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, 476 insertions, 0 deletions

diff --git a/arch/sparc/kernel/setup.c b/arch/sparc/kernel/setup.c
new file mode 100644
index 0000000..55352ed
--- /dev/null
+++ b/arch/sparc/kernel/setup.c
@@ -0,0 +1,476 @@
+/*  $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $
+ *  linux/arch/sparc/kernel/setup.c
+ *
+ *  Copyright (C) 1995  David S. Miller (davem@caip.rutgers.edu)
+ *  Copyright (C) 2000  Anton Blanchard (anton@samba.org)
+ */
+
+#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 <linux/initrd.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/interrupt.h>
+#include <linux/console.h>
+#include <linux/spinlock.h>
+#include <linux/root_dev.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/traps.h>
+#include <asm/vaddrs.h>
+#include <asm/kdebug.h>
+#include <asm/mbus.h>
+#include <asm/idprom.h>
+#include <asm/machines.h>
+#include <asm/cpudata.h>
+#include <asm/setup.h>
+
+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,			/* ega_ax, ega_bx, ega_cx */
+	54,			/* orig-video-lines */
+	0,                      /* orig-video-isVGA */
+	16                      /* orig-video-points */
+};
+
+/* Typing sync at the prom prompt calls the function pointed to by
+ * romvec->pv_synchook which I set to the following function.
+ * This should sync all filesystems and return, for now it just
+ * prints out pretty messages and returns.
+ */
+
+extern unsigned long trapbase;
+void (*prom_palette)(int);
+
+/* Pretty sick eh? */
+void prom_sync_me(void)
+{
+	unsigned long prom_tbr, flags;
+
+	/* XXX Badly broken. FIX! - Anton */
+	local_irq_save(flags);
+	__asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr));
+	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
+			     "nop\n\t"
+			     "nop\n\t"
+			     "nop\n\t" : : "r" (&trapbase));
+
+	if (prom_palette)
+		prom_palette(1);
+	prom_printf("PROM SYNC COMMAND...\n");
+	show_free_areas();
+	if(current->pid != 0) {
+		local_irq_enable();
+		sys_sync();
+		local_irq_disable();
+	}
+	prom_printf("Returning to prom\n");
+
+	__asm__ __volatile__("wr %0, 0x0, %%tbr\n\t"
+			     "nop\n\t"
+			     "nop\n\t"
+			     "nop\n\t" : : "r" (prom_tbr));
+	local_irq_restore(flags);
+
+	return;
+}
+
+unsigned int boot_flags __initdata = 0;
+#define BOOTME_DEBUG  0x1
+#define BOOTME_SINGLE 0x2
+
+/* Exported for mm/init.c:paging_init. */
+unsigned long cmdline_memory_size __initdata = 0;
+
+static void
+prom_console_write(struct console *con, const char *s, unsigned n)
+{
+	prom_write(s, n);
+}
+
+static struct console prom_debug_console = {
+	.name =		"debug",
+	.write =	prom_console_write,
+	.flags =	CON_PRINTBUFFER,
+	.index =	-1,
+};
+
+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;
+		/* 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++;
+	}
+}
+
+/* This routine will in the future do all the nasty prom stuff
+ * to probe for the mmu type and its parameters, etc. This will
+ * also be where SMP things happen plus the Sparc specific memory
+ * physical memory probe as on the alpha.
+ */
+
+extern int prom_probe_memory(void);
+extern void sun4c_probe_vac(void);
+extern char cputypval;
+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];
+enum sparc_cpu sparc_cpu_model;
+
+struct tt_entry *sparc_ttable;
+
+struct pt_regs fake_swapper_regs;
+
+extern void paging_init(void);
+
+void __init setup_arch(char **cmdline_p)
+{
+	int i;
+	unsigned long highest_paddr;
+
+	sparc_ttable = (struct tt_entry *) &start;
+
+	/* Initialize PROM console and command line. */
+	*cmdline_p = prom_getbootargs();
+	strcpy(saved_command_line, *cmdline_p);
+
+	/* Set sparc_cpu_model */
+	sparc_cpu_model = sun_unknown;
+	if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; }
+	if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; }
+	if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; }
+	if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; }  /* CP-1200 with PROM 2.30 -E */
+	if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; }
+	if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
+	if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }
+
+#ifdef CONFIG_SUN4
+	if (sparc_cpu_model != sun4) {
+		prom_printf("This kernel is for Sun4 architecture only.\n");
+		prom_halt();
+	}
+#endif
+	printk("ARCH: ");
+	switch(sparc_cpu_model) {
+	case sun4:
+		printk("SUN4\n");
+		break;
+	case sun4c:
+		printk("SUN4C\n");
+		break;
+	case sun4m:
+		printk("SUN4M\n");
+		break;
+	case sun4d:
+		printk("SUN4D\n");
+		break;
+	case sun4e:
+		printk("SUN4E\n");
+		break;
+	case sun4u:
+		printk("SUN4U\n");
+		break;
+	default:
+		printk("UNKNOWN!\n");
+		break;
+	};
+
+#ifdef CONFIG_DUMMY_CONSOLE
+	conswitchp = &dummy_con;
+#elif defined(CONFIG_PROM_CONSOLE)
+	conswitchp = &prom_con;
+#endif
+	boot_flags_init(*cmdline_p);
+
+	idprom_init();
+	if (ARCH_SUN4C_SUN4)
+		sun4c_probe_vac();
+	load_mmu();
+	(void) prom_probe_memory();
+
+	phys_base = 0xffffffffUL;
+	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;
+
+	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
+
+	prom_setsync(prom_sync_me);
+
+	if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && 
+	   ((*(short *)linux_dbvec) != -1)) {
+		printk("Booted under KADB. Syncing trap table.\n");
+		(*(linux_dbvec->teach_debugger))();
+	}
+
+	init_mm.context = (unsigned long) NO_CONTEXT;
+	init_task.thread.kregs = &fake_swapper_regs;
+
+	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 if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) {
+		prom_printf("MrCoffee ttya\n");
+		serial_console = 1;
+	} else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) {
+		serial_console = 0;
+		prom_printf("MrCoffee keyboard\n");
+	} else {
+		prom_printf("Confusing console (idev %d, odev %d)\n",
+		    idev, odev);
+		serial_console = 1;
+	}
+
+	if (serial_console)
+		return add_preferred_console("ttyS", serial_console - 1, NULL);
+
+	return -ENODEV;
+}
+console_initcall(set_preferred_console);
+
+extern char *sparc_cpu_type;
+extern char *sparc_fpu_type;
+
+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 %d Revision %d\n"
+		   "prom\t\t: %d.%d\n"
+		   "type\t\t: %s\n"
+		   "ncpus probed\t: %d\n"
+		   "ncpus active\t: %d\n"
+#ifndef CONFIG_SMP
+		   "CPU0Bogo\t: %lu.%02lu\n"
+		   "CPU0ClkTck\t: %ld\n"
+#endif
+		   ,
+		   sparc_cpu_type ? sparc_cpu_type : "undetermined",
+		   sparc_fpu_type ? sparc_fpu_type : "undetermined",
+		   romvec->pv_romvers,
+		   prom_rev,
+		   romvec->pv_printrev >> 16,
+		   romvec->pv_printrev & 0xffff,
+		   &cputypval,
+		   num_possible_cpus(),
+		   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;
+
+	printk("\n");
+	flush_user_windows();
+
+	prom_cmdline();
+}
+
+int serial_console = -1;
+int stop_a_enabled = 1;