patch-2.1.48 linux/arch/ppc/kernel/pmac_setup.c

• Lines: 261
• Date: Thu Jul 31 13:09:17 1997
• Orig file: v2.1.47/linux/arch/ppc/kernel/pmac_setup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.47/linux/arch/ppc/kernel/pmac_setup.c linux/arch/ppc/kernel/pmac_setup.c
@@ -0,0 +1,260 @@
+/*
+ *  linux/arch/ppc/kernel/setup.c
+ *
+ *  PowerPC version 
+ *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ *
+ *  Adapted for Power Macintosh by Paul Mackerras
+ *    Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
+ *
+ *  Derived from "arch/alpha/kernel/setup.c"
+ *    Copyright (C) 1995 Linus Torvalds
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ *
+ */
+
+/*
+ * 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/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <asm/prom.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/ide.h>
+
+extern int root_mountflags;
+
+extern char command_line[];
+char saved_command_line[256];
+
+unsigned char aux_device_present;	/* XXX */
+unsigned char kbd_read_mask;
+unsigned char drive_info;
+
+#define DEFAULT_ROOT_DEVICE 0x0801	/* sda1 - slightly silly choice */
+
+extern unsigned long find_available_memory(void);
+
+unsigned long bios32_init(unsigned long memory_start, unsigned long memory_end)
+{
+	return memory_start;
+}
+
+void setup_arch(char **cmdline_p,
+	unsigned long * memory_start_p, unsigned long * memory_end_p)
+{
+	extern unsigned long *end_of_DRAM;
+	struct device_node *cpu;
+	int *fp;
+
+	strcpy(saved_command_line, command_line);
+	*cmdline_p = command_line;
+
+	*memory_start_p = find_available_memory();
+	*memory_end_p = (unsigned long) end_of_DRAM;
+
+	set_prom_callback();
+
+	*memory_start_p = copy_device_tree(*memory_start_p, *memory_end_p);
+
+	/* Set loops_per_sec to a half-way reasonable value,
+	   for use until calibrate_delay gets called. */
+	cpu = find_type_devices("cpu");
+	if (cpu != 0) {
+		fp = (int *) get_property(cpu, "clock-frequency", NULL);
+		if (fp != 0) {
+			switch (_get_PVR() >> 16) {
+			case 4:		/* 604 */
+				loops_per_sec = *fp;
+				break;
+			default:	/* 601, 603, etc. */
+				loops_per_sec = *fp / 2;
+			}
+		} else
+			loops_per_sec = 50000000;
+	}
+}
+
+char *bootpath;
+char bootdevice[256];
+void *boot_host;
+int boot_target;
+int boot_part;
+kdev_t boot_dev;
+
+unsigned long
+pmac_find_devices(unsigned long mem_start, unsigned long mem_end)
+{
+	struct device_node *chosen_np;
+
+	nvram_init();
+	via_cuda_init();
+	read_rtc_time();
+	pmac_find_display();
+	bootpath = NULL;
+	chosen_np = find_devices("chosen");
+	if (chosen_np != NULL)
+		bootpath = (char *) get_property(chosen_np, "bootpath", NULL);
+	if (bootpath != NULL) {
+		/*
+		 * There's a bug in the prom.  (Why am I not surprised.)
+		 * If you pass a path like scsi/sd@1:0 to canon, it returns
+		 * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
+		 * That is, the scsi target number doesn't get preserved.
+		 */
+		call_prom("canon", 3, 1, bootpath, bootdevice, sizeof(bootdevice));
+	}
+	return mem_start;
+}
+
+void
+note_scsi_host(struct device_node *node, void *host)
+{
+	int l;
+	char *p;
+
+	l = strlen(node->full_name);
+	if (strncmp(node->full_name, bootdevice, l) == 0
+	    && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
+		boot_host = host;
+		p = strstr(bootpath, "/sd@");
+		if (p != NULL) {
+			p += 4;
+			boot_target = simple_strtoul(p, NULL, 10);
+			p = strchr(p, ':');
+			if (p != NULL)
+				boot_part = simple_strtoul(p + 1, NULL, 10);
+		}
+	}
+}
+
+void find_scsi_boot()
+{
+	int dev;
+
+	if (kdev_t_to_nr(ROOT_DEV) != 0)
+		return;
+	ROOT_DEV = to_kdev_t(DEFAULT_ROOT_DEVICE);
+	if (boot_host == NULL)
+		return;
+	dev = sd_find_target(boot_host, boot_target);
+	if (dev == 0)
+		return;
+	boot_dev = to_kdev_t(dev + boot_part);
+}
+
+void ide_init_hwif_ports(ide_ioreg_t *p, ide_ioreg_t base, int *irq)
+{
+	struct device_node *np;
+	int i;
+	static struct device_node *atas;
+	static int atas_valid;
+
+	*p = 0;
+	*irq = 0;
+	if (!atas_valid) {
+		atas = find_devices("ATA");
+		atas_valid = 1;
+	}
+	for (i = (int)base, np = atas; i > 0 && np != NULL; --i, np = np->next)
+		;
+	if (np == NULL)
+		return;
+	if (np->n_addrs == 0) {
+		printk("ide: no addresses for device %s\n", np->full_name);
+		return;
+	}
+	if (np->n_intrs == 0) {
+		printk("ide: no intrs for device %s, using 13\n",
+		       np->full_name);
+		np->intrs[0] = 13;
+	}
+	base = (unsigned long) ioremap(np->addrs[0].address, 0x200);
+	for (i = 0; i < 8; ++i)
+		*p++ = base + i * 0x10;
+	*p = base + 0x160;
+	*irq = np->intrs[0];
+}
+
+int sys_ioperm(unsigned long from, unsigned long num, int on)
+{
+	return -EIO;
+}
+
+#if 0
+extern char builtin_ramdisk_image;
+extern long builtin_ramdisk_size;
+#endif
+
+void
+builtin_ramdisk_init(void)
+{
+#if 0
+	if ((ROOT_DEV == to_kdev_t(DEFAULT_ROOT_DEVICE)) && (builtin_ramdisk_size != 0))
+	{
+		rd_preloaded_init(&builtin_ramdisk_image, builtin_ramdisk_size);
+	} else
+#endif
+	{  /* Not ramdisk - assume root needs to be mounted read only */
+		root_mountflags |= MS_RDONLY;
+	}
+}
+
+int
+get_cpuinfo(char *buffer)
+{
+	int pvr = _get_PVR();
+	char *model;
+	struct device_node *cpu;
+	int l, *fp;
+
+	l = 0;
+	cpu = find_type_devices("cpu");
+	if (cpu != 0) {
+		fp = (int *) get_property(cpu, "clock-frequency", NULL);
+		if (fp != 0)
+			l += sprintf(buffer, "%dMHz ", *fp / 1000000);
+	}
+
+	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;
+	default:
+		model = "unknown";
+		break;
+	}
+	return l + sprintf(buffer+l, "PowerPC %s rev %d.%d\n", model,
+			   (pvr & 0xff) >> 8, pvr & 0xff);
+}