Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

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 000000000000..12c3d84b7460
--- /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);