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 <asm/smp.h>
16 #include <linux/user.h>
17 #include <linux/screen_info.h>
18 #include <linux/delay.h>
19 #include <linux/fs.h>
20 #include <linux/seq_file.h>
21 #include <linux/syscalls.h>
22 #include <linux/kdev_t.h>
23 #include <linux/major.h>
24 #include <linux/string.h>
25 #include <linux/init.h>
26 #include <linux/inet.h>
27 #include <linux/console.h>
28 #include <linux/root_dev.h>
29 #include <linux/interrupt.h>
30 #include <linux/cpu.h>
31 #include <linux/initrd.h>
32
33 #include <asm/system.h>
34 #include <asm/io.h>
35 #include <asm/processor.h>
36 #include <asm/oplib.h>
37 #include <asm/page.h>
38 #include <asm/pgtable.h>
39 #include <asm/idprom.h>
40 #include <asm/head.h>
41 #include <asm/starfire.h>
42 #include <asm/mmu_context.h>
43 #include <asm/timer.h>
44 #include <asm/sections.h>
45 #include <asm/setup.h>
46 #include <asm/mmu.h>
47 #include <asm/ns87303.h>
48 #include <asm/btext.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
prom_console_write(struct console * con,const char * s,unsigned n)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 */
process_switch(char c)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
boot_flags_init(char * commands)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
per_cpu_patch(void)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
sun4v_patch(void)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
boot_cpu_id_too_large(int cpu)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
setup_arch(char ** cmdline_p)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 #ifdef CONFIG_EARLYFB
290 if (btext_find_display())
291 #endif
292 register_console(&prom_early_console);
293
294 if (tlb_type == hypervisor)
295 printk("ARCH: SUN4V\n");
296 else
297 printk("ARCH: SUN4U\n");
298
299 #ifdef CONFIG_DUMMY_CONSOLE
300 conswitchp = &dummy_con;
301 #endif
302
303 idprom_init();
304
305 if (!root_flags)
306 root_mountflags &= ~MS_RDONLY;
307 ROOT_DEV = old_decode_dev(root_dev);
308 #ifdef CONFIG_BLK_DEV_RAM
309 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
310 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
311 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
312 #endif
313
314 task_thread_info(&init_task)->kregs = &fake_swapper_regs;
315
316 #ifdef CONFIG_IP_PNP
317 if (!ic_set_manually) {
318 phandle chosen = prom_finddevice("/chosen");
319 u32 cl, sv, gw;
320
321 cl = prom_getintdefault (chosen, "client-ip", 0);
322 sv = prom_getintdefault (chosen, "server-ip", 0);
323 gw = prom_getintdefault (chosen, "gateway-ip", 0);
324 if (cl && sv) {
325 ic_myaddr = cl;
326 ic_servaddr = sv;
327 if (gw)
328 ic_gateway = gw;
329 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
330 ic_proto_enabled = 0;
331 #endif
332 }
333 }
334 #endif
335
336 /* Get boot processor trap_block[] setup. */
337 init_cur_cpu_trap(current_thread_info());
338
339 paging_init();
340 }
341
342 /* BUFFER is PAGE_SIZE bytes long. */
343
344 extern void smp_info(struct seq_file *);
345 extern void smp_bogo(struct seq_file *);
346 extern void mmu_info(struct seq_file *);
347
348 unsigned int dcache_parity_tl1_occurred;
349 unsigned int icache_parity_tl1_occurred;
350
351 int ncpus_probed;
352
show_cpuinfo(struct seq_file * m,void * __unused)353 static int show_cpuinfo(struct seq_file *m, void *__unused)
354 {
355 seq_printf(m,
356 "cpu\t\t: %s\n"
357 "fpu\t\t: %s\n"
358 "pmu\t\t: %s\n"
359 "prom\t\t: %s\n"
360 "type\t\t: %s\n"
361 "ncpus probed\t: %d\n"
362 "ncpus active\t: %d\n"
363 "D$ parity tl1\t: %u\n"
364 "I$ parity tl1\t: %u\n"
365 #ifndef CONFIG_SMP
366 "Cpu0ClkTck\t: %016lx\n"
367 #endif
368 ,
369 sparc_cpu_type,
370 sparc_fpu_type,
371 sparc_pmu_type,
372 prom_version,
373 ((tlb_type == hypervisor) ?
374 "sun4v" :
375 "sun4u"),
376 ncpus_probed,
377 num_online_cpus(),
378 dcache_parity_tl1_occurred,
379 icache_parity_tl1_occurred
380 #ifndef CONFIG_SMP
381 , cpu_data(0).clock_tick
382 #endif
383 );
384 #ifdef CONFIG_SMP
385 smp_bogo(m);
386 #endif
387 mmu_info(m);
388 #ifdef CONFIG_SMP
389 smp_info(m);
390 #endif
391 return 0;
392 }
393
c_start(struct seq_file * m,loff_t * pos)394 static void *c_start(struct seq_file *m, loff_t *pos)
395 {
396 /* The pointer we are returning is arbitrary,
397 * it just has to be non-NULL and not IS_ERR
398 * in the success case.
399 */
400 return *pos == 0 ? &c_start : NULL;
401 }
402
c_next(struct seq_file * m,void * v,loff_t * pos)403 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
404 {
405 ++*pos;
406 return c_start(m, pos);
407 }
408
c_stop(struct seq_file * m,void * v)409 static void c_stop(struct seq_file *m, void *v)
410 {
411 }
412
413 const struct seq_operations cpuinfo_op = {
414 .start =c_start,
415 .next = c_next,
416 .stop = c_stop,
417 .show = show_cpuinfo,
418 };
419
420 extern int stop_a_enabled;
421
sun_do_break(void)422 void sun_do_break(void)
423 {
424 if (!stop_a_enabled)
425 return;
426
427 prom_printf("\n");
428 flush_user_windows();
429
430 prom_cmdline();
431 }
432 EXPORT_SYMBOL(sun_do_break);
433
434 int stop_a_enabled = 1;
435 EXPORT_SYMBOL(stop_a_enabled);
436