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| /* 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
|
|
