Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 | /* $Id: p1275.c,v 1.22 2001/10/18 09:40:00 davem Exp $ * p1275.c: Sun IEEE 1275 PROM low level interface routines * * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/sched.h> #include <linux/smp.h> #include <linux/string.h> #include <linux/spinlock.h> #include <asm/openprom.h> #include <asm/oplib.h> #include <asm/system.h> #include <asm/spitfire.h> #include <asm/pstate.h> struct { long prom_callback; /* 0x00 */ void (*prom_cif_handler)(long *); /* 0x08 */ unsigned long prom_cif_stack; /* 0x10 */ unsigned long prom_args [23]; /* 0x18 */ char prom_buffer [3000]; } p1275buf; extern void prom_world(int); void prom_cif_interface (void) { __asm__ __volatile__ ( " mov %0, %%o0\n" " ldx [%%o0 + 0x010], %%o1 ! prom_cif_stack\n" " save %%o1, -0x190, %%sp\n" " ldx [%%i0 + 0x008], %%l2 ! prom_cif_handler\n" " rdpr %%pstate, %%l4\n" " wrpr %%g0, 0x15, %%pstate ! save alternate globals\n" " stx %%g1, [%%sp + 2047 + 0x0b0]\n" " stx %%g2, [%%sp + 2047 + 0x0b8]\n" " stx %%g3, [%%sp + 2047 + 0x0c0]\n" " stx %%g4, [%%sp + 2047 + 0x0c8]\n" " stx %%g5, [%%sp + 2047 + 0x0d0]\n" " stx %%g6, [%%sp + 2047 + 0x0d8]\n" " stx %%g7, [%%sp + 2047 + 0x0e0]\n" " wrpr %%g0, 0x814, %%pstate ! save interrupt globals\n" " stx %%g1, [%%sp + 2047 + 0x0e8]\n" " stx %%g2, [%%sp + 2047 + 0x0f0]\n" " stx %%g3, [%%sp + 2047 + 0x0f8]\n" " stx %%g4, [%%sp + 2047 + 0x100]\n" " stx %%g5, [%%sp + 2047 + 0x108]\n" " stx %%g6, [%%sp + 2047 + 0x110]\n" " stx %%g7, [%%sp + 2047 + 0x118]\n" " wrpr %%g0, 0x14, %%pstate ! save normal globals\n" " stx %%g1, [%%sp + 2047 + 0x120]\n" " stx %%g2, [%%sp + 2047 + 0x128]\n" " stx %%g3, [%%sp + 2047 + 0x130]\n" " stx %%g4, [%%sp + 2047 + 0x138]\n" " stx %%g5, [%%sp + 2047 + 0x140]\n" " stx %%g6, [%%sp + 2047 + 0x148]\n" " stx %%g7, [%%sp + 2047 + 0x150]\n" " wrpr %%g0, 0x414, %%pstate ! save mmu globals\n" " stx %%g1, [%%sp + 2047 + 0x158]\n" " stx %%g2, [%%sp + 2047 + 0x160]\n" " stx %%g3, [%%sp + 2047 + 0x168]\n" " stx %%g4, [%%sp + 2047 + 0x170]\n" " stx %%g5, [%%sp + 2047 + 0x178]\n" " stx %%g6, [%%sp + 2047 + 0x180]\n" " stx %%g7, [%%sp + 2047 + 0x188]\n" " mov %%g1, %%l0 ! also save to locals, so we can handle\n" " mov %%g2, %%l1 ! tlb faults later on, when accessing\n" " mov %%g3, %%l3 ! the stack.\n" " mov %%g7, %%l5\n" " wrpr %%l4, %1, %%pstate ! turn off interrupts\n" " call %%l2\n" " add %%i0, 0x018, %%o0 ! prom_args\n" " wrpr %%g0, 0x414, %%pstate ! restore mmu globals\n" " mov %%l0, %%g1\n" " mov %%l1, %%g2\n" " mov %%l3, %%g3\n" " mov %%l5, %%g7\n" " wrpr %%g0, 0x14, %%pstate ! restore normal globals\n" " ldx [%%sp + 2047 + 0x120], %%g1\n" " ldx [%%sp + 2047 + 0x128], %%g2\n" " ldx [%%sp + 2047 + 0x130], %%g3\n" " ldx [%%sp + 2047 + 0x138], %%g4\n" " ldx [%%sp + 2047 + 0x140], %%g5\n" " ldx [%%sp + 2047 + 0x148], %%g6\n" " ldx [%%sp + 2047 + 0x150], %%g7\n" " wrpr %%g0, 0x814, %%pstate ! restore interrupt globals\n" " ldx [%%sp + 2047 + 0x0e8], %%g1\n" " ldx [%%sp + 2047 + 0x0f0], %%g2\n" " ldx [%%sp + 2047 + 0x0f8], %%g3\n" " ldx [%%sp + 2047 + 0x100], %%g4\n" " ldx [%%sp + 2047 + 0x108], %%g5\n" " ldx [%%sp + 2047 + 0x110], %%g6\n" " ldx [%%sp + 2047 + 0x118], %%g7\n" " wrpr %%g0, 0x15, %%pstate ! restore alternate globals\n" " ldx [%%sp + 2047 + 0x0b0], %%g1\n" " ldx [%%sp + 2047 + 0x0b8], %%g2\n" " ldx [%%sp + 2047 + 0x0c0], %%g3\n" " ldx [%%sp + 2047 + 0x0c8], %%g4\n" " ldx [%%sp + 2047 + 0x0d0], %%g5\n" " ldx [%%sp + 2047 + 0x0d8], %%g6\n" " ldx [%%sp + 2047 + 0x0e0], %%g7\n" " wrpr %%l4, 0, %%pstate ! restore original pstate\n" " ret\n" " restore\n" " " : : "r" (&p1275buf), "i" (PSTATE_IE)); } void prom_cif_callback(void) { __asm__ __volatile__ ( " mov %0, %%o1\n" " save %%sp, -0x270, %%sp\n" " rdpr %%pstate, %%l4\n" " wrpr %%g0, 0x15, %%pstate ! save PROM alternate globals\n" " stx %%g1, [%%sp + 2047 + 0x0b0]\n" " stx %%g2, [%%sp + 2047 + 0x0b8]\n" " stx %%g3, [%%sp + 2047 + 0x0c0]\n" " stx %%g4, [%%sp + 2047 + 0x0c8]\n" " stx %%g5, [%%sp + 2047 + 0x0d0]\n" " stx %%g6, [%%sp + 2047 + 0x0d8]\n" " stx %%g7, [%%sp + 2047 + 0x0e0]\n" " ! restore Linux alternate globals\n" " ldx [%%sp + 2047 + 0x190], %%g1\n" " ldx [%%sp + 2047 + 0x198], %%g2\n" " ldx [%%sp + 2047 + 0x1a0], %%g3\n" " ldx [%%sp + 2047 + 0x1a8], %%g4\n" " ldx [%%sp + 2047 + 0x1b0], %%g5\n" " ldx [%%sp + 2047 + 0x1b8], %%g6\n" " ldx [%%sp + 2047 + 0x1c0], %%g7\n" " wrpr %%g0, 0x814, %%pstate ! save PROM interrupt globals\n" " stx %%g1, [%%sp + 2047 + 0x0e8]\n" " stx %%g2, [%%sp + 2047 + 0x0f0]\n" " stx %%g3, [%%sp + 2047 + 0x0f8]\n" " stx %%g4, [%%sp + 2047 + 0x100]\n" " stx %%g5, [%%sp + 2047 + 0x108]\n" " stx %%g6, [%%sp + 2047 + 0x110]\n" " stx %%g7, [%%sp + 2047 + 0x118]\n" " ! restore Linux interrupt globals\n" " ldx [%%sp + 2047 + 0x1c8], %%g1\n" " ldx [%%sp + 2047 + 0x1d0], %%g2\n" " ldx [%%sp + 2047 + 0x1d8], %%g3\n" " ldx [%%sp + 2047 + 0x1e0], %%g4\n" " ldx [%%sp + 2047 + 0x1e8], %%g5\n" " ldx [%%sp + 2047 + 0x1f0], %%g6\n" " ldx [%%sp + 2047 + 0x1f8], %%g7\n" " wrpr %%g0, 0x14, %%pstate ! save PROM normal globals\n" " stx %%g1, [%%sp + 2047 + 0x120]\n" " stx %%g2, [%%sp + 2047 + 0x128]\n" " stx %%g3, [%%sp + 2047 + 0x130]\n" " stx %%g4, [%%sp + 2047 + 0x138]\n" " stx %%g5, [%%sp + 2047 + 0x140]\n" " stx %%g6, [%%sp + 2047 + 0x148]\n" " stx %%g7, [%%sp + 2047 + 0x150]\n" " ! restore Linux normal globals\n" " ldx [%%sp + 2047 + 0x200], %%g1\n" " ldx [%%sp + 2047 + 0x208], %%g2\n" " ldx [%%sp + 2047 + 0x210], %%g3\n" " ldx [%%sp + 2047 + 0x218], %%g4\n" " ldx [%%sp + 2047 + 0x220], %%g5\n" " ldx [%%sp + 2047 + 0x228], %%g6\n" " ldx [%%sp + 2047 + 0x230], %%g7\n" " wrpr %%g0, 0x414, %%pstate ! save PROM mmu globals\n" " stx %%g1, [%%sp + 2047 + 0x158]\n" " stx %%g2, [%%sp + 2047 + 0x160]\n" " stx %%g3, [%%sp + 2047 + 0x168]\n" " stx %%g4, [%%sp + 2047 + 0x170]\n" " stx %%g5, [%%sp + 2047 + 0x178]\n" " stx %%g6, [%%sp + 2047 + 0x180]\n" " stx %%g7, [%%sp + 2047 + 0x188]\n" " ! restore Linux mmu globals\n" " ldx [%%sp + 2047 + 0x238], %%o0\n" " ldx [%%sp + 2047 + 0x240], %%o1\n" " ldx [%%sp + 2047 + 0x248], %%l2\n" " ldx [%%sp + 2047 + 0x250], %%l3\n" " ldx [%%sp + 2047 + 0x258], %%l5\n" " ldx [%%sp + 2047 + 0x260], %%l6\n" " ldx [%%sp + 2047 + 0x268], %%l7\n" " ! switch to Linux tba\n" " sethi %%hi(sparc64_ttable_tl0), %%l1\n" " rdpr %%tba, %%l0 ! save PROM tba\n" " mov %%o0, %%g1\n" " mov %%o1, %%g2\n" " mov %%l2, %%g3\n" " mov %%l3, %%g4\n" " mov %%l5, %%g5\n" " mov %%l6, %%g6\n" " mov %%l7, %%g7\n" " wrpr %%l1, %%tba ! install Linux tba\n" " wrpr %%l4, 0, %%pstate ! restore PSTATE\n" " call prom_world\n" " mov %%g0, %%o0\n" " ldx [%%i1 + 0x000], %%l2\n" " call %%l2\n" " mov %%i0, %%o0\n" " mov %%o0, %%l1\n" " call prom_world\n" " or %%g0, 1, %%o0\n" " wrpr %%g0, 0x14, %%pstate ! interrupts off\n" " ! restore PROM mmu globals\n" " ldx [%%sp + 2047 + 0x158], %%o0\n" " ldx [%%sp + 2047 + 0x160], %%o1\n" " ldx [%%sp + 2047 + 0x168], %%l2\n" " ldx [%%sp + 2047 + 0x170], %%l3\n" " ldx [%%sp + 2047 + 0x178], %%l5\n" " ldx [%%sp + 2047 + 0x180], %%l6\n" " ldx [%%sp + 2047 + 0x188], %%l7\n" " wrpr %%g0, 0x414, %%pstate ! restore PROM mmu globals\n" " mov %%o0, %%g1\n" " mov %%o1, %%g2\n" " mov %%l2, %%g3\n" " mov %%l3, %%g4\n" " mov %%l5, %%g5\n" " mov %%l6, %%g6\n" " mov %%l7, %%g7\n" " wrpr %%l0, %%tba ! restore PROM tba\n" " wrpr %%g0, 0x14, %%pstate ! restore PROM normal globals\n" " ldx [%%sp + 2047 + 0x120], %%g1\n" " ldx [%%sp + 2047 + 0x128], %%g2\n" " ldx [%%sp + 2047 + 0x130], %%g3\n" " ldx [%%sp + 2047 + 0x138], %%g4\n" " ldx [%%sp + 2047 + 0x140], %%g5\n" " ldx [%%sp + 2047 + 0x148], %%g6\n" " ldx [%%sp + 2047 + 0x150], %%g7\n" " wrpr %%g0, 0x814, %%pstate ! restore PROM interrupt globals\n" " ldx [%%sp + 2047 + 0x0e8], %%g1\n" " ldx [%%sp + 2047 + 0x0f0], %%g2\n" " ldx [%%sp + 2047 + 0x0f8], %%g3\n" " ldx [%%sp + 2047 + 0x100], %%g4\n" " ldx [%%sp + 2047 + 0x108], %%g5\n" " ldx [%%sp + 2047 + 0x110], %%g6\n" " ldx [%%sp + 2047 + 0x118], %%g7\n" " wrpr %%g0, 0x15, %%pstate ! restore PROM alternate globals\n" " ldx [%%sp + 2047 + 0x0b0], %%g1\n" " ldx [%%sp + 2047 + 0x0b8], %%g2\n" " ldx [%%sp + 2047 + 0x0c0], %%g3\n" " ldx [%%sp + 2047 + 0x0c8], %%g4\n" " ldx [%%sp + 2047 + 0x0d0], %%g5\n" " ldx [%%sp + 2047 + 0x0d8], %%g6\n" " ldx [%%sp + 2047 + 0x0e0], %%g7\n" " wrpr %%l4, 0, %%pstate\n" " ret\n" " restore %%l1, 0, %%o0\n" " " : : "r" (&p1275buf), "i" (PSTATE_PRIV)); } /* * This provides SMP safety on the p1275buf. prom_callback() drops this lock * to allow recursuve acquisition. */ spinlock_t prom_entry_lock = SPIN_LOCK_UNLOCKED; long p1275_cmd (char *service, long fmt, ...) { char *p, *q; unsigned long flags; int nargs, nrets, i; va_list list; long attrs, x; long ctx = 0; p = p1275buf.prom_buffer; ctx = spitfire_get_primary_context (); if (ctx) { flushw_user (); spitfire_set_primary_context (0); } spin_lock_irqsave(&prom_entry_lock, flags); p1275buf.prom_args[0] = (unsigned long)p; /* service */ strcpy (p, service); p = (char *)(((long)(strchr (p, 0) + 8)) & ~7); p1275buf.prom_args[1] = nargs = (fmt & 0x0f); /* nargs */ p1275buf.prom_args[2] = nrets = ((fmt & 0xf0) >> 4); /* nrets */ attrs = fmt >> 8; va_start(list, fmt); for (i = 0; i < nargs; i++, attrs >>= 3) { switch (attrs & 0x7) { case P1275_ARG_NUMBER: p1275buf.prom_args[i + 3] = (unsigned)va_arg(list, long); break; case P1275_ARG_IN_64B: p1275buf.prom_args[i + 3] = va_arg(list, unsigned long); break; case P1275_ARG_IN_STRING: strcpy (p, va_arg(list, char *)); p1275buf.prom_args[i + 3] = (unsigned long)p; p = (char *)(((long)(strchr (p, 0) + 8)) & ~7); break; case P1275_ARG_OUT_BUF: (void) va_arg(list, char *); p1275buf.prom_args[i + 3] = (unsigned long)p; x = va_arg(list, long); i++; attrs >>= 3; p = (char *)(((long)(p + (int)x + 7)) & ~7); p1275buf.prom_args[i + 3] = x; break; case P1275_ARG_IN_BUF: q = va_arg(list, char *); p1275buf.prom_args[i + 3] = (unsigned long)p; x = va_arg(list, long); i++; attrs >>= 3; memcpy (p, q, (int)x); p = (char *)(((long)(p + (int)x + 7)) & ~7); p1275buf.prom_args[i + 3] = x; break; case P1275_ARG_OUT_32B: (void) va_arg(list, char *); p1275buf.prom_args[i + 3] = (unsigned long)p; p += 32; break; case P1275_ARG_IN_FUNCTION: p1275buf.prom_args[i + 3] = (unsigned long)prom_cif_callback; p1275buf.prom_callback = va_arg(list, long); break; } } va_end(list); prom_world(1); prom_cif_interface(); prom_world(0); attrs = fmt >> 8; va_start(list, fmt); for (i = 0; i < nargs; i++, attrs >>= 3) { switch (attrs & 0x7) { case P1275_ARG_NUMBER: (void) va_arg(list, long); break; case P1275_ARG_IN_STRING: (void) va_arg(list, char *); break; case P1275_ARG_IN_FUNCTION: (void) va_arg(list, long); break; case P1275_ARG_IN_BUF: (void) va_arg(list, char *); (void) va_arg(list, long); i++; attrs >>= 3; break; case P1275_ARG_OUT_BUF: p = va_arg(list, char *); x = va_arg(list, long); memcpy (p, (char *)(p1275buf.prom_args[i + 3]), (int)x); i++; attrs >>= 3; break; case P1275_ARG_OUT_32B: p = va_arg(list, char *); memcpy (p, (char *)(p1275buf.prom_args[i + 3]), 32); break; } } va_end(list); x = p1275buf.prom_args [nargs + 3]; spin_unlock_irqrestore(&prom_entry_lock, flags); if (ctx) spitfire_set_primary_context (ctx); return x; } void prom_cif_init(void *cif_handler, void *cif_stack) { p1275buf.prom_cif_handler = (void (*)(long *))cif_handler; p1275buf.prom_cif_stack = (unsigned long)cif_stack; } |