arch/ia64/hp/sim/boot/fw-emu.c

   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
  17 #include "ssc.h"
  18
  19 #define MB      (1024*1024UL)
  20
  21 #define SIMPLE_MEMMAP   1
  22
  23 #if SIMPLE_MEMMAP
  24 # define NUM_MEM_DESCS  4
  25 #else
  26 # define NUM_MEM_DESCS  16
  27 #endif
  28
  29 static char fw_mem[(  sizeof(struct ia64_boot_param)
  30                     + sizeof(efi_system_table_t)
  31                     + sizeof(efi_runtime_services_t)
  32                     + 1*sizeof(efi_config_table_t)
  33                     + sizeof(struct ia64_sal_systab)
  34                     + sizeof(struct ia64_sal_desc_entry_point)
  35                     + NUM_MEM_DESCS*(sizeof(efi_memory_desc_t))
  36                     + 1024)] __attribute__ ((aligned (8)));
  37
  38 #define SECS_PER_HOUR   (60 * 60)
  39 #define SECS_PER_DAY    (SECS_PER_HOUR * 24)
  40
  41 /* Compute the `struct tm' representation of *T,
  42    offset OFFSET seconds east of UTC,
  43    and store year, yday, mon, mday, wday, hour, min, sec into *TP.
  44    Return nonzero if successful.  */
  45 int
  46 offtime (unsigned long t, efi_time_t *tp)
  47 {
  48         const unsigned short int __mon_yday[2][13] =
  49         {
  50                 /* Normal years.  */
  51                 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
  52                 /* Leap years.  */
  53                 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
  54         };
  55         long int days, rem, y;
  56         const unsigned short int *ip;
  57
  58         days = t / SECS_PER_DAY;
  59         rem = t % SECS_PER_DAY;
  60         while (rem < 0) {
  61                 rem += SECS_PER_DAY;
  62                 --days;
  63         }
  64         while (rem >= SECS_PER_DAY) {
  65                 rem -= SECS_PER_DAY;
  66                 ++days;
  67         }
  68         tp->hour = rem / SECS_PER_HOUR;
  69         rem %= SECS_PER_HOUR;
  70         tp->minute = rem / 60;
  71         tp->second = rem % 60;
  72         /* January 1, 1970 was a Thursday.  */
  73         y = 1970;
  74
  75 #       define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
  76 #       define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
  77 #       define __isleap(year) \
  78           ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
  79
  80         while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
  81                 /* Guess a corrected year, assuming 365 days per year.  */
  82                 long int yg = y + days / 365 - (days % 365 < 0);
  83
  84                 /* Adjust DAYS and Y to match the guessed year.  */
  85                 days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
  86                          - LEAPS_THRU_END_OF (y - 1));
  87                 y = yg;
  88         }
  89         tp->year = y;
  90         ip = __mon_yday[__isleap(y)];
  91         for (y = 11; days < (long int) ip[y]; --y)
  92                 continue;
  93         days -= ip[y];
  94         tp->month = y + 1;
  95         tp->day = days + 1;
  96         return 1;
  97 }
  98
  99 extern void pal_emulator_static (void);
 100
 101 /* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */
 102
 103 #define BUILD_CMD(addr)         ((0x80000000 | (addr)) & ~3)
 104
 105 #define REG_OFFSET(addr)        (0x00000000000000FF & (addr))
 106 #define DEVICE_FUNCTION(addr)   (0x000000000000FF00 & (addr))
 107 #define BUS_NUMBER(addr)        (0x0000000000FF0000 & (addr))
 108
 109 static efi_status_t
 110 fw_efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
 111 {
 112 #if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
 113         struct {
 114                 int tv_sec;     /* must be 32bits to work */
 115                 int tv_usec;
 116         } tv32bits;
 117
 118         ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD);
 119
 120         memset(tm, 0, sizeof(*tm));
 121         offtime(tv32bits.tv_sec, tm);
 122
 123         if (tc)
 124                 memset(tc, 0, sizeof(*tc));
 125 #else
 126 #       error Not implemented yet...
 127 #endif
 128         return EFI_SUCCESS;
 129 }
 130
 131 static void
 132 efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
 133 {
 134 #if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
 135         ssc(status, 0, 0, 0, SSC_EXIT);
 136 #else
 137 #       error Not implemented yet...
 138 #endif
 139 }
 140
 141 static efi_status_t
 142 efi_unimplemented (void)
 143 {
 144         return EFI_UNSUPPORTED;
 145 }
 146
 147 static struct sal_ret_values
 148 sal_emulator (long index, unsigned long in1, unsigned long in2,
 149               unsigned long in3, unsigned long in4, unsigned long in5,
 150               unsigned long in6, unsigned long in7)
 151 {
 152         long r9  = 0;
 153         long r10 = 0;
 154         long r11 = 0;
 155         long status;
 156
 157         /*
 158          * Don't do a "switch" here since that gives us code that
 159          * isn't self-relocatable.
 160          */
 161         status = 0;
 162         if (index == SAL_FREQ_BASE) {
 163                 switch (in1) {
 164                       case SAL_FREQ_BASE_PLATFORM:
 165                         r9 = 200000000;
 166                         break;
 167
 168                       case SAL_FREQ_BASE_INTERVAL_TIMER:
 169                         /*
 170                          * Is this supposed to be the cr.itc frequency
 171                          * or something platform specific?  The SAL
 172                          * doc ain't exactly clear on this...
 173                          */
 174                         r9 = 700000000;
 175                         break;
 176
 177                       case SAL_FREQ_BASE_REALTIME_CLOCK:
 178                         r9 = 1;
 179                         break;
 180
 181                       default:
 182                         status = -1;
 183                         break;
 184                 }
 185         } else if (index == SAL_SET_VECTORS) {
 186                 ;
 187         } else if (index == SAL_GET_STATE_INFO) {
 188                 ;
 189         } else if (index == SAL_GET_STATE_INFO_SIZE) {
 190                 ;
 191         } else if (index == SAL_CLEAR_STATE_INFO) {
 192                 ;
 193         } else if (index == SAL_MC_RENDEZ) {
 194                 ;
 195         } else if (index == SAL_MC_SET_PARAMS) {
 196                 ;
 197         } else if (index == SAL_CACHE_FLUSH) {
 198                 ;
 199         } else if (index == SAL_CACHE_INIT) {
 200                 ;
 201 #ifdef CONFIG_PCI
 202         } else if (index == SAL_PCI_CONFIG_READ) {
 203                 /*
 204                  * in1 contains the PCI configuration address and in2
 205                  * the size of the read.  The value that is read is
 206                  * returned via the general register r9.
 207                  */
 208                 outl(BUILD_CMD(in1), 0xCF8);
 209                 if (in2 == 1)                           /* Reading byte  */
 210                         r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3)));
 211                 else if (in2 == 2)                      /* Reading word  */
 212                         r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2)));
 213                 else                                    /* Reading dword */
 214                         r9 = inl(0xCFC);
 215                 status = PCIBIOS_SUCCESSFUL;
 216         } else if (index == SAL_PCI_CONFIG_WRITE) {
 217                 /*
 218                  * in1 contains the PCI configuration address, in2 the
 219                  * size of the write, and in3 the actual value to be
 220                  * written out.
 221                  */
 222                 outl(BUILD_CMD(in1), 0xCF8);
 223                 if (in2 == 1)                           /* Writing byte  */
 224                         outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3)));
 225                 else if (in2 == 2)                      /* Writing word  */
 226                         outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2)));
 227                 else                                    /* Writing dword */
 228                         outl(in3, 0xCFC);
 229                 status = PCIBIOS_SUCCESSFUL;
 230 #endif /* CONFIG_PCI */
 231         } else if (index == SAL_UPDATE_PAL) {
 232                 ;
 233         } else {
 234                 status = -1;
 235         }
 236         return ((struct sal_ret_values) {status, r9, r10, r11});
 237 }
 238
 239 struct ia64_boot_param *
 240 sys_fw_init (const char *args, int arglen)
 241 {
 242         efi_system_table_t *efi_systab;
 243         efi_runtime_services_t *efi_runtime;
 244         efi_config_table_t *efi_tables;
 245         struct ia64_sal_systab *sal_systab;
 246         efi_memory_desc_t *efi_memmap, *md;
 247         unsigned long *pal_desc, *sal_desc;
 248         struct ia64_sal_desc_entry_point *sal_ed;
 249         struct ia64_boot_param *bp;
 250         unsigned char checksum = 0;
 251         char *cp, *cmd_line;
 252         int i = 0;
 253 #       define MAKE_MD(typ, attr, start, end)           \
 254         do {                                            \
 255                 md = efi_memmap + i++;                  \
 256                 md->type = typ;                         \
 257                 md->pad = 0;                            \
 258                 md->phys_addr = start;                  \
 259                 md->virt_addr = 0;                      \
 260                 md->num_pages = (end - start) >> 12;    \
 261                 md->attribute = attr;                   \
 262         } while (0)
 263
 264         memset(fw_mem, 0, sizeof(fw_mem));
 265
 266         pal_desc = (unsigned long *) &pal_emulator_static;
 267         sal_desc = (unsigned long *) &sal_emulator;
 268
 269         cp = fw_mem;
 270         efi_systab  = (void *) cp; cp += sizeof(*efi_systab);
 271         efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
 272         efi_tables  = (void *) cp; cp += sizeof(*efi_tables);
 273         sal_systab  = (void *) cp; cp += sizeof(*sal_systab);
 274         sal_ed      = (void *) cp; cp += sizeof(*sal_ed);
 275         efi_memmap  = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap);
 276         bp          = (void *) cp; cp += sizeof(*bp);
 277         cmd_line    = (void *) cp;
 278
 279         if (args) {
 280                 if (arglen >= 1024)
 281                         arglen = 1023;
 282                 memcpy(cmd_line, args, arglen);
 283         } else {
 284                 arglen = 0;
 285         }
 286         cmd_line[arglen] = '\0';
 287
 288         memset(efi_systab, 0, sizeof(efi_systab));
 289         efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
 290         efi_systab->hdr.revision  = ((1 << 16) | 00);
 291         efi_systab->hdr.headersize = sizeof(efi_systab->hdr);
 292         efi_systab->fw_vendor = __pa("H\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0");
 293         efi_systab->fw_revision = 1;
 294         efi_systab->runtime = (void *) __pa(efi_runtime);
 295         efi_systab->nr_tables = 1;
 296         efi_systab->tables = __pa(efi_tables);
 297
 298         efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE;
 299         efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION;
 300         efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr);
 301         efi_runtime->get_time = __pa(&fw_efi_get_time);
 302         efi_runtime->set_time = __pa(&efi_unimplemented);
 303         efi_runtime->get_wakeup_time = __pa(&efi_unimplemented);
 304         efi_runtime->set_wakeup_time = __pa(&efi_unimplemented);
 305         efi_runtime->set_virtual_address_map = __pa(&efi_unimplemented);
 306         efi_runtime->get_variable = __pa(&efi_unimplemented);
 307         efi_runtime->get_next_variable = __pa(&efi_unimplemented);
 308         efi_runtime->set_variable = __pa(&efi_unimplemented);
 309         efi_runtime->get_next_high_mono_count = __pa(&efi_unimplemented);
 310         efi_runtime->reset_system = __pa(&efi_reset_system);
 311
 312         efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
 313         efi_tables->table = __pa(sal_systab);
 314
 315         /* fill in the SAL system table: */
 316         memcpy(sal_systab->signature, "SST_", 4);
 317         sal_systab->size = sizeof(*sal_systab);
 318         sal_systab->sal_rev_minor = 1;
 319         sal_systab->sal_rev_major = 0;
 320         sal_systab->entry_count = 1;
 321
 322 #ifdef CONFIG_IA64_GENERIC
 323         strcpy(sal_systab->oem_id, "Generic");
 324         strcpy(sal_systab->product_id, "IA-64 system");
 325 #endif
 326
 327 #ifdef CONFIG_IA64_HP_SIM
 328         strcpy(sal_systab->oem_id, "Hewlett-Packard");
 329         strcpy(sal_systab->product_id, "HP-simulator");
 330 #endif
 331
 332 #ifdef CONFIG_IA64_SDV
 333         strcpy(sal_systab->oem_id, "Intel");
 334         strcpy(sal_systab->product_id, "SDV");
 335 #endif
 336
 337         /* fill in an entry point: */
 338         sal_ed->type = SAL_DESC_ENTRY_POINT;
 339         sal_ed->pal_proc = __pa(pal_desc[0]);
 340         sal_ed->sal_proc = __pa(sal_desc[0]);
 341         sal_ed->gp = __pa(sal_desc[1]);
 342
 343         for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
 344                 checksum += *cp;
 345
 346         sal_systab->checksum = -checksum;
 347
 348 #if SIMPLE_MEMMAP
 349         /* simulate free memory at physical address zero */
 350         MAKE_MD(EFI_BOOT_SERVICES_DATA,         EFI_MEMORY_WB,    0*MB,    1*MB);
 351         MAKE_MD(EFI_PAL_CODE,                   EFI_MEMORY_WB,    1*MB,    2*MB);
 352         MAKE_MD(EFI_CONVENTIONAL_MEMORY,        EFI_MEMORY_WB,    2*MB,  130*MB);
 353         MAKE_MD(EFI_CONVENTIONAL_MEMORY,        EFI_MEMORY_WB, 4096*MB, 4128*MB);
 354 #else
 355         MAKE_MD( 4,                0x9, 0x0000000000000000, 0x0000000000001000);
 356         MAKE_MD( 7,                0x9, 0x0000000000001000, 0x000000000008a000);
 357         MAKE_MD( 4,                0x9, 0x000000000008a000, 0x00000000000a0000);
 358         MAKE_MD( 5, 0x8000000000000009, 0x00000000000c0000, 0x0000000000100000);
 359         MAKE_MD( 7,                0x9, 0x0000000000100000, 0x0000000004400000);
 360         MAKE_MD( 2,                0x9, 0x0000000004400000, 0x0000000004be5000);
 361         MAKE_MD( 7,                0x9, 0x0000000004be5000, 0x000000007f77e000);
 362         MAKE_MD( 6, 0x8000000000000009, 0x000000007f77e000, 0x000000007fb94000);
 363         MAKE_MD( 6, 0x8000000000000009, 0x000000007fb94000, 0x000000007fb95000);
 364         MAKE_MD( 6, 0x8000000000000009, 0x000000007fb95000, 0x000000007fc00000);
 365         MAKE_MD(13, 0x8000000000000009, 0x000000007fc00000, 0x000000007fc3a000);
 366         MAKE_MD( 7,                0x9, 0x000000007fc3a000, 0x000000007fea0000);
 367         MAKE_MD( 5, 0x8000000000000009, 0x000000007fea0000, 0x000000007fea8000);
 368         MAKE_MD( 7,                0x9, 0x000000007fea8000, 0x000000007feab000);
 369         MAKE_MD( 5, 0x8000000000000009, 0x000000007feab000, 0x000000007ffff000);
 370         MAKE_MD( 7,                0x9, 0x00000000ff400000, 0x0000000104000000);
 371 #endif
 372
 373         bp->efi_systab = __pa(&fw_mem);
 374         bp->efi_memmap = __pa(efi_memmap);
 375         bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t);
 376         bp->efi_memdesc_size = sizeof(efi_memory_desc_t);
 377         bp->efi_memdesc_version = 1;
 378         bp->command_line = __pa(cmd_line);
 379         bp->console_info.num_cols = 80;
 380         bp->console_info.num_rows = 25;
 381         bp->console_info.orig_x = 0;
 382         bp->console_info.orig_y = 24;
 383         bp->fpswa = 0;
 384
 385         return bp;
 386 }