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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> |
d9b2b2a2 | 34 | #include <linux/lmb.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; |
9b6b563c PM |
69 | #endif |
70 | ||
2babf5c2 ME |
71 | static int __init early_parse_mem(char *p) |
72 | { | |
73 | if (!p) | |
74 | return 1; | |
75 | ||
76 | memory_limit = PAGE_ALIGN(memparse(p, &p)); | |
49a84965 | 77 | DBG("memory limit = 0x%llx\n", (unsigned long long)memory_limit); |
2babf5c2 ME |
78 | |
79 | return 0; | |
80 | } | |
81 | early_param("mem", early_parse_mem); | |
82 | ||
3c607ce2 LV |
83 | /** |
84 | * move_device_tree - move tree to an unused area, if needed. | |
85 | * | |
86 | * The device tree may be allocated beyond our memory limit, or inside the | |
87 | * crash kernel region for kdump. If so, move it out of the way. | |
2babf5c2 | 88 | */ |
18f032cb | 89 | static void __init move_device_tree(void) |
2babf5c2 ME |
90 | { |
91 | unsigned long start, size; | |
92 | void *p; | |
93 | ||
94 | DBG("-> move_device_tree\n"); | |
95 | ||
96 | start = __pa(initial_boot_params); | |
087f79c4 | 97 | size = be32_to_cpu(initial_boot_params->totalsize); |
2babf5c2 ME |
98 | |
99 | if ((memory_limit && (start + size) > memory_limit) || | |
100 | overlaps_crashkernel(start, size)) { | |
101 | p = __va(lmb_alloc_base(size, PAGE_SIZE, lmb.rmo_size)); | |
102 | memcpy(p, initial_boot_params, size); | |
103 | initial_boot_params = (struct boot_param_header *)p; | |
104 | DBG("Moved device tree to 0x%p\n", p); | |
105 | } | |
106 | ||
107 | DBG("<- move_device_tree\n"); | |
108 | } | |
9b6b563c | 109 | |
d205819e PM |
110 | /* |
111 | * ibm,pa-features is a per-cpu property that contains a string of | |
112 | * attribute descriptors, each of which has a 2 byte header plus up | |
113 | * to 254 bytes worth of processor attribute bits. First header | |
114 | * byte specifies the number of bytes following the header. | |
115 | * Second header byte is an "attribute-specifier" type, of which | |
116 | * zero is the only currently-defined value. | |
117 | * Implementation: Pass in the byte and bit offset for the feature | |
118 | * that we are interested in. The function will return -1 if the | |
119 | * pa-features property is missing, or a 1/0 to indicate if the feature | |
120 | * is supported/not supported. Note that the bit numbers are | |
121 | * big-endian to match the definition in PAPR. | |
122 | */ | |
123 | static struct ibm_pa_feature { | |
124 | unsigned long cpu_features; /* CPU_FTR_xxx bit */ | |
125 | unsigned int cpu_user_ftrs; /* PPC_FEATURE_xxx bit */ | |
126 | unsigned char pabyte; /* byte number in ibm,pa-features */ | |
127 | unsigned char pabit; /* bit number (big-endian) */ | |
128 | unsigned char invert; /* if 1, pa bit set => clear feature */ | |
129 | } ibm_pa_features[] __initdata = { | |
130 | {0, PPC_FEATURE_HAS_MMU, 0, 0, 0}, | |
131 | {0, PPC_FEATURE_HAS_FPU, 0, 1, 0}, | |
132 | {CPU_FTR_SLB, 0, 0, 2, 0}, | |
133 | {CPU_FTR_CTRL, 0, 0, 3, 0}, | |
134 | {CPU_FTR_NOEXECUTE, 0, 0, 6, 0}, | |
135 | {CPU_FTR_NODSISRALIGN, 0, 1, 1, 1}, | |
136 | {CPU_FTR_CI_LARGE_PAGE, 0, 1, 2, 0}, | |
339d76c5 | 137 | {CPU_FTR_REAL_LE, PPC_FEATURE_TRUE_LE, 5, 0, 0}, |
d205819e PM |
138 | }; |
139 | ||
974a76f5 PM |
140 | static void __init scan_features(unsigned long node, unsigned char *ftrs, |
141 | unsigned long tablelen, | |
142 | struct ibm_pa_feature *fp, | |
143 | unsigned long ft_size) | |
d205819e | 144 | { |
974a76f5 | 145 | unsigned long i, len, bit; |
d205819e PM |
146 | |
147 | /* find descriptor with type == 0 */ | |
148 | for (;;) { | |
149 | if (tablelen < 3) | |
150 | return; | |
974a76f5 | 151 | len = 2 + ftrs[0]; |
d205819e PM |
152 | if (tablelen < len) |
153 | return; /* descriptor 0 not found */ | |
974a76f5 | 154 | if (ftrs[1] == 0) |
d205819e PM |
155 | break; |
156 | tablelen -= len; | |
974a76f5 | 157 | ftrs += len; |
d205819e PM |
158 | } |
159 | ||
160 | /* loop over bits we know about */ | |
974a76f5 PM |
161 | for (i = 0; i < ft_size; ++i, ++fp) { |
162 | if (fp->pabyte >= ftrs[0]) | |
d205819e | 163 | continue; |
974a76f5 | 164 | bit = (ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1; |
d205819e PM |
165 | if (bit ^ fp->invert) { |
166 | cur_cpu_spec->cpu_features |= fp->cpu_features; | |
167 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs; | |
168 | } else { | |
169 | cur_cpu_spec->cpu_features &= ~fp->cpu_features; | |
170 | cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs; | |
171 | } | |
172 | } | |
173 | } | |
174 | ||
974a76f5 PM |
175 | static void __init check_cpu_pa_features(unsigned long node) |
176 | { | |
177 | unsigned char *pa_ftrs; | |
178 | unsigned long tablelen; | |
179 | ||
180 | pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen); | |
181 | if (pa_ftrs == NULL) | |
182 | return; | |
183 | ||
184 | scan_features(node, pa_ftrs, tablelen, | |
185 | ibm_pa_features, ARRAY_SIZE(ibm_pa_features)); | |
186 | } | |
187 | ||
94491685 | 188 | #ifdef CONFIG_PPC_STD_MMU_64 |
584f8b71 MN |
189 | static void __init check_cpu_slb_size(unsigned long node) |
190 | { | |
191 | u32 *slb_size_ptr; | |
192 | ||
b60c31d8 MN |
193 | slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL); |
194 | if (slb_size_ptr != NULL) { | |
195 | mmu_slb_size = *slb_size_ptr; | |
196 | return; | |
197 | } | |
584f8b71 MN |
198 | slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL); |
199 | if (slb_size_ptr != NULL) { | |
200 | mmu_slb_size = *slb_size_ptr; | |
201 | } | |
202 | } | |
203 | #else | |
204 | #define check_cpu_slb_size(node) do { } while(0) | |
205 | #endif | |
206 | ||
974a76f5 PM |
207 | static struct feature_property { |
208 | const char *name; | |
209 | u32 min_value; | |
210 | unsigned long cpu_feature; | |
211 | unsigned long cpu_user_ftr; | |
212 | } feature_properties[] __initdata = { | |
213 | #ifdef CONFIG_ALTIVEC | |
214 | {"altivec", 0, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
215 | {"ibm,vmx", 1, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
216 | #endif /* CONFIG_ALTIVEC */ | |
b962ce9d MN |
217 | #ifdef CONFIG_VSX |
218 | /* Yes, this _really_ is ibm,vmx == 2 to enable VSX */ | |
219 | {"ibm,vmx", 2, CPU_FTR_VSX, PPC_FEATURE_HAS_VSX}, | |
220 | #endif /* CONFIG_VSX */ | |
974a76f5 PM |
221 | #ifdef CONFIG_PPC64 |
222 | {"ibm,dfp", 1, 0, PPC_FEATURE_HAS_DFP}, | |
223 | {"ibm,purr", 1, CPU_FTR_PURR, 0}, | |
224 | {"ibm,spurr", 1, CPU_FTR_SPURR, 0}, | |
225 | #endif /* CONFIG_PPC64 */ | |
226 | }; | |
227 | ||
14b3d926 VB |
228 | #if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU) |
229 | static inline void identical_pvr_fixup(unsigned long node) | |
230 | { | |
231 | unsigned int pvr; | |
232 | char *model = of_get_flat_dt_prop(node, "model", NULL); | |
233 | ||
234 | /* | |
235 | * Since 440GR(x)/440EP(x) processors have the same pvr, | |
236 | * we check the node path and set bit 28 in the cur_cpu_spec | |
237 | * pvr for EP(x) processor version. This bit is always 0 in | |
238 | * the "real" pvr. Then we call identify_cpu again with | |
239 | * the new logical pvr to enable FPU support. | |
240 | */ | |
241 | if (model && strstr(model, "440EP")) { | |
242 | pvr = cur_cpu_spec->pvr_value | 0x8; | |
243 | identify_cpu(0, pvr); | |
244 | DBG("Using logical pvr %x for %s\n", pvr, model); | |
245 | } | |
246 | } | |
247 | #else | |
248 | #define identical_pvr_fixup(node) do { } while(0) | |
249 | #endif | |
250 | ||
974a76f5 PM |
251 | static void __init check_cpu_feature_properties(unsigned long node) |
252 | { | |
253 | unsigned long i; | |
254 | struct feature_property *fp = feature_properties; | |
255 | const u32 *prop; | |
256 | ||
257 | for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) { | |
258 | prop = of_get_flat_dt_prop(node, fp->name, NULL); | |
259 | if (prop && *prop >= fp->min_value) { | |
260 | cur_cpu_spec->cpu_features |= fp->cpu_feature; | |
261 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr; | |
262 | } | |
263 | } | |
264 | } | |
265 | ||
9b6b563c | 266 | static int __init early_init_dt_scan_cpus(unsigned long node, |
4df20460 AB |
267 | const char *uname, int depth, |
268 | void *data) | |
9b6b563c | 269 | { |
4df20460 AB |
270 | static int logical_cpuid = 0; |
271 | char *type = of_get_flat_dt_prop(node, "device_type", NULL); | |
974a76f5 PM |
272 | const u32 *prop; |
273 | const u32 *intserv; | |
4df20460 AB |
274 | int i, nthreads; |
275 | unsigned long len; | |
276 | int found = 0; | |
9b6b563c PM |
277 | |
278 | /* We are scanning "cpu" nodes only */ | |
279 | if (type == NULL || strcmp(type, "cpu") != 0) | |
280 | return 0; | |
281 | ||
4df20460 AB |
282 | /* Get physical cpuid */ |
283 | intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len); | |
284 | if (intserv) { | |
285 | nthreads = len / sizeof(int); | |
9b6b563c | 286 | } else { |
4df20460 AB |
287 | intserv = of_get_flat_dt_prop(node, "reg", NULL); |
288 | nthreads = 1; | |
289 | } | |
290 | ||
291 | /* | |
292 | * Now see if any of these threads match our boot cpu. | |
293 | * NOTE: This must match the parsing done in smp_setup_cpu_maps. | |
294 | */ | |
295 | for (i = 0; i < nthreads; i++) { | |
296 | /* | |
297 | * version 2 of the kexec param format adds the phys cpuid of | |
298 | * booted proc. | |
299 | */ | |
300 | if (initial_boot_params && initial_boot_params->version >= 2) { | |
301 | if (intserv[i] == | |
302 | initial_boot_params->boot_cpuid_phys) { | |
303 | found = 1; | |
304 | break; | |
305 | } | |
306 | } else { | |
307 | /* | |
308 | * Check if it's the boot-cpu, set it's hw index now, | |
309 | * unfortunately this format did not support booting | |
310 | * off secondary threads. | |
311 | */ | |
312 | if (of_get_flat_dt_prop(node, | |
3c726f8d | 313 | "linux,boot-cpu", NULL) != NULL) { |
4df20460 AB |
314 | found = 1; |
315 | break; | |
316 | } | |
9b6b563c | 317 | } |
4df20460 AB |
318 | |
319 | #ifdef CONFIG_SMP | |
320 | /* logical cpu id is always 0 on UP kernels */ | |
321 | logical_cpuid++; | |
322 | #endif | |
323 | } | |
324 | ||
325 | if (found) { | |
326 | DBG("boot cpu: logical %d physical %d\n", logical_cpuid, | |
327 | intserv[i]); | |
328 | boot_cpuid = logical_cpuid; | |
329 | set_hard_smp_processor_id(boot_cpuid, intserv[i]); | |
9b6b563c | 330 | |
974a76f5 PM |
331 | /* |
332 | * PAPR defines "logical" PVR values for cpus that | |
333 | * meet various levels of the architecture: | |
334 | * 0x0f000001 Architecture version 2.04 | |
335 | * 0x0f000002 Architecture version 2.05 | |
336 | * If the cpu-version property in the cpu node contains | |
337 | * such a value, we call identify_cpu again with the | |
338 | * logical PVR value in order to use the cpu feature | |
339 | * bits appropriate for the architecture level. | |
340 | * | |
341 | * A POWER6 partition in "POWER6 architected" mode | |
342 | * uses the 0x0f000002 PVR value; in POWER5+ mode | |
343 | * it uses 0x0f000001. | |
344 | */ | |
345 | prop = of_get_flat_dt_prop(node, "cpu-version", NULL); | |
346 | if (prop && (*prop & 0xff000000) == 0x0f000000) | |
347 | identify_cpu(0, *prop); | |
14b3d926 VB |
348 | |
349 | identical_pvr_fixup(node); | |
9b6b563c | 350 | } |
9b6b563c | 351 | |
974a76f5 | 352 | check_cpu_feature_properties(node); |
d205819e | 353 | check_cpu_pa_features(node); |
584f8b71 | 354 | check_cpu_slb_size(node); |
d205819e | 355 | |
9b6b563c | 356 | #ifdef CONFIG_PPC_PSERIES |
4df20460 | 357 | if (nthreads > 1) |
9b6b563c | 358 | cur_cpu_spec->cpu_features |= CPU_FTR_SMT; |
4df20460 AB |
359 | else |
360 | cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT; | |
9b6b563c PM |
361 | #endif |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
86e03221 | 366 | void __init early_init_dt_scan_chosen_arch(unsigned long node) |
9b6b563c | 367 | { |
9b6b563c | 368 | unsigned long *lprop; |
9b6b563c | 369 | |
9b6b563c PM |
370 | #ifdef CONFIG_PPC64 |
371 | /* check if iommu is forced on or off */ | |
3c726f8d | 372 | if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL) |
9b6b563c | 373 | iommu_is_off = 1; |
3c726f8d | 374 | if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL) |
9b6b563c PM |
375 | iommu_force_on = 1; |
376 | #endif | |
377 | ||
2babf5c2 | 378 | /* mem=x on the command line is the preferred mechanism */ |
86e03221 GL |
379 | lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL); |
380 | if (lprop) | |
381 | memory_limit = *lprop; | |
9b6b563c PM |
382 | |
383 | #ifdef CONFIG_PPC64 | |
86e03221 GL |
384 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL); |
385 | if (lprop) | |
386 | tce_alloc_start = *lprop; | |
387 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL); | |
388 | if (lprop) | |
389 | tce_alloc_end = *lprop; | |
9b6b563c PM |
390 | #endif |
391 | ||
dcee3036 | 392 | #ifdef CONFIG_KEXEC |
63277161 | 393 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL); |
70c6cc37 LV |
394 | if (lprop) |
395 | crashk_res.start = *lprop; | |
dcee3036 | 396 | |
63277161 | 397 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL); |
70c6cc37 LV |
398 | if (lprop) |
399 | crashk_res.end = crashk_res.start + *lprop - 1; | |
dcee3036 | 400 | #endif |
9b6b563c PM |
401 | } |
402 | ||
0204568a PM |
403 | #ifdef CONFIG_PPC_PSERIES |
404 | /* | |
405 | * Interpret the ibm,dynamic-memory property in the | |
406 | * /ibm,dynamic-reconfiguration-memory node. | |
407 | * This contains a list of memory blocks along with NUMA affinity | |
408 | * information. | |
409 | */ | |
410 | static int __init early_init_dt_scan_drconf_memory(unsigned long node) | |
411 | { | |
0f0b56c3 | 412 | __be32 *dm, *ls, *usm; |
abe76885 BB |
413 | unsigned long l, n, flags; |
414 | u64 base, size, lmb_size; | |
cf00085d | 415 | unsigned int is_kexec_kdump = 0, rngs; |
0204568a | 416 | |
63277161 | 417 | ls = of_get_flat_dt_prop(node, "ibm,lmb-size", &l); |
0f0b56c3 | 418 | if (ls == NULL || l < dt_root_size_cells * sizeof(__be32)) |
0204568a PM |
419 | return 0; |
420 | lmb_size = dt_mem_next_cell(dt_root_size_cells, &ls); | |
421 | ||
63277161 | 422 | dm = of_get_flat_dt_prop(node, "ibm,dynamic-memory", &l); |
0f0b56c3 | 423 | if (dm == NULL || l < sizeof(__be32)) |
0204568a PM |
424 | return 0; |
425 | ||
426 | n = *dm++; /* number of entries */ | |
0f0b56c3 | 427 | if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(__be32)) |
0204568a PM |
428 | return 0; |
429 | ||
cf00085d | 430 | /* check if this is a kexec/kdump kernel. */ |
63277161 | 431 | usm = of_get_flat_dt_prop(node, "linux,drconf-usable-memory", |
cf00085d C |
432 | &l); |
433 | if (usm != NULL) | |
434 | is_kexec_kdump = 1; | |
435 | ||
0204568a PM |
436 | for (; n != 0; --n) { |
437 | base = dt_mem_next_cell(dt_root_addr_cells, &dm); | |
438 | flags = dm[3]; | |
439 | /* skip DRC index, pad, assoc. list index, flags */ | |
440 | dm += 4; | |
441 | /* skip this block if the reserved bit is set in flags (0x80) | |
442 | or if the block is not assigned to this partition (0x8) */ | |
443 | if ((flags & 0x80) || !(flags & 0x8)) | |
444 | continue; | |
445 | size = lmb_size; | |
cf00085d C |
446 | rngs = 1; |
447 | if (is_kexec_kdump) { | |
448 | /* | |
449 | * For each lmb in ibm,dynamic-memory, a corresponding | |
450 | * entry in linux,drconf-usable-memory property contains | |
451 | * a counter 'p' followed by 'p' (base, size) duple. | |
452 | * Now read the counter from | |
453 | * linux,drconf-usable-memory property | |
454 | */ | |
455 | rngs = dt_mem_next_cell(dt_root_size_cells, &usm); | |
456 | if (!rngs) /* there are no (base, size) duple */ | |
0204568a | 457 | continue; |
0204568a | 458 | } |
cf00085d C |
459 | do { |
460 | if (is_kexec_kdump) { | |
461 | base = dt_mem_next_cell(dt_root_addr_cells, | |
462 | &usm); | |
463 | size = dt_mem_next_cell(dt_root_size_cells, | |
464 | &usm); | |
465 | } | |
466 | if (iommu_is_off) { | |
467 | if (base >= 0x80000000ul) | |
468 | continue; | |
469 | if ((base + size) > 0x80000000ul) | |
470 | size = 0x80000000ul - base; | |
471 | } | |
472 | lmb_add(base, size); | |
473 | } while (--rngs); | |
0204568a PM |
474 | } |
475 | lmb_dump_all(); | |
476 | return 0; | |
477 | } | |
478 | #else | |
479 | #define early_init_dt_scan_drconf_memory(node) 0 | |
480 | #endif /* CONFIG_PPC_PSERIES */ | |
9b6b563c | 481 | |
51975db0 GL |
482 | static int __init early_init_dt_scan_memory_ppc(unsigned long node, |
483 | const char *uname, | |
484 | int depth, void *data) | |
9b6b563c | 485 | { |
0204568a PM |
486 | if (depth == 1 && |
487 | strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0) | |
488 | return early_init_dt_scan_drconf_memory(node); | |
51975db0 GL |
489 | |
490 | return early_init_dt_scan_memory(node, uname, depth, data); | |
491 | } | |
0204568a | 492 | |
51975db0 GL |
493 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) |
494 | { | |
495 | #if defined(CONFIG_PPC64) | |
496 | if (iommu_is_off) { | |
497 | if (base >= 0x80000000ul) | |
498 | return; | |
499 | if ((base + size) > 0x80000000ul) | |
500 | size = 0x80000000ul - base; | |
501 | } | |
9b6b563c | 502 | #endif |
37dd2bad | 503 | |
51975db0 | 504 | lmb_add(base, size); |
37dd2bad | 505 | |
51975db0 | 506 | memstart_addr = min((u64)memstart_addr, base); |
9b6b563c PM |
507 | } |
508 | ||
4ef7b373 JK |
509 | u64 __init early_init_dt_alloc_memory_arch(u64 size, u64 align) |
510 | { | |
511 | return lmb_alloc(size, align); | |
512 | } | |
513 | ||
1406bc2f JK |
514 | #ifdef CONFIG_BLK_DEV_INITRD |
515 | void __init early_init_dt_setup_initrd_arch(unsigned long start, | |
516 | unsigned long end) | |
517 | { | |
518 | initrd_start = (unsigned long)__va(start); | |
519 | initrd_end = (unsigned long)__va(end); | |
520 | initrd_below_start_ok = 1; | |
521 | } | |
522 | #endif | |
523 | ||
9b6b563c PM |
524 | static void __init early_reserve_mem(void) |
525 | { | |
cbbcf340 KG |
526 | u64 base, size; |
527 | u64 *reserve_map; | |
8a300887 JL |
528 | unsigned long self_base; |
529 | unsigned long self_size; | |
9b6b563c | 530 | |
cbbcf340 | 531 | reserve_map = (u64 *)(((unsigned long)initial_boot_params) + |
9b6b563c | 532 | initial_boot_params->off_mem_rsvmap); |
4d1f3f25 JX |
533 | |
534 | /* before we do anything, lets reserve the dt blob */ | |
8a300887 JL |
535 | self_base = __pa((unsigned long)initial_boot_params); |
536 | self_size = initial_boot_params->totalsize; | |
537 | lmb_reserve(self_base, self_size); | |
4d1f3f25 | 538 | |
30437b3e DG |
539 | #ifdef CONFIG_BLK_DEV_INITRD |
540 | /* then reserve the initrd, if any */ | |
541 | if (initrd_start && (initrd_end > initrd_start)) | |
542 | lmb_reserve(__pa(initrd_start), initrd_end - initrd_start); | |
543 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
544 | ||
cbbcf340 KG |
545 | #ifdef CONFIG_PPC32 |
546 | /* | |
547 | * Handle the case where we might be booting from an old kexec | |
548 | * image that setup the mem_rsvmap as pairs of 32-bit values | |
549 | */ | |
550 | if (*reserve_map > 0xffffffffull) { | |
551 | u32 base_32, size_32; | |
552 | u32 *reserve_map_32 = (u32 *)reserve_map; | |
553 | ||
554 | while (1) { | |
555 | base_32 = *(reserve_map_32++); | |
556 | size_32 = *(reserve_map_32++); | |
557 | if (size_32 == 0) | |
558 | break; | |
8a300887 JL |
559 | /* skip if the reservation is for the blob */ |
560 | if (base_32 == self_base && size_32 == self_size) | |
561 | continue; | |
329dda08 | 562 | DBG("reserving: %x -> %x\n", base_32, size_32); |
cbbcf340 KG |
563 | lmb_reserve(base_32, size_32); |
564 | } | |
565 | return; | |
566 | } | |
567 | #endif | |
9b6b563c PM |
568 | while (1) { |
569 | base = *(reserve_map++); | |
570 | size = *(reserve_map++); | |
571 | if (size == 0) | |
572 | break; | |
cbbcf340 | 573 | DBG("reserving: %llx -> %llx\n", base, size); |
9b6b563c PM |
574 | lmb_reserve(base, size); |
575 | } | |
9b6b563c PM |
576 | } |
577 | ||
6ac26c8a | 578 | #ifdef CONFIG_PHYP_DUMP |
37ddd5d0 MA |
579 | /** |
580 | * phyp_dump_calculate_reserve_size() - reserve variable boot area 5% or arg | |
581 | * | |
582 | * Function to find the largest size we need to reserve | |
583 | * during early boot process. | |
584 | * | |
585 | * It either looks for boot param and returns that OR | |
586 | * returns larger of 256 or 5% rounded down to multiples of 256MB. | |
587 | * | |
588 | */ | |
589 | static inline unsigned long phyp_dump_calculate_reserve_size(void) | |
590 | { | |
591 | unsigned long tmp; | |
592 | ||
593 | if (phyp_dump_info->reserve_bootvar) | |
594 | return phyp_dump_info->reserve_bootvar; | |
595 | ||
596 | /* divide by 20 to get 5% of value */ | |
597 | tmp = lmb_end_of_DRAM(); | |
598 | do_div(tmp, 20); | |
599 | ||
600 | /* round it down in multiples of 256 */ | |
601 | tmp = tmp & ~0x0FFFFFFFUL; | |
602 | ||
603 | return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END); | |
604 | } | |
605 | ||
6ac26c8a MA |
606 | /** |
607 | * phyp_dump_reserve_mem() - reserve all not-yet-dumped mmemory | |
608 | * | |
609 | * This routine may reserve memory regions in the kernel only | |
610 | * if the system is supported and a dump was taken in last | |
611 | * boot instance or if the hardware is supported and the | |
612 | * scratch area needs to be setup. In other instances it returns | |
613 | * without reserving anything. The memory in case of dump being | |
614 | * active is freed when the dump is collected (by userland tools). | |
615 | */ | |
616 | static void __init phyp_dump_reserve_mem(void) | |
617 | { | |
618 | unsigned long base, size; | |
37ddd5d0 MA |
619 | unsigned long variable_reserve_size; |
620 | ||
6ac26c8a MA |
621 | if (!phyp_dump_info->phyp_dump_configured) { |
622 | printk(KERN_ERR "Phyp-dump not supported on this hardware\n"); | |
623 | return; | |
624 | } | |
625 | ||
654f596d MA |
626 | if (!phyp_dump_info->phyp_dump_at_boot) { |
627 | printk(KERN_INFO "Phyp-dump disabled at boot time\n"); | |
628 | return; | |
629 | } | |
630 | ||
37ddd5d0 MA |
631 | variable_reserve_size = phyp_dump_calculate_reserve_size(); |
632 | ||
6ac26c8a MA |
633 | if (phyp_dump_info->phyp_dump_is_active) { |
634 | /* Reserve *everything* above RMR.Area freed by userland tools*/ | |
37ddd5d0 | 635 | base = variable_reserve_size; |
6ac26c8a MA |
636 | size = lmb_end_of_DRAM() - base; |
637 | ||
638 | /* XXX crashed_ram_end is wrong, since it may be beyond | |
639 | * the memory_limit, it will need to be adjusted. */ | |
640 | lmb_reserve(base, size); | |
641 | ||
642 | phyp_dump_info->init_reserve_start = base; | |
643 | phyp_dump_info->init_reserve_size = size; | |
644 | } else { | |
645 | size = phyp_dump_info->cpu_state_size + | |
646 | phyp_dump_info->hpte_region_size + | |
37ddd5d0 | 647 | variable_reserve_size; |
6ac26c8a MA |
648 | base = lmb_end_of_DRAM() - size; |
649 | lmb_reserve(base, size); | |
650 | phyp_dump_info->init_reserve_start = base; | |
651 | phyp_dump_info->init_reserve_size = size; | |
652 | } | |
653 | } | |
654 | #else | |
655 | static inline void __init phyp_dump_reserve_mem(void) {} | |
656 | #endif /* CONFIG_PHYP_DUMP && CONFIG_PPC_RTAS */ | |
657 | ||
658 | ||
9b6b563c PM |
659 | void __init early_init_devtree(void *params) |
660 | { | |
49a84965 | 661 | phys_addr_t limit; |
6ca4f749 | 662 | |
44348105 | 663 | DBG(" -> early_init_devtree(%p)\n", params); |
9b6b563c PM |
664 | |
665 | /* Setup flat device-tree pointer */ | |
666 | initial_boot_params = params; | |
667 | ||
458148c0 ME |
668 | #ifdef CONFIG_PPC_RTAS |
669 | /* Some machines might need RTAS info for debugging, grab it now. */ | |
670 | of_scan_flat_dt(early_init_dt_scan_rtas, NULL); | |
671 | #endif | |
672 | ||
6ac26c8a MA |
673 | #ifdef CONFIG_PHYP_DUMP |
674 | /* scan tree to see if dump occured during last boot */ | |
675 | of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL); | |
676 | #endif | |
677 | ||
9b6b563c PM |
678 | /* Retrieve various informations from the /chosen node of the |
679 | * device-tree, including the platform type, initrd location and | |
680 | * size, TCE reserve, and more ... | |
681 | */ | |
3c726f8d | 682 | of_scan_flat_dt(early_init_dt_scan_chosen, NULL); |
9b6b563c PM |
683 | |
684 | /* Scan memory nodes and rebuild LMBs */ | |
685 | lmb_init(); | |
3c726f8d | 686 | of_scan_flat_dt(early_init_dt_scan_root, NULL); |
51975db0 | 687 | of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); |
846f77b0 ME |
688 | |
689 | /* Save command line for /proc/cmdline and then parse parameters */ | |
b8757b21 | 690 | strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); |
846f77b0 ME |
691 | parse_early_param(); |
692 | ||
9b6b563c | 693 | /* Reserve LMB regions used by kernel, initrd, dt, etc... */ |
0cc4746c | 694 | lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); |
549e8152 PM |
695 | /* If relocatable, reserve first 32k for interrupt vectors etc. */ |
696 | if (PHYSICAL_START > MEMORY_START) | |
697 | lmb_reserve(MEMORY_START, 0x8000); | |
47310413 | 698 | reserve_kdump_trampoline(); |
35dd5432 | 699 | reserve_crashkernel(); |
9b6b563c | 700 | early_reserve_mem(); |
6ac26c8a | 701 | phyp_dump_reserve_mem(); |
9b6b563c | 702 | |
6ca4f749 HB |
703 | limit = memory_limit; |
704 | if (! limit) { | |
49a84965 | 705 | phys_addr_t memsize; |
6ca4f749 HB |
706 | |
707 | /* Ensure that total memory size is page-aligned, because | |
708 | * otherwise mark_bootmem() gets upset. */ | |
709 | lmb_analyze(); | |
710 | memsize = lmb_phys_mem_size(); | |
711 | if ((memsize & PAGE_MASK) != memsize) | |
712 | limit = memsize & PAGE_MASK; | |
713 | } | |
714 | lmb_enforce_memory_limit(limit); | |
715 | ||
2babf5c2 | 716 | lmb_analyze(); |
059f134f | 717 | lmb_dump_all(); |
2babf5c2 | 718 | |
49a84965 | 719 | DBG("Phys. mem: %llx\n", lmb_phys_mem_size()); |
2babf5c2 ME |
720 | |
721 | /* We may need to relocate the flat tree, do it now. | |
722 | * FIXME .. and the initrd too? */ | |
723 | move_device_tree(); | |
724 | ||
1426d5a3 ME |
725 | allocate_pacas(); |
726 | ||
9b6b563c PM |
727 | DBG("Scanning CPUs ...\n"); |
728 | ||
3c726f8d BH |
729 | /* Retreive CPU related informations from the flat tree |
730 | * (altivec support, boot CPU ID, ...) | |
9b6b563c | 731 | */ |
3c726f8d | 732 | of_scan_flat_dt(early_init_dt_scan_cpus, NULL); |
9b6b563c | 733 | |
9b6b563c PM |
734 | DBG(" <- early_init_devtree()\n"); |
735 | } | |
736 | ||
9b6b563c PM |
737 | /******* |
738 | * | |
739 | * New implementation of the OF "find" APIs, return a refcounted | |
740 | * object, call of_node_put() when done. The device tree and list | |
741 | * are protected by a rw_lock. | |
742 | * | |
743 | * Note that property management will need some locking as well, | |
744 | * this isn't dealt with yet. | |
745 | * | |
746 | *******/ | |
747 | ||
e523f723 NL |
748 | /** |
749 | * of_find_next_cache_node - Find a node's subsidiary cache | |
750 | * @np: node of type "cpu" or "cache" | |
751 | * | |
752 | * Returns a node pointer with refcount incremented, use | |
753 | * of_node_put() on it when done. Caller should hold a reference | |
754 | * to np. | |
755 | */ | |
756 | struct device_node *of_find_next_cache_node(struct device_node *np) | |
757 | { | |
758 | struct device_node *child; | |
759 | const phandle *handle; | |
760 | ||
761 | handle = of_get_property(np, "l2-cache", NULL); | |
762 | if (!handle) | |
763 | handle = of_get_property(np, "next-level-cache", NULL); | |
764 | ||
765 | if (handle) | |
766 | return of_find_node_by_phandle(*handle); | |
767 | ||
768 | /* OF on pmac has nodes instead of properties named "l2-cache" | |
769 | * beneath CPU nodes. | |
770 | */ | |
771 | if (!strcmp(np->type, "cpu")) | |
772 | for_each_child_of_node(np, child) | |
773 | if (!strcmp(child->type, "cache")) | |
774 | return child; | |
775 | ||
776 | return NULL; | |
777 | } | |
778 | ||
9b6b563c PM |
779 | #ifdef CONFIG_PPC_PSERIES |
780 | /* | |
781 | * Fix up the uninitialized fields in a new device node: | |
0ebfff14 | 782 | * name, type and pci-specific fields |
9b6b563c PM |
783 | */ |
784 | ||
cc5d0189 | 785 | static int of_finish_dynamic_node(struct device_node *node) |
9b6b563c PM |
786 | { |
787 | struct device_node *parent = of_get_parent(node); | |
788 | int err = 0; | |
a7f67bdf | 789 | const phandle *ibm_phandle; |
9b6b563c | 790 | |
0e56efc7 SR |
791 | node->name = of_get_property(node, "name", NULL); |
792 | node->type = of_get_property(node, "device_type", NULL); | |
9b6b563c | 793 | |
847f5976 BH |
794 | if (!node->name) |
795 | node->name = "<NULL>"; | |
796 | if (!node->type) | |
797 | node->type = "<NULL>"; | |
798 | ||
9b6b563c PM |
799 | if (!parent) { |
800 | err = -ENODEV; | |
801 | goto out; | |
802 | } | |
803 | ||
804 | /* We don't support that function on PowerMac, at least | |
805 | * not yet | |
806 | */ | |
e8222502 | 807 | if (machine_is(powermac)) |
9b6b563c PM |
808 | return -ENODEV; |
809 | ||
6016a363 | 810 | /* fix up new node's phandle field */ |
0e56efc7 | 811 | if ((ibm_phandle = of_get_property(node, "ibm,phandle", NULL))) |
6016a363 | 812 | node->phandle = *ibm_phandle; |
9b6b563c PM |
813 | |
814 | out: | |
815 | of_node_put(parent); | |
816 | return err; | |
817 | } | |
818 | ||
819 | static int prom_reconfig_notifier(struct notifier_block *nb, | |
820 | unsigned long action, void *node) | |
821 | { | |
822 | int err; | |
823 | ||
824 | switch (action) { | |
825 | case PSERIES_RECONFIG_ADD: | |
cc5d0189 | 826 | err = of_finish_dynamic_node(node); |
9b6b563c PM |
827 | if (err < 0) { |
828 | printk(KERN_ERR "finish_node returned %d\n", err); | |
829 | err = NOTIFY_BAD; | |
830 | } | |
831 | break; | |
832 | default: | |
833 | err = NOTIFY_DONE; | |
834 | break; | |
835 | } | |
836 | return err; | |
837 | } | |
838 | ||
839 | static struct notifier_block prom_reconfig_nb = { | |
840 | .notifier_call = prom_reconfig_notifier, | |
841 | .priority = 10, /* This one needs to run first */ | |
842 | }; | |
843 | ||
844 | static int __init prom_reconfig_setup(void) | |
845 | { | |
846 | return pSeries_reconfig_notifier_register(&prom_reconfig_nb); | |
847 | } | |
848 | __initcall(prom_reconfig_setup); | |
849 | #endif | |
850 | ||
acf7d768 BH |
851 | /* Find the device node for a given logical cpu number, also returns the cpu |
852 | * local thread number (index in ibm,interrupt-server#s) if relevant and | |
853 | * asked for (non NULL) | |
854 | */ | |
855 | struct device_node *of_get_cpu_node(int cpu, unsigned int *thread) | |
856 | { | |
857 | int hardid; | |
858 | struct device_node *np; | |
859 | ||
860 | hardid = get_hard_smp_processor_id(cpu); | |
861 | ||
862 | for_each_node_by_type(np, "cpu") { | |
a7f67bdf | 863 | const u32 *intserv; |
acf7d768 BH |
864 | unsigned int plen, t; |
865 | ||
866 | /* Check for ibm,ppc-interrupt-server#s. If it doesn't exist | |
867 | * fallback to "reg" property and assume no threads | |
868 | */ | |
0e56efc7 | 869 | intserv = of_get_property(np, "ibm,ppc-interrupt-server#s", |
a7f67bdf | 870 | &plen); |
acf7d768 | 871 | if (intserv == NULL) { |
0e56efc7 | 872 | const u32 *reg = of_get_property(np, "reg", NULL); |
acf7d768 BH |
873 | if (reg == NULL) |
874 | continue; | |
875 | if (*reg == hardid) { | |
876 | if (thread) | |
877 | *thread = 0; | |
878 | return np; | |
879 | } | |
880 | } else { | |
881 | plen /= sizeof(u32); | |
882 | for (t = 0; t < plen; t++) { | |
883 | if (hardid == intserv[t]) { | |
884 | if (thread) | |
885 | *thread = t; | |
886 | return np; | |
887 | } | |
888 | } | |
889 | } | |
890 | } | |
891 | return NULL; | |
892 | } | |
36ca4ba4 | 893 | EXPORT_SYMBOL(of_get_cpu_node); |
7a4571ae | 894 | |
94a3807c | 895 | #if defined(CONFIG_DEBUG_FS) && defined(DEBUG) |
7a4571ae ME |
896 | static struct debugfs_blob_wrapper flat_dt_blob; |
897 | ||
898 | static int __init export_flat_device_tree(void) | |
899 | { | |
900 | struct dentry *d; | |
901 | ||
7a4571ae ME |
902 | flat_dt_blob.data = initial_boot_params; |
903 | flat_dt_blob.size = initial_boot_params->totalsize; | |
904 | ||
905 | d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR, | |
94a3807c | 906 | powerpc_debugfs_root, &flat_dt_blob); |
7a4571ae ME |
907 | if (!d) |
908 | return 1; | |
909 | ||
910 | return 0; | |
911 | } | |
912 | __initcall(export_flat_device_tree); | |
913 | #endif |