forever. */ -fini_loop: - b fini_loop - -/* Default exception handler */ -.thumb_func -default_handler: - ldr r0, =exception_panic - bx r0 - -.align 2 -_bss_start: -.long __bss_start -_bss_end: -.long __bss_end -_data_start: -.long __data_start -_data_end: -.long __data_end -_data_lma_start: -.long __data_lma_start - -/* Mock functions to avoid linker complaints */ -.global __aeabi_unwind_cpp_pr0 -.global __aeabi_unwind_cpp_pr1 -.global __aeabi_unwind_cpp_pr2 -__aeabi_unwind_cpp_pr0: -__aeabi_unwind_cpp_pr1: -__aeabi_unwind_cpp_pr2: - bx lr - -/* Reserve space for system stack */ -.section .bss.system_stack -stack_start: -.space CONFIG_STACK_SIZE, 0 -stack_end: -.global stack_end - |