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; | |
368 | set_hard_smp_processor_id(found, be32_to_cpu(intserv[found_thread])); | |
14b3d926 | 369 | |
7222f779 BH |
370 | /* |
371 | * PAPR defines "logical" PVR values for cpus that | |
372 | * meet various levels of the architecture: | |
373 | * 0x0f000001 Architecture version 2.04 | |
374 | * 0x0f000002 Architecture version 2.05 | |
375 | * If the cpu-version property in the cpu node contains | |
376 | * such a value, we call identify_cpu again with the | |
377 | * logical PVR value in order to use the cpu feature | |
378 | * bits appropriate for the architecture level. | |
379 | * | |
380 | * A POWER6 partition in "POWER6 architected" mode | |
381 | * uses the 0x0f000002 PVR value; in POWER5+ mode | |
382 | * it uses 0x0f000001. | |
5a61ef74 NP |
383 | * |
384 | * If we're using device tree CPU feature discovery then we don't | |
385 | * support the cpu-version property, and it's the responsibility of the | |
386 | * firmware/hypervisor to provide the correct feature set for the | |
387 | * architecture level via the ibm,powerpc-cpu-features binding. | |
7222f779 | 388 | */ |
5a61ef74 NP |
389 | if (!dt_cpu_ftrs_in_use()) { |
390 | prop = of_get_flat_dt_prop(node, "cpu-version", NULL); | |
391 | if (prop && (be32_to_cpup(prop) & 0xff000000) == 0x0f000000) | |
392 | identify_cpu(0, be32_to_cpup(prop)); | |
7222f779 | 393 | |
5a61ef74 NP |
394 | check_cpu_feature_properties(node); |
395 | check_cpu_pa_features(node); | |
396 | } | |
9b6b563c | 397 | |
5a61ef74 | 398 | identical_pvr_fixup(node); |
9c61f7a0 | 399 | init_mmu_slb_size(node); |
d205819e | 400 | |
4a85b31d | 401 | #ifdef CONFIG_PPC64 |
5a61ef74 | 402 | if (nthreads == 1) |
4df20460 | 403 | cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT; |
5a61ef74 NP |
404 | else if (!dt_cpu_ftrs_in_use()) |
405 | cur_cpu_spec->cpu_features |= CPU_FTR_SMT; | |
9b6b563c | 406 | #endif |
5a61ef74 | 407 | |
9b6b563c PM |
408 | return 0; |
409 | } | |
410 | ||
e51df2c1 AB |
411 | static int __init early_init_dt_scan_chosen_ppc(unsigned long node, |
412 | const char *uname, | |
413 | int depth, void *data) | |
9b6b563c | 414 | { |
9d0c4dfe | 415 | const unsigned long *lprop; /* All these set by kernel, so no need to convert endian */ |
9b6b563c | 416 | |
32c97689 GL |
417 | /* Use common scan routine to determine if this is the chosen node */ |
418 | if (early_init_dt_scan_chosen(node, uname, depth, data) == 0) | |
419 | return 0; | |
420 | ||
9b6b563c PM |
421 | #ifdef CONFIG_PPC64 |
422 | /* check if iommu is forced on or off */ | |
3c726f8d | 423 | if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL) |
9b6b563c | 424 | iommu_is_off = 1; |
3c726f8d | 425 | if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL) |
9b6b563c PM |
426 | iommu_force_on = 1; |
427 | #endif | |
428 | ||
2babf5c2 | 429 | /* mem=x on the command line is the preferred mechanism */ |
86e03221 GL |
430 | lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL); |
431 | if (lprop) | |
432 | memory_limit = *lprop; | |
9b6b563c PM |
433 | |
434 | #ifdef CONFIG_PPC64 | |
86e03221 GL |
435 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL); |
436 | if (lprop) | |
437 | tce_alloc_start = *lprop; | |
438 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL); | |
439 | if (lprop) | |
440 | tce_alloc_end = *lprop; | |
9b6b563c PM |
441 | #endif |
442 | ||
da665885 | 443 | #ifdef CONFIG_KEXEC_CORE |
63277161 | 444 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL); |
70c6cc37 LV |
445 | if (lprop) |
446 | crashk_res.start = *lprop; | |
dcee3036 | 447 | |
63277161 | 448 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL); |
70c6cc37 LV |
449 | if (lprop) |
450 | crashk_res.end = crashk_res.start + *lprop - 1; | |
dcee3036 | 451 | #endif |
32c97689 GL |
452 | |
453 | /* break now */ | |
454 | return 1; | |
9b6b563c PM |
455 | } |
456 | ||
0204568a PM |
457 | #ifdef CONFIG_PPC_PSERIES |
458 | /* | |
6c6ea537 | 459 | * Interpret the ibm dynamic reconfiguration memory LMBs. |
0204568a PM |
460 | * This contains a list of memory blocks along with NUMA affinity |
461 | * information. | |
462 | */ | |
6c6ea537 NF |
463 | static void __init early_init_drmem_lmb(struct drmem_lmb *lmb, |
464 | const __be32 **usm) | |
0204568a | 465 | { |
6c6ea537 NF |
466 | u64 base, size; |
467 | int is_kexec_kdump = 0, rngs; | |
0204568a | 468 | |
6c6ea537 NF |
469 | base = lmb->base_addr; |
470 | size = drmem_lmb_size(); | |
471 | rngs = 1; | |
0204568a | 472 | |
6c6ea537 NF |
473 | /* |
474 | * Skip this block if the reserved bit is set in flags | |
475 | * or if the block is not assigned to this partition. | |
476 | */ | |
477 | if ((lmb->flags & DRCONF_MEM_RESERVED) || | |
478 | !(lmb->flags & DRCONF_MEM_ASSIGNED)) | |
479 | return; | |
0204568a | 480 | |
6c6ea537 | 481 | if (*usm) |
cf00085d C |
482 | is_kexec_kdump = 1; |
483 | ||
6c6ea537 NF |
484 | if (is_kexec_kdump) { |
485 | /* | |
486 | * For each memblock in ibm,dynamic-memory, a | |
487 | * corresponding entry in linux,drconf-usable-memory | |
488 | * property contains a counter 'p' followed by 'p' | |
489 | * (base, size) duple. Now read the counter from | |
490 | * linux,drconf-usable-memory property | |
491 | */ | |
492 | rngs = dt_mem_next_cell(dt_root_size_cells, usm); | |
493 | if (!rngs) /* there are no (base, size) duple */ | |
494 | return; | |
495 | } | |
496 | ||
497 | do { | |
cf00085d | 498 | if (is_kexec_kdump) { |
6c6ea537 NF |
499 | base = dt_mem_next_cell(dt_root_addr_cells, usm); |
500 | size = dt_mem_next_cell(dt_root_size_cells, usm); | |
501 | } | |
502 | ||
503 | if (iommu_is_off) { | |
504 | if (base >= 0x80000000ul) | |
0204568a | 505 | continue; |
6c6ea537 NF |
506 | if ((base + size) > 0x80000000ul) |
507 | size = 0x80000000ul - base; | |
0204568a | 508 | } |
6c6ea537 NF |
509 | |
510 | DBG("Adding: %llx -> %llx\n", base, size); | |
511 | memblock_add(base, size); | |
512 | } while (--rngs); | |
0204568a | 513 | } |
0204568a | 514 | #endif /* CONFIG_PPC_PSERIES */ |
9b6b563c | 515 | |
51975db0 GL |
516 | static int __init early_init_dt_scan_memory_ppc(unsigned long node, |
517 | const char *uname, | |
518 | int depth, void *data) | |
9b6b563c | 519 | { |
6c6ea537 | 520 | #ifdef CONFIG_PPC_PSERIES |
0204568a | 521 | if (depth == 1 && |
6c6ea537 NF |
522 | strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0) { |
523 | walk_drmem_lmbs_early(node, early_init_drmem_lmb); | |
524 | return 0; | |
525 | } | |
526 | #endif | |
51975db0 GL |
527 | |
528 | return early_init_dt_scan_memory(node, uname, depth, data); | |
529 | } | |
0204568a | 530 | |
b27652dd KH |
531 | /* |
532 | * For a relocatable kernel, we need to get the memstart_addr first, | |
533 | * then use it to calculate the virtual kernel start address. This has | |
534 | * to happen at a very early stage (before machine_init). In this case, | |
535 | * we just want to get the memstart_address and would not like to mess the | |
536 | * memblock at this stage. So introduce a variable to skip the memblock_add() | |
537 | * for this reason. | |
538 | */ | |
539 | #ifdef CONFIG_RELOCATABLE | |
540 | static int add_mem_to_memblock = 1; | |
541 | #else | |
542 | #define add_mem_to_memblock 1 | |
543 | #endif | |
544 | ||
51975db0 GL |
545 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) |
546 | { | |
cd3db0c4 | 547 | #ifdef CONFIG_PPC64 |
51975db0 GL |
548 | if (iommu_is_off) { |
549 | if (base >= 0x80000000ul) | |
550 | return; | |
551 | if ((base + size) > 0x80000000ul) | |
552 | size = 0x80000000ul - base; | |
553 | } | |
9b6b563c | 554 | #endif |
03bf469a BH |
555 | /* Keep track of the beginning of memory -and- the size of |
556 | * the very first block in the device-tree as it represents | |
557 | * the RMA on ppc64 server | |
558 | */ | |
559 | if (base < memstart_addr) { | |
560 | memstart_addr = base; | |
561 | first_memblock_size = size; | |
562 | } | |
cd3db0c4 BH |
563 | |
564 | /* Add the chunk to the MEMBLOCK list */ | |
b27652dd KH |
565 | if (add_mem_to_memblock) |
566 | memblock_add(base, size); | |
9b6b563c PM |
567 | } |
568 | ||
c039e3a8 | 569 | static void __init early_reserve_mem_dt(void) |
0962e800 | 570 | { |
9d0c4dfe RH |
571 | unsigned long i, dt_root; |
572 | int len; | |
0962e800 JK |
573 | const __be32 *prop; |
574 | ||
24bbd929 | 575 | early_init_fdt_reserve_self(); |
edba274c RH |
576 | early_init_fdt_scan_reserved_mem(); |
577 | ||
0962e800 JK |
578 | dt_root = of_get_flat_dt_root(); |
579 | ||
580 | prop = of_get_flat_dt_prop(dt_root, "reserved-ranges", &len); | |
581 | ||
582 | if (!prop) | |
c039e3a8 BH |
583 | return; |
584 | ||
585 | DBG("Found new-style reserved-ranges\n"); | |
0962e800 JK |
586 | |
587 | /* Each reserved range is an (address,size) pair, 2 cells each, | |
588 | * totalling 4 cells per range. */ | |
589 | for (i = 0; i < len / (sizeof(*prop) * 4); i++) { | |
590 | u64 base, size; | |
591 | ||
592 | base = of_read_number(prop + (i * 4) + 0, 2); | |
593 | size = of_read_number(prop + (i * 4) + 2, 2); | |
594 | ||
c039e3a8 BH |
595 | if (size) { |
596 | DBG("reserving: %llx -> %llx\n", base, size); | |
0962e800 | 597 | memblock_reserve(base, size); |
c039e3a8 | 598 | } |
0962e800 | 599 | } |
0962e800 JK |
600 | } |
601 | ||
9b6b563c PM |
602 | static void __init early_reserve_mem(void) |
603 | { | |
dc0e643a | 604 | __be64 *reserve_map; |
9b6b563c | 605 | |
dc0e643a | 606 | reserve_map = (__be64 *)(((unsigned long)initial_boot_params) + |
060f78c2 | 607 | fdt_off_mem_rsvmap(initial_boot_params)); |
4d1f3f25 | 608 | |
c039e3a8 BH |
609 | /* Look for the new "reserved-regions" property in the DT */ |
610 | early_reserve_mem_dt(); | |
0962e800 | 611 | |
30437b3e | 612 | #ifdef CONFIG_BLK_DEV_INITRD |
c039e3a8 BH |
613 | /* Then reserve the initrd, if any */ |
614 | if (initrd_start && (initrd_end > initrd_start)) { | |
307cfe71 BH |
615 | memblock_reserve(_ALIGN_DOWN(__pa(initrd_start), PAGE_SIZE), |
616 | _ALIGN_UP(initrd_end, PAGE_SIZE) - | |
617 | _ALIGN_DOWN(initrd_start, PAGE_SIZE)); | |
c039e3a8 | 618 | } |
30437b3e DG |
619 | #endif /* CONFIG_BLK_DEV_INITRD */ |
620 | ||
cbbcf340 KG |
621 | #ifdef CONFIG_PPC32 |
622 | /* | |
623 | * Handle the case where we might be booting from an old kexec | |
624 | * image that setup the mem_rsvmap as pairs of 32-bit values | |
625 | */ | |
dc0e643a | 626 | if (be64_to_cpup(reserve_map) > 0xffffffffull) { |
cbbcf340 | 627 | u32 base_32, size_32; |
dc0e643a | 628 | __be32 *reserve_map_32 = (__be32 *)reserve_map; |
cbbcf340 | 629 | |
c039e3a8 BH |
630 | DBG("Found old 32-bit reserve map\n"); |
631 | ||
cbbcf340 | 632 | while (1) { |
dc0e643a IM |
633 | base_32 = be32_to_cpup(reserve_map_32++); |
634 | size_32 = be32_to_cpup(reserve_map_32++); | |
cbbcf340 KG |
635 | if (size_32 == 0) |
636 | break; | |
329dda08 | 637 | DBG("reserving: %x -> %x\n", base_32, size_32); |
95f72d1e | 638 | memblock_reserve(base_32, size_32); |
cbbcf340 KG |
639 | } |
640 | return; | |
641 | } | |
642 | #endif | |
9b6b563c PM |
643 | } |
644 | ||
07fd1761 CB |
645 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
646 | static bool tm_disabled __initdata; | |
647 | ||
648 | static int __init parse_ppc_tm(char *str) | |
649 | { | |
650 | bool res; | |
651 | ||
652 | if (kstrtobool(str, &res)) | |
653 | return -EINVAL; | |
654 | ||
655 | tm_disabled = !res; | |
656 | ||
657 | return 0; | |
658 | } | |
659 | early_param("ppc_tm", parse_ppc_tm); | |
660 | ||
661 | static void __init tm_init(void) | |
662 | { | |
663 | if (tm_disabled) { | |
664 | pr_info("Disabling hardware transactional memory (HTM)\n"); | |
665 | cur_cpu_spec->cpu_user_features2 &= | |
666 | ~(PPC_FEATURE2_HTM_NOSC | PPC_FEATURE2_HTM); | |
667 | cur_cpu_spec->cpu_features &= ~CPU_FTR_TM; | |
54820530 | 668 | return; |
07fd1761 | 669 | } |
54820530 ME |
670 | |
671 | pnv_tm_init(); | |
07fd1761 CB |
672 | } |
673 | #else | |
674 | static void tm_init(void) { } | |
675 | #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ | |
676 | ||
9b6b563c PM |
677 | void __init early_init_devtree(void *params) |
678 | { | |
49a84965 | 679 | phys_addr_t limit; |
6ca4f749 | 680 | |
44348105 | 681 | DBG(" -> early_init_devtree(%p)\n", params); |
9b6b563c | 682 | |
ad72a279 ME |
683 | /* Too early to BUG_ON(), do it by hand */ |
684 | if (!early_init_dt_verify(params)) | |
685 | panic("BUG: Failed verifying flat device tree, bad version?"); | |
686 | ||
458148c0 ME |
687 | #ifdef CONFIG_PPC_RTAS |
688 | /* Some machines might need RTAS info for debugging, grab it now. */ | |
689 | of_scan_flat_dt(early_init_dt_scan_rtas, NULL); | |
690 | #endif | |
691 | ||
14a43e69 BH |
692 | #ifdef CONFIG_PPC_POWERNV |
693 | /* Some machines might need OPAL info for debugging, grab it now. */ | |
694 | of_scan_flat_dt(early_init_dt_scan_opal, NULL); | |
695 | #endif | |
696 | ||
eb39c880 MS |
697 | #ifdef CONFIG_FA_DUMP |
698 | /* scan tree to see if dump is active during last boot */ | |
699 | of_scan_flat_dt(early_init_dt_scan_fw_dump, NULL); | |
700 | #endif | |
701 | ||
9b6b563c PM |
702 | /* Retrieve various informations from the /chosen node of the |
703 | * device-tree, including the platform type, initrd location and | |
704 | * size, TCE reserve, and more ... | |
705 | */ | |
3e47d147 | 706 | of_scan_flat_dt(early_init_dt_scan_chosen_ppc, boot_command_line); |
9b6b563c | 707 | |
95f72d1e | 708 | /* Scan memory nodes and rebuild MEMBLOCKs */ |
3c726f8d | 709 | of_scan_flat_dt(early_init_dt_scan_root, NULL); |
51975db0 | 710 | of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); |
846f77b0 | 711 | |
846f77b0 ME |
712 | parse_early_param(); |
713 | ||
ba14f649 KG |
714 | /* make sure we've parsed cmdline for mem= before this */ |
715 | if (memory_limit) | |
a84fcd46 | 716 | first_memblock_size = min_t(u64, first_memblock_size, memory_limit); |
ba14f649 | 717 | setup_initial_memory_limit(memstart_addr, first_memblock_size); |
95f72d1e YL |
718 | /* Reserve MEMBLOCK regions used by kernel, initrd, dt, etc... */ |
719 | memblock_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); | |
549e8152 PM |
720 | /* If relocatable, reserve first 32k for interrupt vectors etc. */ |
721 | if (PHYSICAL_START > MEMORY_START) | |
95f72d1e | 722 | memblock_reserve(MEMORY_START, 0x8000); |
47310413 | 723 | reserve_kdump_trampoline(); |
eb39c880 MS |
724 | #ifdef CONFIG_FA_DUMP |
725 | /* | |
726 | * If we fail to reserve memory for firmware-assisted dump then | |
727 | * fallback to kexec based kdump. | |
728 | */ | |
729 | if (fadump_reserve_mem() == 0) | |
730 | #endif | |
731 | reserve_crashkernel(); | |
9b6b563c PM |
732 | early_reserve_mem(); |
733 | ||
14ed7409 | 734 | /* Ensure that total memory size is page-aligned. */ |
6fbef13c | 735 | limit = ALIGN(memory_limit ?: memblock_phys_mem_size(), PAGE_SIZE); |
95f72d1e | 736 | memblock_enforce_memory_limit(limit); |
6ca4f749 | 737 | |
1aadc056 | 738 | memblock_allow_resize(); |
95f72d1e | 739 | memblock_dump_all(); |
2babf5c2 | 740 | |
95f72d1e | 741 | DBG("Phys. mem: %llx\n", memblock_phys_mem_size()); |
2babf5c2 ME |
742 | |
743 | /* We may need to relocate the flat tree, do it now. | |
744 | * FIXME .. and the initrd too? */ | |
745 | move_device_tree(); | |
746 | ||
1426d5a3 ME |
747 | allocate_pacas(); |
748 | ||
9b6b563c PM |
749 | DBG("Scanning CPUs ...\n"); |
750 | ||
5a61ef74 NP |
751 | dt_cpu_ftrs_scan(); |
752 | ||
25985edc | 753 | /* Retrieve CPU related informations from the flat tree |
3c726f8d | 754 | * (altivec support, boot CPU ID, ...) |
9b6b563c | 755 | */ |
3c726f8d | 756 | of_scan_flat_dt(early_init_dt_scan_cpus, NULL); |
36ae37e3 | 757 | if (boot_cpuid < 0) { |
d939be3a | 758 | printk("Failed to identify boot CPU !\n"); |
36ae37e3 BH |
759 | BUG(); |
760 | } | |
9b6b563c | 761 | |
7ac87abb ME |
762 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC64) |
763 | /* We'll later wait for secondaries to check in; there are | |
764 | * NCPUS-1 non-boot CPUs :-) | |
765 | */ | |
766 | spinning_secondaries = boot_cpu_count - 1; | |
767 | #endif | |
768 | ||
1a01dc87 ME |
769 | mmu_early_init_devtree(); |
770 | ||
55672ecf MS |
771 | #ifdef CONFIG_PPC_POWERNV |
772 | /* Scan and build the list of machine check recoverable ranges */ | |
773 | of_scan_flat_dt(early_init_dt_scan_recoverable_ranges, NULL); | |
774 | #endif | |
da6a97bf | 775 | epapr_paravirt_early_init(); |
55672ecf | 776 | |
3808a889 BH |
777 | /* Now try to figure out if we are running on LPAR and so on */ |
778 | pseries_probe_fw_features(); | |
779 | ||
166dd7d3 BH |
780 | #ifdef CONFIG_PPC_PS3 |
781 | /* Identify PS3 firmware */ | |
782 | if (of_flat_dt_is_compatible(of_get_flat_dt_root(), "sony,ps3")) | |
783 | powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE; | |
784 | #endif | |
785 | ||
07fd1761 CB |
786 | tm_init(); |
787 | ||
9b6b563c PM |
788 | DBG(" <- early_init_devtree()\n"); |
789 | } | |
790 | ||
b27652dd KH |
791 | #ifdef CONFIG_RELOCATABLE |
792 | /* | |
793 | * This function run before early_init_devtree, so we have to init | |
794 | * initial_boot_params. | |
795 | */ | |
796 | void __init early_get_first_memblock_info(void *params, phys_addr_t *size) | |
797 | { | |
798 | /* Setup flat device-tree pointer */ | |
799 | initial_boot_params = params; | |
800 | ||
801 | /* | |
802 | * Scan the memory nodes and set add_mem_to_memblock to 0 to avoid | |
803 | * mess the memblock. | |
804 | */ | |
805 | add_mem_to_memblock = 0; | |
806 | of_scan_flat_dt(early_init_dt_scan_root, NULL); | |
807 | of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); | |
808 | add_mem_to_memblock = 1; | |
809 | ||
810 | if (size) | |
811 | *size = first_memblock_size; | |
812 | } | |
813 | #endif | |
814 | ||
9b6b563c PM |
815 | /******* |
816 | * | |
817 | * New implementation of the OF "find" APIs, return a refcounted | |
818 | * object, call of_node_put() when done. The device tree and list | |
819 | * are protected by a rw_lock. | |
820 | * | |
821 | * Note that property management will need some locking as well, | |
822 | * this isn't dealt with yet. | |
823 | * | |
824 | *******/ | |
825 | ||
b37193b7 BH |
826 | /** |
827 | * of_get_ibm_chip_id - Returns the IBM "chip-id" of a device | |
828 | * @np: device node of the device | |
829 | * | |
830 | * This looks for a property "ibm,chip-id" in the node or any | |
831 | * of its parents and returns its content, or -1 if it cannot | |
832 | * be found. | |
833 | */ | |
834 | int of_get_ibm_chip_id(struct device_node *np) | |
835 | { | |
836 | of_node_get(np); | |
1856f50c | 837 | while (np) { |
1856f50c | 838 | u32 chip_id; |
b37193b7 | 839 | |
1856f50c CJ |
840 | /* |
841 | * Skiboot may produce memory nodes that contain more than one | |
842 | * cell in chip-id, we only read the first one here. | |
843 | */ | |
844 | if (!of_property_read_u32(np, "ibm,chip-id", &chip_id)) { | |
b37193b7 | 845 | of_node_put(np); |
1856f50c | 846 | return chip_id; |
b37193b7 | 847 | } |
16c1d606 ME |
848 | |
849 | np = of_get_next_parent(np); | |
b37193b7 BH |
850 | } |
851 | return -1; | |
852 | } | |
b130e7c0 | 853 | EXPORT_SYMBOL(of_get_ibm_chip_id); |
b37193b7 | 854 | |
3eb906c6 ME |
855 | /** |
856 | * cpu_to_chip_id - Return the cpus chip-id | |
857 | * @cpu: The logical cpu number. | |
858 | * | |
859 | * Return the value of the ibm,chip-id property corresponding to the given | |
860 | * logical cpu number. If the chip-id can not be found, returns -1. | |
861 | */ | |
862 | int cpu_to_chip_id(int cpu) | |
863 | { | |
864 | struct device_node *np; | |
865 | ||
866 | np = of_get_cpu_node(cpu, NULL); | |
867 | if (!np) | |
868 | return -1; | |
869 | ||
870 | of_node_put(np); | |
871 | return of_get_ibm_chip_id(np); | |
872 | } | |
873 | EXPORT_SYMBOL(cpu_to_chip_id); | |
874 | ||
819d5965 SK |
875 | bool arch_match_cpu_phys_id(int cpu, u64 phys_id) |
876 | { | |
877 | return (int)phys_id == get_hard_smp_processor_id(cpu); | |
878 | } |