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| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
| commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
| tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/sparc/lib/GENpage.S | |
Initial import
Diffstat (limited to 'arch/sparc/lib/GENpage.S')
| -rw-r--r-- | arch/sparc/lib/GENpage.S | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/sparc/lib/GENpage.S b/arch/sparc/lib/GENpage.S new file mode 100644 index 000000000..2ef9d05f2 --- /dev/null +++ b/arch/sparc/lib/GENpage.S @@ -0,0 +1,77 @@ +/* GENpage.S: Generic clear and copy page. + * + * Copyright (C) 2007 (davem@davemloft.net) + */ +#include <asm/page.h> + + .text + .align 32 + +GENcopy_user_page: + set PAGE_SIZE, %g7 +1: ldx [%o1 + 0x00], %o2 + ldx [%o1 + 0x08], %o3 + ldx [%o1 + 0x10], %o4 + ldx [%o1 + 0x18], %o5 + stx %o2, [%o0 + 0x00] + stx %o3, [%o0 + 0x08] + stx %o4, [%o0 + 0x10] + stx %o5, [%o0 + 0x18] + ldx [%o1 + 0x20], %o2 + ldx [%o1 + 0x28], %o3 + ldx [%o1 + 0x30], %o4 + ldx [%o1 + 0x38], %o5 + stx %o2, [%o0 + 0x20] + stx %o3, [%o0 + 0x28] + stx %o4, [%o0 + 0x30] + stx %o5, [%o0 + 0x38] + subcc %g7, 64, %g7 + add %o1, 64, %o1 + bne,pt %xcc, 1b + add %o0, 64, %o0 + retl + nop + +GENclear_page: +GENclear_user_page: + set PAGE_SIZE, %g7 +1: stx %g0, [%o0 + 0x00] + stx %g0, [%o0 + 0x08] + stx %g0, [%o0 + 0x10] + stx %g0, [%o0 + 0x18] + stx %g0, [%o0 + 0x20] + stx %g0, [%o0 + 0x28] + stx %g0, [%o0 + 0x30] + stx %g0, [%o0 + 0x38] + subcc %g7, 64, %g7 + bne,pt %xcc, 1b + add %o0, 64, %o0 + +#define BRANCH_ALWAYS 0x10680000 +#define NOP 0x01000000 +#define GEN_DO_PATCH(OLD, NEW) \ + sethi %hi(NEW), %g1; \ + or %g1, %lo(NEW), %g1; \ + sethi %hi(OLD), %g2; \ + or %g2, %lo(OLD), %g2; \ + sub %g1, %g2, %g1; \ + sethi %hi(BRANCH_ALWAYS), %g3; \ + sll %g1, 11, %g1; \ + srl %g1, 11 + 2, %g1; \ + or %g3, %lo(BRANCH_ALWAYS), %g3; \ + or %g3, %g1, %g3; \ + stw %g3, [%g2]; \ + sethi %hi(NOP), %g3; \ + or %g3, %lo(NOP), %g3; \ + stw %g3, [%g2 + 0x4]; \ + flush %g2; + + .globl generic_patch_pageops + .type generic_patch_pageops,#function +generic_patch_pageops: + GEN_DO_PATCH(copy_user_page, GENcopy_user_page) + GEN_DO_PATCH(_clear_page, GENclear_page) + GEN_DO_PATCH(clear_user_page, GENclear_user_page) + retl + nop + .size generic_patch_pageops,.-generic_patch_pageops |