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author | Graeme Russ <graeme.russ@gmail.com> | 2011-12-27 22:46:41 +1100 |
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committer | Graeme Russ <graeme.russ@gmail.com> | 2012-01-04 21:05:00 +1100 |
commit | 1176a7067a89e68bbb1872b234f67bd2f4651051 (patch) | |
tree | f798c3dfbe3a56b95ebe03e8d8fdd1b807ea5ee8 | |
parent | b2c2a038426f651c574a97a02563f78c2dceaa89 (diff) | |
download | u-boot-1176a7067a89e68bbb1872b234f67bd2f4651051.tar.gz u-boot-1176a7067a89e68bbb1872b234f67bd2f4651051.tar.xz u-boot-1176a7067a89e68bbb1872b234f67bd2f4651051.zip |
x86: Speed up copy-to-RAM and clear BSS operations
The implementations of memcpy and memset are now the optimised versions
from glibc, so use them instead of simple copy loops
--
Changes for v2:
- Removed unneeded brackets
-rw-r--r-- | arch/x86/lib/board.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/x86/lib/board.c b/arch/x86/lib/board.c index d742fec928..f9eb15bed3 100644 --- a/arch/x86/lib/board.c +++ b/arch/x86/lib/board.c @@ -188,26 +188,19 @@ static int calculate_relocation_address(void) static int copy_uboot_to_ram(void) { - ulong *dst_addr = (ulong *)gd->relocaddr; - ulong *src_addr = (ulong *)&__text_start; - ulong *end_addr = (ulong *)&__data_end; + size_t len = (size_t)&__data_end - (size_t)&__text_start; - while (src_addr < end_addr) - *dst_addr++ = *src_addr++; + memcpy((void *)gd->relocaddr, (void *)&__text_start, len); return 0; } static int clear_bss(void) { - void *bss_start = &__bss_start; - void *bss_end = &__bss_end; + ulong dst_addr = (ulong)&__bss_start + gd->reloc_off; + size_t len = (size_t)&__bss_end - (size_t)&__bss_start; - ulong *dst_addr = (ulong *)(bss_start + gd->reloc_off); - ulong *end_addr = (ulong *)(bss_end + gd->reloc_off); - - while (dst_addr < end_addr) - *dst_addr++ = 0x00000000; + memset((void *)dst_addr, 0x00, len); return 0; } |