Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Extensible Firmware Interface |
| 3 | * |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 4 | * Based on Extensible Firmware Interface Specification version 0.9 |
| 5 | * April 30, 1999 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 12 | * (c) Copyright 2006 Hewlett-Packard Development Company, L.P. |
| 13 | * Bjorn Helgaas <bjorn.helgaas@hp.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
Horms | f4a5709 | 2007-03-06 02:34:21 -0800 | [diff] [blame] | 25 | #include <linux/bootmem.h> |
Olaf Hering | 93a7205 | 2011-03-23 16:43:29 -0700 | [diff] [blame] | 26 | #include <linux/crash_dump.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/kernel.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/types.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/time.h> |
| 32 | #include <linux/efi.h> |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 33 | #include <linux/kexec.h> |
Mel Gorman | ed7ed36 | 2007-07-17 04:03:14 -0700 | [diff] [blame] | 34 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | #include <asm/io.h> |
| 37 | #include <asm/kregs.h> |
| 38 | #include <asm/meminit.h> |
| 39 | #include <asm/pgtable.h> |
| 40 | #include <asm/processor.h> |
| 41 | #include <asm/mca.h> |
David Howells | c140d87 | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 42 | #include <asm/setup.h> |
Fenghua Yu | 2046b94 | 2008-04-04 11:05:59 -0700 | [diff] [blame] | 43 | #include <asm/tlbflush.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | #define EFI_DEBUG 0 |
| 46 | |
Leif Lindholm | 272686b | 2013-09-05 11:34:54 +0100 | [diff] [blame] | 47 | static __initdata unsigned long palo_phys; |
| 48 | |
| 49 | static __initdata efi_config_table_type_t arch_tables[] = { |
| 50 | {PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID, "PALO", &palo_phys}, |
| 51 | {NULL_GUID, NULL, 0}, |
| 52 | }; |
| 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | extern efi_status_t efi_call_phys (void *, ...); |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | static efi_runtime_services_t *runtime; |
Matthew Wilcox | e088a4a | 2009-05-22 13:49:49 -0700 | [diff] [blame] | 57 | static u64 mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | #define efi_call_virt(f, args...) (*(f))(args) |
| 60 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 61 | #define STUB_GET_TIME(prefix, adjust_arg) \ |
| 62 | static efi_status_t \ |
| 63 | prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \ |
| 64 | { \ |
| 65 | struct ia64_fpreg fr[6]; \ |
| 66 | efi_time_cap_t *atc = NULL; \ |
| 67 | efi_status_t ret; \ |
| 68 | \ |
| 69 | if (tc) \ |
| 70 | atc = adjust_arg(tc); \ |
| 71 | ia64_save_scratch_fpregs(fr); \ |
| 72 | ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), \ |
| 73 | adjust_arg(tm), atc); \ |
| 74 | ia64_load_scratch_fpregs(fr); \ |
| 75 | return ret; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | } |
| 77 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 78 | #define STUB_SET_TIME(prefix, adjust_arg) \ |
| 79 | static efi_status_t \ |
| 80 | prefix##_set_time (efi_time_t *tm) \ |
| 81 | { \ |
| 82 | struct ia64_fpreg fr[6]; \ |
| 83 | efi_status_t ret; \ |
| 84 | \ |
| 85 | ia64_save_scratch_fpregs(fr); \ |
| 86 | ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), \ |
| 87 | adjust_arg(tm)); \ |
| 88 | ia64_load_scratch_fpregs(fr); \ |
| 89 | return ret; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 92 | #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \ |
| 93 | static efi_status_t \ |
| 94 | prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, \ |
| 95 | efi_time_t *tm) \ |
| 96 | { \ |
| 97 | struct ia64_fpreg fr[6]; \ |
| 98 | efi_status_t ret; \ |
| 99 | \ |
| 100 | ia64_save_scratch_fpregs(fr); \ |
| 101 | ret = efi_call_##prefix( \ |
| 102 | (efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \ |
| 103 | adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \ |
| 104 | ia64_load_scratch_fpregs(fr); \ |
| 105 | return ret; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 108 | #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \ |
| 109 | static efi_status_t \ |
| 110 | prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \ |
| 111 | { \ |
| 112 | struct ia64_fpreg fr[6]; \ |
| 113 | efi_time_t *atm = NULL; \ |
| 114 | efi_status_t ret; \ |
| 115 | \ |
| 116 | if (tm) \ |
| 117 | atm = adjust_arg(tm); \ |
| 118 | ia64_save_scratch_fpregs(fr); \ |
| 119 | ret = efi_call_##prefix( \ |
| 120 | (efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \ |
| 121 | enabled, atm); \ |
| 122 | ia64_load_scratch_fpregs(fr); \ |
| 123 | return ret; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
| 125 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 126 | #define STUB_GET_VARIABLE(prefix, adjust_arg) \ |
| 127 | static efi_status_t \ |
| 128 | prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \ |
| 129 | unsigned long *data_size, void *data) \ |
| 130 | { \ |
| 131 | struct ia64_fpreg fr[6]; \ |
| 132 | u32 *aattr = NULL; \ |
| 133 | efi_status_t ret; \ |
| 134 | \ |
| 135 | if (attr) \ |
| 136 | aattr = adjust_arg(attr); \ |
| 137 | ia64_save_scratch_fpregs(fr); \ |
| 138 | ret = efi_call_##prefix( \ |
| 139 | (efi_get_variable_t *) __va(runtime->get_variable), \ |
| 140 | adjust_arg(name), adjust_arg(vendor), aattr, \ |
| 141 | adjust_arg(data_size), adjust_arg(data)); \ |
| 142 | ia64_load_scratch_fpregs(fr); \ |
| 143 | return ret; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | } |
| 145 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 146 | #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \ |
| 147 | static efi_status_t \ |
| 148 | prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, \ |
| 149 | efi_guid_t *vendor) \ |
| 150 | { \ |
| 151 | struct ia64_fpreg fr[6]; \ |
| 152 | efi_status_t ret; \ |
| 153 | \ |
| 154 | ia64_save_scratch_fpregs(fr); \ |
| 155 | ret = efi_call_##prefix( \ |
| 156 | (efi_get_next_variable_t *) __va(runtime->get_next_variable), \ |
| 157 | adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \ |
| 158 | ia64_load_scratch_fpregs(fr); \ |
| 159 | return ret; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | } |
| 161 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 162 | #define STUB_SET_VARIABLE(prefix, adjust_arg) \ |
| 163 | static efi_status_t \ |
| 164 | prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, \ |
Matthew Garrett | 1eb9a4b | 2011-07-06 16:48:49 -0400 | [diff] [blame] | 165 | u32 attr, unsigned long data_size, \ |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 166 | void *data) \ |
| 167 | { \ |
| 168 | struct ia64_fpreg fr[6]; \ |
| 169 | efi_status_t ret; \ |
| 170 | \ |
| 171 | ia64_save_scratch_fpregs(fr); \ |
| 172 | ret = efi_call_##prefix( \ |
| 173 | (efi_set_variable_t *) __va(runtime->set_variable), \ |
| 174 | adjust_arg(name), adjust_arg(vendor), attr, data_size, \ |
| 175 | adjust_arg(data)); \ |
| 176 | ia64_load_scratch_fpregs(fr); \ |
| 177 | return ret; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 180 | #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \ |
| 181 | static efi_status_t \ |
| 182 | prefix##_get_next_high_mono_count (u32 *count) \ |
| 183 | { \ |
| 184 | struct ia64_fpreg fr[6]; \ |
| 185 | efi_status_t ret; \ |
| 186 | \ |
| 187 | ia64_save_scratch_fpregs(fr); \ |
| 188 | ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \ |
| 189 | __va(runtime->get_next_high_mono_count), \ |
| 190 | adjust_arg(count)); \ |
| 191 | ia64_load_scratch_fpregs(fr); \ |
| 192 | return ret; \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 195 | #define STUB_RESET_SYSTEM(prefix, adjust_arg) \ |
| 196 | static void \ |
| 197 | prefix##_reset_system (int reset_type, efi_status_t status, \ |
| 198 | unsigned long data_size, efi_char16_t *data) \ |
| 199 | { \ |
| 200 | struct ia64_fpreg fr[6]; \ |
| 201 | efi_char16_t *adata = NULL; \ |
| 202 | \ |
| 203 | if (data) \ |
| 204 | adata = adjust_arg(data); \ |
| 205 | \ |
| 206 | ia64_save_scratch_fpregs(fr); \ |
| 207 | efi_call_##prefix( \ |
| 208 | (efi_reset_system_t *) __va(runtime->reset_system), \ |
| 209 | reset_type, status, data_size, adata); \ |
| 210 | /* should not return, but just in case... */ \ |
| 211 | ia64_load_scratch_fpregs(fr); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | #define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg)) |
| 215 | |
| 216 | STUB_GET_TIME(phys, phys_ptr) |
| 217 | STUB_SET_TIME(phys, phys_ptr) |
| 218 | STUB_GET_WAKEUP_TIME(phys, phys_ptr) |
| 219 | STUB_SET_WAKEUP_TIME(phys, phys_ptr) |
| 220 | STUB_GET_VARIABLE(phys, phys_ptr) |
| 221 | STUB_GET_NEXT_VARIABLE(phys, phys_ptr) |
| 222 | STUB_SET_VARIABLE(phys, phys_ptr) |
| 223 | STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr) |
| 224 | STUB_RESET_SYSTEM(phys, phys_ptr) |
| 225 | |
| 226 | #define id(arg) arg |
| 227 | |
| 228 | STUB_GET_TIME(virt, id) |
| 229 | STUB_SET_TIME(virt, id) |
| 230 | STUB_GET_WAKEUP_TIME(virt, id) |
| 231 | STUB_SET_WAKEUP_TIME(virt, id) |
| 232 | STUB_GET_VARIABLE(virt, id) |
| 233 | STUB_GET_NEXT_VARIABLE(virt, id) |
| 234 | STUB_SET_VARIABLE(virt, id) |
| 235 | STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id) |
| 236 | STUB_RESET_SYSTEM(virt, id) |
| 237 | |
| 238 | void |
Arnd Bergmann | 70f4f93 | 2016-06-17 16:48:17 +0200 | [diff] [blame^] | 239 | efi_gettimeofday (struct timespec64 *ts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
| 241 | efi_time_t tm; |
| 242 | |
Li Zefan | 4b07ae9 | 2007-11-06 13:40:39 -0800 | [diff] [blame] | 243 | if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) { |
| 244 | memset(ts, 0, sizeof(*ts)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | return; |
Li Zefan | 4b07ae9 | 2007-11-06 13:40:39 -0800 | [diff] [blame] | 246 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
Arnd Bergmann | 70f4f93 | 2016-06-17 16:48:17 +0200 | [diff] [blame^] | 248 | ts->tv_sec = mktime64(tm.year, tm.month, tm.day, |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 249 | tm.hour, tm.minute, tm.second); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | ts->tv_nsec = tm.nanosecond; |
| 251 | } |
| 252 | |
| 253 | static int |
Christoph Lameter | 66888a6 | 2006-12-04 14:58:35 -0800 | [diff] [blame] | 254 | is_memory_available (efi_memory_desc_t *md) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | { |
| 256 | if (!(md->attribute & EFI_MEMORY_WB)) |
| 257 | return 0; |
| 258 | |
| 259 | switch (md->type) { |
| 260 | case EFI_LOADER_CODE: |
| 261 | case EFI_LOADER_DATA: |
| 262 | case EFI_BOOT_SERVICES_CODE: |
| 263 | case EFI_BOOT_SERVICES_DATA: |
| 264 | case EFI_CONVENTIONAL_MEMORY: |
| 265 | return 1; |
| 266 | } |
| 267 | return 0; |
| 268 | } |
| 269 | |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 270 | typedef struct kern_memdesc { |
| 271 | u64 attribute; |
| 272 | u64 start; |
| 273 | u64 num_pages; |
| 274 | } kern_memdesc_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 276 | static kern_memdesc_t *kern_memmap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 278 | #define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT) |
| 279 | |
| 280 | static inline u64 |
| 281 | kmd_end(kern_memdesc_t *kmd) |
| 282 | { |
| 283 | return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT)); |
| 284 | } |
| 285 | |
| 286 | static inline u64 |
| 287 | efi_md_end(efi_memory_desc_t *md) |
| 288 | { |
| 289 | return (md->phys_addr + efi_md_size(md)); |
| 290 | } |
| 291 | |
| 292 | static inline int |
| 293 | efi_wb(efi_memory_desc_t *md) |
| 294 | { |
| 295 | return (md->attribute & EFI_MEMORY_WB); |
| 296 | } |
| 297 | |
| 298 | static inline int |
| 299 | efi_uc(efi_memory_desc_t *md) |
| 300 | { |
| 301 | return (md->attribute & EFI_MEMORY_UC); |
| 302 | } |
| 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | static void |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 305 | walk (efi_freemem_callback_t callback, void *arg, u64 attr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | { |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 307 | kern_memdesc_t *k; |
| 308 | u64 start, end, voff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 310 | voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET; |
| 311 | for (k = kern_memmap; k->start != ~0UL; k++) { |
| 312 | if (k->attribute != attr) |
| 313 | continue; |
| 314 | start = PAGE_ALIGN(k->start); |
| 315 | end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK; |
| 316 | if (start < end) |
| 317 | if ((*callback)(start + voff, end + voff, arg) < 0) |
| 318 | return; |
| 319 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | /* |
Aron Griffis | 965e7c8 | 2008-01-08 22:29:37 -0500 | [diff] [blame] | 323 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 324 | * descriptor that has memory that is available for OS use. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | */ |
| 326 | void |
| 327 | efi_memmap_walk (efi_freemem_callback_t callback, void *arg) |
| 328 | { |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 329 | walk(callback, arg, EFI_MEMORY_WB); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | /* |
Aron Griffis | 965e7c8 | 2008-01-08 22:29:37 -0500 | [diff] [blame] | 333 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 334 | * descriptor that has memory that is available for uncached allocator. |
Jes Sorensen | f14f75b | 2005-06-21 17:15:02 -0700 | [diff] [blame] | 335 | */ |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 336 | void |
| 337 | efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg) |
Jes Sorensen | f14f75b | 2005-06-21 17:15:02 -0700 | [diff] [blame] | 338 | { |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 339 | walk(callback, arg, EFI_MEMORY_UC); |
Jes Sorensen | f14f75b | 2005-06-21 17:15:02 -0700 | [diff] [blame] | 340 | } |
| 341 | |
Jes Sorensen | f14f75b | 2005-06-21 17:15:02 -0700 | [diff] [blame] | 342 | /* |
Aron Griffis | 965e7c8 | 2008-01-08 22:29:37 -0500 | [diff] [blame] | 343 | * Look for the PAL_CODE region reported by EFI and map it using an |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor |
| 345 | * Abstraction Layer chapter 11 in ADAG |
| 346 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | void * |
| 348 | efi_get_pal_addr (void) |
| 349 | { |
| 350 | void *efi_map_start, *efi_map_end, *p; |
| 351 | efi_memory_desc_t *md; |
| 352 | u64 efi_desc_size; |
| 353 | int pal_code_count = 0; |
| 354 | u64 vaddr, mask; |
| 355 | |
| 356 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 357 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 358 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 359 | |
| 360 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
| 361 | md = p; |
| 362 | if (md->type != EFI_PAL_CODE) |
| 363 | continue; |
| 364 | |
| 365 | if (++pal_code_count > 1) { |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 366 | printk(KERN_ERR "Too many EFI Pal Code memory ranges, " |
Matthew Wilcox | e088a4a | 2009-05-22 13:49:49 -0700 | [diff] [blame] | 367 | "dropped @ %llx\n", md->phys_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | continue; |
| 369 | } |
| 370 | /* |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 371 | * The only ITLB entry in region 7 that is used is the one |
| 372 | * installed by __start(). That entry covers a 64MB range. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | */ |
| 374 | mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1); |
| 375 | vaddr = PAGE_OFFSET + md->phys_addr; |
| 376 | |
| 377 | /* |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 378 | * We must check that the PAL mapping won't overlap with the |
| 379 | * kernel mapping. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | * |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 381 | * PAL code is guaranteed to be aligned on a power of 2 between |
| 382 | * 4k and 256KB and that only one ITR is needed to map it. This |
| 383 | * implies that the PAL code is always aligned on its size, |
| 384 | * i.e., the closest matching page size supported by the TLB. |
| 385 | * Therefore PAL code is guaranteed never to cross a 64MB unless |
| 386 | * it is bigger than 64MB (very unlikely!). So for now the |
| 387 | * following test is enough to determine whether or not we need |
| 388 | * a dedicated ITR for the PAL code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | */ |
| 390 | if ((vaddr & mask) == (KERNEL_START & mask)) { |
Harvey Harrison | d4ed808 | 2008-03-04 15:15:00 -0800 | [diff] [blame] | 391 | printk(KERN_INFO "%s: no need to install ITR for PAL code\n", |
| 392 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | continue; |
| 394 | } |
| 395 | |
Li Zefan | 685c7f5 | 2007-11-21 14:58:26 -0800 | [diff] [blame] | 396 | if (efi_md_size(md) > IA64_GRANULE_SIZE) |
Aron Griffis | 965e7c8 | 2008-01-08 22:29:37 -0500 | [diff] [blame] | 397 | panic("Whoa! PAL code size bigger than a granule!"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
| 399 | #if EFI_DEBUG |
| 400 | mask = ~((1 << IA64_GRANULE_SHIFT) - 1); |
| 401 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 402 | printk(KERN_INFO "CPU %d: mapping PAL code " |
| 403 | "[0x%lx-0x%lx) into [0x%lx-0x%lx)\n", |
| 404 | smp_processor_id(), md->phys_addr, |
| 405 | md->phys_addr + efi_md_size(md), |
| 406 | vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | #endif |
| 408 | return __va(md->phys_addr); |
| 409 | } |
Horms | 9473252 | 2007-02-05 10:17:38 +0900 | [diff] [blame] | 410 | printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n", |
Harvey Harrison | d4ed808 | 2008-03-04 15:15:00 -0800 | [diff] [blame] | 411 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | return NULL; |
| 413 | } |
| 414 | |
Fenghua Yu | 2046b94 | 2008-04-04 11:05:59 -0700 | [diff] [blame] | 415 | |
| 416 | static u8 __init palo_checksum(u8 *buffer, u32 length) |
| 417 | { |
| 418 | u8 sum = 0; |
| 419 | u8 *end = buffer + length; |
| 420 | |
| 421 | while (buffer < end) |
| 422 | sum = (u8) (sum + *(buffer++)); |
| 423 | |
| 424 | return sum; |
| 425 | } |
| 426 | |
| 427 | /* |
| 428 | * Parse and handle PALO table which is published at: |
| 429 | * http://www.dig64.org/home/DIG64_PALO_R1_0.pdf |
| 430 | */ |
Leif Lindholm | 272686b | 2013-09-05 11:34:54 +0100 | [diff] [blame] | 431 | static void __init handle_palo(unsigned long phys_addr) |
Fenghua Yu | 2046b94 | 2008-04-04 11:05:59 -0700 | [diff] [blame] | 432 | { |
Leif Lindholm | 272686b | 2013-09-05 11:34:54 +0100 | [diff] [blame] | 433 | struct palo_table *palo = __va(phys_addr); |
Fenghua Yu | 2046b94 | 2008-04-04 11:05:59 -0700 | [diff] [blame] | 434 | u8 checksum; |
| 435 | |
| 436 | if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) { |
| 437 | printk(KERN_INFO "PALO signature incorrect.\n"); |
| 438 | return; |
| 439 | } |
| 440 | |
| 441 | checksum = palo_checksum((u8 *)palo, palo->length); |
| 442 | if (checksum) { |
| 443 | printk(KERN_INFO "PALO checksum incorrect.\n"); |
| 444 | return; |
| 445 | } |
| 446 | |
Fenghua Yu | a6c75b86 | 2008-03-14 13:57:08 -0700 | [diff] [blame] | 447 | setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO); |
Fenghua Yu | 2046b94 | 2008-04-04 11:05:59 -0700 | [diff] [blame] | 448 | } |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | void |
| 451 | efi_map_pal_code (void) |
| 452 | { |
| 453 | void *pal_vaddr = efi_get_pal_addr (); |
| 454 | u64 psr; |
| 455 | |
| 456 | if (!pal_vaddr) |
| 457 | return; |
| 458 | |
| 459 | /* |
| 460 | * Cannot write to CRx with PSR.ic=1 |
| 461 | */ |
| 462 | psr = ia64_clear_ic(); |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 463 | ia64_itr(0x1, IA64_TR_PALCODE, |
| 464 | GRANULEROUNDDOWN((unsigned long) pal_vaddr), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)), |
| 466 | IA64_GRANULE_SHIFT); |
| 467 | ia64_set_psr(psr); /* restore psr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | void __init |
| 471 | efi_init (void) |
| 472 | { |
| 473 | void *efi_map_start, *efi_map_end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | efi_char16_t *c16; |
| 475 | u64 efi_desc_size; |
Zou Nan hai | 9d78f43 | 2006-02-07 11:35:46 +0800 | [diff] [blame] | 476 | char *cp, vendor[100] = "unknown"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | int i; |
| 478 | |
Matt Fleming | 0920638 | 2014-01-15 13:49:51 +0000 | [diff] [blame] | 479 | set_bit(EFI_BOOT, &efi.flags); |
| 480 | set_bit(EFI_64BIT, &efi.flags); |
| 481 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 482 | /* |
Aron Griffis | 965e7c8 | 2008-01-08 22:29:37 -0500 | [diff] [blame] | 483 | * It's too early to be able to use the standard kernel command line |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 484 | * support... |
| 485 | */ |
Alon Bar-Lev | a8d91b8 | 2007-02-12 00:54:12 -0800 | [diff] [blame] | 486 | for (cp = boot_command_line; *cp; ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | if (memcmp(cp, "mem=", 4) == 0) { |
Zou Nan hai | 9d78f43 | 2006-02-07 11:35:46 +0800 | [diff] [blame] | 488 | mem_limit = memparse(cp + 4, &cp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | } else if (memcmp(cp, "max_addr=", 9) == 0) { |
Zou Nan hai | 9d78f43 | 2006-02-07 11:35:46 +0800 | [diff] [blame] | 490 | max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 491 | } else if (memcmp(cp, "min_addr=", 9) == 0) { |
| 492 | min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | } else { |
| 494 | while (*cp != ' ' && *cp) |
| 495 | ++cp; |
| 496 | while (*cp == ' ') |
| 497 | ++cp; |
| 498 | } |
| 499 | } |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 500 | if (min_addr != 0UL) |
Matthew Wilcox | e088a4a | 2009-05-22 13:49:49 -0700 | [diff] [blame] | 501 | printk(KERN_INFO "Ignoring memory below %lluMB\n", |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 502 | min_addr >> 20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (max_addr != ~0UL) |
Matthew Wilcox | e088a4a | 2009-05-22 13:49:49 -0700 | [diff] [blame] | 504 | printk(KERN_INFO "Ignoring memory above %lluMB\n", |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 505 | max_addr >> 20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
| 507 | efi.systab = __va(ia64_boot_param->efi_systab); |
| 508 | |
| 509 | /* |
| 510 | * Verify the EFI Table |
| 511 | */ |
| 512 | if (efi.systab == NULL) |
Aron Griffis | 965e7c8 | 2008-01-08 22:29:37 -0500 | [diff] [blame] | 513 | panic("Whoa! Can't find EFI system table.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) |
Aron Griffis | 965e7c8 | 2008-01-08 22:29:37 -0500 | [diff] [blame] | 515 | panic("Whoa! EFI system table signature incorrect\n"); |
Bjorn Helgaas | 873ec74 | 2007-05-08 00:29:57 -0700 | [diff] [blame] | 516 | if ((efi.systab->hdr.revision >> 16) == 0) |
| 517 | printk(KERN_WARNING "Warning: EFI system table version " |
| 518 | "%d.%02d, expected 1.00 or greater\n", |
| 519 | efi.systab->hdr.revision >> 16, |
| 520 | efi.systab->hdr.revision & 0xffff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | /* Show what we know for posterity */ |
| 523 | c16 = __va(efi.systab->fw_vendor); |
| 524 | if (c16) { |
Zou Nan hai | ecdd5da | 2006-02-07 11:25:55 +0800 | [diff] [blame] | 525 | for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | vendor[i] = *c16++; |
| 527 | vendor[i] = '\0'; |
| 528 | } |
| 529 | |
| 530 | printk(KERN_INFO "EFI v%u.%.02u by %s:", |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 531 | efi.systab->hdr.revision >> 16, |
| 532 | efi.systab->hdr.revision & 0xffff, vendor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
Fenghua Yu | 2046b94 | 2008-04-04 11:05:59 -0700 | [diff] [blame] | 534 | palo_phys = EFI_INVALID_TABLE_ADDR; |
| 535 | |
Leif Lindholm | 272686b | 2013-09-05 11:34:54 +0100 | [diff] [blame] | 536 | if (efi_config_init(arch_tables) != 0) |
| 537 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
Fenghua Yu | 2046b94 | 2008-04-04 11:05:59 -0700 | [diff] [blame] | 539 | if (palo_phys != EFI_INVALID_TABLE_ADDR) |
| 540 | handle_palo(palo_phys); |
| 541 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | runtime = __va(efi.systab->runtime); |
| 543 | efi.get_time = phys_get_time; |
| 544 | efi.set_time = phys_set_time; |
| 545 | efi.get_wakeup_time = phys_get_wakeup_time; |
| 546 | efi.set_wakeup_time = phys_set_wakeup_time; |
| 547 | efi.get_variable = phys_get_variable; |
| 548 | efi.get_next_variable = phys_get_next_variable; |
| 549 | efi.set_variable = phys_set_variable; |
| 550 | efi.get_next_high_mono_count = phys_get_next_high_mono_count; |
| 551 | efi.reset_system = phys_reset_system; |
| 552 | |
| 553 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 554 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 555 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 556 | |
| 557 | #if EFI_DEBUG |
| 558 | /* print EFI memory map: */ |
| 559 | { |
| 560 | efi_memory_desc_t *md; |
| 561 | void *p; |
| 562 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 563 | for (i = 0, p = efi_map_start; p < efi_map_end; |
| 564 | ++i, p += efi_desc_size) |
| 565 | { |
Simon Horman | 818c7e8 | 2008-02-26 15:24:04 +0900 | [diff] [blame] | 566 | const char *unit; |
| 567 | unsigned long size; |
Laszlo Ersek | 77b12bcf | 2014-09-03 13:32:22 +0200 | [diff] [blame] | 568 | char buf[64]; |
Simon Horman | 818c7e8 | 2008-02-26 15:24:04 +0900 | [diff] [blame] | 569 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | md = p; |
Simon Horman | 818c7e8 | 2008-02-26 15:24:04 +0900 | [diff] [blame] | 571 | size = md->num_pages << EFI_PAGE_SHIFT; |
| 572 | |
| 573 | if ((size >> 40) > 0) { |
| 574 | size >>= 40; |
| 575 | unit = "TB"; |
| 576 | } else if ((size >> 30) > 0) { |
| 577 | size >>= 30; |
| 578 | unit = "GB"; |
| 579 | } else if ((size >> 20) > 0) { |
| 580 | size >>= 20; |
| 581 | unit = "MB"; |
| 582 | } else { |
| 583 | size >>= 10; |
| 584 | unit = "KB"; |
| 585 | } |
| 586 | |
Laszlo Ersek | 77b12bcf | 2014-09-03 13:32:22 +0200 | [diff] [blame] | 587 | printk("mem%02d: %s " |
Simon Horman | 818c7e8 | 2008-02-26 15:24:04 +0900 | [diff] [blame] | 588 | "range=[0x%016lx-0x%016lx) (%4lu%s)\n", |
Laszlo Ersek | 77b12bcf | 2014-09-03 13:32:22 +0200 | [diff] [blame] | 589 | i, efi_md_typeattr_format(buf, sizeof(buf), md), |
| 590 | md->phys_addr, |
Simon Horman | 818c7e8 | 2008-02-26 15:24:04 +0900 | [diff] [blame] | 591 | md->phys_addr + efi_md_size(md), size, unit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | } |
| 593 | } |
| 594 | #endif |
| 595 | |
| 596 | efi_map_pal_code(); |
| 597 | efi_enter_virtual_mode(); |
| 598 | } |
| 599 | |
| 600 | void |
| 601 | efi_enter_virtual_mode (void) |
| 602 | { |
| 603 | void *efi_map_start, *efi_map_end, *p; |
| 604 | efi_memory_desc_t *md; |
| 605 | efi_status_t status; |
| 606 | u64 efi_desc_size; |
| 607 | |
| 608 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 609 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 610 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 611 | |
| 612 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
| 613 | md = p; |
| 614 | if (md->attribute & EFI_MEMORY_RUNTIME) { |
| 615 | /* |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 616 | * Some descriptors have multiple bits set, so the |
| 617 | * order of the tests is relevant. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | */ |
| 619 | if (md->attribute & EFI_MEMORY_WB) { |
| 620 | md->virt_addr = (u64) __va(md->phys_addr); |
| 621 | } else if (md->attribute & EFI_MEMORY_UC) { |
| 622 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); |
| 623 | } else if (md->attribute & EFI_MEMORY_WC) { |
| 624 | #if 0 |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 625 | md->virt_addr = ia64_remap(md->phys_addr, |
| 626 | (_PAGE_A | |
| 627 | _PAGE_P | |
| 628 | _PAGE_D | |
| 629 | _PAGE_MA_WC | |
| 630 | _PAGE_PL_0 | |
| 631 | _PAGE_AR_RW)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | #else |
| 633 | printk(KERN_INFO "EFI_MEMORY_WC mapping\n"); |
| 634 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); |
| 635 | #endif |
| 636 | } else if (md->attribute & EFI_MEMORY_WT) { |
| 637 | #if 0 |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 638 | md->virt_addr = ia64_remap(md->phys_addr, |
| 639 | (_PAGE_A | |
| 640 | _PAGE_P | |
| 641 | _PAGE_D | |
| 642 | _PAGE_MA_WT | |
| 643 | _PAGE_PL_0 | |
| 644 | _PAGE_AR_RW)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | #else |
| 646 | printk(KERN_INFO "EFI_MEMORY_WT mapping\n"); |
| 647 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); |
| 648 | #endif |
| 649 | } |
| 650 | } |
| 651 | } |
| 652 | |
| 653 | status = efi_call_phys(__va(runtime->set_virtual_address_map), |
| 654 | ia64_boot_param->efi_memmap_size, |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 655 | efi_desc_size, |
| 656 | ia64_boot_param->efi_memdesc_version, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | ia64_boot_param->efi_memmap); |
| 658 | if (status != EFI_SUCCESS) { |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 659 | printk(KERN_WARNING "warning: unable to switch EFI into " |
| 660 | "virtual mode (status=%lu)\n", status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | return; |
| 662 | } |
| 663 | |
Matt Fleming | 0920638 | 2014-01-15 13:49:51 +0000 | [diff] [blame] | 664 | set_bit(EFI_RUNTIME_SERVICES, &efi.flags); |
| 665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | /* |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 667 | * Now that EFI is in virtual mode, we call the EFI functions more |
| 668 | * efficiently: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | */ |
| 670 | efi.get_time = virt_get_time; |
| 671 | efi.set_time = virt_set_time; |
| 672 | efi.get_wakeup_time = virt_get_wakeup_time; |
| 673 | efi.set_wakeup_time = virt_set_wakeup_time; |
| 674 | efi.get_variable = virt_get_variable; |
| 675 | efi.get_next_variable = virt_get_next_variable; |
| 676 | efi.set_variable = virt_set_variable; |
| 677 | efi.get_next_high_mono_count = virt_get_next_high_mono_count; |
| 678 | efi.reset_system = virt_reset_system; |
| 679 | } |
| 680 | |
| 681 | /* |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 682 | * Walk the EFI memory map looking for the I/O port range. There can only be |
| 683 | * one entry of this type, other I/O port ranges should be described via ACPI. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | */ |
| 685 | u64 |
| 686 | efi_get_iobase (void) |
| 687 | { |
| 688 | void *efi_map_start, *efi_map_end, *p; |
| 689 | efi_memory_desc_t *md; |
| 690 | u64 efi_desc_size; |
| 691 | |
| 692 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 693 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 694 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 695 | |
| 696 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
| 697 | md = p; |
| 698 | if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) { |
| 699 | if (md->attribute & EFI_MEMORY_UC) |
| 700 | return md->phys_addr; |
| 701 | } |
| 702 | } |
| 703 | return 0; |
| 704 | } |
| 705 | |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 706 | static struct kern_memdesc * |
| 707 | kern_memory_descriptor (unsigned long phys_addr) |
| 708 | { |
| 709 | struct kern_memdesc *md; |
| 710 | |
| 711 | for (md = kern_memmap; md->start != ~0UL; md++) { |
| 712 | if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT)) |
| 713 | return md; |
| 714 | } |
Keith Owens | e037cda | 2006-07-17 15:41:59 +1000 | [diff] [blame] | 715 | return NULL; |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 716 | } |
| 717 | |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 718 | static efi_memory_desc_t * |
| 719 | efi_memory_descriptor (unsigned long phys_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | { |
| 721 | void *efi_map_start, *efi_map_end, *p; |
| 722 | efi_memory_desc_t *md; |
| 723 | u64 efi_desc_size; |
| 724 | |
| 725 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 726 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 727 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 728 | |
| 729 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
| 730 | md = p; |
| 731 | |
Li Zefan | 685c7f5 | 2007-11-21 14:58:26 -0800 | [diff] [blame] | 732 | if (phys_addr - md->phys_addr < efi_md_size(md)) |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 733 | return md; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | } |
Keith Owens | e037cda | 2006-07-17 15:41:59 +1000 | [diff] [blame] | 735 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | } |
| 737 | |
Bjorn Helgaas | 6d40fc5 | 2007-03-30 10:35:43 -0600 | [diff] [blame] | 738 | static int |
| 739 | efi_memmap_intersects (unsigned long phys_addr, unsigned long size) |
| 740 | { |
| 741 | void *efi_map_start, *efi_map_end, *p; |
| 742 | efi_memory_desc_t *md; |
| 743 | u64 efi_desc_size; |
| 744 | unsigned long end; |
| 745 | |
| 746 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 747 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 748 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 749 | |
| 750 | end = phys_addr + size; |
| 751 | |
| 752 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
| 753 | md = p; |
Bjorn Helgaas | 6d40fc5 | 2007-03-30 10:35:43 -0600 | [diff] [blame] | 754 | if (md->phys_addr < end && efi_md_end(md) > phys_addr) |
| 755 | return 1; |
| 756 | } |
| 757 | return 0; |
| 758 | } |
| 759 | |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 760 | u32 |
| 761 | efi_mem_type (unsigned long phys_addr) |
| 762 | { |
| 763 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
| 764 | |
| 765 | if (md) |
| 766 | return md->type; |
| 767 | return 0; |
| 768 | } |
| 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | u64 |
| 771 | efi_mem_attributes (unsigned long phys_addr) |
| 772 | { |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 773 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 775 | if (md) |
| 776 | return md->attribute; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | return 0; |
| 778 | } |
| 779 | EXPORT_SYMBOL(efi_mem_attributes); |
| 780 | |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 781 | u64 |
| 782 | efi_mem_attribute (unsigned long phys_addr, unsigned long size) |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 783 | { |
Bjorn Helgaas | 136939a | 2006-03-26 01:37:05 -0800 | [diff] [blame] | 784 | unsigned long end = phys_addr + size; |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 785 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 786 | u64 attr; |
| 787 | |
| 788 | if (!md) |
| 789 | return 0; |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 790 | |
Bjorn Helgaas | 136939a | 2006-03-26 01:37:05 -0800 | [diff] [blame] | 791 | /* |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 792 | * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells |
| 793 | * the kernel that firmware needs this region mapped. |
Bjorn Helgaas | 136939a | 2006-03-26 01:37:05 -0800 | [diff] [blame] | 794 | */ |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 795 | attr = md->attribute & ~EFI_MEMORY_RUNTIME; |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 796 | do { |
Bjorn Helgaas | 136939a | 2006-03-26 01:37:05 -0800 | [diff] [blame] | 797 | unsigned long md_end = efi_md_end(md); |
| 798 | |
| 799 | if (end <= md_end) |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 800 | return attr; |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 801 | |
| 802 | md = efi_memory_descriptor(md_end); |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 803 | if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr) |
Bjorn Helgaas | 136939a | 2006-03-26 01:37:05 -0800 | [diff] [blame] | 804 | return 0; |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 805 | } while (md); |
Aron Griffis | 410ab51 | 2008-01-08 22:29:38 -0500 | [diff] [blame] | 806 | return 0; /* never reached */ |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 807 | } |
| 808 | |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 809 | u64 |
| 810 | kern_mem_attribute (unsigned long phys_addr, unsigned long size) |
| 811 | { |
| 812 | unsigned long end = phys_addr + size; |
| 813 | struct kern_memdesc *md; |
| 814 | u64 attr; |
| 815 | |
| 816 | /* |
| 817 | * This is a hack for ioremap calls before we set up kern_memmap. |
| 818 | * Maybe we should do efi_memmap_init() earlier instead. |
| 819 | */ |
| 820 | if (!kern_memmap) { |
| 821 | attr = efi_mem_attribute(phys_addr, size); |
| 822 | if (attr & EFI_MEMORY_WB) |
| 823 | return EFI_MEMORY_WB; |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | md = kern_memory_descriptor(phys_addr); |
| 828 | if (!md) |
| 829 | return 0; |
| 830 | |
| 831 | attr = md->attribute; |
| 832 | do { |
| 833 | unsigned long md_end = kmd_end(md); |
| 834 | |
| 835 | if (end <= md_end) |
| 836 | return attr; |
| 837 | |
| 838 | md = kern_memory_descriptor(md_end); |
| 839 | if (!md || md->attribute != attr) |
| 840 | return 0; |
| 841 | } while (md); |
Aron Griffis | 410ab51 | 2008-01-08 22:29:38 -0500 | [diff] [blame] | 842 | return 0; /* never reached */ |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 843 | } |
| 844 | EXPORT_SYMBOL(kern_mem_attribute); |
| 845 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | int |
Cyril Chemparathy | 7e6735c | 2012-09-12 14:05:58 -0400 | [diff] [blame] | 847 | valid_phys_addr_range (phys_addr_t phys_addr, unsigned long size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | { |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 849 | u64 attr; |
| 850 | |
| 851 | /* |
| 852 | * /dev/mem reads and writes use copy_to_user(), which implicitly |
| 853 | * uses a granule-sized kernel identity mapping. It's really |
| 854 | * only safe to do this for regions in kern_memmap. For more |
| 855 | * details, see Documentation/ia64/aliasing.txt. |
| 856 | */ |
| 857 | attr = kern_mem_attribute(phys_addr, size); |
| 858 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) |
| 859 | return 1; |
| 860 | return 0; |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 861 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 863 | int |
Lennert Buytenhek | 06c67be | 2006-07-10 04:45:27 -0700 | [diff] [blame] | 864 | valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size) |
Bjorn Helgaas | 80851ef | 2006-01-08 01:04:13 -0800 | [diff] [blame] | 865 | { |
Bjorn Helgaas | 6d40fc5 | 2007-03-30 10:35:43 -0600 | [diff] [blame] | 866 | unsigned long phys_addr = pfn << PAGE_SHIFT; |
| 867 | u64 attr; |
| 868 | |
| 869 | attr = efi_mem_attribute(phys_addr, size); |
| 870 | |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 871 | /* |
Bjorn Helgaas | 6d40fc5 | 2007-03-30 10:35:43 -0600 | [diff] [blame] | 872 | * /dev/mem mmap uses normal user pages, so we don't need the entire |
| 873 | * granule, but the entire region we're mapping must support the same |
| 874 | * attribute. |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 875 | */ |
Bjorn Helgaas | 6d40fc5 | 2007-03-30 10:35:43 -0600 | [diff] [blame] | 876 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) |
| 877 | return 1; |
| 878 | |
| 879 | /* |
| 880 | * Intel firmware doesn't tell us about all the MMIO regions, so |
| 881 | * in general we have to allow mmap requests. But if EFI *does* |
| 882 | * tell us about anything inside this region, we should deny it. |
| 883 | * The user can always map a smaller region to avoid the overlap. |
| 884 | */ |
| 885 | if (efi_memmap_intersects(phys_addr, size)) |
| 886 | return 0; |
| 887 | |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 888 | return 1; |
| 889 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 891 | pgprot_t |
| 892 | phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, |
| 893 | pgprot_t vma_prot) |
| 894 | { |
| 895 | unsigned long phys_addr = pfn << PAGE_SHIFT; |
| 896 | u64 attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
Bjorn Helgaas | 32e62c6 | 2006-05-05 17:19:50 -0600 | [diff] [blame] | 898 | /* |
| 899 | * For /dev/mem mmap, we use user mappings, but if the region is |
| 900 | * in kern_memmap (and hence may be covered by a kernel mapping), |
| 901 | * we must use the same attribute as the kernel mapping. |
| 902 | */ |
| 903 | attr = kern_mem_attribute(phys_addr, size); |
| 904 | if (attr & EFI_MEMORY_WB) |
| 905 | return pgprot_cacheable(vma_prot); |
| 906 | else if (attr & EFI_MEMORY_UC) |
| 907 | return pgprot_noncached(vma_prot); |
| 908 | |
| 909 | /* |
| 910 | * Some chipsets don't support UC access to memory. If |
| 911 | * WB is supported, we prefer that. |
| 912 | */ |
| 913 | if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB) |
| 914 | return pgprot_cacheable(vma_prot); |
| 915 | |
| 916 | return pgprot_noncached(vma_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } |
| 918 | |
| 919 | int __init |
| 920 | efi_uart_console_only(void) |
| 921 | { |
| 922 | efi_status_t status; |
| 923 | char *s, name[] = "ConOut"; |
| 924 | efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID; |
| 925 | efi_char16_t *utf16, name_utf16[32]; |
| 926 | unsigned char data[1024]; |
| 927 | unsigned long size = sizeof(data); |
| 928 | struct efi_generic_dev_path *hdr, *end_addr; |
| 929 | int uart = 0; |
| 930 | |
| 931 | /* Convert to UTF-16 */ |
| 932 | utf16 = name_utf16; |
| 933 | s = name; |
| 934 | while (*s) |
| 935 | *utf16++ = *s++ & 0x7f; |
| 936 | *utf16 = 0; |
| 937 | |
| 938 | status = efi.get_variable(name_utf16, &guid, NULL, &size, data); |
| 939 | if (status != EFI_SUCCESS) { |
| 940 | printk(KERN_ERR "No EFI %s variable?\n", name); |
| 941 | return 0; |
| 942 | } |
| 943 | |
| 944 | hdr = (struct efi_generic_dev_path *) data; |
| 945 | end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size); |
| 946 | while (hdr < end_addr) { |
| 947 | if (hdr->type == EFI_DEV_MSG && |
| 948 | hdr->sub_type == EFI_DEV_MSG_UART) |
| 949 | uart = 1; |
| 950 | else if (hdr->type == EFI_DEV_END_PATH || |
| 951 | hdr->type == EFI_DEV_END_PATH2) { |
| 952 | if (!uart) |
| 953 | return 0; |
| 954 | if (hdr->sub_type == EFI_DEV_END_ENTIRE) |
| 955 | return 1; |
| 956 | uart = 0; |
| 957 | } |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 958 | hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | } |
| 960 | printk(KERN_ERR "Malformed %s value\n", name); |
| 961 | return 0; |
| 962 | } |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 963 | |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 964 | /* |
| 965 | * Look for the first granule aligned memory descriptor memory |
| 966 | * that is big enough to hold EFI memory map. Make sure this |
Adam Buchbinder | 45b79a2 | 2016-02-24 10:50:29 -0800 | [diff] [blame] | 967 | * descriptor is at least granule sized so it does not get trimmed |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 968 | */ |
| 969 | struct kern_memdesc * |
| 970 | find_memmap_space (void) |
| 971 | { |
| 972 | u64 contig_low=0, contig_high=0; |
| 973 | u64 as = 0, ae; |
| 974 | void *efi_map_start, *efi_map_end, *p, *q; |
| 975 | efi_memory_desc_t *md, *pmd = NULL, *check_md; |
| 976 | u64 space_needed, efi_desc_size; |
| 977 | unsigned long total_mem = 0; |
| 978 | |
| 979 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 980 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 981 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 982 | |
| 983 | /* |
| 984 | * Worst case: we need 3 kernel descriptors for each efi descriptor |
| 985 | * (if every entry has a WB part in the middle, and UC head and tail), |
| 986 | * plus one for the end marker. |
| 987 | */ |
| 988 | space_needed = sizeof(kern_memdesc_t) * |
| 989 | (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1); |
| 990 | |
| 991 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { |
| 992 | md = p; |
| 993 | if (!efi_wb(md)) { |
| 994 | continue; |
| 995 | } |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 996 | if (pmd == NULL || !efi_wb(pmd) || |
| 997 | efi_md_end(pmd) != md->phys_addr) { |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 998 | contig_low = GRANULEROUNDUP(md->phys_addr); |
| 999 | contig_high = efi_md_end(md); |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1000 | for (q = p + efi_desc_size; q < efi_map_end; |
| 1001 | q += efi_desc_size) { |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1002 | check_md = q; |
| 1003 | if (!efi_wb(check_md)) |
| 1004 | break; |
| 1005 | if (contig_high != check_md->phys_addr) |
| 1006 | break; |
| 1007 | contig_high = efi_md_end(check_md); |
| 1008 | } |
| 1009 | contig_high = GRANULEROUNDDOWN(contig_high); |
| 1010 | } |
Christoph Lameter | 66888a6 | 2006-12-04 14:58:35 -0800 | [diff] [blame] | 1011 | if (!is_memory_available(md) || md->type == EFI_LOADER_DATA) |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1012 | continue; |
| 1013 | |
| 1014 | /* Round ends inward to granule boundaries */ |
| 1015 | as = max(contig_low, md->phys_addr); |
| 1016 | ae = min(contig_high, efi_md_end(md)); |
| 1017 | |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1018 | /* keep within max_addr= and min_addr= command line arg */ |
| 1019 | as = max(as, min_addr); |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1020 | ae = min(ae, max_addr); |
| 1021 | if (ae <= as) |
| 1022 | continue; |
| 1023 | |
| 1024 | /* avoid going over mem= command line arg */ |
| 1025 | if (total_mem + (ae - as) > mem_limit) |
| 1026 | ae -= total_mem + (ae - as) - mem_limit; |
| 1027 | |
| 1028 | if (ae <= as) |
| 1029 | continue; |
| 1030 | |
| 1031 | if (ae - as > space_needed) |
| 1032 | break; |
| 1033 | } |
| 1034 | if (p >= efi_map_end) |
| 1035 | panic("Can't allocate space for kernel memory descriptors"); |
| 1036 | |
| 1037 | return __va(as); |
| 1038 | } |
| 1039 | |
| 1040 | /* |
| 1041 | * Walk the EFI memory map and gather all memory available for kernel |
| 1042 | * to use. We can allocate partial granules only if the unavailable |
| 1043 | * parts exist, and are WB. |
| 1044 | */ |
Bernhard Walle | cb38085 | 2007-10-18 23:41:00 -0700 | [diff] [blame] | 1045 | unsigned long |
Matthew Wilcox | e088a4a | 2009-05-22 13:49:49 -0700 | [diff] [blame] | 1046 | efi_memmap_init(u64 *s, u64 *e) |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1047 | { |
Keith Owens | e037cda | 2006-07-17 15:41:59 +1000 | [diff] [blame] | 1048 | struct kern_memdesc *k, *prev = NULL; |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1049 | u64 contig_low=0, contig_high=0; |
| 1050 | u64 as, ae, lim; |
| 1051 | void *efi_map_start, *efi_map_end, *p, *q; |
| 1052 | efi_memory_desc_t *md, *pmd = NULL, *check_md; |
| 1053 | u64 efi_desc_size; |
| 1054 | unsigned long total_mem = 0; |
| 1055 | |
| 1056 | k = kern_memmap = find_memmap_space(); |
| 1057 | |
| 1058 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 1059 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 1060 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 1061 | |
| 1062 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { |
| 1063 | md = p; |
| 1064 | if (!efi_wb(md)) { |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1065 | if (efi_uc(md) && |
| 1066 | (md->type == EFI_CONVENTIONAL_MEMORY || |
| 1067 | md->type == EFI_BOOT_SERVICES_DATA)) { |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1068 | k->attribute = EFI_MEMORY_UC; |
| 1069 | k->start = md->phys_addr; |
| 1070 | k->num_pages = md->num_pages; |
| 1071 | k++; |
| 1072 | } |
| 1073 | continue; |
| 1074 | } |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1075 | if (pmd == NULL || !efi_wb(pmd) || |
| 1076 | efi_md_end(pmd) != md->phys_addr) { |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1077 | contig_low = GRANULEROUNDUP(md->phys_addr); |
| 1078 | contig_high = efi_md_end(md); |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1079 | for (q = p + efi_desc_size; q < efi_map_end; |
| 1080 | q += efi_desc_size) { |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1081 | check_md = q; |
| 1082 | if (!efi_wb(check_md)) |
| 1083 | break; |
| 1084 | if (contig_high != check_md->phys_addr) |
| 1085 | break; |
| 1086 | contig_high = efi_md_end(check_md); |
| 1087 | } |
| 1088 | contig_high = GRANULEROUNDDOWN(contig_high); |
| 1089 | } |
Christoph Lameter | 66888a6 | 2006-12-04 14:58:35 -0800 | [diff] [blame] | 1090 | if (!is_memory_available(md)) |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1091 | continue; |
| 1092 | |
| 1093 | /* |
| 1094 | * Round ends inward to granule boundaries |
| 1095 | * Give trimmings to uncached allocator |
| 1096 | */ |
| 1097 | if (md->phys_addr < contig_low) { |
| 1098 | lim = min(efi_md_end(md), contig_low); |
| 1099 | if (efi_uc(md)) { |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1100 | if (k > kern_memmap && |
| 1101 | (k-1)->attribute == EFI_MEMORY_UC && |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1102 | kmd_end(k-1) == md->phys_addr) { |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1103 | (k-1)->num_pages += |
| 1104 | (lim - md->phys_addr) |
| 1105 | >> EFI_PAGE_SHIFT; |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1106 | } else { |
| 1107 | k->attribute = EFI_MEMORY_UC; |
| 1108 | k->start = md->phys_addr; |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1109 | k->num_pages = (lim - md->phys_addr) |
| 1110 | >> EFI_PAGE_SHIFT; |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1111 | k++; |
| 1112 | } |
| 1113 | } |
| 1114 | as = contig_low; |
| 1115 | } else |
| 1116 | as = md->phys_addr; |
| 1117 | |
| 1118 | if (efi_md_end(md) > contig_high) { |
| 1119 | lim = max(md->phys_addr, contig_high); |
| 1120 | if (efi_uc(md)) { |
| 1121 | if (lim == md->phys_addr && k > kern_memmap && |
| 1122 | (k-1)->attribute == EFI_MEMORY_UC && |
| 1123 | kmd_end(k-1) == md->phys_addr) { |
| 1124 | (k-1)->num_pages += md->num_pages; |
| 1125 | } else { |
| 1126 | k->attribute = EFI_MEMORY_UC; |
| 1127 | k->start = lim; |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1128 | k->num_pages = (efi_md_end(md) - lim) |
| 1129 | >> EFI_PAGE_SHIFT; |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1130 | k++; |
| 1131 | } |
| 1132 | } |
| 1133 | ae = contig_high; |
| 1134 | } else |
| 1135 | ae = efi_md_end(md); |
| 1136 | |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1137 | /* keep within max_addr= and min_addr= command line arg */ |
| 1138 | as = max(as, min_addr); |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1139 | ae = min(ae, max_addr); |
| 1140 | if (ae <= as) |
| 1141 | continue; |
| 1142 | |
| 1143 | /* avoid going over mem= command line arg */ |
| 1144 | if (total_mem + (ae - as) > mem_limit) |
| 1145 | ae -= total_mem + (ae - as) - mem_limit; |
| 1146 | |
| 1147 | if (ae <= as) |
| 1148 | continue; |
| 1149 | if (prev && kmd_end(prev) == md->phys_addr) { |
| 1150 | prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT; |
| 1151 | total_mem += ae - as; |
| 1152 | continue; |
| 1153 | } |
| 1154 | k->attribute = EFI_MEMORY_WB; |
| 1155 | k->start = as; |
| 1156 | k->num_pages = (ae - as) >> EFI_PAGE_SHIFT; |
| 1157 | total_mem += ae - as; |
| 1158 | prev = k++; |
| 1159 | } |
| 1160 | k->start = ~0L; /* end-marker */ |
| 1161 | |
| 1162 | /* reserve the memory we are using for kern_memmap */ |
| 1163 | *s = (u64)kern_memmap; |
| 1164 | *e = (u64)++k; |
Bernhard Walle | cb38085 | 2007-10-18 23:41:00 -0700 | [diff] [blame] | 1165 | |
| 1166 | return total_mem; |
Tony Luck | d8c97d5 | 2005-09-08 12:39:59 -0700 | [diff] [blame] | 1167 | } |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1168 | |
| 1169 | void |
| 1170 | efi_initialize_iomem_resources(struct resource *code_resource, |
Bernhard Walle | 00bf409 | 2007-10-21 16:42:01 -0700 | [diff] [blame] | 1171 | struct resource *data_resource, |
| 1172 | struct resource *bss_resource) |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1173 | { |
| 1174 | struct resource *res; |
| 1175 | void *efi_map_start, *efi_map_end, *p; |
| 1176 | efi_memory_desc_t *md; |
| 1177 | u64 efi_desc_size; |
| 1178 | char *name; |
Toshi Kani | 03cb525 | 2016-01-26 21:57:21 +0100 | [diff] [blame] | 1179 | unsigned long flags, desc; |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1180 | |
| 1181 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 1182 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 1183 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 1184 | |
| 1185 | res = NULL; |
| 1186 | |
| 1187 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
| 1188 | md = p; |
| 1189 | |
| 1190 | if (md->num_pages == 0) /* should not happen */ |
| 1191 | continue; |
| 1192 | |
Yasunori Goto | 887c3cb | 2007-11-14 16:59:20 -0800 | [diff] [blame] | 1193 | flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
Toshi Kani | 03cb525 | 2016-01-26 21:57:21 +0100 | [diff] [blame] | 1194 | desc = IORES_DESC_NONE; |
| 1195 | |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1196 | switch (md->type) { |
| 1197 | |
| 1198 | case EFI_MEMORY_MAPPED_IO: |
| 1199 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: |
| 1200 | continue; |
| 1201 | |
| 1202 | case EFI_LOADER_CODE: |
| 1203 | case EFI_LOADER_DATA: |
| 1204 | case EFI_BOOT_SERVICES_DATA: |
| 1205 | case EFI_BOOT_SERVICES_CODE: |
| 1206 | case EFI_CONVENTIONAL_MEMORY: |
| 1207 | if (md->attribute & EFI_MEMORY_WP) { |
| 1208 | name = "System ROM"; |
| 1209 | flags |= IORESOURCE_READONLY; |
Toshi Kani | 03cb525 | 2016-01-26 21:57:21 +0100 | [diff] [blame] | 1210 | } else if (md->attribute == EFI_MEMORY_UC) { |
Jay Lan | d3758f8 | 2008-09-22 14:21:19 -0700 | [diff] [blame] | 1211 | name = "Uncached RAM"; |
Toshi Kani | 03cb525 | 2016-01-26 21:57:21 +0100 | [diff] [blame] | 1212 | } else { |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1213 | name = "System RAM"; |
Toshi Kani | 03cb525 | 2016-01-26 21:57:21 +0100 | [diff] [blame] | 1214 | flags |= IORESOURCE_SYSRAM; |
| 1215 | } |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1216 | break; |
| 1217 | |
| 1218 | case EFI_ACPI_MEMORY_NVS: |
| 1219 | name = "ACPI Non-volatile Storage"; |
Toshi Kani | 03cb525 | 2016-01-26 21:57:21 +0100 | [diff] [blame] | 1220 | desc = IORES_DESC_ACPI_NV_STORAGE; |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1221 | break; |
| 1222 | |
| 1223 | case EFI_UNUSABLE_MEMORY: |
| 1224 | name = "reserved"; |
Yasunori Goto | 887c3cb | 2007-11-14 16:59:20 -0800 | [diff] [blame] | 1225 | flags |= IORESOURCE_DISABLED; |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1226 | break; |
| 1227 | |
Dan Williams | ad5fb87 | 2015-04-03 12:05:28 -0400 | [diff] [blame] | 1228 | case EFI_PERSISTENT_MEMORY: |
| 1229 | name = "Persistent Memory"; |
Toshi Kani | 03cb525 | 2016-01-26 21:57:21 +0100 | [diff] [blame] | 1230 | desc = IORES_DESC_PERSISTENT_MEMORY; |
Dan Williams | ad5fb87 | 2015-04-03 12:05:28 -0400 | [diff] [blame] | 1231 | break; |
| 1232 | |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1233 | case EFI_RESERVED_TYPE: |
| 1234 | case EFI_RUNTIME_SERVICES_CODE: |
| 1235 | case EFI_RUNTIME_SERVICES_DATA: |
| 1236 | case EFI_ACPI_RECLAIM_MEMORY: |
| 1237 | default: |
| 1238 | name = "reserved"; |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1239 | break; |
| 1240 | } |
| 1241 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1242 | if ((res = kzalloc(sizeof(struct resource), |
| 1243 | GFP_KERNEL)) == NULL) { |
| 1244 | printk(KERN_ERR |
Aron Griffis | 965e7c8 | 2008-01-08 22:29:37 -0500 | [diff] [blame] | 1245 | "failed to allocate resource for iomem\n"); |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1246 | return; |
| 1247 | } |
| 1248 | |
| 1249 | res->name = name; |
| 1250 | res->start = md->phys_addr; |
Li Zefan | 685c7f5 | 2007-11-21 14:58:26 -0800 | [diff] [blame] | 1251 | res->end = md->phys_addr + efi_md_size(md) - 1; |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1252 | res->flags = flags; |
Toshi Kani | 03cb525 | 2016-01-26 21:57:21 +0100 | [diff] [blame] | 1253 | res->desc = desc; |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1254 | |
| 1255 | if (insert_resource(&iomem_resource, res) < 0) |
| 1256 | kfree(res); |
| 1257 | else { |
| 1258 | /* |
| 1259 | * We don't know which region contains |
| 1260 | * kernel data so we try it repeatedly and |
| 1261 | * let the resource manager test it. |
| 1262 | */ |
| 1263 | insert_resource(res, code_resource); |
| 1264 | insert_resource(res, data_resource); |
Bernhard Walle | 00bf409 | 2007-10-21 16:42:01 -0700 | [diff] [blame] | 1265 | insert_resource(res, bss_resource); |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1266 | #ifdef CONFIG_KEXEC |
| 1267 | insert_resource(res, &efi_memmap_res); |
| 1268 | insert_resource(res, &boot_param_res); |
| 1269 | if (crashk_res.end > crashk_res.start) |
| 1270 | insert_resource(res, &crashk_res); |
| 1271 | #endif |
Khalid Aziz | be37912 | 2005-09-19 15:42:36 -0700 | [diff] [blame] | 1272 | } |
| 1273 | } |
| 1274 | } |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1275 | |
| 1276 | #ifdef CONFIG_KEXEC |
| 1277 | /* find a block of memory aligned to 64M exclude reserved regions |
| 1278 | rsvd_regions are sorted |
| 1279 | */ |
Horms | 2a3a282 | 2007-03-06 16:28:50 +0900 | [diff] [blame] | 1280 | unsigned long __init |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1281 | kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n) |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1282 | { |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1283 | int i; |
| 1284 | u64 start, end; |
| 1285 | u64 alignment = 1UL << _PAGE_SIZE_64M; |
| 1286 | void *efi_map_start, *efi_map_end, *p; |
| 1287 | efi_memory_desc_t *md; |
| 1288 | u64 efi_desc_size; |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1289 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1290 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 1291 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 1292 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1293 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1294 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
| 1295 | md = p; |
| 1296 | if (!efi_wb(md)) |
| 1297 | continue; |
| 1298 | start = ALIGN(md->phys_addr, alignment); |
| 1299 | end = efi_md_end(md); |
| 1300 | for (i = 0; i < n; i++) { |
| 1301 | if (__pa(r[i].start) >= start && __pa(r[i].end) < end) { |
| 1302 | if (__pa(r[i].start) > start + size) |
| 1303 | return start; |
| 1304 | start = ALIGN(__pa(r[i].end), alignment); |
| 1305 | if (i < n-1 && |
| 1306 | __pa(r[i+1].start) < start + size) |
| 1307 | continue; |
| 1308 | else |
| 1309 | break; |
| 1310 | } |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1311 | } |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1312 | if (end > start + size) |
| 1313 | return start; |
| 1314 | } |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1315 | |
Aron Griffis | 7d9aed2 | 2008-02-04 15:31:49 -0800 | [diff] [blame] | 1316 | printk(KERN_WARNING |
| 1317 | "Cannot reserve 0x%lx byte of memory for crashdump\n", size); |
| 1318 | return ~0UL; |
Zou Nan hai | a7956113 | 2006-12-07 09:51:35 -0800 | [diff] [blame] | 1319 | } |
| 1320 | #endif |
Magnus Damm | cee87af | 2007-03-06 02:34:26 -0800 | [diff] [blame] | 1321 | |
Simon Horman | d9a9855 | 2008-10-18 20:28:29 -0700 | [diff] [blame] | 1322 | #ifdef CONFIG_CRASH_DUMP |
Magnus Damm | cee87af | 2007-03-06 02:34:26 -0800 | [diff] [blame] | 1323 | /* locate the size find a the descriptor at a certain address */ |
Simon Horman | 1775fe85 | 2007-10-29 17:10:29 +0900 | [diff] [blame] | 1324 | unsigned long __init |
Magnus Damm | cee87af | 2007-03-06 02:34:26 -0800 | [diff] [blame] | 1325 | vmcore_find_descriptor_size (unsigned long address) |
| 1326 | { |
| 1327 | void *efi_map_start, *efi_map_end, *p; |
| 1328 | efi_memory_desc_t *md; |
| 1329 | u64 efi_desc_size; |
| 1330 | unsigned long ret = 0; |
| 1331 | |
| 1332 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
| 1333 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
| 1334 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
| 1335 | |
| 1336 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
| 1337 | md = p; |
| 1338 | if (efi_wb(md) && md->type == EFI_LOADER_DATA |
| 1339 | && md->phys_addr == address) { |
| 1340 | ret = efi_md_size(md); |
| 1341 | break; |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | if (ret == 0) |
| 1346 | printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n"); |
| 1347 | |
| 1348 | return ret; |
| 1349 | } |
| 1350 | #endif |