Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / arch / sparc / kernel / setup_64.c
1 /*
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 #include "entry.h"
55 #include "kernel.h"
56
57 /* Used to synchronize accesses to NatSemi SUPER I/O chip configure
58  * operations in asm/ns87303.h
59  */
60 DEFINE_SPINLOCK(ns87303_lock);
61 EXPORT_SYMBOL(ns87303_lock);
62
63 struct screen_info screen_info = {
64         0, 0,                   /* orig-x, orig-y */
65         0,                      /* unused */
66         0,                      /* orig-video-page */
67         0,                      /* orig-video-mode */
68         128,                    /* orig-video-cols */
69         0, 0, 0,                /* unused, ega_bx, unused */
70         54,                     /* orig-video-lines */
71         0,                      /* orig-video-isVGA */
72         16                      /* orig-video-points */
73 };
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 /* Exported for mm/init.c:paging_init. */
82 unsigned long cmdline_memory_size = 0;
83
84 static struct console prom_early_console = {
85         .name =         "earlyprom",
86         .write =        prom_console_write,
87         .flags =        CON_PRINTBUFFER | CON_BOOT | CON_ANYTIME,
88         .index =        -1,
89 };
90
91 /* 
92  * Process kernel command line switches that are specific to the
93  * SPARC or that require special low-level processing.
94  */
95 static void __init process_switch(char c)
96 {
97         switch (c) {
98         case 'd':
99         case 's':
100                 break;
101         case 'h':
102                 prom_printf("boot_flags_init: Halt!\n");
103                 prom_halt();
104                 break;
105         case 'p':
106                 /* Just ignore, this behavior is now the default.  */
107                 break;
108         case 'P':
109                 /* Force UltraSPARC-III P-Cache on. */
110                 if (tlb_type != cheetah) {
111                         printk("BOOT: Ignoring P-Cache force option.\n");
112                         break;
113                 }
114                 cheetah_pcache_forced_on = 1;
115                 add_taint(TAINT_MACHINE_CHECK);
116                 cheetah_enable_pcache();
117                 break;
118
119         default:
120                 printk("Unknown boot switch (-%c)\n", c);
121                 break;
122         }
123 }
124
125 static void __init boot_flags_init(char *commands)
126 {
127         while (*commands) {
128                 /* Move to the start of the next "argument". */
129                 while (*commands && *commands == ' ')
130                         commands++;
131
132                 /* Process any command switches, otherwise skip it. */
133                 if (*commands == '\0')
134                         break;
135                 if (*commands == '-') {
136                         commands++;
137                         while (*commands && *commands != ' ')
138                                 process_switch(*commands++);
139                         continue;
140                 }
141                 if (!strncmp(commands, "mem=", 4)) {
142                         /*
143                          * "mem=XXX[kKmM]" overrides the PROM-reported
144                          * memory size.
145                          */
146                         cmdline_memory_size = simple_strtoul(commands + 4,
147                                                              &commands, 0);
148                         if (*commands == 'K' || *commands == 'k') {
149                                 cmdline_memory_size <<= 10;
150                                 commands++;
151                         } else if (*commands=='M' || *commands=='m') {
152                                 cmdline_memory_size <<= 20;
153                                 commands++;
154                         }
155                 }
156                 while (*commands && *commands != ' ')
157                         commands++;
158         }
159 }
160
161 extern unsigned short root_flags;
162 extern unsigned short root_dev;
163 extern unsigned short ram_flags;
164 #define RAMDISK_IMAGE_START_MASK        0x07FF
165 #define RAMDISK_PROMPT_FLAG             0x8000
166 #define RAMDISK_LOAD_FLAG               0x4000
167
168 extern int root_mountflags;
169
170 char reboot_command[COMMAND_LINE_SIZE];
171
172 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
173
174 void __init per_cpu_patch(void)
175 {
176         struct cpuid_patch_entry *p;
177         unsigned long ver;
178         int is_jbus;
179
180         if (tlb_type == spitfire && !this_is_starfire)
181                 return;
182
183         is_jbus = 0;
184         if (tlb_type != hypervisor) {
185                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
186                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
187                            (ver >> 32UL) == __SERRANO_ID);
188         }
189
190         p = &__cpuid_patch;
191         while (p < &__cpuid_patch_end) {
192                 unsigned long addr = p->addr;
193                 unsigned int *insns;
194
195                 switch (tlb_type) {
196                 case spitfire:
197                         insns = &p->starfire[0];
198                         break;
199                 case cheetah:
200                 case cheetah_plus:
201                         if (is_jbus)
202                                 insns = &p->cheetah_jbus[0];
203                         else
204                                 insns = &p->cheetah_safari[0];
205                         break;
206                 case hypervisor:
207                         insns = &p->sun4v[0];
208                         break;
209                 default:
210                         prom_printf("Unknown cpu type, halting.\n");
211                         prom_halt();
212                 };
213
214                 *(unsigned int *) (addr +  0) = insns[0];
215                 wmb();
216                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
217
218                 *(unsigned int *) (addr +  4) = insns[1];
219                 wmb();
220                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
221
222                 *(unsigned int *) (addr +  8) = insns[2];
223                 wmb();
224                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
225
226                 *(unsigned int *) (addr + 12) = insns[3];
227                 wmb();
228                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
229
230                 p++;
231         }
232 }
233
234 void __init sun4v_patch(void)
235 {
236         extern void sun4v_hvapi_init(void);
237         struct sun4v_1insn_patch_entry *p1;
238         struct sun4v_2insn_patch_entry *p2;
239
240         if (tlb_type != hypervisor)
241                 return;
242
243         p1 = &__sun4v_1insn_patch;
244         while (p1 < &__sun4v_1insn_patch_end) {
245                 unsigned long addr = p1->addr;
246
247                 *(unsigned int *) (addr +  0) = p1->insn;
248                 wmb();
249                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
250
251                 p1++;
252         }
253
254         p2 = &__sun4v_2insn_patch;
255         while (p2 < &__sun4v_2insn_patch_end) {
256                 unsigned long addr = p2->addr;
257
258                 *(unsigned int *) (addr +  0) = p2->insns[0];
259                 wmb();
260                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
261
262                 *(unsigned int *) (addr +  4) = p2->insns[1];
263                 wmb();
264                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
265
266                 p2++;
267         }
268
269         sun4v_hvapi_init();
270 }
271
272 #ifdef CONFIG_SMP
273 void __init boot_cpu_id_too_large(int cpu)
274 {
275         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
276                     cpu, NR_CPUS);
277         prom_halt();
278 }
279 #endif
280
281 void __init setup_arch(char **cmdline_p)
282 {
283         /* Initialize PROM console and command line. */
284         *cmdline_p = prom_getbootargs();
285         strcpy(boot_command_line, *cmdline_p);
286         parse_early_param();
287
288         boot_flags_init(*cmdline_p);
289         register_console(&prom_early_console);
290
291         if (tlb_type == hypervisor)
292                 printk("ARCH: SUN4V\n");
293         else
294                 printk("ARCH: SUN4U\n");
295
296 #ifdef CONFIG_DUMMY_CONSOLE
297         conswitchp = &dummy_con;
298 #elif defined(CONFIG_PROM_CONSOLE)
299         conswitchp = &prom_con;
300 #endif
301
302         idprom_init();
303
304         if (!root_flags)
305                 root_mountflags &= ~MS_RDONLY;
306         ROOT_DEV = old_decode_dev(root_dev);
307 #ifdef CONFIG_BLK_DEV_RAM
308         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
309         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
310         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);     
311 #endif
312
313         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
314
315 #ifdef CONFIG_IP_PNP
316         if (!ic_set_manually) {
317                 int chosen = prom_finddevice ("/chosen");
318                 u32 cl, sv, gw;
319                 
320                 cl = prom_getintdefault (chosen, "client-ip", 0);
321                 sv = prom_getintdefault (chosen, "server-ip", 0);
322                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
323                 if (cl && sv) {
324                         ic_myaddr = cl;
325                         ic_servaddr = sv;
326                         if (gw)
327                                 ic_gateway = gw;
328 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
329                         ic_proto_enabled = 0;
330 #endif
331                 }
332         }
333 #endif
334
335         /* Get boot processor trap_block[] setup.  */
336         init_cur_cpu_trap(current_thread_info());
337
338         paging_init();
339 }
340
341 /* BUFFER is PAGE_SIZE bytes long. */
342
343 extern void smp_info(struct seq_file *);
344 extern void smp_bogo(struct seq_file *);
345 extern void mmu_info(struct seq_file *);
346
347 unsigned int dcache_parity_tl1_occurred;
348 unsigned int icache_parity_tl1_occurred;
349
350 int ncpus_probed;
351
352 static int show_cpuinfo(struct seq_file *m, void *__unused)
353 {
354         seq_printf(m, 
355                    "cpu\t\t: %s\n"
356                    "fpu\t\t: %s\n"
357                    "prom\t\t: %s\n"
358                    "type\t\t: %s\n"
359                    "ncpus probed\t: %d\n"
360                    "ncpus active\t: %d\n"
361                    "D$ parity tl1\t: %u\n"
362                    "I$ parity tl1\t: %u\n"
363 #ifndef CONFIG_SMP
364                    "Cpu0ClkTck\t: %016lx\n"
365 #endif
366                    ,
367                    sparc_cpu_type,
368                    sparc_fpu_type,
369                    prom_version,
370                    ((tlb_type == hypervisor) ?
371                     "sun4v" :
372                     "sun4u"),
373                    ncpus_probed,
374                    num_online_cpus(),
375                    dcache_parity_tl1_occurred,
376                    icache_parity_tl1_occurred
377 #ifndef CONFIG_SMP
378                    , cpu_data(0).clock_tick
379 #endif
380                 );
381 #ifdef CONFIG_SMP
382         smp_bogo(m);
383 #endif
384         mmu_info(m);
385 #ifdef CONFIG_SMP
386         smp_info(m);
387 #endif
388         return 0;
389 }
390
391 static void *c_start(struct seq_file *m, loff_t *pos)
392 {
393         /* The pointer we are returning is arbitrary,
394          * it just has to be non-NULL and not IS_ERR
395          * in the success case.
396          */
397         return *pos == 0 ? &c_start : NULL;
398 }
399
400 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
401 {
402         ++*pos;
403         return c_start(m, pos);
404 }
405
406 static void c_stop(struct seq_file *m, void *v)
407 {
408 }
409
410 const struct seq_operations cpuinfo_op = {
411         .start =c_start,
412         .next = c_next,
413         .stop = c_stop,
414         .show = show_cpuinfo,
415 };
416
417 extern int stop_a_enabled;
418
419 void sun_do_break(void)
420 {
421         if (!stop_a_enabled)
422                 return;
423
424         prom_printf("\n");
425         flush_user_windows();
426
427         prom_cmdline();
428 }
429 EXPORT_SYMBOL(sun_do_break);
430
431 int stop_a_enabled = 1;
432 EXPORT_SYMBOL(stop_a_enabled);