LXR linux/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#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