patch-2.3.48 linux/arch/mips64/kernel/setup.c

• Lines: 187
• Date: Thu Feb 24 22:53:35 2000
• Orig file: v2.3.47/linux/arch/mips64/kernel/setup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.47/linux/arch/mips64/kernel/setup.c linux/arch/mips64/kernel/setup.c
@@ -0,0 +1,186 @@
+/* $Id: setup.c,v 1.7 2000/02/04 07:40:24 ralf Exp $
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995 Linus Torvalds
+ * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999 Ralf Baechle
+ * Copyright (C) 1996 Stoned Elipot
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/string.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/malloc.h>
+#include <linux/user.h>
+#include <linux/utsname.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#ifdef CONFIG_BLK_DEV_RAM
+#include <linux/blk.h>
+#endif
+
+#include <asm/asm.h>
+#include <asm/bootinfo.h>
+#include <asm/cachectl.h>
+#include <asm/cpu.h>
+#include <asm/io.h>
+#include <asm/stackframe.h>
+#include <asm/system.h>
+
+#ifdef CONFIG_SGI_IP27
+#include <asm/sn/sn0/addrs.h>
+#endif
+
+struct mips_cpuinfo boot_cpu_data;
+
+#ifdef CONFIG_VT
+struct screen_info screen_info;
+#endif
+
+/*
+ * Not all of the MIPS CPUs have the "wait" instruction available.  This
+ * is set to true if it is available.  The wait instruction stops the
+ * pipeline and reduces the power consumption of the CPU very much.
+ */
+char wait_available;
+
+/*
+ * Do we have a cyclecounter available?
+ */
+char cyclecounter_available;
+
+/*
+ * Set if box has EISA slots.
+ */
+int EISA_bus = 0;
+
+#ifdef CONFIG_BLK_DEV_FD
+extern struct fd_ops no_fd_ops;
+struct fd_ops *fd_ops;
+#endif
+
+#ifdef CONFIG_BLK_DEV_IDE
+extern struct ide_ops no_ide_ops;
+struct ide_ops *ide_ops;
+#endif
+
+extern struct rtc_ops no_rtc_ops;
+struct rtc_ops *rtc_ops;
+
+extern struct kbd_ops no_kbd_ops;
+struct kbd_ops *kbd_ops;
+
+/*
+ * Setup information
+ *
+ * These are initialized so they are in the .data section
+ */
+unsigned long mips_memory_upper = KSEG0;
+unsigned long mips_cputype = CPU_UNKNOWN;
+unsigned long mips_machtype = MACH_UNKNOWN;
+unsigned long mips_machgroup = MACH_GROUP_UNKNOWN;
+
+unsigned char aux_device_present;
+extern int _end;
+
+extern void load_mmu(void);
+
+static char command_line[CL_SIZE] = { 0, };
+       char saved_command_line[CL_SIZE];
+extern char arcs_cmdline[CL_SIZE];
+
+/*
+ * mips_io_port_base is the begin of the address space to which x86 style
+ * I/O ports are mapped.
+ */
+unsigned long mips_io_port_base = IO_BASE;
+
+extern void ip22_setup(void);
+extern void ip27_setup(void);
+
+static inline void cpu_probe(void)
+{
+	unsigned int prid = read_32bit_cp0_register(CP0_PRID);
+
+	switch(prid & 0xff00) {
+	case PRID_IMP_R4000:
+		if((prid & 0xff) == PRID_REV_R4400)
+			mips_cputype = CPU_R4400SC;
+		else
+			mips_cputype = CPU_R4000SC;
+		break;
+	case PRID_IMP_R4600:
+		mips_cputype = CPU_R4600;
+		break;
+	case PRID_IMP_R4700:
+		mips_cputype = CPU_R4700;
+		break;
+	case PRID_IMP_R5000:
+		mips_cputype = CPU_R5000;
+		break;
+	case PRID_IMP_NEVADA:
+		mips_cputype = CPU_NEVADA;
+		break;
+	case PRID_IMP_R8000:
+		mips_cputype = CPU_R8000;
+		break;
+	case PRID_IMP_R10000:
+		mips_cputype = CPU_R10000;
+		break;
+	default:
+		mips_cputype = CPU_UNKNOWN;
+	}
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+	unsigned long tmp;
+	unsigned long *initrd_header;
+#endif
+
+	cpu_probe();
+	load_mmu();
+
+#ifdef CONFIG_SGI_IP22
+	ip22_setup();
+#endif
+#ifdef CONFIG_SGI_IP27
+	ip27_setup();
+#endif
+
+	strncpy (command_line, arcs_cmdline, CL_SIZE);
+	memcpy(saved_command_line, command_line, CL_SIZE);
+	saved_command_line[CL_SIZE-1] = '\0';
+
+	*cmdline_p = command_line;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+#error "Initrd is broken, please fit it."
+	tmp = (((unsigned long)&_end + PAGE_SIZE-1) & PAGE_MASK) - 8;
+	if (tmp < (unsigned long)&_end)
+		tmp += PAGE_SIZE;
+	initrd_header = (unsigned long *)tmp;
+	if (initrd_header[0] == 0x494E5244) {
+		initrd_start = (unsigned long)&initrd_header[2];
+		initrd_end = initrd_start + initrd_header[1];
+		initrd_below_start_ok = 1;
+		if (initrd_end > memory_end) {
+			printk("initrd extends beyond end of memory "
+			       "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+			       initrd_end,memory_end);
+			initrd_start = 0;
+		} else
+			*memory_start_p = initrd_end;
+	}
+#endif
+}