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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2010-12-29 10:52:03 +0000 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2010-12-29 10:52:03 +0000 |
| commit | 47b0230107675dbed34aefb34b0a0edc85c0ca93 (patch) | |
| tree | 1d2597d1748e196577ee5c2e99c06781cb7da984 /c/src/lib/libbsp/powerpc/shared/src | |
| parent | 2010-12-29 Sebastian Huber <sebastian.huber@embedded-brains.de> (diff) | |
| download | rtems-47b0230107675dbed34aefb34b0a0edc85c0ca93.tar.bz2 | |
2010-12-29 Sebastian Huber <sebastian.huber@embedded-brains.de>
* shared/include/start.h, shared/src/bsp-start-zero.S: New files.
Diffstat (limited to 'c/src/lib/libbsp/powerpc/shared/src')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/shared/src/bsp-start-zero.S | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/shared/src/bsp-start-zero.S b/c/src/lib/libbsp/powerpc/shared/src/bsp-start-zero.S new file mode 100644 index 0000000000..cc05608452 --- /dev/null +++ b/c/src/lib/libbsp/powerpc/shared/src/bsp-start-zero.S @@ -0,0 +1,102 @@ +/** + * @file + * + * @ingroup bsp_start + * + * @brief bsp_start_zero() implementation. + */ + +/* + * Copyright (c) 2010 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Obere Lagerstr. 30 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#include <rtems/asm.h> +#include <bspopts.h> + + .globl bsp_start_zero + .globl bsp_start_zero_begin + .globl bsp_start_zero_end + .globl bsp_start_zero_size + + .section ".bsp_start_text", "ax" + .type bsp_start_zero, @function +bsp_start_zero: +bsp_start_zero_begin: + li r0, 0 + subi r11, r3, 1 + clrrwi r11, r11, 5 + addi r10, r11, 32 + subf r11, r3, r10 + cmplw cr7, r11, r4 + add r9, r3, r4 + ble- cr7, head_end_done + mr r10, r9 +head_end_done: + subf r11, r3, r10 + addi r11, r11, 1 + mtctr r11 + + /* Head loop */ + b head_loop_update +head_loop_begin: + stb r0, 0(r3) + addi r3, r3, 1 +head_loop_update: + bdnz+ head_loop_begin + + subf r11, r3, r9 + srwi r11, r11, 5 + addi r11, r11, 1 + mtctr r11 + + /* Main loop */ + b main_loop_update +main_loop_begin: +#ifdef DATA_CACHE_ENABLE + dcbz r0, r3 + dcbf r0, r3 +#else + stw r0, 0(r3) + stw r0, 4(r3) + stw r0, 8(r3) + stw r0, 12(r3) + stw r0, 16(r3) + stw r0, 20(r3) + stw r0, 24(r3) + stw r0, 28(r3) +#endif + addi r3, r3, 32 +main_loop_update: + bdnz+ main_loop_begin + + subf r9, r3, r9 + addi r9, r9, 1 + mtctr r9 + + /* Tail loop */ + b tail_loop_update +tail_loop_begin: + stb r0, 0(r3) + addi r3, r3, 1 +tail_loop_update: + bdnz+ tail_loop_begin + + /* Return */ + sync + isync + blr + +bsp_start_zero_end: + .set bsp_start_zero_size, bsp_start_zero_end - bsp_start_zero_begin |