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