FreeCalypso > hg > freecalypso-sw
view gsm-fw/libiram/bcopy_words.S @ 992:a7b0b426f9ca
target-utils: boot ROM UART autodetection revamped
The new implementation should work with both the familiar Calypso C035
boot ROM version found in our regular targets as well as the older
Calypso F741979B version found on the vintage D-Sample board.
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
---|---|
date | Wed, 30 Dec 2015 21:28:41 +0000 |
parents | cbc49d533b7d |
children |
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/* * bcopy_aligned_words() takes the same arguments as BSD bcopy(), * but requires both addresses and the count to be 32-bit word-aligned, * and assumes that the source and destination memory regions * do not overlap. Furthermore, the count is expected to be non-zero. * * Arguments: * * R0: source address (word-aligned) * R1: destination address (ditto) * R2: byte count (must be a multiple of 4) */ .text .code 32 .globl bcopy_aligned_words bcopy_aligned_words: 1: ldr r3, [r0], #4 str r3, [r1], #4 subs r2, r2, #4 bhi 1b bx lr