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