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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> |
1da177e4 | 34 | |
1da177e4 LT |
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> | |
1da177e4 LT |
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 | ||
53ae3419 SR |
49 | #include "kernel.h" |
50 | ||
1da177e4 LT |
51 | struct 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 | ||
69 | extern unsigned long trapbase; | |
1da177e4 LT |
70 | |
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); |
1da177e4 LT |
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); | |
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... */ | |
108 | unsigned char boot_cpu_id4; /* boot_cpu_id << 2 */ | |
109 | ||
1da177e4 LT |
110 | static void |
111 | prom_console_write(struct console *con, const char *s, unsigned n) | |
112 | { | |
113 | prom_write(s, n); | |
114 | } | |
115 | ||
7671fa22 SR |
116 | static struct console prom_early_console = { |
117 | .name = "earlyprom", | |
1da177e4 | 118 | .write = prom_console_write, |
7671fa22 | 119 | .flags = CON_PRINTBUFFER | CON_BOOT, |
1da177e4 LT |
120 | .index = -1, |
121 | }; | |
122 | ||
1da177e4 LT |
123 | /* |
124 | * Process kernel command line switches that are specific to the | |
125 | * SPARC or that require special low-level processing. | |
126 | */ | |
127 | static void __init process_switch(char c) | |
128 | { | |
129 | switch (c) { | |
130 | case 'd': | |
131 | boot_flags |= BOOTME_DEBUG; | |
132 | break; | |
133 | case 's': | |
1da177e4 LT |
134 | break; |
135 | case 'h': | |
136 | prom_printf("boot_flags_init: Halt!\n"); | |
137 | prom_halt(); | |
138 | break; | |
139 | case 'p': | |
7671fa22 | 140 | /* Just ignore, this behavior is now the default. */ |
1da177e4 LT |
141 | break; |
142 | default: | |
143 | printk("Unknown boot switch (-%c)\n", c); | |
144 | break; | |
145 | } | |
146 | } | |
147 | ||
1da177e4 LT |
148 | static 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 | } | |
c73fcc84 | 164 | if (!strncmp(commands, "mem=", 4)) { |
1da177e4 LT |
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 | |
9f2b2a5f | 186 | * also be where SMP things happen. |
1da177e4 LT |
187 | */ |
188 | ||
1da177e4 | 189 | extern void sun4c_probe_vac(void); |
1da177e4 LT |
190 | |
191 | extern unsigned short root_flags; | |
192 | extern unsigned short root_dev; | |
193 | extern unsigned short ram_flags; | |
194 | #define RAMDISK_IMAGE_START_MASK 0x07FF | |
195 | #define RAMDISK_PROMPT_FLAG 0x8000 | |
196 | #define RAMDISK_LOAD_FLAG 0x4000 | |
197 | ||
198 | extern int root_mountflags; | |
199 | ||
200 | char reboot_command[COMMAND_LINE_SIZE]; | |
6943f3da | 201 | |
1da177e4 | 202 | enum sparc_cpu sparc_cpu_model; |
6943f3da | 203 | EXPORT_SYMBOL(sparc_cpu_model); |
1da177e4 LT |
204 | |
205 | struct tt_entry *sparc_ttable; | |
206 | ||
207 | struct pt_regs fake_swapper_regs; | |
208 | ||
1da177e4 LT |
209 | void __init setup_arch(char **cmdline_p) |
210 | { | |
211 | int i; | |
212 | unsigned long highest_paddr; | |
213 | ||
e405ae76 | 214 | sparc_ttable = (struct tt_entry *) &trapbase; |
1da177e4 LT |
215 | |
216 | /* Initialize PROM console and command line. */ | |
217 | *cmdline_p = prom_getbootargs(); | |
08e7ca11 | 218 | strcpy(boot_command_line, *cmdline_p); |
3fbe36d8 | 219 | parse_early_param(); |
1da177e4 | 220 | |
7671fa22 SR |
221 | boot_flags_init(*cmdline_p); |
222 | ||
223 | register_console(&prom_early_console); | |
224 | ||
1da177e4 LT |
225 | /* Set sparc_cpu_model */ |
226 | sparc_cpu_model = sun_unknown; | |
b7afdb7e | 227 | if (!strcmp(&cputypval[0], "sun4 ")) |
365b50f0 | 228 | sparc_cpu_model = sun4; |
b7afdb7e | 229 | if (!strcmp(&cputypval[0], "sun4c")) |
365b50f0 | 230 | sparc_cpu_model = sun4c; |
b7afdb7e | 231 | if (!strcmp(&cputypval[0], "sun4m")) |
365b50f0 | 232 | sparc_cpu_model = sun4m; |
b7afdb7e | 233 | if (!strcmp(&cputypval[0], "sun4s")) |
365b50f0 | 234 | sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */ |
b7afdb7e | 235 | if (!strcmp(&cputypval[0], "sun4d")) |
365b50f0 | 236 | sparc_cpu_model = sun4d; |
b7afdb7e | 237 | if (!strcmp(&cputypval[0], "sun4e")) |
365b50f0 | 238 | sparc_cpu_model = sun4e; |
b7afdb7e | 239 | if (!strcmp(&cputypval[0], "sun4u")) |
365b50f0 | 240 | sparc_cpu_model = sun4u; |
b7afdb7e | 241 | if (!strncmp(&cputypval[0], "leon" , 4)) |
0fd7ef1f | 242 | sparc_cpu_model = sparc_leon; |
1da177e4 | 243 | |
1da177e4 LT |
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; | |
0fd7ef1f KE |
264 | case sparc_leon: |
265 | printk("LEON\n"); | |
266 | break; | |
1da177e4 LT |
267 | default: |
268 | printk("UNKNOWN!\n"); | |
269 | break; | |
270 | }; | |
271 | ||
272 | #ifdef CONFIG_DUMMY_CONSOLE | |
273 | conswitchp = &dummy_con; | |
1da177e4 | 274 | #endif |
1da177e4 LT |
275 | |
276 | idprom_init(); | |
5110bd21 | 277 | if (ARCH_SUN4C) |
1da177e4 LT |
278 | sun4c_probe_vac(); |
279 | load_mmu(); | |
1da177e4 LT |
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); | |
5d2170ad | 298 | #ifdef CONFIG_BLK_DEV_RAM |
1da177e4 LT |
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(); | |
a23b423e KH |
316 | |
317 | smp_setup_cpu_possible_map(); | |
1da177e4 LT |
318 | } |
319 | ||
1da177e4 LT |
320 | extern int stop_a_enabled; |
321 | ||
322 | void 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 | } | |
6943f3da | 332 | EXPORT_SYMBOL(sun_do_break); |
1da177e4 | 333 | |
1da177e4 | 334 | int stop_a_enabled = 1; |
a8cbdcea BB |
335 | |
336 | static 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 | |
94583779 | 355 | register_cpu(p, i); |
a8cbdcea BB |
356 | } |
357 | ||
358 | return err; | |
359 | } | |
360 | ||
361 | subsys_initcall(topology_init); |