diff options
Diffstat (limited to 'arch/sparc/lib/NG4patch.S')
| -rw-r--r-- | arch/sparc/lib/NG4patch.S | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/sparc/lib/NG4patch.S b/arch/sparc/lib/NG4patch.S new file mode 100644 index 00000000000..c21c34c61dd --- /dev/null +++ b/arch/sparc/lib/NG4patch.S @@ -0,0 +1,43 @@ +/* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant. + * + * Copyright (C) 2012 David S. Miller <davem@davemloft.net> + */ + +#define BRANCH_ALWAYS 0x10680000 +#define NOP 0x01000000 +#define NG_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 niagara4_patch_copyops + .type niagara4_patch_copyops,#function +niagara4_patch_copyops: + NG_DO_PATCH(memcpy, NG4memcpy) + NG_DO_PATCH(___copy_from_user, NG4copy_from_user) + NG_DO_PATCH(___copy_to_user, NG4copy_to_user) + retl + nop + .size niagara4_patch_copyops,.-niagara4_patch_copyops + + .globl niagara4_patch_pageops + .type niagara4_patch_pageops,#function +niagara4_patch_pageops: + NG_DO_PATCH(copy_user_page, NG4copy_user_page) + NG_DO_PATCH(_clear_page, NGclear_page) + NG_DO_PATCH(clear_user_page, NGclear_user_page) + retl + nop + .size niagara4_patch_pageops,.-niagara4_patch_pageops |