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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * Extensible Firmware Interface | |
4 | * | |
7d9aed26 AG |
5 | * Based on Extensible Firmware Interface Specification version 0.9 |
6 | * April 30, 1999 | |
1da177e4 LT |
7 | * |
8 | * Copyright (C) 1999 VA Linux Systems | |
9 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
10 | * Copyright (C) 1999-2003 Hewlett-Packard Co. | |
11 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
12 | * Stephane Eranian <eranian@hpl.hp.com> | |
32e62c63 BH |
13 | * (c) Copyright 2006 Hewlett-Packard Development Company, L.P. |
14 | * Bjorn Helgaas <bjorn.helgaas@hp.com> | |
1da177e4 LT |
15 | * |
16 | * All EFI Runtime Services are not implemented yet as EFI only | |
17 | * supports physical mode addressing on SoftSDV. This is to be fixed | |
18 | * in a future version. --drummond 1999-07-20 | |
19 | * | |
20 | * Implemented EFI runtime services and virtual mode calls. --davidm | |
21 | * | |
22 | * Goutham Rao: <goutham.rao@intel.com> | |
23 | * Skip non-WB memory and ignore empty memory ranges. | |
24 | */ | |
1da177e4 | 25 | #include <linux/module.h> |
57c8a661 | 26 | #include <linux/memblock.h> |
93a72052 | 27 | #include <linux/crash_dump.h> |
1da177e4 LT |
28 | #include <linux/kernel.h> |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
1da177e4 LT |
32 | #include <linux/time.h> |
33 | #include <linux/efi.h> | |
a7956113 | 34 | #include <linux/kexec.h> |
ed7ed365 | 35 | #include <linux/mm.h> |
1da177e4 LT |
36 | |
37 | #include <asm/io.h> | |
38 | #include <asm/kregs.h> | |
39 | #include <asm/meminit.h> | |
1da177e4 LT |
40 | #include <asm/processor.h> |
41 | #include <asm/mca.h> | |
a5b7c61e | 42 | #include <asm/sal.h> |
c140d879 | 43 | #include <asm/setup.h> |
2046b94e | 44 | #include <asm/tlbflush.h> |
1da177e4 LT |
45 | |
46 | #define EFI_DEBUG 0 | |
47 | ||
c0019f57 AB |
48 | #define ESI_TABLE_GUID \ |
49 | EFI_GUID(0x43EA58DC, 0xCF28, 0x4b06, 0xB3, \ | |
50 | 0x91, 0xB7, 0x50, 0x59, 0x34, 0x2B, 0xD4) | |
51 | ||
120540f2 | 52 | static unsigned long mps_phys = EFI_INVALID_TABLE_ADDR; |
272686bf LL |
53 | static __initdata unsigned long palo_phys; |
54 | ||
c0019f57 | 55 | unsigned long __initdata esi_phys = EFI_INVALID_TABLE_ADDR; |
120540f2 | 56 | unsigned long hcdp_phys = EFI_INVALID_TABLE_ADDR; |
5828efb9 AB |
57 | unsigned long sal_systab_phys = EFI_INVALID_TABLE_ADDR; |
58 | ||
06c0bd93 | 59 | static const efi_config_table_type_t arch_tables[] __initconst = { |
4e9a0f73 AB |
60 | {ESI_TABLE_GUID, &esi_phys, "ESI" }, |
61 | {HCDP_TABLE_GUID, &hcdp_phys, "HCDP" }, | |
62 | {MPS_TABLE_GUID, &mps_phys, "MPS" }, | |
63 | {PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID, &palo_phys, "PALO" }, | |
64 | {SAL_SYSTEM_TABLE_GUID, &sal_systab_phys, "SALsystab" }, | |
65 | {}, | |
272686bf LL |
66 | }; |
67 | ||
1da177e4 LT |
68 | extern efi_status_t efi_call_phys (void *, ...); |
69 | ||
1da177e4 | 70 | static efi_runtime_services_t *runtime; |
e088a4ad | 71 | static u64 mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL; |
1da177e4 LT |
72 | |
73 | #define efi_call_virt(f, args...) (*(f))(args) | |
74 | ||
7d9aed26 AG |
75 | #define STUB_GET_TIME(prefix, adjust_arg) \ |
76 | static efi_status_t \ | |
77 | prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \ | |
78 | { \ | |
79 | struct ia64_fpreg fr[6]; \ | |
80 | efi_time_cap_t *atc = NULL; \ | |
81 | efi_status_t ret; \ | |
82 | \ | |
83 | if (tc) \ | |
84 | atc = adjust_arg(tc); \ | |
85 | ia64_save_scratch_fpregs(fr); \ | |
86 | ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), \ | |
87 | adjust_arg(tm), atc); \ | |
88 | ia64_load_scratch_fpregs(fr); \ | |
89 | return ret; \ | |
1da177e4 LT |
90 | } |
91 | ||
7d9aed26 AG |
92 | #define STUB_SET_TIME(prefix, adjust_arg) \ |
93 | static efi_status_t \ | |
94 | prefix##_set_time (efi_time_t *tm) \ | |
95 | { \ | |
96 | struct ia64_fpreg fr[6]; \ | |
97 | efi_status_t ret; \ | |
98 | \ | |
99 | ia64_save_scratch_fpregs(fr); \ | |
100 | ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), \ | |
101 | adjust_arg(tm)); \ | |
102 | ia64_load_scratch_fpregs(fr); \ | |
103 | return ret; \ | |
1da177e4 LT |
104 | } |
105 | ||
7d9aed26 AG |
106 | #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \ |
107 | static efi_status_t \ | |
108 | prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, \ | |
109 | efi_time_t *tm) \ | |
110 | { \ | |
111 | struct ia64_fpreg fr[6]; \ | |
112 | efi_status_t ret; \ | |
113 | \ | |
114 | ia64_save_scratch_fpregs(fr); \ | |
115 | ret = efi_call_##prefix( \ | |
116 | (efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \ | |
117 | adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \ | |
118 | ia64_load_scratch_fpregs(fr); \ | |
119 | return ret; \ | |
1da177e4 LT |
120 | } |
121 | ||
7d9aed26 AG |
122 | #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \ |
123 | static efi_status_t \ | |
124 | prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \ | |
125 | { \ | |
126 | struct ia64_fpreg fr[6]; \ | |
127 | efi_time_t *atm = NULL; \ | |
128 | efi_status_t ret; \ | |
129 | \ | |
130 | if (tm) \ | |
131 | atm = adjust_arg(tm); \ | |
132 | ia64_save_scratch_fpregs(fr); \ | |
133 | ret = efi_call_##prefix( \ | |
134 | (efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \ | |
135 | enabled, atm); \ | |
136 | ia64_load_scratch_fpregs(fr); \ | |
137 | return ret; \ | |
1da177e4 LT |
138 | } |
139 | ||
7d9aed26 AG |
140 | #define STUB_GET_VARIABLE(prefix, adjust_arg) \ |
141 | static efi_status_t \ | |
142 | prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \ | |
143 | unsigned long *data_size, void *data) \ | |
144 | { \ | |
145 | struct ia64_fpreg fr[6]; \ | |
146 | u32 *aattr = NULL; \ | |
147 | efi_status_t ret; \ | |
148 | \ | |
149 | if (attr) \ | |
150 | aattr = adjust_arg(attr); \ | |
151 | ia64_save_scratch_fpregs(fr); \ | |
152 | ret = efi_call_##prefix( \ | |
153 | (efi_get_variable_t *) __va(runtime->get_variable), \ | |
154 | adjust_arg(name), adjust_arg(vendor), aattr, \ | |
155 | adjust_arg(data_size), adjust_arg(data)); \ | |
156 | ia64_load_scratch_fpregs(fr); \ | |
157 | return ret; \ | |
1da177e4 LT |
158 | } |
159 | ||
7d9aed26 AG |
160 | #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \ |
161 | static efi_status_t \ | |
162 | prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, \ | |
163 | efi_guid_t *vendor) \ | |
164 | { \ | |
165 | struct ia64_fpreg fr[6]; \ | |
166 | efi_status_t ret; \ | |
167 | \ | |
168 | ia64_save_scratch_fpregs(fr); \ | |
169 | ret = efi_call_##prefix( \ | |
170 | (efi_get_next_variable_t *) __va(runtime->get_next_variable), \ | |
171 | adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \ | |
172 | ia64_load_scratch_fpregs(fr); \ | |
173 | return ret; \ | |
1da177e4 LT |
174 | } |
175 | ||
7d9aed26 AG |
176 | #define STUB_SET_VARIABLE(prefix, adjust_arg) \ |
177 | static efi_status_t \ | |
178 | prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, \ | |
1eb9a4b8 | 179 | u32 attr, unsigned long data_size, \ |
7d9aed26 AG |
180 | void *data) \ |
181 | { \ | |
182 | struct ia64_fpreg fr[6]; \ | |
183 | efi_status_t ret; \ | |
184 | \ | |
185 | ia64_save_scratch_fpregs(fr); \ | |
186 | ret = efi_call_##prefix( \ | |
187 | (efi_set_variable_t *) __va(runtime->set_variable), \ | |
188 | adjust_arg(name), adjust_arg(vendor), attr, data_size, \ | |
189 | adjust_arg(data)); \ | |
190 | ia64_load_scratch_fpregs(fr); \ | |
191 | return ret; \ | |
1da177e4 LT |
192 | } |
193 | ||
7d9aed26 AG |
194 | #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \ |
195 | static efi_status_t \ | |
196 | prefix##_get_next_high_mono_count (u32 *count) \ | |
197 | { \ | |
198 | struct ia64_fpreg fr[6]; \ | |
199 | efi_status_t ret; \ | |
200 | \ | |
201 | ia64_save_scratch_fpregs(fr); \ | |
202 | ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \ | |
203 | __va(runtime->get_next_high_mono_count), \ | |
204 | adjust_arg(count)); \ | |
205 | ia64_load_scratch_fpregs(fr); \ | |
206 | return ret; \ | |
1da177e4 LT |
207 | } |
208 | ||
7d9aed26 AG |
209 | #define STUB_RESET_SYSTEM(prefix, adjust_arg) \ |
210 | static void \ | |
211 | prefix##_reset_system (int reset_type, efi_status_t status, \ | |
212 | unsigned long data_size, efi_char16_t *data) \ | |
213 | { \ | |
214 | struct ia64_fpreg fr[6]; \ | |
215 | efi_char16_t *adata = NULL; \ | |
216 | \ | |
217 | if (data) \ | |
218 | adata = adjust_arg(data); \ | |
219 | \ | |
220 | ia64_save_scratch_fpregs(fr); \ | |
221 | efi_call_##prefix( \ | |
222 | (efi_reset_system_t *) __va(runtime->reset_system), \ | |
223 | reset_type, status, data_size, adata); \ | |
224 | /* should not return, but just in case... */ \ | |
225 | ia64_load_scratch_fpregs(fr); \ | |
1da177e4 LT |
226 | } |
227 | ||
228 | #define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg)) | |
229 | ||
230 | STUB_GET_TIME(phys, phys_ptr) | |
231 | STUB_SET_TIME(phys, phys_ptr) | |
232 | STUB_GET_WAKEUP_TIME(phys, phys_ptr) | |
233 | STUB_SET_WAKEUP_TIME(phys, phys_ptr) | |
234 | STUB_GET_VARIABLE(phys, phys_ptr) | |
235 | STUB_GET_NEXT_VARIABLE(phys, phys_ptr) | |
236 | STUB_SET_VARIABLE(phys, phys_ptr) | |
237 | STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr) | |
238 | STUB_RESET_SYSTEM(phys, phys_ptr) | |
239 | ||
240 | #define id(arg) arg | |
241 | ||
242 | STUB_GET_TIME(virt, id) | |
243 | STUB_SET_TIME(virt, id) | |
244 | STUB_GET_WAKEUP_TIME(virt, id) | |
245 | STUB_SET_WAKEUP_TIME(virt, id) | |
246 | STUB_GET_VARIABLE(virt, id) | |
247 | STUB_GET_NEXT_VARIABLE(virt, id) | |
248 | STUB_SET_VARIABLE(virt, id) | |
249 | STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id) | |
250 | STUB_RESET_SYSTEM(virt, id) | |
251 | ||
252 | void | |
70f4f935 | 253 | efi_gettimeofday (struct timespec64 *ts) |
1da177e4 LT |
254 | { |
255 | efi_time_t tm; | |
256 | ||
4b07ae9b LZ |
257 | if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) { |
258 | memset(ts, 0, sizeof(*ts)); | |
1da177e4 | 259 | return; |
4b07ae9b | 260 | } |
1da177e4 | 261 | |
70f4f935 | 262 | ts->tv_sec = mktime64(tm.year, tm.month, tm.day, |
7d9aed26 | 263 | tm.hour, tm.minute, tm.second); |
1da177e4 LT |
264 | ts->tv_nsec = tm.nanosecond; |
265 | } | |
266 | ||
267 | static int | |
66888a6e | 268 | is_memory_available (efi_memory_desc_t *md) |
1da177e4 LT |
269 | { |
270 | if (!(md->attribute & EFI_MEMORY_WB)) | |
271 | return 0; | |
272 | ||
273 | switch (md->type) { | |
274 | case EFI_LOADER_CODE: | |
275 | case EFI_LOADER_DATA: | |
276 | case EFI_BOOT_SERVICES_CODE: | |
277 | case EFI_BOOT_SERVICES_DATA: | |
278 | case EFI_CONVENTIONAL_MEMORY: | |
279 | return 1; | |
280 | } | |
281 | return 0; | |
282 | } | |
283 | ||
d8c97d5f TL |
284 | typedef struct kern_memdesc { |
285 | u64 attribute; | |
286 | u64 start; | |
287 | u64 num_pages; | |
288 | } kern_memdesc_t; | |
1da177e4 | 289 | |
d8c97d5f | 290 | static kern_memdesc_t *kern_memmap; |
1da177e4 | 291 | |
80851ef2 BH |
292 | #define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT) |
293 | ||
294 | static inline u64 | |
295 | kmd_end(kern_memdesc_t *kmd) | |
296 | { | |
297 | return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT)); | |
298 | } | |
299 | ||
300 | static inline u64 | |
301 | efi_md_end(efi_memory_desc_t *md) | |
302 | { | |
303 | return (md->phys_addr + efi_md_size(md)); | |
304 | } | |
305 | ||
306 | static inline int | |
307 | efi_wb(efi_memory_desc_t *md) | |
308 | { | |
309 | return (md->attribute & EFI_MEMORY_WB); | |
310 | } | |
311 | ||
312 | static inline int | |
313 | efi_uc(efi_memory_desc_t *md) | |
314 | { | |
315 | return (md->attribute & EFI_MEMORY_UC); | |
316 | } | |
317 | ||
1da177e4 | 318 | static void |
d8c97d5f | 319 | walk (efi_freemem_callback_t callback, void *arg, u64 attr) |
1da177e4 | 320 | { |
d8c97d5f TL |
321 | kern_memdesc_t *k; |
322 | u64 start, end, voff; | |
1da177e4 | 323 | |
d8c97d5f TL |
324 | voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET; |
325 | for (k = kern_memmap; k->start != ~0UL; k++) { | |
326 | if (k->attribute != attr) | |
327 | continue; | |
328 | start = PAGE_ALIGN(k->start); | |
329 | end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK; | |
330 | if (start < end) | |
331 | if ((*callback)(start + voff, end + voff, arg) < 0) | |
332 | return; | |
333 | } | |
1da177e4 LT |
334 | } |
335 | ||
336 | /* | |
965e7c8a | 337 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
7d9aed26 | 338 | * descriptor that has memory that is available for OS use. |
1da177e4 LT |
339 | */ |
340 | void | |
341 | efi_memmap_walk (efi_freemem_callback_t callback, void *arg) | |
342 | { | |
d8c97d5f | 343 | walk(callback, arg, EFI_MEMORY_WB); |
1da177e4 LT |
344 | } |
345 | ||
f14f75b8 | 346 | /* |
965e7c8a | 347 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
7d9aed26 | 348 | * descriptor that has memory that is available for uncached allocator. |
f14f75b8 | 349 | */ |
d8c97d5f TL |
350 | void |
351 | efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg) | |
f14f75b8 | 352 | { |
d8c97d5f | 353 | walk(callback, arg, EFI_MEMORY_UC); |
f14f75b8 JS |
354 | } |
355 | ||
1da177e4 | 356 | /* |
965e7c8a | 357 | * Look for the PAL_CODE region reported by EFI and map it using an |
1da177e4 LT |
358 | * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor |
359 | * Abstraction Layer chapter 11 in ADAG | |
360 | */ | |
1da177e4 LT |
361 | void * |
362 | efi_get_pal_addr (void) | |
363 | { | |
364 | void *efi_map_start, *efi_map_end, *p; | |
365 | efi_memory_desc_t *md; | |
366 | u64 efi_desc_size; | |
367 | int pal_code_count = 0; | |
368 | u64 vaddr, mask; | |
369 | ||
370 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
371 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
372 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
373 | ||
374 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
375 | md = p; | |
376 | if (md->type != EFI_PAL_CODE) | |
377 | continue; | |
378 | ||
379 | if (++pal_code_count > 1) { | |
7d9aed26 | 380 | printk(KERN_ERR "Too many EFI Pal Code memory ranges, " |
e088a4ad | 381 | "dropped @ %llx\n", md->phys_addr); |
1da177e4 LT |
382 | continue; |
383 | } | |
384 | /* | |
7d9aed26 AG |
385 | * The only ITLB entry in region 7 that is used is the one |
386 | * installed by __start(). That entry covers a 64MB range. | |
1da177e4 LT |
387 | */ |
388 | mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1); | |
389 | vaddr = PAGE_OFFSET + md->phys_addr; | |
390 | ||
391 | /* | |
7d9aed26 AG |
392 | * We must check that the PAL mapping won't overlap with the |
393 | * kernel mapping. | |
1da177e4 | 394 | * |
7d9aed26 AG |
395 | * PAL code is guaranteed to be aligned on a power of 2 between |
396 | * 4k and 256KB and that only one ITR is needed to map it. This | |
397 | * implies that the PAL code is always aligned on its size, | |
398 | * i.e., the closest matching page size supported by the TLB. | |
399 | * Therefore PAL code is guaranteed never to cross a 64MB unless | |
400 | * it is bigger than 64MB (very unlikely!). So for now the | |
401 | * following test is enough to determine whether or not we need | |
402 | * a dedicated ITR for the PAL code. | |
1da177e4 LT |
403 | */ |
404 | if ((vaddr & mask) == (KERNEL_START & mask)) { | |
d4ed8084 HH |
405 | printk(KERN_INFO "%s: no need to install ITR for PAL code\n", |
406 | __func__); | |
1da177e4 LT |
407 | continue; |
408 | } | |
409 | ||
685c7f5d | 410 | if (efi_md_size(md) > IA64_GRANULE_SIZE) |
965e7c8a | 411 | panic("Whoa! PAL code size bigger than a granule!"); |
1da177e4 LT |
412 | |
413 | #if EFI_DEBUG | |
414 | mask = ~((1 << IA64_GRANULE_SHIFT) - 1); | |
415 | ||
7d9aed26 AG |
416 | printk(KERN_INFO "CPU %d: mapping PAL code " |
417 | "[0x%lx-0x%lx) into [0x%lx-0x%lx)\n", | |
418 | smp_processor_id(), md->phys_addr, | |
419 | md->phys_addr + efi_md_size(md), | |
420 | vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE); | |
1da177e4 LT |
421 | #endif |
422 | return __va(md->phys_addr); | |
423 | } | |
9473252f | 424 | printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n", |
d4ed8084 | 425 | __func__); |
1da177e4 LT |
426 | return NULL; |
427 | } | |
428 | ||
2046b94e FY |
429 | |
430 | static u8 __init palo_checksum(u8 *buffer, u32 length) | |
431 | { | |
432 | u8 sum = 0; | |
433 | u8 *end = buffer + length; | |
434 | ||
435 | while (buffer < end) | |
436 | sum = (u8) (sum + *(buffer++)); | |
437 | ||
438 | return sum; | |
439 | } | |
440 | ||
441 | /* | |
442 | * Parse and handle PALO table which is published at: | |
443 | * http://www.dig64.org/home/DIG64_PALO_R1_0.pdf | |
444 | */ | |
272686bf | 445 | static void __init handle_palo(unsigned long phys_addr) |
2046b94e | 446 | { |
272686bf | 447 | struct palo_table *palo = __va(phys_addr); |
2046b94e FY |
448 | u8 checksum; |
449 | ||
450 | if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) { | |
451 | printk(KERN_INFO "PALO signature incorrect.\n"); | |
452 | return; | |
453 | } | |
454 | ||
455 | checksum = palo_checksum((u8 *)palo, palo->length); | |
456 | if (checksum) { | |
457 | printk(KERN_INFO "PALO checksum incorrect.\n"); | |
458 | return; | |
459 | } | |
460 | ||
a6c75b86 | 461 | setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO); |
2046b94e FY |
462 | } |
463 | ||
1da177e4 LT |
464 | void |
465 | efi_map_pal_code (void) | |
466 | { | |
467 | void *pal_vaddr = efi_get_pal_addr (); | |
468 | u64 psr; | |
469 | ||
470 | if (!pal_vaddr) | |
471 | return; | |
472 | ||
473 | /* | |
474 | * Cannot write to CRx with PSR.ic=1 | |
475 | */ | |
476 | psr = ia64_clear_ic(); | |
7d9aed26 AG |
477 | ia64_itr(0x1, IA64_TR_PALCODE, |
478 | GRANULEROUNDDOWN((unsigned long) pal_vaddr), | |
1da177e4 LT |
479 | pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)), |
480 | IA64_GRANULE_SHIFT); | |
481 | ia64_set_psr(psr); /* restore psr */ | |
1da177e4 LT |
482 | } |
483 | ||
484 | void __init | |
485 | efi_init (void) | |
486 | { | |
beaf1c74 | 487 | const efi_system_table_t *efi_systab; |
1da177e4 | 488 | void *efi_map_start, *efi_map_end; |
1da177e4 | 489 | u64 efi_desc_size; |
14fb4209 | 490 | char *cp; |
1da177e4 | 491 | |
09206380 MF |
492 | set_bit(EFI_BOOT, &efi.flags); |
493 | set_bit(EFI_64BIT, &efi.flags); | |
494 | ||
7d9aed26 | 495 | /* |
965e7c8a | 496 | * It's too early to be able to use the standard kernel command line |
7d9aed26 AG |
497 | * support... |
498 | */ | |
a8d91b84 | 499 | for (cp = boot_command_line; *cp; ) { |
1da177e4 | 500 | if (memcmp(cp, "mem=", 4) == 0) { |
9d78f43d | 501 | mem_limit = memparse(cp + 4, &cp); |
1da177e4 | 502 | } else if (memcmp(cp, "max_addr=", 9) == 0) { |
9d78f43d | 503 | max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
a7956113 ZN |
504 | } else if (memcmp(cp, "min_addr=", 9) == 0) { |
505 | min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); | |
1da177e4 LT |
506 | } else { |
507 | while (*cp != ' ' && *cp) | |
508 | ++cp; | |
509 | while (*cp == ' ') | |
510 | ++cp; | |
511 | } | |
512 | } | |
a7956113 | 513 | if (min_addr != 0UL) |
e088a4ad | 514 | printk(KERN_INFO "Ignoring memory below %lluMB\n", |
7d9aed26 | 515 | min_addr >> 20); |
1da177e4 | 516 | if (max_addr != ~0UL) |
e088a4ad | 517 | printk(KERN_INFO "Ignoring memory above %lluMB\n", |
7d9aed26 | 518 | max_addr >> 20); |
1da177e4 | 519 | |
beaf1c74 | 520 | efi_systab = __va(ia64_boot_param->efi_systab); |
1da177e4 LT |
521 | |
522 | /* | |
523 | * Verify the EFI Table | |
524 | */ | |
beaf1c74 | 525 | if (efi_systab == NULL) |
965e7c8a | 526 | panic("Whoa! Can't find EFI system table.\n"); |
beaf1c74 | 527 | if (efi_systab_check_header(&efi_systab->hdr, 1)) |
965e7c8a | 528 | panic("Whoa! EFI system table signature incorrect\n"); |
1da177e4 | 529 | |
beaf1c74 | 530 | efi_systab_report_header(&efi_systab->hdr, efi_systab->fw_vendor); |
1da177e4 | 531 | |
2046b94e FY |
532 | palo_phys = EFI_INVALID_TABLE_ADDR; |
533 | ||
68631292 AB |
534 | if (efi_config_parse_tables(__va(efi_systab->tables), |
535 | efi_systab->nr_tables, | |
68631292 | 536 | arch_tables) != 0) |
272686bf | 537 | return; |
1da177e4 | 538 | |
2046b94e FY |
539 | if (palo_phys != EFI_INVALID_TABLE_ADDR) |
540 | handle_palo(palo_phys); | |
541 | ||
beaf1c74 | 542 | runtime = __va(efi_systab->runtime); |
1da177e4 LT |
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 | ||
7d9aed26 AG |
563 | for (i = 0, p = efi_map_start; p < efi_map_end; |
564 | ++i, p += efi_desc_size) | |
565 | { | |
818c7e86 SH |
566 | const char *unit; |
567 | unsigned long size; | |
77b12bcf | 568 | char buf[64]; |
818c7e86 | 569 | |
1da177e4 | 570 | md = p; |
818c7e86 SH |
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 | ||
77b12bcf | 587 | printk("mem%02d: %s " |
818c7e86 | 588 | "range=[0x%016lx-0x%016lx) (%4lu%s)\n", |
77b12bcf LE |
589 | i, efi_md_typeattr_format(buf, sizeof(buf), md), |
590 | md->phys_addr, | |
818c7e86 | 591 | md->phys_addr + efi_md_size(md), size, unit); |
1da177e4 LT |
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 | /* | |
7d9aed26 AG |
616 | * Some descriptors have multiple bits set, so the |
617 | * order of the tests is relevant. | |
1da177e4 LT |
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 | |
7d9aed26 AG |
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)); | |
1da177e4 LT |
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 | |
7d9aed26 AG |
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)); | |
1da177e4 LT |
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, | |
7d9aed26 AG |
655 | efi_desc_size, |
656 | ia64_boot_param->efi_memdesc_version, | |
1da177e4 LT |
657 | ia64_boot_param->efi_memmap); |
658 | if (status != EFI_SUCCESS) { | |
7d9aed26 AG |
659 | printk(KERN_WARNING "warning: unable to switch EFI into " |
660 | "virtual mode (status=%lu)\n", status); | |
1da177e4 LT |
661 | return; |
662 | } | |
663 | ||
09206380 MF |
664 | set_bit(EFI_RUNTIME_SERVICES, &efi.flags); |
665 | ||
1da177e4 | 666 | /* |
7d9aed26 AG |
667 | * Now that EFI is in virtual mode, we call the EFI functions more |
668 | * efficiently: | |
1da177e4 LT |
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 | /* | |
7d9aed26 AG |
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. | |
1da177e4 LT |
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 | ||
32e62c63 BH |
706 | static struct kern_memdesc * |
707 | kern_memory_descriptor (unsigned long phys_addr) | |
1da177e4 | 708 | { |
32e62c63 | 709 | struct kern_memdesc *md; |
1da177e4 | 710 | |
32e62c63 BH |
711 | for (md = kern_memmap; md->start != ~0UL; md++) { |
712 | if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT)) | |
80851ef2 | 713 | return md; |
1da177e4 | 714 | } |
e037cda5 | 715 | return NULL; |
1da177e4 LT |
716 | } |
717 | ||
32e62c63 BH |
718 | static efi_memory_desc_t * |
719 | efi_memory_descriptor (unsigned long phys_addr) | |
1da177e4 LT |
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 | ||
685c7f5d | 732 | if (phys_addr - md->phys_addr < efi_md_size(md)) |
32e62c63 | 733 | return md; |
1da177e4 | 734 | } |
e037cda5 | 735 | return NULL; |
1da177e4 | 736 | } |
80851ef2 | 737 | |
6d40fc51 BH |
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; | |
6d40fc51 BH |
754 | if (md->phys_addr < end && efi_md_end(md) > phys_addr) |
755 | return 1; | |
756 | } | |
757 | return 0; | |
758 | } | |
759 | ||
f99afd08 | 760 | int |
80851ef2 BH |
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; | |
f99afd08 | 767 | return -EINVAL; |
80851ef2 BH |
768 | } |
769 | ||
770 | u64 | |
771 | efi_mem_attributes (unsigned long phys_addr) | |
772 | { | |
773 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); | |
774 | ||
775 | if (md) | |
776 | return md->attribute; | |
777 | return 0; | |
778 | } | |
1da177e4 LT |
779 | EXPORT_SYMBOL(efi_mem_attributes); |
780 | ||
32e62c63 BH |
781 | u64 |
782 | efi_mem_attribute (unsigned long phys_addr, unsigned long size) | |
80851ef2 | 783 | { |
136939a2 | 784 | unsigned long end = phys_addr + size; |
80851ef2 | 785 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
32e62c63 BH |
786 | u64 attr; |
787 | ||
788 | if (!md) | |
789 | return 0; | |
790 | ||
791 | /* | |
792 | * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells | |
793 | * the kernel that firmware needs this region mapped. | |
794 | */ | |
795 | attr = md->attribute & ~EFI_MEMORY_RUNTIME; | |
796 | do { | |
797 | unsigned long md_end = efi_md_end(md); | |
798 | ||
799 | if (end <= md_end) | |
800 | return attr; | |
801 | ||
802 | md = efi_memory_descriptor(md_end); | |
803 | if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr) | |
804 | return 0; | |
805 | } while (md); | |
410ab512 | 806 | return 0; /* never reached */ |
32e62c63 BH |
807 | } |
808 | ||
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; | |
80851ef2 | 815 | |
136939a2 | 816 | /* |
32e62c63 BH |
817 | * This is a hack for ioremap calls before we set up kern_memmap. |
818 | * Maybe we should do efi_memmap_init() earlier instead. | |
136939a2 | 819 | */ |
32e62c63 BH |
820 | if (!kern_memmap) { |
821 | attr = efi_mem_attribute(phys_addr, size); | |
822 | if (attr & EFI_MEMORY_WB) | |
823 | return EFI_MEMORY_WB; | |
80851ef2 | 824 | return 0; |
136939a2 | 825 | } |
80851ef2 | 826 | |
32e62c63 BH |
827 | md = kern_memory_descriptor(phys_addr); |
828 | if (!md) | |
829 | return 0; | |
830 | ||
831 | attr = md->attribute; | |
80851ef2 | 832 | do { |
32e62c63 | 833 | unsigned long md_end = kmd_end(md); |
136939a2 BH |
834 | |
835 | if (end <= md_end) | |
32e62c63 | 836 | return attr; |
80851ef2 | 837 | |
32e62c63 BH |
838 | md = kern_memory_descriptor(md_end); |
839 | if (!md || md->attribute != attr) | |
136939a2 | 840 | return 0; |
80851ef2 | 841 | } while (md); |
410ab512 | 842 | return 0; /* never reached */ |
80851ef2 BH |
843 | } |
844 | ||
1da177e4 | 845 | int |
7e6735c3 | 846 | valid_phys_addr_range (phys_addr_t phys_addr, unsigned long size) |
1da177e4 | 847 | { |
32e62c63 BH |
848 | u64 attr; |
849 | ||
850 | /* | |
851 | * /dev/mem reads and writes use copy_to_user(), which implicitly | |
852 | * uses a granule-sized kernel identity mapping. It's really | |
853 | * only safe to do this for regions in kern_memmap. For more | |
db9a0975 | 854 | * details, see Documentation/ia64/aliasing.rst. |
32e62c63 BH |
855 | */ |
856 | attr = kern_mem_attribute(phys_addr, size); | |
857 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) | |
858 | return 1; | |
859 | return 0; | |
80851ef2 | 860 | } |
1da177e4 | 861 | |
80851ef2 | 862 | int |
06c67bef | 863 | valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size) |
80851ef2 | 864 | { |
6d40fc51 BH |
865 | unsigned long phys_addr = pfn << PAGE_SHIFT; |
866 | u64 attr; | |
867 | ||
868 | attr = efi_mem_attribute(phys_addr, size); | |
869 | ||
32e62c63 | 870 | /* |
6d40fc51 BH |
871 | * /dev/mem mmap uses normal user pages, so we don't need the entire |
872 | * granule, but the entire region we're mapping must support the same | |
873 | * attribute. | |
32e62c63 | 874 | */ |
6d40fc51 BH |
875 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) |
876 | return 1; | |
877 | ||
878 | /* | |
879 | * Intel firmware doesn't tell us about all the MMIO regions, so | |
880 | * in general we have to allow mmap requests. But if EFI *does* | |
881 | * tell us about anything inside this region, we should deny it. | |
882 | * The user can always map a smaller region to avoid the overlap. | |
883 | */ | |
884 | if (efi_memmap_intersects(phys_addr, size)) | |
885 | return 0; | |
886 | ||
32e62c63 BH |
887 | return 1; |
888 | } | |
1da177e4 | 889 | |
32e62c63 BH |
890 | pgprot_t |
891 | phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, | |
892 | pgprot_t vma_prot) | |
893 | { | |
894 | unsigned long phys_addr = pfn << PAGE_SHIFT; | |
895 | u64 attr; | |
1da177e4 | 896 | |
32e62c63 BH |
897 | /* |
898 | * For /dev/mem mmap, we use user mappings, but if the region is | |
899 | * in kern_memmap (and hence may be covered by a kernel mapping), | |
900 | * we must use the same attribute as the kernel mapping. | |
901 | */ | |
902 | attr = kern_mem_attribute(phys_addr, size); | |
903 | if (attr & EFI_MEMORY_WB) | |
904 | return pgprot_cacheable(vma_prot); | |
905 | else if (attr & EFI_MEMORY_UC) | |
906 | return pgprot_noncached(vma_prot); | |
907 | ||
908 | /* | |
909 | * Some chipsets don't support UC access to memory. If | |
910 | * WB is supported, we prefer that. | |
911 | */ | |
912 | if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB) | |
913 | return pgprot_cacheable(vma_prot); | |
914 | ||
915 | return pgprot_noncached(vma_prot); | |
1da177e4 LT |
916 | } |
917 | ||
918 | int __init | |
919 | efi_uart_console_only(void) | |
920 | { | |
921 | efi_status_t status; | |
922 | char *s, name[] = "ConOut"; | |
923 | efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID; | |
924 | efi_char16_t *utf16, name_utf16[32]; | |
925 | unsigned char data[1024]; | |
926 | unsigned long size = sizeof(data); | |
927 | struct efi_generic_dev_path *hdr, *end_addr; | |
928 | int uart = 0; | |
929 | ||
930 | /* Convert to UTF-16 */ | |
931 | utf16 = name_utf16; | |
932 | s = name; | |
933 | while (*s) | |
934 | *utf16++ = *s++ & 0x7f; | |
935 | *utf16 = 0; | |
936 | ||
937 | status = efi.get_variable(name_utf16, &guid, NULL, &size, data); | |
938 | if (status != EFI_SUCCESS) { | |
939 | printk(KERN_ERR "No EFI %s variable?\n", name); | |
940 | return 0; | |
941 | } | |
942 | ||
943 | hdr = (struct efi_generic_dev_path *) data; | |
944 | end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size); | |
945 | while (hdr < end_addr) { | |
946 | if (hdr->type == EFI_DEV_MSG && | |
947 | hdr->sub_type == EFI_DEV_MSG_UART) | |
948 | uart = 1; | |
949 | else if (hdr->type == EFI_DEV_END_PATH || | |
950 | hdr->type == EFI_DEV_END_PATH2) { | |
951 | if (!uart) | |
952 | return 0; | |
953 | if (hdr->sub_type == EFI_DEV_END_ENTIRE) | |
954 | return 1; | |
955 | uart = 0; | |
956 | } | |
7d9aed26 | 957 | hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length); |
1da177e4 LT |
958 | } |
959 | printk(KERN_ERR "Malformed %s value\n", name); | |
960 | return 0; | |
961 | } | |
d8c97d5f | 962 | |
d8c97d5f TL |
963 | /* |
964 | * Look for the first granule aligned memory descriptor memory | |
965 | * that is big enough to hold EFI memory map. Make sure this | |
45b79a29 | 966 | * descriptor is at least granule sized so it does not get trimmed |
d8c97d5f TL |
967 | */ |
968 | struct kern_memdesc * | |
969 | find_memmap_space (void) | |
970 | { | |
971 | u64 contig_low=0, contig_high=0; | |
972 | u64 as = 0, ae; | |
973 | void *efi_map_start, *efi_map_end, *p, *q; | |
974 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
975 | u64 space_needed, efi_desc_size; | |
976 | unsigned long total_mem = 0; | |
977 | ||
978 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
979 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
980 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
981 | ||
982 | /* | |
983 | * Worst case: we need 3 kernel descriptors for each efi descriptor | |
984 | * (if every entry has a WB part in the middle, and UC head and tail), | |
985 | * plus one for the end marker. | |
986 | */ | |
987 | space_needed = sizeof(kern_memdesc_t) * | |
988 | (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1); | |
989 | ||
990 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
991 | md = p; | |
992 | if (!efi_wb(md)) { | |
993 | continue; | |
994 | } | |
7d9aed26 AG |
995 | if (pmd == NULL || !efi_wb(pmd) || |
996 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
997 | contig_low = GRANULEROUNDUP(md->phys_addr); |
998 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
999 | for (q = p + efi_desc_size; q < efi_map_end; |
1000 | q += efi_desc_size) { | |
d8c97d5f TL |
1001 | check_md = q; |
1002 | if (!efi_wb(check_md)) | |
1003 | break; | |
1004 | if (contig_high != check_md->phys_addr) | |
1005 | break; | |
1006 | contig_high = efi_md_end(check_md); | |
1007 | } | |
1008 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1009 | } | |
66888a6e | 1010 | if (!is_memory_available(md) || md->type == EFI_LOADER_DATA) |
d8c97d5f TL |
1011 | continue; |
1012 | ||
1013 | /* Round ends inward to granule boundaries */ | |
1014 | as = max(contig_low, md->phys_addr); | |
1015 | ae = min(contig_high, efi_md_end(md)); | |
1016 | ||
a7956113 ZN |
1017 | /* keep within max_addr= and min_addr= command line arg */ |
1018 | as = max(as, min_addr); | |
d8c97d5f TL |
1019 | ae = min(ae, max_addr); |
1020 | if (ae <= as) | |
1021 | continue; | |
1022 | ||
1023 | /* avoid going over mem= command line arg */ | |
1024 | if (total_mem + (ae - as) > mem_limit) | |
1025 | ae -= total_mem + (ae - as) - mem_limit; | |
1026 | ||
1027 | if (ae <= as) | |
1028 | continue; | |
1029 | ||
1030 | if (ae - as > space_needed) | |
1031 | break; | |
1032 | } | |
1033 | if (p >= efi_map_end) | |
1034 | panic("Can't allocate space for kernel memory descriptors"); | |
1035 | ||
1036 | return __va(as); | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Walk the EFI memory map and gather all memory available for kernel | |
1041 | * to use. We can allocate partial granules only if the unavailable | |
1042 | * parts exist, and are WB. | |
1043 | */ | |
cb380853 | 1044 | unsigned long |
e088a4ad | 1045 | efi_memmap_init(u64 *s, u64 *e) |
d8c97d5f | 1046 | { |
e037cda5 | 1047 | struct kern_memdesc *k, *prev = NULL; |
d8c97d5f TL |
1048 | u64 contig_low=0, contig_high=0; |
1049 | u64 as, ae, lim; | |
1050 | void *efi_map_start, *efi_map_end, *p, *q; | |
1051 | efi_memory_desc_t *md, *pmd = NULL, *check_md; | |
1052 | u64 efi_desc_size; | |
1053 | unsigned long total_mem = 0; | |
1054 | ||
1055 | k = kern_memmap = find_memmap_space(); | |
1056 | ||
1057 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1058 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1059 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1060 | ||
1061 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { | |
1062 | md = p; | |
1063 | if (!efi_wb(md)) { | |
7d9aed26 AG |
1064 | if (efi_uc(md) && |
1065 | (md->type == EFI_CONVENTIONAL_MEMORY || | |
1066 | md->type == EFI_BOOT_SERVICES_DATA)) { | |
d8c97d5f TL |
1067 | k->attribute = EFI_MEMORY_UC; |
1068 | k->start = md->phys_addr; | |
1069 | k->num_pages = md->num_pages; | |
1070 | k++; | |
1071 | } | |
1072 | continue; | |
1073 | } | |
7d9aed26 AG |
1074 | if (pmd == NULL || !efi_wb(pmd) || |
1075 | efi_md_end(pmd) != md->phys_addr) { | |
d8c97d5f TL |
1076 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1077 | contig_high = efi_md_end(md); | |
7d9aed26 AG |
1078 | for (q = p + efi_desc_size; q < efi_map_end; |
1079 | q += efi_desc_size) { | |
d8c97d5f TL |
1080 | check_md = q; |
1081 | if (!efi_wb(check_md)) | |
1082 | break; | |
1083 | if (contig_high != check_md->phys_addr) | |
1084 | break; | |
1085 | contig_high = efi_md_end(check_md); | |
1086 | } | |
1087 | contig_high = GRANULEROUNDDOWN(contig_high); | |
1088 | } | |
66888a6e | 1089 | if (!is_memory_available(md)) |
d8c97d5f TL |
1090 | continue; |
1091 | ||
1092 | /* | |
1093 | * Round ends inward to granule boundaries | |
1094 | * Give trimmings to uncached allocator | |
1095 | */ | |
1096 | if (md->phys_addr < contig_low) { | |
1097 | lim = min(efi_md_end(md), contig_low); | |
1098 | if (efi_uc(md)) { | |
7d9aed26 AG |
1099 | if (k > kern_memmap && |
1100 | (k-1)->attribute == EFI_MEMORY_UC && | |
d8c97d5f | 1101 | kmd_end(k-1) == md->phys_addr) { |
7d9aed26 AG |
1102 | (k-1)->num_pages += |
1103 | (lim - md->phys_addr) | |
1104 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1105 | } else { |
1106 | k->attribute = EFI_MEMORY_UC; | |
1107 | k->start = md->phys_addr; | |
7d9aed26 AG |
1108 | k->num_pages = (lim - md->phys_addr) |
1109 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1110 | k++; |
1111 | } | |
1112 | } | |
1113 | as = contig_low; | |
1114 | } else | |
1115 | as = md->phys_addr; | |
1116 | ||
1117 | if (efi_md_end(md) > contig_high) { | |
1118 | lim = max(md->phys_addr, contig_high); | |
1119 | if (efi_uc(md)) { | |
1120 | if (lim == md->phys_addr && k > kern_memmap && | |
1121 | (k-1)->attribute == EFI_MEMORY_UC && | |
1122 | kmd_end(k-1) == md->phys_addr) { | |
1123 | (k-1)->num_pages += md->num_pages; | |
1124 | } else { | |
1125 | k->attribute = EFI_MEMORY_UC; | |
1126 | k->start = lim; | |
7d9aed26 AG |
1127 | k->num_pages = (efi_md_end(md) - lim) |
1128 | >> EFI_PAGE_SHIFT; | |
d8c97d5f TL |
1129 | k++; |
1130 | } | |
1131 | } | |
1132 | ae = contig_high; | |
1133 | } else | |
1134 | ae = efi_md_end(md); | |
1135 | ||
a7956113 ZN |
1136 | /* keep within max_addr= and min_addr= command line arg */ |
1137 | as = max(as, min_addr); | |
d8c97d5f TL |
1138 | ae = min(ae, max_addr); |
1139 | if (ae <= as) | |
1140 | continue; | |
1141 | ||
1142 | /* avoid going over mem= command line arg */ | |
1143 | if (total_mem + (ae - as) > mem_limit) | |
1144 | ae -= total_mem + (ae - as) - mem_limit; | |
1145 | ||
1146 | if (ae <= as) | |
1147 | continue; | |
1148 | if (prev && kmd_end(prev) == md->phys_addr) { | |
1149 | prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT; | |
1150 | total_mem += ae - as; | |
1151 | continue; | |
1152 | } | |
1153 | k->attribute = EFI_MEMORY_WB; | |
1154 | k->start = as; | |
1155 | k->num_pages = (ae - as) >> EFI_PAGE_SHIFT; | |
1156 | total_mem += ae - as; | |
1157 | prev = k++; | |
1158 | } | |
1159 | k->start = ~0L; /* end-marker */ | |
1160 | ||
1161 | /* reserve the memory we are using for kern_memmap */ | |
1162 | *s = (u64)kern_memmap; | |
1163 | *e = (u64)++k; | |
cb380853 BW |
1164 | |
1165 | return total_mem; | |
d8c97d5f | 1166 | } |
be379124 KA |
1167 | |
1168 | void | |
1169 | efi_initialize_iomem_resources(struct resource *code_resource, | |
00bf4098 BW |
1170 | struct resource *data_resource, |
1171 | struct resource *bss_resource) | |
be379124 KA |
1172 | { |
1173 | struct resource *res; | |
1174 | void *efi_map_start, *efi_map_end, *p; | |
1175 | efi_memory_desc_t *md; | |
1176 | u64 efi_desc_size; | |
1177 | char *name; | |
03cb525e | 1178 | unsigned long flags, desc; |
be379124 KA |
1179 | |
1180 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1181 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1182 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1183 | ||
1184 | res = NULL; | |
1185 | ||
1186 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1187 | md = p; | |
1188 | ||
1189 | if (md->num_pages == 0) /* should not happen */ | |
1190 | continue; | |
1191 | ||
887c3cb1 | 1192 | flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
03cb525e TK |
1193 | desc = IORES_DESC_NONE; |
1194 | ||
be379124 KA |
1195 | switch (md->type) { |
1196 | ||
1197 | case EFI_MEMORY_MAPPED_IO: | |
1198 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
1199 | continue; | |
1200 | ||
1201 | case EFI_LOADER_CODE: | |
1202 | case EFI_LOADER_DATA: | |
1203 | case EFI_BOOT_SERVICES_DATA: | |
1204 | case EFI_BOOT_SERVICES_CODE: | |
1205 | case EFI_CONVENTIONAL_MEMORY: | |
1206 | if (md->attribute & EFI_MEMORY_WP) { | |
1207 | name = "System ROM"; | |
1208 | flags |= IORESOURCE_READONLY; | |
03cb525e | 1209 | } else if (md->attribute == EFI_MEMORY_UC) { |
d3758f87 | 1210 | name = "Uncached RAM"; |
03cb525e | 1211 | } else { |
be379124 | 1212 | name = "System RAM"; |
03cb525e TK |
1213 | flags |= IORESOURCE_SYSRAM; |
1214 | } | |
be379124 KA |
1215 | break; |
1216 | ||
1217 | case EFI_ACPI_MEMORY_NVS: | |
1218 | name = "ACPI Non-volatile Storage"; | |
03cb525e | 1219 | desc = IORES_DESC_ACPI_NV_STORAGE; |
be379124 KA |
1220 | break; |
1221 | ||
1222 | case EFI_UNUSABLE_MEMORY: | |
1223 | name = "reserved"; | |
887c3cb1 | 1224 | flags |= IORESOURCE_DISABLED; |
be379124 KA |
1225 | break; |
1226 | ||
ad5fb870 DW |
1227 | case EFI_PERSISTENT_MEMORY: |
1228 | name = "Persistent Memory"; | |
03cb525e | 1229 | desc = IORES_DESC_PERSISTENT_MEMORY; |
ad5fb870 DW |
1230 | break; |
1231 | ||
be379124 KA |
1232 | case EFI_RESERVED_TYPE: |
1233 | case EFI_RUNTIME_SERVICES_CODE: | |
1234 | case EFI_RUNTIME_SERVICES_DATA: | |
1235 | case EFI_ACPI_RECLAIM_MEMORY: | |
1236 | default: | |
1237 | name = "reserved"; | |
be379124 KA |
1238 | break; |
1239 | } | |
1240 | ||
7d9aed26 AG |
1241 | if ((res = kzalloc(sizeof(struct resource), |
1242 | GFP_KERNEL)) == NULL) { | |
1243 | printk(KERN_ERR | |
965e7c8a | 1244 | "failed to allocate resource for iomem\n"); |
be379124 KA |
1245 | return; |
1246 | } | |
1247 | ||
1248 | res->name = name; | |
1249 | res->start = md->phys_addr; | |
685c7f5d | 1250 | res->end = md->phys_addr + efi_md_size(md) - 1; |
be379124 | 1251 | res->flags = flags; |
03cb525e | 1252 | res->desc = desc; |
be379124 KA |
1253 | |
1254 | if (insert_resource(&iomem_resource, res) < 0) | |
1255 | kfree(res); | |
1256 | else { | |
1257 | /* | |
1258 | * We don't know which region contains | |
1259 | * kernel data so we try it repeatedly and | |
1260 | * let the resource manager test it. | |
1261 | */ | |
1262 | insert_resource(res, code_resource); | |
1263 | insert_resource(res, data_resource); | |
00bf4098 | 1264 | insert_resource(res, bss_resource); |
a7956113 ZN |
1265 | #ifdef CONFIG_KEXEC |
1266 | insert_resource(res, &efi_memmap_res); | |
1267 | insert_resource(res, &boot_param_res); | |
1268 | if (crashk_res.end > crashk_res.start) | |
1269 | insert_resource(res, &crashk_res); | |
1270 | #endif | |
be379124 KA |
1271 | } |
1272 | } | |
1273 | } | |
a7956113 ZN |
1274 | |
1275 | #ifdef CONFIG_KEXEC | |
1276 | /* find a block of memory aligned to 64M exclude reserved regions | |
1277 | rsvd_regions are sorted | |
1278 | */ | |
2a3a2827 | 1279 | unsigned long __init |
7d9aed26 | 1280 | kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n) |
a7956113 | 1281 | { |
7d9aed26 AG |
1282 | int i; |
1283 | u64 start, end; | |
1284 | u64 alignment = 1UL << _PAGE_SIZE_64M; | |
1285 | void *efi_map_start, *efi_map_end, *p; | |
1286 | efi_memory_desc_t *md; | |
1287 | u64 efi_desc_size; | |
1288 | ||
1289 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1290 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1291 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1292 | ||
1293 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1294 | md = p; | |
1295 | if (!efi_wb(md)) | |
1296 | continue; | |
1297 | start = ALIGN(md->phys_addr, alignment); | |
1298 | end = efi_md_end(md); | |
1299 | for (i = 0; i < n; i++) { | |
1300 | if (__pa(r[i].start) >= start && __pa(r[i].end) < end) { | |
1301 | if (__pa(r[i].start) > start + size) | |
1302 | return start; | |
1303 | start = ALIGN(__pa(r[i].end), alignment); | |
1304 | if (i < n-1 && | |
1305 | __pa(r[i+1].start) < start + size) | |
1306 | continue; | |
1307 | else | |
1308 | break; | |
1309 | } | |
a7956113 | 1310 | } |
7d9aed26 AG |
1311 | if (end > start + size) |
1312 | return start; | |
1313 | } | |
1314 | ||
1315 | printk(KERN_WARNING | |
1316 | "Cannot reserve 0x%lx byte of memory for crashdump\n", size); | |
1317 | return ~0UL; | |
a7956113 ZN |
1318 | } |
1319 | #endif | |
cee87af2 | 1320 | |
d9a9855d | 1321 | #ifdef CONFIG_CRASH_DUMP |
cee87af2 | 1322 | /* locate the size find a the descriptor at a certain address */ |
1775fe85 | 1323 | unsigned long __init |
cee87af2 MD |
1324 | vmcore_find_descriptor_size (unsigned long address) |
1325 | { | |
1326 | void *efi_map_start, *efi_map_end, *p; | |
1327 | efi_memory_desc_t *md; | |
1328 | u64 efi_desc_size; | |
1329 | unsigned long ret = 0; | |
1330 | ||
1331 | efi_map_start = __va(ia64_boot_param->efi_memmap); | |
1332 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; | |
1333 | efi_desc_size = ia64_boot_param->efi_memdesc_size; | |
1334 | ||
1335 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { | |
1336 | md = p; | |
1337 | if (efi_wb(md) && md->type == EFI_LOADER_DATA | |
1338 | && md->phys_addr == address) { | |
1339 | ret = efi_md_size(md); | |
1340 | break; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | if (ret == 0) | |
1345 | printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n"); | |
1346 | ||
1347 | return ret; | |
1348 | } | |
1349 | #endif | |
120540f2 AB |
1350 | |
1351 | char *efi_systab_show_arch(char *str) | |
1352 | { | |
1353 | if (mps_phys != EFI_INVALID_TABLE_ADDR) | |
1354 | str += sprintf(str, "MPS=0x%lx\n", mps_phys); | |
1355 | if (hcdp_phys != EFI_INVALID_TABLE_ADDR) | |
1356 | str += sprintf(str, "HCDP=0x%lx\n", hcdp_phys); | |
1357 | return str; | |
1358 | } |