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>
53 #include <net/ipconfig.h>
56 struct screen_info screen_info = {
57 0, 0, /* orig-x, orig-y */
59 0, /* orig-video-page */
60 0, /* orig-video-mode */
61 128, /* orig-video-cols */
62 0, 0, 0, /* unused, ega_bx, unused */
63 54, /* orig-video-lines */
64 0, /* orig-video-isVGA */
65 16 /* orig-video-points */
68 /* Typing sync at the prom prompt calls the function pointed to by
69 * the sync callback which I set to the following function.
70 * This should sync all filesystems and return, for now it just
71 * prints out pretty messages and returns.
74 void (*prom_palette)(int);
75 void (*prom_keyboard)(void);
78 prom_console_write(struct console *con, const char *s, unsigned n)
83 static struct console prom_console = {
85 .write = prom_console_write,
86 .flags = CON_CONSDEV | CON_ENABLED,
94 int prom_callback(long *args)
96 struct console *cons, *saved_console = NULL;
99 extern spinlock_t prom_entry_lock;
103 if (!(cmd = (char *)args[0]))
107 * The callback can be invoked on the cpu that first dropped
108 * into prom_cmdline after taking the serial interrupt, or on
109 * a slave processor that was smp_captured() if the
110 * administrator has done a switch-cpu inside obp. In either
111 * case, the cpu is marked as in-interrupt. Drop IRQ locks.
115 /* XXX Revisit the locking here someday. This is a debugging
116 * XXX feature so it isnt all that critical. -DaveM
118 local_irq_save(flags);
120 spin_unlock(&prom_entry_lock);
121 cons = console_drivers;
123 unregister_console(cons);
124 cons->flags &= ~(CON_PRINTBUFFER);
125 cons->next = saved_console;
126 saved_console = cons;
127 cons = console_drivers;
129 register_console(&prom_console);
130 if (!strcmp(cmd, "sync")) {
131 prom_printf("PROM `%s' command...\n", cmd);
133 if (current->pid != 0) {
139 args[args[1] + 3] = -1;
140 prom_printf("Returning to PROM\n");
141 } else if (!strcmp(cmd, "va>tte-data")) {
142 unsigned long ctx, va;
143 unsigned long tte = 0;
144 long res = PROM_FALSE;
150 * Find process owning ctx, lookup mapping.
152 struct task_struct *p;
153 struct mm_struct *mm = NULL;
159 for_each_process(p) {
161 if (CTX_NRBITS(mm->context) == ctx)
165 CTX_NRBITS(mm->context) != ctx)
168 pgdp = pgd_offset(mm, va);
171 pudp = pud_offset(pgdp, va);
174 pmdp = pmd_offset(pudp, va);
178 /* Preemption implicitly disabled by virtue of
179 * being called from inside OBP.
181 ptep = pte_offset_map(pmdp, va);
182 if (pte_present(*ptep)) {
183 tte = pte_val(*ptep);
190 if ((va >= KERNBASE) && (va < (KERNBASE + (4 * 1024 * 1024)))) {
191 unsigned long kernel_pctx = 0;
193 if (tlb_type == cheetah_plus)
194 kernel_pctx |= (CTX_CHEETAH_PLUS_NUC |
195 CTX_CHEETAH_PLUS_CTX0);
197 /* Spitfire Errata #32 workaround */
198 __asm__ __volatile__("stxa %0, [%1] %2\n\t"
202 "r" (PRIMARY_CONTEXT),
206 * Locked down tlb entry.
209 if (tlb_type == spitfire)
210 tte = spitfire_get_dtlb_data(SPITFIRE_HIGHEST_LOCKED_TLBENT);
211 else if (tlb_type == cheetah || tlb_type == cheetah_plus)
212 tte = cheetah_get_ldtlb_data(CHEETAH_HIGHEST_LOCKED_TLBENT);
218 if (va < PGDIR_SIZE) {
220 * vmalloc or prom_inherited mapping.
228 if ((va >= LOW_OBP_ADDRESS) && (va < HI_OBP_ADDRESS)) {
229 tte = prom_virt_to_phys(va, &error);
234 pgdp = pgd_offset_k(va);
237 pudp = pud_offset(pgdp, va);
240 pmdp = pmd_offset(pudp, va);
244 /* Preemption implicitly disabled by virtue of
245 * being called from inside OBP.
247 ptep = pte_offset_kernel(pmdp, va);
248 if (pte_present(*ptep)) {
249 tte = pte_val(*ptep);
255 if (va < PAGE_OFFSET) {
262 if (va & (1UL << 40)) {
267 tte = (__pa(va) & _PAGE_PADDR) |
268 _PAGE_VALID | _PAGE_SZ4MB |
269 _PAGE_E | _PAGE_P | _PAGE_W;
277 tte = (__pa(va) & _PAGE_PADDR) |
278 _PAGE_VALID | _PAGE_SZ4MB |
279 _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W;
283 if (res == PROM_TRUE) {
285 args[args[1] + 3] = 0;
286 args[args[1] + 4] = res;
287 args[args[1] + 5] = tte;
290 args[args[1] + 3] = 0;
291 args[args[1] + 4] = res;
293 } else if (!strcmp(cmd, ".soft1")) {
297 prom_printf("%lx:\"%s%s%s%s%s\" ",
298 (tte & _PAGE_SOFT) >> 7,
299 tte & _PAGE_MODIFIED ? "M" : "-",
300 tte & _PAGE_ACCESSED ? "A" : "-",
301 tte & _PAGE_READ ? "W" : "-",
302 tte & _PAGE_WRITE ? "R" : "-",
303 tte & _PAGE_PRESENT ? "P" : "-");
306 args[args[1] + 3] = 0;
307 args[args[1] + 4] = PROM_TRUE;
308 } else if (!strcmp(cmd, ".soft2")) {
312 prom_printf("%lx ", (tte & 0x07FC000000000000UL) >> 50);
315 args[args[1] + 3] = 0;
316 args[args[1] + 4] = PROM_TRUE;
318 prom_printf("unknown PROM `%s' command...\n", cmd);
320 unregister_console(&prom_console);
321 while (saved_console) {
322 cons = saved_console;
323 saved_console = cons->next;
324 register_console(cons);
326 spin_lock(&prom_entry_lock);
327 local_irq_restore(flags);
330 * Restore in-interrupt status for a resume from obp.
336 unsigned int boot_flags = 0;
337 #define BOOTME_DEBUG 0x1
338 #define BOOTME_SINGLE 0x2
340 /* Exported for mm/init.c:paging_init. */
341 unsigned long cmdline_memory_size = 0;
343 static struct console prom_debug_console = {
345 .write = prom_console_write,
346 .flags = CON_PRINTBUFFER,
350 /* XXX Implement this at some point... */
351 void kernel_enter_debugger(void)
355 int obp_system_intr(void)
357 if (boot_flags & BOOTME_DEBUG) {
358 printk("OBP: system interrupted\n");
366 * Process kernel command line switches that are specific to the
367 * SPARC or that require special low-level processing.
369 static void __init process_switch(char c)
373 boot_flags |= BOOTME_DEBUG;
376 boot_flags |= BOOTME_SINGLE;
379 prom_printf("boot_flags_init: Halt!\n");
383 /* Use PROM debug console. */
384 register_console(&prom_debug_console);
387 printk("Unknown boot switch (-%c)\n", c);
392 static void __init process_console(char *commands)
396 /* Linux-style serial */
397 if (!strncmp(commands, "ttyS", 4))
398 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
399 else if (!strncmp(commands, "tty", 3)) {
400 char c = *(commands + 3);
401 /* Solaris-style serial */
402 if (c == 'a' || c == 'b') {
403 serial_console = c - 'a' + 1;
404 prom_printf ("Using /dev/tty%c as console.\n", c);
406 /* else Linux-style fbcon, not serial */
408 #if defined(CONFIG_PROM_CONSOLE)
409 if (!strncmp(commands, "prom", 4)) {
412 for (p = commands - 8; *p && *p != ' '; p++)
414 conswitchp = &prom_con;
419 static void __init boot_flags_init(char *commands)
422 /* Move to the start of the next "argument". */
423 while (*commands && *commands == ' ')
426 /* Process any command switches, otherwise skip it. */
427 if (*commands == '\0')
429 if (*commands == '-') {
431 while (*commands && *commands != ' ')
432 process_switch(*commands++);
435 if (!strncmp(commands, "console=", 8)) {
436 process_console(commands);
437 } else if (!strncmp(commands, "mem=", 4)) {
439 * "mem=XXX[kKmM]" overrides the PROM-reported
442 cmdline_memory_size = simple_strtoul(commands + 4,
444 if (*commands == 'K' || *commands == 'k') {
445 cmdline_memory_size <<= 10;
447 } else if (*commands=='M' || *commands=='m') {
448 cmdline_memory_size <<= 20;
452 while (*commands && *commands != ' ')
457 extern int prom_probe_memory(void);
458 extern unsigned long start, end;
459 extern void panic_setup(char *, int *);
461 extern unsigned short root_flags;
462 extern unsigned short root_dev;
463 extern unsigned short ram_flags;
464 #define RAMDISK_IMAGE_START_MASK 0x07FF
465 #define RAMDISK_PROMPT_FLAG 0x8000
466 #define RAMDISK_LOAD_FLAG 0x4000
468 extern int root_mountflags;
470 char reboot_command[COMMAND_LINE_SIZE];
472 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
474 void register_prom_callbacks(void)
476 prom_setcallback(prom_callback);
477 prom_feval(": linux-va>tte-data 2 \" va>tte-data\" $callback drop ; "
478 "' linux-va>tte-data to va>tte-data");
479 prom_feval(": linux-.soft1 1 \" .soft1\" $callback 2drop ; "
480 "' linux-.soft1 to .soft1");
481 prom_feval(": linux-.soft2 1 \" .soft2\" $callback 2drop ; "
482 "' linux-.soft2 to .soft2");
485 extern void paging_init(void);
487 void __init setup_arch(char **cmdline_p)
489 unsigned long highest_paddr;
492 /* Initialize PROM console and command line. */
493 *cmdline_p = prom_getbootargs();
494 strcpy(saved_command_line, *cmdline_p);
496 printk("ARCH: SUN4U\n");
498 #ifdef CONFIG_DUMMY_CONSOLE
499 conswitchp = &dummy_con;
500 #elif defined(CONFIG_PROM_CONSOLE)
501 conswitchp = &prom_con;
505 i = (unsigned long)&irq_stat[1] - (unsigned long)&irq_stat[0];
506 if ((i == SMP_CACHE_BYTES) || (i == (2 * SMP_CACHE_BYTES))) {
507 extern unsigned int irqsz_patchme[1];
508 irqsz_patchme[0] |= ((i == SMP_CACHE_BYTES) ? SMP_CACHE_BYTES_SHIFT : \
509 SMP_CACHE_BYTES_SHIFT + 1);
510 flushi((long)&irqsz_patchme[0]);
512 prom_printf("Unexpected size of irq_stat[] elements\n");
516 /* Work out if we are starfire early on */
519 boot_flags_init(*cmdline_p);
522 (void) prom_probe_memory();
524 /* In paging_init() we tip off this value to see if we need
525 * to change init_mm.pgd to point to the real alias mapping.
527 phys_base = 0xffffffffffffffffUL;
529 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
532 if (sp_banks[i].base_addr < phys_base)
533 phys_base = sp_banks[i].base_addr;
534 top = sp_banks[i].base_addr +
535 sp_banks[i].num_bytes;
536 if (highest_paddr < top)
539 pfn_base = phys_base >> PAGE_SHIFT;
544 kern_base = spitfire_get_itlb_data(sparc64_highest_locked_tlbent());
545 kern_base &= _PAGE_PADDR_SF;
550 kern_base = cheetah_get_litlb_data(sparc64_highest_locked_tlbent());
551 kern_base &= _PAGE_PADDR;
555 kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
558 root_mountflags &= ~MS_RDONLY;
559 ROOT_DEV = old_decode_dev(root_dev);
560 #ifdef CONFIG_BLK_DEV_INITRD
561 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
562 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
563 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
566 init_task.thread_info->kregs = &fake_swapper_regs;
569 if (!ic_set_manually) {
570 int chosen = prom_finddevice ("/chosen");
573 cl = prom_getintdefault (chosen, "client-ip", 0);
574 sv = prom_getintdefault (chosen, "server-ip", 0);
575 gw = prom_getintdefault (chosen, "gateway-ip", 0);
581 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
582 ic_proto_enabled = 0;
591 static int __init set_preferred_console(void)
595 /* The user has requested a console so this is already set up. */
596 if (serial_console >= 0)
599 idev = prom_query_input_device();
600 odev = prom_query_output_device();
601 if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
603 } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
605 } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
608 prom_printf("Inconsistent console: "
609 "input %d, output %d\n",
615 return add_preferred_console("ttyS", serial_console - 1, NULL);
619 console_initcall(set_preferred_console);
621 /* BUFFER is PAGE_SIZE bytes long. */
623 extern char *sparc_cpu_type;
624 extern char *sparc_fpu_type;
626 extern void smp_info(struct seq_file *);
627 extern void smp_bogo(struct seq_file *);
628 extern void mmu_info(struct seq_file *);
630 static int show_cpuinfo(struct seq_file *m, void *__unused)
635 "promlib\t\t: Version 3 Revision %d\n"
636 "prom\t\t: %d.%d.%d\n"
638 "ncpus probed\t: %ld\n"
639 "ncpus active\t: %ld\n"
641 "Cpu0Bogo\t: %lu.%02lu\n"
642 "Cpu0ClkTck\t: %016lx\n"
649 (prom_prev >> 8) & 0xff,
651 (long)num_possible_cpus(),
652 (long)num_online_cpus()
654 , cpu_data(0).udelay_val/(500000/HZ),
655 (cpu_data(0).udelay_val/(5000/HZ)) % 100,
656 cpu_data(0).clock_tick
669 static void *c_start(struct seq_file *m, loff_t *pos)
671 /* The pointer we are returning is arbitrary,
672 * it just has to be non-NULL and not IS_ERR
673 * in the success case.
675 return *pos == 0 ? &c_start : NULL;
678 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
681 return c_start(m, pos);
684 static void c_stop(struct seq_file *m, void *v)
688 struct seq_operations cpuinfo_op = {
692 .show = show_cpuinfo,
695 extern int stop_a_enabled;
697 void sun_do_break(void)
703 flush_user_windows();
708 int serial_console = -1;
709 int stop_a_enabled = 1;
711 static int __init topology_init(void)
716 for (i = 0; i < NR_CPUS; i++) {
717 if (cpu_possible(i)) {
718 struct cpu *p = kmalloc(sizeof(*p), GFP_KERNEL);
721 memset(p, 0, sizeof(*p));
722 register_cpu(p, i, NULL);
731 subsys_initcall(topology_init);