patch-2.1.30 linux/arch/sparc64/kernel/setup.c

• Lines: 417
• Date: Thu Mar 20 16:43:32 1997
• Orig file: v2.1.29/linux/arch/sparc64/kernel/setup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.29/linux/arch/sparc64/kernel/setup.c linux/arch/sparc64/kernel/setup.c
@@ -0,0 +1,416 @@
+/*  $Id: setup.c,v 1.1 1997/03/11 17:37:04 jj 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/malloc.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/kdev_t.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/blk.h>
+#include <linux/init.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>
+
+struct screen_info screen_info = {
+	0, 0,			/* orig-x, orig-y */
+	{ 0, 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 */
+};
+
+unsigned int phys_bytes_of_ram, end_of_phys_memory;
+
+unsigned long bios32_init(unsigned long memory_start, unsigned long memory_end)
+{
+	return memory_start;
+}
+
+/* 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.
+ */
+
+extern unsigned long sparc64_ttable_tl0;
+extern void breakpoint(void);
+#if CONFIG_SUN_CONSOLE
+extern void console_restore_palette(void);
+#endif
+asmlinkage void sys_sync(void);	/* it's really int */
+
+/* Pretty sick eh? */
+void prom_sync_me(long *args)
+{
+	unsigned long prom_tba, flags;
+
+	save_and_cli(flags);
+	__asm__ __volatile__("flushw; rdpr %%tba, %0\n\t" : "=r" (prom_tba));
+	__asm__ __volatile__("wrpr %0, 0x0, %%tba\n\t" : : "r" (&sparc64_ttable_tl0));
+
+#ifdef CONFIG_SUN_CONSOLE
+        console_restore_palette ();
+#endif
+	prom_printf("PROM SYNC COMMAND...\n");
+	show_free_areas();
+	if(current->pid != 0) {
+		sti();
+		sys_sync();
+		cli();
+	}
+	prom_printf("Returning to prom\n");
+
+	__asm__ __volatile__("flushw; wrpr %0, 0x0, %%tba\n\t" : : "r" (prom_tba));
+	restore_flags(flags);
+
+	return;
+}
+
+extern void rs_kgdb_hook(int tty_num); /* sparc/serial.c */
+
+unsigned int boot_flags;
+#define BOOTME_DEBUG  0x1
+#define BOOTME_SINGLE 0x2
+#define BOOTME_KGDB   0x4
+
+#ifdef CONFIG_SUN_CONSOLE
+extern char *console_fb_path;
+static int console_fb = 0;
+#endif
+static unsigned long memory_size = 0;
+
+void kernel_enter_debugger(void)
+{
+	if (boot_flags & BOOTME_KGDB) {
+		printk("KGDB: Entered\n");
+		breakpoint();
+	}
+}
+
+int obp_system_intr(void)
+{
+	if (boot_flags & BOOTME_KGDB) {
+		printk("KGDB: system interrupted\n");
+		breakpoint();
+		return 1;
+	}
+	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.
+ */
+__initfunc(static void 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");
+		halt();
+		break;
+	default:
+		printk("Unknown boot switch (-%c)\n", c);
+		break;
+	}
+}
+
+__initfunc(static void 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;
+		else if (*commands == '-') {
+			commands++;
+			while (*commands && *commands != ' ')
+				process_switch(*commands++);
+		} else if (strlen(commands) >= 9
+			   && !strncmp(commands, "kgdb=tty", 8)) {
+			boot_flags |= BOOTME_KGDB;
+			switch (commands[8]) {
+#ifdef CONFIG_SUN_SERIAL
+			case 'a':
+				rs_kgdb_hook(0);
+				prom_printf("KGDB: Using serial line /dev/ttya.\n");
+				break;
+			case 'b':
+				rs_kgdb_hook(1);
+				prom_printf("KGDB: Using serial line /dev/ttyb.\n");
+				break;
+#endif
+			default:
+				printk("KGDB: Unknown tty line.\n");
+				boot_flags &= ~BOOTME_KGDB;
+				break;
+			}
+			commands += 9;
+		} else {
+#if CONFIG_SUN_CONSOLE
+			if (!strncmp(commands, "console=", 8)) {
+				commands += 8;
+				if (!strncmp (commands, "ttya", 4)) {
+					console_fb = 2;
+					prom_printf ("Using /dev/ttya as console.\n");
+				} else if (!strncmp (commands, "ttyb", 4)) {
+					console_fb = 3;
+					prom_printf ("Using /dev/ttyb as console.\n");
+				} else {
+					console_fb = 1;
+					console_fb_path = commands;
+				}
+			} else
+#endif
+			if (!strncmp(commands, "mem=", 4)) {
+				/*
+				 * "mem=XXX[kKmM] overrides the PROM-reported
+				 * memory size.
+				 */
+				memory_size = simple_strtoul(commands + 4,
+							     &commands, 0);
+				if (*commands == 'K' || *commands == 'k') {
+					memory_size <<= 10;
+					commands++;
+				} else if (*commands=='M' || *commands=='m') {
+					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 long sun_serial_setup(unsigned long);
+
+extern unsigned short root_flags;
+extern unsigned short root_dev;
+extern unsigned short ram_flags;
+extern unsigned ramdisk_image;
+extern unsigned ramdisk_size;
+#define RAMDISK_IMAGE_START_MASK	0x07FF
+#define RAMDISK_PROMPT_FLAG		0x8000
+#define RAMDISK_LOAD_FLAG		0x4000
+
+extern int root_mountflags;
+
+extern void register_console(void (*proc)(const char *));
+
+char saved_command_line[256];
+char reboot_command[256];
+
+__initfunc(void setup_arch(char **cmdline_p,
+	unsigned long * memory_start_p, unsigned long * memory_end_p))
+{
+	int total, i;
+
+	/* Initialize PROM console and command line. */
+	*cmdline_p = prom_getbootargs();
+	strcpy(saved_command_line, *cmdline_p);
+
+	printk("ARCH: SUN4U\n");
+
+	boot_flags_init(*cmdline_p);
+#if 0	
+	if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && 
+	   ((*(short *)linux_dbvec) != -1)) {
+		printk("Booted under KADB. Syncing trap table.\n");
+		(*(linux_dbvec->teach_debugger))();
+	}
+	if((boot_flags & BOOTME_KGDB)) {
+		set_debug_traps();
+		prom_printf ("Breakpoint!\n");
+		breakpoint();
+	}
+#endif	
+
+	idprom_init();
+	load_mmu();
+	total = prom_probe_memory();
+	*memory_start_p = (((unsigned long) &end));
+
+	for(i=0; sp_banks[i].num_bytes != 0; i++) {
+		end_of_phys_memory = sp_banks[i].base_addr +
+			sp_banks[i].num_bytes;
+		if (memory_size) {
+			if (end_of_phys_memory > memory_size) {
+				sp_banks[i].num_bytes -=
+					(end_of_phys_memory - memory_size);
+				end_of_phys_memory = memory_size;
+				sp_banks[++i].base_addr = 0xdeadbeef;
+				sp_banks[i].num_bytes = 0;
+			}
+		}
+	}
+	prom_setsync(prom_sync_me);
+
+	*memory_end_p = (end_of_phys_memory + KERNBASE);
+	if (!root_flags)
+		root_mountflags &= ~MS_RDONLY;
+	ROOT_DEV = to_kdev_t(root_dev);
+#ifdef CONFIG_BLK_DEV_RAM
+	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
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (ramdisk_image) {
+		initrd_start = ramdisk_image;
+		if (initrd_start < KERNBASE) initrd_start += KERNBASE;
+		initrd_end = initrd_start + ramdisk_size;
+		if (initrd_end > *memory_end_p) {
+			printk(KERN_CRIT "initrd extends beyond end of memory "
+		                 	 "(0x%016lx > 0x%016lx)\ndisabling initrd\n",
+		       			 initrd_end,*memory_end_p);
+			initrd_start = 0;
+		}
+		if (initrd_start >= *memory_start_p && initrd_start < *memory_start_p + 2 * PAGE_SIZE) {
+			initrd_below_start_ok = 1;
+			*memory_start_p = PAGE_ALIGN (initrd_end);
+		}
+	}
+#endif	
+
+	/* Due to stack alignment restrictions and assumptions... */
+#if 0	
+	init_task.mm->mmap->vm_page_prot = PAGE_SHARED;
+	init_task.mm->mmap->vm_start = KERNBASE;
+	init_task.mm->mmap->vm_end = *memory_end_p;
+	init_task.mm->context = (unsigned long) NO_CONTEXT;
+#endif	
+
+#ifdef CONFIG_SUN_SERIAL
+	*memory_start_p = sun_serial_setup(*memory_start_p); /* set this up ASAP */
+#endif
+	{
+		extern int serial_console;  /* in console.c, of course */
+#if !CONFIG_SUN_SERIAL
+		serial_console = 0;
+#else
+		switch (console_fb) {
+		case 0: /* Let get our io devices from prom */
+			{
+				int idev = prom_query_input_device();
+				int 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\n");
+					prom_halt();
+				}
+			}
+			break;
+		case 1: serial_console = 0; break; /* Force one of the framebuffers as console */
+		case 2: serial_console = 1; break; /* Force ttya as console */
+		case 3: serial_console = 2; break; /* Force ttyb as console */
+		}
+#endif
+	}
+}
+
+asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on)
+{
+	return -EIO;
+}
+
+/* BUFFER is PAGE_SIZE bytes long. */
+
+extern char *sparc_cpu_type[];
+extern char *sparc_fpu_type[];
+
+extern char *smp_info(void);
+extern char *mmu_info(void);
+
+int get_cpuinfo(char *buffer)
+{
+	int cpuid=get_cpuid();
+
+	return sprintf(buffer, "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: %d\n"
+	    "ncpus active\t: %d\n"
+#ifndef __SMP__
+            "BogoMips\t: %lu.%02lu\n"
+#else
+	    "Cpu0Bogo\t: %lu.%02lu\n"
+	    "Cpu1Bogo\t: %lu.%02lu\n"
+	    "Cpu2Bogo\t: %lu.%02lu\n"
+	    "Cpu3Bogo\t: %lu.%02lu\n"
+#endif
+	    "%s"
+#ifdef __SMP__
+	    "%s"
+#endif
+	    ,
+            sparc_cpu_type[cpuid],
+            sparc_fpu_type[cpuid],
+            prom_rev, prom_prev >> 16, (prom_prev >> 8) & 0xff, prom_prev & 0xff,
+	    linux_num_cpus, smp_num_cpus,
+#ifndef __SMP__
+            loops_per_sec/500000, (loops_per_sec/5000) % 100,
+#else
+	    cpu_data[0].udelay_val/500000, (cpu_data[0].udelay_val/5000)%100,
+	    cpu_data[1].udelay_val/500000, (cpu_data[1].udelay_val/5000)%100,
+	    cpu_data[2].udelay_val/500000, (cpu_data[2].udelay_val/5000)%100,
+	    cpu_data[3].udelay_val/500000, (cpu_data[3].udelay_val/5000)%100,
+#endif
+	    mmu_info()
+#ifdef __SMP__
+	    , smp_info()
+#endif
+            );
+
+}