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| author | Kevin O'Connor <kevin@koconnor.net> | 2018-08-16 17:03:23 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2018-08-27 08:54:43 -0400 |
| commit | 2b9124f3c09731dbacaf0682f899101b6813a28c (patch) | |
| tree | 98b6e3f8c90c6930e23e011f0146fec228641e06 /lib/bossac/src/WordCopyArm.asm | |
| parent | 79632878ac86c0bf3b9dadb719b54d90742591c5 (diff) | |
| download | kutter-2b9124f3c09731dbacaf0682f899101b6813a28c.tar.gz kutter-2b9124f3c09731dbacaf0682f899101b6813a28c.tar.xz kutter-2b9124f3c09731dbacaf0682f899101b6813a28c.zip | |
lib: Add bossac 1.9 code to lib directory
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'lib/bossac/src/WordCopyArm.asm')
| -rw-r--r-- | lib/bossac/src/WordCopyArm.asm | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/lib/bossac/src/WordCopyArm.asm b/lib/bossac/src/WordCopyArm.asm new file mode 100644 index 00000000..b9f291d0 --- /dev/null +++ b/lib/bossac/src/WordCopyArm.asm @@ -0,0 +1,47 @@ + .global start + .global stack + .global reset + .global dst_addr + .global src_addr + .global words + + .text + .thumb + .align 0 + +start: + ldr r0, dst_addr + ldr r1, src_addr + ldr r2, words + b check + +copy: + ldmia r1!, {r3} + stmia r0!, {r3} + sub r2, #1 + +check: + cmp r2, #0 + bne copy + + @ Fix for SAM-BA stack bug + ldr r0, reset + cmp r0, #0 + bne return + ldr r0, stack + mov sp, r0 + +return: + bx lr + + .align 0 +stack: + .word 0 +reset: + .word 0 +dst_addr: + .word 0 +src_addr: + .word 0 +words: + .word 0 |