FreeCalypso > hg > freecalypso-sw
view target-utils/libcommon/osmodelay.S @ 476:536c53d3356c
gsm-fw/gpf/osl/contrib/os_tim_ir.c: version contributed by Das Signal
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Fri, 27 Jun 2014 03:57:09 +0000 |
parents | 07b686248ab7 |
children |
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/* * This assembly module provides a replica of OsmocomBB's bogo-millisecond * delay_ms() function. It is literally a copy of what OsmocomBB's delay_ms() * compiles to with their gcc version and their optimization settings, as seen * by doing arm-elf-objdump on their lib/delay.o. * * This hack is intended for those cases where we have to copy OsmocomBB's * black magic voodoo operations with no ability to understand what is actually * needed, such as SPCA552E initialization on the Pirelli DP-L10. */ .text .code 32 .globl osmo_delay_ms osmo_delay_ms: mov r3, #0 sub sp, sp, #4 str r3, [sp] ldr r3, =1300 mul r3, r0, r3 b 2f 1: ldr r2, [sp] ldr r2, [sp] add r2, r2, #1 str r2, [sp] 2: ldr r2, [sp] cmp r2, r3 bcc 1b add sp, sp, #4 bx lr