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-rw-r--r--arch/sparc64/kernel/setup.c731
1 files changed, 731 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c
new file mode 100644
index 0000000..12c3d84b
--- /dev/null
+++ b/arch/sparc64/kernel/setup.c
@@ -0,0 +1,731 @@
+/* $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $
+ * linux/arch/sparc64/kernel/setup.c
+ *
+ * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <asm/smp.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/delay.h>
+#include <linux/config.h>
+#include <linux/fs.h>
+#include <linux/seq_file.h>
+#include <linux/syscalls.h>
+#include <linux/kdev_t.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/inet.h>
+#include <linux/console.h>
+#include <linux/root_dev.h>
+#include <linux/interrupt.h>
+#include <linux/cpu.h>
+#include <linux/initrd.h>
+
+#include <asm/segment.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/oplib.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/idprom.h>
+#include <asm/head.h>
+#include <asm/starfire.h>
+#include <asm/mmu_context.h>
+#include <asm/timer.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+#include <asm/mmu.h>
+
+#ifdef CONFIG_IP_PNP
+#include <net/ipconfig.h>
+#endif
+
+struct screen_info screen_info = {
+ 0, 0, /* orig-x, orig-y */
+ 0, /* unused */
+ 0, /* orig-video-page */
+ 0, /* orig-video-mode */
+ 128, /* orig-video-cols */
+ 0, 0, 0, /* unused, ega_bx, unused */
+ 54, /* orig-video-lines */
+ 0, /* orig-video-isVGA */
+ 16 /* orig-video-points */
+};
+
+/* Typing sync at the prom prompt calls the function pointed to by
+ * the sync callback which I set to the following function.
+ * This should sync all filesystems and return, for now it just
+ * prints out pretty messages and returns.
+ */
+
+void (*prom_palette)(int);
+void (*prom_keyboard)(void);
+
+static void
+prom_console_write(struct console *con, const char *s, unsigned n)
+{
+ prom_write(s, n);
+}
+
+static struct console prom_console = {
+ .name = "prom",
+ .write = prom_console_write,
+ .flags = CON_CONSDEV | CON_ENABLED,
+ .index = -1,
+};
+
+#define PROM_TRUE -1
+#define PROM_FALSE 0
+
+/* Pretty sick eh? */
+int prom_callback(long *args)
+{
+ struct console *cons, *saved_console = NULL;
+ unsigned long flags;
+ char *cmd;
+ extern spinlock_t prom_entry_lock;
+
+ if (!args)
+ return -1;
+ if (!(cmd = (char *)args[0]))
+ return -1;
+
+ /*
+ * The callback can be invoked on the cpu that first dropped
+ * into prom_cmdline after taking the serial interrupt, or on
+ * a slave processor that was smp_captured() if the
+ * administrator has done a switch-cpu inside obp. In either
+ * case, the cpu is marked as in-interrupt. Drop IRQ locks.
+ */
+ irq_exit();
+
+ /* XXX Revisit the locking here someday. This is a debugging
+ * XXX feature so it isnt all that critical. -DaveM
+ */
+ local_irq_save(flags);
+
+ spin_unlock(&prom_entry_lock);
+ cons = console_drivers;
+ while (cons) {
+ unregister_console(cons);
+ cons->flags &= ~(CON_PRINTBUFFER);
+ cons->next = saved_console;
+ saved_console = cons;
+ cons = console_drivers;
+ }
+ register_console(&prom_console);
+ if (!strcmp(cmd, "sync")) {
+ prom_printf("PROM `%s' command...\n", cmd);
+ show_free_areas();
+ if (current->pid != 0) {
+ local_irq_enable();
+ sys_sync();
+ local_irq_disable();
+ }
+ args[2] = 0;
+ args[args[1] + 3] = -1;
+ prom_printf("Returning to PROM\n");
+ } else if (!strcmp(cmd, "va>tte-data")) {
+ unsigned long ctx, va;
+ unsigned long tte = 0;
+ long res = PROM_FALSE;
+
+ ctx = args[3];
+ va = args[4];
+ if (ctx) {
+ /*
+ * Find process owning ctx, lookup mapping.
+ */
+ struct task_struct *p;
+ struct mm_struct *mm = NULL;
+ pgd_t *pgdp;
+ pud_t *pudp;
+ pmd_t *pmdp;
+ pte_t *ptep;
+
+ for_each_process(p) {
+ mm = p->mm;
+ if (CTX_NRBITS(mm->context) == ctx)
+ break;
+ }
+ if (!mm ||
+ CTX_NRBITS(mm->context) != ctx)
+ goto done;
+
+ pgdp = pgd_offset(mm, va);
+ if (pgd_none(*pgdp))
+ goto done;
+ pudp = pud_offset(pgdp, va);
+ if (pud_none(*pudp))
+ goto done;
+ pmdp = pmd_offset(pudp, va);
+ if (pmd_none(*pmdp))
+ goto done;
+
+ /* Preemption implicitly disabled by virtue of
+ * being called from inside OBP.
+ */
+ ptep = pte_offset_map(pmdp, va);
+ if (pte_present(*ptep)) {
+ tte = pte_val(*ptep);
+ res = PROM_TRUE;
+ }
+ pte_unmap(ptep);
+ goto done;
+ }
+
+ if ((va >= KERNBASE) && (va < (KERNBASE + (4 * 1024 * 1024)))) {
+ unsigned long kernel_pctx = 0;
+
+ if (tlb_type == cheetah_plus)
+ kernel_pctx |= (CTX_CHEETAH_PLUS_NUC |
+ CTX_CHEETAH_PLUS_CTX0);
+
+ /* Spitfire Errata #32 workaround */
+ __asm__ __volatile__("stxa %0, [%1] %2\n\t"
+ "flush %%g6"
+ : /* No outputs */
+ : "r" (kernel_pctx),
+ "r" (PRIMARY_CONTEXT),
+ "i" (ASI_DMMU));
+
+ /*
+ * Locked down tlb entry.
+ */
+
+ if (tlb_type == spitfire)
+ tte = spitfire_get_dtlb_data(SPITFIRE_HIGHEST_LOCKED_TLBENT);
+ else if (tlb_type == cheetah || tlb_type == cheetah_plus)
+ tte = cheetah_get_ldtlb_data(CHEETAH_HIGHEST_LOCKED_TLBENT);
+
+ res = PROM_TRUE;
+ goto done;
+ }
+
+ if (va < PGDIR_SIZE) {
+ /*
+ * vmalloc or prom_inherited mapping.
+ */
+ pgd_t *pgdp;
+ pud_t *pudp;
+ pmd_t *pmdp;
+ pte_t *ptep;
+ int error;
+
+ if ((va >= LOW_OBP_ADDRESS) && (va < HI_OBP_ADDRESS)) {
+ tte = prom_virt_to_phys(va, &error);
+ if (!error)
+ res = PROM_TRUE;
+ goto done;
+ }
+ pgdp = pgd_offset_k(va);
+ if (pgd_none(*pgdp))
+ goto done;
+ pudp = pud_offset(pgdp, va);
+ if (pud_none(*pudp))
+ goto done;
+ pmdp = pmd_offset(pudp, va);
+ if (pmd_none(*pmdp))
+ goto done;
+
+ /* Preemption implicitly disabled by virtue of
+ * being called from inside OBP.
+ */
+ ptep = pte_offset_kernel(pmdp, va);
+ if (pte_present(*ptep)) {
+ tte = pte_val(*ptep);
+ res = PROM_TRUE;
+ }
+ goto done;
+ }
+
+ if (va < PAGE_OFFSET) {
+ /*
+ * No mappings here.
+ */
+ goto done;
+ }
+
+ if (va & (1UL << 40)) {
+ /*
+ * I/O page.
+ */
+
+ tte = (__pa(va) & _PAGE_PADDR) |
+ _PAGE_VALID | _PAGE_SZ4MB |
+ _PAGE_E | _PAGE_P | _PAGE_W;
+ res = PROM_TRUE;
+ goto done;
+ }
+
+ /*
+ * Normal page.
+ */
+ tte = (__pa(va) & _PAGE_PADDR) |
+ _PAGE_VALID | _PAGE_SZ4MB |
+ _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W;
+ res = PROM_TRUE;
+
+ done:
+ if (res == PROM_TRUE) {
+ args[2] = 3;
+ args[args[1] + 3] = 0;
+ args[args[1] + 4] = res;
+ args[args[1] + 5] = tte;
+ } else {
+ args[2] = 2;
+ args[args[1] + 3] = 0;
+ args[args[1] + 4] = res;
+ }
+ } else if (!strcmp(cmd, ".soft1")) {
+ unsigned long tte;
+
+ tte = args[3];
+ prom_printf("%lx:\"%s%s%s%s%s\" ",
+ (tte & _PAGE_SOFT) >> 7,
+ tte & _PAGE_MODIFIED ? "M" : "-",
+ tte & _PAGE_ACCESSED ? "A" : "-",
+ tte & _PAGE_READ ? "W" : "-",
+ tte & _PAGE_WRITE ? "R" : "-",
+ tte & _PAGE_PRESENT ? "P" : "-");
+
+ args[2] = 2;
+ args[args[1] + 3] = 0;
+ args[args[1] + 4] = PROM_TRUE;
+ } else if (!strcmp(cmd, ".soft2")) {
+ unsigned long tte;
+
+ tte = args[3];
+ prom_printf("%lx ", (tte & 0x07FC000000000000UL) >> 50);
+
+ args[2] = 2;
+ args[args[1] + 3] = 0;
+ args[args[1] + 4] = PROM_TRUE;
+ } else {
+ prom_printf("unknown PROM `%s' command...\n", cmd);
+ }
+ unregister_console(&prom_console);
+ while (saved_console) {
+ cons = saved_console;
+ saved_console = cons->next;
+ register_console(cons);
+ }
+ spin_lock(&prom_entry_lock);
+ local_irq_restore(flags);
+
+ /*
+ * Restore in-interrupt status for a resume from obp.
+ */
+ irq_enter();
+ return 0;
+}
+
+unsigned int boot_flags = 0;
+#define BOOTME_DEBUG 0x1
+#define BOOTME_SINGLE 0x2
+
+/* Exported for mm/init.c:paging_init. */
+unsigned long cmdline_memory_size = 0;
+
+static struct console prom_debug_console = {
+ .name = "debug",
+ .write = prom_console_write,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+};
+
+/* XXX Implement this at some point... */
+void kernel_enter_debugger(void)
+{
+}
+
+int obp_system_intr(void)
+{
+ if (boot_flags & BOOTME_DEBUG) {
+ printk("OBP: system interrupted\n");
+ prom_halt();
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Process kernel command line switches that are specific to the
+ * SPARC or that require special low-level processing.
+ */
+static void __init process_switch(char c)
+{
+ switch (c) {
+ case 'd':
+ boot_flags |= BOOTME_DEBUG;
+ break;
+ case 's':
+ boot_flags |= BOOTME_SINGLE;
+ break;
+ case 'h':
+ prom_printf("boot_flags_init: Halt!\n");
+ prom_halt();
+ break;
+ case 'p':
+ /* Use PROM debug console. */
+ register_console(&prom_debug_console);
+ break;
+ default:
+ printk("Unknown boot switch (-%c)\n", c);
+ break;
+ }
+}
+
+static void __init process_console(char *commands)
+{
+ serial_console = 0;
+ commands += 8;
+ /* Linux-style serial */
+ if (!strncmp(commands, "ttyS", 4))
+ serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
+ else if (!strncmp(commands, "tty", 3)) {
+ char c = *(commands + 3);
+ /* Solaris-style serial */
+ if (c == 'a' || c == 'b') {
+ serial_console = c - 'a' + 1;
+ prom_printf ("Using /dev/tty%c as console.\n", c);
+ }
+ /* else Linux-style fbcon, not serial */
+ }
+#if defined(CONFIG_PROM_CONSOLE)
+ if (!strncmp(commands, "prom", 4)) {
+ char *p;
+
+ for (p = commands - 8; *p && *p != ' '; p++)
+ *p = ' ';
+ conswitchp = &prom_con;
+ }
+#endif
+}
+
+static void __init boot_flags_init(char *commands)
+{
+ while (*commands) {
+ /* Move to the start of the next "argument". */
+ while (*commands && *commands == ' ')
+ commands++;
+
+ /* Process any command switches, otherwise skip it. */
+ if (*commands == '\0')
+ break;
+ if (*commands == '-') {
+ commands++;
+ while (*commands && *commands != ' ')
+ process_switch(*commands++);
+ continue;
+ }
+ if (!strncmp(commands, "console=", 8)) {
+ process_console(commands);
+ } else if (!strncmp(commands, "mem=", 4)) {
+ /*
+ * "mem=XXX[kKmM]" overrides the PROM-reported
+ * memory size.
+ */
+ cmdline_memory_size = simple_strtoul(commands + 4,
+ &commands, 0);
+ if (*commands == 'K' || *commands == 'k') {
+ cmdline_memory_size <<= 10;
+ commands++;
+ } else if (*commands=='M' || *commands=='m') {
+ cmdline_memory_size <<= 20;
+ commands++;
+ }
+ }
+ while (*commands && *commands != ' ')
+ commands++;
+ }
+}
+
+extern int prom_probe_memory(void);
+extern unsigned long start, end;
+extern void panic_setup(char *, int *);
+
+extern unsigned short root_flags;
+extern unsigned short root_dev;
+extern unsigned short ram_flags;
+#define RAMDISK_IMAGE_START_MASK 0x07FF
+#define RAMDISK_PROMPT_FLAG 0x8000
+#define RAMDISK_LOAD_FLAG 0x4000
+
+extern int root_mountflags;
+
+char reboot_command[COMMAND_LINE_SIZE];
+
+static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
+
+void register_prom_callbacks(void)
+{
+ prom_setcallback(prom_callback);
+ prom_feval(": linux-va>tte-data 2 \" va>tte-data\" $callback drop ; "
+ "' linux-va>tte-data to va>tte-data");
+ prom_feval(": linux-.soft1 1 \" .soft1\" $callback 2drop ; "
+ "' linux-.soft1 to .soft1");
+ prom_feval(": linux-.soft2 1 \" .soft2\" $callback 2drop ; "
+ "' linux-.soft2 to .soft2");
+}
+
+extern void paging_init(void);
+
+void __init setup_arch(char **cmdline_p)
+{
+ unsigned long highest_paddr;
+ int i;
+
+ /* Initialize PROM console and command line. */
+ *cmdline_p = prom_getbootargs();
+ strcpy(saved_command_line, *cmdline_p);
+
+ printk("ARCH: SUN4U\n");
+
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#elif defined(CONFIG_PROM_CONSOLE)
+ conswitchp = &prom_con;
+#endif
+
+#ifdef CONFIG_SMP
+ i = (unsigned long)&irq_stat[1] - (unsigned long)&irq_stat[0];
+ if ((i == SMP_CACHE_BYTES) || (i == (2 * SMP_CACHE_BYTES))) {
+ extern unsigned int irqsz_patchme[1];
+ irqsz_patchme[0] |= ((i == SMP_CACHE_BYTES) ? SMP_CACHE_BYTES_SHIFT : \
+ SMP_CACHE_BYTES_SHIFT + 1);
+ flushi((long)&irqsz_patchme[0]);
+ } else {
+ prom_printf("Unexpected size of irq_stat[] elements\n");
+ prom_halt();
+ }
+#endif
+ /* Work out if we are starfire early on */
+ check_if_starfire();
+
+ boot_flags_init(*cmdline_p);
+
+ idprom_init();
+ (void) prom_probe_memory();
+
+ /* In paging_init() we tip off this value to see if we need
+ * to change init_mm.pgd to point to the real alias mapping.
+ */
+ phys_base = 0xffffffffffffffffUL;
+ highest_paddr = 0UL;
+ for (i = 0; sp_banks[i].num_bytes != 0; i++) {
+ unsigned long top;
+
+ if (sp_banks[i].base_addr < phys_base)
+ phys_base = sp_banks[i].base_addr;
+ top = sp_banks[i].base_addr +
+ sp_banks[i].num_bytes;
+ if (highest_paddr < top)
+ highest_paddr = top;
+ }
+ pfn_base = phys_base >> PAGE_SHIFT;
+
+ switch (tlb_type) {
+ default:
+ case spitfire:
+ kern_base = spitfire_get_itlb_data(sparc64_highest_locked_tlbent());
+ kern_base &= _PAGE_PADDR_SF;
+ break;
+
+ case cheetah:
+ case cheetah_plus:
+ kern_base = cheetah_get_litlb_data(sparc64_highest_locked_tlbent());
+ kern_base &= _PAGE_PADDR;
+ break;
+ };
+
+ kern_size = (unsigned long)&_end - (unsigned long)KERNBASE;
+
+ if (!root_flags)
+ root_mountflags &= ~MS_RDONLY;
+ ROOT_DEV = old_decode_dev(root_dev);
+#ifdef CONFIG_BLK_DEV_INITRD
+ rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
+ rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
+ rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
+#endif
+
+ init_task.thread_info->kregs = &fake_swapper_regs;
+
+#ifdef CONFIG_IP_PNP
+ if (!ic_set_manually) {
+ int chosen = prom_finddevice ("/chosen");
+ u32 cl, sv, gw;
+
+ cl = prom_getintdefault (chosen, "client-ip", 0);
+ sv = prom_getintdefault (chosen, "server-ip", 0);
+ gw = prom_getintdefault (chosen, "gateway-ip", 0);
+ if (cl && sv) {
+ ic_myaddr = cl;
+ ic_servaddr = sv;
+ if (gw)
+ ic_gateway = gw;
+#if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
+ ic_proto_enabled = 0;
+#endif
+ }
+ }
+#endif
+
+ paging_init();
+}
+
+static int __init set_preferred_console(void)
+{
+ int idev, odev;
+
+ /* The user has requested a console so this is already set up. */
+ if (serial_console >= 0)
+ return -EBUSY;
+
+ idev = prom_query_input_device();
+ odev = prom_query_output_device();
+ if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
+ serial_console = 0;
+ } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
+ serial_console = 1;
+ } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
+ serial_console = 2;
+ } else {
+ prom_printf("Inconsistent console: "
+ "input %d, output %d\n",
+ idev, odev);
+ prom_halt();
+ }
+
+ if (serial_console)
+ return add_preferred_console("ttyS", serial_console - 1, NULL);
+
+ return -ENODEV;
+}
+console_initcall(set_preferred_console);
+
+/* BUFFER is PAGE_SIZE bytes long. */
+
+extern char *sparc_cpu_type;
+extern char *sparc_fpu_type;
+
+extern void smp_info(struct seq_file *);
+extern void smp_bogo(struct seq_file *);
+extern void mmu_info(struct seq_file *);
+
+static int show_cpuinfo(struct seq_file *m, void *__unused)
+{
+ seq_printf(m,
+ "cpu\t\t: %s\n"
+ "fpu\t\t: %s\n"
+ "promlib\t\t: Version 3 Revision %d\n"
+ "prom\t\t: %d.%d.%d\n"
+ "type\t\t: sun4u\n"
+ "ncpus probed\t: %ld\n"
+ "ncpus active\t: %ld\n"
+#ifndef CONFIG_SMP
+ "Cpu0Bogo\t: %lu.%02lu\n"
+ "Cpu0ClkTck\t: %016lx\n"
+#endif
+ ,
+ sparc_cpu_type,
+ sparc_fpu_type,
+ prom_rev,
+ prom_prev >> 16,
+ (prom_prev >> 8) & 0xff,
+ prom_prev & 0xff,
+ (long)num_possible_cpus(),
+ (long)num_online_cpus()
+#ifndef CONFIG_SMP
+ , cpu_data(0).udelay_val/(500000/HZ),
+ (cpu_data(0).udelay_val/(5000/HZ)) % 100,
+ cpu_data(0).clock_tick
+#endif
+ );
+#ifdef CONFIG_SMP
+ smp_bogo(m);
+#endif
+ mmu_info(m);
+#ifdef CONFIG_SMP
+ smp_info(m);
+#endif
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ /* The pointer we are returning is arbitrary,
+ * it just has to be non-NULL and not IS_ERR
+ * in the success case.
+ */
+ return *pos == 0 ? &c_start : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ ++*pos;
+ return c_start(m, pos);
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+struct seq_operations cpuinfo_op = {
+ .start =c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = show_cpuinfo,
+};
+
+extern int stop_a_enabled;
+
+void sun_do_break(void)
+{
+ if (!stop_a_enabled)
+ return;
+
+ prom_printf("\n");
+ flush_user_windows();
+
+ prom_cmdline();
+}
+
+int serial_console = -1;
+int stop_a_enabled = 1;
+
+static int __init topology_init(void)
+{
+ int i, err;
+
+ err = -ENOMEM;
+ for (i = 0; i < NR_CPUS; i++) {
+ if (cpu_possible(i)) {
+ struct cpu *p = kmalloc(sizeof(*p), GFP_KERNEL);
+
+ if (p) {
+ memset(p, 0, sizeof(*p));
+ register_cpu(p, i, NULL);
+ err = 0;
+ }
+ }
+ }
+
+ return err;
+}
+
+subsys_initcall(topology_init);
generated by cgit v1.1 at 2024-12-27 01:52:42 +0000