Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
[linux-2.6] / arch / sparc64 / kernel / setup.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
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 | CON_ANYTIME,
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         parse_early_param();
285
286         boot_flags_init(*cmdline_p);
287         register_console(&prom_early_console);
288
289         if (tlb_type == hypervisor)
290                 printk("ARCH: SUN4V\n");
291         else
292                 printk("ARCH: SUN4U\n");
293
294 #ifdef CONFIG_DUMMY_CONSOLE
295         conswitchp = &dummy_con;
296 #elif defined(CONFIG_PROM_CONSOLE)
297         conswitchp = &prom_con;
298 #endif
299
300         idprom_init();
301
302         if (!root_flags)
303                 root_mountflags &= ~MS_RDONLY;
304         ROOT_DEV = old_decode_dev(root_dev);
305 #ifdef CONFIG_BLK_DEV_RAM
306         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
307         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
308         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);     
309 #endif
310
311         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
312
313 #ifdef CONFIG_IP_PNP
314         if (!ic_set_manually) {
315                 int chosen = prom_finddevice ("/chosen");
316                 u32 cl, sv, gw;
317                 
318                 cl = prom_getintdefault (chosen, "client-ip", 0);
319                 sv = prom_getintdefault (chosen, "server-ip", 0);
320                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
321                 if (cl && sv) {
322                         ic_myaddr = cl;
323                         ic_servaddr = sv;
324                         if (gw)
325                                 ic_gateway = gw;
326 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
327                         ic_proto_enabled = 0;
328 #endif
329                 }
330         }
331 #endif
332
333         /* Get boot processor trap_block[] setup.  */
334         init_cur_cpu_trap(current_thread_info());
335
336         paging_init();
337 }
338
339 /* BUFFER is PAGE_SIZE bytes long. */
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;