projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| f0e98c38 DM |
1 | /* una_asm.S: Kernel unaligned trap assembler helpers. |
| 2 | * | |
| 3 | * Copyright (C) 1996,2005,2008 David S. Miller (davem@davemloft.net) | |
| 4 | * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
| 5 | */ | |
| 6 | ||
| 7 | #include <linux/errno.h> | |
| 8 | ||
| 9 | .text | |
| 10 | ||
| 11 | retl_efault: | |
| 12 | retl | |
| 13 | mov -EFAULT, %o0 | |
| 14 | ||
| 15 | /* int __do_int_store(unsigned long *dst_addr, int size, | |
| 16 | * unsigned long *src_val) | |
| 17 | * | |
| 18 | * %o0 = dest_addr | |
| 19 | * %o1 = size | |
| 20 | * %o2 = src_val | |
| 21 | * | |
| 22 | * Return '0' on success, -EFAULT on failure. | |
| 23 | */ | |
| 24 | .globl __do_int_store | |
| 25 | __do_int_store: | |
| 26 | ld [%o2], %g1 | |
| 27 | cmp %1, 2 | |
| 28 | be 2f | |
| 29 | cmp %1, 4 | |
| 30 | be 1f | |
| 31 | srl %g1, 24, %g2 | |
| 32 | srl %g1, 16, %g7 | |
| 33 | 4: stb %g2, [%o0] | |
| 34 | srl %g1, 8, %g2 | |
| 35 | 5: stb %g7, [%o0 + 1] | |
| 36 | ld [%o2 + 4], %g7 | |
| 37 | 6: stb %g2, [%o0 + 2] | |
| 38 | srl %g7, 24, %g2 | |
| 39 | 7: stb %g1, [%o0 + 3] | |
| 40 | srl %g7, 16, %g1 | |
| 41 | 8: stb %g2, [%o0 + 4] | |
| 42 | srl %g7, 8, %g2 | |
| 43 | 9: stb %g1, [%o0 + 5] | |
| 44 | 10: stb %g2, [%o0 + 6] | |
| 45 | b 0f | |
| 46 | 11: stb %g7, [%o0 + 7] | |
| 47 | 1: srl %g1, 16, %g7 | |
| 48 | 12: stb %g2, [%o0] | |
| 49 | srl %g1, 8, %g2 | |
| 50 | 13: stb %g7, [%o0 + 1] | |
| 51 | 14: stb %g2, [%o0 + 2] | |
| 52 | b 0f | |
| 53 | 15: stb %g1, [%o0 + 3] | |
| 54 | 2: srl %g1, 8, %g2 | |
| 55 | 16: stb %g2, [%o0] | |
| 56 | 17: stb %g1, [%o0 + 1] | |
| 57 | 0: retl | |
| 58 | mov 0, %o0 | |
| 59 | ||
| 60 | .section __ex_table,#alloc | |
| 61 | .word 4b, retl_efault | |
| 62 | .word 5b, retl_efault | |
| 63 | .word 6b, retl_efault | |
| 64 | .word 7b, retl_efault | |
| 65 | .word 8b, retl_efault | |
| 66 | .word 9b, retl_efault | |
| 67 | .word 10b, retl_efault | |
| 68 | .word 11b, retl_efault | |
| 69 | .word 12b, retl_efault | |
| 70 | .word 13b, retl_efault | |
| 71 | .word 14b, retl_efault | |
| 72 | .word 15b, retl_efault | |
| 73 | .word 16b, retl_efault | |
| 74 | .word 17b, retl_efault | |
| 75 | .previous | |
| 76 | ||
| 77 | /* int do_int_load(unsigned long *dest_reg, int size, | |
| 78 | * unsigned long *saddr, int is_signed) | |
| 79 | * | |
| 80 | * %o0 = dest_reg | |
| 81 | * %o1 = size | |
| 82 | * %o2 = saddr | |
| 83 | * %o3 = is_signed | |
| 84 | * | |
| 85 | * Return '0' on success, -EFAULT on failure. | |
| 86 | */ | |
| 87 | .globl do_int_load | |
| 88 | do_int_load: | |
| 89 | cmp %o1, 8 | |
| 90 | be 9f | |
| 91 | cmp %o1, 4 | |
| 92 | be 6f | |
| 93 | 4: ldub [%o2], %g1 | |
| 94 | 5: ldub [%o2 + 1], %g2 | |
| 95 | sll %g1, 8, %g1 | |
| 96 | tst %o3 | |
| 97 | be 3f | |
| 98 | or %g1, %g2, %g1 | |
| 99 | sll %g1, 16, %g1 | |
| 100 | sra %g1, 16, %g1 | |
| 101 | 3: b 0f | |
| 102 | st %g1, [%o0] | |
| 103 | 6: ldub [%o2 + 1], %g2 | |
| 104 | sll %g1, 24, %g1 | |
| 105 | 7: ldub [%o2 + 2], %g7 | |
| 106 | sll %g2, 16, %g2 | |
| 107 | 8: ldub [%o2 + 3], %g3 | |
| 108 | sll %g7, 8, %g7 | |
| 109 | or %g3, %g2, %g3 | |
| 110 | or %g7, %g3, %g7 | |
| 111 | or %g1, %g7, %g1 | |
| 112 | b 0f | |
| 113 | st %g1, [%o0] | |
| 114 | 9: ldub [%o2], %g1 | |
| 115 | 10: ldub [%o2 + 1], %g2 | |
| 116 | sll %g1, 24, %g1 | |
| 117 | 11: ldub [%o2 + 2], %g7 | |
| 118 | sll %g2, 16, %g2 | |
| 119 | 12: ldub [%o2 + 3], %g3 | |
| 120 | sll %g7, 8, %g7 | |
| 121 | or %g1, %g2, %g1 | |
| 122 | or %g7, %g3, %g7 | |
| 123 | or %g1, %g7, %g7 | |
| 124 | 13: ldub [%o2 + 4], %g1 | |
| 125 | st %g7, [%o0] | |
| 126 | 14: ldub [%o2 + 5], %g2 | |
| 127 | sll %g1, 24, %g1 | |
| 128 | 15: ldub [%o2 + 6], %g7 | |
| 129 | sll %g2, 16, %g2 | |
| 130 | 16: ldub [%o2 + 7], %g3 | |
| 131 | sll %g7, 8, %g7 | |
| 132 | or %g1, %g2, %g1 | |
| 133 | or %g7, %g3, %g7 | |
| 134 | or %g1, %g7, %g7 | |
| 135 | st %g7, [%o0 + 4] | |
| 136 | 0: retl | |
| 137 | mov 0, %o0 | |
| 138 | ||
| 139 | .section __ex_table,#alloc | |
| 140 | .word 4b, retl_efault | |
| 141 | .word 5b, retl_efault | |
| 142 | .word 6b, retl_efault | |
| 143 | .word 7b, retl_efault | |
| 144 | .word 8b, retl_efault | |
| 145 | .word 9b, retl_efault | |
| 146 | .word 10b, retl_efault | |
| 147 | .word 11b, retl_efault | |
| 148 | .word 12b, retl_efault | |
| 149 | .word 13b, retl_efault | |
| 150 | .word 14b, retl_efault | |
| 151 | .word 15b, retl_efault | |
| 152 | .word 16b, retl_efault | |
| 153 | .previous |