Commit | Line | Data |
---|---|---|
9b6b563c PM |
1 | /* |
2 | * Procedures for creating, accessing and interpreting the device tree. | |
3 | * | |
4 | * Paul Mackerras August 1996. | |
5 | * Copyright (C) 1996-2005 Paul Mackerras. | |
6 | * | |
7 | * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. | |
8 | * {engebret|bergner}@us.ibm.com | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #undef DEBUG | |
17 | ||
18 | #include <stdarg.h> | |
9b6b563c PM |
19 | #include <linux/kernel.h> |
20 | #include <linux/string.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/threads.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/pci.h> | |
26 | #include <linux/stringify.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/initrd.h> | |
29 | #include <linux/bitops.h> | |
4b16f8e2 | 30 | #include <linux/export.h> |
dcee3036 | 31 | #include <linux/kexec.h> |
0ebfff14 | 32 | #include <linux/irq.h> |
95f72d1e | 33 | #include <linux/memblock.h> |
1cf3d8b3 | 34 | #include <linux/of.h> |
708b7eef | 35 | #include <linux/of_fdt.h> |
060f78c2 | 36 | #include <linux/libfdt.h> |
7f92bc56 | 37 | #include <linux/cpu.h> |
9b6b563c PM |
38 | |
39 | #include <asm/prom.h> | |
40 | #include <asm/rtas.h> | |
9b6b563c PM |
41 | #include <asm/page.h> |
42 | #include <asm/processor.h> | |
43 | #include <asm/irq.h> | |
44 | #include <asm/io.h> | |
0cc4746c | 45 | #include <asm/kdump.h> |
9b6b563c | 46 | #include <asm/smp.h> |
9b6b563c | 47 | #include <asm/mmu.h> |
1426d5a3 | 48 | #include <asm/paca.h> |
9b6b563c | 49 | #include <asm/pgtable.h> |
54820530 | 50 | #include <asm/powernv.h> |
9b6b563c PM |
51 | #include <asm/iommu.h> |
52 | #include <asm/btext.h> | |
53 | #include <asm/sections.h> | |
54 | #include <asm/machdep.h> | |
40ef8cbc | 55 | #include <asm/pci-bridge.h> |
2babf5c2 | 56 | #include <asm/kexec.h> |
14a43e69 | 57 | #include <asm/opal.h> |
eb39c880 | 58 | #include <asm/fadump.h> |
da6a97bf | 59 | #include <asm/epapr_hcalls.h> |
3808a889 | 60 | #include <asm/firmware.h> |
5a61ef74 | 61 | #include <asm/dt_cpu_ftrs.h> |
6c6ea537 | 62 | #include <asm/drmem.h> |
14a43e69 | 63 | |
37dd2bad | 64 | #include <mm/mmu_decl.h> |
9b6b563c PM |
65 | |
66 | #ifdef DEBUG | |
67 | #define DBG(fmt...) printk(KERN_ERR fmt) | |
68 | #else | |
69 | #define DBG(fmt...) | |
70 | #endif | |
71 | ||
9b6b563c | 72 | #ifdef CONFIG_PPC64 |
28897731 | 73 | int __initdata iommu_is_off; |
9b6b563c | 74 | int __initdata iommu_force_on; |
cf00a8d1 | 75 | unsigned long tce_alloc_start, tce_alloc_end; |
cd3db0c4 | 76 | u64 ppc64_rma_size; |
9b6b563c | 77 | #endif |
03bf469a | 78 | static phys_addr_t first_memblock_size; |
7ac87abb | 79 | static int __initdata boot_cpu_count; |
9b6b563c | 80 | |
2babf5c2 ME |
81 | static int __init early_parse_mem(char *p) |
82 | { | |
83 | if (!p) | |
84 | return 1; | |
85 | ||
86 | memory_limit = PAGE_ALIGN(memparse(p, &p)); | |
a84fcd46 | 87 | DBG("memory limit = 0x%llx\n", memory_limit); |
2babf5c2 ME |
88 | |
89 | return 0; | |
90 | } | |
91 | early_param("mem", early_parse_mem); | |
92 | ||
307cfe71 BH |
93 | /* |
94 | * overlaps_initrd - check for overlap with page aligned extension of | |
95 | * initrd. | |
96 | */ | |
97 | static inline int overlaps_initrd(unsigned long start, unsigned long size) | |
98 | { | |
99 | #ifdef CONFIG_BLK_DEV_INITRD | |
100 | if (!initrd_start) | |
101 | return 0; | |
102 | ||
103 | return (start + size) > _ALIGN_DOWN(initrd_start, PAGE_SIZE) && | |
104 | start <= _ALIGN_UP(initrd_end, PAGE_SIZE); | |
105 | #else | |
106 | return 0; | |
107 | #endif | |
108 | } | |
109 | ||
3c607ce2 LV |
110 | /** |
111 | * move_device_tree - move tree to an unused area, if needed. | |
112 | * | |
113 | * The device tree may be allocated beyond our memory limit, or inside the | |
307cfe71 BH |
114 | * crash kernel region for kdump, or within the page aligned range of initrd. |
115 | * If so, move it out of the way. | |
2babf5c2 | 116 | */ |
18f032cb | 117 | static void __init move_device_tree(void) |
2babf5c2 ME |
118 | { |
119 | unsigned long start, size; | |
120 | void *p; | |
121 | ||
122 | DBG("-> move_device_tree\n"); | |
123 | ||
124 | start = __pa(initial_boot_params); | |
060f78c2 | 125 | size = fdt_totalsize(initial_boot_params); |
2babf5c2 | 126 | |
6dd22700 | 127 | if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) || |
307cfe71 BH |
128 | overlaps_crashkernel(start, size) || |
129 | overlaps_initrd(start, size)) { | |
e63075a3 | 130 | p = __va(memblock_alloc(size, PAGE_SIZE)); |
2babf5c2 | 131 | memcpy(p, initial_boot_params, size); |
060f78c2 | 132 | initial_boot_params = p; |
2babf5c2 ME |
133 | DBG("Moved device tree to 0x%p\n", p); |
134 | } | |
135 | ||
136 | DBG("<- move_device_tree\n"); | |
137 | } | |
9b6b563c | 138 | |
d205819e PM |
139 | /* |
140 | * ibm,pa-features is a per-cpu property that contains a string of | |
141 | * attribute descriptors, each of which has a 2 byte header plus up | |
142 | * to 254 bytes worth of processor attribute bits. First header | |
143 | * byte specifies the number of bytes following the header. | |
144 | * Second header byte is an "attribute-specifier" type, of which | |
145 | * zero is the only currently-defined value. | |
146 | * Implementation: Pass in the byte and bit offset for the feature | |
147 | * that we are interested in. The function will return -1 if the | |
148 | * pa-features property is missing, or a 1/0 to indicate if the feature | |
149 | * is supported/not supported. Note that the bit numbers are | |
150 | * big-endian to match the definition in PAPR. | |
151 | */ | |
152 | static struct ibm_pa_feature { | |
153 | unsigned long cpu_features; /* CPU_FTR_xxx bit */ | |
44ae3ab3 | 154 | unsigned long mmu_features; /* MMU_FTR_xxx bit */ |
d205819e | 155 | unsigned int cpu_user_ftrs; /* PPC_FEATURE_xxx bit */ |
beff8237 | 156 | unsigned int cpu_user_ftrs2; /* PPC_FEATURE2_xxx bit */ |
d205819e PM |
157 | unsigned char pabyte; /* byte number in ibm,pa-features */ |
158 | unsigned char pabit; /* bit number (big-endian) */ | |
159 | unsigned char invert; /* if 1, pa bit set => clear feature */ | |
160 | } ibm_pa_features[] __initdata = { | |
e9eb0278 ME |
161 | { .pabyte = 0, .pabit = 0, .cpu_user_ftrs = PPC_FEATURE_HAS_MMU }, |
162 | { .pabyte = 0, .pabit = 1, .cpu_user_ftrs = PPC_FEATURE_HAS_FPU }, | |
163 | { .pabyte = 0, .pabit = 3, .cpu_features = CPU_FTR_CTRL }, | |
164 | { .pabyte = 0, .pabit = 6, .cpu_features = CPU_FTR_NOEXECUTE }, | |
165 | { .pabyte = 1, .pabit = 2, .mmu_features = MMU_FTR_CI_LARGE_PAGE }, | |
d957fb4d | 166 | #ifdef CONFIG_PPC_RADIX_MMU |
e9eb0278 | 167 | { .pabyte = 40, .pabit = 0, .mmu_features = MMU_FTR_TYPE_RADIX }, |
d957fb4d | 168 | #endif |
e9eb0278 ME |
169 | { .pabyte = 1, .pabit = 1, .invert = 1, .cpu_features = CPU_FTR_NODSISRALIGN }, |
170 | { .pabyte = 5, .pabit = 0, .cpu_features = CPU_FTR_REAL_LE, | |
171 | .cpu_user_ftrs = PPC_FEATURE_TRUE_LE }, | |
9e819963 | 172 | /* |
4705e024 AB |
173 | * If the kernel doesn't support TM (ie CONFIG_PPC_TRANSACTIONAL_MEM=n), |
174 | * we don't want to turn on TM here, so we use the *_COMP versions | |
175 | * which are 0 if the kernel doesn't support TM. | |
9e819963 | 176 | */ |
e9eb0278 ME |
177 | { .pabyte = 22, .pabit = 0, .cpu_features = CPU_FTR_TM_COMP, |
178 | .cpu_user_ftrs2 = PPC_FEATURE2_HTM_COMP | PPC_FEATURE2_HTM_NOSC_COMP }, | |
d205819e PM |
179 | }; |
180 | ||
9d0c4dfe | 181 | static void __init scan_features(unsigned long node, const unsigned char *ftrs, |
974a76f5 PM |
182 | unsigned long tablelen, |
183 | struct ibm_pa_feature *fp, | |
184 | unsigned long ft_size) | |
d205819e | 185 | { |
974a76f5 | 186 | unsigned long i, len, bit; |
d205819e PM |
187 | |
188 | /* find descriptor with type == 0 */ | |
189 | for (;;) { | |
190 | if (tablelen < 3) | |
191 | return; | |
974a76f5 | 192 | len = 2 + ftrs[0]; |
d205819e PM |
193 | if (tablelen < len) |
194 | return; /* descriptor 0 not found */ | |
974a76f5 | 195 | if (ftrs[1] == 0) |
d205819e PM |
196 | break; |
197 | tablelen -= len; | |
974a76f5 | 198 | ftrs += len; |
d205819e PM |
199 | } |
200 | ||
201 | /* loop over bits we know about */ | |
974a76f5 PM |
202 | for (i = 0; i < ft_size; ++i, ++fp) { |
203 | if (fp->pabyte >= ftrs[0]) | |
d205819e | 204 | continue; |
974a76f5 | 205 | bit = (ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1; |
d205819e PM |
206 | if (bit ^ fp->invert) { |
207 | cur_cpu_spec->cpu_features |= fp->cpu_features; | |
208 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs; | |
beff8237 | 209 | cur_cpu_spec->cpu_user_features2 |= fp->cpu_user_ftrs2; |
44ae3ab3 | 210 | cur_cpu_spec->mmu_features |= fp->mmu_features; |
d205819e PM |
211 | } else { |
212 | cur_cpu_spec->cpu_features &= ~fp->cpu_features; | |
213 | cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs; | |
beff8237 | 214 | cur_cpu_spec->cpu_user_features2 &= ~fp->cpu_user_ftrs2; |
44ae3ab3 | 215 | cur_cpu_spec->mmu_features &= ~fp->mmu_features; |
d205819e PM |
216 | } |
217 | } | |
218 | } | |
219 | ||
974a76f5 PM |
220 | static void __init check_cpu_pa_features(unsigned long node) |
221 | { | |
9d0c4dfe RH |
222 | const unsigned char *pa_ftrs; |
223 | int tablelen; | |
974a76f5 PM |
224 | |
225 | pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen); | |
226 | if (pa_ftrs == NULL) | |
227 | return; | |
228 | ||
229 | scan_features(node, pa_ftrs, tablelen, | |
230 | ibm_pa_features, ARRAY_SIZE(ibm_pa_features)); | |
231 | } | |
232 | ||
4e003747 | 233 | #ifdef CONFIG_PPC_BOOK3S_64 |
9c61f7a0 | 234 | static void __init init_mmu_slb_size(unsigned long node) |
584f8b71 | 235 | { |
9d0c4dfe | 236 | const __be32 *slb_size_ptr; |
584f8b71 | 237 | |
9c61f7a0 AK |
238 | slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL) ? : |
239 | of_get_flat_dt_prop(node, "ibm,slb-size", NULL); | |
240 | ||
241 | if (slb_size_ptr) | |
dc0e643a | 242 | mmu_slb_size = be32_to_cpup(slb_size_ptr); |
584f8b71 MN |
243 | } |
244 | #else | |
9c61f7a0 | 245 | #define init_mmu_slb_size(node) do { } while(0) |
584f8b71 MN |
246 | #endif |
247 | ||
974a76f5 PM |
248 | static struct feature_property { |
249 | const char *name; | |
250 | u32 min_value; | |
251 | unsigned long cpu_feature; | |
252 | unsigned long cpu_user_ftr; | |
253 | } feature_properties[] __initdata = { | |
254 | #ifdef CONFIG_ALTIVEC | |
255 | {"altivec", 0, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
256 | {"ibm,vmx", 1, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
257 | #endif /* CONFIG_ALTIVEC */ | |
b962ce9d MN |
258 | #ifdef CONFIG_VSX |
259 | /* Yes, this _really_ is ibm,vmx == 2 to enable VSX */ | |
260 | {"ibm,vmx", 2, CPU_FTR_VSX, PPC_FEATURE_HAS_VSX}, | |
261 | #endif /* CONFIG_VSX */ | |
974a76f5 PM |
262 | #ifdef CONFIG_PPC64 |
263 | {"ibm,dfp", 1, 0, PPC_FEATURE_HAS_DFP}, | |
264 | {"ibm,purr", 1, CPU_FTR_PURR, 0}, | |
265 | {"ibm,spurr", 1, CPU_FTR_SPURR, 0}, | |
266 | #endif /* CONFIG_PPC64 */ | |
267 | }; | |
268 | ||
14b3d926 VB |
269 | #if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU) |
270 | static inline void identical_pvr_fixup(unsigned long node) | |
271 | { | |
272 | unsigned int pvr; | |
9d0c4dfe | 273 | const char *model = of_get_flat_dt_prop(node, "model", NULL); |
14b3d926 VB |
274 | |
275 | /* | |
276 | * Since 440GR(x)/440EP(x) processors have the same pvr, | |
277 | * we check the node path and set bit 28 in the cur_cpu_spec | |
278 | * pvr for EP(x) processor version. This bit is always 0 in | |
279 | * the "real" pvr. Then we call identify_cpu again with | |
280 | * the new logical pvr to enable FPU support. | |
281 | */ | |
282 | if (model && strstr(model, "440EP")) { | |
283 | pvr = cur_cpu_spec->pvr_value | 0x8; | |
284 | identify_cpu(0, pvr); | |
285 | DBG("Using logical pvr %x for %s\n", pvr, model); | |
286 | } | |
287 | } | |
288 | #else | |
289 | #define identical_pvr_fixup(node) do { } while(0) | |
290 | #endif | |
291 | ||
974a76f5 PM |
292 | static void __init check_cpu_feature_properties(unsigned long node) |
293 | { | |
294 | unsigned long i; | |
295 | struct feature_property *fp = feature_properties; | |
dc0e643a | 296 | const __be32 *prop; |
974a76f5 PM |
297 | |
298 | for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) { | |
299 | prop = of_get_flat_dt_prop(node, fp->name, NULL); | |
dc0e643a | 300 | if (prop && be32_to_cpup(prop) >= fp->min_value) { |
974a76f5 PM |
301 | cur_cpu_spec->cpu_features |= fp->cpu_feature; |
302 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr; | |
303 | } | |
304 | } | |
305 | } | |
306 | ||
9b6b563c | 307 | static int __init early_init_dt_scan_cpus(unsigned long node, |
4df20460 AB |
308 | const char *uname, int depth, |
309 | void *data) | |
9b6b563c | 310 | { |
9d0c4dfe | 311 | const char *type = of_get_flat_dt_prop(node, "device_type", NULL); |
dc0e643a IM |
312 | const __be32 *prop; |
313 | const __be32 *intserv; | |
4df20460 | 314 | int i, nthreads; |
9d0c4dfe | 315 | int len; |
9d07bc84 | 316 | int found = -1; |
208b3a4c | 317 | int found_thread = 0; |
9b6b563c PM |
318 | |
319 | /* We are scanning "cpu" nodes only */ | |
320 | if (type == NULL || strcmp(type, "cpu") != 0) | |
321 | return 0; | |
322 | ||
4df20460 AB |
323 | /* Get physical cpuid */ |
324 | intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len); | |
e16c8765 AF |
325 | if (!intserv) |
326 | intserv = of_get_flat_dt_prop(node, "reg", &len); | |
327 | ||
328 | nthreads = len / sizeof(int); | |
4df20460 AB |
329 | |
330 | /* | |
331 | * Now see if any of these threads match our boot cpu. | |
332 | * NOTE: This must match the parsing done in smp_setup_cpu_maps. | |
333 | */ | |
334 | for (i = 0; i < nthreads; i++) { | |
335 | /* | |
336 | * version 2 of the kexec param format adds the phys cpuid of | |
337 | * booted proc. | |
338 | */ | |
060f78c2 | 339 | if (fdt_version(initial_boot_params) >= 2) { |
dc0e643a | 340 | if (be32_to_cpu(intserv[i]) == |
060f78c2 | 341 | fdt_boot_cpuid_phys(initial_boot_params)) { |
9d07bc84 | 342 | found = boot_cpu_count; |
208b3a4c BH |
343 | found_thread = i; |
344 | } | |
4df20460 AB |
345 | } else { |
346 | /* | |
347 | * Check if it's the boot-cpu, set it's hw index now, | |
348 | * unfortunately this format did not support booting | |
349 | * off secondary threads. | |
350 | */ | |
351 | if (of_get_flat_dt_prop(node, | |
9d07bc84 BH |
352 | "linux,boot-cpu", NULL) != NULL) |
353 | found = boot_cpu_count; | |
9b6b563c | 354 | } |
4df20460 AB |
355 | #ifdef CONFIG_SMP |
356 | /* logical cpu id is always 0 on UP kernels */ | |
9d07bc84 | 357 | boot_cpu_count++; |
4df20460 AB |
358 | #endif |
359 | } | |
360 | ||
7222f779 BH |
361 | /* Not the boot CPU */ |
362 | if (found < 0) | |
363 | return 0; | |
9b6b563c | 364 | |
7222f779 BH |
365 | DBG("boot cpu: logical %d physical %d\n", found, |
366 | be32_to_cpu(intserv[found_thread])); | |
367 | boot_cpuid = found; | |
14b3d926 | 368 | |
7222f779 BH |
369 | /* |
370 | * PAPR defines "logical" PVR values for cpus that | |
371 | * meet various levels of the architecture: | |
372 | * 0x0f000001 Architecture version 2.04 | |
373 | * 0x0f000002 Architecture version 2.05 | |
374 | * If the cpu-version property in the cpu node contains | |
375 | * such a value, we call identify_cpu again with the | |
376 | * logical PVR value in order to use the cpu feature | |
377 | * bits appropriate for the architecture level. | |
378 | * | |
379 | * A POWER6 partition in "POWER6 architected" mode | |
380 | * uses the 0x0f000002 PVR value; in POWER5+ mode | |
381 | * it uses 0x0f000001. | |
5a61ef74 NP |
382 | * |
383 | * If we're using device tree CPU feature discovery then we don't | |
384 | * support the cpu-version property, and it's the responsibility of the | |
385 | * firmware/hypervisor to provide the correct feature set for the | |
386 | * architecture level via the ibm,powerpc-cpu-features binding. | |
7222f779 | 387 | */ |
5a61ef74 NP |
388 | if (!dt_cpu_ftrs_in_use()) { |
389 | prop = of_get_flat_dt_prop(node, "cpu-version", NULL); | |
390 | if (prop && (be32_to_cpup(prop) & 0xff000000) == 0x0f000000) | |
391 | identify_cpu(0, be32_to_cpup(prop)); | |
7222f779 | 392 | |
5a61ef74 NP |
393 | check_cpu_feature_properties(node); |
394 | check_cpu_pa_features(node); | |
395 | } | |
9b6b563c | 396 | |
5a61ef74 | 397 | identical_pvr_fixup(node); |
9c61f7a0 | 398 | init_mmu_slb_size(node); |
d205819e | 399 | |
4a85b31d | 400 | #ifdef CONFIG_PPC64 |
5a61ef74 | 401 | if (nthreads == 1) |
4df20460 | 402 | cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT; |
5a61ef74 NP |
403 | else if (!dt_cpu_ftrs_in_use()) |
404 | cur_cpu_spec->cpu_features |= CPU_FTR_SMT; | |
59f57774 | 405 | allocate_paca(boot_cpuid); |
9b6b563c | 406 | #endif |
59f57774 | 407 | set_hard_smp_processor_id(found, be32_to_cpu(intserv[found_thread])); |
5a61ef74 | 408 | |
9b6b563c PM |
409 | return 0; |
410 | } | |
411 | ||
e51df2c1 AB |
412 | static int __init early_init_dt_scan_chosen_ppc(unsigned long node, |
413 | const char *uname, | |
414 | int depth, void *data) | |
9b6b563c | 415 | { |
9d0c4dfe | 416 | const unsigned long *lprop; /* All these set by kernel, so no need to convert endian */ |
9b6b563c | 417 | |
32c97689 GL |
418 | /* Use common scan routine to determine if this is the chosen node */ |
419 | if (early_init_dt_scan_chosen(node, uname, depth, data) == 0) | |
420 | return 0; | |
421 | ||
9b6b563c PM |
422 | #ifdef CONFIG_PPC64 |
423 | /* check if iommu is forced on or off */ | |
3c726f8d | 424 | if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL) |
9b6b563c | 425 | iommu_is_off = 1; |
3c726f8d | 426 | if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL) |
9b6b563c PM |
427 | iommu_force_on = 1; |
428 | #endif | |
429 | ||
2babf5c2 | 430 | /* mem=x on the command line is the preferred mechanism */ |
86e03221 GL |
431 | lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL); |
432 | if (lprop) | |
433 | memory_limit = *lprop; | |
9b6b563c PM |
434 | |
435 | #ifdef CONFIG_PPC64 | |
86e03221 GL |
436 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL); |
437 | if (lprop) | |
438 | tce_alloc_start = *lprop; | |
439 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL); | |
440 | if (lprop) | |
441 | tce_alloc_end = *lprop; | |
9b6b563c PM |
442 | #endif |
443 | ||
da665885 | 444 | #ifdef CONFIG_KEXEC_CORE |
63277161 | 445 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL); |
70c6cc37 LV |
446 | if (lprop) |
447 | crashk_res.start = *lprop; | |
dcee3036 | 448 | |
63277161 | 449 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL); |
70c6cc37 LV |
450 | if (lprop) |
451 | crashk_res.end = crashk_res.start + *lprop - 1; | |
dcee3036 | 452 | #endif |
32c97689 GL |
453 | |
454 | /* break now */ | |
455 | return 1; | |
9b6b563c PM |
456 | } |
457 | ||
0204568a PM |
458 | #ifdef CONFIG_PPC_PSERIES |
459 | /* | |
6c6ea537 | 460 | * Interpret the ibm dynamic reconfiguration memory LMBs. |
0204568a PM |
461 | * This contains a list of memory blocks along with NUMA affinity |
462 | * information. | |
463 | */ | |
6c6ea537 NF |
464 | static void __init early_init_drmem_lmb(struct drmem_lmb *lmb, |
465 | const __be32 **usm) | |
0204568a | 466 | { |
6c6ea537 NF |
467 | u64 base, size; |
468 | int is_kexec_kdump = 0, rngs; | |
0204568a | 469 | |
6c6ea537 NF |
470 | base = lmb->base_addr; |
471 | size = drmem_lmb_size(); | |
472 | rngs = 1; | |
0204568a | 473 | |
6c6ea537 NF |
474 | /* |
475 | * Skip this block if the reserved bit is set in flags | |
476 | * or if the block is not assigned to this partition. | |
477 | */ | |
478 | if ((lmb->flags & DRCONF_MEM_RESERVED) || | |
479 | !(lmb->flags & DRCONF_MEM_ASSIGNED)) | |
480 | return; | |
0204568a | 481 | |
6c6ea537 | 482 | if (*usm) |
cf00085d C |
483 | is_kexec_kdump = 1; |
484 | ||
6c6ea537 NF |
485 | if (is_kexec_kdump) { |
486 | /* | |
487 | * For each memblock in ibm,dynamic-memory, a | |
488 | * corresponding entry in linux,drconf-usable-memory | |
489 | * property contains a counter 'p' followed by 'p' | |
490 | * (base, size) duple. Now read the counter from | |
491 | * linux,drconf-usable-memory property | |
492 | */ | |
493 | rngs = dt_mem_next_cell(dt_root_size_cells, usm); | |
494 | if (!rngs) /* there are no (base, size) duple */ | |
495 | return; | |
496 | } | |
497 | ||
498 | do { | |
cf00085d | 499 | if (is_kexec_kdump) { |
6c6ea537 NF |
500 | base = dt_mem_next_cell(dt_root_addr_cells, usm); |
501 | size = dt_mem_next_cell(dt_root_size_cells, usm); | |
502 | } | |
503 | ||
504 | if (iommu_is_off) { | |
505 | if (base >= 0x80000000ul) | |
0204568a | 506 | continue; |
6c6ea537 NF |
507 | if ((base + size) > 0x80000000ul) |
508 | size = 0x80000000ul - base; | |
0204568a | 509 | } |
6c6ea537 NF |
510 | |
511 | DBG("Adding: %llx -> %llx\n", base, size); | |
512 | memblock_add(base, size); | |
513 | } while (--rngs); | |
0204568a | 514 | } |
0204568a | 515 | #endif /* CONFIG_PPC_PSERIES */ |
9b6b563c | 516 | |
51975db0 GL |
517 | static int __init early_init_dt_scan_memory_ppc(unsigned long node, |
518 | const char *uname, | |
519 | int depth, void *data) | |
9b6b563c | 520 | { |
6c6ea537 | 521 | #ifdef CONFIG_PPC_PSERIES |
0204568a | 522 | if (depth == 1 && |
6c6ea537 NF |
523 | strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0) { |
524 | walk_drmem_lmbs_early(node, early_init_drmem_lmb); | |
525 | return 0; | |
526 | } | |
527 | #endif | |
51975db0 GL |
528 | |
529 | return early_init_dt_scan_memory(node, uname, depth, data); | |
530 | } | |
0204568a | 531 | |
b27652dd KH |
532 | /* |
533 | * For a relocatable kernel, we need to get the memstart_addr first, | |
534 | * then use it to calculate the virtual kernel start address. This has | |
535 | * to happen at a very early stage (before machine_init). In this case, | |
536 | * we just want to get the memstart_address and would not like to mess the | |
537 | * memblock at this stage. So introduce a variable to skip the memblock_add() | |
538 | * for this reason. | |
539 | */ | |
540 | #ifdef CONFIG_RELOCATABLE | |
541 | static int add_mem_to_memblock = 1; | |
542 | #else | |
543 | #define add_mem_to_memblock 1 | |
544 | #endif | |
545 | ||
51975db0 GL |
546 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) |
547 | { | |
cd3db0c4 | 548 | #ifdef CONFIG_PPC64 |
51975db0 GL |
549 | if (iommu_is_off) { |
550 | if (base >= 0x80000000ul) | |
551 | return; | |
552 | if ((base + size) > 0x80000000ul) | |
553 | size = 0x80000000ul - base; | |
554 | } | |
9b6b563c | 555 | #endif |
03bf469a BH |
556 | /* Keep track of the beginning of memory -and- the size of |
557 | * the very first block in the device-tree as it represents | |
558 | * the RMA on ppc64 server | |
559 | */ | |
560 | if (base < memstart_addr) { | |
561 | memstart_addr = base; | |
562 | first_memblock_size = size; | |
563 | } | |
cd3db0c4 BH |
564 | |
565 | /* Add the chunk to the MEMBLOCK list */ | |
b27652dd KH |
566 | if (add_mem_to_memblock) |
567 | memblock_add(base, size); | |
9b6b563c PM |
568 | } |
569 | ||
c039e3a8 | 570 | static void __init early_reserve_mem_dt(void) |
0962e800 | 571 | { |
9d0c4dfe RH |
572 | unsigned long i, dt_root; |
573 | int len; | |
0962e800 JK |
574 | const __be32 *prop; |
575 | ||
24bbd929 | 576 | early_init_fdt_reserve_self(); |
edba274c RH |
577 | early_init_fdt_scan_reserved_mem(); |
578 | ||
0962e800 JK |
579 | dt_root = of_get_flat_dt_root(); |
580 | ||
581 | prop = of_get_flat_dt_prop(dt_root, "reserved-ranges", &len); | |
582 | ||
583 | if (!prop) | |
c039e3a8 BH |
584 | return; |
585 | ||
586 | DBG("Found new-style reserved-ranges\n"); | |
0962e800 JK |
587 | |
588 | /* Each reserved range is an (address,size) pair, 2 cells each, | |
589 | * totalling 4 cells per range. */ | |
590 | for (i = 0; i < len / (sizeof(*prop) * 4); i++) { | |
591 | u64 base, size; | |
592 | ||
593 | base = of_read_number(prop + (i * 4) + 0, 2); | |
594 | size = of_read_number(prop + (i * 4) + 2, 2); | |
595 | ||
c039e3a8 BH |
596 | if (size) { |
597 | DBG("reserving: %llx -> %llx\n", base, size); | |
0962e800 | 598 | memblock_reserve(base, size); |
c039e3a8 | 599 | } |
0962e800 | 600 | } |
0962e800 JK |
601 | } |
602 | ||
9b6b563c PM |
603 | static void __init early_reserve_mem(void) |
604 | { | |
dc0e643a | 605 | __be64 *reserve_map; |
9b6b563c | 606 | |
dc0e643a | 607 | reserve_map = (__be64 *)(((unsigned long)initial_boot_params) + |
060f78c2 | 608 | fdt_off_mem_rsvmap(initial_boot_params)); |
4d1f3f25 | 609 | |
c039e3a8 BH |
610 | /* Look for the new "reserved-regions" property in the DT */ |
611 | early_reserve_mem_dt(); | |
0962e800 | 612 | |
30437b3e | 613 | #ifdef CONFIG_BLK_DEV_INITRD |
c039e3a8 BH |
614 | /* Then reserve the initrd, if any */ |
615 | if (initrd_start && (initrd_end > initrd_start)) { | |
307cfe71 BH |
616 | memblock_reserve(_ALIGN_DOWN(__pa(initrd_start), PAGE_SIZE), |
617 | _ALIGN_UP(initrd_end, PAGE_SIZE) - | |
618 | _ALIGN_DOWN(initrd_start, PAGE_SIZE)); | |
c039e3a8 | 619 | } |
30437b3e DG |
620 | #endif /* CONFIG_BLK_DEV_INITRD */ |
621 | ||
cbbcf340 KG |
622 | #ifdef CONFIG_PPC32 |
623 | /* | |
624 | * Handle the case where we might be booting from an old kexec | |
625 | * image that setup the mem_rsvmap as pairs of 32-bit values | |
626 | */ | |
dc0e643a | 627 | if (be64_to_cpup(reserve_map) > 0xffffffffull) { |
cbbcf340 | 628 | u32 base_32, size_32; |
dc0e643a | 629 | __be32 *reserve_map_32 = (__be32 *)reserve_map; |
cbbcf340 | 630 | |
c039e3a8 BH |
631 | DBG("Found old 32-bit reserve map\n"); |
632 | ||
cbbcf340 | 633 | while (1) { |
dc0e643a IM |
634 | base_32 = be32_to_cpup(reserve_map_32++); |
635 | size_32 = be32_to_cpup(reserve_map_32++); | |
cbbcf340 KG |
636 | if (size_32 == 0) |
637 | break; | |
329dda08 | 638 | DBG("reserving: %x -> %x\n", base_32, size_32); |
95f72d1e | 639 | memblock_reserve(base_32, size_32); |
cbbcf340 KG |
640 | } |
641 | return; | |
642 | } | |
643 | #endif | |
9b6b563c PM |
644 | } |
645 | ||
07fd1761 CB |
646 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
647 | static bool tm_disabled __initdata; | |
648 | ||
649 | static int __init parse_ppc_tm(char *str) | |
650 | { | |
651 | bool res; | |
652 | ||
653 | if (kstrtobool(str, &res)) | |
654 | return -EINVAL; | |
655 | ||
656 | tm_disabled = !res; | |
657 | ||
658 | return 0; | |
659 | } | |
660 | early_param("ppc_tm", parse_ppc_tm); | |
661 | ||
662 | static void __init tm_init(void) | |
663 | { | |
664 | if (tm_disabled) { | |
665 | pr_info("Disabling hardware transactional memory (HTM)\n"); | |
666 | cur_cpu_spec->cpu_user_features2 &= | |
667 | ~(PPC_FEATURE2_HTM_NOSC | PPC_FEATURE2_HTM); | |
668 | cur_cpu_spec->cpu_features &= ~CPU_FTR_TM; | |
54820530 | 669 | return; |
07fd1761 | 670 | } |
54820530 ME |
671 | |
672 | pnv_tm_init(); | |
07fd1761 CB |
673 | } |
674 | #else | |
675 | static void tm_init(void) { } | |
676 | #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ | |
677 | ||
9b6b563c PM |
678 | void __init early_init_devtree(void *params) |
679 | { | |
49a84965 | 680 | phys_addr_t limit; |
6ca4f749 | 681 | |
44348105 | 682 | DBG(" -> early_init_devtree(%p)\n", params); |
9b6b563c | 683 | |
ad72a279 ME |
684 | /* Too early to BUG_ON(), do it by hand */ |
685 | if (!early_init_dt_verify(params)) | |
686 | panic("BUG: Failed verifying flat device tree, bad version?"); | |
687 | ||
458148c0 ME |
688 | #ifdef CONFIG_PPC_RTAS |
689 | /* Some machines might need RTAS info for debugging, grab it now. */ | |
690 | of_scan_flat_dt(early_init_dt_scan_rtas, NULL); | |
691 | #endif | |
692 | ||
14a43e69 BH |
693 | #ifdef CONFIG_PPC_POWERNV |
694 | /* Some machines might need OPAL info for debugging, grab it now. */ | |
695 | of_scan_flat_dt(early_init_dt_scan_opal, NULL); | |
696 | #endif | |
697 | ||
eb39c880 MS |
698 | #ifdef CONFIG_FA_DUMP |
699 | /* scan tree to see if dump is active during last boot */ | |
700 | of_scan_flat_dt(early_init_dt_scan_fw_dump, NULL); | |
701 | #endif | |
702 | ||
9b6b563c PM |
703 | /* Retrieve various informations from the /chosen node of the |
704 | * device-tree, including the platform type, initrd location and | |
705 | * size, TCE reserve, and more ... | |
706 | */ | |
3e47d147 | 707 | of_scan_flat_dt(early_init_dt_scan_chosen_ppc, boot_command_line); |
9b6b563c | 708 | |
95f72d1e | 709 | /* Scan memory nodes and rebuild MEMBLOCKs */ |
3c726f8d | 710 | of_scan_flat_dt(early_init_dt_scan_root, NULL); |
51975db0 | 711 | of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); |
846f77b0 | 712 | |
846f77b0 ME |
713 | parse_early_param(); |
714 | ||
ba14f649 KG |
715 | /* make sure we've parsed cmdline for mem= before this */ |
716 | if (memory_limit) | |
a84fcd46 | 717 | first_memblock_size = min_t(u64, first_memblock_size, memory_limit); |
ba14f649 | 718 | setup_initial_memory_limit(memstart_addr, first_memblock_size); |
95f72d1e YL |
719 | /* Reserve MEMBLOCK regions used by kernel, initrd, dt, etc... */ |
720 | memblock_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); | |
549e8152 PM |
721 | /* If relocatable, reserve first 32k for interrupt vectors etc. */ |
722 | if (PHYSICAL_START > MEMORY_START) | |
95f72d1e | 723 | memblock_reserve(MEMORY_START, 0x8000); |
47310413 | 724 | reserve_kdump_trampoline(); |
eb39c880 MS |
725 | #ifdef CONFIG_FA_DUMP |
726 | /* | |
727 | * If we fail to reserve memory for firmware-assisted dump then | |
728 | * fallback to kexec based kdump. | |
729 | */ | |
730 | if (fadump_reserve_mem() == 0) | |
731 | #endif | |
732 | reserve_crashkernel(); | |
9b6b563c PM |
733 | early_reserve_mem(); |
734 | ||
14ed7409 | 735 | /* Ensure that total memory size is page-aligned. */ |
6fbef13c | 736 | limit = ALIGN(memory_limit ?: memblock_phys_mem_size(), PAGE_SIZE); |
95f72d1e | 737 | memblock_enforce_memory_limit(limit); |
6ca4f749 | 738 | |
1aadc056 | 739 | memblock_allow_resize(); |
95f72d1e | 740 | memblock_dump_all(); |
2babf5c2 | 741 | |
95f72d1e | 742 | DBG("Phys. mem: %llx\n", memblock_phys_mem_size()); |
2babf5c2 ME |
743 | |
744 | /* We may need to relocate the flat tree, do it now. | |
745 | * FIXME .. and the initrd too? */ | |
746 | move_device_tree(); | |
747 | ||
59f57774 | 748 | allocate_paca_ptrs(); |
1426d5a3 | 749 | |
9b6b563c PM |
750 | DBG("Scanning CPUs ...\n"); |
751 | ||
5a61ef74 NP |
752 | dt_cpu_ftrs_scan(); |
753 | ||
25985edc | 754 | /* Retrieve CPU related informations from the flat tree |
3c726f8d | 755 | * (altivec support, boot CPU ID, ...) |
9b6b563c | 756 | */ |
3c726f8d | 757 | of_scan_flat_dt(early_init_dt_scan_cpus, NULL); |
36ae37e3 | 758 | if (boot_cpuid < 0) { |
d939be3a | 759 | printk("Failed to identify boot CPU !\n"); |
36ae37e3 BH |
760 | BUG(); |
761 | } | |
9b6b563c | 762 | |
7ac87abb ME |
763 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC64) |
764 | /* We'll later wait for secondaries to check in; there are | |
765 | * NCPUS-1 non-boot CPUs :-) | |
766 | */ | |
767 | spinning_secondaries = boot_cpu_count - 1; | |
768 | #endif | |
769 | ||
1a01dc87 ME |
770 | mmu_early_init_devtree(); |
771 | ||
55672ecf MS |
772 | #ifdef CONFIG_PPC_POWERNV |
773 | /* Scan and build the list of machine check recoverable ranges */ | |
774 | of_scan_flat_dt(early_init_dt_scan_recoverable_ranges, NULL); | |
775 | #endif | |
da6a97bf | 776 | epapr_paravirt_early_init(); |
55672ecf | 777 | |
3808a889 BH |
778 | /* Now try to figure out if we are running on LPAR and so on */ |
779 | pseries_probe_fw_features(); | |
780 | ||
166dd7d3 BH |
781 | #ifdef CONFIG_PPC_PS3 |
782 | /* Identify PS3 firmware */ | |
783 | if (of_flat_dt_is_compatible(of_get_flat_dt_root(), "sony,ps3")) | |
784 | powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE; | |
785 | #endif | |
786 | ||
07fd1761 CB |
787 | tm_init(); |
788 | ||
9b6b563c PM |
789 | DBG(" <- early_init_devtree()\n"); |
790 | } | |
791 | ||
b27652dd KH |
792 | #ifdef CONFIG_RELOCATABLE |
793 | /* | |
794 | * This function run before early_init_devtree, so we have to init | |
795 | * initial_boot_params. | |
796 | */ | |
797 | void __init early_get_first_memblock_info(void *params, phys_addr_t *size) | |
798 | { | |
799 | /* Setup flat device-tree pointer */ | |
800 | initial_boot_params = params; | |
801 | ||
802 | /* | |
803 | * Scan the memory nodes and set add_mem_to_memblock to 0 to avoid | |
804 | * mess the memblock. | |
805 | */ | |
806 | add_mem_to_memblock = 0; | |
807 | of_scan_flat_dt(early_init_dt_scan_root, NULL); | |
808 | of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); | |
809 | add_mem_to_memblock = 1; | |
810 | ||
811 | if (size) | |
812 | *size = first_memblock_size; | |
813 | } | |
814 | #endif | |
815 | ||
9b6b563c PM |
816 | /******* |
817 | * | |
818 | * New implementation of the OF "find" APIs, return a refcounted | |
819 | * object, call of_node_put() when done. The device tree and list | |
820 | * are protected by a rw_lock. | |
821 | * | |
822 | * Note that property management will need some locking as well, | |
823 | * this isn't dealt with yet. | |
824 | * | |
825 | *******/ | |
826 | ||
b37193b7 BH |
827 | /** |
828 | * of_get_ibm_chip_id - Returns the IBM "chip-id" of a device | |
829 | * @np: device node of the device | |
830 | * | |
831 | * This looks for a property "ibm,chip-id" in the node or any | |
832 | * of its parents and returns its content, or -1 if it cannot | |
833 | * be found. | |
834 | */ | |
835 | int of_get_ibm_chip_id(struct device_node *np) | |
836 | { | |
837 | of_node_get(np); | |
1856f50c | 838 | while (np) { |
1856f50c | 839 | u32 chip_id; |
b37193b7 | 840 | |
1856f50c CJ |
841 | /* |
842 | * Skiboot may produce memory nodes that contain more than one | |
843 | * cell in chip-id, we only read the first one here. | |
844 | */ | |
845 | if (!of_property_read_u32(np, "ibm,chip-id", &chip_id)) { | |
b37193b7 | 846 | of_node_put(np); |
1856f50c | 847 | return chip_id; |
b37193b7 | 848 | } |
16c1d606 ME |
849 | |
850 | np = of_get_next_parent(np); | |
b37193b7 BH |
851 | } |
852 | return -1; | |
853 | } | |
b130e7c0 | 854 | EXPORT_SYMBOL(of_get_ibm_chip_id); |
b37193b7 | 855 | |
3eb906c6 ME |
856 | /** |
857 | * cpu_to_chip_id - Return the cpus chip-id | |
858 | * @cpu: The logical cpu number. | |
859 | * | |
860 | * Return the value of the ibm,chip-id property corresponding to the given | |
861 | * logical cpu number. If the chip-id can not be found, returns -1. | |
862 | */ | |
863 | int cpu_to_chip_id(int cpu) | |
864 | { | |
865 | struct device_node *np; | |
866 | ||
867 | np = of_get_cpu_node(cpu, NULL); | |
868 | if (!np) | |
869 | return -1; | |
870 | ||
871 | of_node_put(np); | |
872 | return of_get_ibm_chip_id(np); | |
873 | } | |
874 | EXPORT_SYMBOL(cpu_to_chip_id); | |
875 | ||
819d5965 SK |
876 | bool arch_match_cpu_phys_id(int cpu, u64 phys_id) |
877 | { | |
9f593f13 NP |
878 | #ifdef CONFIG_SMP |
879 | /* | |
880 | * Early firmware scanning must use this rather than | |
881 | * get_hard_smp_processor_id because we don't have pacas allocated | |
882 | * until memory topology is discovered. | |
883 | */ | |
884 | if (cpu_to_phys_id != NULL) | |
885 | return (int)phys_id == cpu_to_phys_id[cpu]; | |
886 | #endif | |
887 | ||
819d5965 SK |
888 | return (int)phys_id == get_hard_smp_processor_id(cpu); |
889 | } |