| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* cif.S: PROM entry/exit assembler trampolines. |
| 2 | * |
| 3 | * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
| 4 | * Copyright (C) 2005 David S. Miller <davem@davemloft.net> |
| 5 | */ |
| 6 | |
| 7 | #include <asm/pstate.h> |
| 8 | |
| 9 | .text |
| 10 | .globl prom_cif_interface |
| 11 | prom_cif_interface: |
| 12 | sethi %hi(p1275buf), %o0 |
| 13 | or %o0, %lo(p1275buf), %o0 |
| 14 | ldx [%o0 + 0x010], %o1 ! prom_cif_stack |
| 15 | save %o1, -0x190, %sp |
| 16 | ldx [%i0 + 0x008], %l2 ! prom_cif_handler |
| 17 | rdpr %pstate, %l4 |
| 18 | wrpr %g0, 0x15, %pstate ! save alternate globals |
| 19 | stx %g1, [%sp + 2047 + 0x0b0] |
| 20 | stx %g2, [%sp + 2047 + 0x0b8] |
| 21 | stx %g3, [%sp + 2047 + 0x0c0] |
| 22 | stx %g4, [%sp + 2047 + 0x0c8] |
| 23 | stx %g5, [%sp + 2047 + 0x0d0] |
| 24 | stx %g6, [%sp + 2047 + 0x0d8] |
| 25 | stx %g7, [%sp + 2047 + 0x0e0] |
| 26 | wrpr %g0, 0x814, %pstate ! save interrupt globals |
| 27 | stx %g1, [%sp + 2047 + 0x0e8] |
| 28 | stx %g2, [%sp + 2047 + 0x0f0] |
| 29 | stx %g3, [%sp + 2047 + 0x0f8] |
| 30 | stx %g4, [%sp + 2047 + 0x100] |
| 31 | stx %g5, [%sp + 2047 + 0x108] |
| 32 | stx %g6, [%sp + 2047 + 0x110] |
| 33 | stx %g7, [%sp + 2047 + 0x118] |
| 34 | wrpr %g0, 0x14, %pstate ! save normal globals |
| 35 | stx %g1, [%sp + 2047 + 0x120] |
| 36 | stx %g2, [%sp + 2047 + 0x128] |
| 37 | stx %g3, [%sp + 2047 + 0x130] |
| 38 | stx %g4, [%sp + 2047 + 0x138] |
| 39 | stx %g5, [%sp + 2047 + 0x140] |
| 40 | stx %g6, [%sp + 2047 + 0x148] |
| 41 | stx %g7, [%sp + 2047 + 0x150] |
| 42 | wrpr %g0, 0x414, %pstate ! save mmu globals |
| 43 | stx %g1, [%sp + 2047 + 0x158] |
| 44 | stx %g2, [%sp + 2047 + 0x160] |
| 45 | stx %g3, [%sp + 2047 + 0x168] |
| 46 | stx %g4, [%sp + 2047 + 0x170] |
| 47 | stx %g5, [%sp + 2047 + 0x178] |
| 48 | stx %g6, [%sp + 2047 + 0x180] |
| 49 | stx %g7, [%sp + 2047 + 0x188] |
| 50 | mov %g1, %l0 ! also save to locals, so we can handle |
| 51 | mov %g2, %l1 ! tlb faults later on, when accessing |
| 52 | mov %g3, %l3 ! the stack. |
| 53 | mov %g7, %l5 |
| 54 | wrpr %l4, PSTATE_IE, %pstate ! turn off interrupts |
| 55 | call %l2 |
| 56 | add %i0, 0x018, %o0 ! prom_args |
| 57 | wrpr %g0, 0x414, %pstate ! restore mmu globals |
| 58 | mov %l0, %g1 |
| 59 | mov %l1, %g2 |
| 60 | mov %l3, %g3 |
| 61 | mov %l5, %g7 |
| 62 | wrpr %g0, 0x14, %pstate ! restore normal globals |
| 63 | ldx [%sp + 2047 + 0x120], %g1 |
| 64 | ldx [%sp + 2047 + 0x128], %g2 |
| 65 | ldx [%sp + 2047 + 0x130], %g3 |
| 66 | ldx [%sp + 2047 + 0x138], %g4 |
| 67 | ldx [%sp + 2047 + 0x140], %g5 |
| 68 | ldx [%sp + 2047 + 0x148], %g6 |
| 69 | ldx [%sp + 2047 + 0x150], %g7 |
| 70 | wrpr %g0, 0x814, %pstate ! restore interrupt globals |
| 71 | ldx [%sp + 2047 + 0x0e8], %g1 |
| 72 | ldx [%sp + 2047 + 0x0f0], %g2 |
| 73 | ldx [%sp + 2047 + 0x0f8], %g3 |
| 74 | ldx [%sp + 2047 + 0x100], %g4 |
| 75 | ldx [%sp + 2047 + 0x108], %g5 |
| 76 | ldx [%sp + 2047 + 0x110], %g6 |
| 77 | ldx [%sp + 2047 + 0x118], %g7 |
| 78 | wrpr %g0, 0x15, %pstate ! restore alternate globals |
| 79 | ldx [%sp + 2047 + 0x0b0], %g1 |
| 80 | ldx [%sp + 2047 + 0x0b8], %g2 |
| 81 | ldx [%sp + 2047 + 0x0c0], %g3 |
| 82 | ldx [%sp + 2047 + 0x0c8], %g4 |
| 83 | ldx [%sp + 2047 + 0x0d0], %g5 |
| 84 | ldx [%sp + 2047 + 0x0d8], %g6 |
| 85 | ldx [%sp + 2047 + 0x0e0], %g7 |
| 86 | wrpr %l4, 0, %pstate ! restore original pstate |
| 87 | ret |
| 88 | restore |
| 89 | |
| 90 | .globl prom_cif_callback |
| 91 | prom_cif_callback: |
| 92 | sethi %hi(p1275buf), %o1 |
| 93 | or %o1, %lo(p1275buf), %o1 |
| 94 | save %sp, -0x270, %sp |
| 95 | rdpr %pstate, %l4 |
| 96 | wrpr %g0, 0x15, %pstate ! save PROM alternate globals |
| 97 | stx %g1, [%sp + 2047 + 0x0b0] |
| 98 | stx %g2, [%sp + 2047 + 0x0b8] |
| 99 | stx %g3, [%sp + 2047 + 0x0c0] |
| 100 | stx %g4, [%sp + 2047 + 0x0c8] |
| 101 | stx %g5, [%sp + 2047 + 0x0d0] |
| 102 | stx %g6, [%sp + 2047 + 0x0d8] |
| 103 | stx %g7, [%sp + 2047 + 0x0e0] |
| 104 | ! restore Linux alternate globals |
| 105 | ldx [%sp + 2047 + 0x190], %g1 |
| 106 | ldx [%sp + 2047 + 0x198], %g2 |
| 107 | ldx [%sp + 2047 + 0x1a0], %g3 |
| 108 | ldx [%sp + 2047 + 0x1a8], %g4 |
| 109 | ldx [%sp + 2047 + 0x1b0], %g5 |
| 110 | ldx [%sp + 2047 + 0x1b8], %g6 |
| 111 | ldx [%sp + 2047 + 0x1c0], %g7 |
| 112 | wrpr %g0, 0x814, %pstate ! save PROM interrupt globals |
| 113 | stx %g1, [%sp + 2047 + 0x0e8] |
| 114 | stx %g2, [%sp + 2047 + 0x0f0] |
| 115 | stx %g3, [%sp + 2047 + 0x0f8] |
| 116 | stx %g4, [%sp + 2047 + 0x100] |
| 117 | stx %g5, [%sp + 2047 + 0x108] |
| 118 | stx %g6, [%sp + 2047 + 0x110] |
| 119 | stx %g7, [%sp + 2047 + 0x118] |
| 120 | ! restore Linux interrupt globals |
| 121 | ldx [%sp + 2047 + 0x1c8], %g1 |
| 122 | ldx [%sp + 2047 + 0x1d0], %g2 |
| 123 | ldx [%sp + 2047 + 0x1d8], %g3 |
| 124 | ldx [%sp + 2047 + 0x1e0], %g4 |
| 125 | ldx [%sp + 2047 + 0x1e8], %g5 |
| 126 | ldx [%sp + 2047 + 0x1f0], %g6 |
| 127 | ldx [%sp + 2047 + 0x1f8], %g7 |
| 128 | wrpr %g0, 0x14, %pstate ! save PROM normal globals |
| 129 | stx %g1, [%sp + 2047 + 0x120] |
| 130 | stx %g2, [%sp + 2047 + 0x128] |
| 131 | stx %g3, [%sp + 2047 + 0x130] |
| 132 | stx %g4, [%sp + 2047 + 0x138] |
| 133 | stx %g5, [%sp + 2047 + 0x140] |
| 134 | stx %g6, [%sp + 2047 + 0x148] |
| 135 | stx %g7, [%sp + 2047 + 0x150] |
| 136 | ! restore Linux normal globals |
| 137 | ldx [%sp + 2047 + 0x200], %g1 |
| 138 | ldx [%sp + 2047 + 0x208], %g2 |
| 139 | ldx [%sp + 2047 + 0x210], %g3 |
| 140 | ldx [%sp + 2047 + 0x218], %g4 |
| 141 | ldx [%sp + 2047 + 0x220], %g5 |
| 142 | ldx [%sp + 2047 + 0x228], %g6 |
| 143 | ldx [%sp + 2047 + 0x230], %g7 |
| 144 | wrpr %g0, 0x414, %pstate ! save PROM mmu globals |
| 145 | stx %g1, [%sp + 2047 + 0x158] |
| 146 | stx %g2, [%sp + 2047 + 0x160] |
| 147 | stx %g3, [%sp + 2047 + 0x168] |
| 148 | stx %g4, [%sp + 2047 + 0x170] |
| 149 | stx %g5, [%sp + 2047 + 0x178] |
| 150 | stx %g6, [%sp + 2047 + 0x180] |
| 151 | stx %g7, [%sp + 2047 + 0x188] |
| 152 | ! restore Linux mmu globals |
| 153 | ldx [%sp + 2047 + 0x238], %o0 |
| 154 | ldx [%sp + 2047 + 0x240], %o1 |
| 155 | ldx [%sp + 2047 + 0x248], %l2 |
| 156 | ldx [%sp + 2047 + 0x250], %l3 |
| 157 | ldx [%sp + 2047 + 0x258], %l5 |
| 158 | ldx [%sp + 2047 + 0x260], %l6 |
| 159 | ldx [%sp + 2047 + 0x268], %l7 |
| 160 | ! switch to Linux tba |
| 161 | sethi %hi(sparc64_ttable_tl0), %l1 |
| 162 | rdpr %tba, %l0 ! save PROM tba |
| 163 | mov %o0, %g1 |
| 164 | mov %o1, %g2 |
| 165 | mov %l2, %g3 |
| 166 | mov %l3, %g4 |
| 167 | mov %l5, %g5 |
| 168 | mov %l6, %g6 |
| 169 | mov %l7, %g7 |
| 170 | wrpr %l1, %tba ! install Linux tba |
| 171 | wrpr %l4, 0, %pstate ! restore PSTATE |
| 172 | call prom_world |
| 173 | mov %g0, %o0 |
| 174 | ldx [%i1 + 0x000], %l2 |
| 175 | call %l2 |
| 176 | mov %i0, %o0 |
| 177 | mov %o0, %l1 |
| 178 | call prom_world |
| 179 | or %g0, 1, %o0 |
| 180 | wrpr %g0, 0x14, %pstate ! interrupts off |
| 181 | ! restore PROM mmu globals |
| 182 | ldx [%sp + 2047 + 0x158], %o0 |
| 183 | ldx [%sp + 2047 + 0x160], %o1 |
| 184 | ldx [%sp + 2047 + 0x168], %l2 |
| 185 | ldx [%sp + 2047 + 0x170], %l3 |
| 186 | ldx [%sp + 2047 + 0x178], %l5 |
| 187 | ldx [%sp + 2047 + 0x180], %l6 |
| 188 | ldx [%sp + 2047 + 0x188], %l7 |
| 189 | wrpr %g0, 0x414, %pstate ! restore PROM mmu globals |
| 190 | mov %o0, %g1 |
| 191 | mov %o1, %g2 |
| 192 | mov %l2, %g3 |
| 193 | mov %l3, %g4 |
| 194 | mov %l5, %g5 |
| 195 | mov %l6, %g6 |
| 196 | mov %l7, %g7 |
| 197 | wrpr %l0, %tba ! restore PROM tba |
| 198 | wrpr %g0, 0x14, %pstate ! restore PROM normal globals |
| 199 | ldx [%sp + 2047 + 0x120], %g1 |
| 200 | ldx [%sp + 2047 + 0x128], %g2 |
| 201 | ldx [%sp + 2047 + 0x130], %g3 |
| 202 | ldx [%sp + 2047 + 0x138], %g4 |
| 203 | ldx [%sp + 2047 + 0x140], %g5 |
| 204 | ldx [%sp + 2047 + 0x148], %g6 |
| 205 | ldx [%sp + 2047 + 0x150], %g7 |
| 206 | wrpr %g0, 0x814, %pstate ! restore PROM interrupt globals |
| 207 | ldx [%sp + 2047 + 0x0e8], %g1 |
| 208 | ldx [%sp + 2047 + 0x0f0], %g2 |
| 209 | ldx [%sp + 2047 + 0x0f8], %g3 |
| 210 | ldx [%sp + 2047 + 0x100], %g4 |
| 211 | ldx [%sp + 2047 + 0x108], %g5 |
| 212 | ldx [%sp + 2047 + 0x110], %g6 |
| 213 | ldx [%sp + 2047 + 0x118], %g7 |
| 214 | wrpr %g0, 0x15, %pstate ! restore PROM alternate globals |
| 215 | ldx [%sp + 2047 + 0x0b0], %g1 |
| 216 | ldx [%sp + 2047 + 0x0b8], %g2 |
| 217 | ldx [%sp + 2047 + 0x0c0], %g3 |
| 218 | ldx [%sp + 2047 + 0x0c8], %g4 |
| 219 | ldx [%sp + 2047 + 0x0d0], %g5 |
| 220 | ldx [%sp + 2047 + 0x0d8], %g6 |
| 221 | ldx [%sp + 2047 + 0x0e0], %g7 |
| 222 | wrpr %l4, 0, %pstate |
| 223 | ret |
| 224 | restore %l1, 0, %o0 |
| 225 | |