arch/powerpc/platforms/pasemi/setup.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2006-2007 PA Semi, Inc
  *
  * Authors: Kip Walker, PA Semi
  *	    Olof Johansson, PA Semi
  *
  * Maintained by: Olof Johansson <olof@lixom.net>
  *
  * Based on arch/powerpc/platforms/maple/setup.c
  */

 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/console.h>
 #include <linux/export.h>
 #include <linux/pci.h>
 #include <linux/of_platform.h>
 #include <linux/gfp.h>

 #include <asm/prom.h>
 #include <asm/iommu.h>
 #include <asm/machdep.h>
 #include <asm/i8259.h>
 #include <asm/mpic.h>
 #include <asm/smp.h>
 #include <asm/time.h>
 #include <asm/mmu.h>
 #include <asm/debug.h>

 #include <pcmcia/ss.h>
 #include <pcmcia/cistpl.h>
 #include <pcmcia/ds.h>

 #include "pasemi.h"

 /* SDC reset register, must be pre-mapped at reset time */
 static void __iomem *reset_reg;

 /* Various error status registers, must be pre-mapped at MCE time */

 #define MAX_MCE_REGS	32
 struct mce_regs {
 	char *name;
 	void __iomem *addr;
 };

 static struct mce_regs mce_regs[MAX_MCE_REGS];
 static int num_mce_regs;
 static int nmi_virq = 0;


 static void __noreturn pas_restart(char *cmd)
 {
 	/* Need to put others cpu in hold loop so they're not sleeping */
 	smp_send_stop();
 	udelay(10000);
 	printk("Restarting...\n");
 	while (1)
 		out_le32(reset_reg, 0x6000000);
 }

 #ifdef CONFIG_PPC_PASEMI_NEMO
 void pas_shutdown(void)
 {
 	/* Set the PLD bit that makes the SB600 think the power button is being pressed */
 	void __iomem *pld_map = ioremap(0xf5000000,4096);
 	while (1)
 		out_8(pld_map+7,0x01);
 }

 /* RTC platform device structure as is not in device tree */
 static struct resource rtc_resource[] = {{
 	.name = "rtc",
 	.start = 0x70,
 	.end = 0x71,
 	.flags = IORESOURCE_IO,
 }, {
 	.name = "rtc",
 	.start = 8,
 	.end = 8,
 	.flags = IORESOURCE_IRQ,
 }};

 static inline void nemo_init_rtc(void)
 {
 	platform_device_register_simple("rtc_cmos", -1, rtc_resource, 2);
 }

 #else

 static inline void nemo_init_rtc(void)
 {
 }
 #endif

 #ifdef CONFIG_SMP
 static arch_spinlock_t timebase_lock;
 static unsigned long timebase;

 static void pas_give_timebase(void)
 {
 	unsigned long flags;

 	local_irq_save(flags);
 	hard_irq_disable();
 	arch_spin_lock(&timebase_lock);
 	mtspr(SPRN_TBCTL, TBCTL_FREEZE);
 	isync();
 	timebase = get_tb();
 	arch_spin_unlock(&timebase_lock);

 	while (timebase)
 		barrier();
 	mtspr(SPRN_TBCTL, TBCTL_RESTART);
 	local_irq_restore(flags);
 }

 static void pas_take_timebase(void)
 {
 	while (!timebase)
 		smp_rmb();

 	arch_spin_lock(&timebase_lock);
 	set_tb(timebase >> 32, timebase & 0xffffffff);
 	timebase = 0;
 	arch_spin_unlock(&timebase_lock);
 }

 static struct smp_ops_t pas_smp_ops = {
 	.probe		= smp_mpic_probe,
 	.message_pass	= smp_mpic_message_pass,
 	.kick_cpu	= smp_generic_kick_cpu,
 	.setup_cpu	= smp_mpic_setup_cpu,
 	.give_timebase	= pas_give_timebase,
 	.take_timebase	= pas_take_timebase,
 };
 #endif /* CONFIG_SMP */

 static void __init pas_setup_arch(void)
 {
 #ifdef CONFIG_SMP
 	/* Setup SMP callback */
 	smp_ops = &pas_smp_ops;
 #endif
 	/* Lookup PCI hosts */
 	pas_pci_init();

 	/* Remap SDC register for doing reset */
 	/* XXXOJN This should maybe come out of the device tree */
 	reset_reg = ioremap(0xfc101100, 4);
 }

 static int __init pas_setup_mce_regs(void)
 {
 	struct pci_dev *dev;
 	int reg;

 	/* Remap various SoC status registers for use by the MCE handler */

 	reg = 0;

 	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, NULL);
 	while (dev && reg < MAX_MCE_REGS) {
 		mce_regs[reg].name = kasprintf(GFP_KERNEL,
 						"mc%d_mcdebug_errsta", reg);
 		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x730);
 		dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, dev);
 		reg++;
 	}

 	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
 	if (dev && reg+4 < MAX_MCE_REGS) {
 		mce_regs[reg].name = "iobdbg_IntStatus1";
 		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x438);
 		reg++;
 		mce_regs[reg].name = "iobdbg_IOCTbusIntDbgReg";
 		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x454);
 		reg++;
 		mce_regs[reg].name = "iobiom_IntStatus";
 		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc10);
 		reg++;
 		mce_regs[reg].name = "iobiom_IntDbgReg";
 		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc1c);
 		reg++;
 	}

 	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa009, NULL);
 	if (dev && reg+2 < MAX_MCE_REGS) {
 		mce_regs[reg].name = "l2csts_IntStatus";
 		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x200);
 		reg++;
 		mce_regs[reg].name = "l2csts_Cnt";
 		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x214);
 		reg++;
 	}

 	num_mce_regs = reg;

 	return 0;
 }
 machine_device_initcall(pasemi, pas_setup_mce_regs);

 #ifdef CONFIG_PPC_PASEMI_NEMO
 static void sb600_8259_cascade(struct irq_desc *desc)
 {
 	struct irq_chip *chip = irq_desc_get_chip(desc);
 	unsigned int cascade_irq = i8259_irq();

 	if (cascade_irq)
 		generic_handle_irq(cascade_irq);

 	chip->irq_eoi(&desc->irq_data);
 }

 static void nemo_init_IRQ(struct mpic *mpic)
 {
 	struct device_node *np;
 	int gpio_virq;
 	/* Connect the SB600's legacy i8259 controller */
 	np = of_find_node_by_path("/pxp@0,e0000000");
 	i8259_init(np, 0);
 	of_node_put(np);

 	gpio_virq = irq_create_mapping(NULL, 3);
 	irq_set_irq_type(gpio_virq, IRQ_TYPE_LEVEL_HIGH);
 	irq_set_chained_handler(gpio_virq, sb600_8259_cascade);
 	mpic_unmask_irq(irq_get_irq_data(gpio_virq));

 	irq_set_default_host(mpic->irqhost);
 }

 #else

 static inline void nemo_init_IRQ(struct mpic *mpic)
 {
 }
 #endif

 static __init void pas_init_IRQ(void)
 {
 	struct device_node *np;
 	struct device_node *root, *mpic_node;
 	unsigned long openpic_addr;
 	const unsigned int *opprop;
 	int naddr, opplen;
 	int mpic_flags;
 	const unsigned int *nmiprop;
 	struct mpic *mpic;

 	mpic_node = NULL;

 	for_each_node_by_type(np, "interrupt-controller")
 		if (of_device_is_compatible(np, "open-pic")) {
 			mpic_node = np;
 			break;
 		}
 	if (!mpic_node)
 		for_each_node_by_type(np, "open-pic") {
 			mpic_node = np;
 			break;
 		}
 	if (!mpic_node) {
 		pr_err("Failed to locate the MPIC interrupt controller\n");
 		return;
 	}

 	/* Find address list in /platform-open-pic */
 	root = of_find_node_by_path("/");
 	naddr = of_n_addr_cells(root);
 	opprop = of_get_property(root, "platform-open-pic", &opplen);
 	if (!opprop) {
 		pr_err("No platform-open-pic property.\n");
 		of_node_put(root);
 		return;
 	}
 	openpic_addr = of_read_number(opprop, naddr);
 	pr_debug("OpenPIC addr: %lx\n", openpic_addr);

 	mpic_flags = MPIC_LARGE_VECTORS | MPIC_NO_BIAS | MPIC_NO_RESET;

 	nmiprop = of_get_property(mpic_node, "nmi-source", NULL);
 	if (nmiprop)
 		mpic_flags |= MPIC_ENABLE_MCK;

 	mpic = mpic_alloc(mpic_node, openpic_addr,
 			  mpic_flags, 0, 0, "PASEMI-OPIC");
 	BUG_ON(!mpic);

 	mpic_assign_isu(mpic, 0, mpic->paddr + 0x10000);
 	mpic_init(mpic);
 	/* The NMI/MCK source needs to be prio 15 */
 	if (nmiprop) {
 		nmi_virq = irq_create_mapping(NULL, *nmiprop);
 		mpic_irq_set_priority(nmi_virq, 15);
 		irq_set_irq_type(nmi_virq, IRQ_TYPE_EDGE_RISING);
 		mpic_unmask_irq(irq_get_irq_data(nmi_virq));
 	}

 	nemo_init_IRQ(mpic);

 	of_node_put(mpic_node);
 	of_node_put(root);
 }

 static void __init pas_progress(char *s, unsigned short hex)
 {
 	printk("[%04x] : %s\n", hex, s ? s : "");
 }


 static int pas_machine_check_handler(struct pt_regs *regs)
 {
 	int cpu = smp_processor_id();
 	unsigned long srr0, srr1, dsisr;
 	int dump_slb = 0;
 	int i;

 	srr0 = regs->nip;
 	srr1 = regs->msr;

 	if (nmi_virq && mpic_get_mcirq() == nmi_virq) {
 		pr_err("NMI delivered\n");
 		debugger(regs);
 		mpic_end_irq(irq_get_irq_data(nmi_virq));
 		goto out;
 	}

 	dsisr = mfspr(SPRN_DSISR);
 	pr_err("Machine Check on CPU %d\n", cpu);
 	pr_err("SRR0  0x%016lx SRR1 0x%016lx\n", srr0, srr1);
 	pr_err("DSISR 0x%016lx DAR  0x%016lx\n", dsisr, regs->dar);
 	pr_err("BER   0x%016lx MER  0x%016lx\n", mfspr(SPRN_PA6T_BER),
 		mfspr(SPRN_PA6T_MER));
 	pr_err("IER   0x%016lx DER  0x%016lx\n", mfspr(SPRN_PA6T_IER),
 		mfspr(SPRN_PA6T_DER));
 	pr_err("Cause:\n");

 	if (srr1 & 0x200000)
 		pr_err("Signalled by SDC\n");

 	if (srr1 & 0x100000) {
 		pr_err("Load/Store detected error:\n");
 		if (dsisr & 0x8000)
 			pr_err("D-cache ECC double-bit error or bus error\n");
 		if (dsisr & 0x4000)
 			pr_err("LSU snoop response error\n");
 		if (dsisr & 0x2000) {
 			pr_err("MMU SLB multi-hit or invalid B field\n");
 			dump_slb = 1;
 		}
 		if (dsisr & 0x1000)
 			pr_err("Recoverable Duptags\n");
 		if (dsisr & 0x800)
 			pr_err("Recoverable D-cache parity error count overflow\n");
 		if (dsisr & 0x400)
 			pr_err("TLB parity error count overflow\n");
 	}

 	if (srr1 & 0x80000)
 		pr_err("Bus Error\n");

 	if (srr1 & 0x40000) {
 		pr_err("I-side SLB multiple hit\n");
 		dump_slb = 1;
 	}

 	if (srr1 & 0x20000)
 		pr_err("I-cache parity error hit\n");

 	if (num_mce_regs == 0)
 		pr_err("No MCE registers mapped yet, can't dump\n");
 	else
 		pr_err("SoC debug registers:\n");

 	for (i = 0; i < num_mce_regs; i++)
 		pr_err("%s: 0x%08x\n", mce_regs[i].name,
 			in_le32(mce_regs[i].addr));

 	if (dump_slb) {
 		unsigned long e, v;
 		int i;

 		pr_err("slb contents:\n");
 		for (i = 0; i < mmu_slb_size; i++) {
 			asm volatile("slbmfee  %0,%1" : "=r" (e) : "r" (i));
 			asm volatile("slbmfev  %0,%1" : "=r" (v) : "r" (i));
 			pr_err("%02d %016lx %016lx\n", i, e, v);
 		}
 	}

 out:
 	/* SRR1[62] is from MSR[62] if recoverable, so pass that back */
 	return !!(srr1 & 0x2);
 }

 static const struct of_device_id pasemi_bus_ids[] = {
 	/* Unfortunately needed for legacy firmwares */
 	{ .type = "localbus", },
 	{ .type = "sdc", },
 	/* These are the proper entries, which newer firmware uses */
 	{ .compatible = "pasemi,localbus", },
 	{ .compatible = "pasemi,sdc", },
 	{},
 };

 static int __init pasemi_publish_devices(void)
 {
 	/* Publish OF platform devices for SDC and other non-PCI devices */
 	of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);

 	nemo_init_rtc();

 	return 0;
 }
 machine_device_initcall(pasemi, pasemi_publish_devices);


 /*
  * Called very early, MMU is off, device-tree isn't unflattened
  */
 static int __init pas_probe(void)
 {
 	if (!of_machine_is_compatible("PA6T-1682M") &&
 	    !of_machine_is_compatible("pasemi,pwrficient"))
 		return 0;

 #ifdef CONFIG_PPC_PASEMI_NEMO
 	/*
 	 * Check for the Nemo motherboard here, if we are running on one
 	 * change the machine definition to fit
 	 */
 	if (of_machine_is_compatible("pasemi,nemo")) {
 		pm_power_off		= pas_shutdown;
 		ppc_md.name		= "A-EON Amigaone X1000";
 	}
 #endif

 	iommu_init_early_pasemi();

 	return 1;
 }

 define_machine(pasemi) {
 	.name			= "PA Semi PWRficient",
 	.probe			= pas_probe,
 	.setup_arch		= pas_setup_arch,
 	.init_IRQ		= pas_init_IRQ,
 	.get_irq		= mpic_get_irq,
 	.restart		= pas_restart,
 	.get_boot_time		= pas_get_boot_time,
 	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= pas_progress,
 	.machine_check_exception = pas_machine_check_handler,
 };
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Copyright (C) 2006-2007 PA Semi, Inc
	*
	* Authors: Kip Walker, PA Semi
	* Olof Johansson, PA Semi
	*
	* Maintained by: Olof Johansson <olof@lixom.net>
	*
	* Based on arch/powerpc/platforms/maple/setup.c
	*/

	#include <linux/errno.h>
	#include <linux/kernel.h>
	#include <linux/delay.h>
	#include <linux/console.h>
	#include <linux/export.h>
	#include <linux/pci.h>
	#include <linux/of_platform.h>
	#include <linux/gfp.h>

	#include <asm/prom.h>
	#include <asm/iommu.h>
	#include <asm/machdep.h>
	#include <asm/i8259.h>
	#include <asm/mpic.h>
	#include <asm/smp.h>
	#include <asm/time.h>
	#include <asm/mmu.h>
	#include <asm/debug.h>

	#include <pcmcia/ss.h>
	#include <pcmcia/cistpl.h>
	#include <pcmcia/ds.h>

	#include "pasemi.h"

	/* SDC reset register, must be pre-mapped at reset time */
	static void __iomem *reset_reg;

	/* Various error status registers, must be pre-mapped at MCE time */

	#define MAX_MCE_REGS 32
	struct mce_regs {
	char *name;
	void __iomem *addr;
	};

	static struct mce_regs mce_regs[MAX_MCE_REGS];
	static int num_mce_regs;
	static int nmi_virq = 0;


	static void __noreturn pas_restart(char *cmd)
	{
	/* Need to put others cpu in hold loop so they're not sleeping */
	smp_send_stop();
	udelay(10000);
	printk("Restarting...\n");
	while (1)
	out_le32(reset_reg, 0x6000000);
	}

	#ifdef CONFIG_PPC_PASEMI_NEMO
	void pas_shutdown(void)
	{
	/* Set the PLD bit that makes the SB600 think the power button is being pressed */
	void __iomem *pld_map = ioremap(0xf5000000,4096);
	while (1)
	out_8(pld_map+7,0x01);
	}

	/* RTC platform device structure as is not in device tree */
	static struct resource rtc_resource[] = {{
	.name = "rtc",
	.start = 0x70,
	.end = 0x71,
	.flags = IORESOURCE_IO,
	}, {
	.name = "rtc",
	.start = 8,
	.end = 8,
	.flags = IORESOURCE_IRQ,
	}};

	static inline void nemo_init_rtc(void)
	{
	platform_device_register_simple("rtc_cmos", -1, rtc_resource, 2);
	}

	#else

	static inline void nemo_init_rtc(void)
	{
	}
	#endif

	#ifdef CONFIG_SMP
	static arch_spinlock_t timebase_lock;
	static unsigned long timebase;

	static void pas_give_timebase(void)
	{
	unsigned long flags;

	local_irq_save(flags);
	hard_irq_disable();
	arch_spin_lock(&timebase_lock);
	mtspr(SPRN_TBCTL, TBCTL_FREEZE);
	isync();
	timebase = get_tb();
	arch_spin_unlock(&timebase_lock);

	while (timebase)
	barrier();
	mtspr(SPRN_TBCTL, TBCTL_RESTART);
	local_irq_restore(flags);
	}

	static void pas_take_timebase(void)
	{
	while (!timebase)
	smp_rmb();

	arch_spin_lock(&timebase_lock);
	set_tb(timebase >> 32, timebase & 0xffffffff);
	timebase = 0;
	arch_spin_unlock(&timebase_lock);
	}

	static struct smp_ops_t pas_smp_ops = {
	.probe = smp_mpic_probe,
	.message_pass = smp_mpic_message_pass,
	.kick_cpu = smp_generic_kick_cpu,
	.setup_cpu = smp_mpic_setup_cpu,
	.give_timebase = pas_give_timebase,
	.take_timebase = pas_take_timebase,
	};
	#endif /* CONFIG_SMP */

	static void __init pas_setup_arch(void)
	{
	#ifdef CONFIG_SMP
	/* Setup SMP callback */
	smp_ops = &pas_smp_ops;
	#endif
	/* Lookup PCI hosts */
	pas_pci_init();

	/* Remap SDC register for doing reset */
	/* XXXOJN This should maybe come out of the device tree */
	reset_reg = ioremap(0xfc101100, 4);
	}

	static int __init pas_setup_mce_regs(void)
	{
	struct pci_dev *dev;
	int reg;

	/* Remap various SoC status registers for use by the MCE handler */

	reg = 0;

	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, NULL);
	while (dev && reg < MAX_MCE_REGS) {
	mce_regs[reg].name = kasprintf(GFP_KERNEL,
	"mc%d_mcdebug_errsta", reg);
	mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x730);
	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, dev);
	reg++;
	}

	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
	if (dev && reg+4 < MAX_MCE_REGS) {
	mce_regs[reg].name = "iobdbg_IntStatus1";
	mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x438);
	reg++;
	mce_regs[reg].name = "iobdbg_IOCTbusIntDbgReg";
	mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x454);
	reg++;
	mce_regs[reg].name = "iobiom_IntStatus";
	mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc10);
	reg++;
	mce_regs[reg].name = "iobiom_IntDbgReg";
	mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc1c);
	reg++;
	}

	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa009, NULL);
	if (dev && reg+2 < MAX_MCE_REGS) {
	mce_regs[reg].name = "l2csts_IntStatus";
	mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x200);
	reg++;
	mce_regs[reg].name = "l2csts_Cnt";
	mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x214);
	reg++;
	}

	num_mce_regs = reg;

	return 0;
	}
	machine_device_initcall(pasemi, pas_setup_mce_regs);

	#ifdef CONFIG_PPC_PASEMI_NEMO
	static void sb600_8259_cascade(struct irq_desc *desc)
	{
	struct irq_chip *chip = irq_desc_get_chip(desc);
	unsigned int cascade_irq = i8259_irq();

	if (cascade_irq)
	generic_handle_irq(cascade_irq);

	chip->irq_eoi(&desc->irq_data);
	}

	static void nemo_init_IRQ(struct mpic *mpic)
	{
	struct device_node *np;
	int gpio_virq;
	/* Connect the SB600's legacy i8259 controller */
	np = of_find_node_by_path("/pxp@0,e0000000");
	i8259_init(np, 0);
	of_node_put(np);

	gpio_virq = irq_create_mapping(NULL, 3);
	irq_set_irq_type(gpio_virq, IRQ_TYPE_LEVEL_HIGH);
	irq_set_chained_handler(gpio_virq, sb600_8259_cascade);
	mpic_unmask_irq(irq_get_irq_data(gpio_virq));

	irq_set_default_host(mpic->irqhost);
	}

	#else

	static inline void nemo_init_IRQ(struct mpic *mpic)
	{
	}
	#endif

	static __init void pas_init_IRQ(void)
	{
	struct device_node *np;
	struct device_node root, mpic_node;
	unsigned long openpic_addr;
	const unsigned int *opprop;
	int naddr, opplen;
	int mpic_flags;
	const unsigned int *nmiprop;
	struct mpic *mpic;

	mpic_node = NULL;

	for_each_node_by_type(np, "interrupt-controller")
	if (of_device_is_compatible(np, "open-pic")) {
	mpic_node = np;
	break;
	}
	if (!mpic_node)
	for_each_node_by_type(np, "open-pic") {
	mpic_node = np;
	break;
	}
	if (!mpic_node) {
	pr_err("Failed to locate the MPIC interrupt controller\n");
	return;
	}

	/* Find address list in /platform-open-pic */
	root = of_find_node_by_path("/");
	naddr = of_n_addr_cells(root);
	opprop = of_get_property(root, "platform-open-pic", &opplen);
	if (!opprop) {
	pr_err("No platform-open-pic property.\n");
	of_node_put(root);
	return;
	}
	openpic_addr = of_read_number(opprop, naddr);
	pr_debug("OpenPIC addr: %lx\n", openpic_addr);

	mpic_flags = MPIC_LARGE_VECTORS \| MPIC_NO_BIAS \| MPIC_NO_RESET;

	nmiprop = of_get_property(mpic_node, "nmi-source", NULL);
	if (nmiprop)
	mpic_flags \|= MPIC_ENABLE_MCK;

	mpic = mpic_alloc(mpic_node, openpic_addr,
	mpic_flags, 0, 0, "PASEMI-OPIC");
	BUG_ON(!mpic);

	mpic_assign_isu(mpic, 0, mpic->paddr + 0x10000);
	mpic_init(mpic);
	/* The NMI/MCK source needs to be prio 15 */
	if (nmiprop) {
	nmi_virq = irq_create_mapping(NULL, *nmiprop);
	mpic_irq_set_priority(nmi_virq, 15);
	irq_set_irq_type(nmi_virq, IRQ_TYPE_EDGE_RISING);
	mpic_unmask_irq(irq_get_irq_data(nmi_virq));
	}

	nemo_init_IRQ(mpic);

	of_node_put(mpic_node);
	of_node_put(root);
	}

	static void __init pas_progress(char *s, unsigned short hex)
	{
	printk("[%04x] : %s\n", hex, s ? s : "");
	}


	static int pas_machine_check_handler(struct pt_regs *regs)
	{
	int cpu = smp_processor_id();
	unsigned long srr0, srr1, dsisr;
	int dump_slb = 0;
	int i;

	srr0 = regs->nip;
	srr1 = regs->msr;

	if (nmi_virq && mpic_get_mcirq() == nmi_virq) {
	pr_err("NMI delivered\n");
	debugger(regs);
	mpic_end_irq(irq_get_irq_data(nmi_virq));
	goto out;
	}

	dsisr = mfspr(SPRN_DSISR);
	pr_err("Machine Check on CPU %d\n", cpu);
	pr_err("SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1);
	pr_err("DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar);
	pr_err("BER 0x%016lx MER 0x%016lx\n", mfspr(SPRN_PA6T_BER),
	mfspr(SPRN_PA6T_MER));
	pr_err("IER 0x%016lx DER 0x%016lx\n", mfspr(SPRN_PA6T_IER),
	mfspr(SPRN_PA6T_DER));
	pr_err("Cause:\n");

	if (srr1 & 0x200000)
	pr_err("Signalled by SDC\n");

	if (srr1 & 0x100000) {
	pr_err("Load/Store detected error:\n");
	if (dsisr & 0x8000)
	pr_err("D-cache ECC double-bit error or bus error\n");
	if (dsisr & 0x4000)
	pr_err("LSU snoop response error\n");
	if (dsisr & 0x2000) {
	pr_err("MMU SLB multi-hit or invalid B field\n");
	dump_slb = 1;
	}
	if (dsisr & 0x1000)
	pr_err("Recoverable Duptags\n");
	if (dsisr & 0x800)
	pr_err("Recoverable D-cache parity error count overflow\n");
	if (dsisr & 0x400)
	pr_err("TLB parity error count overflow\n");
	}

	if (srr1 & 0x80000)
	pr_err("Bus Error\n");

	if (srr1 & 0x40000) {
	pr_err("I-side SLB multiple hit\n");
	dump_slb = 1;
	}

	if (srr1 & 0x20000)
	pr_err("I-cache parity error hit\n");

	if (num_mce_regs == 0)
	pr_err("No MCE registers mapped yet, can't dump\n");
	else
	pr_err("SoC debug registers:\n");

	for (i = 0; i < num_mce_regs; i++)
	pr_err("%s: 0x%08x\n", mce_regs[i].name,
	in_le32(mce_regs[i].addr));

	if (dump_slb) {
	unsigned long e, v;
	int i;

	pr_err("slb contents:\n");
	for (i = 0; i < mmu_slb_size; i++) {
	asm volatile("slbmfee %0,%1" : "=r" (e) : "r" (i));
	asm volatile("slbmfev %0,%1" : "=r" (v) : "r" (i));
	pr_err("%02d %016lx %016lx\n", i, e, v);
	}
	}

	out:
	/* SRR1[62] is from MSR[62] if recoverable, so pass that back */
	return !!(srr1 & 0x2);
	}

	static const struct of_device_id pasemi_bus_ids[] = {
	/* Unfortunately needed for legacy firmwares */
	{ .type = "localbus", },
	{ .type = "sdc", },
	/* These are the proper entries, which newer firmware uses */
	{ .compatible = "pasemi,localbus", },
	{ .compatible = "pasemi,sdc", },
	{},
	};

	static int __init pasemi_publish_devices(void)
	{
	/* Publish OF platform devices for SDC and other non-PCI devices */
	of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);

	nemo_init_rtc();

	return 0;
	}
	machine_device_initcall(pasemi, pasemi_publish_devices);


	/*
	* Called very early, MMU is off, device-tree isn't unflattened
	*/
	static int __init pas_probe(void)
	{
	if (!of_machine_is_compatible("PA6T-1682M") &&
	!of_machine_is_compatible("pasemi,pwrficient"))
	return 0;

	#ifdef CONFIG_PPC_PASEMI_NEMO
	/*
	* Check for the Nemo motherboard here, if we are running on one
	* change the machine definition to fit
	*/
	if (of_machine_is_compatible("pasemi,nemo")) {
	pm_power_off = pas_shutdown;
	ppc_md.name = "A-EON Amigaone X1000";
	}
	#endif

	iommu_init_early_pasemi();

	return 1;
	}

	define_machine(pasemi) {
	.name = "PA Semi PWRficient",
	.probe = pas_probe,
	.setup_arch = pas_setup_arch,
	.init_IRQ = pas_init_IRQ,
	.get_irq = mpic_get_irq,
	.restart = pas_restart,
	.get_boot_time = pas_get_boot_time,
	.calibrate_decr = generic_calibrate_decr,
	.progress = pas_progress,
	.machine_check_exception = pas_machine_check_handler,
	};