diff options
Diffstat (limited to 'arch/x86_64/lib/clear_page_64.S')
| -rw-r--r-- | arch/x86_64/lib/clear_page_64.S | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/arch/x86_64/lib/clear_page_64.S b/arch/x86_64/lib/clear_page_64.S deleted file mode 100644 index 9a10a78bb4a..00000000000 --- a/arch/x86_64/lib/clear_page_64.S +++ /dev/null @@ -1,59 +0,0 @@ -#include <linux/linkage.h> -#include <asm/dwarf2.h> - -/* - * Zero a page. - * rdi page - */ - ALIGN -clear_page_c: - CFI_STARTPROC - movl $4096/8,%ecx - xorl %eax,%eax - rep stosq - ret - CFI_ENDPROC -ENDPROC(clear_page) - -ENTRY(clear_page) - CFI_STARTPROC - 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 - CFI_ENDPROC -.Lclear_page_end: -ENDPROC(clear_page) - - /* Some CPUs run faster using the string instructions. - It is also a lot simpler. Use this when possible */ - -#include <asm/cpufeature.h> - - .section .altinstr_replacement,"ax" -1: .byte 0xeb /* jmp <disp8> */ - .byte (clear_page_c - clear_page) - (2f - 1b) /* offset */ -2: - .previous - .section .altinstructions,"a" - .align 8 - .quad clear_page - .quad 1b - .byte X86_FEATURE_REP_GOOD - .byte .Lclear_page_end - clear_page - .byte 2b - 1b - .previous |