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Commit | Line | Data |
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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> |
9b6b563c PM |
50 | #include <asm/iommu.h> |
51 | #include <asm/btext.h> | |
52 | #include <asm/sections.h> | |
53 | #include <asm/machdep.h> | |
40ef8cbc | 54 | #include <asm/pci-bridge.h> |
2babf5c2 | 55 | #include <asm/kexec.h> |
14a43e69 | 56 | #include <asm/opal.h> |
eb39c880 | 57 | #include <asm/fadump.h> |
0dc3289c | 58 | #include <asm/debug.h> |
da6a97bf | 59 | #include <asm/epapr_hcalls.h> |
3808a889 | 60 | #include <asm/firmware.h> |
14a43e69 | 61 | |
37dd2bad | 62 | #include <mm/mmu_decl.h> |
9b6b563c PM |
63 | |
64 | #ifdef DEBUG | |
65 | #define DBG(fmt...) printk(KERN_ERR fmt) | |
66 | #else | |
67 | #define DBG(fmt...) | |
68 | #endif | |
69 | ||
9b6b563c | 70 | #ifdef CONFIG_PPC64 |
28897731 | 71 | int __initdata iommu_is_off; |
9b6b563c | 72 | int __initdata iommu_force_on; |
cf00a8d1 | 73 | unsigned long tce_alloc_start, tce_alloc_end; |
cd3db0c4 | 74 | u64 ppc64_rma_size; |
9b6b563c | 75 | #endif |
03bf469a | 76 | static phys_addr_t first_memblock_size; |
7ac87abb | 77 | static int __initdata boot_cpu_count; |
9b6b563c | 78 | |
2babf5c2 ME |
79 | static int __init early_parse_mem(char *p) |
80 | { | |
81 | if (!p) | |
82 | return 1; | |
83 | ||
84 | memory_limit = PAGE_ALIGN(memparse(p, &p)); | |
a84fcd46 | 85 | DBG("memory limit = 0x%llx\n", memory_limit); |
2babf5c2 ME |
86 | |
87 | return 0; | |
88 | } | |
89 | early_param("mem", early_parse_mem); | |
90 | ||
307cfe71 BH |
91 | /* |
92 | * overlaps_initrd - check for overlap with page aligned extension of | |
93 | * initrd. | |
94 | */ | |
95 | static inline int overlaps_initrd(unsigned long start, unsigned long size) | |
96 | { | |
97 | #ifdef CONFIG_BLK_DEV_INITRD | |
98 | if (!initrd_start) | |
99 | return 0; | |
100 | ||
101 | return (start + size) > _ALIGN_DOWN(initrd_start, PAGE_SIZE) && | |
102 | start <= _ALIGN_UP(initrd_end, PAGE_SIZE); | |
103 | #else | |
104 | return 0; | |
105 | #endif | |
106 | } | |
107 | ||
3c607ce2 LV |
108 | /** |
109 | * move_device_tree - move tree to an unused area, if needed. | |
110 | * | |
111 | * The device tree may be allocated beyond our memory limit, or inside the | |
307cfe71 BH |
112 | * crash kernel region for kdump, or within the page aligned range of initrd. |
113 | * If so, move it out of the way. | |
2babf5c2 | 114 | */ |
18f032cb | 115 | static void __init move_device_tree(void) |
2babf5c2 ME |
116 | { |
117 | unsigned long start, size; | |
118 | void *p; | |
119 | ||
120 | DBG("-> move_device_tree\n"); | |
121 | ||
122 | start = __pa(initial_boot_params); | |
060f78c2 | 123 | size = fdt_totalsize(initial_boot_params); |
2babf5c2 | 124 | |
6dd22700 | 125 | if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) || |
307cfe71 BH |
126 | overlaps_crashkernel(start, size) || |
127 | overlaps_initrd(start, size)) { | |
e63075a3 | 128 | p = __va(memblock_alloc(size, PAGE_SIZE)); |
2babf5c2 | 129 | memcpy(p, initial_boot_params, size); |
060f78c2 | 130 | initial_boot_params = p; |
2babf5c2 ME |
131 | DBG("Moved device tree to 0x%p\n", p); |
132 | } | |
133 | ||
134 | DBG("<- move_device_tree\n"); | |
135 | } | |
9b6b563c | 136 | |
d205819e PM |
137 | /* |
138 | * ibm,pa-features is a per-cpu property that contains a string of | |
139 | * attribute descriptors, each of which has a 2 byte header plus up | |
140 | * to 254 bytes worth of processor attribute bits. First header | |
141 | * byte specifies the number of bytes following the header. | |
142 | * Second header byte is an "attribute-specifier" type, of which | |
143 | * zero is the only currently-defined value. | |
144 | * Implementation: Pass in the byte and bit offset for the feature | |
145 | * that we are interested in. The function will return -1 if the | |
146 | * pa-features property is missing, or a 1/0 to indicate if the feature | |
147 | * is supported/not supported. Note that the bit numbers are | |
148 | * big-endian to match the definition in PAPR. | |
149 | */ | |
150 | static struct ibm_pa_feature { | |
151 | unsigned long cpu_features; /* CPU_FTR_xxx bit */ | |
44ae3ab3 | 152 | unsigned long mmu_features; /* MMU_FTR_xxx bit */ |
d205819e | 153 | unsigned int cpu_user_ftrs; /* PPC_FEATURE_xxx bit */ |
beff8237 | 154 | unsigned int cpu_user_ftrs2; /* PPC_FEATURE2_xxx bit */ |
d205819e PM |
155 | unsigned char pabyte; /* byte number in ibm,pa-features */ |
156 | unsigned char pabit; /* bit number (big-endian) */ | |
157 | unsigned char invert; /* if 1, pa bit set => clear feature */ | |
158 | } ibm_pa_features[] __initdata = { | |
beff8237 AB |
159 | {0, 0, PPC_FEATURE_HAS_MMU, 0, 0, 0, 0}, |
160 | {0, 0, PPC_FEATURE_HAS_FPU, 0, 0, 1, 0}, | |
161 | {CPU_FTR_CTRL, 0, 0, 0, 0, 3, 0}, | |
162 | {CPU_FTR_NOEXECUTE, 0, 0, 0, 0, 6, 0}, | |
163 | {CPU_FTR_NODSISRALIGN, 0, 0, 0, 1, 1, 1}, | |
164 | {0, MMU_FTR_CI_LARGE_PAGE, 0, 0, 1, 2, 0}, | |
165 | {CPU_FTR_REAL_LE, 0, PPC_FEATURE_TRUE_LE, 0, 5, 0, 0}, | |
9e819963 | 166 | /* |
4705e024 AB |
167 | * If the kernel doesn't support TM (ie CONFIG_PPC_TRANSACTIONAL_MEM=n), |
168 | * we don't want to turn on TM here, so we use the *_COMP versions | |
169 | * which are 0 if the kernel doesn't support TM. | |
9e819963 | 170 | */ |
4705e024 AB |
171 | {CPU_FTR_TM_COMP, 0, 0, |
172 | PPC_FEATURE2_HTM_COMP|PPC_FEATURE2_HTM_NOSC_COMP, 22, 0, 0}, | |
5a25b6f5 | 173 | {0, MMU_FTR_TYPE_RADIX, 0, 0, 40, 0, 0}, |
d205819e PM |
174 | }; |
175 | ||
9d0c4dfe | 176 | static void __init scan_features(unsigned long node, const unsigned char *ftrs, |
974a76f5 PM |
177 | unsigned long tablelen, |
178 | struct ibm_pa_feature *fp, | |
179 | unsigned long ft_size) | |
d205819e | 180 | { |
974a76f5 | 181 | unsigned long i, len, bit; |
d205819e PM |
182 | |
183 | /* find descriptor with type == 0 */ | |
184 | for (;;) { | |
185 | if (tablelen < 3) | |
186 | return; | |
974a76f5 | 187 | len = 2 + ftrs[0]; |
d205819e PM |
188 | if (tablelen < len) |
189 | return; /* descriptor 0 not found */ | |
974a76f5 | 190 | if (ftrs[1] == 0) |
d205819e PM |
191 | break; |
192 | tablelen -= len; | |
974a76f5 | 193 | ftrs += len; |
d205819e PM |
194 | } |
195 | ||
196 | /* loop over bits we know about */ | |
974a76f5 PM |
197 | for (i = 0; i < ft_size; ++i, ++fp) { |
198 | if (fp->pabyte >= ftrs[0]) | |
d205819e | 199 | continue; |
974a76f5 | 200 | bit = (ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1; |
d205819e PM |
201 | if (bit ^ fp->invert) { |
202 | cur_cpu_spec->cpu_features |= fp->cpu_features; | |
203 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs; | |
beff8237 | 204 | cur_cpu_spec->cpu_user_features2 |= fp->cpu_user_ftrs2; |
44ae3ab3 | 205 | cur_cpu_spec->mmu_features |= fp->mmu_features; |
d205819e PM |
206 | } else { |
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 | } |
212 | } | |
213 | } | |
214 | ||
974a76f5 PM |
215 | static void __init check_cpu_pa_features(unsigned long node) |
216 | { | |
9d0c4dfe RH |
217 | const unsigned char *pa_ftrs; |
218 | int tablelen; | |
974a76f5 PM |
219 | |
220 | pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen); | |
221 | if (pa_ftrs == NULL) | |
222 | return; | |
223 | ||
224 | scan_features(node, pa_ftrs, tablelen, | |
225 | ibm_pa_features, ARRAY_SIZE(ibm_pa_features)); | |
226 | } | |
227 | ||
94491685 | 228 | #ifdef CONFIG_PPC_STD_MMU_64 |
9c61f7a0 | 229 | static void __init init_mmu_slb_size(unsigned long node) |
584f8b71 | 230 | { |
9d0c4dfe | 231 | const __be32 *slb_size_ptr; |
584f8b71 | 232 | |
9c61f7a0 AK |
233 | slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL) ? : |
234 | of_get_flat_dt_prop(node, "ibm,slb-size", NULL); | |
235 | ||
236 | if (slb_size_ptr) | |
dc0e643a | 237 | mmu_slb_size = be32_to_cpup(slb_size_ptr); |
584f8b71 MN |
238 | } |
239 | #else | |
9c61f7a0 | 240 | #define init_mmu_slb_size(node) do { } while(0) |
584f8b71 MN |
241 | #endif |
242 | ||
974a76f5 PM |
243 | static struct feature_property { |
244 | const char *name; | |
245 | u32 min_value; | |
246 | unsigned long cpu_feature; | |
247 | unsigned long cpu_user_ftr; | |
248 | } feature_properties[] __initdata = { | |
249 | #ifdef CONFIG_ALTIVEC | |
250 | {"altivec", 0, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
251 | {"ibm,vmx", 1, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
252 | #endif /* CONFIG_ALTIVEC */ | |
b962ce9d MN |
253 | #ifdef CONFIG_VSX |
254 | /* Yes, this _really_ is ibm,vmx == 2 to enable VSX */ | |
255 | {"ibm,vmx", 2, CPU_FTR_VSX, PPC_FEATURE_HAS_VSX}, | |
256 | #endif /* CONFIG_VSX */ | |
974a76f5 PM |
257 | #ifdef CONFIG_PPC64 |
258 | {"ibm,dfp", 1, 0, PPC_FEATURE_HAS_DFP}, | |
259 | {"ibm,purr", 1, CPU_FTR_PURR, 0}, | |
260 | {"ibm,spurr", 1, CPU_FTR_SPURR, 0}, | |
261 | #endif /* CONFIG_PPC64 */ | |
262 | }; | |
263 | ||
14b3d926 VB |
264 | #if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU) |
265 | static inline void identical_pvr_fixup(unsigned long node) | |
266 | { | |
267 | unsigned int pvr; | |
9d0c4dfe | 268 | const char *model = of_get_flat_dt_prop(node, "model", NULL); |
14b3d926 VB |
269 | |
270 | /* | |
271 | * Since 440GR(x)/440EP(x) processors have the same pvr, | |
272 | * we check the node path and set bit 28 in the cur_cpu_spec | |
273 | * pvr for EP(x) processor version. This bit is always 0 in | |
274 | * the "real" pvr. Then we call identify_cpu again with | |
275 | * the new logical pvr to enable FPU support. | |
276 | */ | |
277 | if (model && strstr(model, "440EP")) { | |
278 | pvr = cur_cpu_spec->pvr_value | 0x8; | |
279 | identify_cpu(0, pvr); | |
280 | DBG("Using logical pvr %x for %s\n", pvr, model); | |
281 | } | |
282 | } | |
283 | #else | |
284 | #define identical_pvr_fixup(node) do { } while(0) | |
285 | #endif | |
286 | ||
974a76f5 PM |
287 | static void __init check_cpu_feature_properties(unsigned long node) |
288 | { | |
289 | unsigned long i; | |
290 | struct feature_property *fp = feature_properties; | |
dc0e643a | 291 | const __be32 *prop; |
974a76f5 PM |
292 | |
293 | for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) { | |
294 | prop = of_get_flat_dt_prop(node, fp->name, NULL); | |
dc0e643a | 295 | if (prop && be32_to_cpup(prop) >= fp->min_value) { |
974a76f5 PM |
296 | cur_cpu_spec->cpu_features |= fp->cpu_feature; |
297 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr; | |
298 | } | |
299 | } | |
300 | } | |
301 | ||
9b6b563c | 302 | static int __init early_init_dt_scan_cpus(unsigned long node, |
4df20460 AB |
303 | const char *uname, int depth, |
304 | void *data) | |
9b6b563c | 305 | { |
9d0c4dfe | 306 | const char *type = of_get_flat_dt_prop(node, "device_type", NULL); |
dc0e643a IM |
307 | const __be32 *prop; |
308 | const __be32 *intserv; | |
4df20460 | 309 | int i, nthreads; |
9d0c4dfe | 310 | int len; |
9d07bc84 | 311 | int found = -1; |
208b3a4c | 312 | int found_thread = 0; |
9b6b563c PM |
313 | |
314 | /* We are scanning "cpu" nodes only */ | |
315 | if (type == NULL || strcmp(type, "cpu") != 0) | |
316 | return 0; | |
317 | ||
4df20460 AB |
318 | /* Get physical cpuid */ |
319 | intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len); | |
e16c8765 AF |
320 | if (!intserv) |
321 | intserv = of_get_flat_dt_prop(node, "reg", &len); | |
322 | ||
323 | nthreads = len / sizeof(int); | |
4df20460 AB |
324 | |
325 | /* | |
326 | * Now see if any of these threads match our boot cpu. | |
327 | * NOTE: This must match the parsing done in smp_setup_cpu_maps. | |
328 | */ | |
329 | for (i = 0; i < nthreads; i++) { | |
330 | /* | |
331 | * version 2 of the kexec param format adds the phys cpuid of | |
332 | * booted proc. | |
333 | */ | |
060f78c2 | 334 | if (fdt_version(initial_boot_params) >= 2) { |
dc0e643a | 335 | if (be32_to_cpu(intserv[i]) == |
060f78c2 | 336 | fdt_boot_cpuid_phys(initial_boot_params)) { |
9d07bc84 | 337 | found = boot_cpu_count; |
208b3a4c BH |
338 | found_thread = i; |
339 | } | |
4df20460 AB |
340 | } else { |
341 | /* | |
342 | * Check if it's the boot-cpu, set it's hw index now, | |
343 | * unfortunately this format did not support booting | |
344 | * off secondary threads. | |
345 | */ | |
346 | if (of_get_flat_dt_prop(node, | |
9d07bc84 BH |
347 | "linux,boot-cpu", NULL) != NULL) |
348 | found = boot_cpu_count; | |
9b6b563c | 349 | } |
4df20460 AB |
350 | #ifdef CONFIG_SMP |
351 | /* logical cpu id is always 0 on UP kernels */ | |
9d07bc84 | 352 | boot_cpu_count++; |
4df20460 AB |
353 | #endif |
354 | } | |
355 | ||
7222f779 BH |
356 | /* Not the boot CPU */ |
357 | if (found < 0) | |
358 | return 0; | |
9b6b563c | 359 | |
7222f779 BH |
360 | DBG("boot cpu: logical %d physical %d\n", found, |
361 | be32_to_cpu(intserv[found_thread])); | |
362 | boot_cpuid = found; | |
363 | set_hard_smp_processor_id(found, be32_to_cpu(intserv[found_thread])); | |
14b3d926 | 364 | |
7222f779 BH |
365 | /* |
366 | * PAPR defines "logical" PVR values for cpus that | |
367 | * meet various levels of the architecture: | |
368 | * 0x0f000001 Architecture version 2.04 | |
369 | * 0x0f000002 Architecture version 2.05 | |
370 | * If the cpu-version property in the cpu node contains | |
371 | * such a value, we call identify_cpu again with the | |
372 | * logical PVR value in order to use the cpu feature | |
373 | * bits appropriate for the architecture level. | |
374 | * | |
375 | * A POWER6 partition in "POWER6 architected" mode | |
376 | * uses the 0x0f000002 PVR value; in POWER5+ mode | |
377 | * it uses 0x0f000001. | |
378 | */ | |
379 | prop = of_get_flat_dt_prop(node, "cpu-version", NULL); | |
380 | if (prop && (be32_to_cpup(prop) & 0xff000000) == 0x0f000000) | |
381 | identify_cpu(0, be32_to_cpup(prop)); | |
382 | ||
383 | identical_pvr_fixup(node); | |
9b6b563c | 384 | |
974a76f5 | 385 | check_cpu_feature_properties(node); |
d205819e | 386 | check_cpu_pa_features(node); |
9c61f7a0 | 387 | init_mmu_slb_size(node); |
d205819e | 388 | |
4a85b31d | 389 | #ifdef CONFIG_PPC64 |
4df20460 | 390 | if (nthreads > 1) |
9b6b563c | 391 | cur_cpu_spec->cpu_features |= CPU_FTR_SMT; |
4df20460 AB |
392 | else |
393 | cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT; | |
9b6b563c | 394 | #endif |
9b6b563c PM |
395 | return 0; |
396 | } | |
397 | ||
e51df2c1 AB |
398 | static int __init early_init_dt_scan_chosen_ppc(unsigned long node, |
399 | const char *uname, | |
400 | int depth, void *data) | |
9b6b563c | 401 | { |
9d0c4dfe | 402 | const unsigned long *lprop; /* All these set by kernel, so no need to convert endian */ |
9b6b563c | 403 | |
32c97689 GL |
404 | /* Use common scan routine to determine if this is the chosen node */ |
405 | if (early_init_dt_scan_chosen(node, uname, depth, data) == 0) | |
406 | return 0; | |
407 | ||
9b6b563c PM |
408 | #ifdef CONFIG_PPC64 |
409 | /* check if iommu is forced on or off */ | |
3c726f8d | 410 | if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL) |
9b6b563c | 411 | iommu_is_off = 1; |
3c726f8d | 412 | if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL) |
9b6b563c PM |
413 | iommu_force_on = 1; |
414 | #endif | |
415 | ||
2babf5c2 | 416 | /* mem=x on the command line is the preferred mechanism */ |
86e03221 GL |
417 | lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL); |
418 | if (lprop) | |
419 | memory_limit = *lprop; | |
9b6b563c PM |
420 | |
421 | #ifdef CONFIG_PPC64 | |
86e03221 GL |
422 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL); |
423 | if (lprop) | |
424 | tce_alloc_start = *lprop; | |
425 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL); | |
426 | if (lprop) | |
427 | tce_alloc_end = *lprop; | |
9b6b563c PM |
428 | #endif |
429 | ||
dcee3036 | 430 | #ifdef CONFIG_KEXEC |
63277161 | 431 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL); |
70c6cc37 LV |
432 | if (lprop) |
433 | crashk_res.start = *lprop; | |
dcee3036 | 434 | |
63277161 | 435 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL); |
70c6cc37 LV |
436 | if (lprop) |
437 | crashk_res.end = crashk_res.start + *lprop - 1; | |
dcee3036 | 438 | #endif |
32c97689 GL |
439 | |
440 | /* break now */ | |
441 | return 1; | |
9b6b563c PM |
442 | } |
443 | ||
0204568a PM |
444 | #ifdef CONFIG_PPC_PSERIES |
445 | /* | |
446 | * Interpret the ibm,dynamic-memory property in the | |
447 | * /ibm,dynamic-reconfiguration-memory node. | |
448 | * This contains a list of memory blocks along with NUMA affinity | |
449 | * information. | |
450 | */ | |
451 | static int __init early_init_dt_scan_drconf_memory(unsigned long node) | |
452 | { | |
9d0c4dfe RH |
453 | const __be32 *dm, *ls, *usm; |
454 | int l; | |
455 | unsigned long n, flags; | |
95f72d1e | 456 | u64 base, size, memblock_size; |
cf00085d | 457 | unsigned int is_kexec_kdump = 0, rngs; |
0204568a | 458 | |
3fdfd990 | 459 | ls = of_get_flat_dt_prop(node, "ibm,lmb-size", &l); |
0f0b56c3 | 460 | if (ls == NULL || l < dt_root_size_cells * sizeof(__be32)) |
0204568a | 461 | return 0; |
95f72d1e | 462 | memblock_size = dt_mem_next_cell(dt_root_size_cells, &ls); |
0204568a | 463 | |
63277161 | 464 | dm = of_get_flat_dt_prop(node, "ibm,dynamic-memory", &l); |
0f0b56c3 | 465 | if (dm == NULL || l < sizeof(__be32)) |
0204568a PM |
466 | return 0; |
467 | ||
e91ae5bd | 468 | n = of_read_number(dm++, 1); /* number of entries */ |
0f0b56c3 | 469 | if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(__be32)) |
0204568a PM |
470 | return 0; |
471 | ||
cf00085d | 472 | /* check if this is a kexec/kdump kernel. */ |
63277161 | 473 | usm = of_get_flat_dt_prop(node, "linux,drconf-usable-memory", |
cf00085d C |
474 | &l); |
475 | if (usm != NULL) | |
476 | is_kexec_kdump = 1; | |
477 | ||
0204568a PM |
478 | for (; n != 0; --n) { |
479 | base = dt_mem_next_cell(dt_root_addr_cells, &dm); | |
e91ae5bd | 480 | flags = of_read_number(&dm[3], 1); |
0204568a PM |
481 | /* skip DRC index, pad, assoc. list index, flags */ |
482 | dm += 4; | |
9afac933 AK |
483 | /* skip this block if the reserved bit is set in flags |
484 | or if the block is not assigned to this partition */ | |
485 | if ((flags & DRCONF_MEM_RESERVED) || | |
486 | !(flags & DRCONF_MEM_ASSIGNED)) | |
0204568a | 487 | continue; |
95f72d1e | 488 | size = memblock_size; |
cf00085d C |
489 | rngs = 1; |
490 | if (is_kexec_kdump) { | |
491 | /* | |
95f72d1e | 492 | * For each memblock in ibm,dynamic-memory, a corresponding |
cf00085d C |
493 | * entry in linux,drconf-usable-memory property contains |
494 | * a counter 'p' followed by 'p' (base, size) duple. | |
495 | * Now read the counter from | |
496 | * linux,drconf-usable-memory property | |
497 | */ | |
498 | rngs = dt_mem_next_cell(dt_root_size_cells, &usm); | |
499 | if (!rngs) /* there are no (base, size) duple */ | |
0204568a | 500 | continue; |
0204568a | 501 | } |
cf00085d C |
502 | do { |
503 | if (is_kexec_kdump) { | |
504 | base = dt_mem_next_cell(dt_root_addr_cells, | |
505 | &usm); | |
506 | size = dt_mem_next_cell(dt_root_size_cells, | |
507 | &usm); | |
508 | } | |
509 | if (iommu_is_off) { | |
510 | if (base >= 0x80000000ul) | |
511 | continue; | |
512 | if ((base + size) > 0x80000000ul) | |
513 | size = 0x80000000ul - base; | |
514 | } | |
95f72d1e | 515 | memblock_add(base, size); |
cf00085d | 516 | } while (--rngs); |
0204568a | 517 | } |
95f72d1e | 518 | memblock_dump_all(); |
0204568a PM |
519 | return 0; |
520 | } | |
521 | #else | |
522 | #define early_init_dt_scan_drconf_memory(node) 0 | |
523 | #endif /* CONFIG_PPC_PSERIES */ | |
9b6b563c | 524 | |
51975db0 GL |
525 | static int __init early_init_dt_scan_memory_ppc(unsigned long node, |
526 | const char *uname, | |
527 | int depth, void *data) | |
9b6b563c | 528 | { |
0204568a PM |
529 | if (depth == 1 && |
530 | strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0) | |
531 | return early_init_dt_scan_drconf_memory(node); | |
51975db0 GL |
532 | |
533 | return early_init_dt_scan_memory(node, uname, depth, data); | |
534 | } | |
0204568a | 535 | |
b27652dd KH |
536 | /* |
537 | * For a relocatable kernel, we need to get the memstart_addr first, | |
538 | * then use it to calculate the virtual kernel start address. This has | |
539 | * to happen at a very early stage (before machine_init). In this case, | |
540 | * we just want to get the memstart_address and would not like to mess the | |
541 | * memblock at this stage. So introduce a variable to skip the memblock_add() | |
542 | * for this reason. | |
543 | */ | |
544 | #ifdef CONFIG_RELOCATABLE | |
545 | static int add_mem_to_memblock = 1; | |
546 | #else | |
547 | #define add_mem_to_memblock 1 | |
548 | #endif | |
549 | ||
51975db0 GL |
550 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) |
551 | { | |
cd3db0c4 | 552 | #ifdef CONFIG_PPC64 |
51975db0 GL |
553 | if (iommu_is_off) { |
554 | if (base >= 0x80000000ul) | |
555 | return; | |
556 | if ((base + size) > 0x80000000ul) | |
557 | size = 0x80000000ul - base; | |
558 | } | |
9b6b563c | 559 | #endif |
03bf469a BH |
560 | /* Keep track of the beginning of memory -and- the size of |
561 | * the very first block in the device-tree as it represents | |
562 | * the RMA on ppc64 server | |
563 | */ | |
564 | if (base < memstart_addr) { | |
565 | memstart_addr = base; | |
566 | first_memblock_size = size; | |
567 | } | |
cd3db0c4 BH |
568 | |
569 | /* Add the chunk to the MEMBLOCK list */ | |
b27652dd KH |
570 | if (add_mem_to_memblock) |
571 | memblock_add(base, size); | |
9b6b563c PM |
572 | } |
573 | ||
c039e3a8 | 574 | static void __init early_reserve_mem_dt(void) |
0962e800 | 575 | { |
9d0c4dfe RH |
576 | unsigned long i, dt_root; |
577 | int len; | |
0962e800 JK |
578 | const __be32 *prop; |
579 | ||
24bbd929 | 580 | early_init_fdt_reserve_self(); |
edba274c RH |
581 | early_init_fdt_scan_reserved_mem(); |
582 | ||
0962e800 JK |
583 | dt_root = of_get_flat_dt_root(); |
584 | ||
585 | prop = of_get_flat_dt_prop(dt_root, "reserved-ranges", &len); | |
586 | ||
587 | if (!prop) | |
c039e3a8 BH |
588 | return; |
589 | ||
590 | DBG("Found new-style reserved-ranges\n"); | |
0962e800 JK |
591 | |
592 | /* Each reserved range is an (address,size) pair, 2 cells each, | |
593 | * totalling 4 cells per range. */ | |
594 | for (i = 0; i < len / (sizeof(*prop) * 4); i++) { | |
595 | u64 base, size; | |
596 | ||
597 | base = of_read_number(prop + (i * 4) + 0, 2); | |
598 | size = of_read_number(prop + (i * 4) + 2, 2); | |
599 | ||
c039e3a8 BH |
600 | if (size) { |
601 | DBG("reserving: %llx -> %llx\n", base, size); | |
0962e800 | 602 | memblock_reserve(base, size); |
c039e3a8 | 603 | } |
0962e800 | 604 | } |
0962e800 JK |
605 | } |
606 | ||
9b6b563c PM |
607 | static void __init early_reserve_mem(void) |
608 | { | |
dc0e643a | 609 | __be64 *reserve_map; |
9b6b563c | 610 | |
dc0e643a | 611 | reserve_map = (__be64 *)(((unsigned long)initial_boot_params) + |
060f78c2 | 612 | fdt_off_mem_rsvmap(initial_boot_params)); |
4d1f3f25 | 613 | |
c039e3a8 BH |
614 | /* Look for the new "reserved-regions" property in the DT */ |
615 | early_reserve_mem_dt(); | |
0962e800 | 616 | |
30437b3e | 617 | #ifdef CONFIG_BLK_DEV_INITRD |
c039e3a8 BH |
618 | /* Then reserve the initrd, if any */ |
619 | if (initrd_start && (initrd_end > initrd_start)) { | |
307cfe71 BH |
620 | memblock_reserve(_ALIGN_DOWN(__pa(initrd_start), PAGE_SIZE), |
621 | _ALIGN_UP(initrd_end, PAGE_SIZE) - | |
622 | _ALIGN_DOWN(initrd_start, PAGE_SIZE)); | |
c039e3a8 | 623 | } |
30437b3e DG |
624 | #endif /* CONFIG_BLK_DEV_INITRD */ |
625 | ||
cbbcf340 KG |
626 | #ifdef CONFIG_PPC32 |
627 | /* | |
628 | * Handle the case where we might be booting from an old kexec | |
629 | * image that setup the mem_rsvmap as pairs of 32-bit values | |
630 | */ | |
dc0e643a | 631 | if (be64_to_cpup(reserve_map) > 0xffffffffull) { |
cbbcf340 | 632 | u32 base_32, size_32; |
dc0e643a | 633 | __be32 *reserve_map_32 = (__be32 *)reserve_map; |
cbbcf340 | 634 | |
c039e3a8 BH |
635 | DBG("Found old 32-bit reserve map\n"); |
636 | ||
cbbcf340 | 637 | while (1) { |
dc0e643a IM |
638 | base_32 = be32_to_cpup(reserve_map_32++); |
639 | size_32 = be32_to_cpup(reserve_map_32++); | |
cbbcf340 KG |
640 | if (size_32 == 0) |
641 | break; | |
329dda08 | 642 | DBG("reserving: %x -> %x\n", base_32, size_32); |
95f72d1e | 643 | memblock_reserve(base_32, size_32); |
cbbcf340 KG |
644 | } |
645 | return; | |
646 | } | |
647 | #endif | |
9b6b563c PM |
648 | } |
649 | ||
650 | void __init early_init_devtree(void *params) | |
651 | { | |
49a84965 | 652 | phys_addr_t limit; |
6ca4f749 | 653 | |
44348105 | 654 | DBG(" -> early_init_devtree(%p)\n", params); |
9b6b563c | 655 | |
ad72a279 ME |
656 | /* Too early to BUG_ON(), do it by hand */ |
657 | if (!early_init_dt_verify(params)) | |
658 | panic("BUG: Failed verifying flat device tree, bad version?"); | |
659 | ||
458148c0 ME |
660 | #ifdef CONFIG_PPC_RTAS |
661 | /* Some machines might need RTAS info for debugging, grab it now. */ | |
662 | of_scan_flat_dt(early_init_dt_scan_rtas, NULL); | |
663 | #endif | |
664 | ||
14a43e69 BH |
665 | #ifdef CONFIG_PPC_POWERNV |
666 | /* Some machines might need OPAL info for debugging, grab it now. */ | |
667 | of_scan_flat_dt(early_init_dt_scan_opal, NULL); | |
668 | #endif | |
669 | ||
eb39c880 MS |
670 | #ifdef CONFIG_FA_DUMP |
671 | /* scan tree to see if dump is active during last boot */ | |
672 | of_scan_flat_dt(early_init_dt_scan_fw_dump, NULL); | |
673 | #endif | |
674 | ||
9b6b563c PM |
675 | /* Retrieve various informations from the /chosen node of the |
676 | * device-tree, including the platform type, initrd location and | |
677 | * size, TCE reserve, and more ... | |
678 | */ | |
3e47d147 | 679 | of_scan_flat_dt(early_init_dt_scan_chosen_ppc, boot_command_line); |
9b6b563c | 680 | |
95f72d1e | 681 | /* Scan memory nodes and rebuild MEMBLOCKs */ |
3c726f8d | 682 | of_scan_flat_dt(early_init_dt_scan_root, NULL); |
51975db0 | 683 | of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); |
846f77b0 | 684 | |
846f77b0 ME |
685 | parse_early_param(); |
686 | ||
ba14f649 KG |
687 | /* make sure we've parsed cmdline for mem= before this */ |
688 | if (memory_limit) | |
a84fcd46 | 689 | first_memblock_size = min_t(u64, first_memblock_size, memory_limit); |
ba14f649 | 690 | setup_initial_memory_limit(memstart_addr, first_memblock_size); |
95f72d1e YL |
691 | /* Reserve MEMBLOCK regions used by kernel, initrd, dt, etc... */ |
692 | memblock_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); | |
549e8152 PM |
693 | /* If relocatable, reserve first 32k for interrupt vectors etc. */ |
694 | if (PHYSICAL_START > MEMORY_START) | |
95f72d1e | 695 | memblock_reserve(MEMORY_START, 0x8000); |
47310413 | 696 | reserve_kdump_trampoline(); |
eb39c880 MS |
697 | #ifdef CONFIG_FA_DUMP |
698 | /* | |
699 | * If we fail to reserve memory for firmware-assisted dump then | |
700 | * fallback to kexec based kdump. | |
701 | */ | |
702 | if (fadump_reserve_mem() == 0) | |
703 | #endif | |
704 | reserve_crashkernel(); | |
9b6b563c PM |
705 | early_reserve_mem(); |
706 | ||
14ed7409 | 707 | /* Ensure that total memory size is page-aligned. */ |
6fbef13c | 708 | limit = ALIGN(memory_limit ?: memblock_phys_mem_size(), PAGE_SIZE); |
95f72d1e | 709 | memblock_enforce_memory_limit(limit); |
6ca4f749 | 710 | |
1aadc056 | 711 | memblock_allow_resize(); |
95f72d1e | 712 | memblock_dump_all(); |
2babf5c2 | 713 | |
95f72d1e | 714 | DBG("Phys. mem: %llx\n", memblock_phys_mem_size()); |
2babf5c2 ME |
715 | |
716 | /* We may need to relocate the flat tree, do it now. | |
717 | * FIXME .. and the initrd too? */ | |
718 | move_device_tree(); | |
719 | ||
1426d5a3 ME |
720 | allocate_pacas(); |
721 | ||
9b6b563c PM |
722 | DBG("Scanning CPUs ...\n"); |
723 | ||
25985edc | 724 | /* Retrieve CPU related informations from the flat tree |
3c726f8d | 725 | * (altivec support, boot CPU ID, ...) |
9b6b563c | 726 | */ |
3c726f8d | 727 | of_scan_flat_dt(early_init_dt_scan_cpus, NULL); |
36ae37e3 | 728 | if (boot_cpuid < 0) { |
d939be3a | 729 | printk("Failed to identify boot CPU !\n"); |
36ae37e3 BH |
730 | BUG(); |
731 | } | |
9b6b563c | 732 | |
7ac87abb ME |
733 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC64) |
734 | /* We'll later wait for secondaries to check in; there are | |
735 | * NCPUS-1 non-boot CPUs :-) | |
736 | */ | |
737 | spinning_secondaries = boot_cpu_count - 1; | |
738 | #endif | |
739 | ||
1a01dc87 ME |
740 | mmu_early_init_devtree(); |
741 | ||
55672ecf MS |
742 | #ifdef CONFIG_PPC_POWERNV |
743 | /* Scan and build the list of machine check recoverable ranges */ | |
744 | of_scan_flat_dt(early_init_dt_scan_recoverable_ranges, NULL); | |
745 | #endif | |
da6a97bf | 746 | epapr_paravirt_early_init(); |
55672ecf | 747 | |
3808a889 BH |
748 | /* Now try to figure out if we are running on LPAR and so on */ |
749 | pseries_probe_fw_features(); | |
750 | ||
166dd7d3 BH |
751 | #ifdef CONFIG_PPC_PS3 |
752 | /* Identify PS3 firmware */ | |
753 | if (of_flat_dt_is_compatible(of_get_flat_dt_root(), "sony,ps3")) | |
754 | powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE; | |
755 | #endif | |
756 | ||
9b6b563c PM |
757 | DBG(" <- early_init_devtree()\n"); |
758 | } | |
759 | ||
b27652dd KH |
760 | #ifdef CONFIG_RELOCATABLE |
761 | /* | |
762 | * This function run before early_init_devtree, so we have to init | |
763 | * initial_boot_params. | |
764 | */ | |
765 | void __init early_get_first_memblock_info(void *params, phys_addr_t *size) | |
766 | { | |
767 | /* Setup flat device-tree pointer */ | |
768 | initial_boot_params = params; | |
769 | ||
770 | /* | |
771 | * Scan the memory nodes and set add_mem_to_memblock to 0 to avoid | |
772 | * mess the memblock. | |
773 | */ | |
774 | add_mem_to_memblock = 0; | |
775 | of_scan_flat_dt(early_init_dt_scan_root, NULL); | |
776 | of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); | |
777 | add_mem_to_memblock = 1; | |
778 | ||
779 | if (size) | |
780 | *size = first_memblock_size; | |
781 | } | |
782 | #endif | |
783 | ||
9b6b563c PM |
784 | /******* |
785 | * | |
786 | * New implementation of the OF "find" APIs, return a refcounted | |
787 | * object, call of_node_put() when done. The device tree and list | |
788 | * are protected by a rw_lock. | |
789 | * | |
790 | * Note that property management will need some locking as well, | |
791 | * this isn't dealt with yet. | |
792 | * | |
793 | *******/ | |
794 | ||
b37193b7 BH |
795 | /** |
796 | * of_get_ibm_chip_id - Returns the IBM "chip-id" of a device | |
797 | * @np: device node of the device | |
798 | * | |
799 | * This looks for a property "ibm,chip-id" in the node or any | |
800 | * of its parents and returns its content, or -1 if it cannot | |
801 | * be found. | |
802 | */ | |
803 | int of_get_ibm_chip_id(struct device_node *np) | |
804 | { | |
805 | of_node_get(np); | |
1856f50c | 806 | while (np) { |
1856f50c | 807 | u32 chip_id; |
b37193b7 | 808 | |
1856f50c CJ |
809 | /* |
810 | * Skiboot may produce memory nodes that contain more than one | |
811 | * cell in chip-id, we only read the first one here. | |
812 | */ | |
813 | if (!of_property_read_u32(np, "ibm,chip-id", &chip_id)) { | |
b37193b7 | 814 | of_node_put(np); |
1856f50c | 815 | return chip_id; |
b37193b7 | 816 | } |
16c1d606 ME |
817 | |
818 | np = of_get_next_parent(np); | |
b37193b7 BH |
819 | } |
820 | return -1; | |
821 | } | |
b130e7c0 | 822 | EXPORT_SYMBOL(of_get_ibm_chip_id); |
b37193b7 | 823 | |
3eb906c6 ME |
824 | /** |
825 | * cpu_to_chip_id - Return the cpus chip-id | |
826 | * @cpu: The logical cpu number. | |
827 | * | |
828 | * Return the value of the ibm,chip-id property corresponding to the given | |
829 | * logical cpu number. If the chip-id can not be found, returns -1. | |
830 | */ | |
831 | int cpu_to_chip_id(int cpu) | |
832 | { | |
833 | struct device_node *np; | |
834 | ||
835 | np = of_get_cpu_node(cpu, NULL); | |
836 | if (!np) | |
837 | return -1; | |
838 | ||
839 | of_node_put(np); | |
840 | return of_get_ibm_chip_id(np); | |
841 | } | |
842 | EXPORT_SYMBOL(cpu_to_chip_id); | |
843 | ||
819d5965 SH |
844 | bool arch_match_cpu_phys_id(int cpu, u64 phys_id) |
845 | { | |
846 | return (int)phys_id == get_hard_smp_processor_id(cpu); | |
847 | } |