diff options
Diffstat (limited to 'arch/x86_64/lib/clear_page.S')
| -rw-r--r-- | arch/x86_64/lib/clear_page.S | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/arch/x86_64/lib/clear_page.S b/arch/x86_64/lib/clear_page.S deleted file mode 100644 index 30a9da458c1..00000000000 --- a/arch/x86_64/lib/clear_page.S +++ /dev/null @@ -1,50 +0,0 @@ -/* - * Zero a page. - * rdi page - */ - .globl clear_page - .p2align 4 -clear_page: - xorl %eax,%eax - movl $4096/64,%ecx - .p2align 4 -.Lloop: - decl %ecx -#define PUT(x) movq %rax,x*8(%rdi) - movq %rax,(%rdi) - PUT(1) - PUT(2) - PUT(3) - PUT(4) - PUT(5) - PUT(6) - PUT(7) - leaq 64(%rdi),%rdi - jnz .Lloop - nop - ret -clear_page_end: - - /* C stepping K8 run faster using the string instructions. - It is also a lot simpler. Use this when possible */ - -#include <asm/cpufeature.h> - - .section .altinstructions,"a" - .align 8 - .quad clear_page - .quad clear_page_c - .byte X86_FEATURE_K8_C - .byte clear_page_end-clear_page - .byte clear_page_c_end-clear_page_c - .previous - - .section .altinstr_replacement,"ax" -clear_page_c: - movl $4096/8,%ecx - xorl %eax,%eax - rep - stosq - ret -clear_page_c_end: - .previous |