patch-2.4.20 linux-2.4.20/arch/ppc/platforms/pmac_setup.c

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diff -urN linux-2.4.19/arch/ppc/platforms/pmac_setup.c linux-2.4.20/arch/ppc/platforms/pmac_setup.c
@@ -0,0 +1,957 @@
+/*
+ * BK Id: %F% %I% %G% %U% %#%
+ */
+/*
+ *  arch/ppc/platforms/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/config.h>
+#include <linux/init.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/slab.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 <linux/major.h>
+#include <linux/blk.h>
+#include <linux/vt_kern.h>
+#include <linux/console.h>
+#include <linux/ide.h>
+#include <linux/pci.h>
+#include <linux/adb.h>
+#include <linux/cuda.h>
+#include <linux/pmu.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/blkdev.h>
+#include <linux/genhd.h>
+
+#include <asm/processor.h>
+#include <asm/sections.h>
+#include <asm/prom.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/pci-bridge.h>
+#include <asm/ohare.h>
+#include <asm/mediabay.h>
+#include <asm/machdep.h>
+#include <asm/keyboard.h>
+#include <asm/dma.h>
+#include <asm/bootx.h>
+#include <asm/cputable.h>
+#include <asm/btext.h>
+#include <asm/pmac_feature.h>
+#include <asm/time.h>
+
+#include "pmac_pic.h"
+#include "mem_pieces.h"
+#include "scsi.h" /* sd_find_target */
+#include "sd.h"
+#include "mac.h"
+
+extern long pmac_time_init(void);
+extern unsigned long pmac_get_rtc_time(void);
+extern int pmac_set_rtc_time(unsigned long nowtime);
+extern void pmac_read_rtc_time(void);
+extern void pmac_calibrate_decr(void);
+extern void pmac_pcibios_fixup(void);
+extern void pmac_find_bridges(void);
+extern int pmac_ide_check_base(ide_ioreg_t base);
+extern ide_ioreg_t pmac_ide_get_base(int index);
+extern void pmac_ide_init_hwif_ports(hw_regs_t *hw,
+	ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq);
+
+extern int mackbd_setkeycode(unsigned int scancode, unsigned int keycode);
+extern int mackbd_getkeycode(unsigned int scancode);
+extern int mackbd_translate(unsigned char keycode, unsigned char *keycodep,
+		     char raw_mode);
+extern char mackbd_unexpected_up(unsigned char keycode);
+extern void mackbd_leds(unsigned char leds);
+extern void __init mackbd_init_hw(void);
+extern int mac_hid_kbd_translate(unsigned char scancode, unsigned char *keycode,
+				 char raw_mode);
+extern char mac_hid_kbd_unexpected_up(unsigned char keycode);
+extern void mac_hid_init_hw(void);
+extern unsigned char mac_hid_kbd_sysrq_xlate[];
+extern unsigned char pckbd_sysrq_xlate[];
+extern unsigned char mackbd_sysrq_xlate[];
+extern int pckbd_setkeycode(unsigned int scancode, unsigned int keycode);
+extern int pckbd_getkeycode(unsigned int scancode);
+extern int pckbd_translate(unsigned char scancode, unsigned char *keycode,
+			   char raw_mode);
+extern char pckbd_unexpected_up(unsigned char keycode);
+extern int keyboard_sends_linux_keycodes;
+extern void pmac_nvram_update(void);
+
+extern int pmac_pci_enable_device_hook(struct pci_dev *dev, int initial);
+extern void pmac_pcibios_after_init(void);
+
+struct device_node *memory_node;
+
+unsigned char drive_info;
+
+int ppc_override_l2cr = 0;
+int ppc_override_l2cr_value;
+int has_l2cache = 0;
+
+static int current_root_goodness = -1;
+
+extern char saved_command_line[];
+
+extern int pmac_newworld;
+
+#define DEFAULT_ROOT_DEVICE 0x0801	/* sda1 - slightly silly choice */
+
+extern void zs_kgdb_hook(int tty_num);
+static void ohare_init(void);
+#ifdef CONFIG_BOOTX_TEXT
+void pmac_progress(char *s, unsigned short hex);
+#endif
+
+sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
+
+#ifdef CONFIG_SMP
+extern struct smp_ops_t psurge_smp_ops;
+extern struct smp_ops_t core99_smp_ops;
+#endif /* CONFIG_SMP */
+
+/*
+ * Assume here that all clock rates are the same in a
+ * smp system.  -- Cort
+ */
+int __openfirmware
+of_show_percpuinfo(struct seq_file *m, int i)
+{
+	struct device_node *cpu_node;
+	int *fp, s;
+			
+	cpu_node = find_type_devices("cpu");
+	if (!cpu_node)
+		return 0;
+	for (s = 0; s < i && cpu_node->next; s++)
+		cpu_node = cpu_node->next;
+	fp = (int *) get_property(cpu_node, "clock-frequency", NULL);
+	if (fp)
+		seq_printf(m, "clock\t\t: %dMHz\n", *fp / 1000000);
+	return 0;
+}
+
+int __pmac
+pmac_show_cpuinfo(struct seq_file *m)
+{
+	struct device_node *np;
+	char *pp;
+	int plen;
+	int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
+		NULL, PMAC_MB_INFO_MODEL, 0);
+	unsigned int mbflags = (unsigned int)pmac_call_feature(PMAC_FTR_GET_MB_INFO,
+		NULL, PMAC_MB_INFO_FLAGS, 0);
+	char* mbname;
+
+	if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (int)&mbname) != 0)
+		mbname = "Unknown";
+		
+	/* find motherboard type */
+	seq_printf(m, "machine\t\t: ");
+	np = find_devices("device-tree");
+	if (np != NULL) {
+		pp = (char *) get_property(np, "model", NULL);
+		if (pp != NULL)
+			seq_printf(m, "%s\n", pp);
+		else
+			seq_printf(m, "PowerMac\n");
+		pp = (char *) get_property(np, "compatible", &plen);
+		if (pp != NULL) {
+			seq_printf(m, "motherboard\t:");
+			while (plen > 0) {
+				int l = strlen(pp) + 1;
+				seq_printf(m, " %s", pp);
+				plen -= l;
+				pp += l;
+			}
+			seq_printf(m, "\n");
+		}
+	} else
+		seq_printf(m, "PowerMac\n");
+
+	/* print parsed model */
+	seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
+	seq_printf(m, "pmac flags\t: %08x\n", mbflags);
+
+	/* find l2 cache info */
+	np = find_devices("l2-cache");
+	if (np == 0)
+		np = find_type_devices("cache");
+	if (np != 0) {
+		unsigned int *ic = (unsigned int *)
+			get_property(np, "i-cache-size", NULL);
+		unsigned int *dc = (unsigned int *)
+			get_property(np, "d-cache-size", NULL);
+		seq_printf(m, "L2 cache\t:");
+		has_l2cache = 1;
+		if (get_property(np, "cache-unified", NULL) != 0 && dc) {
+			seq_printf(m, " %dK unified", *dc / 1024);
+		} else {
+			if (ic)
+				seq_printf(m, " %dK instruction", *ic / 1024);
+			if (dc)
+				seq_printf(m, "%s %dK data",
+					   (ic? " +": ""), *dc / 1024);
+		}
+		pp = get_property(np, "ram-type", NULL);
+		if (pp)
+			seq_printf(m, " %s", pp);
+		seq_printf(m, "\n");
+	}
+
+	/* find ram info */
+	np = find_devices("memory");
+	if (np != 0) {
+		int n;
+		struct reg_property *reg = (struct reg_property *)
+			get_property(np, "reg", &n);
+		
+		if (reg != 0) {
+			unsigned long total = 0;
+
+			for (n /= sizeof(struct reg_property); n > 0; --n)
+				total += (reg++)->size;
+			seq_printf(m, "memory\t\t: %luMB\n", total >> 20);
+		}
+	}
+
+	/* Checks "l2cr-value" property in the registry */
+	np = find_devices("cpus");		
+	if (np == 0)
+		np = find_type_devices("cpu");		
+	if (np != 0) {
+		unsigned int *l2cr = (unsigned int *)
+			get_property(np, "l2cr-value", NULL);
+		if (l2cr != 0) {
+			seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr);
+		}
+	}
+	
+	/* Indicate newworld/oldworld */
+	seq_printf(m, "pmac-generation\t: %s\n",
+		   pmac_newworld ? "NewWorld" : "OldWorld");
+	
+
+	return 0;
+}
+
+#ifdef CONFIG_VT
+/*
+ * Dummy mksound function that does nothing.
+ * The real one is in the dmasound driver.
+ */
+static void __pmac
+pmac_mksound(unsigned int hz, unsigned int ticks)
+{
+}
+#endif /* CONFIG_VT */
+
+static volatile u32 *sysctrl_regs;
+
+void __init
+pmac_setup_arch(void)
+{
+	struct device_node *cpu;
+	int *fp;
+	unsigned long pvr;
+	
+	pvr = PVR_VER(mfspr(PVR));
+
+	/* Set loops_per_jiffy 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) {
+			if (pvr == 4 || pvr >= 8)
+				/* 604, G3, G4 etc. */
+				loops_per_jiffy = *fp / HZ;
+			else
+				/* 601, 603, etc. */
+				loops_per_jiffy = *fp / (2*HZ);
+		} else
+			loops_per_jiffy = 50000000 / HZ;
+	}
+
+	/* this area has the CPU identification register
+	   and some registers used by smp boards */
+	sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
+	ohare_init();
+
+	/* Lookup PCI hosts */
+	pmac_find_bridges();
+	
+	/* Checks "l2cr-value" property in the registry */
+	if (cur_cpu_spec[0]->cpu_features & CPU_FTR_L2CR) {
+		struct device_node *np = find_devices("cpus");		
+		if (np == 0)
+			np = find_type_devices("cpu");		
+		if (np != 0) {
+			unsigned int *l2cr = (unsigned int *)
+				get_property(np, "l2cr-value", NULL);
+			if (l2cr != 0) {
+				ppc_override_l2cr = 1;
+				ppc_override_l2cr_value = *l2cr;
+				_set_L2CR(0);
+				_set_L2CR(ppc_override_l2cr_value);
+			}
+		}
+	}
+
+	if (ppc_override_l2cr)
+		printk(KERN_INFO "L2CR overriden (0x%x), backside cache is %s\n",
+			ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000)
+				? "enabled" : "disabled");
+	
+#ifdef CONFIG_KGDB
+	zs_kgdb_hook(0);
+#endif
+
+#ifdef CONFIG_ADB_CUDA
+	find_via_cuda();
+#else
+	if (find_devices("via-cuda")) {
+		printk("WARNING ! Your machine is Cuda based but your kernel\n");
+		printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
+	}
+#endif	
+#ifdef CONFIG_ADB_PMU
+	find_via_pmu();
+#else
+	if (find_devices("via-pmu")) {
+		printk("WARNING ! Your machine is PMU based but your kernel\n");
+		printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
+	}
+#endif	
+#ifdef CONFIG_NVRAM
+	pmac_nvram_init();
+#endif
+#ifdef CONFIG_DUMMY_CONSOLE
+	conswitchp = &dummy_con;
+#endif
+#ifdef CONFIG_VT
+	kd_mksound = pmac_mksound;
+#endif
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (initrd_start)
+		ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
+	else
+#endif
+		ROOT_DEV = to_kdev_t(DEFAULT_ROOT_DEVICE);
+
+#ifdef CONFIG_SMP
+	/* Check for Core99 */
+	if (find_devices("uni-n"))
+		ppc_md.smp_ops = &core99_smp_ops;
+	else
+		ppc_md.smp_ops = &psurge_smp_ops;
+#endif /* CONFIG_SMP */
+
+	pci_create_OF_bus_map();
+}
+
+static void __init ohare_init(void)
+{
+	/*
+	 * Turn on the L2 cache.
+	 * We assume that we have a PSX memory controller iff
+	 * we have an ohare I/O controller.
+	 */
+	if (find_devices("ohare") != NULL) {
+		if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
+			if (sysctrl_regs[4] & 0x10)
+				sysctrl_regs[4] |= 0x04000020;
+			else
+				sysctrl_regs[4] |= 0x04000000;
+			if(has_l2cache)
+				printk(KERN_INFO "Level 2 cache enabled\n");
+		}
+	}
+}
+
+extern char *bootpath;
+extern char *bootdevice;
+void *boot_host;
+int boot_target;
+int boot_part;
+extern kdev_t boot_dev;
+
+void __init
+pmac_init2(void)
+{
+#ifdef CONFIG_ADB_PMU
+	via_pmu_start();
+#endif
+#ifdef CONFIG_ADB_CUDA
+	via_cuda_start();
+#endif
+#ifdef CONFIG_PMAC_PBOOK
+	media_bay_init();
+#endif
+	pmac_feature_late_init();
+}
+
+/* Borrowed from fs/partition/check.c */
+static unsigned char* __init
+read_one_block(struct block_device *bdev, unsigned long n, struct page **v)
+{
+	struct address_space *mapping = bdev->bd_inode->i_mapping;
+	int sect = PAGE_CACHE_SIZE / 512;
+	struct page *page;
+
+	page = read_cache_page(mapping, n/sect,
+			(filler_t *)mapping->a_ops->readpage, NULL);
+	if (!IS_ERR(page)) {
+		wait_on_page(page);
+		if (!Page_Uptodate(page))
+			goto fail;
+		if (PageError(page))
+			goto fail;
+		*v = page;
+		return (unsigned char *)page_address(page) + 512 * (n % sect);
+fail:
+		page_cache_release(page);
+	}
+	*v = NULL;
+	return NULL;
+}
+
+#ifdef CONFIG_SCSI
+void __init
+note_scsi_host(struct device_node *node, void *host)
+{
+	int l;
+	char *p;
+
+	l = strlen(node->full_name);
+	if (bootpath != NULL && bootdevice != NULL
+	    && strncmp(node->full_name, bootdevice, l) == 0
+	    && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
+		boot_host = host;
+		/*
+		 * There's a bug in OF 1.0.5.  (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.
+		 * So we pick the target number out of bootpath and use that.
+		 */
+		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);
+		}
+	}
+}
+#endif /* CONFIG_SCSI */
+
+#if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
+kdev_t __init
+find_ide_boot(void)
+{
+	char *p;
+	int n;
+	kdev_t __init pmac_find_ide_boot(char *bootdevice, int n);
+
+	if (bootdevice == NULL)
+		return 0;
+	p = strrchr(bootdevice, '/');
+	if (p == NULL)
+		return 0;
+	n = p - bootdevice;
+
+	return pmac_find_ide_boot(bootdevice, n);
+}
+#endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */
+
+void __init
+find_boot_device(void)
+{
+#if defined(CONFIG_SCSI) && defined(CONFIG_BLK_DEV_SD)
+	if (boot_host != NULL) {
+		boot_dev = sd_find_target(boot_host, boot_target);
+		if (boot_dev != 0)
+			return;
+	}
+#endif
+#if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
+	boot_dev = find_ide_boot();
+#endif
+}
+
+static void __init
+check_bootable_part(kdev_t dev, int blk, struct mac_partition *part)
+{
+	int goodness = 0;
+
+	macpart_fix_string(part->processor, 16);
+	macpart_fix_string(part->name, 32);
+	macpart_fix_string(part->type, 32);
+    
+	if ((be32_to_cpu(part->status) & MAC_STATUS_BOOTABLE)
+	    && strcasecmp(part->processor, "powerpc") == 0)
+		goodness++;
+
+	if (strcasecmp(part->type, "Apple_UNIX_SVR2") == 0
+	    || (strnicmp(part->type, "Linux", 5) == 0
+	    && strcasecmp(part->type, "Linux_swap") != 0)) {
+		int i, l;
+
+		goodness++;
+		l = strlen(part->name);
+		if (strcmp(part->name, "/") == 0)
+			goodness++;
+		for (i = 0; i <= l - 4; ++i) {
+			if (strnicmp(part->name + i, "root",
+				     4) == 0) {
+				goodness += 2;
+				break;
+			}
+		}
+		if (strnicmp(part->name, "swap", 4) == 0)
+			goodness--;
+	}
+
+	if (goodness > current_root_goodness) {
+		ROOT_DEV = MKDEV(MAJOR(dev), MINOR(dev) + blk);
+		current_root_goodness = goodness;
+	}
+}
+
+static void __init
+check_bootable_disk(kdev_t dev, struct block_device *bdev)
+{
+	struct mac_partition *part;
+	struct mac_driver_desc *md;
+	struct page* pg;
+	unsigned secsize, blocks_in_map, blk;
+	unsigned char* data;
+	
+	/* Check driver descriptor */
+	md = (struct mac_driver_desc *) read_one_block(bdev, 0, &pg);
+	if (!md)
+		return;
+	if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC)
+		goto fail;
+	secsize = be16_to_cpu(md->block_size);
+	page_cache_release(pg);
+	
+	/* Check if it looks like a mac partition map */
+	data = read_one_block(bdev, secsize/512, &pg);
+	if (!data)
+		goto fail;
+	part = (struct mac_partition *) (data + secsize%512);
+	if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
+		goto fail;
+
+	/* Iterate the partition map */
+	blocks_in_map = be32_to_cpu(part->map_count);
+	for (blk = 1; blk <= blocks_in_map; ++blk) {
+		int pos = blk * secsize;
+		page_cache_release(pg);
+		data = read_one_block(bdev, pos/512, &pg);
+		if (!data)
+			break;
+		part = (struct mac_partition *) (data + pos%512);
+		if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
+			break;
+		check_bootable_part(dev, blk, part);
+	}
+fail:
+	if (pg)	
+		page_cache_release(pg);
+}
+
+static int __init
+walk_bootable(struct gendisk *hd, void *data)
+{
+	int drive;
+	
+	for (drive=0; drive<hd->nr_real; drive++) {
+		kdev_t dev;
+		struct block_device *bdev;
+		int rc;
+
+		dev = MKDEV(hd->major, drive << hd->minor_shift);
+		if (boot_dev && boot_dev != dev)
+			continue;
+		bdev = bdget(kdev_t_to_nr(dev));
+		if (bdev == NULL)
+			continue;
+		rc = blkdev_get(bdev, FMODE_READ, 0, BDEV_RAW);
+		if (rc == 0) {
+			check_bootable_disk(dev, bdev);
+			blkdev_put(bdev, BDEV_RAW);
+		}
+	}
+
+	return 0;
+}
+
+void __init
+pmac_discover_root(void)
+{
+	char* p;
+
+	/* Check if root devices already got selected by other ways */
+	if (ROOT_DEV != to_kdev_t(DEFAULT_ROOT_DEVICE))
+		return;
+	p = strstr(saved_command_line, "root=");
+	if (p != NULL && (p == saved_command_line || p[-1] == ' '))
+		return;
+
+	/* Find the device used for booting if we can */
+	find_boot_device();
+
+	/* Try to locate a partition */
+	walk_gendisk(walk_bootable, NULL);
+}
+
+void __pmac
+pmac_restart(char *cmd)
+{
+#ifdef CONFIG_ADB_CUDA
+	struct adb_request req;
+#endif /* CONFIG_ADB_CUDA */
+
+#ifdef CONFIG_NVRAM
+	pmac_nvram_update();
+#endif
+	
+	switch (sys_ctrler) {
+#ifdef CONFIG_ADB_CUDA
+	case SYS_CTRLER_CUDA:
+		cuda_request(&req, NULL, 2, CUDA_PACKET,
+			     CUDA_RESET_SYSTEM);
+		for (;;)
+			cuda_poll();
+		break;
+#endif /* CONFIG_ADB_CUDA */
+#ifdef CONFIG_ADB_PMU		
+	case SYS_CTRLER_PMU:
+		pmu_restart();
+		break;
+#endif /* CONFIG_ADB_PMU */		
+	default: ;
+	}
+}
+
+void __pmac
+pmac_power_off(void)
+{
+#ifdef CONFIG_ADB_CUDA
+	struct adb_request req;
+#endif /* CONFIG_ADB_CUDA */
+
+#ifdef CONFIG_NVRAM
+	pmac_nvram_update();
+#endif
+	
+	switch (sys_ctrler) {
+#ifdef CONFIG_ADB_CUDA
+	case SYS_CTRLER_CUDA:
+		cuda_request(&req, NULL, 2, CUDA_PACKET,
+			     CUDA_POWERDOWN);
+		for (;;)
+			cuda_poll();
+		break;
+#endif /* CONFIG_ADB_CUDA */
+#ifdef CONFIG_ADB_PMU
+	case SYS_CTRLER_PMU:
+		pmu_shutdown();
+		break;
+#endif /* CONFIG_ADB_PMU */
+	default: ;
+	}
+}
+
+void __pmac
+pmac_halt(void)
+{
+   pmac_power_off();
+}
+
+
+#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
+/*
+ * IDE stuff.
+ */
+static int __pmac
+pmac_ide_check_region(ide_ioreg_t from, unsigned int extent)
+{
+#ifdef CONFIG_BLK_DEV_IDE_PMAC
+	if (pmac_ide_check_base(from) >= 0)
+		return 0;
+#endif
+	return check_region(from, extent);
+}
+
+static void __pmac
+pmac_ide_request_region(ide_ioreg_t from,
+			unsigned int extent,
+			const char *name)
+{
+#ifdef CONFIG_BLK_DEV_IDE_PMAC
+	if (pmac_ide_check_base(from) >= 0)
+		return;
+#endif
+	request_region(from, extent, name);
+}
+
+static void __pmac
+pmac_ide_release_region(ide_ioreg_t from,
+			unsigned int extent)
+{
+#ifdef CONFIG_BLK_DEV_IDE_PMAC
+	if (pmac_ide_check_base(from) >= 0)
+		return;
+#endif
+	release_region(from, extent);
+}
+
+#ifndef CONFIG_BLK_DEV_IDE_PMAC
+/*
+ * This is only used if we have a PCI IDE controller, not
+ * for the IDE controller in the ohare/paddington/heathrow/keylargo.
+ */
+static void __pmac
+pmac_ide_pci_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port,
+		ide_ioreg_t ctrl_port, int *irq)
+{
+	ide_ioreg_t reg = data_port;
+	int i;
+
+	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
+		hw->io_ports[i] = reg;
+		reg += 1;
+	}
+	hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
+}
+#endif /* CONFIG_BLK_DEV_IDE_PMAC */
+#endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
+
+/*
+ * Read in a property describing some pieces of memory.
+ */
+
+static int __init
+get_mem_prop(char *name, struct mem_pieces *mp)
+{
+	struct reg_property *rp;
+	int i, s;
+	unsigned int *ip;
+	int nac = prom_n_addr_cells(memory_node);
+	int nsc = prom_n_size_cells(memory_node);
+
+	ip = (unsigned int *) get_property(memory_node, name, &s);
+	if (ip == NULL) {
+		printk(KERN_ERR "error: couldn't get %s property on /memory\n",
+		       name);
+		return 0;
+	}
+	s /= (nsc + nac) * 4;
+	rp = mp->regions;
+	for (i = 0; i < s; ++i, ip += nac+nsc) {
+		if (nac >= 2 && ip[nac-2] != 0)
+			continue;
+		rp->address = ip[nac-1];
+		if (nsc >= 2 && ip[nac+nsc-2] != 0)
+			rp->size = ~0U;
+		else
+			rp->size = ip[nac+nsc-1];
+		++rp;
+	}
+	mp->n_regions = rp - mp->regions;
+
+	/* Make sure the pieces are sorted. */
+	mem_pieces_sort(mp);
+	mem_pieces_coalesce(mp);
+	return 1;
+}
+
+/*
+ * On systems with Open Firmware, collect information about
+ * physical RAM and which pieces are already in use.
+ * At this point, we have (at least) the first 8MB mapped with a BAT.
+ * Our text, data, bss use something over 1MB, starting at 0.
+ * Open Firmware may be using 1MB at the 4MB point.
+ */
+unsigned long __init
+pmac_find_end_of_memory(void)
+{
+	unsigned long a, total;
+	struct mem_pieces phys_mem;
+
+	/*
+	 * Find out where physical memory is, and check that it
+	 * starts at 0 and is contiguous.  It seems that RAM is
+	 * always physically contiguous on Power Macintoshes.
+	 *
+	 * Supporting discontiguous physical memory isn't hard,
+	 * it just makes the virtual <-> physical mapping functions
+	 * more complicated (or else you end up wasting space
+	 * in mem_map).
+	 */
+	memory_node = find_devices("memory");
+	if (memory_node == NULL || !get_mem_prop("reg", &phys_mem)
+	    || phys_mem.n_regions == 0)
+		panic("No RAM??");
+	a = phys_mem.regions[0].address;
+	if (a != 0)
+		panic("RAM doesn't start at physical address 0");
+	total = phys_mem.regions[0].size;
+
+	if (phys_mem.n_regions > 1) {
+		printk("RAM starting at 0x%x is not contiguous\n",
+		       phys_mem.regions[1].address);
+		printk("Using RAM from 0 to 0x%lx\n", total-1);
+	}
+
+	return total;
+}
+
+void __init
+select_adb_keyboard(void)
+{
+#ifdef CONFIG_VT
+#ifdef CONFIG_INPUT
+	ppc_md.kbd_init_hw       = mac_hid_init_hw;
+	ppc_md.kbd_translate     = mac_hid_kbd_translate;
+	ppc_md.kbd_unexpected_up = mac_hid_kbd_unexpected_up;
+	ppc_md.kbd_setkeycode    = 0;
+	ppc_md.kbd_getkeycode    = 0;
+	ppc_md.kbd_leds		 = 0;
+#ifdef CONFIG_MAGIC_SYSRQ
+#ifdef CONFIG_MAC_ADBKEYCODES
+	if (!keyboard_sends_linux_keycodes) {
+		ppc_md.ppc_kbd_sysrq_xlate = mac_hid_kbd_sysrq_xlate;
+		SYSRQ_KEY = 0x69;
+	} else
+#endif /* CONFIG_MAC_ADBKEYCODES */
+	{
+		ppc_md.ppc_kbd_sysrq_xlate = pckbd_sysrq_xlate;
+		SYSRQ_KEY = 0x54;
+	}
+#endif /* CONFIG_MAGIC_SYSRQ */
+#elif defined(CONFIG_ADB_KEYBOARD)
+	ppc_md.kbd_setkeycode       = mackbd_setkeycode;
+	ppc_md.kbd_getkeycode       = mackbd_getkeycode;
+	ppc_md.kbd_translate        = mackbd_translate;
+	ppc_md.kbd_unexpected_up    = mackbd_unexpected_up;
+	ppc_md.kbd_leds             = mackbd_leds;
+	ppc_md.kbd_init_hw          = mackbd_init_hw;
+#ifdef CONFIG_MAGIC_SYSRQ
+	ppc_md.ppc_kbd_sysrq_xlate  = mackbd_sysrq_xlate;
+	SYSRQ_KEY = 0x69;
+#endif /* CONFIG_MAGIC_SYSRQ */
+#endif /* CONFIG_INPUT_ADBHID/CONFIG_ADB_KEYBOARD */
+#endif /* CONFIG_VT */
+}
+
+void __init
+pmac_init(unsigned long r3, unsigned long r4, unsigned long r5,
+	  unsigned long r6, unsigned long r7)
+{
+	/* isa_io_base gets set in pmac_find_bridges */
+	isa_mem_base = PMAC_ISA_MEM_BASE;
+	pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
+	ISA_DMA_THRESHOLD = ~0L;
+	DMA_MODE_READ = 1;
+	DMA_MODE_WRITE = 2;
+
+	ppc_md.setup_arch     = pmac_setup_arch;
+	ppc_md.show_cpuinfo   = pmac_show_cpuinfo;
+	ppc_md.show_percpuinfo = of_show_percpuinfo;
+	ppc_md.irq_cannonicalize = NULL;
+	ppc_md.init_IRQ       = pmac_pic_init;
+	ppc_md.get_irq        = pmac_get_irq; /* Changed later on ... */
+	ppc_md.init           = pmac_init2;
+	
+	ppc_md.pcibios_fixup  = pmac_pcibios_fixup;
+	ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook;
+	ppc_md.pcibios_after_init = pmac_pcibios_after_init;
+
+	ppc_md.discover_root  = pmac_discover_root;
+
+	ppc_md.restart        = pmac_restart;
+	ppc_md.power_off      = pmac_power_off;
+	ppc_md.halt           = pmac_halt;
+
+	ppc_md.time_init      = pmac_time_init;
+	ppc_md.set_rtc_time   = pmac_set_rtc_time;
+	ppc_md.get_rtc_time   = pmac_get_rtc_time;
+	ppc_md.calibrate_decr = pmac_calibrate_decr;
+
+	ppc_md.find_end_of_memory = pmac_find_end_of_memory;
+
+	ppc_md.feature_call   = pmac_do_feature_call;
+
+	select_adb_keyboard();
+
+#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
+        ppc_ide_md.ide_check_region	= pmac_ide_check_region;
+        ppc_ide_md.ide_request_region	= pmac_ide_request_region;
+        ppc_ide_md.ide_release_region	= pmac_ide_release_region;
+#ifdef CONFIG_BLK_DEV_IDE_PMAC
+        ppc_ide_md.ide_init_hwif	= pmac_ide_init_hwif_ports;
+        ppc_ide_md.default_io_base	= pmac_ide_get_base;
+#else /* CONFIG_BLK_DEV_IDE_PMAC */
+        ppc_ide_md.ide_init_hwif	= pmac_ide_pci_init_hwif_ports;
+#endif /* CONFIG_BLK_DEV_IDE_PMAC */
+#endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */
+
+#ifdef CONFIG_BOOTX_TEXT
+	ppc_md.progress = pmac_progress;
+#endif /* CONFIG_BOOTX_TEXT */
+
+	if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);
+	
+}
+
+#ifdef CONFIG_BOOTX_TEXT
+void __init
+pmac_progress(char *s, unsigned short hex)
+{
+	if (boot_text_mapped) {
+		btext_drawstring(s);
+		btext_drawchar('\n');
+	}
+}
+#endif /* CONFIG_BOOTX_TEXT */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)