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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/sparc/kernel/una_asm_32.S | |
| parent | Initial commit. (diff) | |
| download | linux-upstream/4.19.249.tar.xz linux-upstream/4.19.249.zip | |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sparc/kernel/una_asm_32.S')
| -rw-r--r-- | arch/sparc/kernel/una_asm_32.S | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/arch/sparc/kernel/una_asm_32.S b/arch/sparc/kernel/una_asm_32.S new file mode 100644 index 000000000..f8bf83928 --- /dev/null +++ b/arch/sparc/kernel/una_asm_32.S @@ -0,0 +1,154 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* una_asm.S: Kernel unaligned trap assembler helpers. + * + * Copyright (C) 1996,2005,2008 David S. Miller (davem@davemloft.net) + * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + */ + +#include <linux/errno.h> + + .text + +retl_efault: + retl + mov -EFAULT, %o0 + + /* int __do_int_store(unsigned long *dst_addr, int size, + * unsigned long *src_val) + * + * %o0 = dest_addr + * %o1 = size + * %o2 = src_val + * + * Return '0' on success, -EFAULT on failure. + */ + .globl __do_int_store +__do_int_store: + ld [%o2], %g1 + cmp %o1, 2 + be 2f + cmp %o1, 4 + be 1f + srl %g1, 24, %g2 + srl %g1, 16, %g7 +4: stb %g2, [%o0] + srl %g1, 8, %g2 +5: stb %g7, [%o0 + 1] + ld [%o2 + 4], %g7 +6: stb %g2, [%o0 + 2] + srl %g7, 24, %g2 +7: stb %g1, [%o0 + 3] + srl %g7, 16, %g1 +8: stb %g2, [%o0 + 4] + srl %g7, 8, %g2 +9: stb %g1, [%o0 + 5] +10: stb %g2, [%o0 + 6] + b 0f +11: stb %g7, [%o0 + 7] +1: srl %g1, 16, %g7 +12: stb %g2, [%o0] + srl %g1, 8, %g2 +13: stb %g7, [%o0 + 1] +14: stb %g2, [%o0 + 2] + b 0f +15: stb %g1, [%o0 + 3] +2: srl %g1, 8, %g2 +16: stb %g2, [%o0] +17: stb %g1, [%o0 + 1] +0: retl + mov 0, %o0 + + .section __ex_table,#alloc + .word 4b, retl_efault + .word 5b, retl_efault + .word 6b, retl_efault + .word 7b, retl_efault + .word 8b, retl_efault + .word 9b, retl_efault + .word 10b, retl_efault + .word 11b, retl_efault + .word 12b, retl_efault + .word 13b, retl_efault + .word 14b, retl_efault + .word 15b, retl_efault + .word 16b, retl_efault + .word 17b, retl_efault + .previous + + /* int do_int_load(unsigned long *dest_reg, int size, + * unsigned long *saddr, int is_signed) + * + * %o0 = dest_reg + * %o1 = size + * %o2 = saddr + * %o3 = is_signed + * + * Return '0' on success, -EFAULT on failure. + */ + .globl do_int_load +do_int_load: + cmp %o1, 8 + be 9f + cmp %o1, 4 + be 6f +4: ldub [%o2], %g1 +5: ldub [%o2 + 1], %g2 + sll %g1, 8, %g1 + tst %o3 + be 3f + or %g1, %g2, %g1 + sll %g1, 16, %g1 + sra %g1, 16, %g1 +3: b 0f + st %g1, [%o0] +6: ldub [%o2 + 1], %g2 + sll %g1, 24, %g1 +7: ldub [%o2 + 2], %g7 + sll %g2, 16, %g2 +8: ldub [%o2 + 3], %g3 + sll %g7, 8, %g7 + or %g3, %g2, %g3 + or %g7, %g3, %g7 + or %g1, %g7, %g1 + b 0f + st %g1, [%o0] +9: ldub [%o2], %g1 +10: ldub [%o2 + 1], %g2 + sll %g1, 24, %g1 +11: ldub [%o2 + 2], %g7 + sll %g2, 16, %g2 +12: ldub [%o2 + 3], %g3 + sll %g7, 8, %g7 + or %g1, %g2, %g1 + or %g7, %g3, %g7 + or %g1, %g7, %g7 +13: ldub [%o2 + 4], %g1 + st %g7, [%o0] +14: ldub [%o2 + 5], %g2 + sll %g1, 24, %g1 +15: ldub [%o2 + 6], %g7 + sll %g2, 16, %g2 +16: ldub [%o2 + 7], %g3 + sll %g7, 8, %g7 + or %g1, %g2, %g1 + or %g7, %g3, %g7 + or %g1, %g7, %g7 + st %g7, [%o0 + 4] +0: retl + mov 0, %o0 + + .section __ex_table,#alloc + .word 4b, retl_efault + .word 5b, retl_efault + .word 6b, retl_efault + .word 7b, retl_efault + .word 8b, retl_efault + .word 9b, retl_efault + .word 10b, retl_efault + .word 11b, retl_efault + .word 12b, retl_efault + .word 13b, retl_efault + .word 14b, retl_efault + .word 15b, retl_efault + .word 16b, retl_efault + .previous |