Import of Linux/MIPS 1.3.0

1 files changed, 181 insertions, 0 deletions

diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
new file mode 100644
index 000000000..5cc4c5d7d
--- /dev/null
+++ b/arch/i386/kernel/setup.c
@@ -0,0 +1,181 @@
+/*
+ *  linux/arch/i386/kernel/setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ */
+
+/*
+ * This file handles the architecture-dependent parts of process handling..
+ */
+
+#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 <linux/ioport.h>
+#include <linux/delay.h>
+
+#include <asm/segment.h>
+#include <asm/system.h>
+
+/*
+ * Tell us the machine setup..
+ */
+char hard_math = 0;		/* set by boot/head.S */
+char x86 = 0;			/* set by boot/head.S to 3 or 4 */
+char x86_model = 0;		/* set by boot/head.S */
+char x86_mask = 0;		/* set by boot/head.S */
+int x86_capability = 0;		/* set by boot/head.S */
+int fdiv_bug = 0;		/* set if Pentium(TM) with FP bug */
+
+char x86_vendor_id[13] = "Unknown";
+
+char ignore_irq13 = 0;		/* set if exception 16 works */
+char wp_works_ok = 0;		/* set if paging hardware honours WP */ 
+char hlt_works_ok = 1;		/* set if the "hlt" instruction works */
+
+/*
+ * Bus types ..
+ */
+int EISA_bus = 0;
+
+/*
+ * Setup options
+ */
+struct drive_info_struct { char dummy[32]; } drive_info;
+struct screen_info screen_info;
+
+unsigned char aux_device_present;
+extern int ramdisk_size;
+extern int root_mountflags;
+extern int etext, edata, end;
+
+extern char empty_zero_page[PAGE_SIZE];
+
+/*
+ * This is set up by the setup-routine at boot-time
+ */
+#define PARAM	empty_zero_page
+#define EXT_MEM_K (*(unsigned short *) (PARAM+2))
+#define DRIVE_INFO (*(struct drive_info_struct *) (PARAM+0x80))
+#define SCREEN_INFO (*(struct screen_info *) (PARAM+0))
+#define MOUNT_ROOT_RDONLY (*(unsigned short *) (PARAM+0x1F2))
+#define RAMDISK_SIZE (*(unsigned short *) (PARAM+0x1F8))
+#define ORIG_ROOT_DEV (*(unsigned short *) (PARAM+0x1FC))
+#define AUX_DEVICE_INFO (*(unsigned char *) (PARAM+0x1FF))
+#define COMMAND_LINE ((char *) (PARAM+2048))
+#define COMMAND_LINE_SIZE 256
+
+static char command_line[COMMAND_LINE_SIZE] = { 0, };
+
+void setup_arch(char **cmdline_p,
+	unsigned long * memory_start_p, unsigned long * memory_end_p)
+{
+	unsigned long memory_start, memory_end;
+	char c = ' ', *to = command_line, *from = COMMAND_LINE;
+	int len = 0;
+
+ 	ROOT_DEV = ORIG_ROOT_DEV;
+ 	drive_info = DRIVE_INFO;
+ 	screen_info = SCREEN_INFO;
+	aux_device_present = AUX_DEVICE_INFO;
+	memory_end = (1<<20) + (EXT_MEM_K<<10);
+	memory_end &= PAGE_MASK;
+	ramdisk_size = RAMDISK_SIZE;
+#ifdef CONFIG_MAX_16M
+	if (memory_end > 16*1024*1024)
+		memory_end = 16*1024*1024;
+#endif
+	if (MOUNT_ROOT_RDONLY)
+		root_mountflags |= MS_RDONLY;
+	memory_start = (unsigned long) &end;
+	init_task.mm->start_code = TASK_SIZE;
+	init_task.mm->end_code = TASK_SIZE + (unsigned long) &etext;
+	init_task.mm->end_data = TASK_SIZE + (unsigned long) &edata;
+	init_task.mm->brk = TASK_SIZE + (unsigned long) &end;
+
+	for (;;) {
+		if (c == ' ' && *(unsigned long *)from == *(unsigned long *)"mem=") {
+			memory_end = simple_strtoul(from+4, &from, 0);
+			if ( *from == 'K' || *from == 'k' ) {
+				memory_end = memory_end << 10;
+				from++;
+			} else if ( *from == 'M' || *from == 'm' ) {
+				memory_end = memory_end << 20;
+				from++;
+			}
+		}
+		c = *(from++);
+		if (!c)
+			break;
+		if (COMMAND_LINE_SIZE <= ++len)
+			break;
+		*(to++) = c;
+	}
+	*to = '\0';
+	*cmdline_p = command_line;
+	*memory_start_p = memory_start;
+	*memory_end_p = memory_end;
+	/* request io space for devices used on all i[345]86 PC'S */
+	request_region(0x00,0x20,"dma1");
+	request_region(0x40,0x20,"timer");
+	request_region(0x70,0x10,"rtc");
+	request_region(0x80,0x20,"dma page reg");
+	request_region(0xc0,0x20,"dma2");
+	request_region(0xf0,0x2,"npu");
+	request_region(0xf8,0x8,"npu");
+}
+
+int get_cpuinfo(char * buffer)
+{
+	char *model[2][9]={{"DX","SX","DX/2","4","SX/2","6",
+				"DX/2-WB","DX/4"},
+			{"Pentium 60/66","Pentium 90/100","3",
+				"4","5","6","7","8"}};
+	char mask[2];
+	mask[0] = x86_mask+'@';
+	mask[1] = '\0';
+	return sprintf(buffer,"cpu\t\t: %c86\n"
+			      "model\t\t: %s\n"
+			      "mask\t\t: %s\n"
+			      "vid\t\t: %s\n"
+			      "fdiv_bug\t: %s\n"
+			      "math\t\t: %s\n"
+			      "hlt\t\t: %s\n"
+			      "wp\t\t: %s\n"
+			      "Integrated NPU\t: %s\n"
+			      "Enhanced VM86\t: %s\n"
+			      "IO Breakpoints\t: %s\n"
+			      "4MB Pages\t: %s\n"
+			      "TS Counters\t: %s\n"
+			      "Pentium MSR\t: %s\n"
+			      "Mach. Ch. Exep.\t: %s\n"
+			      "CMPXCHGB8B\t: %s\n"
+		              "BogoMips\t: %lu.%02lu\n",
+			      x86+'0', 
+			      x86_model ? model[x86-4][x86_model-1] : "Unknown",
+			      x86_mask ? mask : "Unknown",
+			      x86_vendor_id,
+			      fdiv_bug ? "yes" : "no",
+			      hard_math ? "yes" : "no",
+			      hlt_works_ok ? "yes" : "no",
+			      wp_works_ok ? "yes" : "no",
+			      x86_capability & 1 ? "yes" : "no",
+			      x86_capability & 2 ? "yes" : "no",
+			      x86_capability & 4 ? "yes" : "no",
+			      x86_capability & 8 ? "yes" : "no",
+			      x86_capability & 16 ? "yes" : "no",
+			      x86_capability & 32 ? "yes" : "no",
+			      x86_capability & 128 ? "yes" : "no",
+			      x86_capability & 256 ? "yes" : "no",
+		              loops_per_sec/500000, (loops_per_sec/5000) % 100
+			      );
+}