patch-1.3.45 linux/arch/ppc/kernel/setup.c

• Lines: 173
• Date: Wed Nov 15 00:37:15 1995
• Orig file: v1.3.44/linux/arch/ppc/kernel/setup.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.44/linux/arch/ppc/kernel/setup.c linux/arch/ppc/kernel/setup.c
@@ -0,0 +1,172 @@
+/*
+ *  linux/arch/ppc/kernel/setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#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/ldt.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+
+#include <asm/pgtable.h>
+extern PTE *Hash;
+extern unsigned long Hash_size, Hash_mask;
+
+char sda_root[] = "root=/dev/sda1";
+
+unsigned char aux_device_present;
+int get_cpuinfo(char *buffer)
+{
+}
+/*
+ * The format of "screen_info" is strange, and due to early
+ * i386-setup code. This is just enough to make the console
+ * code think we're on a EGA+ colour display.
+ */
+struct screen_info screen_info = {
+	0, 0,			/* orig-x, orig-y */
+	0, 0,			/* unused */
+	0,			/* orig-video-page */
+	0,			/* orig-video-mode */
+	80,			/* orig-video-cols */
+	0,0,0,			/* ega_ax, ega_bx, ega_cx */
+	25			/* orig-video-lines */
+};
+
+unsigned long bios32_init(unsigned long memory_start, unsigned long memory_end)
+{
+	return memory_start;
+}
+
+unsigned long find_end_of_memory(void)
+{
+	unsigned char dram_size = inb(0x0804);
+	unsigned long total;
+_printk("DRAM Size = %x\n", dram_size);
+_printk("Config registers = %x/%x/%x\n", inb(0x0800), inb(0x0801), inb(0x0802));
+	switch (dram_size & 0x07)
+	{
+		case 0:
+			total = 0x08000000;  /* 128M */
+			break;
+		case 1:
+			total = 0x02000000;  /* 32M */
+			break;
+		case 2:
+			total = 0x00800000;  /* 8M */
+			break;
+		case 3:
+			total = 0x00400000;  /* 4M - can't happen! */
+			break;
+		case 4:
+			total = 0x10000000;  /* 256M */
+			break;
+		case 5:
+			total = 0x04000000;  /* 64M */
+			break;
+		case 6:
+			total = 0x01000000;  /* 16M */
+			break;
+		case 7:
+			total = 0x04000000;  /* Can't happen */
+			break;
+	}
+	switch ((dram_size>>4) & 0x07)
+	{
+		case 0:
+			total += 0x08000000;  /* 128M */
+			break;
+		case 1:
+			total += 0x02000000;  /* 32M */
+			break;
+		case 2:
+			total += 0x00800000;  /* 8M */
+			break;
+		case 3:
+			total += 0x00000000;  /* Module not present */
+			break;
+		case 4:
+			total += 0x10000000;  /* 256M */
+			break;
+		case 5:
+			total += 0x04000000;  /* 64M */
+			break;
+		case 6:
+			total += 0x01000000;  /* 16M */
+			break;
+		case 7:
+			total += 0x00000000;  /* Module not present */
+			break;
+	}
+_printk("register total = %08X\n", total);	
+/* TEMP */ total = 0x01000000;
+/*_cnpause();	*/
+/* CAUTION!! This can be done more elegantly! */	
+	if (total < 0x01000000)
+	{
+		Hash_size = HASH_TABLE_SIZE_64K;
+		Hash_mask = HASH_TABLE_MASK_64K;
+	} else
+	{
+		Hash_size = HASH_TABLE_SIZE_128K;
+		Hash_mask = HASH_TABLE_MASK_128K;
+	}
+	Hash = (PTE *)((total-Hash_size)+KERNELBASE);
+	bzero(Hash, Hash_size);
+	return ((unsigned long)Hash);
+}
+
+int size_memory;
+
+#define DEFAULT_ROOT_DEVICE 0x0200	/* fd0 */
+
+void setup_arch(char **cmdline_p,
+	unsigned long * memory_start_p, unsigned long * memory_end_p)
+{
+
+  extern int _end;
+	extern char cmd_line[];
+
+	ROOT_DEV = DEFAULT_ROOT_DEVICE;
+	aux_device_present = 0xaa;
+	*cmdline_p = cmd_line;
+	*memory_start_p = (unsigned long) &_end;
+	*memory_end_p = (unsigned long *)Hash;
+	size_memory = *memory_end_p - KERNELBASE;  /* Relative size of memory */
+
+/*	_printk("setup_arch() done!  memory_start = %08X memory_end = %08X\n"
+		,*memory_start_p,*memory_end_p);*/
+
+}
+
+asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on)
+{
+	return -EIO;
+}
+
+extern char builtin_ramdisk_image;
+extern long builtin_ramdisk_size;
+
+void
+builtin_ramdisk_init(void)
+{
+	if (ROOT_DEV == DEFAULT_ROOT_DEVICE)
+	{
+		rd_preloaded_init(&builtin_ramdisk_image, builtin_ramdisk_size);
+	}
+}
+