1/* 2 * PAL & SAL emulation. 3 * 4 * Copyright (C) 1998-2001 Hewlett-Packard Co 5 * David Mosberger-Tang <davidm@hpl.hp.com> 6 */ 7 8#ifdef CONFIG_PCI 9# include <linux/pci.h> 10#endif 11 12#include <linux/efi.h> 13#include <asm/io.h> 14#include <asm/pal.h> 15#include <asm/sal.h> 16#include <asm/setup.h> 17 18#include "ssc.h" 19 20#define MB (1024*1024UL) 21 22#define SIMPLE_MEMMAP 1 23 24#if SIMPLE_MEMMAP 25# define NUM_MEM_DESCS 4 26#else 27# define NUM_MEM_DESCS 16 28#endif 29 30static char fw_mem[( sizeof(struct ia64_boot_param) 31 + sizeof(efi_system_table_t) 32 + sizeof(efi_runtime_services_t) 33 + 1*sizeof(efi_config_table_t) 34 + sizeof(struct ia64_sal_systab) 35 + sizeof(struct ia64_sal_desc_entry_point) 36 + NUM_MEM_DESCS*(sizeof(efi_memory_desc_t)) 37 + 1024)] __attribute__ ((aligned (8))); 38 39#define SECS_PER_HOUR (60 * 60) 40#define SECS_PER_DAY (SECS_PER_HOUR * 24) 41 42/* Compute the `struct tm' representation of *T, 43 offset OFFSET seconds east of UTC, 44 and store year, yday, mon, mday, wday, hour, min, sec into *TP. 45 Return nonzero if successful. */ 46int 47offtime (unsigned long t, efi_time_t *tp) 48{ 49 const unsigned short int __mon_yday[2][13] = 50 { 51 /* Normal years. */ 52 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, 53 /* Leap years. */ 54 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } 55 }; 56 long int days, rem, y; 57 const unsigned short int *ip; 58 59 days = t / SECS_PER_DAY; 60 rem = t % SECS_PER_DAY; 61 while (rem < 0) { 62 rem += SECS_PER_DAY; 63 --days; 64 } 65 while (rem >= SECS_PER_DAY) { 66 rem -= SECS_PER_DAY; 67 ++days; 68 } 69 tp->hour = rem / SECS_PER_HOUR; 70 rem %= SECS_PER_HOUR; 71 tp->minute = rem / 60; 72 tp->second = rem % 60; 73 /* January 1, 1970 was a Thursday. */ 74 y = 1970; 75 76# define DIV(a, b) ((a) / (b) - ((a) % (b) < 0)) 77# define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400)) 78# define __isleap(year) \ 79 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) 80 81 while (days < 0 || days >= (__isleap (y) ? 366 : 365)) { 82 /* Guess a corrected year, assuming 365 days per year. */ 83 long int yg = y + days / 365 - (days % 365 < 0); 84 85 /* Adjust DAYS and Y to match the guessed year. */ 86 days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1) 87 - LEAPS_THRU_END_OF (y - 1)); 88 y = yg; 89 } 90 tp->year = y; 91 ip = __mon_yday[__isleap(y)]; 92 for (y = 11; days < (long int) ip[y]; --y) 93 continue; 94 days -= ip[y]; 95 tp->month = y + 1; 96 tp->day = days + 1; 97 return 1; 98} 99 100extern void pal_emulator_static (void); 101 102/* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */ 103 104#define BUILD_CMD(addr) ((0x80000000 | (addr)) & ~3) 105 106#define REG_OFFSET(addr) (0x00000000000000FF & (addr)) 107#define DEVICE_FUNCTION(addr) (0x000000000000FF00 & (addr)) 108#define BUS_NUMBER(addr) (0x0000000000FF0000 & (addr)) 109 110static efi_status_t 111fw_efi_get_time (efi_time_t *tm, efi_time_cap_t *tc) 112{ 113#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC) 114 struct { 115 int tv_sec; /* must be 32bits to work */ 116 int tv_usec; 117 } tv32bits; 118 119 ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD); 120 121 memset(tm, 0, sizeof(*tm)); 122 offtime(tv32bits.tv_sec, tm); 123 124 if (tc) 125 memset(tc, 0, sizeof(*tc)); 126#else 127# error Not implemented yet... 128#endif 129 return EFI_SUCCESS; 130} 131 132static void 133efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data) 134{ 135#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC) 136 ssc(status, 0, 0, 0, SSC_EXIT); 137#else 138# error Not implemented yet... 139#endif 140} 141 142static efi_status_t 143efi_unimplemented (void) 144{ 145 return EFI_UNSUPPORTED; 146} 147 148static struct sal_ret_values 149sal_emulator (long index, unsigned long in1, unsigned long in2, 150 unsigned long in3, unsigned long in4, unsigned long in5, 151 unsigned long in6, unsigned long in7) 152{ 153 long r9 = 0; 154 long r10 = 0; 155 long r11 = 0; 156 long status; 157 158 /* 159 * Don't do a "switch" here since that gives us code that 160 * isn't self-relocatable. 161 */ 162 status = 0; 163 if (index == SAL_FREQ_BASE) { 164 if (in1 == SAL_FREQ_BASE_PLATFORM) 165 r9 = 200000000; 166 else if (in1 == SAL_FREQ_BASE_INTERVAL_TIMER) { 167 /* 168 * Is this supposed to be the cr.itc frequency 169 * or something platform specific? The SAL 170 * doc ain't exactly clear on this... 171 */ 172 r9 = 700000000; 173 } else if (in1 == SAL_FREQ_BASE_REALTIME_CLOCK) 174 r9 = 1; 175 else 176 status = -1; 177 } else if (index == SAL_SET_VECTORS) { 178 ; 179 } else if (index == SAL_GET_STATE_INFO) { 180 ; 181 } else if (index == SAL_GET_STATE_INFO_SIZE) { 182 ; 183 } else if (index == SAL_CLEAR_STATE_INFO) { 184 ; 185 } else if (index == SAL_MC_RENDEZ) { 186 ; 187 } else if (index == SAL_MC_SET_PARAMS) { 188 ; 189 } else if (index == SAL_CACHE_FLUSH) { 190 ; 191 } else if (index == SAL_CACHE_INIT) { 192 ; 193#ifdef CONFIG_PCI 194 } else if (index == SAL_PCI_CONFIG_READ) { 195 /* 196 * in1 contains the PCI configuration address and in2 197 * the size of the read. The value that is read is 198 * returned via the general register r9. 199 */ 200 outl(BUILD_CMD(in1), 0xCF8); 201 if (in2 == 1) /* Reading byte */ 202 r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3))); 203 else if (in2 == 2) /* Reading word */ 204 r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2))); 205 else /* Reading dword */ 206 r9 = inl(0xCFC); 207 status = PCIBIOS_SUCCESSFUL; 208 } else if (index == SAL_PCI_CONFIG_WRITE) { 209 /* 210 * in1 contains the PCI configuration address, in2 the 211 * size of the write, and in3 the actual value to be 212 * written out. 213 */ 214 outl(BUILD_CMD(in1), 0xCF8); 215 if (in2 == 1) /* Writing byte */ 216 outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3))); 217 else if (in2 == 2) /* Writing word */ 218 outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2))); 219 else /* Writing dword */ 220 outl(in3, 0xCFC); 221 status = PCIBIOS_SUCCESSFUL; 222#endif /* CONFIG_PCI */ 223 } else if (index == SAL_UPDATE_PAL) { 224 ; 225 } else { 226 status = -1; 227 } 228 return ((struct sal_ret_values) {status, r9, r10, r11}); 229} 230 231struct ia64_boot_param * 232sys_fw_init (const char *args, int arglen) 233{ 234 efi_system_table_t *efi_systab; 235 efi_runtime_services_t *efi_runtime; 236 efi_config_table_t *efi_tables; 237 struct ia64_sal_systab *sal_systab; 238 efi_memory_desc_t *efi_memmap, *md; 239 unsigned long *pal_desc, *sal_desc; 240 struct ia64_sal_desc_entry_point *sal_ed; 241 struct ia64_boot_param *bp; 242 unsigned char checksum = 0; 243 char *cp, *cmd_line; 244 int i = 0; 245# define MAKE_MD(typ, attr, start, end) \ 246 do { \ 247 md = efi_memmap + i++; \ 248 md->type = typ; \ 249 md->pad = 0; \ 250 md->phys_addr = start; \ 251 md->virt_addr = 0; \ 252 md->num_pages = (end - start) >> 12; \ 253 md->attribute = attr; \ 254 } while (0) 255 256 memset(fw_mem, 0, sizeof(fw_mem)); 257 258 pal_desc = (unsigned long *) &pal_emulator_static; 259 sal_desc = (unsigned long *) &sal_emulator; 260 261 cp = fw_mem; 262 efi_systab = (void *) cp; cp += sizeof(*efi_systab); 263 efi_runtime = (void *) cp; cp += sizeof(*efi_runtime); 264 efi_tables = (void *) cp; cp += sizeof(*efi_tables); 265 sal_systab = (void *) cp; cp += sizeof(*sal_systab); 266 sal_ed = (void *) cp; cp += sizeof(*sal_ed); 267 efi_memmap = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap); 268 bp = (void *) cp; cp += sizeof(*bp); 269 cmd_line = (void *) cp; 270 271 if (args) { 272 if (arglen >= 1024) 273 arglen = 1023; 274 memcpy(cmd_line, args, arglen); 275 } else { 276 arglen = 0; 277 } 278 cmd_line[arglen] = '\0'; 279 280 memset(efi_systab, 0, sizeof(*efi_systab)); 281 efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE; 282 efi_systab->hdr.revision = ((1 << 16) | 00); 283 efi_systab->hdr.headersize = sizeof(efi_systab->hdr); 284 efi_systab->fw_vendor = __pa("H\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0"); 285 efi_systab->fw_revision = 1; 286 efi_systab->runtime = (void *) __pa(efi_runtime); 287 efi_systab->nr_tables = 1; 288 efi_systab->tables = __pa(efi_tables); 289 290 efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE; 291 efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION; 292 efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr); 293 efi_runtime->get_time = (void *)__pa(&fw_efi_get_time); 294 efi_runtime->set_time = (void *)__pa(&efi_unimplemented); 295 efi_runtime->get_wakeup_time = (void *)__pa(&efi_unimplemented); 296 efi_runtime->set_wakeup_time = (void *)__pa(&efi_unimplemented); 297 efi_runtime->set_virtual_address_map = (void *)__pa(&efi_unimplemented); 298 efi_runtime->get_variable = (void *)__pa(&efi_unimplemented); 299 efi_runtime->get_next_variable = (void *)__pa(&efi_unimplemented); 300 efi_runtime->set_variable = (void *)__pa(&efi_unimplemented); 301 efi_runtime->get_next_high_mono_count = (void *)__pa(&efi_unimplemented); 302 efi_runtime->reset_system = (void *)__pa(&efi_reset_system); 303 304 efi_tables->guid = SAL_SYSTEM_TABLE_GUID; 305 efi_tables->table = __pa(sal_systab); 306 307 /* fill in the SAL system table: */ 308 memcpy(sal_systab->signature, "SST_", 4); 309 sal_systab->size = sizeof(*sal_systab); 310 sal_systab->sal_rev_minor = 1; 311 sal_systab->sal_rev_major = 0; 312 sal_systab->entry_count = 1; 313 314#ifdef CONFIG_IA64_GENERIC 315 strcpy(sal_systab->oem_id, "Generic"); 316 strcpy(sal_systab->product_id, "IA-64 system"); 317#endif 318 319#ifdef CONFIG_IA64_HP_SIM 320 strcpy(sal_systab->oem_id, "Hewlett-Packard"); 321 strcpy(sal_systab->product_id, "HP-simulator"); 322#endif 323 324 /* fill in an entry point: */ 325 sal_ed->type = SAL_DESC_ENTRY_POINT; 326 sal_ed->pal_proc = __pa(pal_desc[0]); 327 sal_ed->sal_proc = __pa(sal_desc[0]); 328 sal_ed->gp = __pa(sal_desc[1]); 329 330 for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp) 331 checksum += *cp; 332 333 sal_systab->checksum = -checksum; 334 335#if SIMPLE_MEMMAP 336 /* simulate free memory at physical address zero */ 337 MAKE_MD(EFI_BOOT_SERVICES_DATA, EFI_MEMORY_WB, 0*MB, 1*MB); 338 MAKE_MD(EFI_PAL_CODE, EFI_MEMORY_WB, 1*MB, 2*MB); 339 MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 2*MB, 130*MB); 340 MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 4096*MB, 4128*MB); 341#else 342 MAKE_MD( 4, 0x9, 0x0000000000000000, 0x0000000000001000); 343 MAKE_MD( 7, 0x9, 0x0000000000001000, 0x000000000008a000); 344 MAKE_MD( 4, 0x9, 0x000000000008a000, 0x00000000000a0000); 345 MAKE_MD( 5, 0x8000000000000009, 0x00000000000c0000, 0x0000000000100000); 346 MAKE_MD( 7, 0x9, 0x0000000000100000, 0x0000000004400000); 347 MAKE_MD( 2, 0x9, 0x0000000004400000, 0x0000000004be5000); 348 MAKE_MD( 7, 0x9, 0x0000000004be5000, 0x000000007f77e000); 349 MAKE_MD( 6, 0x8000000000000009, 0x000000007f77e000, 0x000000007fb94000); 350 MAKE_MD( 6, 0x8000000000000009, 0x000000007fb94000, 0x000000007fb95000); 351 MAKE_MD( 6, 0x8000000000000009, 0x000000007fb95000, 0x000000007fc00000); 352 MAKE_MD(13, 0x8000000000000009, 0x000000007fc00000, 0x000000007fc3a000); 353 MAKE_MD( 7, 0x9, 0x000000007fc3a000, 0x000000007fea0000); 354 MAKE_MD( 5, 0x8000000000000009, 0x000000007fea0000, 0x000000007fea8000); 355 MAKE_MD( 7, 0x9, 0x000000007fea8000, 0x000000007feab000); 356 MAKE_MD( 5, 0x8000000000000009, 0x000000007feab000, 0x000000007ffff000); 357 MAKE_MD( 7, 0x9, 0x00000000ff400000, 0x0000000104000000); 358#endif 359 360 bp->efi_systab = __pa(&fw_mem); 361 bp->efi_memmap = __pa(efi_memmap); 362 bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t); 363 bp->efi_memdesc_size = sizeof(efi_memory_desc_t); 364 bp->efi_memdesc_version = 1; 365 bp->command_line = __pa(cmd_line); 366 bp->console_info.num_cols = 80; 367 bp->console_info.num_rows = 25; 368 bp->console_info.orig_x = 0; 369 bp->console_info.orig_y = 24; 370 bp->fpswa = 0; 371 372 return bp; 373} 374