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 00000000000..12c3d84b746
--- /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);