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- /* 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
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