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Commit | Line | Data |
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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 | ||
71 | extern unsigned long trapbase; | |
1da177e4 LT |
72 | |
73 | /* Pretty sick eh? */ | |
c61c65cd | 74 | static void prom_sync_me(void) |
1da177e4 LT |
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 | ||
1da177e4 | 86 | prom_printf("PROM SYNC COMMAND...\n"); |
7bf02ea2 | 87 | show_free_areas(0); |
29f043a2 | 88 | if (!is_idle_task(current)) { |
1da177e4 LT |
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); | |
1da177e4 LT |
100 | } |
101 | ||
c61c65cd | 102 | static unsigned int boot_flags __initdata = 0; |
1da177e4 | 103 | #define BOOTME_DEBUG 0x1 |
1da177e4 LT |
104 | |
105 | /* Exported for mm/init.c:paging_init. */ | |
106 | unsigned long cmdline_memory_size __initdata = 0; | |
107 | ||
5fcafb7a DH |
108 | /* which CPU booted us (0xff = not set) */ |
109 | unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */ | |
5fcafb7a | 110 | |
1da177e4 LT |
111 | static void |
112 | prom_console_write(struct console *con, const char *s, unsigned n) | |
113 | { | |
114 | prom_write(s, n); | |
115 | } | |
116 | ||
7671fa22 SR |
117 | static struct console prom_early_console = { |
118 | .name = "earlyprom", | |
1da177e4 | 119 | .write = prom_console_write, |
7671fa22 | 120 | .flags = CON_PRINTBUFFER | CON_BOOT, |
1da177e4 LT |
121 | .index = -1, |
122 | }; | |
123 | ||
1da177e4 LT |
124 | /* |
125 | * Process kernel command line switches that are specific to the | |
126 | * SPARC or that require special low-level processing. | |
127 | */ | |
128 | static void __init process_switch(char c) | |
129 | { | |
130 | switch (c) { | |
131 | case 'd': | |
132 | boot_flags |= BOOTME_DEBUG; | |
133 | break; | |
134 | case 's': | |
1da177e4 LT |
135 | break; |
136 | case 'h': | |
137 | prom_printf("boot_flags_init: Halt!\n"); | |
138 | prom_halt(); | |
139 | break; | |
140 | case 'p': | |
11032c17 | 141 | prom_early_console.flags &= ~CON_BOOT; |
1da177e4 LT |
142 | break; |
143 | default: | |
144 | printk("Unknown boot switch (-%c)\n", c); | |
145 | break; | |
146 | } | |
147 | } | |
148 | ||
1da177e4 LT |
149 | static 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 | } | |
c73fcc84 | 165 | if (!strncmp(commands, "mem=", 4)) { |
1da177e4 LT |
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 | ||
1da177e4 LT |
185 | extern unsigned short root_flags; |
186 | extern unsigned short root_dev; | |
187 | extern unsigned short ram_flags; | |
188 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
189 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
190 | #define RAMDISK_LOAD_FLAG 0x4000 | |
191 | ||
192 | extern int root_mountflags; | |
193 | ||
194 | char reboot_command[COMMAND_LINE_SIZE]; | |
6943f3da | 195 | |
c68e5d39 DM |
196 | struct cpuid_patch_entry { |
197 | unsigned int addr; | |
198 | unsigned int sun4d[3]; | |
199 | unsigned int leon[3]; | |
200 | }; | |
201 | extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end; | |
202 | ||
203 | static 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]; | |
1edc1783 | 232 | flushi(addr + 0); |
c68e5d39 | 233 | *(unsigned int *) (addr + 4) = insns[1]; |
1edc1783 | 234 | flushi(addr + 4); |
c68e5d39 | 235 | *(unsigned int *) (addr + 8) = insns[2]; |
1edc1783 | 236 | flushi(addr + 8); |
9cd5f822 SR |
237 | |
238 | p++; | |
c68e5d39 | 239 | } |
c68e5d39 DM |
240 | } |
241 | ||
5b8b93c4 SR |
242 | struct leon_1insn_patch_entry { |
243 | unsigned int addr; | |
244 | unsigned int insn; | |
245 | }; | |
246 | ||
1da177e4 | 247 | enum sparc_cpu sparc_cpu_model; |
6943f3da | 248 | EXPORT_SYMBOL(sparc_cpu_model); |
1da177e4 | 249 | |
5b8b93c4 SR |
250 | static __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 | } | |
1da177e4 | 268 | |
5b8b93c4 | 269 | struct tt_entry *sparc_ttable; |
d191723f | 270 | static struct pt_regs fake_swapper_regs; |
1da177e4 | 271 | |
4efb55e6 SR |
272 | /* Called from head_32.S - before we have setup anything |
273 | * in the kernel. Be very careful with what you do here. | |
274 | */ | |
275 | void __init sparc32_start_kernel(struct linux_romvec *rp) | |
276 | { | |
277 | prom_init(rp); | |
5b8b93c4 SR |
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(); | |
4efb55e6 SR |
295 | start_kernel(); |
296 | } | |
297 | ||
1da177e4 LT |
298 | void __init setup_arch(char **cmdline_p) |
299 | { | |
300 | int i; | |
301 | unsigned long highest_paddr; | |
302 | ||
e405ae76 | 303 | sparc_ttable = (struct tt_entry *) &trapbase; |
1da177e4 LT |
304 | |
305 | /* Initialize PROM console and command line. */ | |
306 | *cmdline_p = prom_getbootargs(); | |
117a0c5f | 307 | strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE); |
3fbe36d8 | 308 | parse_early_param(); |
1da177e4 | 309 | |
7671fa22 SR |
310 | boot_flags_init(*cmdline_p); |
311 | ||
312 | register_console(&prom_early_console); | |
313 | ||
1da177e4 LT |
314 | printk("ARCH: "); |
315 | switch(sparc_cpu_model) { | |
1da177e4 LT |
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; | |
0fd7ef1f KE |
328 | case sparc_leon: |
329 | printk("LEON\n"); | |
330 | break; | |
1da177e4 LT |
331 | default: |
332 | printk("UNKNOWN!\n"); | |
333 | break; | |
6cb79b3f | 334 | } |
1da177e4 LT |
335 | |
336 | #ifdef CONFIG_DUMMY_CONSOLE | |
337 | conswitchp = &dummy_con; | |
1da177e4 | 338 | #endif |
1da177e4 LT |
339 | |
340 | idprom_init(); | |
1da177e4 | 341 | load_mmu(); |
1da177e4 LT |
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); | |
5d2170ad | 360 | #ifdef CONFIG_BLK_DEV_RAM |
1da177e4 LT |
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 | ||
d191723f | 368 | if((boot_flags & BOOTME_DEBUG) && (linux_dbvec != NULL) && |
1da177e4 LT |
369 | ((*(short *)linux_dbvec) != -1)) { |
370 | printk("Booted under KADB. Syncing trap table.\n"); | |
371 | (*(linux_dbvec->teach_debugger))(); | |
372 | } | |
373 | ||
1da177e4 LT |
374 | init_task.thread.kregs = &fake_swapper_regs; |
375 | ||
1edc1783 | 376 | /* Run-time patch instructions to match the cpu model */ |
c68e5d39 DM |
377 | per_cpu_patch(); |
378 | ||
1edc1783 SR |
379 | paging_init(); |
380 | ||
a23b423e | 381 | smp_setup_cpu_possible_map(); |
1da177e4 LT |
382 | } |
383 | ||
1da177e4 LT |
384 | extern int stop_a_enabled; |
385 | ||
386 | void 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 | } | |
6943f3da | 396 | EXPORT_SYMBOL(sun_do_break); |
1da177e4 | 397 | |
1da177e4 | 398 | int stop_a_enabled = 1; |
a8cbdcea BB |
399 | |
400 | static 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 | |
94583779 | 419 | register_cpu(p, i); |
a8cbdcea BB |
420 | } |
421 | ||
422 | return err; | |
423 | } | |
424 | ||
425 | subsys_initcall(topology_init); |