From 2b9124f3c09731dbacaf0682f899101b6813a28c Mon Sep 17 00:00:00 2001 From: Kevin O'Connor Date: Thu, 16 Aug 2018 17:03:23 -0400 Subject: lib: Add bossac 1.9 code to lib directory Signed-off-by: Kevin O'Connor --- lib/bossac/src/WordCopyArm.asm | 47 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 lib/bossac/src/WordCopyArm.asm (limited to 'lib/bossac/src/WordCopyArm.asm') 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 -- cgit v1.2.3-70-g09d2