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