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| author | oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2008-02-28 08:25:46 +0000 |
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| committer | oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60> | 2008-02-28 08:25:46 +0000 |
| commit | d17e1cd93384d56886be7e67cf2b31e97118d811 (patch) | |
| tree | 119eb57a4a078992cf5e79c4f59c410923e39adb /ecosflash/flash.S | |
| parent | 0689e3dd6752f45f493eceb3edf040fbc7849846 (diff) | |
| download | openocd+libswd-d17e1cd93384d56886be7e67cf2b31e97118d811.tar.gz openocd+libswd-d17e1cd93384d56886be7e67cf2b31e97118d811.tar.bz2 openocd+libswd-d17e1cd93384d56886be7e67cf2b31e97118d811.tar.xz openocd+libswd-d17e1cd93384d56886be7e67cf2b31e97118d811.zip | |
eCos flash driver.
git-svn-id: svn://svn.berlios.de/openocd/trunk@365 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Diffstat (limited to 'ecosflash/flash.S')
| -rw-r--r-- | ecosflash/flash.S | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/ecosflash/flash.S b/ecosflash/flash.S new file mode 100644 index 00000000..dc30d163 --- /dev/null +++ b/ecosflash/flash.S @@ -0,0 +1,58 @@ +/* + Jump table for flash driver + + Registers in ARM callling convention is to place args in registers + starting at r0. + + So for: + + void foo(int a, int b, int c). + + a=r0 + b=r1 + c=r2 + + +*/ + .global _stack_base + .global _stack_start + .global _workarea + .global _start + .global _start_bss_clear +_start: + // offset=0 + // int erase(void *address, int len) + ldr sp,=_stack_start + bl erase + nop // Stop CPU here using hw breakpoint + + // offset=0xc + // int program(void *buffer, void *address, int len) + ldr sp,=_stack_start + bl program + nop // Stop CPU here using hw breakpoint + + // offset=0x18 + ldr r0,=_workarea + nop // Stop CPU here using hw breakpoint + + // offset=0x20 + // int init() - returns error message if the flash chip can't be detected + ldr sp,=_stack_start + bl init + nop // Stop CPU here using hw breakpoint + + .section ".bss" + .balign 4 +_stack_base: + .rept 4096 + .byte 0 + .endr +_stack_start: + .balign 4 +_workarea: + .rept 8192 + .byte 0 + .endr + // NB!!! we clear bss while the stack is in use, so we start BSS clearing here !!! :-) +_start_bss_clear: |