patch-2.1.53 linux/arch/ppc/kernel/chrp_setup.c

• Lines: 181
• Date: Thu Sep 4 12:54:48 1997
• Orig file: v2.1.52/linux/arch/ppc/kernel/chrp_setup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.52/linux/arch/ppc/kernel/chrp_setup.c linux/arch/ppc/kernel/chrp_setup.c
@@ -0,0 +1,180 @@
+/*
+ *  linux/arch/ppc/kernel/setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ *  Modified by Cort Dougan (cort@cs.nmt.edu)
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#include <linux/config.h>
+#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 <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/major.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/blk.h>
+#include <linux/ioport.h>
+
+#include <asm/mmu.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+
+/* for the mac fs */
+kdev_t boot_dev;
+
+extern PTE *Hash, *Hash_end;
+extern unsigned long Hash_size, Hash_mask;
+extern int probingmem;
+extern unsigned long loops_per_sec;
+
+unsigned long empty_zero_page[1024];
+extern unsigned char aux_device_present;
+
+#ifdef CONFIG_BLK_DEV_RAM
+extern int rd_doload;		/* 1 = load ramdisk, 0 = don't load */
+extern int rd_prompt;		/* 1 = prompt for ramdisk, 0 = don't prompt */
+extern int rd_image_start;	/* starting block # of image */
+#endif
+
+
+extern char saved_command_line[256];
+
+long TotalMemory;
+
+int
+chrp_get_cpuinfo(char *buffer)
+{
+	int pvr = _get_PVR();
+	int len;
+	char *model;
+
+	switch (pvr>>16)
+	{
+	case 1:
+		model = "601";
+		break;
+	case 3:
+		model = "603";
+		break;
+	case 4:
+		model = "604";
+		break;
+	case 6:
+		model = "603e";
+		break;
+	case 7:
+		model = "603ev";
+		break;
+	case 9:
+		model = "604e";
+		break;
+	default:
+		model = "unknown";
+		break;
+	}
+
+	len = sprintf(buffer, "PowerPC %s rev %d.%d\n", model,
+		      (pvr & 0xff00) >> 8, pvr & 0xff);
+
+	len += sprintf(buffer+len, "bogomips\t: %lu.%02lu\n",
+		       (loops_per_sec+2500)/500000,
+		       ((loops_per_sec+2500)/5000) % 100);
+
+#if 0
+	/*
+	 * Ooh's and aah's info about zero'd pages in idle task
+	 */
+	{
+		extern unsigned int zerocount, zerototal, zeropage_hits,zeropage_calls;
+		len += sprintf(buffer+len,"zero pages\t: total %u (%uKb) "
+			       "current: %u (%uKb) hits: %u/%u (%lu%%)\n",
+			       zerototal, (zerototal*PAGE_SIZE)>>10,
+			       zerocount, (zerocount*PAGE_SIZE)>>10,
+			       zeropage_hits,zeropage_calls,
+			       /* : 1 below is so we don't div by zero */
+			       (zeropage_hits*100) /
+				    ((zeropage_calls)?zeropage_calls:1));
+	}
+#endif
+	return len;
+}
+
+__initfunc(void
+chrp_setup_arch(char **cmdline_p, unsigned long * memory_start_p,
+	   unsigned long * memory_end_p))
+{
+	extern char cmd_line[];
+	extern char _etext[], _edata[], _end[];
+	extern int panic_timeout;
+
+	/* Save unparsed command line copy for /proc/cmdline */
+	strcpy( saved_command_line, cmd_line );
+	*cmdline_p = cmd_line;
+
+	*memory_start_p = (unsigned long) Hash+Hash_size;
+	(unsigned long *)*memory_end_p = (unsigned long *)(TotalMemory+KERNELBASE);
+
+	/* init to some ~sane value until calibrate_delay() runs */
+	loops_per_sec = 50000000;
+	
+	/* reboot on panic */	
+	panic_timeout = 180;
+	
+	init_task.mm->start_code = PAGE_OFFSET;
+	init_task.mm->end_code = (unsigned long) _etext;
+	init_task.mm->end_data = (unsigned long) _edata;
+	init_task.mm->brk = (unsigned long) _end;	
+	
+	aux_device_present = 0xaa;
+	
+	switch ( _machine )
+	{
+	case _MACH_chrp:
+		ROOT_DEV = to_kdev_t(0x0801); /* sda1 */
+		break;
+	}
+	
+#ifdef CONFIG_BLK_DEV_RAM
+#if 0
+	ROOT_DEV = to_kdev_t(0x0200); /* floppy */
+	rd_prompt = 1;
+	rd_doload = 1;
+	rd_image_start = 0;
+#endif
+	/* initrd_start and size are setup by boot/head.S and kernel/head.S */
+	if ( initrd_start )
+	{
+		if (initrd_end > *memory_end_p)
+		{
+			printk("initrd extends beyond end of memory "
+			       "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+			       initrd_end,*memory_end_p);
+			initrd_start = 0;
+		}
+	}
+#endif
+
+	printk("Boot arguments: %s\n", cmd_line);
+	
+	request_region(0x20,0x20,"pic1");
+	request_region(0xa0,0x20,"pic2");
+	request_region(0x00,0x20,"dma1");
+	request_region(0x40,0x20,"timer");
+	request_region(0x80,0x10,"dma page reg");
+	request_region(0xc0,0x20,"dma2");
+}