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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> | |
30 | #include <linux/module.h> | |
dcee3036 | 31 | #include <linux/kexec.h> |
7a4571ae | 32 | #include <linux/debugfs.h> |
0ebfff14 | 33 | #include <linux/irq.h> |
95f72d1e | 34 | #include <linux/memblock.h> |
9b6b563c PM |
35 | |
36 | #include <asm/prom.h> | |
37 | #include <asm/rtas.h> | |
9b6b563c PM |
38 | #include <asm/page.h> |
39 | #include <asm/processor.h> | |
40 | #include <asm/irq.h> | |
41 | #include <asm/io.h> | |
0cc4746c | 42 | #include <asm/kdump.h> |
9b6b563c PM |
43 | #include <asm/smp.h> |
44 | #include <asm/system.h> | |
45 | #include <asm/mmu.h> | |
1426d5a3 | 46 | #include <asm/paca.h> |
9b6b563c PM |
47 | #include <asm/pgtable.h> |
48 | #include <asm/pci.h> | |
49 | #include <asm/iommu.h> | |
50 | #include <asm/btext.h> | |
51 | #include <asm/sections.h> | |
52 | #include <asm/machdep.h> | |
53 | #include <asm/pSeries_reconfig.h> | |
40ef8cbc | 54 | #include <asm/pci-bridge.h> |
6ac26c8a | 55 | #include <asm/phyp_dump.h> |
2babf5c2 | 56 | #include <asm/kexec.h> |
37dd2bad | 57 | #include <mm/mmu_decl.h> |
9b6b563c PM |
58 | |
59 | #ifdef DEBUG | |
60 | #define DBG(fmt...) printk(KERN_ERR fmt) | |
61 | #else | |
62 | #define DBG(fmt...) | |
63 | #endif | |
64 | ||
9b6b563c | 65 | #ifdef CONFIG_PPC64 |
28897731 | 66 | int __initdata iommu_is_off; |
9b6b563c | 67 | int __initdata iommu_force_on; |
cf00a8d1 | 68 | unsigned long tce_alloc_start, tce_alloc_end; |
cd3db0c4 | 69 | u64 ppc64_rma_size; |
9b6b563c PM |
70 | #endif |
71 | ||
2babf5c2 ME |
72 | static int __init early_parse_mem(char *p) |
73 | { | |
74 | if (!p) | |
75 | return 1; | |
76 | ||
77 | memory_limit = PAGE_ALIGN(memparse(p, &p)); | |
49a84965 | 78 | DBG("memory limit = 0x%llx\n", (unsigned long long)memory_limit); |
2babf5c2 ME |
79 | |
80 | return 0; | |
81 | } | |
82 | early_param("mem", early_parse_mem); | |
83 | ||
3c607ce2 LV |
84 | /** |
85 | * move_device_tree - move tree to an unused area, if needed. | |
86 | * | |
87 | * The device tree may be allocated beyond our memory limit, or inside the | |
88 | * crash kernel region for kdump. If so, move it out of the way. | |
2babf5c2 | 89 | */ |
18f032cb | 90 | static void __init move_device_tree(void) |
2babf5c2 ME |
91 | { |
92 | unsigned long start, size; | |
93 | void *p; | |
94 | ||
95 | DBG("-> move_device_tree\n"); | |
96 | ||
97 | start = __pa(initial_boot_params); | |
087f79c4 | 98 | size = be32_to_cpu(initial_boot_params->totalsize); |
2babf5c2 | 99 | |
6dd22700 | 100 | if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) || |
2babf5c2 | 101 | overlaps_crashkernel(start, size)) { |
e63075a3 | 102 | p = __va(memblock_alloc(size, PAGE_SIZE)); |
2babf5c2 ME |
103 | memcpy(p, initial_boot_params, size); |
104 | initial_boot_params = (struct boot_param_header *)p; | |
105 | DBG("Moved device tree to 0x%p\n", p); | |
106 | } | |
107 | ||
108 | DBG("<- move_device_tree\n"); | |
109 | } | |
9b6b563c | 110 | |
d205819e PM |
111 | /* |
112 | * ibm,pa-features is a per-cpu property that contains a string of | |
113 | * attribute descriptors, each of which has a 2 byte header plus up | |
114 | * to 254 bytes worth of processor attribute bits. First header | |
115 | * byte specifies the number of bytes following the header. | |
116 | * Second header byte is an "attribute-specifier" type, of which | |
117 | * zero is the only currently-defined value. | |
118 | * Implementation: Pass in the byte and bit offset for the feature | |
119 | * that we are interested in. The function will return -1 if the | |
120 | * pa-features property is missing, or a 1/0 to indicate if the feature | |
121 | * is supported/not supported. Note that the bit numbers are | |
122 | * big-endian to match the definition in PAPR. | |
123 | */ | |
124 | static struct ibm_pa_feature { | |
125 | unsigned long cpu_features; /* CPU_FTR_xxx bit */ | |
126 | unsigned int cpu_user_ftrs; /* PPC_FEATURE_xxx bit */ | |
127 | unsigned char pabyte; /* byte number in ibm,pa-features */ | |
128 | unsigned char pabit; /* bit number (big-endian) */ | |
129 | unsigned char invert; /* if 1, pa bit set => clear feature */ | |
130 | } ibm_pa_features[] __initdata = { | |
131 | {0, PPC_FEATURE_HAS_MMU, 0, 0, 0}, | |
132 | {0, PPC_FEATURE_HAS_FPU, 0, 1, 0}, | |
133 | {CPU_FTR_SLB, 0, 0, 2, 0}, | |
134 | {CPU_FTR_CTRL, 0, 0, 3, 0}, | |
135 | {CPU_FTR_NOEXECUTE, 0, 0, 6, 0}, | |
136 | {CPU_FTR_NODSISRALIGN, 0, 1, 1, 1}, | |
137 | {CPU_FTR_CI_LARGE_PAGE, 0, 1, 2, 0}, | |
339d76c5 | 138 | {CPU_FTR_REAL_LE, PPC_FEATURE_TRUE_LE, 5, 0, 0}, |
d205819e PM |
139 | }; |
140 | ||
974a76f5 PM |
141 | static void __init scan_features(unsigned long node, unsigned char *ftrs, |
142 | unsigned long tablelen, | |
143 | struct ibm_pa_feature *fp, | |
144 | unsigned long ft_size) | |
d205819e | 145 | { |
974a76f5 | 146 | unsigned long i, len, bit; |
d205819e PM |
147 | |
148 | /* find descriptor with type == 0 */ | |
149 | for (;;) { | |
150 | if (tablelen < 3) | |
151 | return; | |
974a76f5 | 152 | len = 2 + ftrs[0]; |
d205819e PM |
153 | if (tablelen < len) |
154 | return; /* descriptor 0 not found */ | |
974a76f5 | 155 | if (ftrs[1] == 0) |
d205819e PM |
156 | break; |
157 | tablelen -= len; | |
974a76f5 | 158 | ftrs += len; |
d205819e PM |
159 | } |
160 | ||
161 | /* loop over bits we know about */ | |
974a76f5 PM |
162 | for (i = 0; i < ft_size; ++i, ++fp) { |
163 | if (fp->pabyte >= ftrs[0]) | |
d205819e | 164 | continue; |
974a76f5 | 165 | bit = (ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1; |
d205819e PM |
166 | if (bit ^ fp->invert) { |
167 | cur_cpu_spec->cpu_features |= fp->cpu_features; | |
168 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs; | |
169 | } else { | |
170 | cur_cpu_spec->cpu_features &= ~fp->cpu_features; | |
171 | cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs; | |
172 | } | |
173 | } | |
174 | } | |
175 | ||
974a76f5 PM |
176 | static void __init check_cpu_pa_features(unsigned long node) |
177 | { | |
178 | unsigned char *pa_ftrs; | |
179 | unsigned long tablelen; | |
180 | ||
181 | pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen); | |
182 | if (pa_ftrs == NULL) | |
183 | return; | |
184 | ||
185 | scan_features(node, pa_ftrs, tablelen, | |
186 | ibm_pa_features, ARRAY_SIZE(ibm_pa_features)); | |
187 | } | |
188 | ||
94491685 | 189 | #ifdef CONFIG_PPC_STD_MMU_64 |
584f8b71 MN |
190 | static void __init check_cpu_slb_size(unsigned long node) |
191 | { | |
192 | u32 *slb_size_ptr; | |
193 | ||
b60c31d8 MN |
194 | slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL); |
195 | if (slb_size_ptr != NULL) { | |
196 | mmu_slb_size = *slb_size_ptr; | |
197 | return; | |
198 | } | |
584f8b71 MN |
199 | slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL); |
200 | if (slb_size_ptr != NULL) { | |
201 | mmu_slb_size = *slb_size_ptr; | |
202 | } | |
203 | } | |
204 | #else | |
205 | #define check_cpu_slb_size(node) do { } while(0) | |
206 | #endif | |
207 | ||
974a76f5 PM |
208 | static struct feature_property { |
209 | const char *name; | |
210 | u32 min_value; | |
211 | unsigned long cpu_feature; | |
212 | unsigned long cpu_user_ftr; | |
213 | } feature_properties[] __initdata = { | |
214 | #ifdef CONFIG_ALTIVEC | |
215 | {"altivec", 0, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
216 | {"ibm,vmx", 1, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
217 | #endif /* CONFIG_ALTIVEC */ | |
b962ce9d MN |
218 | #ifdef CONFIG_VSX |
219 | /* Yes, this _really_ is ibm,vmx == 2 to enable VSX */ | |
220 | {"ibm,vmx", 2, CPU_FTR_VSX, PPC_FEATURE_HAS_VSX}, | |
221 | #endif /* CONFIG_VSX */ | |
974a76f5 PM |
222 | #ifdef CONFIG_PPC64 |
223 | {"ibm,dfp", 1, 0, PPC_FEATURE_HAS_DFP}, | |
224 | {"ibm,purr", 1, CPU_FTR_PURR, 0}, | |
225 | {"ibm,spurr", 1, CPU_FTR_SPURR, 0}, | |
226 | #endif /* CONFIG_PPC64 */ | |
227 | }; | |
228 | ||
14b3d926 VB |
229 | #if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU) |
230 | static inline void identical_pvr_fixup(unsigned long node) | |
231 | { | |
232 | unsigned int pvr; | |
233 | char *model = of_get_flat_dt_prop(node, "model", NULL); | |
234 | ||
235 | /* | |
236 | * Since 440GR(x)/440EP(x) processors have the same pvr, | |
237 | * we check the node path and set bit 28 in the cur_cpu_spec | |
238 | * pvr for EP(x) processor version. This bit is always 0 in | |
239 | * the "real" pvr. Then we call identify_cpu again with | |
240 | * the new logical pvr to enable FPU support. | |
241 | */ | |
242 | if (model && strstr(model, "440EP")) { | |
243 | pvr = cur_cpu_spec->pvr_value | 0x8; | |
244 | identify_cpu(0, pvr); | |
245 | DBG("Using logical pvr %x for %s\n", pvr, model); | |
246 | } | |
247 | } | |
248 | #else | |
249 | #define identical_pvr_fixup(node) do { } while(0) | |
250 | #endif | |
251 | ||
974a76f5 PM |
252 | static void __init check_cpu_feature_properties(unsigned long node) |
253 | { | |
254 | unsigned long i; | |
255 | struct feature_property *fp = feature_properties; | |
256 | const u32 *prop; | |
257 | ||
258 | for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) { | |
259 | prop = of_get_flat_dt_prop(node, fp->name, NULL); | |
260 | if (prop && *prop >= fp->min_value) { | |
261 | cur_cpu_spec->cpu_features |= fp->cpu_feature; | |
262 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr; | |
263 | } | |
264 | } | |
265 | } | |
266 | ||
9b6b563c | 267 | static int __init early_init_dt_scan_cpus(unsigned long node, |
4df20460 AB |
268 | const char *uname, int depth, |
269 | void *data) | |
9b6b563c | 270 | { |
4df20460 AB |
271 | static int logical_cpuid = 0; |
272 | char *type = of_get_flat_dt_prop(node, "device_type", NULL); | |
974a76f5 PM |
273 | const u32 *prop; |
274 | const u32 *intserv; | |
4df20460 AB |
275 | int i, nthreads; |
276 | unsigned long len; | |
277 | int found = 0; | |
9b6b563c PM |
278 | |
279 | /* We are scanning "cpu" nodes only */ | |
280 | if (type == NULL || strcmp(type, "cpu") != 0) | |
281 | return 0; | |
282 | ||
4df20460 AB |
283 | /* Get physical cpuid */ |
284 | intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len); | |
285 | if (intserv) { | |
286 | nthreads = len / sizeof(int); | |
9b6b563c | 287 | } else { |
4df20460 AB |
288 | intserv = of_get_flat_dt_prop(node, "reg", NULL); |
289 | nthreads = 1; | |
290 | } | |
291 | ||
292 | /* | |
293 | * Now see if any of these threads match our boot cpu. | |
294 | * NOTE: This must match the parsing done in smp_setup_cpu_maps. | |
295 | */ | |
296 | for (i = 0; i < nthreads; i++) { | |
297 | /* | |
298 | * version 2 of the kexec param format adds the phys cpuid of | |
299 | * booted proc. | |
300 | */ | |
301 | if (initial_boot_params && initial_boot_params->version >= 2) { | |
302 | if (intserv[i] == | |
303 | initial_boot_params->boot_cpuid_phys) { | |
304 | found = 1; | |
305 | break; | |
306 | } | |
307 | } else { | |
308 | /* | |
309 | * Check if it's the boot-cpu, set it's hw index now, | |
310 | * unfortunately this format did not support booting | |
311 | * off secondary threads. | |
312 | */ | |
313 | if (of_get_flat_dt_prop(node, | |
3c726f8d | 314 | "linux,boot-cpu", NULL) != NULL) { |
4df20460 AB |
315 | found = 1; |
316 | break; | |
317 | } | |
9b6b563c | 318 | } |
4df20460 AB |
319 | |
320 | #ifdef CONFIG_SMP | |
321 | /* logical cpu id is always 0 on UP kernels */ | |
322 | logical_cpuid++; | |
323 | #endif | |
324 | } | |
325 | ||
326 | if (found) { | |
327 | DBG("boot cpu: logical %d physical %d\n", logical_cpuid, | |
328 | intserv[i]); | |
329 | boot_cpuid = logical_cpuid; | |
330 | set_hard_smp_processor_id(boot_cpuid, intserv[i]); | |
9b6b563c | 331 | |
974a76f5 PM |
332 | /* |
333 | * PAPR defines "logical" PVR values for cpus that | |
334 | * meet various levels of the architecture: | |
335 | * 0x0f000001 Architecture version 2.04 | |
336 | * 0x0f000002 Architecture version 2.05 | |
337 | * If the cpu-version property in the cpu node contains | |
338 | * such a value, we call identify_cpu again with the | |
339 | * logical PVR value in order to use the cpu feature | |
340 | * bits appropriate for the architecture level. | |
341 | * | |
342 | * A POWER6 partition in "POWER6 architected" mode | |
343 | * uses the 0x0f000002 PVR value; in POWER5+ mode | |
344 | * it uses 0x0f000001. | |
345 | */ | |
346 | prop = of_get_flat_dt_prop(node, "cpu-version", NULL); | |
347 | if (prop && (*prop & 0xff000000) == 0x0f000000) | |
348 | identify_cpu(0, *prop); | |
14b3d926 VB |
349 | |
350 | identical_pvr_fixup(node); | |
9b6b563c | 351 | } |
9b6b563c | 352 | |
974a76f5 | 353 | check_cpu_feature_properties(node); |
d205819e | 354 | check_cpu_pa_features(node); |
584f8b71 | 355 | check_cpu_slb_size(node); |
d205819e | 356 | |
9b6b563c | 357 | #ifdef CONFIG_PPC_PSERIES |
4df20460 | 358 | if (nthreads > 1) |
9b6b563c | 359 | cur_cpu_spec->cpu_features |= CPU_FTR_SMT; |
4df20460 AB |
360 | else |
361 | cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT; | |
9b6b563c PM |
362 | #endif |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
32c97689 GL |
367 | int __init early_init_dt_scan_chosen_ppc(unsigned long node, const char *uname, |
368 | int depth, void *data) | |
9b6b563c | 369 | { |
9b6b563c | 370 | unsigned long *lprop; |
9b6b563c | 371 | |
32c97689 GL |
372 | /* Use common scan routine to determine if this is the chosen node */ |
373 | if (early_init_dt_scan_chosen(node, uname, depth, data) == 0) | |
374 | return 0; | |
375 | ||
9b6b563c PM |
376 | #ifdef CONFIG_PPC64 |
377 | /* check if iommu is forced on or off */ | |
3c726f8d | 378 | if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL) |
9b6b563c | 379 | iommu_is_off = 1; |
3c726f8d | 380 | if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL) |
9b6b563c PM |
381 | iommu_force_on = 1; |
382 | #endif | |
383 | ||
2babf5c2 | 384 | /* mem=x on the command line is the preferred mechanism */ |
86e03221 GL |
385 | lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL); |
386 | if (lprop) | |
387 | memory_limit = *lprop; | |
9b6b563c PM |
388 | |
389 | #ifdef CONFIG_PPC64 | |
86e03221 GL |
390 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL); |
391 | if (lprop) | |
392 | tce_alloc_start = *lprop; | |
393 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL); | |
394 | if (lprop) | |
395 | tce_alloc_end = *lprop; | |
9b6b563c PM |
396 | #endif |
397 | ||
dcee3036 | 398 | #ifdef CONFIG_KEXEC |
63277161 | 399 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL); |
70c6cc37 LV |
400 | if (lprop) |
401 | crashk_res.start = *lprop; | |
dcee3036 | 402 | |
63277161 | 403 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL); |
70c6cc37 LV |
404 | if (lprop) |
405 | crashk_res.end = crashk_res.start + *lprop - 1; | |
dcee3036 | 406 | #endif |
32c97689 GL |
407 | |
408 | /* break now */ | |
409 | return 1; | |
9b6b563c PM |
410 | } |
411 | ||
0204568a PM |
412 | #ifdef CONFIG_PPC_PSERIES |
413 | /* | |
414 | * Interpret the ibm,dynamic-memory property in the | |
415 | * /ibm,dynamic-reconfiguration-memory node. | |
416 | * This contains a list of memory blocks along with NUMA affinity | |
417 | * information. | |
418 | */ | |
419 | static int __init early_init_dt_scan_drconf_memory(unsigned long node) | |
420 | { | |
0f0b56c3 | 421 | __be32 *dm, *ls, *usm; |
abe76885 | 422 | unsigned long l, n, flags; |
95f72d1e | 423 | u64 base, size, memblock_size; |
cf00085d | 424 | unsigned int is_kexec_kdump = 0, rngs; |
0204568a | 425 | |
3fdfd990 | 426 | ls = of_get_flat_dt_prop(node, "ibm,lmb-size", &l); |
0f0b56c3 | 427 | if (ls == NULL || l < dt_root_size_cells * sizeof(__be32)) |
0204568a | 428 | return 0; |
95f72d1e | 429 | memblock_size = dt_mem_next_cell(dt_root_size_cells, &ls); |
0204568a | 430 | |
63277161 | 431 | dm = of_get_flat_dt_prop(node, "ibm,dynamic-memory", &l); |
0f0b56c3 | 432 | if (dm == NULL || l < sizeof(__be32)) |
0204568a PM |
433 | return 0; |
434 | ||
435 | n = *dm++; /* number of entries */ | |
0f0b56c3 | 436 | if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(__be32)) |
0204568a PM |
437 | return 0; |
438 | ||
cf00085d | 439 | /* check if this is a kexec/kdump kernel. */ |
63277161 | 440 | usm = of_get_flat_dt_prop(node, "linux,drconf-usable-memory", |
cf00085d C |
441 | &l); |
442 | if (usm != NULL) | |
443 | is_kexec_kdump = 1; | |
444 | ||
0204568a PM |
445 | for (; n != 0; --n) { |
446 | base = dt_mem_next_cell(dt_root_addr_cells, &dm); | |
447 | flags = dm[3]; | |
448 | /* skip DRC index, pad, assoc. list index, flags */ | |
449 | dm += 4; | |
450 | /* skip this block if the reserved bit is set in flags (0x80) | |
451 | or if the block is not assigned to this partition (0x8) */ | |
452 | if ((flags & 0x80) || !(flags & 0x8)) | |
453 | continue; | |
95f72d1e | 454 | size = memblock_size; |
cf00085d C |
455 | rngs = 1; |
456 | if (is_kexec_kdump) { | |
457 | /* | |
95f72d1e | 458 | * For each memblock in ibm,dynamic-memory, a corresponding |
cf00085d C |
459 | * entry in linux,drconf-usable-memory property contains |
460 | * a counter 'p' followed by 'p' (base, size) duple. | |
461 | * Now read the counter from | |
462 | * linux,drconf-usable-memory property | |
463 | */ | |
464 | rngs = dt_mem_next_cell(dt_root_size_cells, &usm); | |
465 | if (!rngs) /* there are no (base, size) duple */ | |
0204568a | 466 | continue; |
0204568a | 467 | } |
cf00085d C |
468 | do { |
469 | if (is_kexec_kdump) { | |
470 | base = dt_mem_next_cell(dt_root_addr_cells, | |
471 | &usm); | |
472 | size = dt_mem_next_cell(dt_root_size_cells, | |
473 | &usm); | |
474 | } | |
475 | if (iommu_is_off) { | |
476 | if (base >= 0x80000000ul) | |
477 | continue; | |
478 | if ((base + size) > 0x80000000ul) | |
479 | size = 0x80000000ul - base; | |
480 | } | |
95f72d1e | 481 | memblock_add(base, size); |
cf00085d | 482 | } while (--rngs); |
0204568a | 483 | } |
95f72d1e | 484 | memblock_dump_all(); |
0204568a PM |
485 | return 0; |
486 | } | |
487 | #else | |
488 | #define early_init_dt_scan_drconf_memory(node) 0 | |
489 | #endif /* CONFIG_PPC_PSERIES */ | |
9b6b563c | 490 | |
51975db0 GL |
491 | static int __init early_init_dt_scan_memory_ppc(unsigned long node, |
492 | const char *uname, | |
493 | int depth, void *data) | |
9b6b563c | 494 | { |
0204568a PM |
495 | if (depth == 1 && |
496 | strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0) | |
497 | return early_init_dt_scan_drconf_memory(node); | |
51975db0 GL |
498 | |
499 | return early_init_dt_scan_memory(node, uname, depth, data); | |
500 | } | |
0204568a | 501 | |
51975db0 GL |
502 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) |
503 | { | |
cd3db0c4 | 504 | #ifdef CONFIG_PPC64 |
51975db0 GL |
505 | if (iommu_is_off) { |
506 | if (base >= 0x80000000ul) | |
507 | return; | |
508 | if ((base + size) > 0x80000000ul) | |
509 | size = 0x80000000ul - base; | |
510 | } | |
9b6b563c | 511 | #endif |
37dd2bad | 512 | |
cd3db0c4 BH |
513 | /* First MEMBLOCK added, do some special initializations */ |
514 | if (memstart_addr == ~(phys_addr_t)0) | |
515 | setup_initial_memory_limit(base, size); | |
51975db0 | 516 | memstart_addr = min((u64)memstart_addr, base); |
cd3db0c4 BH |
517 | |
518 | /* Add the chunk to the MEMBLOCK list */ | |
519 | memblock_add(base, size); | |
9b6b563c PM |
520 | } |
521 | ||
672c5446 | 522 | void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) |
4ef7b373 | 523 | { |
672c5446 | 524 | return __va(memblock_alloc(size, align)); |
4ef7b373 JK |
525 | } |
526 | ||
1406bc2f JK |
527 | #ifdef CONFIG_BLK_DEV_INITRD |
528 | void __init early_init_dt_setup_initrd_arch(unsigned long start, | |
529 | unsigned long end) | |
530 | { | |
531 | initrd_start = (unsigned long)__va(start); | |
532 | initrd_end = (unsigned long)__va(end); | |
533 | initrd_below_start_ok = 1; | |
534 | } | |
535 | #endif | |
536 | ||
9b6b563c PM |
537 | static void __init early_reserve_mem(void) |
538 | { | |
cbbcf340 KG |
539 | u64 base, size; |
540 | u64 *reserve_map; | |
8a300887 JL |
541 | unsigned long self_base; |
542 | unsigned long self_size; | |
9b6b563c | 543 | |
cbbcf340 | 544 | reserve_map = (u64 *)(((unsigned long)initial_boot_params) + |
9b6b563c | 545 | initial_boot_params->off_mem_rsvmap); |
4d1f3f25 JX |
546 | |
547 | /* before we do anything, lets reserve the dt blob */ | |
8a300887 JL |
548 | self_base = __pa((unsigned long)initial_boot_params); |
549 | self_size = initial_boot_params->totalsize; | |
95f72d1e | 550 | memblock_reserve(self_base, self_size); |
4d1f3f25 | 551 | |
30437b3e DG |
552 | #ifdef CONFIG_BLK_DEV_INITRD |
553 | /* then reserve the initrd, if any */ | |
554 | if (initrd_start && (initrd_end > initrd_start)) | |
95f72d1e | 555 | memblock_reserve(__pa(initrd_start), initrd_end - initrd_start); |
30437b3e DG |
556 | #endif /* CONFIG_BLK_DEV_INITRD */ |
557 | ||
cbbcf340 KG |
558 | #ifdef CONFIG_PPC32 |
559 | /* | |
560 | * Handle the case where we might be booting from an old kexec | |
561 | * image that setup the mem_rsvmap as pairs of 32-bit values | |
562 | */ | |
563 | if (*reserve_map > 0xffffffffull) { | |
564 | u32 base_32, size_32; | |
565 | u32 *reserve_map_32 = (u32 *)reserve_map; | |
566 | ||
567 | while (1) { | |
568 | base_32 = *(reserve_map_32++); | |
569 | size_32 = *(reserve_map_32++); | |
570 | if (size_32 == 0) | |
571 | break; | |
8a300887 JL |
572 | /* skip if the reservation is for the blob */ |
573 | if (base_32 == self_base && size_32 == self_size) | |
574 | continue; | |
329dda08 | 575 | DBG("reserving: %x -> %x\n", base_32, size_32); |
95f72d1e | 576 | memblock_reserve(base_32, size_32); |
cbbcf340 KG |
577 | } |
578 | return; | |
579 | } | |
580 | #endif | |
9b6b563c PM |
581 | while (1) { |
582 | base = *(reserve_map++); | |
583 | size = *(reserve_map++); | |
584 | if (size == 0) | |
585 | break; | |
cbbcf340 | 586 | DBG("reserving: %llx -> %llx\n", base, size); |
95f72d1e | 587 | memblock_reserve(base, size); |
9b6b563c | 588 | } |
9b6b563c PM |
589 | } |
590 | ||
6ac26c8a | 591 | #ifdef CONFIG_PHYP_DUMP |
37ddd5d0 MA |
592 | /** |
593 | * phyp_dump_calculate_reserve_size() - reserve variable boot area 5% or arg | |
594 | * | |
595 | * Function to find the largest size we need to reserve | |
596 | * during early boot process. | |
597 | * | |
598 | * It either looks for boot param and returns that OR | |
599 | * returns larger of 256 or 5% rounded down to multiples of 256MB. | |
600 | * | |
601 | */ | |
602 | static inline unsigned long phyp_dump_calculate_reserve_size(void) | |
603 | { | |
604 | unsigned long tmp; | |
605 | ||
606 | if (phyp_dump_info->reserve_bootvar) | |
607 | return phyp_dump_info->reserve_bootvar; | |
608 | ||
609 | /* divide by 20 to get 5% of value */ | |
95f72d1e | 610 | tmp = memblock_end_of_DRAM(); |
37ddd5d0 MA |
611 | do_div(tmp, 20); |
612 | ||
613 | /* round it down in multiples of 256 */ | |
614 | tmp = tmp & ~0x0FFFFFFFUL; | |
615 | ||
616 | return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END); | |
617 | } | |
618 | ||
6ac26c8a MA |
619 | /** |
620 | * phyp_dump_reserve_mem() - reserve all not-yet-dumped mmemory | |
621 | * | |
622 | * This routine may reserve memory regions in the kernel only | |
623 | * if the system is supported and a dump was taken in last | |
624 | * boot instance or if the hardware is supported and the | |
625 | * scratch area needs to be setup. In other instances it returns | |
626 | * without reserving anything. The memory in case of dump being | |
627 | * active is freed when the dump is collected (by userland tools). | |
628 | */ | |
629 | static void __init phyp_dump_reserve_mem(void) | |
630 | { | |
631 | unsigned long base, size; | |
37ddd5d0 MA |
632 | unsigned long variable_reserve_size; |
633 | ||
6ac26c8a MA |
634 | if (!phyp_dump_info->phyp_dump_configured) { |
635 | printk(KERN_ERR "Phyp-dump not supported on this hardware\n"); | |
636 | return; | |
637 | } | |
638 | ||
654f596d MA |
639 | if (!phyp_dump_info->phyp_dump_at_boot) { |
640 | printk(KERN_INFO "Phyp-dump disabled at boot time\n"); | |
641 | return; | |
642 | } | |
643 | ||
37ddd5d0 MA |
644 | variable_reserve_size = phyp_dump_calculate_reserve_size(); |
645 | ||
6ac26c8a MA |
646 | if (phyp_dump_info->phyp_dump_is_active) { |
647 | /* Reserve *everything* above RMR.Area freed by userland tools*/ | |
37ddd5d0 | 648 | base = variable_reserve_size; |
95f72d1e | 649 | size = memblock_end_of_DRAM() - base; |
6ac26c8a MA |
650 | |
651 | /* XXX crashed_ram_end is wrong, since it may be beyond | |
652 | * the memory_limit, it will need to be adjusted. */ | |
95f72d1e | 653 | memblock_reserve(base, size); |
6ac26c8a MA |
654 | |
655 | phyp_dump_info->init_reserve_start = base; | |
656 | phyp_dump_info->init_reserve_size = size; | |
657 | } else { | |
658 | size = phyp_dump_info->cpu_state_size + | |
659 | phyp_dump_info->hpte_region_size + | |
37ddd5d0 | 660 | variable_reserve_size; |
95f72d1e YL |
661 | base = memblock_end_of_DRAM() - size; |
662 | memblock_reserve(base, size); | |
6ac26c8a MA |
663 | phyp_dump_info->init_reserve_start = base; |
664 | phyp_dump_info->init_reserve_size = size; | |
665 | } | |
666 | } | |
667 | #else | |
668 | static inline void __init phyp_dump_reserve_mem(void) {} | |
669 | #endif /* CONFIG_PHYP_DUMP && CONFIG_PPC_RTAS */ | |
670 | ||
9b6b563c PM |
671 | void __init early_init_devtree(void *params) |
672 | { | |
49a84965 | 673 | phys_addr_t limit; |
6ca4f749 | 674 | |
44348105 | 675 | DBG(" -> early_init_devtree(%p)\n", params); |
9b6b563c PM |
676 | |
677 | /* Setup flat device-tree pointer */ | |
678 | initial_boot_params = params; | |
679 | ||
458148c0 ME |
680 | #ifdef CONFIG_PPC_RTAS |
681 | /* Some machines might need RTAS info for debugging, grab it now. */ | |
682 | of_scan_flat_dt(early_init_dt_scan_rtas, NULL); | |
683 | #endif | |
684 | ||
6ac26c8a MA |
685 | #ifdef CONFIG_PHYP_DUMP |
686 | /* scan tree to see if dump occured during last boot */ | |
687 | of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL); | |
688 | #endif | |
689 | ||
9b6b563c PM |
690 | /* Retrieve various informations from the /chosen node of the |
691 | * device-tree, including the platform type, initrd location and | |
692 | * size, TCE reserve, and more ... | |
693 | */ | |
32c97689 | 694 | of_scan_flat_dt(early_init_dt_scan_chosen_ppc, NULL); |
9b6b563c | 695 | |
95f72d1e YL |
696 | /* Scan memory nodes and rebuild MEMBLOCKs */ |
697 | memblock_init(); | |
e63075a3 | 698 | |
3c726f8d | 699 | of_scan_flat_dt(early_init_dt_scan_root, NULL); |
51975db0 | 700 | of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); |
846f77b0 ME |
701 | |
702 | /* Save command line for /proc/cmdline and then parse parameters */ | |
b8757b21 | 703 | strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); |
846f77b0 ME |
704 | parse_early_param(); |
705 | ||
95f72d1e YL |
706 | /* Reserve MEMBLOCK regions used by kernel, initrd, dt, etc... */ |
707 | memblock_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); | |
549e8152 PM |
708 | /* If relocatable, reserve first 32k for interrupt vectors etc. */ |
709 | if (PHYSICAL_START > MEMORY_START) | |
95f72d1e | 710 | memblock_reserve(MEMORY_START, 0x8000); |
47310413 | 711 | reserve_kdump_trampoline(); |
35dd5432 | 712 | reserve_crashkernel(); |
9b6b563c | 713 | early_reserve_mem(); |
6ac26c8a | 714 | phyp_dump_reserve_mem(); |
9b6b563c | 715 | |
6ca4f749 HB |
716 | limit = memory_limit; |
717 | if (! limit) { | |
49a84965 | 718 | phys_addr_t memsize; |
6ca4f749 HB |
719 | |
720 | /* Ensure that total memory size is page-aligned, because | |
721 | * otherwise mark_bootmem() gets upset. */ | |
95f72d1e YL |
722 | memblock_analyze(); |
723 | memsize = memblock_phys_mem_size(); | |
6ca4f749 HB |
724 | if ((memsize & PAGE_MASK) != memsize) |
725 | limit = memsize & PAGE_MASK; | |
726 | } | |
95f72d1e | 727 | memblock_enforce_memory_limit(limit); |
6ca4f749 | 728 | |
95f72d1e YL |
729 | memblock_analyze(); |
730 | memblock_dump_all(); | |
2babf5c2 | 731 | |
95f72d1e | 732 | DBG("Phys. mem: %llx\n", memblock_phys_mem_size()); |
2babf5c2 ME |
733 | |
734 | /* We may need to relocate the flat tree, do it now. | |
735 | * FIXME .. and the initrd too? */ | |
736 | move_device_tree(); | |
737 | ||
1426d5a3 ME |
738 | allocate_pacas(); |
739 | ||
9b6b563c PM |
740 | DBG("Scanning CPUs ...\n"); |
741 | ||
3c726f8d BH |
742 | /* Retreive CPU related informations from the flat tree |
743 | * (altivec support, boot CPU ID, ...) | |
9b6b563c | 744 | */ |
3c726f8d | 745 | of_scan_flat_dt(early_init_dt_scan_cpus, NULL); |
9b6b563c | 746 | |
9b6b563c PM |
747 | DBG(" <- early_init_devtree()\n"); |
748 | } | |
749 | ||
9b6b563c PM |
750 | /******* |
751 | * | |
752 | * New implementation of the OF "find" APIs, return a refcounted | |
753 | * object, call of_node_put() when done. The device tree and list | |
754 | * are protected by a rw_lock. | |
755 | * | |
756 | * Note that property management will need some locking as well, | |
757 | * this isn't dealt with yet. | |
758 | * | |
759 | *******/ | |
760 | ||
e523f723 NL |
761 | /** |
762 | * of_find_next_cache_node - Find a node's subsidiary cache | |
763 | * @np: node of type "cpu" or "cache" | |
764 | * | |
765 | * Returns a node pointer with refcount incremented, use | |
766 | * of_node_put() on it when done. Caller should hold a reference | |
767 | * to np. | |
768 | */ | |
769 | struct device_node *of_find_next_cache_node(struct device_node *np) | |
770 | { | |
771 | struct device_node *child; | |
772 | const phandle *handle; | |
773 | ||
774 | handle = of_get_property(np, "l2-cache", NULL); | |
775 | if (!handle) | |
776 | handle = of_get_property(np, "next-level-cache", NULL); | |
777 | ||
778 | if (handle) | |
779 | return of_find_node_by_phandle(*handle); | |
780 | ||
781 | /* OF on pmac has nodes instead of properties named "l2-cache" | |
782 | * beneath CPU nodes. | |
783 | */ | |
784 | if (!strcmp(np->type, "cpu")) | |
785 | for_each_child_of_node(np, child) | |
786 | if (!strcmp(child->type, "cache")) | |
787 | return child; | |
788 | ||
789 | return NULL; | |
790 | } | |
791 | ||
9b6b563c PM |
792 | #ifdef CONFIG_PPC_PSERIES |
793 | /* | |
794 | * Fix up the uninitialized fields in a new device node: | |
0ebfff14 | 795 | * name, type and pci-specific fields |
9b6b563c PM |
796 | */ |
797 | ||
cc5d0189 | 798 | static int of_finish_dynamic_node(struct device_node *node) |
9b6b563c PM |
799 | { |
800 | struct device_node *parent = of_get_parent(node); | |
801 | int err = 0; | |
a7f67bdf | 802 | const phandle *ibm_phandle; |
9b6b563c | 803 | |
0e56efc7 SR |
804 | node->name = of_get_property(node, "name", NULL); |
805 | node->type = of_get_property(node, "device_type", NULL); | |
9b6b563c | 806 | |
847f5976 BH |
807 | if (!node->name) |
808 | node->name = "<NULL>"; | |
809 | if (!node->type) | |
810 | node->type = "<NULL>"; | |
811 | ||
9b6b563c PM |
812 | if (!parent) { |
813 | err = -ENODEV; | |
814 | goto out; | |
815 | } | |
816 | ||
817 | /* We don't support that function on PowerMac, at least | |
818 | * not yet | |
819 | */ | |
e8222502 | 820 | if (machine_is(powermac)) |
9b6b563c PM |
821 | return -ENODEV; |
822 | ||
6016a363 | 823 | /* fix up new node's phandle field */ |
0e56efc7 | 824 | if ((ibm_phandle = of_get_property(node, "ibm,phandle", NULL))) |
6016a363 | 825 | node->phandle = *ibm_phandle; |
9b6b563c PM |
826 | |
827 | out: | |
828 | of_node_put(parent); | |
829 | return err; | |
830 | } | |
831 | ||
832 | static int prom_reconfig_notifier(struct notifier_block *nb, | |
833 | unsigned long action, void *node) | |
834 | { | |
835 | int err; | |
836 | ||
837 | switch (action) { | |
838 | case PSERIES_RECONFIG_ADD: | |
cc5d0189 | 839 | err = of_finish_dynamic_node(node); |
9b6b563c PM |
840 | if (err < 0) { |
841 | printk(KERN_ERR "finish_node returned %d\n", err); | |
842 | err = NOTIFY_BAD; | |
843 | } | |
844 | break; | |
845 | default: | |
846 | err = NOTIFY_DONE; | |
847 | break; | |
848 | } | |
849 | return err; | |
850 | } | |
851 | ||
852 | static struct notifier_block prom_reconfig_nb = { | |
853 | .notifier_call = prom_reconfig_notifier, | |
854 | .priority = 10, /* This one needs to run first */ | |
855 | }; | |
856 | ||
857 | static int __init prom_reconfig_setup(void) | |
858 | { | |
859 | return pSeries_reconfig_notifier_register(&prom_reconfig_nb); | |
860 | } | |
861 | __initcall(prom_reconfig_setup); | |
862 | #endif | |
863 | ||
acf7d768 BH |
864 | /* Find the device node for a given logical cpu number, also returns the cpu |
865 | * local thread number (index in ibm,interrupt-server#s) if relevant and | |
866 | * asked for (non NULL) | |
867 | */ | |
868 | struct device_node *of_get_cpu_node(int cpu, unsigned int *thread) | |
869 | { | |
870 | int hardid; | |
871 | struct device_node *np; | |
872 | ||
873 | hardid = get_hard_smp_processor_id(cpu); | |
874 | ||
875 | for_each_node_by_type(np, "cpu") { | |
a7f67bdf | 876 | const u32 *intserv; |
acf7d768 BH |
877 | unsigned int plen, t; |
878 | ||
879 | /* Check for ibm,ppc-interrupt-server#s. If it doesn't exist | |
880 | * fallback to "reg" property and assume no threads | |
881 | */ | |
0e56efc7 | 882 | intserv = of_get_property(np, "ibm,ppc-interrupt-server#s", |
a7f67bdf | 883 | &plen); |
acf7d768 | 884 | if (intserv == NULL) { |
0e56efc7 | 885 | const u32 *reg = of_get_property(np, "reg", NULL); |
acf7d768 BH |
886 | if (reg == NULL) |
887 | continue; | |
888 | if (*reg == hardid) { | |
889 | if (thread) | |
890 | *thread = 0; | |
891 | return np; | |
892 | } | |
893 | } else { | |
894 | plen /= sizeof(u32); | |
895 | for (t = 0; t < plen; t++) { | |
896 | if (hardid == intserv[t]) { | |
897 | if (thread) | |
898 | *thread = t; | |
899 | return np; | |
900 | } | |
901 | } | |
902 | } | |
903 | } | |
904 | return NULL; | |
905 | } | |
36ca4ba4 | 906 | EXPORT_SYMBOL(of_get_cpu_node); |
7a4571ae | 907 | |
94a3807c | 908 | #if defined(CONFIG_DEBUG_FS) && defined(DEBUG) |
7a4571ae ME |
909 | static struct debugfs_blob_wrapper flat_dt_blob; |
910 | ||
911 | static int __init export_flat_device_tree(void) | |
912 | { | |
913 | struct dentry *d; | |
914 | ||
7a4571ae ME |
915 | flat_dt_blob.data = initial_boot_params; |
916 | flat_dt_blob.size = initial_boot_params->totalsize; | |
917 | ||
918 | d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR, | |
94a3807c | 919 | powerpc_debugfs_root, &flat_dt_blob); |
7a4571ae ME |
920 | if (!d) |
921 | return 1; | |
922 | ||
923 | return 0; | |
924 | } | |
925 | __initcall(export_flat_device_tree); | |
926 | #endif |