powerpc: Merge 32-bit CHRP support.

SMP still needs more work but UP gets as far as starting userspace
at least.  This uses the 64-bit-style code for spinning up the cpus.

Signed-off-by: Paul Mackerras <paulus@samba.org>

8 files changed, 1220 insertions, 4 deletions

diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile
index 509622da5408..01723d491b5d 100644
--- a/arch/powerpc/platforms/Makefile
+++ b/arch/powerpc/platforms/Makefile
@@ -5,6 +5,7 @@ ifeq ($(CONFIG_PPC64),y)
 obj-$(CONFIG_PPC_PMAC)		+= powermac/
 endif
 endif
+obj-$(CONFIG_PPC_CHRP)		+= chrp/
 obj-$(CONFIG_4xx)		+= 4xx/
 obj-$(CONFIG_85xx)		+= 85xx/
 obj-$(CONFIG_PPC_PSERIES)	+= pseries/
diff --git a/arch/powerpc/platforms/chrp/Makefile b/arch/powerpc/platforms/chrp/Makefile
new file mode 100644
index 000000000000..1fde4e68414f
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/Makefile
@@ -0,0 +1,3 @@
+obj-y				+= setup.o time.o pegasos_eth.o
+obj-$(CONFIG_PCI)		+= pci.o
+obj-$(CONFIG_SMP)		+= smp.o
diff --git a/arch/powerpc/platforms/chrp/pci.c b/arch/powerpc/platforms/chrp/pci.c
new file mode 100644
index 000000000000..82c429d487f3
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/pci.c
@@ -0,0 +1,310 @@
+/*
+ * CHRP pci routines.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/hydra.h>
+#include <asm/prom.h>
+#include <asm/gg2.h>
+#include <asm/machdep.h>
+#include <asm/sections.h>
+#include <asm/pci-bridge.h>
+#include <asm/open_pic.h>
+#include <asm/grackle.h>
+#include <asm/rtas.h>
+
+/* LongTrail */
+void __iomem *gg2_pci_config_base;
+
+/*
+ * The VLSI Golden Gate II has only 512K of PCI configuration space, so we
+ * limit the bus number to 3 bits
+ */
+
+int gg2_read_config(struct pci_bus *bus, unsigned int devfn, int off,
+			   int len, u32 *val)
+{
+	volatile void __iomem *cfg_data;
+	struct pci_controller *hose = bus->sysdata;
+
+	if (bus->number > 7)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	/*
+	 * Note: the caller has already checked that off is
+	 * suitably aligned and that len is 1, 2 or 4.
+	 */
+	cfg_data = hose->cfg_data + ((bus->number<<16) | (devfn<<8) | off);
+	switch (len) {
+	case 1:
+		*val =  in_8(cfg_data);
+		break;
+	case 2:
+		*val = in_le16(cfg_data);
+		break;
+	default:
+		*val = in_le32(cfg_data);
+		break;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int gg2_write_config(struct pci_bus *bus, unsigned int devfn, int off,
+			    int len, u32 val)
+{
+	volatile void __iomem *cfg_data;
+	struct pci_controller *hose = bus->sysdata;
+
+	if (bus->number > 7)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	/*
+	 * Note: the caller has already checked that off is
+	 * suitably aligned and that len is 1, 2 or 4.
+	 */
+	cfg_data = hose->cfg_data + ((bus->number<<16) | (devfn<<8) | off);
+	switch (len) {
+	case 1:
+		out_8(cfg_data, val);
+		break;
+	case 2:
+		out_le16(cfg_data, val);
+		break;
+	default:
+		out_le32(cfg_data, val);
+		break;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops gg2_pci_ops =
+{
+	gg2_read_config,
+	gg2_write_config
+};
+
+/*
+ * Access functions for PCI config space using RTAS calls.
+ */
+int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
+		     int len, u32 *val)
+{
+	struct pci_controller *hose = bus->sysdata;
+	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
+		| (((bus->number - hose->first_busno) & 0xff) << 16)
+		| (hose->index << 24);
+        int ret = -1;
+	int rval;
+
+	rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
+	*val = ret;
+	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
+}
+
+int rtas_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
+		      int len, u32 val)
+{
+	struct pci_controller *hose = bus->sysdata;
+	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
+		| (((bus->number - hose->first_busno) & 0xff) << 16)
+		| (hose->index << 24);
+	int rval;
+
+	rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
+			 addr, len, val);
+	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops rtas_pci_ops =
+{
+	rtas_read_config,
+	rtas_write_config
+};
+
+volatile struct Hydra __iomem *Hydra = NULL;
+
+int __init
+hydra_init(void)
+{
+	struct device_node *np;
+
+	np = find_devices("mac-io");
+	if (np == NULL || np->n_addrs == 0)
+		return 0;
+	Hydra = ioremap(np->addrs[0].address, np->addrs[0].size);
+	printk("Hydra Mac I/O at %lx\n", np->addrs[0].address);
+	printk("Hydra Feature_Control was %x",
+	       in_le32(&Hydra->Feature_Control));
+	out_le32(&Hydra->Feature_Control, (HYDRA_FC_SCC_CELL_EN |
+					   HYDRA_FC_SCSI_CELL_EN |
+					   HYDRA_FC_SCCA_ENABLE |
+					   HYDRA_FC_SCCB_ENABLE |
+					   HYDRA_FC_ARB_BYPASS |
+					   HYDRA_FC_MPIC_ENABLE |
+					   HYDRA_FC_SLOW_SCC_PCLK |
+					   HYDRA_FC_MPIC_IS_MASTER));
+	printk(", now %x\n", in_le32(&Hydra->Feature_Control));
+	return 1;
+}
+
+void __init
+chrp_pcibios_fixup(void)
+{
+	struct pci_dev *dev = NULL;
+	struct device_node *np;
+
+	/* PCI interrupts are controlled by the OpenPIC */
+	for_each_pci_dev(dev) {
+		np = pci_device_to_OF_node(dev);
+		if ((np != 0) && (np->n_intrs > 0) && (np->intrs[0].line != 0))
+			dev->irq = np->intrs[0].line;
+		pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
+	}
+}
+
+#define PRG_CL_RESET_VALID 0x00010000
+
+static void __init
+setup_python(struct pci_controller *hose, struct device_node *dev)
+{
+	u32 __iomem *reg;
+	u32 val;
+	unsigned long addr = dev->addrs[0].address;
+
+	setup_indirect_pci(hose, addr + 0xf8000, addr + 0xf8010);
+
+	/* Clear the magic go-slow bit */
+	reg = ioremap(dev->addrs[0].address + 0xf6000, 0x40);
+	val = in_be32(&reg[12]);
+	if (val & PRG_CL_RESET_VALID) {
+		out_be32(&reg[12], val & ~PRG_CL_RESET_VALID);
+		in_be32(&reg[12]);
+	}
+	iounmap(reg);
+}
+
+/* Marvell Discovery II based Pegasos 2 */
+static void __init setup_peg2(struct pci_controller *hose, struct device_node *dev)
+{
+	struct device_node *root = find_path_device("/");
+	struct device_node *rtas;
+
+	rtas = of_find_node_by_name (root, "rtas");
+	if (rtas) {
+		hose->ops = &rtas_pci_ops;
+	} else {
+		printk ("RTAS supporting Pegasos OF not found, please upgrade"
+			" your firmware\n");
+	}
+	pci_assign_all_buses = 1;
+}
+
+void __init
+chrp_find_bridges(void)
+{
+	struct device_node *dev;
+	int *bus_range;
+	int len, index = -1;
+	struct pci_controller *hose;
+	unsigned int *dma;
+	char *model, *machine;
+	int is_longtrail = 0, is_mot = 0, is_pegasos = 0;
+	struct device_node *root = find_path_device("/");
+
+	/*
+	 * The PCI host bridge nodes on some machines don't have
+	 * properties to adequately identify them, so we have to
+	 * look at what sort of machine this is as well.
+	 */
+	machine = get_property(root, "model", NULL);
+	if (machine != NULL) {
+		is_longtrail = strncmp(machine, "IBM,LongTrail", 13) == 0;
+		is_mot = strncmp(machine, "MOT", 3) == 0;
+		if (strncmp(machine, "Pegasos2", 8) == 0)
+			is_pegasos = 2;
+		else if (strncmp(machine, "Pegasos", 7) == 0)
+			is_pegasos = 1;
+	}
+	for (dev = root->child; dev != NULL; dev = dev->sibling) {
+		if (dev->type == NULL || strcmp(dev->type, "pci") != 0)
+			continue;
+		++index;
+		/* The GG2 bridge on the LongTrail doesn't have an address */
+		if (dev->n_addrs < 1 && !is_longtrail) {
+			printk(KERN_WARNING "Can't use %s: no address\n",
+			       dev->full_name);
+			continue;
+		}
+		bus_range = (int *) get_property(dev, "bus-range", &len);
+		if (bus_range == NULL || len < 2 * sizeof(int)) {
+			printk(KERN_WARNING "Can't get bus-range for %s\n",
+				dev->full_name);
+			continue;
+		}
+		if (bus_range[1] == bus_range[0])
+			printk(KERN_INFO "PCI bus %d", bus_range[0]);
+		else
+			printk(KERN_INFO "PCI buses %d..%d",
+			       bus_range[0], bus_range[1]);
+		printk(" controlled by %s", dev->type);
+		if (dev->n_addrs > 0)
+			printk(" at %lx", dev->addrs[0].address);
+		printk("\n");
+
+		hose = pcibios_alloc_controller();
+		if (!hose) {
+			printk("Can't allocate PCI controller structure for %s\n",
+				dev->full_name);
+			continue;
+		}
+		hose->arch_data = dev;
+		hose->first_busno = bus_range[0];
+		hose->last_busno = bus_range[1];
+
+		model = get_property(dev, "model", NULL);
+		if (model == NULL)
+			model = "<none>";
+		if (device_is_compatible(dev, "IBM,python")) {
+			setup_python(hose, dev);
+		} else if (is_mot
+			   || strncmp(model, "Motorola, Grackle", 17) == 0) {
+			setup_grackle(hose);
+		} else if (is_longtrail) {
+			void __iomem *p = ioremap(GG2_PCI_CONFIG_BASE, 0x80000);
+			hose->ops = &gg2_pci_ops;
+			hose->cfg_data = p;
+			gg2_pci_config_base = p;
+		} else if (is_pegasos == 1) {
+			setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc);
+		} else if (is_pegasos == 2) {
+			setup_peg2(hose, dev);
+		} else {
+			printk("No methods for %s (model %s), using RTAS\n",
+			       dev->full_name, model);
+			hose->ops = &rtas_pci_ops;
+		}
+
+		pci_process_bridge_OF_ranges(hose, dev, index == 0);
+
+		/* check the first bridge for a property that we can
+		   use to set pci_dram_offset */
+		dma = (unsigned int *)
+			get_property(dev, "ibm,dma-ranges", &len);
+		if (index == 0 && dma != NULL && len >= 6 * sizeof(*dma)) {
+			pci_dram_offset = dma[2] - dma[3];
+			printk("pci_dram_offset = %lx\n", pci_dram_offset);
+		}
+	}
+
+	/* Do not fixup interrupts from OF tree on pegasos */
+	if (is_pegasos == 0)
+		ppc_md.pcibios_fixup = chrp_pcibios_fixup;
+}
diff --git a/arch/powerpc/platforms/chrp/pegasos_eth.c b/arch/powerpc/platforms/chrp/pegasos_eth.c
new file mode 100644
index 000000000000..cad5bfa153b2
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/pegasos_eth.c
@@ -0,0 +1,101 @@
+/*
+ *  arch/ppc/platforms/chrp_pegasos_eth.c
+ *
+ *  Copyright (C) 2005 Sven Luther <sl@bplan-gmbh.de>
+ *  Thanks to :
+ *	Dale Farnsworth <dale@farnsworth.org>
+ *	Mark A. Greer <mgreer@mvista.com>
+ *	Nicolas DET <nd@bplan-gmbh.de>
+ *	Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ *  And anyone else who helped me on this.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/mv643xx.h>
+#include <linux/pci.h>
+
+/* Pegasos 2 specific Marvell MV 64361 gigabit ethernet port setup */
+static struct resource mv643xx_eth_shared_resources[] = {
+	[0] = {
+		.name	= "ethernet shared base",
+		.start	= 0xf1000000 + MV643XX_ETH_SHARED_REGS,
+		.end	= 0xf1000000 + MV643XX_ETH_SHARED_REGS +
+					MV643XX_ETH_SHARED_REGS_SIZE - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device mv643xx_eth_shared_device = {
+	.name		= MV643XX_ETH_SHARED_NAME,
+	.id		= 0,
+	.num_resources	= ARRAY_SIZE(mv643xx_eth_shared_resources),
+	.resource	= mv643xx_eth_shared_resources,
+};
+
+static struct resource mv643xx_eth0_resources[] = {
+	[0] = {
+		.name	= "eth0 irq",
+		.start	= 9,
+		.end	= 9,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct mv643xx_eth_platform_data eth0_pd;
+
+static struct platform_device eth0_device = {
+	.name		= MV643XX_ETH_NAME,
+	.id		= 0,
+	.num_resources	= ARRAY_SIZE(mv643xx_eth0_resources),
+	.resource	= mv643xx_eth0_resources,
+	.dev = {
+		.platform_data = &eth0_pd,
+	},
+};
+
+static struct resource mv643xx_eth1_resources[] = {
+	[0] = {
+		.name	= "eth1 irq",
+		.start	= 9,
+		.end	= 9,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct mv643xx_eth_platform_data eth1_pd;
+
+static struct platform_device eth1_device = {
+	.name		= MV643XX_ETH_NAME,
+	.id		= 1,
+	.num_resources	= ARRAY_SIZE(mv643xx_eth1_resources),
+	.resource	= mv643xx_eth1_resources,
+	.dev = {
+		.platform_data = &eth1_pd,
+	},
+};
+
+static struct platform_device *mv643xx_eth_pd_devs[] __initdata = {
+	&mv643xx_eth_shared_device,
+	&eth0_device,
+	&eth1_device,
+};
+
+
+int
+mv643xx_eth_add_pds(void)
+{
+	int ret = 0;
+	static struct pci_device_id pci_marvell_mv64360[] = {
+		{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64360) },
+		{ }
+	};
+
+	if (pci_dev_present(pci_marvell_mv64360)) {
+		ret = platform_add_devices(mv643xx_eth_pd_devs, ARRAY_SIZE(mv643xx_eth_pd_devs));
+	}
+	return ret;
+}
+device_initcall(mv643xx_eth_add_pds);
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
new file mode 100644
index 000000000000..5145990e6a01
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -0,0 +1,523 @@
+/*
+ *  arch/ppc/platforms/setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ *  Modified by Cort Dougan (cort@cs.nmt.edu)
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#include <linux/config.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/major.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/version.h>
+#include <linux/adb.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/console.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/initrd.h>
+#include <linux/module.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/gg2.h>
+#include <asm/pci-bridge.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/irq.h>
+#include <asm/hydra.h>
+#include <asm/sections.h>
+#include <asm/time.h>
+#include <asm/btext.h>
+#include <asm/i8259.h>
+#include <asm/mpic.h>
+#include <asm/rtas.h>
+#include <asm/xmon.h>
+
+void chrp_get_rtc_time(struct rtc_time *);
+int chrp_set_rtc_time(struct rtc_time *);
+void chrp_calibrate_decr(void);
+long chrp_time_init(void);
+
+void chrp_find_bridges(void);
+void chrp_event_scan(void);
+void rtas_indicator_progress(char *, unsigned short);
+void btext_progress(char *, unsigned short);
+
+int _chrp_type;
+EXPORT_SYMBOL(_chrp_type);
+
+struct mpic *chrp_mpic;
+
+/*
+ * XXX this should be in xmon.h, but putting it there means xmon.h
+ * has to include <linux/interrupt.h> (to get irqreturn_t), which
+ * causes all sorts of problems.  -- paulus
+ */
+extern irqreturn_t xmon_irq(int, void *, struct pt_regs *);
+
+extern unsigned long loops_per_jiffy;
+
+#ifdef CONFIG_SMP
+extern struct smp_ops_t chrp_smp_ops;
+#endif
+
+static const char *gg2_memtypes[4] = {
+	"FPM", "SDRAM", "EDO", "BEDO"
+};
+static const char *gg2_cachesizes[4] = {
+	"256 KB", "512 KB", "1 MB", "Reserved"
+};
+static const char *gg2_cachetypes[4] = {
+	"Asynchronous", "Reserved", "Flow-Through Synchronous",
+	"Pipelined Synchronous"
+};
+static const char *gg2_cachemodes[4] = {
+	"Disabled", "Write-Through", "Copy-Back", "Transparent Mode"
+};
+
+void chrp_show_cpuinfo(struct seq_file *m)
+{
+	int i, sdramen;
+	unsigned int t;
+	struct device_node *root;
+	const char *model = "";
+
+	root = find_path_device("/");
+	if (root)
+		model = get_property(root, "model", NULL);
+	seq_printf(m, "machine\t\t: CHRP %s\n", model);
+
+	/* longtrail (goldengate) stuff */
+	if (!strncmp(model, "IBM,LongTrail", 13)) {
+		/* VLSI VAS96011/12 `Golden Gate 2' */
+		/* Memory banks */
+		sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL)
+			   >>31) & 1;
+		for (i = 0; i < (sdramen ? 4 : 6); i++) {
+			t = in_le32(gg2_pci_config_base+
+						 GG2_PCI_DRAM_BANK0+
+						 i*4);
+			if (!(t & 1))
+				continue;
+			switch ((t>>8) & 0x1f) {
+			case 0x1f:
+				model = "4 MB";
+				break;
+			case 0x1e:
+				model = "8 MB";
+				break;
+			case 0x1c:
+				model = "16 MB";
+				break;
+			case 0x18:
+				model = "32 MB";
+				break;
+			case 0x10:
+				model = "64 MB";
+				break;
+			case 0x00:
+				model = "128 MB";
+				break;
+			default:
+				model = "Reserved";
+				break;
+			}
+			seq_printf(m, "memory bank %d\t: %s %s\n", i, model,
+				   gg2_memtypes[sdramen ? 1 : ((t>>1) & 3)]);
+		}
+		/* L2 cache */
+		t = in_le32(gg2_pci_config_base+GG2_PCI_CC_CTRL);
+		seq_printf(m, "board l2\t: %s %s (%s)\n",
+			   gg2_cachesizes[(t>>7) & 3],
+			   gg2_cachetypes[(t>>2) & 3],
+			   gg2_cachemodes[t & 3]);
+	}
+}
+
+/*
+ *  Fixes for the National Semiconductor PC78308VUL SuperI/O
+ *
+ *  Some versions of Open Firmware incorrectly initialize the IRQ settings
+ *  for keyboard and mouse
+ */
+static inline void __init sio_write(u8 val, u8 index)
+{
+	outb(index, 0x15c);
+	outb(val, 0x15d);
+}
+
+static inline u8 __init sio_read(u8 index)
+{
+	outb(index, 0x15c);
+	return inb(0x15d);
+}
+
+static void __init sio_fixup_irq(const char *name, u8 device, u8 level,
+				     u8 type)
+{
+	u8 level0, type0, active;
+
+	/* select logical device */
+	sio_write(device, 0x07);
+	active = sio_read(0x30);
+	level0 = sio_read(0x70);
+	type0 = sio_read(0x71);
+	if (level0 != level || type0 != type || !active) {
+		printk(KERN_WARNING "sio: %s irq level %d, type %d, %sactive: "
+		       "remapping to level %d, type %d, active\n",
+		       name, level0, type0, !active ? "in" : "", level, type);
+		sio_write(0x01, 0x30);
+		sio_write(level, 0x70);
+		sio_write(type, 0x71);
+	}
+}
+
+static void __init sio_init(void)
+{
+	struct device_node *root;
+
+	if ((root = find_path_device("/")) &&
+	    !strncmp(get_property(root, "model", NULL), "IBM,LongTrail", 13)) {
+		/* logical device 0 (KBC/Keyboard) */
+		sio_fixup_irq("keyboard", 0, 1, 2);
+		/* select logical device 1 (KBC/Mouse) */
+		sio_fixup_irq("mouse", 1, 12, 2);
+	}
+}
+
+
+static void __init pegasos_set_l2cr(void)
+{
+	struct device_node *np;
+
+	/* On Pegasos, enable the l2 cache if needed, as the OF forgets it */
+	if (_chrp_type != _CHRP_Pegasos)
+		return;
+
+	/* Enable L2 cache if needed */
+	np = find_type_devices("cpu");
+	if (np != NULL) {
+		unsigned int *l2cr = (unsigned int *)
+			get_property (np, "l2cr", NULL);
+		if (l2cr == NULL) {
+			printk ("Pegasos l2cr : no cpu l2cr property found\n");
+			return;
+		}
+		if (!((*l2cr) & 0x80000000)) {
+			printk ("Pegasos l2cr : L2 cache was not active, "
+				"activating\n");
+			_set_L2CR(0);
+			_set_L2CR((*l2cr) | 0x80000000);
+		}
+	}
+}
+
+void __init chrp_setup_arch(void)
+{
+	struct device_node *root = find_path_device ("/");
+	char *machine = NULL;
+	struct device_node *device;
+	unsigned int *p = NULL;
+
+	/* init to some ~sane value until calibrate_delay() runs */
+	loops_per_jiffy = 50000000/HZ;
+
+	if (root)
+		machine = get_property(root, "model", NULL);
+	if (machine && strncmp(machine, "Pegasos", 7) == 0) {
+		_chrp_type = _CHRP_Pegasos;
+	} else if (machine && strncmp(machine, "IBM", 3) == 0) {
+		_chrp_type = _CHRP_IBM;
+	} else if (machine && strncmp(machine, "MOT", 3) == 0) {
+		_chrp_type = _CHRP_Motorola;
+	} else {
+		/* Let's assume it is an IBM chrp if all else fails */
+		_chrp_type = _CHRP_IBM;
+	}
+	printk("chrp type = %x\n", _chrp_type);
+
+	rtas_initialize();
+	if (rtas_token("display-character") >= 0)
+		ppc_md.progress = rtas_progress;
+
+#ifdef CONFIG_BOOTX_TEXT
+	if (ppc_md.progress == NULL && boot_text_mapped)
+		ppc_md.progress = btext_progress;
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	/* this is fine for chrp */
+	initrd_below_start_ok = 1;
+
+	if (initrd_start)
+		ROOT_DEV = Root_RAM0;
+	else
+#endif
+		ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */
+
+	/* On pegasos, enable the L2 cache if not already done by OF */
+	pegasos_set_l2cr();
+
+	/* Lookup PCI host bridges */
+	chrp_find_bridges();
+
+	/*
+	 *  Temporary fixes for PCI devices.
+	 *  -- Geert
+	 */
+	hydra_init();		/* Mac I/O */
+
+	/*
+	 *  Fix the Super I/O configuration
+	 */
+	sio_init();
+
+	/* Get the event scan rate for the rtas so we know how
+	 * often it expects a heartbeat. -- Cort
+	 */
+	device = find_devices("rtas");
+	if (device)
+		p = (unsigned int *) get_property
+			(device, "rtas-event-scan-rate", NULL);
+	if (p && *p) {
+		ppc_md.heartbeat = chrp_event_scan;
+		ppc_md.heartbeat_reset = HZ / (*p * 30) - 1;
+		ppc_md.heartbeat_count = 1;
+		printk("RTAS Event Scan Rate: %u (%lu jiffies)\n",
+		       *p, ppc_md.heartbeat_reset);
+	}
+
+	pci_create_OF_bus_map();
+
+	/*
+	 * Print the banner, then scroll down so boot progress
+	 * can be printed.  -- Cort
+	 */
+	if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
+}
+
+void
+chrp_event_scan(void)
+{
+	unsigned char log[1024];
+	int ret = 0;
+
+	/* XXX: we should loop until the hardware says no more error logs -- Cort */
+	rtas_call(rtas_token("event-scan"), 4, 1, &ret, 0xffffffff, 0,
+		  __pa(log), 1024);
+	ppc_md.heartbeat_count = ppc_md.heartbeat_reset;
+}
+
+/*
+ * Finds the open-pic node and sets up the mpic driver.
+ */
+static void __init chrp_find_openpic(void)
+{
+	struct device_node *np, *root;
+	int len, i, j, irq_count;
+	int isu_size, idu_size;
+	unsigned int *iranges, *opprop = NULL;
+	int oplen = 0;
+	unsigned long opaddr;
+	int na = 1;
+	unsigned char init_senses[NR_IRQS - NUM_8259_INTERRUPTS];
+
+	np = find_type_devices("open-pic");
+	if (np == NULL)
+		return;
+	root = find_path_device("/");
+	if (root) {
+		opprop = (unsigned int *) get_property
+			(root, "platform-open-pic", &oplen);
+		na = prom_n_addr_cells(root);
+	}
+	if (opprop && oplen >= na * sizeof(unsigned int)) {
+		opaddr = opprop[na-1];	/* assume 32-bit */
+		oplen /= na * sizeof(unsigned int);
+	} else {
+		if (np->n_addrs == 0)
+			return;
+		opaddr = np->addrs[0].address;
+		oplen = 0;
+	}
+
+	printk(KERN_INFO "OpenPIC at %lx\n", opaddr);
+
+	irq_count = NR_IRQS - NUM_ISA_INTERRUPTS - 4; /* leave room for IPIs */
+	prom_get_irq_senses(init_senses, NUM_8259_INTERRUPTS, NR_IRQS - 4);
+
+	iranges = (unsigned int *) get_property(np, "interrupt-ranges", &len);
+	if (iranges == NULL)
+		len = 0;	/* non-distributed mpic */
+	else
+		len /= 2 * sizeof(unsigned int);
+
+	/*
+	 * The first pair of cells in interrupt-ranges refers to the
+	 * IDU; subsequent pairs refer to the ISUs.
+	 */
+	if (oplen < len) {
+		printk(KERN_ERR "Insufficient addresses for distributed"
+		       " OpenPIC (%d < %d)\n", np->n_addrs, len);
+		len = oplen;
+	}
+
+	isu_size = 0;
+	idu_size = 0;
+	if (len > 0 && iranges[1] != 0) {
+		printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
+		       iranges[0], iranges[0] + iranges[1] - 1);
+		idu_size = iranges[1];
+	}
+	if (len > 1)
+		isu_size = iranges[3];
+
+	chrp_mpic = mpic_alloc(opaddr, MPIC_PRIMARY,
+			       isu_size, NUM_ISA_INTERRUPTS, irq_count,
+			       NR_IRQS - 4, init_senses, irq_count,
+			       " MPIC    ");
+	if (chrp_mpic == NULL) {
+		printk(KERN_ERR "Failed to allocate MPIC structure\n");
+		return;
+	}
+
+	j = na - 1;
+	for (i = 1; i < len; ++i) {
+		iranges += 2;
+		j += na;
+		printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x\n",
+		       iranges[0], iranges[0] + iranges[1] - 1,
+		       opprop[j]);
+		mpic_assign_isu(chrp_mpic, i - 1, opprop[j]);
+	}
+
+	mpic_init(chrp_mpic);
+	mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL);
+}
+
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
+static struct irqaction xmon_irqaction = {
+	.handler = xmon_irq,
+	.mask = CPU_MASK_NONE,
+	.name = "XMON break",
+};
+#endif
+
+void __init chrp_init_IRQ(void)
+{
+	struct device_node *np;
+	unsigned long chrp_int_ack = 0;
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
+	struct device_node *kbd;
+#endif
+
+	for (np = find_devices("pci"); np != NULL; np = np->next) {
+		unsigned int *addrp = (unsigned int *)
+			get_property(np, "8259-interrupt-acknowledge", NULL);
+
+		if (addrp == NULL)
+			continue;
+		chrp_int_ack = addrp[prom_n_addr_cells(np)-1];
+		break;
+	}
+	if (np == NULL)
+		printk(KERN_ERR "Cannot find PCI interrupt acknowledge address\n");
+
+	chrp_find_openpic();
+
+	i8259_init(chrp_int_ack, 0);
+
+	if (_chrp_type == _CHRP_Pegasos)
+		ppc_md.get_irq        = i8259_irq;
+	else
+		ppc_md.get_irq        = mpic_get_irq;
+
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
+	/* see if there is a keyboard in the device tree
+	   with a parent of type "adb" */
+	for (kbd = find_devices("keyboard"); kbd; kbd = kbd->next)
+		if (kbd->parent && kbd->parent->type
+		    && strcmp(kbd->parent->type, "adb") == 0)
+			break;
+	if (kbd)
+		setup_irq(HYDRA_INT_ADB_NMI, &xmon_irqaction);
+#endif
+}
+
+void __init
+chrp_init2(void)
+{
+	request_region(0x20,0x20,"pic1");
+	request_region(0xa0,0x20,"pic2");
+	request_region(0x00,0x20,"dma1");
+	request_region(0x40,0x20,"timer");
+	request_region(0x80,0x10,"dma page reg");
+	request_region(0xc0,0x20,"dma2");
+
+	if (ppc_md.progress)
+		ppc_md.progress("  Have fun!    ", 0x7777);
+}
+
+void __init chrp_init(void)
+{
+	ISA_DMA_THRESHOLD = ~0L;
+	DMA_MODE_READ = 0x44;
+	DMA_MODE_WRITE = 0x48;
+	isa_io_base = CHRP_ISA_IO_BASE;		/* default value */
+	ppc_do_canonicalize_irqs = 1;
+
+	/* Assume we have an 8259... */
+	__irq_offset_value = NUM_ISA_INTERRUPTS;
+
+	ppc_md.setup_arch     = chrp_setup_arch;
+	ppc_md.show_cpuinfo   = chrp_show_cpuinfo;
+
+	ppc_md.init_IRQ       = chrp_init_IRQ;
+	ppc_md.init           = chrp_init2;
+
+	ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
+
+	ppc_md.restart        = rtas_restart;
+	ppc_md.power_off      = rtas_power_off;
+	ppc_md.halt           = rtas_halt;
+
+	ppc_md.time_init      = chrp_time_init;
+	ppc_md.set_rtc_time   = chrp_set_rtc_time;
+	ppc_md.get_rtc_time   = chrp_get_rtc_time;
+	ppc_md.calibrate_decr = chrp_calibrate_decr;
+
+#ifdef CONFIG_SMP
+	smp_ops = &chrp_smp_ops;
+#endif /* CONFIG_SMP */
+}
+
+#ifdef CONFIG_BOOTX_TEXT
+void
+btext_progress(char *s, unsigned short hex)
+{
+	btext_drawstring(s);
+	btext_drawstring("\n");
+}
+#endif /* CONFIG_BOOTX_TEXT */
diff --git a/arch/powerpc/platforms/chrp/smp.c b/arch/powerpc/platforms/chrp/smp.c
new file mode 100644
index 000000000000..bf68282670dd
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/smp.c
@@ -0,0 +1,94 @@
+/*
+ * Smp support for CHRP machines.
+ *
+ * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great
+ * deal of code from the sparc and intel versions.
+ *
+ * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+
+#include <asm/ptrace.h>
+#include <asm/atomic.h>
+#include <asm/irq.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/sections.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/smp.h>
+#include <asm/residual.h>
+#include <asm/time.h>
+#include <asm/open_pic.h>
+#include <asm/machdep.h>
+
+extern unsigned long smp_chrp_cpu_nr;
+
+static int __init smp_chrp_probe(void)
+{
+	if (smp_chrp_cpu_nr > 1)
+		openpic_request_IPIs();
+
+	return smp_chrp_cpu_nr;
+}
+
+static void __devinit smp_chrp_kick_cpu(int nr)
+{
+	*(unsigned long *)KERNELBASE = nr;
+	asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
+}
+
+static void __devinit smp_chrp_setup_cpu(int cpu_nr)
+{
+	if (OpenPIC_Addr)
+		do_openpic_setup_cpu();
+}
+
+static DEFINE_SPINLOCK(timebase_lock);
+static unsigned int timebase_upper = 0, timebase_lower = 0;
+
+void __devinit smp_chrp_give_timebase(void)
+{
+	spin_lock(&timebase_lock);
+	rtas_call(rtas_token("freeze-time-base"), 0, 1, NULL);
+	timebase_upper = get_tbu();
+	timebase_lower = get_tbl();
+	spin_unlock(&timebase_lock);
+
+	while (timebase_upper || timebase_lower)
+		barrier();
+	rtas_call(rtas_token("thaw-time-base"), 0, 1, NULL);
+}
+
+void __devinit smp_chrp_take_timebase(void)
+{
+	while (!(timebase_upper || timebase_lower))
+		barrier();
+	spin_lock(&timebase_lock);
+	set_tb(timebase_upper, timebase_lower);
+	timebase_upper = 0;
+	timebase_lower = 0;
+	spin_unlock(&timebase_lock);
+	printk("CPU %i taken timebase\n", smp_processor_id());
+}
+
+/* CHRP with openpic */
+struct smp_ops_t chrp_smp_ops = {
+	.message_pass = smp_openpic_message_pass,
+	.probe = smp_chrp_probe,
+	.kick_cpu = smp_chrp_kick_cpu,
+	.setup_cpu = smp_chrp_setup_cpu,
+	.give_timebase = smp_chrp_give_timebase,
+	.take_timebase = smp_chrp_take_timebase,
+};
diff --git a/arch/powerpc/platforms/chrp/time.c b/arch/powerpc/platforms/chrp/time.c
new file mode 100644
index 000000000000..9e53535ddb82
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/time.c
@@ -0,0 +1,188 @@
+/*
+ *  arch/ppc/platforms/chrp_time.c
+ *
+ *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
+ *
+ * Adapted for PowerPC (PReP) by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu).
+ * Copied and modified from arch/i386/kernel/time.c
+ *
+ */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/timex.h>
+#include <linux/kernel_stat.h>
+#include <linux/mc146818rtc.h>
+#include <linux/init.h>
+#include <linux/bcd.h>
+
+#include <asm/io.h>
+#include <asm/nvram.h>
+#include <asm/prom.h>
+#include <asm/sections.h>
+#include <asm/time.h>
+
+extern spinlock_t rtc_lock;
+
+static int nvram_as1 = NVRAM_AS1;
+static int nvram_as0 = NVRAM_AS0;
+static int nvram_data = NVRAM_DATA;
+
+long __init chrp_time_init(void)
+{
+	struct device_node *rtcs;
+	int base;
+
+	rtcs = find_compatible_devices("rtc", "pnpPNP,b00");
+	if (rtcs == NULL)
+		rtcs = find_compatible_devices("rtc", "ds1385-rtc");
+	if (rtcs == NULL || rtcs->addrs == NULL)
+		return 0;
+	base = rtcs->addrs[0].address;
+	nvram_as1 = 0;
+	nvram_as0 = base;
+	nvram_data = base + 1;
+
+	return 0;
+}
+
+int chrp_cmos_clock_read(int addr)
+{
+	if (nvram_as1 != 0)
+		outb(addr>>8, nvram_as1);
+	outb(addr, nvram_as0);
+	return (inb(nvram_data));
+}
+
+void chrp_cmos_clock_write(unsigned long val, int addr)
+{
+	if (nvram_as1 != 0)
+		outb(addr>>8, nvram_as1);
+	outb(addr, nvram_as0);
+	outb(val, nvram_data);
+	return;
+}
+
+/*
+ * Set the hardware clock. -- Cort
+ */
+int chrp_set_rtc_time(struct rtc_time *tmarg)
+{
+	unsigned char save_control, save_freq_select;
+	struct rtc_time tm = *tmarg;
+
+	spin_lock(&rtc_lock);
+
+	save_control = chrp_cmos_clock_read(RTC_CONTROL); /* tell the clock it's being set */
+
+	chrp_cmos_clock_write((save_control|RTC_SET), RTC_CONTROL);
+
+	save_freq_select = chrp_cmos_clock_read(RTC_FREQ_SELECT); /* stop and reset prescaler */
+
+	chrp_cmos_clock_write((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
+
+        tm.tm_year -= 1900;
+	if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+		BIN_TO_BCD(tm.tm_sec);
+		BIN_TO_BCD(tm.tm_min);
+		BIN_TO_BCD(tm.tm_hour);
+		BIN_TO_BCD(tm.tm_mon);
+		BIN_TO_BCD(tm.tm_mday);
+		BIN_TO_BCD(tm.tm_year);
+	}
+	chrp_cmos_clock_write(tm.tm_sec,RTC_SECONDS);
+	chrp_cmos_clock_write(tm.tm_min,RTC_MINUTES);
+	chrp_cmos_clock_write(tm.tm_hour,RTC_HOURS);
+	chrp_cmos_clock_write(tm.tm_mon,RTC_MONTH);
+	chrp_cmos_clock_write(tm.tm_mday,RTC_DAY_OF_MONTH);
+	chrp_cmos_clock_write(tm.tm_year,RTC_YEAR);
+
+	/* The following flags have to be released exactly in this order,
+	 * otherwise the DS12887 (popular MC146818A clone with integrated
+	 * battery and quartz) will not reset the oscillator and will not
+	 * update precisely 500 ms later. You won't find this mentioned in
+	 * the Dallas Semiconductor data sheets, but who believes data
+	 * sheets anyway ...                           -- Markus Kuhn
+	 */
+	chrp_cmos_clock_write(save_control, RTC_CONTROL);
+	chrp_cmos_clock_write(save_freq_select, RTC_FREQ_SELECT);
+
+	spin_unlock(&rtc_lock);
+	return 0;
+}
+
+void chrp_get_rtc_time(struct rtc_time *tm)
+{
+	unsigned int year, mon, day, hour, min, sec;
+	int uip, i;
+
+	/* The Linux interpretation of the CMOS clock register contents:
+	 * When the Update-In-Progress (UIP) flag goes from 1 to 0, the
+	 * RTC registers show the second which has precisely just started.
+	 * Let's hope other operating systems interpret the RTC the same way.
+	 */
+
+	/* Since the UIP flag is set for about 2.2 ms and the clock
+	 * is typically written with a precision of 1 jiffy, trying
+	 * to obtain a precision better than a few milliseconds is
+	 * an illusion. Only consistency is interesting, this also
+	 * allows to use the routine for /dev/rtc without a potential
+	 * 1 second kernel busy loop triggered by any reader of /dev/rtc.
+	 */
+
+	for ( i = 0; i<1000000; i++) {
+		uip = chrp_cmos_clock_read(RTC_FREQ_SELECT);
+		sec = chrp_cmos_clock_read(RTC_SECONDS);
+		min = chrp_cmos_clock_read(RTC_MINUTES);
+		hour = chrp_cmos_clock_read(RTC_HOURS);
+		day = chrp_cmos_clock_read(RTC_DAY_OF_MONTH);
+		mon = chrp_cmos_clock_read(RTC_MONTH);
+		year = chrp_cmos_clock_read(RTC_YEAR);
+		uip |= chrp_cmos_clock_read(RTC_FREQ_SELECT);
+		if ((uip & RTC_UIP)==0) break;
+	}
+
+	if (!(chrp_cmos_clock_read(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+		BCD_TO_BIN(sec);
+		BCD_TO_BIN(min);
+		BCD_TO_BIN(hour);
+		BCD_TO_BIN(day);
+		BCD_TO_BIN(mon);
+		BCD_TO_BIN(year);
+	}
+	if ((year += 1900) < 1970)
+		year += 100;
+	tm->tm_sec = sec;
+	tm->tm_min = min;
+	tm->tm_hour = hour;
+	tm->tm_mday = day;
+	tm->tm_mon = mon;
+	tm->tm_year = year;
+}
+
+
+void __init chrp_calibrate_decr(void)
+{
+	struct device_node *cpu;
+	unsigned int freq, *fp;
+
+	/*
+	 * The cpu node should have a timebase-frequency property
+	 * to tell us the rate at which the decrementer counts.
+	 */
+	freq = 16666000;		/* hardcoded default */
+	cpu = find_type_devices("cpu");
+	if (cpu != 0) {
+		fp = (unsigned int *)
+			get_property(cpu, "timebase-frequency", NULL);
+		if (fp != 0)
+			freq = *fp;
+	}
+	ppc_tb_freq = freq;
+}
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index 0eca17df239e..0037a8c8c81f 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -71,10 +71,6 @@ static u32 level_mask[4];
 
 static DEFINE_SPINLOCK(pmac_pic_lock);
 
-/* XXX here for now, should move to arch/powerpc/kernel/irq.c */
-int ppc_do_canonicalize_irqs;
-EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
-
 #define GATWICK_IRQ_POOL_SIZE        10
 static struct interrupt_info gatwick_int_pool[GATWICK_IRQ_POOL_SIZE];