1 /* $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $
2 * linux/arch/sparc64/kernel/setup.c
4 * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 #include <linux/errno.h>
9 #include <linux/sched.h>
10 #include <linux/kernel.h>
12 #include <linux/stddef.h>
13 #include <linux/unistd.h>
14 #include <linux/ptrace.h>
15 #include <linux/slab.h>
17 #include <linux/user.h>
18 #include <linux/a.out.h>
19 #include <linux/tty.h>
20 #include <linux/delay.h>
21 #include <linux/config.h>
23 #include <linux/seq_file.h>
24 #include <linux/syscalls.h>
25 #include <linux/kdev_t.h>
26 #include <linux/major.h>
27 #include <linux/string.h>
28 #include <linux/init.h>
29 #include <linux/inet.h>
30 #include <linux/console.h>
31 #include <linux/root_dev.h>
32 #include <linux/interrupt.h>
33 #include <linux/cpu.h>
34 #include <linux/initrd.h>
36 #include <asm/segment.h>
37 #include <asm/system.h>
39 #include <asm/processor.h>
40 #include <asm/oplib.h>
42 #include <asm/pgtable.h>
43 #include <asm/idprom.h>
45 #include <asm/starfire.h>
46 #include <asm/mmu_context.h>
47 #include <asm/timer.h>
48 #include <asm/sections.h>
49 #include <asm/setup.h>
52 #include <net/ipconfig.h>
55 struct screen_info screen_info = {
56 0, 0, /* orig-x, orig-y */
58 0, /* orig-video-page */
59 0, /* orig-video-mode */
60 128, /* orig-video-cols */
61 0, 0, 0, /* unused, ega_bx, unused */
62 54, /* orig-video-lines */
63 0, /* orig-video-isVGA */
64 16 /* orig-video-points */
67 /* Typing sync at the prom prompt calls the function pointed to by
68 * the sync callback which I set to the following function.
69 * This should sync all filesystems and return, for now it just
70 * prints out pretty messages and returns.
73 void (*prom_palette)(int);
74 void (*prom_keyboard)(void);
77 prom_console_write(struct console *con, const char *s, unsigned n)
82 static struct console prom_console = {
84 .write = prom_console_write,
85 .flags = CON_CONSDEV | CON_ENABLED,
93 int prom_callback(long *args)
95 struct console *cons, *saved_console = NULL;
98 extern spinlock_t prom_entry_lock;
102 if (!(cmd = (char *)args[0]))
106 * The callback can be invoked on the cpu that first dropped
107 * into prom_cmdline after taking the serial interrupt, or on
108 * a slave processor that was smp_captured() if the
109 * administrator has done a switch-cpu inside obp. In either
110 * case, the cpu is marked as in-interrupt. Drop IRQ locks.
114 /* XXX Revisit the locking here someday. This is a debugging
115 * XXX feature so it isnt all that critical. -DaveM
117 local_irq_save(flags);
119 spin_unlock(&prom_entry_lock);
120 cons = console_drivers;
122 unregister_console(cons);
123 cons->flags &= ~(CON_PRINTBUFFER);
124 cons->next = saved_console;
125 saved_console = cons;
126 cons = console_drivers;
128 register_console(&prom_console);
129 if (!strcmp(cmd, "sync")) {
130 prom_printf("PROM `%s' command...\n", cmd);
132 if (current->pid != 0) {
138 args[args[1] + 3] = -1;
139 prom_printf("Returning to PROM\n");
140 } else if (!strcmp(cmd, "va>tte-data")) {
141 unsigned long ctx, va;
142 unsigned long tte = 0;
143 long res = PROM_FALSE;
149 * Find process owning ctx, lookup mapping.
151 struct task_struct *p;
152 struct mm_struct *mm = NULL;
158 for_each_process(p) {
160 if (CTX_HWBITS(mm->context) == ctx)
164 CTX_HWBITS(mm->context) != ctx)
167 pgdp = pgd_offset(mm, va);
170 pudp = pud_offset(pgdp, va);
173 pmdp = pmd_offset(pudp, va);
177 /* Preemption implicitly disabled by virtue of
178 * being called from inside OBP.
180 ptep = pte_offset_map(pmdp, va);
181 if (pte_present(*ptep)) {
182 tte = pte_val(*ptep);
189 if ((va >= KERNBASE) && (va < (KERNBASE + (4 * 1024 * 1024)))) {
190 /* Spitfire Errata #32 workaround */
191 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
195 "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
198 * Locked down tlb entry.
201 if (tlb_type == spitfire)
202 tte = spitfire_get_dtlb_data(SPITFIRE_HIGHEST_LOCKED_TLBENT);
203 else if (tlb_type == cheetah || tlb_type == cheetah_plus)
204 tte = cheetah_get_ldtlb_data(CHEETAH_HIGHEST_LOCKED_TLBENT);
210 if (va < PGDIR_SIZE) {
212 * vmalloc or prom_inherited mapping.
220 if ((va >= LOW_OBP_ADDRESS) && (va < HI_OBP_ADDRESS)) {
221 tte = prom_virt_to_phys(va, &error);
226 pgdp = pgd_offset_k(va);
229 pudp = pud_offset(pgdp, va);
232 pmdp = pmd_offset(pudp, va);
236 /* Preemption implicitly disabled by virtue of
237 * being called from inside OBP.
239 ptep = pte_offset_kernel(pmdp, va);
240 if (pte_present(*ptep)) {
241 tte = pte_val(*ptep);
247 if (va < PAGE_OFFSET) {
254 if (va & (1UL << 40)) {
259 tte = (__pa(va) & _PAGE_PADDR) |
260 _PAGE_VALID | _PAGE_SZ4MB |
261 _PAGE_E | _PAGE_P | _PAGE_W;
269 tte = (__pa(va) & _PAGE_PADDR) |
270 _PAGE_VALID | _PAGE_SZ4MB |
271 _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W;
275 if (res == PROM_TRUE) {
277 args[args[1] + 3] = 0;
278 args[args[1] + 4] = res;
279 args[args[1] + 5] = tte;
282 args[args[1] + 3] = 0;
283 args[args[1] + 4] = res;
285 } else if (!strcmp(cmd, ".soft1")) {
289 prom_printf("%lx:\"%s%s%s%s%s\" ",
290 (tte & _PAGE_SOFT) >> 7,
291 tte & _PAGE_MODIFIED ? "M" : "-",
292 tte & _PAGE_ACCESSED ? "A" : "-",
293 tte & _PAGE_READ ? "W" : "-",
294 tte & _PAGE_WRITE ? "R" : "-",
295 tte & _PAGE_PRESENT ? "P" : "-");
298 args[args[1] + 3] = 0;
299 args[args[1] + 4] = PROM_TRUE;
300 } else if (!strcmp(cmd, ".soft2")) {
304 prom_printf("%lx ", (tte & 0x07FC000000000000UL) >> 50);
307 args[args[1] + 3] = 0;
308 args[args[1] + 4] = PROM_TRUE;
310 prom_printf("unknown PROM `%s' command...\n", cmd);
312 unregister_console(&prom_console);
313 while (saved_console) {
314 cons = saved_console;
315 saved_console = cons->next;
316 register_console(cons);
318 spin_lock(&prom_entry_lock);
319 local_irq_restore(flags);
322 * Restore in-interrupt status for a resume from obp.
328 unsigned int boot_flags = 0;
329 #define BOOTME_DEBUG 0x1
330 #define BOOTME_SINGLE 0x2
332 /* Exported for mm/init.c:paging_init. */
333 unsigned long cmdline_memory_size = 0;
335 static struct console prom_debug_console = {
337 .write = prom_console_write,
338 .flags = CON_PRINTBUFFER,
342 /* XXX Implement this at some point... */
343 void kernel_enter_debugger(void)
347 int obp_system_intr(void)
349 if (boot_flags & BOOTME_DEBUG) {
350 printk("OBP: system interrupted\n");
358 * Process kernel command line switches that are specific to the
359 * SPARC or that require special low-level processing.
361 static void __init process_switch(char c)
365 boot_flags |= BOOTME_DEBUG;
368 boot_flags |= BOOTME_SINGLE;
371 prom_printf("boot_flags_init: Halt!\n");
375 /* Use PROM debug console. */
376 register_console(&prom_debug_console);
379 printk("Unknown boot switch (-%c)\n", c);
384 static void __init process_console(char *commands)
388 /* Linux-style serial */
389 if (!strncmp(commands, "ttyS", 4))
390 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
391 else if (!strncmp(commands, "tty", 3)) {
392 char c = *(commands + 3);
393 /* Solaris-style serial */
394 if (c == 'a' || c == 'b') {
395 serial_console = c - 'a' + 1;
396 prom_printf ("Using /dev/tty%c as console.\n", c);
398 /* else Linux-style fbcon, not serial */
400 #if defined(CONFIG_PROM_CONSOLE)
401 if (!strncmp(commands, "prom", 4)) {
404 for (p = commands - 8; *p && *p != ' '; p++)
406 conswitchp = &prom_con;
411 static void __init boot_flags_init(char *commands)
414 /* Move to the start of the next "argument". */
415 while (*commands && *commands == ' ')
418 /* Process any command switches, otherwise skip it. */
419 if (*commands == '\0')
421 if (*commands == '-') {
423 while (*commands && *commands != ' ')
424 process_switch(*commands++);
427 if (!strncmp(commands, "console=", 8)) {
428 process_console(commands);
429 } else if (!strncmp(commands, "mem=", 4)) {
431 * "mem=XXX[kKmM]" overrides the PROM-reported
434 cmdline_memory_size = simple_strtoul(commands + 4,
436 if (*commands == 'K' || *commands == 'k') {
437 cmdline_memory_size <<= 10;
439 } else if (*commands=='M' || *commands=='m') {
440 cmdline_memory_size <<= 20;
444 while (*commands && *commands != ' ')
449 extern int prom_probe_memory(void);
450 extern unsigned long start, end;
451 extern void panic_setup(char *, int *);
453 extern unsigned short root_flags;
454 extern unsigned short root_dev;
455 extern unsigned short ram_flags;
456 #define RAMDISK_IMAGE_START_MASK 0x07FF
457 #define RAMDISK_PROMPT_FLAG 0x8000
458 #define RAMDISK_LOAD_FLAG 0x4000
460 extern int root_mountflags;
462 char reboot_command[COMMAND_LINE_SIZE];
464 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
466 void register_prom_callbacks(void)
468 prom_setcallback(prom_callback);
469 prom_feval(": linux-va>tte-data 2 \" va>tte-data\" $callback drop ; "
470 "' linux-va>tte-data to va>tte-data");
471 prom_feval(": linux-.soft1 1 \" .soft1\" $callback 2drop ; "
472 "' linux-.soft1 to .soft1");
473 prom_feval(": linux-.soft2 1 \" .soft2\" $callback 2drop ; "
474 "' linux-.soft2 to .soft2");
477 extern void paging_init(void);
479 void __init setup_arch(char **cmdline_p)
481 unsigned long highest_paddr;
484 /* Initialize PROM console and command line. */
485 *cmdline_p = prom_getbootargs();
486 strcpy(saved_command_line, *cmdline_p);
488 printk("ARCH: SUN4U\n");
490 #ifdef CONFIG_DUMMY_CONSOLE
491 conswitchp = &dummy_con;
492 #elif defined(CONFIG_PROM_CONSOLE)
493 conswitchp = &prom_con;
497 i = (unsigned long)&irq_stat[1] - (unsigned long)&irq_stat[0];
498 if ((i == SMP_CACHE_BYTES) || (i == (2 * SMP_CACHE_BYTES))) {
499 extern unsigned int irqsz_patchme[1];
500 irqsz_patchme[0] |= ((i == SMP_CACHE_BYTES) ? SMP_CACHE_BYTES_SHIFT : \
501 SMP_CACHE_BYTES_SHIFT + 1);
502 flushi((long)&irqsz_patchme[0]);
504 prom_printf("Unexpected size of irq_stat[] elements\n");
508 /* Work out if we are starfire early on */
511 boot_flags_init(*cmdline_p);
514 (void) prom_probe_memory();
516 /* In paging_init() we tip off this value to see if we need
517 * to change init_mm.pgd to point to the real alias mapping.
519 phys_base = 0xffffffffffffffffUL;
521 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
524 if (sp_banks[i].base_addr < phys_base)
525 phys_base = sp_banks[i].base_addr;
526 top = sp_banks[i].base_addr +
527 sp_banks[i].num_bytes;
528 if (highest_paddr < top)
531 pfn_base = phys_base >> PAGE_SHIFT;
536 kern_base = spitfire_get_itlb_data(sparc64_highest_locked_tlbent());
537 kern_base &= _PAGE_PADDR_SF;
542 kern_base = cheetah_get_litlb_data(sparc64_highest_locked_tlbent());
543 kern_base &= _PAGE_PADDR;
547 kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
550 root_mountflags &= ~MS_RDONLY;
551 ROOT_DEV = old_decode_dev(root_dev);
552 #ifdef CONFIG_BLK_DEV_INITRD
553 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
554 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
555 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
558 init_task.thread_info->kregs = &fake_swapper_regs;
561 if (!ic_set_manually) {
562 int chosen = prom_finddevice ("/chosen");
565 cl = prom_getintdefault (chosen, "client-ip", 0);
566 sv = prom_getintdefault (chosen, "server-ip", 0);
567 gw = prom_getintdefault (chosen, "gateway-ip", 0);
573 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
574 ic_proto_enabled = 0;
583 static int __init set_preferred_console(void)
587 /* The user has requested a console so this is already set up. */
588 if (serial_console >= 0)
591 idev = prom_query_input_device();
592 odev = prom_query_output_device();
593 if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
595 } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
597 } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
600 prom_printf("Inconsistent console: "
601 "input %d, output %d\n",
607 return add_preferred_console("ttyS", serial_console - 1, NULL);
611 console_initcall(set_preferred_console);
613 /* BUFFER is PAGE_SIZE bytes long. */
615 extern char *sparc_cpu_type;
616 extern char *sparc_fpu_type;
618 extern void smp_info(struct seq_file *);
619 extern void smp_bogo(struct seq_file *);
620 extern void mmu_info(struct seq_file *);
622 static int show_cpuinfo(struct seq_file *m, void *__unused)
627 "promlib\t\t: Version 3 Revision %d\n"
628 "prom\t\t: %d.%d.%d\n"
630 "ncpus probed\t: %ld\n"
631 "ncpus active\t: %ld\n"
633 "Cpu0Bogo\t: %lu.%02lu\n"
634 "Cpu0ClkTck\t: %016lx\n"
641 (prom_prev >> 8) & 0xff,
643 (long)num_possible_cpus(),
644 (long)num_online_cpus()
646 , cpu_data(0).udelay_val/(500000/HZ),
647 (cpu_data(0).udelay_val/(5000/HZ)) % 100,
648 cpu_data(0).clock_tick
661 static void *c_start(struct seq_file *m, loff_t *pos)
663 /* The pointer we are returning is arbitrary,
664 * it just has to be non-NULL and not IS_ERR
665 * in the success case.
667 return *pos == 0 ? &c_start : NULL;
670 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
673 return c_start(m, pos);
676 static void c_stop(struct seq_file *m, void *v)
680 struct seq_operations cpuinfo_op = {
684 .show = show_cpuinfo,
687 extern int stop_a_enabled;
689 void sun_do_break(void)
695 flush_user_windows();
700 int serial_console = -1;
701 int stop_a_enabled = 1;
703 static int __init topology_init(void)
708 for (i = 0; i < NR_CPUS; i++) {
709 if (cpu_possible(i)) {
710 struct cpu *p = kmalloc(sizeof(*p), GFP_KERNEL);
713 memset(p, 0, sizeof(*p));
714 register_cpu(p, i, NULL);
723 subsys_initcall(topology_init);