err.no Git - linux-2.6/blob - arch/ia64/kernel/efi.c

   1 /*
   2  * Extensible Firmware Interface
   3  *
   4  * Based on Extensible Firmware Interface Specification version 0.9
   5  * April 30, 1999
   6  *
   7  * Copyright (C) 1999 VA Linux Systems
   8  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
   9  * Copyright (C) 1999-2003 Hewlett-Packard Co.
  10  *      David Mosberger-Tang <davidm@hpl.hp.com>
  11  *      Stephane Eranian <eranian@hpl.hp.com>
  12  * (c) Copyright 2006 Hewlett-Packard Development Company, L.P.
  13  *      Bjorn Helgaas <bjorn.helgaas@hp.com>
  14  *
  15  * All EFI Runtime Services are not implemented yet as EFI only
  16  * supports physical mode addressing on SoftSDV. This is to be fixed
  17  * in a future version.  --drummond 1999-07-20
  18  *
  19  * Implemented EFI runtime services and virtual mode calls.  --davidm
  20  *
  21  * Goutham Rao: <goutham.rao@intel.com>
  22  *      Skip non-WB memory and ignore empty memory ranges.
  23  */
  24 #include <linux/module.h>
  25 #include <linux/bootmem.h>
  26 #include <linux/kernel.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/time.h>
  30 #include <linux/efi.h>
  31 #include <linux/kexec.h>
  32 #include <linux/mm.h>
  33
  34 #include <asm/io.h>
  35 #include <asm/kregs.h>
  36 #include <asm/meminit.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/processor.h>
  39 #include <asm/mca.h>
  40
  41 #define EFI_DEBUG       0
  42
  43 extern efi_status_t efi_call_phys (void *, ...);
  44
  45 struct efi efi;
  46 EXPORT_SYMBOL(efi);
  47 static efi_runtime_services_t *runtime;
  48 static unsigned long mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL;
  49
  50 #define efi_call_virt(f, args...)       (*(f))(args)
  51
  52 #define STUB_GET_TIME(prefix, adjust_arg)                                      \
  53 static efi_status_t                                                            \
  54 prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc)                         \
  55 {                                                                              \
  56         struct ia64_fpreg fr[6];                                               \
  57         efi_time_cap_t *atc = NULL;                                            \
  58         efi_status_t ret;                                                      \
  59                                                                                \
  60         if (tc)                                                                \
  61                 atc = adjust_arg(tc);                                          \
  62         ia64_save_scratch_fpregs(fr);                                          \
  63         ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time),    \
  64                                 adjust_arg(tm), atc);                          \
  65         ia64_load_scratch_fpregs(fr);                                          \
  66         return ret;                                                            \
  67 }
  68
  69 #define STUB_SET_TIME(prefix, adjust_arg)                                      \
  70 static efi_status_t                                                            \
  71 prefix##_set_time (efi_time_t *tm)                                             \
  72 {                                                                              \
  73         struct ia64_fpreg fr[6];                                               \
  74         efi_status_t ret;                                                      \
  75                                                                                \
  76         ia64_save_scratch_fpregs(fr);                                          \
  77         ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time),    \
  78                                 adjust_arg(tm));                               \
  79         ia64_load_scratch_fpregs(fr);                                          \
  80         return ret;                                                            \
  81 }
  82
  83 #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg)                               \
  84 static efi_status_t                                                            \
  85 prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending,            \
  86                           efi_time_t *tm)                                      \
  87 {                                                                              \
  88         struct ia64_fpreg fr[6];                                               \
  89         efi_status_t ret;                                                      \
  90                                                                                \
  91         ia64_save_scratch_fpregs(fr);                                          \
  92         ret = efi_call_##prefix(                                               \
  93                 (efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time),      \
  94                 adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm));     \
  95         ia64_load_scratch_fpregs(fr);                                          \
  96         return ret;                                                            \
  97 }
  98
  99 #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg)                               \
 100 static efi_status_t                                                            \
 101 prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm)                  \
 102 {                                                                              \
 103         struct ia64_fpreg fr[6];                                               \
 104         efi_time_t *atm = NULL;                                                \
 105         efi_status_t ret;                                                      \
 106                                                                                \
 107         if (tm)                                                                \
 108                 atm = adjust_arg(tm);                                          \
 109         ia64_save_scratch_fpregs(fr);                                          \
 110         ret = efi_call_##prefix(                                               \
 111                 (efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time),      \
 112                 enabled, atm);                                                 \
 113         ia64_load_scratch_fpregs(fr);                                          \
 114         return ret;                                                            \
 115 }
 116
 117 #define STUB_GET_VARIABLE(prefix, adjust_arg)                                  \
 118 static efi_status_t                                                            \
 119 prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,      \
 120                        unsigned long *data_size, void *data)                   \
 121 {                                                                              \
 122         struct ia64_fpreg fr[6];                                               \
 123         u32 *aattr = NULL;                                                     \
 124         efi_status_t ret;                                                      \
 125                                                                                \
 126         if (attr)                                                              \
 127                 aattr = adjust_arg(attr);                                      \
 128         ia64_save_scratch_fpregs(fr);                                          \
 129         ret = efi_call_##prefix(                                               \
 130                 (efi_get_variable_t *) __va(runtime->get_variable),            \
 131                 adjust_arg(name), adjust_arg(vendor), aattr,                   \
 132                 adjust_arg(data_size), adjust_arg(data));                      \
 133         ia64_load_scratch_fpregs(fr);                                          \
 134         return ret;                                                            \
 135 }
 136
 137 #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg)                             \
 138 static efi_status_t                                                            \
 139 prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name,      \
 140                             efi_guid_t *vendor)                                \
 141 {                                                                              \
 142         struct ia64_fpreg fr[6];                                               \
 143         efi_status_t ret;                                                      \
 144                                                                                \
 145         ia64_save_scratch_fpregs(fr);                                          \
 146         ret = efi_call_##prefix(                                               \
 147                 (efi_get_next_variable_t *) __va(runtime->get_next_variable),  \
 148                 adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor));  \
 149         ia64_load_scratch_fpregs(fr);                                          \
 150         return ret;                                                            \
 151 }
 152
 153 #define STUB_SET_VARIABLE(prefix, adjust_arg)                                  \
 154 static efi_status_t                                                            \
 155 prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor,                 \
 156                        unsigned long attr, unsigned long data_size,            \
 157                        void *data)                                             \
 158 {                                                                              \
 159         struct ia64_fpreg fr[6];                                               \
 160         efi_status_t ret;                                                      \
 161                                                                                \
 162         ia64_save_scratch_fpregs(fr);                                          \
 163         ret = efi_call_##prefix(                                               \
 164                 (efi_set_variable_t *) __va(runtime->set_variable),            \
 165                 adjust_arg(name), adjust_arg(vendor), attr, data_size,         \
 166                 adjust_arg(data));                                             \
 167         ia64_load_scratch_fpregs(fr);                                          \
 168         return ret;                                                            \
 169 }
 170
 171 #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg)                      \
 172 static efi_status_t                                                            \
 173 prefix##_get_next_high_mono_count (u32 *count)                                 \
 174 {                                                                              \
 175         struct ia64_fpreg fr[6];                                               \
 176         efi_status_t ret;                                                      \
 177                                                                                \
 178         ia64_save_scratch_fpregs(fr);                                          \
 179         ret = efi_call_##prefix((efi_get_next_high_mono_count_t *)             \
 180                                 __va(runtime->get_next_high_mono_count),       \
 181                                 adjust_arg(count));                            \
 182         ia64_load_scratch_fpregs(fr);                                          \
 183         return ret;                                                            \
 184 }
 185
 186 #define STUB_RESET_SYSTEM(prefix, adjust_arg)                                  \
 187 static void                                                                    \
 188 prefix##_reset_system (int reset_type, efi_status_t status,                    \
 189                        unsigned long data_size, efi_char16_t *data)            \
 190 {                                                                              \
 191         struct ia64_fpreg fr[6];                                               \
 192         efi_char16_t *adata = NULL;                                            \
 193                                                                                \
 194         if (data)                                                              \
 195                 adata = adjust_arg(data);                                      \
 196                                                                                \
 197         ia64_save_scratch_fpregs(fr);                                          \
 198         efi_call_##prefix(                                                     \
 199                 (efi_reset_system_t *) __va(runtime->reset_system),            \
 200                 reset_type, status, data_size, adata);                         \
 201         /* should not return, but just in case... */                           \
 202         ia64_load_scratch_fpregs(fr);                                          \
 203 }
 204
 205 #define phys_ptr(arg)   ((__typeof__(arg)) ia64_tpa(arg))
 206
 207 STUB_GET_TIME(phys, phys_ptr)
 208 STUB_SET_TIME(phys, phys_ptr)
 209 STUB_GET_WAKEUP_TIME(phys, phys_ptr)
 210 STUB_SET_WAKEUP_TIME(phys, phys_ptr)
 211 STUB_GET_VARIABLE(phys, phys_ptr)
 212 STUB_GET_NEXT_VARIABLE(phys, phys_ptr)
 213 STUB_SET_VARIABLE(phys, phys_ptr)
 214 STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr)
 215 STUB_RESET_SYSTEM(phys, phys_ptr)
 216
 217 #define id(arg) arg
 218
 219 STUB_GET_TIME(virt, id)
 220 STUB_SET_TIME(virt, id)
 221 STUB_GET_WAKEUP_TIME(virt, id)
 222 STUB_SET_WAKEUP_TIME(virt, id)
 223 STUB_GET_VARIABLE(virt, id)
 224 STUB_GET_NEXT_VARIABLE(virt, id)
 225 STUB_SET_VARIABLE(virt, id)
 226 STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id)
 227 STUB_RESET_SYSTEM(virt, id)
 228
 229 void
 230 efi_gettimeofday (struct timespec *ts)
 231 {
 232         efi_time_t tm;
 233
 234         if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) {
 235                 memset(ts, 0, sizeof(*ts));
 236                 return;
 237         }
 238
 239         ts->tv_sec = mktime(tm.year, tm.month, tm.day,
 240                             tm.hour, tm.minute, tm.second);
 241         ts->tv_nsec = tm.nanosecond;
 242 }
 243
 244 static int
 245 is_memory_available (efi_memory_desc_t *md)
 246 {
 247         if (!(md->attribute & EFI_MEMORY_WB))
 248                 return 0;
 249
 250         switch (md->type) {
 251               case EFI_LOADER_CODE:
 252               case EFI_LOADER_DATA:
 253               case EFI_BOOT_SERVICES_CODE:
 254               case EFI_BOOT_SERVICES_DATA:
 255               case EFI_CONVENTIONAL_MEMORY:
 256                 return 1;
 257         }
 258         return 0;
 259 }
 260
 261 typedef struct kern_memdesc {
 262         u64 attribute;
 263         u64 start;
 264         u64 num_pages;
 265 } kern_memdesc_t;
 266
 267 static kern_memdesc_t *kern_memmap;
 268
 269 #define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT)
 270
 271 static inline u64
 272 kmd_end(kern_memdesc_t *kmd)
 273 {
 274         return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT));
 275 }
 276
 277 static inline u64
 278 efi_md_end(efi_memory_desc_t *md)
 279 {
 280         return (md->phys_addr + efi_md_size(md));
 281 }
 282
 283 static inline int
 284 efi_wb(efi_memory_desc_t *md)
 285 {
 286         return (md->attribute & EFI_MEMORY_WB);
 287 }
 288
 289 static inline int
 290 efi_uc(efi_memory_desc_t *md)
 291 {
 292         return (md->attribute & EFI_MEMORY_UC);
 293 }
 294
 295 static void
 296 walk (efi_freemem_callback_t callback, void *arg, u64 attr)
 297 {
 298         kern_memdesc_t *k;
 299         u64 start, end, voff;
 300
 301         voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET;
 302         for (k = kern_memmap; k->start != ~0UL; k++) {
 303                 if (k->attribute != attr)
 304                         continue;
 305                 start = PAGE_ALIGN(k->start);
 306                 end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK;
 307                 if (start < end)
 308                         if ((*callback)(start + voff, end + voff, arg) < 0)
 309                                 return;
 310         }
 311 }
 312
 313 /*
 314  * Walk the EFI memory map and call CALLBACK once for each EFI memory
 315  * descriptor that has memory that is available for OS use.
 316  */
 317 void
 318 efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
 319 {
 320         walk(callback, arg, EFI_MEMORY_WB);
 321 }
 322
 323 /*
 324  * Walk the EFI memory map and call CALLBACK once for each EFI memory
 325  * descriptor that has memory that is available for uncached allocator.
 326  */
 327 void
 328 efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg)
 329 {
 330         walk(callback, arg, EFI_MEMORY_UC);
 331 }
 332
 333 /*
 334  * Look for the PAL_CODE region reported by EFI and map it using an
 335  * ITR to enable safe PAL calls in virtual mode.  See IA-64 Processor
 336  * Abstraction Layer chapter 11 in ADAG
 337  */
 338 void *
 339 efi_get_pal_addr (void)
 340 {
 341         void *efi_map_start, *efi_map_end, *p;
 342         efi_memory_desc_t *md;
 343         u64 efi_desc_size;
 344         int pal_code_count = 0;
 345         u64 vaddr, mask;
 346
 347         efi_map_start = __va(ia64_boot_param->efi_memmap);
 348         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
 349         efi_desc_size = ia64_boot_param->efi_memdesc_size;
 350
 351         for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
 352                 md = p;
 353                 if (md->type != EFI_PAL_CODE)
 354                         continue;
 355
 356                 if (++pal_code_count > 1) {
 357                         printk(KERN_ERR "Too many EFI Pal Code memory ranges, "
 358                                "dropped @ %lx\n", md->phys_addr);
 359                         continue;
 360                 }
 361                 /*
 362                  * The only ITLB entry in region 7 that is used is the one
 363                  * installed by __start().  That entry covers a 64MB range.
 364                  */
 365                 mask  = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1);
 366                 vaddr = PAGE_OFFSET + md->phys_addr;
 367
 368                 /*
 369                  * We must check that the PAL mapping won't overlap with the
 370                  * kernel mapping.
 371                  *
 372                  * PAL code is guaranteed to be aligned on a power of 2 between
 373                  * 4k and 256KB and that only one ITR is needed to map it. This
 374                  * implies that the PAL code is always aligned on its size,
 375                  * i.e., the closest matching page size supported by the TLB.
 376                  * Therefore PAL code is guaranteed never to cross a 64MB unless
 377                  * it is bigger than 64MB (very unlikely!).  So for now the
 378                  * following test is enough to determine whether or not we need
 379                  * a dedicated ITR for the PAL code.
 380                  */
 381                 if ((vaddr & mask) == (KERNEL_START & mask)) {
 382                         printk(KERN_INFO "%s: no need to install ITR for "
 383                                "PAL code\n", __FUNCTION__);
 384                         continue;
 385                 }
 386
 387                 if (efi_md_size(md) > IA64_GRANULE_SIZE)
 388                         panic("Whoa!  PAL code size bigger than a granule!");
 389
 390 #if EFI_DEBUG
 391                 mask  = ~((1 << IA64_GRANULE_SHIFT) - 1);
 392
 393                 printk(KERN_INFO "CPU %d: mapping PAL code "
 394                        "[0x%lx-0x%lx) into [0x%lx-0x%lx)\n",
 395                        smp_processor_id(), md->phys_addr,
 396                        md->phys_addr + efi_md_size(md),
 397                        vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
 398 #endif
 399                 return __va(md->phys_addr);
 400         }
 401         printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n",
 402                __FUNCTION__);
 403         return NULL;
 404 }
 405
 406 void
 407 efi_map_pal_code (void)
 408 {
 409         void *pal_vaddr = efi_get_pal_addr ();
 410         u64 psr;
 411
 412         if (!pal_vaddr)
 413                 return;
 414
 415         /*
 416          * Cannot write to CRx with PSR.ic=1
 417          */
 418         psr = ia64_clear_ic();
 419         ia64_itr(0x1, IA64_TR_PALCODE,
 420                  GRANULEROUNDDOWN((unsigned long) pal_vaddr),
 421                  pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)),
 422                  IA64_GRANULE_SHIFT);
 423         ia64_set_psr(psr);              /* restore psr */
 424         ia64_srlz_i();
 425 }
 426
 427 void __init
 428 efi_init (void)
 429 {
 430         void *efi_map_start, *efi_map_end;
 431         efi_config_table_t *config_tables;
 432         efi_char16_t *c16;
 433         u64 efi_desc_size;
 434         char *cp, vendor[100] = "unknown";
 435         int i;
 436
 437         /*
 438          * It's too early to be able to use the standard kernel command line
 439          * support...
 440          */
 441         for (cp = boot_command_line; *cp; ) {
 442                 if (memcmp(cp, "mem=", 4) == 0) {
 443                         mem_limit = memparse(cp + 4, &cp);
 444                 } else if (memcmp(cp, "max_addr=", 9) == 0) {
 445                         max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp));
 446                 } else if (memcmp(cp, "min_addr=", 9) == 0) {
 447                         min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp));
 448                 } else {
 449                         while (*cp != ' ' && *cp)
 450                                 ++cp;
 451                         while (*cp == ' ')
 452                                 ++cp;
 453                 }
 454         }
 455         if (min_addr != 0UL)
 456                 printk(KERN_INFO "Ignoring memory below %luMB\n",
 457                        min_addr >> 20);
 458         if (max_addr != ~0UL)
 459                 printk(KERN_INFO "Ignoring memory above %luMB\n",
 460                        max_addr >> 20);
 461
 462         efi.systab = __va(ia64_boot_param->efi_systab);
 463
 464         /*
 465          * Verify the EFI Table
 466          */
 467         if (efi.systab == NULL)
 468                 panic("Whoa! Can't find EFI system table.\n");
 469         if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
 470                 panic("Whoa! EFI system table signature incorrect\n");
 471         if ((efi.systab->hdr.revision >> 16) == 0)
 472                 printk(KERN_WARNING "Warning: EFI system table version "
 473                        "%d.%02d, expected 1.00 or greater\n",
 474                        efi.systab->hdr.revision >> 16,
 475                        efi.systab->hdr.revision & 0xffff);
 476
 477         config_tables = __va(efi.systab->tables);
 478
 479         /* Show what we know for posterity */
 480         c16 = __va(efi.systab->fw_vendor);
 481         if (c16) {
 482                 for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i)
 483                         vendor[i] = *c16++;
 484                 vendor[i] = '\0';
 485         }
 486
 487         printk(KERN_INFO "EFI v%u.%.02u by %s:",
 488                efi.systab->hdr.revision >> 16,
 489                efi.systab->hdr.revision & 0xffff, vendor);
 490
 491         efi.mps        = EFI_INVALID_TABLE_ADDR;
 492         efi.acpi       = EFI_INVALID_TABLE_ADDR;
 493         efi.acpi20     = EFI_INVALID_TABLE_ADDR;
 494         efi.smbios     = EFI_INVALID_TABLE_ADDR;
 495         efi.sal_systab = EFI_INVALID_TABLE_ADDR;
 496         efi.boot_info  = EFI_INVALID_TABLE_ADDR;
 497         efi.hcdp       = EFI_INVALID_TABLE_ADDR;
 498         efi.uga        = EFI_INVALID_TABLE_ADDR;
 499
 500         for (i = 0; i < (int) efi.systab->nr_tables; i++) {
 501                 if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
 502                         efi.mps = config_tables[i].table;
 503                         printk(" MPS=0x%lx", config_tables[i].table);
 504                 } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) {
 505                         efi.acpi20 = config_tables[i].table;
 506                         printk(" ACPI 2.0=0x%lx", config_tables[i].table);
 507                 } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
 508                         efi.acpi = config_tables[i].table;
 509                         printk(" ACPI=0x%lx", config_tables[i].table);
 510                 } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
 511                         efi.smbios = config_tables[i].table;
 512                         printk(" SMBIOS=0x%lx", config_tables[i].table);
 513                 } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) {
 514                         efi.sal_systab = config_tables[i].table;
 515                         printk(" SALsystab=0x%lx", config_tables[i].table);
 516                 } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
 517                         efi.hcdp = config_tables[i].table;
 518                         printk(" HCDP=0x%lx", config_tables[i].table);
 519                 }
 520         }
 521         printk("\n");
 522
 523         runtime = __va(efi.systab->runtime);
 524         efi.get_time = phys_get_time;
 525         efi.set_time = phys_set_time;
 526         efi.get_wakeup_time = phys_get_wakeup_time;
 527         efi.set_wakeup_time = phys_set_wakeup_time;
 528         efi.get_variable = phys_get_variable;
 529         efi.get_next_variable = phys_get_next_variable;
 530         efi.set_variable = phys_set_variable;
 531         efi.get_next_high_mono_count = phys_get_next_high_mono_count;
 532         efi.reset_system = phys_reset_system;
 533
 534         efi_map_start = __va(ia64_boot_param->efi_memmap);
 535         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
 536         efi_desc_size = ia64_boot_param->efi_memdesc_size;
 537
 538 #if EFI_DEBUG
 539         /* print EFI memory map: */
 540         {
 541                 efi_memory_desc_t *md;
 542                 void *p;
 543
 544                 for (i = 0, p = efi_map_start; p < efi_map_end;
 545                      ++i, p += efi_desc_size)
 546                 {
 547                         md = p;
 548                         printk("mem%02u: type=%u, attr=0x%lx, "
 549                                "range=[0x%016lx-0x%016lx) (%luMB)\n",
 550                                i, md->type, md->attribute, md->phys_addr,
 551                                md->phys_addr + efi_md_size(md),
 552                                md->num_pages >> (20 - EFI_PAGE_SHIFT));
 553                 }
 554         }
 555 #endif
 556
 557         efi_map_pal_code();
 558         efi_enter_virtual_mode();
 559 }
 560
 561 void
 562 efi_enter_virtual_mode (void)
 563 {
 564         void *efi_map_start, *efi_map_end, *p;
 565         efi_memory_desc_t *md;
 566         efi_status_t status;
 567         u64 efi_desc_size;
 568
 569         efi_map_start = __va(ia64_boot_param->efi_memmap);
 570         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
 571         efi_desc_size = ia64_boot_param->efi_memdesc_size;
 572
 573         for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
 574                 md = p;
 575                 if (md->attribute & EFI_MEMORY_RUNTIME) {
 576                         /*
 577                          * Some descriptors have multiple bits set, so the
 578                          * order of the tests is relevant.
 579                          */
 580                         if (md->attribute & EFI_MEMORY_WB) {
 581                                 md->virt_addr = (u64) __va(md->phys_addr);
 582                         } else if (md->attribute & EFI_MEMORY_UC) {
 583                                 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
 584                         } else if (md->attribute & EFI_MEMORY_WC) {
 585 #if 0
 586                                 md->virt_addr = ia64_remap(md->phys_addr,
 587                                                            (_PAGE_A |
 588                                                             _PAGE_P |
 589                                                             _PAGE_D |
 590                                                             _PAGE_MA_WC |
 591                                                             _PAGE_PL_0 |
 592                                                             _PAGE_AR_RW));
 593 #else
 594                                 printk(KERN_INFO "EFI_MEMORY_WC mapping\n");
 595                                 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
 596 #endif
 597                         } else if (md->attribute & EFI_MEMORY_WT) {
 598 #if 0
 599                                 md->virt_addr = ia64_remap(md->phys_addr,
 600                                                            (_PAGE_A |
 601                                                             _PAGE_P |
 602                                                             _PAGE_D |
 603                                                             _PAGE_MA_WT |
 604                                                             _PAGE_PL_0 |
 605                                                             _PAGE_AR_RW));
 606 #else
 607                                 printk(KERN_INFO "EFI_MEMORY_WT mapping\n");
 608                                 md->virt_addr = (u64) ioremap(md->phys_addr, 0);
 609 #endif
 610                         }
 611                 }
 612         }
 613
 614         status = efi_call_phys(__va(runtime->set_virtual_address_map),
 615                                ia64_boot_param->efi_memmap_size,
 616                                efi_desc_size,
 617                                ia64_boot_param->efi_memdesc_version,
 618                                ia64_boot_param->efi_memmap);
 619         if (status != EFI_SUCCESS) {
 620                 printk(KERN_WARNING "warning: unable to switch EFI into "
 621                        "virtual mode (status=%lu)\n", status);
 622                 return;
 623         }
 624
 625         /*
 626          * Now that EFI is in virtual mode, we call the EFI functions more
 627          * efficiently:
 628          */
 629         efi.get_time = virt_get_time;
 630         efi.set_time = virt_set_time;
 631         efi.get_wakeup_time = virt_get_wakeup_time;
 632         efi.set_wakeup_time = virt_set_wakeup_time;
 633         efi.get_variable = virt_get_variable;
 634         efi.get_next_variable = virt_get_next_variable;
 635         efi.set_variable = virt_set_variable;
 636         efi.get_next_high_mono_count = virt_get_next_high_mono_count;
 637         efi.reset_system = virt_reset_system;
 638 }
 639
 640 /*
 641  * Walk the EFI memory map looking for the I/O port range.  There can only be
 642  * one entry of this type, other I/O port ranges should be described via ACPI.
 643  */
 644 u64
 645 efi_get_iobase (void)
 646 {
 647         void *efi_map_start, *efi_map_end, *p;
 648         efi_memory_desc_t *md;
 649         u64 efi_desc_size;
 650
 651         efi_map_start = __va(ia64_boot_param->efi_memmap);
 652         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
 653         efi_desc_size = ia64_boot_param->efi_memdesc_size;
 654
 655         for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
 656                 md = p;
 657                 if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) {
 658                         if (md->attribute & EFI_MEMORY_UC)
 659                                 return md->phys_addr;
 660                 }
 661         }
 662         return 0;
 663 }
 664
 665 static struct kern_memdesc *
 666 kern_memory_descriptor (unsigned long phys_addr)
 667 {
 668         struct kern_memdesc *md;
 669
 670         for (md = kern_memmap; md->start != ~0UL; md++) {
 671                 if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT))
 672                          return md;
 673         }
 674         return NULL;
 675 }
 676
 677 static efi_memory_desc_t *
 678 efi_memory_descriptor (unsigned long phys_addr)
 679 {
 680         void *efi_map_start, *efi_map_end, *p;
 681         efi_memory_desc_t *md;
 682         u64 efi_desc_size;
 683
 684         efi_map_start = __va(ia64_boot_param->efi_memmap);
 685         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
 686         efi_desc_size = ia64_boot_param->efi_memdesc_size;
 687
 688         for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
 689                 md = p;
 690
 691                 if (phys_addr - md->phys_addr < efi_md_size(md))
 692                          return md;
 693         }
 694         return NULL;
 695 }
 696
 697 static int
 698 efi_memmap_intersects (unsigned long phys_addr, unsigned long size)
 699 {
 700         void *efi_map_start, *efi_map_end, *p;
 701         efi_memory_desc_t *md;
 702         u64 efi_desc_size;
 703         unsigned long end;
 704
 705         efi_map_start = __va(ia64_boot_param->efi_memmap);
 706         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
 707         efi_desc_size = ia64_boot_param->efi_memdesc_size;
 708
 709         end = phys_addr + size;
 710
 711         for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
 712                 md = p;
 713                 if (md->phys_addr < end && efi_md_end(md) > phys_addr)
 714                         return 1;
 715         }
 716         return 0;
 717 }
 718
 719 u32
 720 efi_mem_type (unsigned long phys_addr)
 721 {
 722         efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
 723
 724         if (md)
 725                 return md->type;
 726         return 0;
 727 }
 728
 729 u64
 730 efi_mem_attributes (unsigned long phys_addr)
 731 {
 732         efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
 733
 734         if (md)
 735                 return md->attribute;
 736         return 0;
 737 }
 738 EXPORT_SYMBOL(efi_mem_attributes);
 739
 740 u64
 741 efi_mem_attribute (unsigned long phys_addr, unsigned long size)
 742 {
 743         unsigned long end = phys_addr + size;
 744         efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
 745         u64 attr;
 746
 747         if (!md)
 748                 return 0;
 749
 750         /*
 751          * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells
 752          * the kernel that firmware needs this region mapped.
 753          */
 754         attr = md->attribute & ~EFI_MEMORY_RUNTIME;
 755         do {
 756                 unsigned long md_end = efi_md_end(md);
 757
 758                 if (end <= md_end)
 759                         return attr;
 760
 761                 md = efi_memory_descriptor(md_end);
 762                 if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr)
 763                         return 0;
 764         } while (md);
 765         return 0;       /* never reached */
 766 }
 767
 768 u64
 769 kern_mem_attribute (unsigned long phys_addr, unsigned long size)
 770 {
 771         unsigned long end = phys_addr + size;
 772         struct kern_memdesc *md;
 773         u64 attr;
 774
 775         /*
 776          * This is a hack for ioremap calls before we set up kern_memmap.
 777          * Maybe we should do efi_memmap_init() earlier instead.
 778          */
 779         if (!kern_memmap) {
 780                 attr = efi_mem_attribute(phys_addr, size);
 781                 if (attr & EFI_MEMORY_WB)
 782                         return EFI_MEMORY_WB;
 783                 return 0;
 784         }
 785
 786         md = kern_memory_descriptor(phys_addr);
 787         if (!md)
 788                 return 0;
 789
 790         attr = md->attribute;
 791         do {
 792                 unsigned long md_end = kmd_end(md);
 793
 794                 if (end <= md_end)
 795                         return attr;
 796
 797                 md = kern_memory_descriptor(md_end);
 798                 if (!md || md->attribute != attr)
 799                         return 0;
 800         } while (md);
 801         return 0;       /* never reached */
 802 }
 803 EXPORT_SYMBOL(kern_mem_attribute);
 804
 805 int
 806 valid_phys_addr_range (unsigned long phys_addr, unsigned long size)
 807 {
 808         u64 attr;
 809
 810         /*
 811          * /dev/mem reads and writes use copy_to_user(), which implicitly
 812          * uses a granule-sized kernel identity mapping.  It's really
 813          * only safe to do this for regions in kern_memmap.  For more
 814          * details, see Documentation/ia64/aliasing.txt.
 815          */
 816         attr = kern_mem_attribute(phys_addr, size);
 817         if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC)
 818                 return 1;
 819         return 0;
 820 }
 821
 822 int
 823 valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size)
 824 {
 825         unsigned long phys_addr = pfn << PAGE_SHIFT;
 826         u64 attr;
 827
 828         attr = efi_mem_attribute(phys_addr, size);
 829
 830         /*
 831          * /dev/mem mmap uses normal user pages, so we don't need the entire
 832          * granule, but the entire region we're mapping must support the same
 833          * attribute.
 834          */
 835         if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC)
 836                 return 1;
 837
 838         /*
 839          * Intel firmware doesn't tell us about all the MMIO regions, so
 840          * in general we have to allow mmap requests.  But if EFI *does*
 841          * tell us about anything inside this region, we should deny it.
 842          * The user can always map a smaller region to avoid the overlap.
 843          */
 844         if (efi_memmap_intersects(phys_addr, size))
 845                 return 0;
 846
 847         return 1;
 848 }
 849
 850 pgprot_t
 851 phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size,
 852                      pgprot_t vma_prot)
 853 {
 854         unsigned long phys_addr = pfn << PAGE_SHIFT;
 855         u64 attr;
 856
 857         /*
 858          * For /dev/mem mmap, we use user mappings, but if the region is
 859          * in kern_memmap (and hence may be covered by a kernel mapping),
 860          * we must use the same attribute as the kernel mapping.
 861          */
 862         attr = kern_mem_attribute(phys_addr, size);
 863         if (attr & EFI_MEMORY_WB)
 864                 return pgprot_cacheable(vma_prot);
 865         else if (attr & EFI_MEMORY_UC)
 866                 return pgprot_noncached(vma_prot);
 867
 868         /*
 869          * Some chipsets don't support UC access to memory.  If
 870          * WB is supported, we prefer that.
 871          */
 872         if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB)
 873                 return pgprot_cacheable(vma_prot);
 874
 875         return pgprot_noncached(vma_prot);
 876 }
 877
 878 int __init
 879 efi_uart_console_only(void)
 880 {
 881         efi_status_t status;
 882         char *s, name[] = "ConOut";
 883         efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID;
 884         efi_char16_t *utf16, name_utf16[32];
 885         unsigned char data[1024];
 886         unsigned long size = sizeof(data);
 887         struct efi_generic_dev_path *hdr, *end_addr;
 888         int uart = 0;
 889
 890         /* Convert to UTF-16 */
 891         utf16 = name_utf16;
 892         s = name;
 893         while (*s)
 894                 *utf16++ = *s++ & 0x7f;
 895         *utf16 = 0;
 896
 897         status = efi.get_variable(name_utf16, &guid, NULL, &size, data);
 898         if (status != EFI_SUCCESS) {
 899                 printk(KERN_ERR "No EFI %s variable?\n", name);
 900                 return 0;
 901         }
 902
 903         hdr = (struct efi_generic_dev_path *) data;
 904         end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size);
 905         while (hdr < end_addr) {
 906                 if (hdr->type == EFI_DEV_MSG &&
 907                     hdr->sub_type == EFI_DEV_MSG_UART)
 908                         uart = 1;
 909                 else if (hdr->type == EFI_DEV_END_PATH ||
 910                           hdr->type == EFI_DEV_END_PATH2) {
 911                         if (!uart)
 912                                 return 0;
 913                         if (hdr->sub_type == EFI_DEV_END_ENTIRE)
 914                                 return 1;
 915                         uart = 0;
 916                 }
 917                 hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length);
 918         }
 919         printk(KERN_ERR "Malformed %s value\n", name);
 920         return 0;
 921 }
 922
 923 /*
 924  * Look for the first granule aligned memory descriptor memory
 925  * that is big enough to hold EFI memory map. Make sure this
 926  * descriptor is atleast granule sized so it does not get trimmed
 927  */
 928 struct kern_memdesc *
 929 find_memmap_space (void)
 930 {
 931         u64     contig_low=0, contig_high=0;
 932         u64     as = 0, ae;
 933         void *efi_map_start, *efi_map_end, *p, *q;
 934         efi_memory_desc_t *md, *pmd = NULL, *check_md;
 935         u64     space_needed, efi_desc_size;
 936         unsigned long total_mem = 0;
 937
 938         efi_map_start = __va(ia64_boot_param->efi_memmap);
 939         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
 940         efi_desc_size = ia64_boot_param->efi_memdesc_size;
 941
 942         /*
 943          * Worst case: we need 3 kernel descriptors for each efi descriptor
 944          * (if every entry has a WB part in the middle, and UC head and tail),
 945          * plus one for the end marker.
 946          */
 947         space_needed = sizeof(kern_memdesc_t) *
 948                 (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1);
 949
 950         for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
 951                 md = p;
 952                 if (!efi_wb(md)) {
 953                         continue;
 954                 }
 955                 if (pmd == NULL || !efi_wb(pmd) ||
 956                     efi_md_end(pmd) != md->phys_addr) {
 957                         contig_low = GRANULEROUNDUP(md->phys_addr);
 958                         contig_high = efi_md_end(md);
 959                         for (q = p + efi_desc_size; q < efi_map_end;
 960                              q += efi_desc_size) {
 961                                 check_md = q;
 962                                 if (!efi_wb(check_md))
 963                                         break;
 964                                 if (contig_high != check_md->phys_addr)
 965                                         break;
 966                                 contig_high = efi_md_end(check_md);
 967                         }
 968                         contig_high = GRANULEROUNDDOWN(contig_high);
 969                 }
 970                 if (!is_memory_available(md) || md->type == EFI_LOADER_DATA)
 971                         continue;
 972
 973                 /* Round ends inward to granule boundaries */
 974                 as = max(contig_low, md->phys_addr);
 975                 ae = min(contig_high, efi_md_end(md));
 976
 977                 /* keep within max_addr= and min_addr= command line arg */
 978                 as = max(as, min_addr);
 979                 ae = min(ae, max_addr);
 980                 if (ae <= as)
 981                         continue;
 982
 983                 /* avoid going over mem= command line arg */
 984                 if (total_mem + (ae - as) > mem_limit)
 985                         ae -= total_mem + (ae - as) - mem_limit;
 986
 987                 if (ae <= as)
 988                         continue;
 989
 990                 if (ae - as > space_needed)
 991                         break;
 992         }
 993         if (p >= efi_map_end)
 994                 panic("Can't allocate space for kernel memory descriptors");
 995
 996         return __va(as);
 997 }
 998
 999 /*
1000  * Walk the EFI memory map and gather all memory available for kernel
1001  * to use.  We can allocate partial granules only if the unavailable
1002  * parts exist, and are WB.
1003  */
1004 unsigned long
1005 efi_memmap_init(unsigned long *s, unsigned long *e)
1006 {
1007         struct kern_memdesc *k, *prev = NULL;
1008         u64     contig_low=0, contig_high=0;
1009         u64     as, ae, lim;
1010         void *efi_map_start, *efi_map_end, *p, *q;
1011         efi_memory_desc_t *md, *pmd = NULL, *check_md;
1012         u64     efi_desc_size;
1013         unsigned long total_mem = 0;
1014
1015         k = kern_memmap = find_memmap_space();
1016
1017         efi_map_start = __va(ia64_boot_param->efi_memmap);
1018         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
1019         efi_desc_size = ia64_boot_param->efi_memdesc_size;
1020
1021         for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
1022                 md = p;
1023                 if (!efi_wb(md)) {
1024                         if (efi_uc(md) &&
1025                             (md->type == EFI_CONVENTIONAL_MEMORY ||
1026                              md->type == EFI_BOOT_SERVICES_DATA)) {
1027                                 k->attribute = EFI_MEMORY_UC;
1028                                 k->start = md->phys_addr;
1029                                 k->num_pages = md->num_pages;
1030                                 k++;
1031                         }
1032                         continue;
1033                 }
1034                 if (pmd == NULL || !efi_wb(pmd) ||
1035                     efi_md_end(pmd) != md->phys_addr) {
1036                         contig_low = GRANULEROUNDUP(md->phys_addr);
1037                         contig_high = efi_md_end(md);
1038                         for (q = p + efi_desc_size; q < efi_map_end;
1039                              q += efi_desc_size) {
1040                                 check_md = q;
1041                                 if (!efi_wb(check_md))
1042                                         break;
1043                                 if (contig_high != check_md->phys_addr)
1044                                         break;
1045                                 contig_high = efi_md_end(check_md);
1046                         }
1047                         contig_high = GRANULEROUNDDOWN(contig_high);
1048                 }
1049                 if (!is_memory_available(md))
1050                         continue;
1051
1052 #ifdef CONFIG_CRASH_DUMP
1053                 /* saved_max_pfn should ignore max_addr= command line arg */
1054                 if (saved_max_pfn < (efi_md_end(md) >> PAGE_SHIFT))
1055                         saved_max_pfn = (efi_md_end(md) >> PAGE_SHIFT);
1056 #endif
1057                 /*
1058                  * Round ends inward to granule boundaries
1059                  * Give trimmings to uncached allocator
1060                  */
1061                 if (md->phys_addr < contig_low) {
1062                         lim = min(efi_md_end(md), contig_low);
1063                         if (efi_uc(md)) {
1064                                 if (k > kern_memmap &&
1065                                     (k-1)->attribute == EFI_MEMORY_UC &&
1066                                     kmd_end(k-1) == md->phys_addr) {
1067                                         (k-1)->num_pages +=
1068                                                 (lim - md->phys_addr)
1069                                                 >> EFI_PAGE_SHIFT;
1070                                 } else {
1071                                         k->attribute = EFI_MEMORY_UC;
1072                                         k->start = md->phys_addr;
1073                                         k->num_pages = (lim - md->phys_addr)
1074                                                 >> EFI_PAGE_SHIFT;
1075                                         k++;
1076                                 }
1077                         }
1078                         as = contig_low;
1079                 } else
1080                         as = md->phys_addr;
1081
1082                 if (efi_md_end(md) > contig_high) {
1083                         lim = max(md->phys_addr, contig_high);
1084                         if (efi_uc(md)) {
1085                                 if (lim == md->phys_addr && k > kern_memmap &&
1086                                     (k-1)->attribute == EFI_MEMORY_UC &&
1087                                     kmd_end(k-1) == md->phys_addr) {
1088                                         (k-1)->num_pages += md->num_pages;
1089                                 } else {
1090                                         k->attribute = EFI_MEMORY_UC;
1091                                         k->start = lim;
1092                                         k->num_pages = (efi_md_end(md) - lim)
1093                                                 >> EFI_PAGE_SHIFT;
1094                                         k++;
1095                                 }
1096                         }
1097                         ae = contig_high;
1098                 } else
1099                         ae = efi_md_end(md);
1100
1101                 /* keep within max_addr= and min_addr= command line arg */
1102                 as = max(as, min_addr);
1103                 ae = min(ae, max_addr);
1104                 if (ae <= as)
1105                         continue;
1106
1107                 /* avoid going over mem= command line arg */
1108                 if (total_mem + (ae - as) > mem_limit)
1109                         ae -= total_mem + (ae - as) - mem_limit;
1110
1111                 if (ae <= as)
1112                         continue;
1113                 if (prev && kmd_end(prev) == md->phys_addr) {
1114                         prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT;
1115                         total_mem += ae - as;
1116                         continue;
1117                 }
1118                 k->attribute = EFI_MEMORY_WB;
1119                 k->start = as;
1120                 k->num_pages = (ae - as) >> EFI_PAGE_SHIFT;
1121                 total_mem += ae - as;
1122                 prev = k++;
1123         }
1124         k->start = ~0L; /* end-marker */
1125
1126         /* reserve the memory we are using for kern_memmap */
1127         *s = (u64)kern_memmap;
1128         *e = (u64)++k;
1129
1130         return total_mem;
1131 }
1132
1133 void
1134 efi_initialize_iomem_resources(struct resource *code_resource,
1135                                struct resource *data_resource,
1136                                struct resource *bss_resource)
1137 {
1138         struct resource *res;
1139         void *efi_map_start, *efi_map_end, *p;
1140         efi_memory_desc_t *md;
1141         u64 efi_desc_size;
1142         char *name;
1143         unsigned long flags;
1144
1145         efi_map_start = __va(ia64_boot_param->efi_memmap);
1146         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
1147         efi_desc_size = ia64_boot_param->efi_memdesc_size;
1148
1149         res = NULL;
1150
1151         for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
1152                 md = p;
1153
1154                 if (md->num_pages == 0) /* should not happen */
1155                         continue;
1156
1157                 flags = IORESOURCE_MEM | IORESOURCE_BUSY;
1158                 switch (md->type) {
1159
1160                         case EFI_MEMORY_MAPPED_IO:
1161                         case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
1162                                 continue;
1163
1164                         case EFI_LOADER_CODE:
1165                         case EFI_LOADER_DATA:
1166                         case EFI_BOOT_SERVICES_DATA:
1167                         case EFI_BOOT_SERVICES_CODE:
1168                         case EFI_CONVENTIONAL_MEMORY:
1169                                 if (md->attribute & EFI_MEMORY_WP) {
1170                                         name = "System ROM";
1171                                         flags |= IORESOURCE_READONLY;
1172                                 } else {
1173                                         name = "System RAM";
1174                                 }
1175                                 break;
1176
1177                         case EFI_ACPI_MEMORY_NVS:
1178                                 name = "ACPI Non-volatile Storage";
1179                                 break;
1180
1181                         case EFI_UNUSABLE_MEMORY:
1182                                 name = "reserved";
1183                                 flags |= IORESOURCE_DISABLED;
1184                                 break;
1185
1186                         case EFI_RESERVED_TYPE:
1187                         case EFI_RUNTIME_SERVICES_CODE:
1188                         case EFI_RUNTIME_SERVICES_DATA:
1189                         case EFI_ACPI_RECLAIM_MEMORY:
1190                         default:
1191                                 name = "reserved";
1192                                 break;
1193                 }
1194
1195                 if ((res = kzalloc(sizeof(struct resource),
1196                                    GFP_KERNEL)) == NULL) {
1197                         printk(KERN_ERR
1198                                "failed to allocate resource for iomem\n");
1199                         return;
1200                 }
1201
1202                 res->name = name;
1203                 res->start = md->phys_addr;
1204                 res->end = md->phys_addr + efi_md_size(md) - 1;
1205                 res->flags = flags;
1206
1207                 if (insert_resource(&iomem_resource, res) < 0)
1208                         kfree(res);
1209                 else {
1210                         /*
1211                          * We don't know which region contains
1212                          * kernel data so we try it repeatedly and
1213                          * let the resource manager test it.
1214                          */
1215                         insert_resource(res, code_resource);
1216                         insert_resource(res, data_resource);
1217                         insert_resource(res, bss_resource);
1218 #ifdef CONFIG_KEXEC
1219                         insert_resource(res, &efi_memmap_res);
1220                         insert_resource(res, &boot_param_res);
1221                         if (crashk_res.end > crashk_res.start)
1222                                 insert_resource(res, &crashk_res);
1223 #endif
1224                 }
1225         }
1226 }
1227
1228 #ifdef CONFIG_KEXEC
1229 /* find a block of memory aligned to 64M exclude reserved regions
1230    rsvd_regions are sorted
1231  */
1232 unsigned long __init
1233 kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n)
1234 {
1235         int i;
1236         u64 start, end;
1237         u64 alignment = 1UL << _PAGE_SIZE_64M;
1238         void *efi_map_start, *efi_map_end, *p;
1239         efi_memory_desc_t *md;
1240         u64 efi_desc_size;
1241
1242         efi_map_start = __va(ia64_boot_param->efi_memmap);
1243         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
1244         efi_desc_size = ia64_boot_param->efi_memdesc_size;
1245
1246         for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
1247                 md = p;
1248                 if (!efi_wb(md))
1249                         continue;
1250                 start = ALIGN(md->phys_addr, alignment);
1251                 end = efi_md_end(md);
1252                 for (i = 0; i < n; i++) {
1253                         if (__pa(r[i].start) >= start && __pa(r[i].end) < end) {
1254                                 if (__pa(r[i].start) > start + size)
1255                                         return start;
1256                                 start = ALIGN(__pa(r[i].end), alignment);
1257                                 if (i < n-1 &&
1258                                     __pa(r[i+1].start) < start + size)
1259                                         continue;
1260                                 else
1261                                         break;
1262                         }
1263                 }
1264                 if (end > start + size)
1265                         return start;
1266         }
1267
1268         printk(KERN_WARNING
1269                "Cannot reserve 0x%lx byte of memory for crashdump\n", size);
1270         return ~0UL;
1271 }
1272 #endif
1273
1274 #ifdef CONFIG_PROC_VMCORE
1275 /* locate the size find a the descriptor at a certain address */
1276 unsigned long __init
1277 vmcore_find_descriptor_size (unsigned long address)
1278 {
1279         void *efi_map_start, *efi_map_end, *p;
1280         efi_memory_desc_t *md;
1281         u64 efi_desc_size;
1282         unsigned long ret = 0;
1283
1284         efi_map_start = __va(ia64_boot_param->efi_memmap);
1285         efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
1286         efi_desc_size = ia64_boot_param->efi_memdesc_size;
1287
1288         for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
1289                 md = p;
1290                 if (efi_wb(md) && md->type == EFI_LOADER_DATA
1291                     && md->phys_addr == address) {
1292                         ret = efi_md_size(md);
1293                         break;
1294                 }
1295         }
1296
1297         if (ret == 0)
1298                 printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n");
1299
1300         return ret;
1301 }
1302 #endif