blob: 16278968dab68e2153a284709e2b4dfdd067adb4 [file] [log] [blame]
Paul Mackerras40ef8cb2005-10-10 22:50:37 +10001/*
2 *
3 * Common boot and setup code.
4 *
5 * Copyright (C) 2001 PPC64 Team, IBM Corp
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#undef DEBUG
14
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100015#include <linux/module.h>
16#include <linux/string.h>
17#include <linux/sched.h>
18#include <linux/init.h>
19#include <linux/kernel.h>
20#include <linux/reboot.h>
21#include <linux/delay.h>
22#include <linux/initrd.h>
23#include <linux/ide.h>
24#include <linux/seq_file.h>
25#include <linux/ioport.h>
26#include <linux/console.h>
27#include <linux/utsname.h>
28#include <linux/tty.h>
29#include <linux/root_dev.h>
30#include <linux/notifier.h>
31#include <linux/cpu.h>
32#include <linux/unistd.h>
33#include <linux/serial.h>
34#include <linux/serial_8250.h>
Anton Blanchard7a0268f2006-01-11 13:16:44 +110035#include <linux/bootmem.h>
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100036#include <asm/io.h>
Michael Ellerman0cc47462005-12-04 18:39:37 +110037#include <asm/kdump.h>
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100038#include <asm/prom.h>
39#include <asm/processor.h>
40#include <asm/pgtable.h>
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100041#include <asm/smp.h>
42#include <asm/elf.h>
43#include <asm/machdep.h>
44#include <asm/paca.h>
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100045#include <asm/time.h>
46#include <asm/cputable.h>
47#include <asm/sections.h>
48#include <asm/btext.h>
49#include <asm/nvram.h>
50#include <asm/setup.h>
51#include <asm/system.h>
52#include <asm/rtas.h>
53#include <asm/iommu.h>
54#include <asm/serial.h>
55#include <asm/cache.h>
56#include <asm/page.h>
57#include <asm/mmu.h>
58#include <asm/lmb.h>
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100059#include <asm/firmware.h>
Paul Mackerrasf78541d2005-10-28 22:53:37 +100060#include <asm/xmon.h>
David Gibsondcad47f2005-11-07 09:49:43 +110061#include <asm/udbg.h>
Michael Ellerman593e5372005-11-12 00:06:06 +110062#include <asm/kexec.h>
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100063
Stephen Rothwell66ba1352005-11-09 11:01:06 +110064#include "setup.h"
65
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100066#ifdef DEBUG
67#define DBG(fmt...) udbg_printf(fmt)
68#else
69#define DBG(fmt...)
70#endif
71
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100072int have_of = 1;
73int boot_cpuid = 0;
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100074dev_t boot_dev;
75u64 ppc64_pft_size;
76
Olof Johanssondabcafd2005-12-08 19:40:17 -060077/* Pick defaults since we might want to patch instructions
78 * before we've read this from the device tree.
79 */
80struct ppc64_caches ppc64_caches = {
Olof Johansson5a2fe382006-09-06 14:34:41 -050081 .dline_size = 0x40,
82 .log_dline_size = 6,
83 .iline_size = 0x40,
84 .log_iline_size = 6
Olof Johanssondabcafd2005-12-08 19:40:17 -060085};
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100086EXPORT_SYMBOL_GPL(ppc64_caches);
87
88/*
89 * These are used in binfmt_elf.c to put aux entries on the stack
90 * for each elf executable being started.
91 */
92int dcache_bsize;
93int icache_bsize;
94int ucache_bsize;
95
Paul Mackerras40ef8cb2005-10-10 22:50:37 +100096#ifdef CONFIG_SMP
97
98static int smt_enabled_cmdline;
99
100/* Look for ibm,smt-enabled OF option */
101static void check_smt_enabled(void)
102{
103 struct device_node *dn;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000104 const char *smt_option;
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000105
106 /* Allow the command line to overrule the OF option */
107 if (smt_enabled_cmdline)
108 return;
109
110 dn = of_find_node_by_path("/options");
111
112 if (dn) {
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000113 smt_option = get_property(dn, "ibm,smt-enabled", NULL);
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000114
115 if (smt_option) {
116 if (!strcmp(smt_option, "on"))
117 smt_enabled_at_boot = 1;
118 else if (!strcmp(smt_option, "off"))
119 smt_enabled_at_boot = 0;
120 }
121 }
122}
123
124/* Look for smt-enabled= cmdline option */
125static int __init early_smt_enabled(char *p)
126{
127 smt_enabled_cmdline = 1;
128
129 if (!p)
130 return 0;
131
132 if (!strcmp(p, "on") || !strcmp(p, "1"))
133 smt_enabled_at_boot = 1;
134 else if (!strcmp(p, "off") || !strcmp(p, "0"))
135 smt_enabled_at_boot = 0;
136
137 return 0;
138}
139early_param("smt-enabled", early_smt_enabled);
140
Paul Mackerras5ad57072005-11-05 10:33:55 +1100141#else
142#define check_smt_enabled()
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000143#endif /* CONFIG_SMP */
144
Michael Ellerman4ba99b92006-06-23 18:20:09 +1000145/* Put the paca pointer into r13 and SPRG3 */
146void __init setup_paca(int cpu)
147{
148 local_paca = &paca[cpu];
149 mtspr(SPRN_SPRG3, local_paca);
150}
151
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000152/*
153 * Early initialization entry point. This is called by head.S
154 * with MMU translation disabled. We rely on the "feature" of
155 * the CPU that ignores the top 2 bits of the address in real
156 * mode so we can access kernel globals normally provided we
157 * only toy with things in the RMO region. From here, we do
158 * some early parsing of the device-tree to setup out LMB
159 * data structures, and allocate & initialize the hash table
160 * and segment tables so we can start running with translation
161 * enabled.
162 *
163 * It is this function which will call the probe() callback of
164 * the various platform types and copy the matching one to the
165 * global ppc_md structure. Your platform can eventually do
166 * some very early initializations from the probe() routine, but
167 * this is not recommended, be very careful as, for example, the
168 * device-tree is not accessible via normal means at this point.
169 */
170
171void __init early_setup(unsigned long dt_ptr)
172{
Benjamin Herrenschmidt42c4aaa2006-10-24 16:42:40 +1000173 /* Identify CPU type */
174 identify_cpu(0);
175
Michael Ellerman33dbcf72006-06-28 13:18:53 +1000176 /* Assume we're on cpu 0 for now. Don't write to the paca yet! */
177 setup_paca(0);
178
Michael Ellerman296167a2006-01-11 11:54:09 +1100179 /* Enable early debugging if any specified (see udbg.h) */
180 udbg_early_init();
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000181
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100182 DBG(" -> early_setup(), dt_ptr: 0x%lx\n", dt_ptr);
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000183
184 /*
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000185 * Do early initializations using the flattened device
186 * tree, like retreiving the physical memory map or
187 * calculating/retreiving the hash table size
188 */
189 early_init_devtree(__va(dt_ptr));
190
Anton Blanchard4df20462006-03-25 17:25:17 +1100191 /* Now we know the logical id of our boot cpu, setup the paca. */
Michael Ellerman4ba99b92006-06-23 18:20:09 +1000192 setup_paca(boot_cpuid);
Anton Blanchard4df20462006-03-25 17:25:17 +1100193
194 /* Fix up paca fields required for the boot cpu */
195 get_paca()->cpu_start = 1;
196 get_paca()->stab_real = __pa((u64)&initial_stab);
197 get_paca()->stab_addr = (u64)&initial_stab;
198
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100199 /* Probe the machine type */
200 probe_machine();
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000201
Michael Ellerman47310412006-05-17 18:00:49 +1000202 setup_kdump_trampoline();
Michael Ellerman0cc47462005-12-04 18:39:37 +1100203
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000204 DBG("Found, Initializing memory management...\n");
205
206 /*
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000207 * Initialize the MMU Hash table and create the linear mapping
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100208 * of memory. Has to be done before stab/slb initialization as
209 * this is currently where the page size encoding is obtained
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000210 */
211 htab_initialize();
212
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100213 /*
214 * Initialize stab / SLB management except on iSeries
215 */
Stephen Rothwell856d08e2006-04-02 02:45:04 +1000216 if (cpu_has_feature(CPU_FTR_SLB))
217 slb_initialize();
218 else if (!firmware_has_feature(FW_FEATURE_ISERIES))
219 stab_initialize(get_paca()->stab_real);
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100220
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000221 DBG(" <- early_setup()\n");
222}
223
Paul Mackerras799d6042005-11-10 13:37:51 +1100224#ifdef CONFIG_SMP
225void early_setup_secondary(void)
226{
227 struct paca_struct *lpaca = get_paca();
228
229 /* Mark enabled in PACA */
230 lpaca->proc_enabled = 0;
231
232 /* Initialize hash table for that CPU */
233 htab_initialize_secondary();
234
235 /* Initialize STAB/SLB. We use a virtual address as it works
236 * in real mode on pSeries and we want a virutal address on
237 * iSeries anyway
238 */
239 if (cpu_has_feature(CPU_FTR_SLB))
240 slb_initialize();
241 else
242 stab_initialize(lpaca->stab_addr);
243}
244
245#endif /* CONFIG_SMP */
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000246
Michael Ellermanb8f51022005-11-04 12:09:42 +1100247#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC)
248void smp_release_cpus(void)
249{
250 extern unsigned long __secondary_hold_spinloop;
Michael Ellerman758438a2005-12-05 15:49:00 -0600251 unsigned long *ptr;
Michael Ellermanb8f51022005-11-04 12:09:42 +1100252
253 DBG(" -> smp_release_cpus()\n");
254
255 /* All secondary cpus are spinning on a common spinloop, release them
256 * all now so they can start to spin on their individual paca
257 * spinloops. For non SMP kernels, the secondary cpus never get out
258 * of the common spinloop.
259 * This is useless but harmless on iSeries, secondaries are already
260 * waiting on their paca spinloops. */
261
Michael Ellerman758438a2005-12-05 15:49:00 -0600262 ptr = (unsigned long *)((unsigned long)&__secondary_hold_spinloop
263 - PHYSICAL_START);
264 *ptr = 1;
Michael Ellermanb8f51022005-11-04 12:09:42 +1100265 mb();
266
267 DBG(" <- smp_release_cpus()\n");
268}
269#endif /* CONFIG_SMP || CONFIG_KEXEC */
270
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000271/*
Paul Mackerras799d6042005-11-10 13:37:51 +1100272 * Initialize some remaining members of the ppc64_caches and systemcfg
273 * structures
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000274 * (at least until we get rid of them completely). This is mostly some
275 * cache informations about the CPU that will be used by cache flush
276 * routines and/or provided to userland
277 */
278static void __init initialize_cache_info(void)
279{
280 struct device_node *np;
281 unsigned long num_cpus = 0;
282
283 DBG(" -> initialize_cache_info()\n");
284
285 for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) {
286 num_cpus += 1;
287
288 /* We're assuming *all* of the CPUs have the same
289 * d-cache and i-cache sizes... -Peter
290 */
291
292 if ( num_cpus == 1 ) {
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000293 const u32 *sizep, *lsizep;
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000294 u32 size, lsize;
295 const char *dc, *ic;
296
297 /* Then read cache informations */
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100298 if (machine_is(powermac)) {
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000299 dc = "d-cache-block-size";
300 ic = "i-cache-block-size";
301 } else {
302 dc = "d-cache-line-size";
303 ic = "i-cache-line-size";
304 }
305
306 size = 0;
307 lsize = cur_cpu_spec->dcache_bsize;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000308 sizep = get_property(np, "d-cache-size", NULL);
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000309 if (sizep != NULL)
310 size = *sizep;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000311 lsizep = get_property(np, dc, NULL);
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000312 if (lsizep != NULL)
313 lsize = *lsizep;
314 if (sizep == 0 || lsizep == 0)
315 DBG("Argh, can't find dcache properties ! "
316 "sizep: %p, lsizep: %p\n", sizep, lsizep);
317
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +1100318 ppc64_caches.dsize = size;
319 ppc64_caches.dline_size = lsize;
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000320 ppc64_caches.log_dline_size = __ilog2(lsize);
321 ppc64_caches.dlines_per_page = PAGE_SIZE / lsize;
322
323 size = 0;
324 lsize = cur_cpu_spec->icache_bsize;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000325 sizep = get_property(np, "i-cache-size", NULL);
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000326 if (sizep != NULL)
327 size = *sizep;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000328 lsizep = get_property(np, ic, NULL);
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000329 if (lsizep != NULL)
330 lsize = *lsizep;
331 if (sizep == 0 || lsizep == 0)
332 DBG("Argh, can't find icache properties ! "
333 "sizep: %p, lsizep: %p\n", sizep, lsizep);
334
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +1100335 ppc64_caches.isize = size;
336 ppc64_caches.iline_size = lsize;
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000337 ppc64_caches.log_iline_size = __ilog2(lsize);
338 ppc64_caches.ilines_per_page = PAGE_SIZE / lsize;
339 }
340 }
341
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000342 DBG(" <- initialize_cache_info()\n");
343}
344
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000345
346/*
347 * Do some initial setup of the system. The parameters are those which
348 * were passed in from the bootloader.
349 */
350void __init setup_system(void)
351{
352 DBG(" -> setup_system()\n");
353
Benjamin Herrenschmidt42c4aaa2006-10-24 16:42:40 +1000354 /* Apply the CPUs-specific and firmware specific fixups to kernel
355 * text (nop out sections not relevant to this CPU or this firmware)
356 */
Benjamin Herrenschmidt0909c8c2006-10-20 11:47:18 +1000357 do_feature_fixups(cur_cpu_spec->cpu_features,
Benjamin Herrenschmidt42c4aaa2006-10-24 16:42:40 +1000358 &__start___ftr_fixup, &__stop___ftr_fixup);
Benjamin Herrenschmidt0909c8c2006-10-20 11:47:18 +1000359 do_feature_fixups(powerpc_firmware_features,
Benjamin Herrenschmidt42c4aaa2006-10-24 16:42:40 +1000360 &__start___fw_ftr_fixup, &__stop___fw_ftr_fixup);
361
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000362 /*
363 * Unflatten the device-tree passed by prom_init or kexec
364 */
365 unflatten_device_tree();
366
367 /*
368 * Fill the ppc64_caches & systemcfg structures with informations
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000369 * retrieved from the device-tree.
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000370 */
371 initialize_cache_info();
372
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000373 /*
374 * Initialize irq remapping subsystem
375 */
376 irq_early_init();
377
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000378#ifdef CONFIG_PPC_RTAS
379 /*
380 * Initialize RTAS if available
381 */
382 rtas_initialize();
383#endif /* CONFIG_PPC_RTAS */
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000384
385 /*
386 * Check if we have an initrd provided via the device-tree
387 */
388 check_for_initrd();
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000389
390 /*
391 * Do some platform specific early initializations, that includes
392 * setting up the hash table pointers. It also sets up some interrupt-mapping
393 * related options that will be used by finish_device_tree()
394 */
395 ppc_md.init_early();
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000396
Benjamin Herrenschmidt463ce0e2005-11-23 17:56:06 +1100397 /*
398 * We can discover serial ports now since the above did setup the
399 * hash table management for us, thus ioremap works. We do that early
400 * so that further code can be debugged
401 */
Benjamin Herrenschmidt463ce0e2005-11-23 17:56:06 +1100402 find_legacy_serial_ports();
Benjamin Herrenschmidt463ce0e2005-11-23 17:56:06 +1100403
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000404 /*
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000405 * Register early console
406 */
407 register_early_udbg_console();
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000408
Michael Ellerman476792832006-10-03 14:12:08 +1000409 /*
410 * Initialize xmon
411 */
412 xmon_setup();
Michael Ellerman480f6f32006-05-17 18:00:41 +1000413
Paul Mackerras5ad57072005-11-05 10:33:55 +1100414 check_smt_enabled();
415 smp_setup_cpu_maps();
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000416
Michael Ellermanf018b362006-02-16 14:13:50 +1100417#ifdef CONFIG_SMP
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000418 /* Release secondary cpus out of their spinloops at 0x60 now that
419 * we can map physical -> logical CPU ids
420 */
421 smp_release_cpus();
Michael Ellermanf018b362006-02-16 14:13:50 +1100422#endif
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000423
Serge E. Hallyn96b644b2006-10-02 02:18:13 -0700424 printk("Starting Linux PPC64 %s\n", init_utsname()->version);
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000425
426 printk("-----------------------------------------------------\n");
427 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size);
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +1100428 printk("physicalMemorySize = 0x%lx\n", lmb_phys_mem_size());
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000429 printk("ppc64_caches.dcache_line_size = 0x%x\n",
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +1100430 ppc64_caches.dline_size);
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000431 printk("ppc64_caches.icache_line_size = 0x%x\n",
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +1100432 ppc64_caches.iline_size);
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000433 printk("htab_address = 0x%p\n", htab_address);
434 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask);
Michael Ellerman398ab1f2005-12-04 18:39:23 +1100435#if PHYSICAL_START > 0
436 printk("physical_start = 0x%x\n", PHYSICAL_START);
437#endif
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000438 printk("-----------------------------------------------------\n");
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000439
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000440 DBG(" <- setup_system()\n");
441}
442
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000443#ifdef CONFIG_IRQSTACKS
444static void __init irqstack_early_init(void)
445{
446 unsigned int i;
447
448 /*
449 * interrupt stacks must be under 256MB, we cannot afford to take
450 * SLB misses on them.
451 */
KAMEZAWA Hiroyuki0e551952006-03-28 14:50:51 -0800452 for_each_possible_cpu(i) {
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100453 softirq_ctx[i] = (struct thread_info *)
454 __va(lmb_alloc_base(THREAD_SIZE,
455 THREAD_SIZE, 0x10000000));
456 hardirq_ctx[i] = (struct thread_info *)
457 __va(lmb_alloc_base(THREAD_SIZE,
458 THREAD_SIZE, 0x10000000));
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000459 }
460}
461#else
462#define irqstack_early_init()
463#endif
464
465/*
466 * Stack space used when we detect a bad kernel stack pointer, and
467 * early in SMP boots before relocation is enabled.
468 */
469static void __init emergency_stack_init(void)
470{
471 unsigned long limit;
472 unsigned int i;
473
474 /*
475 * Emergency stacks must be under 256MB, we cannot afford to take
476 * SLB misses on them. The ABI also requires them to be 128-byte
477 * aligned.
478 *
479 * Since we use these as temporary stacks during secondary CPU
480 * bringup, we need to get at them in real mode. This means they
481 * must also be within the RMO region.
482 */
483 limit = min(0x10000000UL, lmb.rmo_size);
484
KAMEZAWA Hiroyuki0e551952006-03-28 14:50:51 -0800485 for_each_possible_cpu(i)
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100486 paca[i].emergency_sp =
487 __va(lmb_alloc_base(HW_PAGE_SIZE, 128, limit)) + HW_PAGE_SIZE;
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000488}
489
490/*
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000491 * Called into from start_kernel, after lock_kernel has been called.
492 * Initializes bootmem, which is unsed to manage page allocation until
493 * mem_init is called.
494 */
495void __init setup_arch(char **cmdline_p)
496{
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000497 ppc64_boot_msg(0x12, "Setup Arch");
498
499 *cmdline_p = cmd_line;
500
501 /*
502 * Set cache line size based on type of cpu as a default.
503 * Systems with OF can look in the properties on the cpu node(s)
504 * for a possibly more accurate value.
505 */
506 dcache_bsize = ppc64_caches.dline_size;
507 icache_bsize = ppc64_caches.iline_size;
508
509 /* reboot on panic */
510 panic_timeout = 180;
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000511
512 if (ppc_md.panic)
Kumar Gala7e990262006-05-05 00:02:08 -0500513 setup_panic();
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000514
515 init_mm.start_code = PAGE_OFFSET;
516 init_mm.end_code = (unsigned long) _etext;
517 init_mm.end_data = (unsigned long) _edata;
518 init_mm.brk = klimit;
519
520 irqstack_early_init();
521 emergency_stack_init();
522
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000523 stabs_alloc();
524
525 /* set up the bootmem stuff with available memory */
526 do_init_bootmem();
527 sparse_init();
528
Paul Mackerras04580602005-10-20 21:00:20 +1000529#ifdef CONFIG_DUMMY_CONSOLE
530 conswitchp = &dummy_con;
531#endif
532
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000533 ppc_md.setup_arch();
534
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000535 paging_init();
536 ppc64_boot_msg(0x15, "Setup Done");
537}
538
539
540/* ToDo: do something useful if ppc_md is not yet setup. */
541#define PPC64_LINUX_FUNCTION 0x0f000000
542#define PPC64_IPL_MESSAGE 0xc0000000
543#define PPC64_TERM_MESSAGE 0xb0000000
544
545static void ppc64_do_msg(unsigned int src, const char *msg)
546{
547 if (ppc_md.progress) {
548 char buf[128];
549
550 sprintf(buf, "%08X\n", src);
551 ppc_md.progress(buf, 0);
552 snprintf(buf, 128, "%s", msg);
553 ppc_md.progress(buf, 0);
554 }
555}
556
557/* Print a boot progress message. */
558void ppc64_boot_msg(unsigned int src, const char *msg)
559{
560 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg);
561 printk("[boot]%04x %s\n", src, msg);
562}
563
564/* Print a termination message (print only -- does not stop the kernel) */
565void ppc64_terminate_msg(unsigned int src, const char *msg)
566{
567 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg);
568 printk("[terminate]%04x %s\n", src, msg);
569}
570
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000571void cpu_die(void)
572{
573 if (ppc_md.cpu_die)
574 ppc_md.cpu_die();
575}
Anton Blanchard7a0268f2006-01-11 13:16:44 +1100576
577#ifdef CONFIG_SMP
578void __init setup_per_cpu_areas(void)
579{
580 int i;
581 unsigned long size;
582 char *ptr;
583
584 /* Copy section for each CPU (we discard the original) */
585 size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
586#ifdef CONFIG_MODULES
587 if (size < PERCPU_ENOUGH_ROOM)
588 size = PERCPU_ENOUGH_ROOM;
589#endif
590
KAMEZAWA Hiroyuki0e551952006-03-28 14:50:51 -0800591 for_each_possible_cpu(i) {
Anton Blanchard7a0268f2006-01-11 13:16:44 +1100592 ptr = alloc_bootmem_node(NODE_DATA(cpu_to_node(i)), size);
593 if (!ptr)
594 panic("Cannot allocate cpu data for CPU %d\n", i);
595
596 paca[i].data_offset = ptr - __per_cpu_start;
597 memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
598 }
599}
600#endif