blob: 38bf80a22f02396704fbb0f69ccef74fd83d689b [file] [log] [blame]
Adrian Bunk88278ca2008-05-19 16:53:02 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * linux/arch/sparc/kernel/setup.c
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
6 */
7
8#include <linux/errno.h>
9#include <linux/sched.h>
10#include <linux/kernel.h>
11#include <linux/mm.h>
12#include <linux/stddef.h>
13#include <linux/unistd.h>
14#include <linux/ptrace.h>
15#include <linux/slab.h>
16#include <linux/initrd.h>
17#include <asm/smp.h>
18#include <linux/user.h>
Jon Smirl894673e2006-07-10 04:44:13 -070019#include <linux/screen_info.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/fs.h>
22#include <linux/seq_file.h>
23#include <linux/syscalls.h>
24#include <linux/kdev_t.h>
25#include <linux/major.h>
26#include <linux/string.h>
27#include <linux/init.h>
28#include <linux/interrupt.h>
29#include <linux/console.h>
30#include <linux/spinlock.h>
31#include <linux/root_dev.h>
Bob Breuera8cbdce2006-06-20 00:28:33 -070032#include <linux/cpu.h>
Christoph Hellwig1eeb66a2007-05-08 00:27:03 -070033#include <linux/kdebug.h>
Paul Gortmaker7b64db62011-07-18 15:57:46 -040034#include <linux/export.h>
Sam Ravnborg4efb55e2012-05-25 21:20:08 +000035#include <linux/start_kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <asm/io.h>
38#include <asm/processor.h>
39#include <asm/oplib.h>
40#include <asm/page.h>
41#include <asm/pgtable.h>
42#include <asm/traps.h>
43#include <asm/vaddrs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <asm/mbus.h>
45#include <asm/idprom.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <asm/cpudata.h>
47#include <asm/setup.h>
David Howellsd550bbd2012-03-28 18:30:03 +010048#include <asm/cacheflush.h>
Sam Ravnborg5b8b93c2012-05-25 21:20:09 +000049#include <asm/sections.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Sam Ravnborg53ae3412008-12-07 00:02:08 -080051#include "kernel.h"
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053struct screen_info screen_info = {
54 0, 0, /* orig-x, orig-y */
55 0, /* unused */
56 0, /* orig-video-page */
57 0, /* orig-video-mode */
58 128, /* orig-video-cols */
59 0,0,0, /* ega_ax, ega_bx, ega_cx */
60 54, /* orig-video-lines */
61 0, /* orig-video-isVGA */
62 16 /* orig-video-points */
63};
64
65/* Typing sync at the prom prompt calls the function pointed to by
66 * romvec->pv_synchook which I set to the following function.
67 * This should sync all filesystems and return, for now it just
68 * prints out pretty messages and returns.
69 */
70
71extern unsigned long trapbase;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73/* Pretty sick eh? */
Adrian Bunkc61c65c2008-06-05 11:40:58 -070074static void prom_sync_me(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070075{
76 unsigned long prom_tbr, flags;
77
78 /* XXX Badly broken. FIX! - Anton */
79 local_irq_save(flags);
80 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
81 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
82 "nop\n\t"
83 "nop\n\t"
84 "nop\n\t" : : "r" (&trapbase));
85
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 prom_printf("PROM SYNC COMMAND...\n");
David Rientjes7bf02ea2011-05-24 17:11:16 -070087 show_free_areas(0);
Paul E. McKenney29f043a2011-11-10 15:56:46 -080088 if (!is_idle_task(current)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 local_irq_enable();
90 sys_sync();
91 local_irq_disable();
92 }
93 prom_printf("Returning to prom\n");
94
95 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
96 "nop\n\t"
97 "nop\n\t"
98 "nop\n\t" : : "r" (prom_tbr));
99 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100}
101
Adrian Bunkc61c65c2008-06-05 11:40:58 -0700102static unsigned int boot_flags __initdata = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#define BOOTME_DEBUG 0x1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
105/* Exported for mm/init.c:paging_init. */
106unsigned long cmdline_memory_size __initdata = 0;
107
Daniel Hellstrom5fcafb72011-04-21 04:20:23 +0000108/* which CPU booted us (0xff = not set) */
109unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
Daniel Hellstrom5fcafb72011-04-21 04:20:23 +0000110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111static void
112prom_console_write(struct console *con, const char *s, unsigned n)
113{
114 prom_write(s, n);
115}
116
Sam Ravnborg7671fa22011-04-21 15:47:35 -0700117static struct console prom_early_console = {
118 .name = "earlyprom",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 .write = prom_console_write,
Sam Ravnborg7671fa22011-04-21 15:47:35 -0700120 .flags = CON_PRINTBUFFER | CON_BOOT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 .index = -1,
122};
123
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124/*
125 * Process kernel command line switches that are specific to the
126 * SPARC or that require special low-level processing.
127 */
128static void __init process_switch(char c)
129{
130 switch (c) {
131 case 'd':
132 boot_flags |= BOOTME_DEBUG;
133 break;
134 case 's':
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 break;
136 case 'h':
137 prom_printf("boot_flags_init: Halt!\n");
138 prom_halt();
139 break;
140 case 'p':
David S. Miller11032c12011-09-21 12:48:06 -0700141 prom_early_console.flags &= ~CON_BOOT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 break;
143 default:
144 printk("Unknown boot switch (-%c)\n", c);
145 break;
146 }
147}
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149static void __init boot_flags_init(char *commands)
150{
151 while (*commands) {
152 /* Move to the start of the next "argument". */
153 while (*commands && *commands == ' ')
154 commands++;
155
156 /* Process any command switches, otherwise skip it. */
157 if (*commands == '\0')
158 break;
159 if (*commands == '-') {
160 commands++;
161 while (*commands && *commands != ' ')
162 process_switch(*commands++);
163 continue;
164 }
David S. Millerc73fcc82007-07-20 16:59:26 -0700165 if (!strncmp(commands, "mem=", 4)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 /*
167 * "mem=XXX[kKmM] overrides the PROM-reported
168 * memory size.
169 */
170 cmdline_memory_size = simple_strtoul(commands + 4,
171 &commands, 0);
172 if (*commands == 'K' || *commands == 'k') {
173 cmdline_memory_size <<= 10;
174 commands++;
175 } else if (*commands=='M' || *commands=='m') {
176 cmdline_memory_size <<= 20;
177 commands++;
178 }
179 }
180 while (*commands && *commands != ' ')
181 commands++;
182 }
183}
184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185extern unsigned short root_flags;
186extern unsigned short root_dev;
187extern unsigned short ram_flags;
188#define RAMDISK_IMAGE_START_MASK 0x07FF
189#define RAMDISK_PROMPT_FLAG 0x8000
190#define RAMDISK_LOAD_FLAG 0x4000
191
192extern int root_mountflags;
193
194char reboot_command[COMMAND_LINE_SIZE];
Sam Ravnborg6943f3d2009-01-08 16:58:05 -0800195
David S. Millerc68e5d32012-05-13 23:09:04 -0700196struct cpuid_patch_entry {
197 unsigned int addr;
198 unsigned int sun4d[3];
199 unsigned int leon[3];
200};
201extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
202
203static void __init per_cpu_patch(void)
204{
205 struct cpuid_patch_entry *p;
206
207 if (sparc_cpu_model == sun4m) {
208 /* Nothing to do, this is what the unpatched code
209 * targets.
210 */
211 return;
212 }
213
214 p = &__cpuid_patch;
215 while (p < &__cpuid_patch_end) {
216 unsigned long addr = p->addr;
217 unsigned int *insns;
218
219 switch (sparc_cpu_model) {
220 case sun4d:
221 insns = &p->sun4d[0];
222 break;
223
224 case sparc_leon:
225 insns = &p->leon[0];
226 break;
227 default:
228 prom_printf("Unknown cpu type, halting.\n");
229 prom_halt();
230 }
231 *(unsigned int *) (addr + 0) = insns[0];
Sam Ravnborg1edc1782012-05-20 17:27:53 +0200232 flushi(addr + 0);
David S. Millerc68e5d32012-05-13 23:09:04 -0700233 *(unsigned int *) (addr + 4) = insns[1];
Sam Ravnborg1edc1782012-05-20 17:27:53 +0200234 flushi(addr + 4);
David S. Millerc68e5d32012-05-13 23:09:04 -0700235 *(unsigned int *) (addr + 8) = insns[2];
Sam Ravnborg1edc1782012-05-20 17:27:53 +0200236 flushi(addr + 8);
Sam Ravnborg9cd5f822012-05-20 17:24:20 +0200237
238 p++;
David S. Millerc68e5d32012-05-13 23:09:04 -0700239 }
David S. Millerc68e5d32012-05-13 23:09:04 -0700240}
241
Sam Ravnborg5b8b93c2012-05-25 21:20:09 +0000242struct leon_1insn_patch_entry {
243 unsigned int addr;
244 unsigned int insn;
245};
246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247enum sparc_cpu sparc_cpu_model;
Sam Ravnborg6943f3d2009-01-08 16:58:05 -0800248EXPORT_SYMBOL(sparc_cpu_model);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
Sam Ravnborg5b8b93c2012-05-25 21:20:09 +0000250static __init void leon_patch(void)
251{
252 struct leon_1insn_patch_entry *start = (void *)__leon_1insn_patch;
253 struct leon_1insn_patch_entry *end = (void *)__leon_1insn_patch_end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Sam Ravnborg5b8b93c2012-05-25 21:20:09 +0000255 /* Default instruction is leon - no patching */
256 if (sparc_cpu_model == sparc_leon)
257 return;
258
259 while (start < end) {
260 unsigned long addr = start->addr;
261
262 *(unsigned int *)(addr) = start->insn;
263 flushi(addr);
264
265 start++;
266 }
267}
268
269struct tt_entry *sparc_ttable;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270struct pt_regs fake_swapper_regs;
271
Sam Ravnborg4efb55e2012-05-25 21:20:08 +0000272/* Called from head_32.S - before we have setup anything
273 * in the kernel. Be very careful with what you do here.
274 */
275void __init sparc32_start_kernel(struct linux_romvec *rp)
276{
277 prom_init(rp);
Sam Ravnborg5b8b93c2012-05-25 21:20:09 +0000278
279 /* Set sparc_cpu_model */
280 sparc_cpu_model = sun_unknown;
281 if (!strcmp(&cputypval[0], "sun4m"))
282 sparc_cpu_model = sun4m;
283 if (!strcmp(&cputypval[0], "sun4s"))
284 sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
285 if (!strcmp(&cputypval[0], "sun4d"))
286 sparc_cpu_model = sun4d;
287 if (!strcmp(&cputypval[0], "sun4e"))
288 sparc_cpu_model = sun4e;
289 if (!strcmp(&cputypval[0], "sun4u"))
290 sparc_cpu_model = sun4u;
291 if (!strncmp(&cputypval[0], "leon" , 4))
292 sparc_cpu_model = sparc_leon;
293
294 leon_patch();
Sam Ravnborg4efb55e2012-05-25 21:20:08 +0000295 start_kernel();
296}
297
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298void __init setup_arch(char **cmdline_p)
299{
300 int i;
301 unsigned long highest_paddr;
302
Sam Ravnborge405ae72011-01-04 11:39:11 +0000303 sparc_ttable = (struct tt_entry *) &trapbase;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305 /* Initialize PROM console and command line. */
306 *cmdline_p = prom_getbootargs();
Alon Bar-Lev08e7ca12007-02-12 00:54:21 -0800307 strcpy(boot_command_line, *cmdline_p);
David S. Miller3fbe36d2008-09-10 23:40:32 -0700308 parse_early_param();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
Sam Ravnborg7671fa22011-04-21 15:47:35 -0700310 boot_flags_init(*cmdline_p);
311
312 register_console(&prom_early_console);
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 printk("ARCH: ");
315 switch(sparc_cpu_model) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 case sun4m:
317 printk("SUN4M\n");
318 break;
319 case sun4d:
320 printk("SUN4D\n");
321 break;
322 case sun4e:
323 printk("SUN4E\n");
324 break;
325 case sun4u:
326 printk("SUN4U\n");
327 break;
Konrad Eisele0fd7ef12009-08-17 00:13:31 +0000328 case sparc_leon:
329 printk("LEON\n");
330 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 default:
332 printk("UNKNOWN!\n");
333 break;
Joe Perches6cb79b32011-06-03 14:45:23 +0000334 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
336#ifdef CONFIG_DUMMY_CONSOLE
337 conswitchp = &dummy_con;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 idprom_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 load_mmu();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 phys_base = 0xffffffffUL;
344 highest_paddr = 0UL;
345 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
346 unsigned long top;
347
348 if (sp_banks[i].base_addr < phys_base)
349 phys_base = sp_banks[i].base_addr;
350 top = sp_banks[i].base_addr +
351 sp_banks[i].num_bytes;
352 if (highest_paddr < top)
353 highest_paddr = top;
354 }
355 pfn_base = phys_base >> PAGE_SHIFT;
356
357 if (!root_flags)
358 root_mountflags &= ~MS_RDONLY;
359 ROOT_DEV = old_decode_dev(root_dev);
Al Viro5d2170a2006-06-22 14:47:14 -0700360#ifdef CONFIG_BLK_DEV_RAM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
362 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
363 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
364#endif
365
366 prom_setsync(prom_sync_me);
367
368 if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
369 ((*(short *)linux_dbvec) != -1)) {
370 printk("Booted under KADB. Syncing trap table.\n");
371 (*(linux_dbvec->teach_debugger))();
372 }
373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 init_task.thread.kregs = &fake_swapper_regs;
375
Sam Ravnborg1edc1782012-05-20 17:27:53 +0200376 /* Run-time patch instructions to match the cpu model */
David S. Millerc68e5d32012-05-13 23:09:04 -0700377 per_cpu_patch();
378
Sam Ravnborg1edc1782012-05-20 17:27:53 +0200379 paging_init();
380
Krzysztof Helta23b4232006-08-25 00:46:02 -0700381 smp_setup_cpu_possible_map();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382}
383
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384extern int stop_a_enabled;
385
386void sun_do_break(void)
387{
388 if (!stop_a_enabled)
389 return;
390
391 printk("\n");
392 flush_user_windows();
393
394 prom_cmdline();
395}
Sam Ravnborg6943f3d2009-01-08 16:58:05 -0800396EXPORT_SYMBOL(sun_do_break);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398int stop_a_enabled = 1;
Bob Breuera8cbdce2006-06-20 00:28:33 -0700399
400static int __init topology_init(void)
401{
402 int i, ncpus, err;
403
404 /* Count the number of physically present processors in
405 * the machine, even on uniprocessor, so that /proc/cpuinfo
406 * output is consistent with 2.4.x
407 */
408 ncpus = 0;
409 while (!cpu_find_by_instance(ncpus, NULL, NULL))
410 ncpus++;
411 ncpus_probed = ncpus;
412
413 err = 0;
414 for_each_online_cpu(i) {
415 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
416 if (!p)
417 err = -ENOMEM;
418 else
Andrew Morton94583772006-06-29 02:24:27 -0700419 register_cpu(p, i);
Bob Breuera8cbdce2006-06-20 00:28:33 -0700420 }
421
422 return err;
423}
424
425subsys_initcall(topology_init);