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| author | Marti Bolivar <mbolivar@leaflabs.com> | 2011-05-09 16:43:27 -0400 |
|---|---|---|
| committer | Marti Bolivar <mbolivar@leaflabs.com> | 2011-05-09 16:49:08 -0400 |
| commit | 19ea6ba4ea3f1ecb9830cf4d3e1366513f4f96e3 (patch) | |
| tree | a43f7e0fb3650ca54f245b750a078a0e8c356504 /libmaple/exc.S | |
| parent | 868fb1c273e562a1140abfa948022c9d4f55bccf (diff) | |
| parent | 1e2e177f6dae62e040c674b617744c73be187062 (diff) | |
| download | librambutan-19ea6ba4ea3f1ecb9830cf4d3e1366513f4f96e3.tar.gz librambutan-19ea6ba4ea3f1ecb9830cf4d3e1366513f4f96e3.zip | |
Merge branch 'refactor'
This merges the libmaple refactor work into master. The contents of
libmaple proper (/libmaple/) are almost completely incompatible with
previous APIs in master. See /docs/source/libmaple/overview.rst for
more information on the new design.
Wirish incompatibilities are limited to the HardwareTimer class;
however, there are several new deprecations, most likely to be removed
in 0.1.0.
Diffstat (limited to 'libmaple/exc.S')
| -rw-r--r-- | libmaple/exc.S | 70 |
1 files changed, 55 insertions, 15 deletions
diff --git a/libmaple/exc.S b/libmaple/exc.S index a9f6561..7631e48 100644 --- a/libmaple/exc.S +++ b/libmaple/exc.S @@ -41,21 +41,61 @@ # SP--> r0 .text -.globl HardFaultException +.globl __exc_hardfault +.globl __exc_nmi +.globl __exc_hardfault +.globl __exc_memmanage +.globl __exc_busfault +.globl __exc_usagefault + +.code 16 +.thumb_func +__exc_nmi: + mov r0, #1 + b __default_exc + +.thumb_func +__exc_hardfault: + mov r0, #2 + b __default_exc + +.thumb_func +__exc_memmanage: + mov r0, #3 + b __default_exc + +.thumb_func +__exc_busfault: + mov r0, #4 + b __default_exc + +.thumb_func +__exc_usagefault: + mov r0, #5 + b __default_exc + .thumb_func -HardFaultException: - ldr r0, CPSR_MASK @ Set default CPSR - push {r0} - ldr r0, TARGET_PC @ Set target pc - push {r0} - sub sp, sp, #24 @ its not like i even care - ldr r0, EXC_RETURN @ Return to thread mode - mov lr, r0 - bx lr @ Exception exit - - .align 4 - CPSR_MASK: .word 0x61000000 - EXC_RETURN: .word 0xFFFFFFF9 - TARGET_PC: .word throb +__default_exc: + ldr r2, NVIC_CCR @ Enable returning to thread mode even if there are + mov r1 ,#1 @ pending exceptions. See flag NONEBASETHRDENA. + str r1, [r2] + cpsid i @ Disable global interrupts + ldr r2, SYSTICK_CSR @ Disable systick handler + mov r1, #0 + str r1, [r2] + ldr r1, CPSR_MASK @ Set default CPSR + push {r1} + ldr r1, TARGET_PC @ Set target pc + push {r1} + sub sp, sp, #24 @ Don't care + ldr r1, EXC_RETURN @ Return to thread mode + mov lr, r1 + bx lr @ Exception exit +.align 4 +CPSR_MASK: .word 0x61000000 +EXC_RETURN: .word 0xFFFFFFF9 +TARGET_PC: .word __error +NVIC_CCR: .word 0xE000ED14 @ NVIC configuration control register +SYSTICK_CSR: .word 0xE000E010 @ Systick control register |