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1/*
2 * 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>
19#include <linux/screen_info.h>
20#include <linux/delay.h>
21#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>
32#include <linux/cpu.h>
33#include <linux/kdebug.h>
34#include <linux/export.h>
35#include <linux/start_kernel.h>
36
37#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>
44#include <asm/mbus.h>
45#include <asm/idprom.h>
46#include <asm/cpudata.h>
47#include <asm/setup.h>
48#include <asm/cacheflush.h>
49#include <asm/sections.h>
50
51#include "kernel.h"
52
53struct 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;
72
73/* Pretty sick eh? */
74static void prom_sync_me(void)
75{
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
86 prom_printf("PROM SYNC COMMAND...\n");
87 show_free_areas(0);
88 if (!is_idle_task(current)) {
89 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);
100}
101
102static unsigned int boot_flags __initdata = 0;
103#define BOOTME_DEBUG 0x1
104
105/* Exported for mm/init.c:paging_init. */
106unsigned long cmdline_memory_size __initdata = 0;
107
108/* which CPU booted us (0xff = not set) */
109unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
110
111static void
112prom_console_write(struct console *con, const char *s, unsigned n)
113{
114 prom_write(s, n);
115}
116
117static struct console prom_early_console = {
118 .name = "earlyprom",
119 .write = prom_console_write,
120 .flags = CON_PRINTBUFFER | CON_BOOT,
121 .index = -1,
122};
123
124/*
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':
135 break;
136 case 'h':
137 prom_printf("boot_flags_init: Halt!\n");
138 prom_halt();
139 break;
140 case 'p':
141 prom_early_console.flags &= ~CON_BOOT;
142 break;
143 default:
144 printk("Unknown boot switch (-%c)\n", c);
145 break;
146 }
147}
148
149static 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 }
165 if (!strncmp(commands, "mem=", 4)) {
166 /*
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
185extern 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];
195
196struct 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];
232 flushi(addr + 0);
233 *(unsigned int *) (addr + 4) = insns[1];
234 flushi(addr + 4);
235 *(unsigned int *) (addr + 8) = insns[2];
236 flushi(addr + 8);
237
238 p++;
239 }
240}
241
242struct leon_1insn_patch_entry {
243 unsigned int addr;
244 unsigned int insn;
245};
246
247enum sparc_cpu sparc_cpu_model;
248EXPORT_SYMBOL(sparc_cpu_model);
249
250static __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;
254
255 /* 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;
270struct pt_regs fake_swapper_regs;
271
272/* 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);
278
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();
295 start_kernel();
296}
297
298void __init setup_arch(char **cmdline_p)
299{
300 int i;
301 unsigned long highest_paddr;
302
303 sparc_ttable = (struct tt_entry *) &trapbase;
304
305 /* Initialize PROM console and command line. */
306 *cmdline_p = prom_getbootargs();
307 strcpy(boot_command_line, *cmdline_p);
308 parse_early_param();
309
310 boot_flags_init(*cmdline_p);
311
312 register_console(&prom_early_console);
313
314 printk("ARCH: ");
315 switch(sparc_cpu_model) {
316 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;
328 case sparc_leon:
329 printk("LEON\n");
330 break;
331 default:
332 printk("UNKNOWN!\n");
333 break;
334 }
335
336#ifdef CONFIG_DUMMY_CONSOLE
337 conswitchp = &dummy_con;
338#endif
339
340 idprom_init();
341 load_mmu();
342
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);
360#ifdef CONFIG_BLK_DEV_RAM
361 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
374 init_mm.context = (unsigned long) NO_CONTEXT;
375 init_task.thread.kregs = &fake_swapper_regs;
376
377 /* Run-time patch instructions to match the cpu model */
378 per_cpu_patch();
379
380 paging_init();
381
382 smp_setup_cpu_possible_map();
383}
384
385extern int stop_a_enabled;
386
387void sun_do_break(void)
388{
389 if (!stop_a_enabled)
390 return;
391
392 printk("\n");
393 flush_user_windows();
394
395 prom_cmdline();
396}
397EXPORT_SYMBOL(sun_do_break);
398
399int stop_a_enabled = 1;
400
401static int __init topology_init(void)
402{
403 int i, ncpus, err;
404
405 /* Count the number of physically present processors in
406 * the machine, even on uniprocessor, so that /proc/cpuinfo
407 * output is consistent with 2.4.x
408 */
409 ncpus = 0;
410 while (!cpu_find_by_instance(ncpus, NULL, NULL))
411 ncpus++;
412 ncpus_probed = ncpus;
413
414 err = 0;
415 for_each_online_cpu(i) {
416 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
417 if (!p)
418 err = -ENOMEM;
419 else
420 register_cpu(p, i);
421 }
422
423 return err;
424}
425
426subsys_initcall(topology_init);
1/*
2 * 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>
19#include <linux/screen_info.h>
20#include <linux/delay.h>
21#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>
32#include <linux/cpu.h>
33#include <linux/kdebug.h>
34
35#include <asm/system.h>
36#include <asm/io.h>
37#include <asm/processor.h>
38#include <asm/oplib.h>
39#include <asm/page.h>
40#include <asm/pgtable.h>
41#include <asm/traps.h>
42#include <asm/vaddrs.h>
43#include <asm/mbus.h>
44#include <asm/idprom.h>
45#include <asm/machines.h>
46#include <asm/cpudata.h>
47#include <asm/setup.h>
48
49#include "kernel.h"
50
51struct screen_info screen_info = {
52 0, 0, /* orig-x, orig-y */
53 0, /* unused */
54 0, /* orig-video-page */
55 0, /* orig-video-mode */
56 128, /* orig-video-cols */
57 0,0,0, /* ega_ax, ega_bx, ega_cx */
58 54, /* orig-video-lines */
59 0, /* orig-video-isVGA */
60 16 /* orig-video-points */
61};
62
63/* Typing sync at the prom prompt calls the function pointed to by
64 * romvec->pv_synchook which I set to the following function.
65 * This should sync all filesystems and return, for now it just
66 * prints out pretty messages and returns.
67 */
68
69extern unsigned long trapbase;
70
71/* Pretty sick eh? */
72static void prom_sync_me(void)
73{
74 unsigned long prom_tbr, flags;
75
76 /* XXX Badly broken. FIX! - Anton */
77 local_irq_save(flags);
78 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
79 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
80 "nop\n\t"
81 "nop\n\t"
82 "nop\n\t" : : "r" (&trapbase));
83
84 prom_printf("PROM SYNC COMMAND...\n");
85 show_free_areas(0);
86 if(current->pid != 0) {
87 local_irq_enable();
88 sys_sync();
89 local_irq_disable();
90 }
91 prom_printf("Returning to prom\n");
92
93 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
94 "nop\n\t"
95 "nop\n\t"
96 "nop\n\t" : : "r" (prom_tbr));
97 local_irq_restore(flags);
98}
99
100static unsigned int boot_flags __initdata = 0;
101#define BOOTME_DEBUG 0x1
102
103/* Exported for mm/init.c:paging_init. */
104unsigned long cmdline_memory_size __initdata = 0;
105
106/* which CPU booted us (0xff = not set) */
107unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
108unsigned char boot_cpu_id4; /* boot_cpu_id << 2 */
109
110static void
111prom_console_write(struct console *con, const char *s, unsigned n)
112{
113 prom_write(s, n);
114}
115
116static struct console prom_early_console = {
117 .name = "earlyprom",
118 .write = prom_console_write,
119 .flags = CON_PRINTBUFFER | CON_BOOT,
120 .index = -1,
121};
122
123/*
124 * Process kernel command line switches that are specific to the
125 * SPARC or that require special low-level processing.
126 */
127static void __init process_switch(char c)
128{
129 switch (c) {
130 case 'd':
131 boot_flags |= BOOTME_DEBUG;
132 break;
133 case 's':
134 break;
135 case 'h':
136 prom_printf("boot_flags_init: Halt!\n");
137 prom_halt();
138 break;
139 case 'p':
140 prom_early_console.flags &= ~CON_BOOT;
141 break;
142 default:
143 printk("Unknown boot switch (-%c)\n", c);
144 break;
145 }
146}
147
148static void __init boot_flags_init(char *commands)
149{
150 while (*commands) {
151 /* Move to the start of the next "argument". */
152 while (*commands && *commands == ' ')
153 commands++;
154
155 /* Process any command switches, otherwise skip it. */
156 if (*commands == '\0')
157 break;
158 if (*commands == '-') {
159 commands++;
160 while (*commands && *commands != ' ')
161 process_switch(*commands++);
162 continue;
163 }
164 if (!strncmp(commands, "mem=", 4)) {
165 /*
166 * "mem=XXX[kKmM] overrides the PROM-reported
167 * memory size.
168 */
169 cmdline_memory_size = simple_strtoul(commands + 4,
170 &commands, 0);
171 if (*commands == 'K' || *commands == 'k') {
172 cmdline_memory_size <<= 10;
173 commands++;
174 } else if (*commands=='M' || *commands=='m') {
175 cmdline_memory_size <<= 20;
176 commands++;
177 }
178 }
179 while (*commands && *commands != ' ')
180 commands++;
181 }
182}
183
184/* This routine will in the future do all the nasty prom stuff
185 * to probe for the mmu type and its parameters, etc. This will
186 * also be where SMP things happen.
187 */
188
189extern void sun4c_probe_vac(void);
190
191extern unsigned short root_flags;
192extern unsigned short root_dev;
193extern unsigned short ram_flags;
194#define RAMDISK_IMAGE_START_MASK 0x07FF
195#define RAMDISK_PROMPT_FLAG 0x8000
196#define RAMDISK_LOAD_FLAG 0x4000
197
198extern int root_mountflags;
199
200char reboot_command[COMMAND_LINE_SIZE];
201
202enum sparc_cpu sparc_cpu_model;
203EXPORT_SYMBOL(sparc_cpu_model);
204
205struct tt_entry *sparc_ttable;
206
207struct pt_regs fake_swapper_regs;
208
209void __init setup_arch(char **cmdline_p)
210{
211 int i;
212 unsigned long highest_paddr;
213
214 sparc_ttable = (struct tt_entry *) &trapbase;
215
216 /* Initialize PROM console and command line. */
217 *cmdline_p = prom_getbootargs();
218 strcpy(boot_command_line, *cmdline_p);
219 parse_early_param();
220
221 boot_flags_init(*cmdline_p);
222
223 register_console(&prom_early_console);
224
225 /* Set sparc_cpu_model */
226 sparc_cpu_model = sun_unknown;
227 if (!strcmp(&cputypval[0], "sun4 "))
228 sparc_cpu_model = sun4;
229 if (!strcmp(&cputypval[0], "sun4c"))
230 sparc_cpu_model = sun4c;
231 if (!strcmp(&cputypval[0], "sun4m"))
232 sparc_cpu_model = sun4m;
233 if (!strcmp(&cputypval[0], "sun4s"))
234 sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */
235 if (!strcmp(&cputypval[0], "sun4d"))
236 sparc_cpu_model = sun4d;
237 if (!strcmp(&cputypval[0], "sun4e"))
238 sparc_cpu_model = sun4e;
239 if (!strcmp(&cputypval[0], "sun4u"))
240 sparc_cpu_model = sun4u;
241 if (!strncmp(&cputypval[0], "leon" , 4))
242 sparc_cpu_model = sparc_leon;
243
244 printk("ARCH: ");
245 switch(sparc_cpu_model) {
246 case sun4:
247 printk("SUN4\n");
248 break;
249 case sun4c:
250 printk("SUN4C\n");
251 break;
252 case sun4m:
253 printk("SUN4M\n");
254 break;
255 case sun4d:
256 printk("SUN4D\n");
257 break;
258 case sun4e:
259 printk("SUN4E\n");
260 break;
261 case sun4u:
262 printk("SUN4U\n");
263 break;
264 case sparc_leon:
265 printk("LEON\n");
266 break;
267 default:
268 printk("UNKNOWN!\n");
269 break;
270 }
271
272#ifdef CONFIG_DUMMY_CONSOLE
273 conswitchp = &dummy_con;
274#endif
275
276 idprom_init();
277 if (ARCH_SUN4C)
278 sun4c_probe_vac();
279 load_mmu();
280
281 phys_base = 0xffffffffUL;
282 highest_paddr = 0UL;
283 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
284 unsigned long top;
285
286 if (sp_banks[i].base_addr < phys_base)
287 phys_base = sp_banks[i].base_addr;
288 top = sp_banks[i].base_addr +
289 sp_banks[i].num_bytes;
290 if (highest_paddr < top)
291 highest_paddr = top;
292 }
293 pfn_base = phys_base >> PAGE_SHIFT;
294
295 if (!root_flags)
296 root_mountflags &= ~MS_RDONLY;
297 ROOT_DEV = old_decode_dev(root_dev);
298#ifdef CONFIG_BLK_DEV_RAM
299 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
300 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
301 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
302#endif
303
304 prom_setsync(prom_sync_me);
305
306 if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) &&
307 ((*(short *)linux_dbvec) != -1)) {
308 printk("Booted under KADB. Syncing trap table.\n");
309 (*(linux_dbvec->teach_debugger))();
310 }
311
312 init_mm.context = (unsigned long) NO_CONTEXT;
313 init_task.thread.kregs = &fake_swapper_regs;
314
315 paging_init();
316
317 smp_setup_cpu_possible_map();
318}
319
320extern int stop_a_enabled;
321
322void sun_do_break(void)
323{
324 if (!stop_a_enabled)
325 return;
326
327 printk("\n");
328 flush_user_windows();
329
330 prom_cmdline();
331}
332EXPORT_SYMBOL(sun_do_break);
333
334int stop_a_enabled = 1;
335
336static int __init topology_init(void)
337{
338 int i, ncpus, err;
339
340 /* Count the number of physically present processors in
341 * the machine, even on uniprocessor, so that /proc/cpuinfo
342 * output is consistent with 2.4.x
343 */
344 ncpus = 0;
345 while (!cpu_find_by_instance(ncpus, NULL, NULL))
346 ncpus++;
347 ncpus_probed = ncpus;
348
349 err = 0;
350 for_each_online_cpu(i) {
351 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
352 if (!p)
353 err = -ENOMEM;
354 else
355 register_cpu(p, i);
356 }
357
358 return err;
359}
360
361subsys_initcall(topology_init);