Commit | Line | Data |
---|---|---|
88278ca2 | 1 | /* |
1da177e4 LT |
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> | |
894673ee | 19 | #include <linux/screen_info.h> |
1da177e4 | 20 | #include <linux/delay.h> |
1da177e4 LT |
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> | |
a8cbdcea | 32 | #include <linux/cpu.h> |
1eeb66a1 | 33 | #include <linux/kdebug.h> |
7b64db60 | 34 | #include <linux/export.h> |
4efb55e6 | 35 | #include <linux/start_kernel.h> |
1da177e4 | 36 | |
1da177e4 LT |
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> | |
1da177e4 LT |
44 | #include <asm/mbus.h> |
45 | #include <asm/idprom.h> | |
1da177e4 LT |
46 | #include <asm/cpudata.h> |
47 | #include <asm/setup.h> | |
d550bbd4 | 48 | #include <asm/cacheflush.h> |
5b8b93c4 | 49 | #include <asm/sections.h> |
1da177e4 | 50 | |
53ae3419 SR |
51 | #include "kernel.h" |
52 | ||
1da177e4 LT |
53 | struct 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 | ||
1da177e4 | 71 | /* Pretty sick eh? */ |
c61c65cd | 72 | static void prom_sync_me(void) |
1da177e4 LT |
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 | ||
1da177e4 | 84 | prom_printf("PROM SYNC COMMAND...\n"); |
7bf02ea2 | 85 | show_free_areas(0); |
29f043a2 | 86 | if (!is_idle_task(current)) { |
1da177e4 LT |
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); | |
1da177e4 LT |
98 | } |
99 | ||
c61c65cd | 100 | static unsigned int boot_flags __initdata = 0; |
1da177e4 | 101 | #define BOOTME_DEBUG 0x1 |
1da177e4 LT |
102 | |
103 | /* Exported for mm/init.c:paging_init. */ | |
104 | unsigned long cmdline_memory_size __initdata = 0; | |
105 | ||
5fcafb7a DH |
106 | /* which CPU booted us (0xff = not set) */ |
107 | unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */ | |
5fcafb7a | 108 | |
1da177e4 | 109 | static void |
9ef595d8 | 110 | prom_console_write(struct console *con, const char *s, unsigned int n) |
1da177e4 LT |
111 | { |
112 | prom_write(s, n); | |
113 | } | |
114 | ||
7671fa22 SR |
115 | static struct console prom_early_console = { |
116 | .name = "earlyprom", | |
1da177e4 | 117 | .write = prom_console_write, |
7671fa22 | 118 | .flags = CON_PRINTBUFFER | CON_BOOT, |
1da177e4 LT |
119 | .index = -1, |
120 | }; | |
121 | ||
1da177e4 LT |
122 | /* |
123 | * Process kernel command line switches that are specific to the | |
124 | * SPARC or that require special low-level processing. | |
125 | */ | |
126 | static void __init process_switch(char c) | |
127 | { | |
128 | switch (c) { | |
129 | case 'd': | |
130 | boot_flags |= BOOTME_DEBUG; | |
131 | break; | |
132 | case 's': | |
1da177e4 LT |
133 | break; |
134 | case 'h': | |
135 | prom_printf("boot_flags_init: Halt!\n"); | |
136 | prom_halt(); | |
137 | break; | |
138 | case 'p': | |
11032c17 | 139 | prom_early_console.flags &= ~CON_BOOT; |
1da177e4 LT |
140 | break; |
141 | default: | |
142 | printk("Unknown boot switch (-%c)\n", c); | |
143 | break; | |
144 | } | |
145 | } | |
146 | ||
1da177e4 LT |
147 | static void __init boot_flags_init(char *commands) |
148 | { | |
149 | while (*commands) { | |
150 | /* Move to the start of the next "argument". */ | |
151 | while (*commands && *commands == ' ') | |
152 | commands++; | |
153 | ||
154 | /* Process any command switches, otherwise skip it. */ | |
155 | if (*commands == '\0') | |
156 | break; | |
157 | if (*commands == '-') { | |
158 | commands++; | |
159 | while (*commands && *commands != ' ') | |
160 | process_switch(*commands++); | |
161 | continue; | |
162 | } | |
c73fcc84 | 163 | if (!strncmp(commands, "mem=", 4)) { |
1da177e4 LT |
164 | /* |
165 | * "mem=XXX[kKmM] overrides the PROM-reported | |
166 | * memory size. | |
167 | */ | |
168 | cmdline_memory_size = simple_strtoul(commands + 4, | |
169 | &commands, 0); | |
170 | if (*commands == 'K' || *commands == 'k') { | |
171 | cmdline_memory_size <<= 10; | |
172 | commands++; | |
173 | } else if (*commands=='M' || *commands=='m') { | |
174 | cmdline_memory_size <<= 20; | |
175 | commands++; | |
176 | } | |
177 | } | |
178 | while (*commands && *commands != ' ') | |
179 | commands++; | |
180 | } | |
181 | } | |
182 | ||
1da177e4 LT |
183 | extern unsigned short root_flags; |
184 | extern unsigned short root_dev; | |
185 | extern unsigned short ram_flags; | |
186 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
187 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
188 | #define RAMDISK_LOAD_FLAG 0x4000 | |
189 | ||
190 | extern int root_mountflags; | |
191 | ||
192 | char reboot_command[COMMAND_LINE_SIZE]; | |
6943f3da | 193 | |
c68e5d39 DM |
194 | struct cpuid_patch_entry { |
195 | unsigned int addr; | |
196 | unsigned int sun4d[3]; | |
197 | unsigned int leon[3]; | |
198 | }; | |
199 | extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end; | |
200 | ||
201 | static void __init per_cpu_patch(void) | |
202 | { | |
203 | struct cpuid_patch_entry *p; | |
204 | ||
205 | if (sparc_cpu_model == sun4m) { | |
206 | /* Nothing to do, this is what the unpatched code | |
207 | * targets. | |
208 | */ | |
209 | return; | |
210 | } | |
211 | ||
212 | p = &__cpuid_patch; | |
213 | while (p < &__cpuid_patch_end) { | |
214 | unsigned long addr = p->addr; | |
215 | unsigned int *insns; | |
216 | ||
217 | switch (sparc_cpu_model) { | |
218 | case sun4d: | |
219 | insns = &p->sun4d[0]; | |
220 | break; | |
221 | ||
222 | case sparc_leon: | |
223 | insns = &p->leon[0]; | |
224 | break; | |
225 | default: | |
226 | prom_printf("Unknown cpu type, halting.\n"); | |
227 | prom_halt(); | |
228 | } | |
229 | *(unsigned int *) (addr + 0) = insns[0]; | |
1edc1783 | 230 | flushi(addr + 0); |
c68e5d39 | 231 | *(unsigned int *) (addr + 4) = insns[1]; |
1edc1783 | 232 | flushi(addr + 4); |
c68e5d39 | 233 | *(unsigned int *) (addr + 8) = insns[2]; |
1edc1783 | 234 | flushi(addr + 8); |
9cd5f822 SR |
235 | |
236 | p++; | |
c68e5d39 | 237 | } |
c68e5d39 DM |
238 | } |
239 | ||
5b8b93c4 SR |
240 | struct leon_1insn_patch_entry { |
241 | unsigned int addr; | |
242 | unsigned int insn; | |
243 | }; | |
244 | ||
1da177e4 | 245 | enum sparc_cpu sparc_cpu_model; |
6943f3da | 246 | EXPORT_SYMBOL(sparc_cpu_model); |
1da177e4 | 247 | |
5b8b93c4 SR |
248 | static __init void leon_patch(void) |
249 | { | |
250 | struct leon_1insn_patch_entry *start = (void *)__leon_1insn_patch; | |
251 | struct leon_1insn_patch_entry *end = (void *)__leon_1insn_patch_end; | |
252 | ||
253 | /* Default instruction is leon - no patching */ | |
254 | if (sparc_cpu_model == sparc_leon) | |
255 | return; | |
256 | ||
257 | while (start < end) { | |
258 | unsigned long addr = start->addr; | |
259 | ||
260 | *(unsigned int *)(addr) = start->insn; | |
261 | flushi(addr); | |
262 | ||
263 | start++; | |
264 | } | |
265 | } | |
1da177e4 | 266 | |
5b8b93c4 | 267 | struct tt_entry *sparc_ttable; |
d191723f | 268 | static struct pt_regs fake_swapper_regs; |
1da177e4 | 269 | |
4efb55e6 SR |
270 | /* Called from head_32.S - before we have setup anything |
271 | * in the kernel. Be very careful with what you do here. | |
272 | */ | |
273 | void __init sparc32_start_kernel(struct linux_romvec *rp) | |
274 | { | |
275 | prom_init(rp); | |
5b8b93c4 SR |
276 | |
277 | /* Set sparc_cpu_model */ | |
278 | sparc_cpu_model = sun_unknown; | |
279 | if (!strcmp(&cputypval[0], "sun4m")) | |
280 | sparc_cpu_model = sun4m; | |
281 | if (!strcmp(&cputypval[0], "sun4s")) | |
282 | sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */ | |
283 | if (!strcmp(&cputypval[0], "sun4d")) | |
284 | sparc_cpu_model = sun4d; | |
285 | if (!strcmp(&cputypval[0], "sun4e")) | |
286 | sparc_cpu_model = sun4e; | |
287 | if (!strcmp(&cputypval[0], "sun4u")) | |
288 | sparc_cpu_model = sun4u; | |
289 | if (!strncmp(&cputypval[0], "leon" , 4)) | |
290 | sparc_cpu_model = sparc_leon; | |
291 | ||
292 | leon_patch(); | |
4efb55e6 SR |
293 | start_kernel(); |
294 | } | |
295 | ||
1da177e4 LT |
296 | void __init setup_arch(char **cmdline_p) |
297 | { | |
298 | int i; | |
299 | unsigned long highest_paddr; | |
300 | ||
3c46e2d6 | 301 | sparc_ttable = &trapbase; |
1da177e4 LT |
302 | |
303 | /* Initialize PROM console and command line. */ | |
304 | *cmdline_p = prom_getbootargs(); | |
117a0c5f | 305 | strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE); |
3fbe36d8 | 306 | parse_early_param(); |
1da177e4 | 307 | |
7671fa22 SR |
308 | boot_flags_init(*cmdline_p); |
309 | ||
310 | register_console(&prom_early_console); | |
311 | ||
1da177e4 LT |
312 | printk("ARCH: "); |
313 | switch(sparc_cpu_model) { | |
1da177e4 LT |
314 | case sun4m: |
315 | printk("SUN4M\n"); | |
316 | break; | |
317 | case sun4d: | |
318 | printk("SUN4D\n"); | |
319 | break; | |
320 | case sun4e: | |
321 | printk("SUN4E\n"); | |
322 | break; | |
323 | case sun4u: | |
324 | printk("SUN4U\n"); | |
325 | break; | |
0fd7ef1f KE |
326 | case sparc_leon: |
327 | printk("LEON\n"); | |
328 | break; | |
1da177e4 LT |
329 | default: |
330 | printk("UNKNOWN!\n"); | |
331 | break; | |
6cb79b3f | 332 | } |
1da177e4 LT |
333 | |
334 | #ifdef CONFIG_DUMMY_CONSOLE | |
335 | conswitchp = &dummy_con; | |
1da177e4 | 336 | #endif |
1da177e4 LT |
337 | |
338 | idprom_init(); | |
1da177e4 | 339 | load_mmu(); |
1da177e4 LT |
340 | |
341 | phys_base = 0xffffffffUL; | |
342 | highest_paddr = 0UL; | |
343 | for (i = 0; sp_banks[i].num_bytes != 0; i++) { | |
344 | unsigned long top; | |
345 | ||
346 | if (sp_banks[i].base_addr < phys_base) | |
347 | phys_base = sp_banks[i].base_addr; | |
348 | top = sp_banks[i].base_addr + | |
349 | sp_banks[i].num_bytes; | |
350 | if (highest_paddr < top) | |
351 | highest_paddr = top; | |
352 | } | |
353 | pfn_base = phys_base >> PAGE_SHIFT; | |
354 | ||
355 | if (!root_flags) | |
356 | root_mountflags &= ~MS_RDONLY; | |
357 | ROOT_DEV = old_decode_dev(root_dev); | |
5d2170ad | 358 | #ifdef CONFIG_BLK_DEV_RAM |
1da177e4 LT |
359 | rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; |
360 | rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); | |
361 | rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); | |
362 | #endif | |
363 | ||
364 | prom_setsync(prom_sync_me); | |
365 | ||
d191723f | 366 | if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) && |
1da177e4 LT |
367 | ((*(short *)linux_dbvec) != -1)) { |
368 | printk("Booted under KADB. Syncing trap table.\n"); | |
369 | (*(linux_dbvec->teach_debugger))(); | |
370 | } | |
371 | ||
1da177e4 LT |
372 | init_task.thread.kregs = &fake_swapper_regs; |
373 | ||
1edc1783 | 374 | /* Run-time patch instructions to match the cpu model */ |
c68e5d39 DM |
375 | per_cpu_patch(); |
376 | ||
1edc1783 SR |
377 | paging_init(); |
378 | ||
a23b423e | 379 | smp_setup_cpu_possible_map(); |
1da177e4 LT |
380 | } |
381 | ||
1da177e4 LT |
382 | extern int stop_a_enabled; |
383 | ||
384 | void sun_do_break(void) | |
385 | { | |
386 | if (!stop_a_enabled) | |
387 | return; | |
388 | ||
389 | printk("\n"); | |
390 | flush_user_windows(); | |
391 | ||
392 | prom_cmdline(); | |
393 | } | |
6943f3da | 394 | EXPORT_SYMBOL(sun_do_break); |
1da177e4 | 395 | |
1da177e4 | 396 | int stop_a_enabled = 1; |
a8cbdcea BB |
397 | |
398 | static int __init topology_init(void) | |
399 | { | |
400 | int i, ncpus, err; | |
401 | ||
402 | /* Count the number of physically present processors in | |
403 | * the machine, even on uniprocessor, so that /proc/cpuinfo | |
404 | * output is consistent with 2.4.x | |
405 | */ | |
406 | ncpus = 0; | |
407 | while (!cpu_find_by_instance(ncpus, NULL, NULL)) | |
408 | ncpus++; | |
409 | ncpus_probed = ncpus; | |
410 | ||
411 | err = 0; | |
412 | for_each_online_cpu(i) { | |
413 | struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); | |
414 | if (!p) | |
415 | err = -ENOMEM; | |
416 | else | |
94583779 | 417 | register_cpu(p, i); |
a8cbdcea BB |
418 | } |
419 | ||
420 | return err; | |
421 | } | |
422 | ||
423 | subsys_initcall(topology_init); |