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Diffstat (limited to '')
| -rw-r--r-- | arch/sparc/lib/NG2patch.S | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/sparc/lib/NG2patch.S b/arch/sparc/lib/NG2patch.S new file mode 100644 index 000000000..72431b244 --- /dev/null +++ b/arch/sparc/lib/NG2patch.S @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* NG2patch.S: Patch Ultra-I routines with Niagara-2 variant. + * + * Copyright (C) 2007 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 niagara2_patch_copyops + .type niagara2_patch_copyops,#function +niagara2_patch_copyops: + NG_DO_PATCH(memcpy, NG2memcpy) + NG_DO_PATCH(raw_copy_from_user, NG2copy_from_user) + NG_DO_PATCH(raw_copy_to_user, NG2copy_to_user) + retl + nop + .size niagara2_patch_copyops,.-niagara2_patch_copyops |