| /* 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 |