[SPARC]: Constify function pointer tables.
[linux-2.6.git] / arch / sparc64 / kernel / setup.c
1 /*  $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $
2  *  linux/arch/sparc64/kernel/setup.c
3  *
4  *  Copyright (C) 1995,1996  David S. Miller (davem@caip.rutgers.edu)
5  *  Copyright (C) 1997       Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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 <asm/smp.h>
17 #include <linux/user.h>
18 #include <linux/a.out.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/inet.h>
29 #include <linux/console.h>
30 #include <linux/root_dev.h>
31 #include <linux/interrupt.h>
32 #include <linux/cpu.h>
33 #include <linux/initrd.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/idprom.h>
42 #include <asm/head.h>
43 #include <asm/starfire.h>
44 #include <asm/mmu_context.h>
45 #include <asm/timer.h>
46 #include <asm/sections.h>
47 #include <asm/setup.h>
48 #include <asm/mmu.h>
49 #include <asm/ns87303.h>
50
51 #ifdef CONFIG_IP_PNP
52 #include <net/ipconfig.h>
53 #endif
54
55 /* Used to synchronize accesses to NatSemi SUPER I/O chip configure
56  * operations in asm/ns87303.h
57  */
58 DEFINE_SPINLOCK(ns87303_lock);
59
60 struct screen_info screen_info = {
61         0, 0,                   /* orig-x, orig-y */
62         0,                      /* unused */
63         0,                      /* orig-video-page */
64         0,                      /* orig-video-mode */
65         128,                    /* orig-video-cols */
66         0, 0, 0,                /* unused, ega_bx, unused */
67         54,                     /* orig-video-lines */
68         0,                      /* orig-video-isVGA */
69         16                      /* orig-video-points */
70 };
71
72 void (*prom_palette)(int);
73 void (*prom_keyboard)(void);
74
75 static void
76 prom_console_write(struct console *con, const char *s, unsigned n)
77 {
78         prom_write(s, n);
79 }
80
81 unsigned int boot_flags = 0;
82 #define BOOTME_DEBUG  0x1
83
84 /* Exported for mm/init.c:paging_init. */
85 unsigned long cmdline_memory_size = 0;
86
87 static struct console prom_debug_console = {
88         .name =         "debug",
89         .write =        prom_console_write,
90         .flags =        CON_PRINTBUFFER,
91         .index =        -1,
92 };
93
94 /* XXX Implement this at some point... */
95 void kernel_enter_debugger(void)
96 {
97 }
98
99 /* 
100  * Process kernel command line switches that are specific to the
101  * SPARC or that require special low-level processing.
102  */
103 static void __init process_switch(char c)
104 {
105         switch (c) {
106         case 'd':
107                 boot_flags |= BOOTME_DEBUG;
108                 break;
109         case 's':
110                 break;
111         case 'h':
112                 prom_printf("boot_flags_init: Halt!\n");
113                 prom_halt();
114                 break;
115         case 'p':
116                 /* Use PROM debug console. */
117                 register_console(&prom_debug_console);
118                 break;
119         case 'P':
120                 /* Force UltraSPARC-III P-Cache on. */
121                 if (tlb_type != cheetah) {
122                         printk("BOOT: Ignoring P-Cache force option.\n");
123                         break;
124                 }
125                 cheetah_pcache_forced_on = 1;
126                 add_taint(TAINT_MACHINE_CHECK);
127                 cheetah_enable_pcache();
128                 break;
129
130         default:
131                 printk("Unknown boot switch (-%c)\n", c);
132                 break;
133         }
134 }
135
136 static void __init boot_flags_init(char *commands)
137 {
138         while (*commands) {
139                 /* Move to the start of the next "argument". */
140                 while (*commands && *commands == ' ')
141                         commands++;
142
143                 /* Process any command switches, otherwise skip it. */
144                 if (*commands == '\0')
145                         break;
146                 if (*commands == '-') {
147                         commands++;
148                         while (*commands && *commands != ' ')
149                                 process_switch(*commands++);
150                         continue;
151                 }
152                 if (!strncmp(commands, "mem=", 4)) {
153                         /*
154                          * "mem=XXX[kKmM]" overrides the PROM-reported
155                          * memory size.
156                          */
157                         cmdline_memory_size = simple_strtoul(commands + 4,
158                                                              &commands, 0);
159                         if (*commands == 'K' || *commands == 'k') {
160                                 cmdline_memory_size <<= 10;
161                                 commands++;
162                         } else if (*commands=='M' || *commands=='m') {
163                                 cmdline_memory_size <<= 20;
164                                 commands++;
165                         }
166                 }
167                 while (*commands && *commands != ' ')
168                         commands++;
169         }
170 }
171
172 extern void panic_setup(char *, int *);
173
174 extern unsigned short root_flags;
175 extern unsigned short root_dev;
176 extern unsigned short ram_flags;
177 #define RAMDISK_IMAGE_START_MASK        0x07FF
178 #define RAMDISK_PROMPT_FLAG             0x8000
179 #define RAMDISK_LOAD_FLAG               0x4000
180
181 extern int root_mountflags;
182
183 char reboot_command[COMMAND_LINE_SIZE];
184
185 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
186
187 void __init per_cpu_patch(void)
188 {
189         struct cpuid_patch_entry *p;
190         unsigned long ver;
191         int is_jbus;
192
193         if (tlb_type == spitfire && !this_is_starfire)
194                 return;
195
196         is_jbus = 0;
197         if (tlb_type != hypervisor) {
198                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
199                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
200                            (ver >> 32UL) == __SERRANO_ID);
201         }
202
203         p = &__cpuid_patch;
204         while (p < &__cpuid_patch_end) {
205                 unsigned long addr = p->addr;
206                 unsigned int *insns;
207
208                 switch (tlb_type) {
209                 case spitfire:
210                         insns = &p->starfire[0];
211                         break;
212                 case cheetah:
213                 case cheetah_plus:
214                         if (is_jbus)
215                                 insns = &p->cheetah_jbus[0];
216                         else
217                                 insns = &p->cheetah_safari[0];
218                         break;
219                 case hypervisor:
220                         insns = &p->sun4v[0];
221                         break;
222                 default:
223                         prom_printf("Unknown cpu type, halting.\n");
224                         prom_halt();
225                 };
226
227                 *(unsigned int *) (addr +  0) = insns[0];
228                 wmb();
229                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
230
231                 *(unsigned int *) (addr +  4) = insns[1];
232                 wmb();
233                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
234
235                 *(unsigned int *) (addr +  8) = insns[2];
236                 wmb();
237                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
238
239                 *(unsigned int *) (addr + 12) = insns[3];
240                 wmb();
241                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
242
243                 p++;
244         }
245 }
246
247 void __init sun4v_patch(void)
248 {
249         extern void sun4v_hvapi_init(void);
250         struct sun4v_1insn_patch_entry *p1;
251         struct sun4v_2insn_patch_entry *p2;
252
253         if (tlb_type != hypervisor)
254                 return;
255
256         p1 = &__sun4v_1insn_patch;
257         while (p1 < &__sun4v_1insn_patch_end) {
258                 unsigned long addr = p1->addr;
259
260                 *(unsigned int *) (addr +  0) = p1->insn;
261                 wmb();
262                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
263
264                 p1++;
265         }
266
267         p2 = &__sun4v_2insn_patch;
268         while (p2 < &__sun4v_2insn_patch_end) {
269                 unsigned long addr = p2->addr;
270
271                 *(unsigned int *) (addr +  0) = p2->insns[0];
272                 wmb();
273                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
274
275                 *(unsigned int *) (addr +  4) = p2->insns[1];
276                 wmb();
277                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
278
279                 p2++;
280         }
281
282         sun4v_hvapi_init();
283 }
284
285 #ifdef CONFIG_SMP
286 void __init boot_cpu_id_too_large(int cpu)
287 {
288         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
289                     cpu, NR_CPUS);
290         prom_halt();
291 }
292 #endif
293
294 void __init setup_arch(char **cmdline_p)
295 {
296         /* Initialize PROM console and command line. */
297         *cmdline_p = prom_getbootargs();
298         strcpy(boot_command_line, *cmdline_p);
299
300         if (tlb_type == hypervisor)
301                 printk("ARCH: SUN4V\n");
302         else
303                 printk("ARCH: SUN4U\n");
304
305 #ifdef CONFIG_DUMMY_CONSOLE
306         conswitchp = &dummy_con;
307 #elif defined(CONFIG_PROM_CONSOLE)
308         conswitchp = &prom_con;
309 #endif
310
311         boot_flags_init(*cmdline_p);
312
313         idprom_init();
314
315         if (!root_flags)
316                 root_mountflags &= ~MS_RDONLY;
317         ROOT_DEV = old_decode_dev(root_dev);
318 #ifdef CONFIG_BLK_DEV_RAM
319         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
320         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
321         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);     
322 #endif
323
324         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
325
326 #ifdef CONFIG_IP_PNP
327         if (!ic_set_manually) {
328                 int chosen = prom_finddevice ("/chosen");
329                 u32 cl, sv, gw;
330                 
331                 cl = prom_getintdefault (chosen, "client-ip", 0);
332                 sv = prom_getintdefault (chosen, "server-ip", 0);
333                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
334                 if (cl && sv) {
335                         ic_myaddr = cl;
336                         ic_servaddr = sv;
337                         if (gw)
338                                 ic_gateway = gw;
339 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
340                         ic_proto_enabled = 0;
341 #endif
342                 }
343         }
344 #endif
345
346         /* Get boot processor trap_block[] setup.  */
347         init_cur_cpu_trap(current_thread_info());
348
349         paging_init();
350 }
351
352 /* BUFFER is PAGE_SIZE bytes long. */
353
354 extern char *sparc_cpu_type;
355 extern char *sparc_fpu_type;
356
357 extern void smp_info(struct seq_file *);
358 extern void smp_bogo(struct seq_file *);
359 extern void mmu_info(struct seq_file *);
360
361 unsigned int dcache_parity_tl1_occurred;
362 unsigned int icache_parity_tl1_occurred;
363
364 int ncpus_probed;
365
366 static int show_cpuinfo(struct seq_file *m, void *__unused)
367 {
368         seq_printf(m, 
369                    "cpu\t\t: %s\n"
370                    "fpu\t\t: %s\n"
371                    "prom\t\t: %s\n"
372                    "type\t\t: %s\n"
373                    "ncpus probed\t: %d\n"
374                    "ncpus active\t: %d\n"
375                    "D$ parity tl1\t: %u\n"
376                    "I$ parity tl1\t: %u\n"
377 #ifndef CONFIG_SMP
378                    "Cpu0ClkTck\t: %016lx\n"
379 #endif
380                    ,
381                    sparc_cpu_type,
382                    sparc_fpu_type,
383                    prom_version,
384                    ((tlb_type == hypervisor) ?
385                     "sun4v" :
386                     "sun4u"),
387                    ncpus_probed,
388                    num_online_cpus(),
389                    dcache_parity_tl1_occurred,
390                    icache_parity_tl1_occurred
391 #ifndef CONFIG_SMP
392                    , cpu_data(0).clock_tick
393 #endif
394                 );
395 #ifdef CONFIG_SMP
396         smp_bogo(m);
397 #endif
398         mmu_info(m);
399 #ifdef CONFIG_SMP
400         smp_info(m);
401 #endif
402         return 0;
403 }
404
405 static void *c_start(struct seq_file *m, loff_t *pos)
406 {
407         /* The pointer we are returning is arbitrary,
408          * it just has to be non-NULL and not IS_ERR
409          * in the success case.
410          */
411         return *pos == 0 ? &c_start : NULL;
412 }
413
414 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
415 {
416         ++*pos;
417         return c_start(m, pos);
418 }
419
420 static void c_stop(struct seq_file *m, void *v)
421 {
422 }
423
424 const struct seq_operations cpuinfo_op = {
425         .start =c_start,
426         .next = c_next,
427         .stop = c_stop,
428         .show = show_cpuinfo,
429 };
430
431 extern int stop_a_enabled;
432
433 void sun_do_break(void)
434 {
435         if (!stop_a_enabled)
436                 return;
437
438         prom_printf("\n");
439         flush_user_windows();
440
441         prom_cmdline();
442 }
443
444 int stop_a_enabled = 1;