[net-next-2.6.git] / arch / powerpc / kernel / setup-common.c

/*
 * Common boot and setup code for both 32-bit and 64-bit.
 * Extracted from arch/powerpc/kernel/setup_64.c.
 *
 * Copyright (C) 2001 PPC64 Team, IBM Corp
 *
 *      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.
 */

#undef DEBUG

#include <linux/module.h>
#include <linux/string.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/reboot.h>
#include <linux/delay.h>
#include <linux/initrd.h>
#include <linux/platform_device.h>
#include <linux/seq_file.h>
#include <linux/ioport.h>
#include <linux/console.h>
#include <linux/screen_info.h>
#include <linux/root_dev.h>
#include <linux/notifier.h>
#include <linux/cpu.h>
#include <linux/unistd.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <linux/debugfs.h>
#include <linux/percpu.h>
#include <linux/memblock.h>
#include <linux/of_platform.h>
#include <asm/io.h>
#include <asm/paca.h>
#include <asm/prom.h>
#include <asm/processor.h>
#include <asm/vdso_datapage.h>
#include <asm/pgtable.h>
#include <asm/smp.h>
#include <asm/elf.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include <asm/cputable.h>
#include <asm/sections.h>
#include <asm/firmware.h>
#include <asm/btext.h>
#include <asm/nvram.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/rtas.h>
#include <asm/iommu.h>
#include <asm/serial.h>
#include <asm/cache.h>
#include <asm/page.h>
#include <asm/mmu.h>
#include <asm/xmon.h>
#include <asm/cputhreads.h>
#include <mm/mmu_decl.h>

#include "setup.h"

#ifdef DEBUG
#include <asm/udbg.h>
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif

/* The main machine-dep calls structure
 */
struct machdep_calls ppc_md;
EXPORT_SYMBOL(ppc_md);
struct machdep_calls *machine_id;
EXPORT_SYMBOL(machine_id);

unsigned long klimit = (unsigned long) _end;

char cmd_line[COMMAND_LINE_SIZE];

/*
 * This still seems to be needed... -- paulus
 */ 
struct screen_info screen_info = {
	.orig_x = 0,
	.orig_y = 25,
	.orig_video_cols = 80,
	.orig_video_lines = 25,
	.orig_video_isVGA = 1,
	.orig_video_points = 16
};

#ifdef __DO_IRQ_CANON
/* XXX should go elsewhere eventually */
int ppc_do_canonicalize_irqs;
EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
#endif

/* also used by kexec */
void machine_shutdown(void)
{
	if (ppc_md.machine_shutdown)
		ppc_md.machine_shutdown();
}

void machine_restart(char *cmd)
{
	machine_shutdown();
	if (ppc_md.restart)
		ppc_md.restart(cmd);
#ifdef CONFIG_SMP
	smp_send_stop();
#endif
	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	local_irq_disable();
	while (1) ;
}

void machine_power_off(void)
{
	machine_shutdown();
	if (ppc_md.power_off)
		ppc_md.power_off();
#ifdef CONFIG_SMP
	smp_send_stop();
#endif
	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	local_irq_disable();
	while (1) ;
}
/* Used by the G5 thermal driver */
EXPORT_SYMBOL_GPL(machine_power_off);

void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL_GPL(pm_power_off);

void machine_halt(void)
{
	machine_shutdown();
	if (ppc_md.halt)
		ppc_md.halt();
#ifdef CONFIG_SMP
	smp_send_stop();
#endif
	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	local_irq_disable();
	while (1) ;
}


#ifdef CONFIG_TAU
extern u32 cpu_temp(unsigned long cpu);
extern u32 cpu_temp_both(unsigned long cpu);
#endif /* CONFIG_TAU */

#ifdef CONFIG_SMP
DEFINE_PER_CPU(unsigned int, cpu_pvr);
#endif

static void show_cpuinfo_summary(struct seq_file *m)
{
	struct device_node *root;
	const char *model = NULL;
#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
	unsigned long bogosum = 0;
	int i;
	for_each_online_cpu(i)
		bogosum += loops_per_jiffy;
	seq_printf(m, "total bogomips\t: %lu.%02lu\n",
		   bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
#endif /* CONFIG_SMP && CONFIG_PPC32 */
	seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
	if (ppc_md.name)
		seq_printf(m, "platform\t: %s\n", ppc_md.name);
	root = of_find_node_by_path("/");
	if (root)
		model = of_get_property(root, "model", NULL);
	if (model)
		seq_printf(m, "model\t\t: %s\n", model);
	of_node_put(root);

	if (ppc_md.show_cpuinfo != NULL)
		ppc_md.show_cpuinfo(m);

#ifdef CONFIG_PPC32
	/* Display the amount of memory */
	seq_printf(m, "Memory\t\t: %d MB\n",
		   (unsigned int)(total_memory / (1024 * 1024)));
#endif
}

static int show_cpuinfo(struct seq_file *m, void *v)
{
	unsigned long cpu_id = (unsigned long)v - 1;
	unsigned int pvr;
	unsigned short maj;
	unsigned short min;

	/* We only show online cpus: disable preempt (overzealous, I
	 * knew) to prevent cpu going down. */
	preempt_disable();
	if (!cpu_online(cpu_id)) {
		preempt_enable();
		return 0;
	}

#ifdef CONFIG_SMP
	pvr = per_cpu(cpu_pvr, cpu_id);
#else
	pvr = mfspr(SPRN_PVR);
#endif
	maj = (pvr >> 8) & 0xFF;
	min = pvr & 0xFF;

	seq_printf(m, "processor\t: %lu\n", cpu_id);
	seq_printf(m, "cpu\t\t: ");

	if (cur_cpu_spec->pvr_mask)
		seq_printf(m, "%s", cur_cpu_spec->cpu_name);
	else
		seq_printf(m, "unknown (%08x)", pvr);

#ifdef CONFIG_ALTIVEC
	if (cpu_has_feature(CPU_FTR_ALTIVEC))
		seq_printf(m, ", altivec supported");
#endif /* CONFIG_ALTIVEC */

	seq_printf(m, "\n");

#ifdef CONFIG_TAU
	if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
#ifdef CONFIG_TAU_AVERAGE
		/* more straightforward, but potentially misleading */
		seq_printf(m,  "temperature \t: %u C (uncalibrated)\n",
			   cpu_temp(cpu_id));
#else
		/* show the actual temp sensor range */
		u32 temp;
		temp = cpu_temp_both(cpu_id);
		seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
			   temp & 0xff, temp >> 16);
#endif
	}
#endif /* CONFIG_TAU */

	/*
	 * Assume here that all clock rates are the same in a
	 * smp system.  -- Cort
	 */
	if (ppc_proc_freq)
		seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
			   ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);

	if (ppc_md.show_percpuinfo != NULL)
		ppc_md.show_percpuinfo(m, cpu_id);

	/* If we are a Freescale core do a simple check so
	 * we dont have to keep adding cases in the future */
	if (PVR_VER(pvr) & 0x8000) {
		switch (PVR_VER(pvr)) {
		case 0x8000:	/* 7441/7450/7451, Voyager */
		case 0x8001:	/* 7445/7455, Apollo 6 */
		case 0x8002:	/* 7447/7457, Apollo 7 */
		case 0x8003:	/* 7447A, Apollo 7 PM */
		case 0x8004:	/* 7448, Apollo 8 */
		case 0x800c:	/* 7410, Nitro */
			maj = ((pvr >> 8) & 0xF);
			min = PVR_MIN(pvr);
			break;
		default:	/* e500/book-e */
			maj = PVR_MAJ(pvr);
			min = PVR_MIN(pvr);
			break;
		}
	} else {
		switch (PVR_VER(pvr)) {
			case 0x0020:	/* 403 family */
				maj = PVR_MAJ(pvr) + 1;
				min = PVR_MIN(pvr);
				break;
			case 0x1008:	/* 740P/750P ?? */
				maj = ((pvr >> 8) & 0xFF) - 1;
				min = pvr & 0xFF;
				break;
			default:
				maj = (pvr >> 8) & 0xFF;
				min = pvr & 0xFF;
				break;
		}
	}

	seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
		   maj, min, PVR_VER(pvr), PVR_REV(pvr));

#ifdef CONFIG_PPC32
	seq_printf(m, "bogomips\t: %lu.%02lu\n",
		   loops_per_jiffy / (500000/HZ),
		   (loops_per_jiffy / (5000/HZ)) % 100);
#endif

#ifdef CONFIG_SMP
	seq_printf(m, "\n");
#endif

	preempt_enable();

	/* If this is the last cpu, print the summary */
	if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids)
		show_cpuinfo_summary(m);

	return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	if (*pos == 0)	/* just in case, cpu 0 is not the first */
		*pos = cpumask_first(cpu_online_mask);
	else
		*pos = cpumask_next(*pos - 1, cpu_online_mask);
	if ((*pos) < nr_cpu_ids)
		return (void *)(unsigned long)(*pos + 1);
	return NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
	(*pos)++;
	return c_start(m, pos);
}

static void c_stop(struct seq_file *m, void *v)
{
}

const struct seq_operations cpuinfo_op = {
	.start =c_start,
	.next =	c_next,
	.stop =	c_stop,
	.show =	show_cpuinfo,
};

void __init check_for_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
	DBG(" -> check_for_initrd()  initrd_start=0x%lx  initrd_end=0x%lx\n",
	    initrd_start, initrd_end);

	/* If we were passed an initrd, set the ROOT_DEV properly if the values
	 * look sensible. If not, clear initrd reference.
	 */
	if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) &&
	    initrd_end > initrd_start)
		ROOT_DEV = Root_RAM0;
	else
		initrd_start = initrd_end = 0;

	if (initrd_start)
		printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);

	DBG(" <- check_for_initrd()\n");
#endif /* CONFIG_BLK_DEV_INITRD */
}

#ifdef CONFIG_SMP

int threads_per_core, threads_shift;
cpumask_t threads_core_mask;

static void __init cpu_init_thread_core_maps(int tpc)
{
	int i;

	threads_per_core = tpc;
	threads_core_mask = CPU_MASK_NONE;

	/* This implementation only supports power of 2 number of threads
	 * for simplicity and performance
	 */
	threads_shift = ilog2(tpc);
	BUG_ON(tpc != (1 << threads_shift));

	for (i = 0; i < tpc; i++)
		cpu_set(i, threads_core_mask);

	printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n",
	       tpc, tpc > 1 ? "s" : "");
	printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift);
}


/**
 * setup_cpu_maps - initialize the following cpu maps:
 *                  cpu_possible_mask
 *                  cpu_present_mask
 *
 * Having the possible map set up early allows us to restrict allocations
 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
 *
 * We do not initialize the online map here; cpus set their own bits in
 * cpu_online_mask as they come up.
 *
 * This function is valid only for Open Firmware systems.  finish_device_tree
 * must be called before using this.
 *
 * While we're here, we may as well set the "physical" cpu ids in the paca.
 *
 * NOTE: This must match the parsing done in early_init_dt_scan_cpus.
 */
void __init smp_setup_cpu_maps(void)
{
	struct device_node *dn = NULL;
	int cpu = 0;
	int nthreads = 1;

	DBG("smp_setup_cpu_maps()\n");

	while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
		const int *intserv;
		int j, len;

		DBG("  * %s...\n", dn->full_name);

		intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",
				&len);
		if (intserv) {
			nthreads = len / sizeof(int);
			DBG("    ibm,ppc-interrupt-server#s -> %d threads\n",
			    nthreads);
		} else {
			DBG("    no ibm,ppc-interrupt-server#s -> 1 thread\n");
			intserv = of_get_property(dn, "reg", NULL);
			if (!intserv)
				intserv = &cpu;	/* assume logical == phys */
		}

		for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
			DBG("    thread %d -> cpu %d (hard id %d)\n",
			    j, cpu, intserv[j]);
			set_cpu_present(cpu, true);
			set_hard_smp_processor_id(cpu, intserv[j]);
			set_cpu_possible(cpu, true);
			cpu++;
		}
	}

	/* If no SMT supported, nthreads is forced to 1 */
	if (!cpu_has_feature(CPU_FTR_SMT)) {
		DBG("  SMT disabled ! nthreads forced to 1\n");
		nthreads = 1;
	}

#ifdef CONFIG_PPC64
	/*
	 * On pSeries LPAR, we need to know how many cpus
	 * could possibly be added to this partition.
	 */
	if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) &&
	    (dn = of_find_node_by_path("/rtas"))) {
		int num_addr_cell, num_size_cell, maxcpus;
		const unsigned int *ireg;

		num_addr_cell = of_n_addr_cells(dn);
		num_size_cell = of_n_size_cells(dn);

		ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL);

		if (!ireg)
			goto out;

		maxcpus = ireg[num_addr_cell + num_size_cell];

		/* Double maxcpus for processors which have SMT capability */
		if (cpu_has_feature(CPU_FTR_SMT))
			maxcpus *= nthreads;

		if (maxcpus > NR_CPUS) {
			printk(KERN_WARNING
			       "Partition configured for %d cpus, "
			       "operating system maximum is %d.\n",
			       maxcpus, NR_CPUS);
			maxcpus = NR_CPUS;
		} else
			printk(KERN_INFO "Partition configured for %d cpus.\n",
			       maxcpus);

		for (cpu = 0; cpu < maxcpus; cpu++)
			set_cpu_possible(cpu, true);
	out:
		of_node_put(dn);
	}
	vdso_data->processorCount = num_present_cpus();
#endif /* CONFIG_PPC64 */

        /* Initialize CPU <=> thread mapping/
	 *
	 * WARNING: We assume that the number of threads is the same for
	 * every CPU in the system. If that is not the case, then some code
	 * here will have to be reworked
	 */
	cpu_init_thread_core_maps(nthreads);

	free_unused_pacas();
}
#endif /* CONFIG_SMP */

#ifdef CONFIG_PCSPKR_PLATFORM
static __init int add_pcspkr(void)
{
	struct device_node *np;
	struct platform_device *pd;
	int ret;

	np = of_find_compatible_node(NULL, NULL, "pnpPNP,100");
	of_node_put(np);
	if (!np)
		return -ENODEV;

	pd = platform_device_alloc("pcspkr", -1);
	if (!pd)
		return -ENOMEM;

	ret = platform_device_add(pd);
	if (ret)
		platform_device_put(pd);

	return ret;
}
device_initcall(add_pcspkr);
#endif	/* CONFIG_PCSPKR_PLATFORM */

void probe_machine(void)
{
	extern struct machdep_calls __machine_desc_start;
	extern struct machdep_calls __machine_desc_end;

	/*
	 * Iterate all ppc_md structures until we find the proper
	 * one for the current machine type
	 */
	DBG("Probing machine type ...\n");

	for (machine_id = &__machine_desc_start;
	     machine_id < &__machine_desc_end;
	     machine_id++) {
		DBG("  %s ...", machine_id->name);
		memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
		if (ppc_md.probe()) {
			DBG(" match !\n");
			break;
		}
		DBG("\n");
	}
	/* What can we do if we didn't find ? */
	if (machine_id >= &__machine_desc_end) {
		DBG("No suitable machine found !\n");
		for (;;);
	}

	printk(KERN_INFO "Using %s machine description\n", ppc_md.name);
}

/* Match a class of boards, not a specific device configuration. */
int check_legacy_ioport(unsigned long base_port)
{
	struct device_node *parent, *np = NULL;
	int ret = -ENODEV;

	switch(base_port) {
	case I8042_DATA_REG:
		if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303")))
			np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03");
		if (np) {
			parent = of_get_parent(np);
			of_node_put(np);
			np = parent;
			break;
		}
		np = of_find_node_by_type(NULL, "8042");
		/* Pegasos has no device_type on its 8042 node, look for the
		 * name instead */
		if (!np)
			np = of_find_node_by_name(NULL, "8042");
		break;
	case FDC_BASE: /* FDC1 */
		np = of_find_node_by_type(NULL, "fdc");
		break;
#ifdef CONFIG_PPC_PREP
	case _PIDXR:
	case _PNPWRP:
	case PNPBIOS_BASE:
		/* implement me */
#endif
	default:
		/* ipmi is supposed to fail here */
		break;
	}
	if (!np)
		return ret;
	parent = of_get_parent(np);
	if (parent) {
		if (strcmp(parent->type, "isa") == 0)
			ret = 0;
		of_node_put(parent);
	}
	of_node_put(np);
	return ret;
}
EXPORT_SYMBOL(check_legacy_ioport);

static int ppc_panic_event(struct notifier_block *this,
                             unsigned long event, void *ptr)
{
	ppc_md.panic(ptr);  /* May not return */
	return NOTIFY_DONE;
}

static struct notifier_block ppc_panic_block = {
	.notifier_call = ppc_panic_event,
	.priority = INT_MIN /* may not return; must be done last */
};

void __init setup_panic(void)
{
	atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
}

#ifdef CONFIG_CHECK_CACHE_COHERENCY
/*
 * For platforms that have configurable cache-coherency.  This function
 * checks that the cache coherency setting of the kernel matches the setting
 * left by the firmware, as indicated in the device tree.  Since a mismatch
 * will eventually result in DMA failures, we print * and error and call
 * BUG() in that case.
 */

#ifdef CONFIG_NOT_COHERENT_CACHE
#define KERNEL_COHERENCY	0
#else
#define KERNEL_COHERENCY	1
#endif

static int __init check_cache_coherency(void)
{
	struct device_node *np;
	const void *prop;
	int devtree_coherency;

	np = of_find_node_by_path("/");
	prop = of_get_property(np, "coherency-off", NULL);
	of_node_put(np);

	devtree_coherency = prop ? 0 : 1;

	if (devtree_coherency != KERNEL_COHERENCY) {
		printk(KERN_ERR
			"kernel coherency:%s != device tree_coherency:%s\n",
			KERNEL_COHERENCY ? "on" : "off",
			devtree_coherency ? "on" : "off");
		BUG();
	}

	return 0;
}

late_initcall(check_cache_coherency);
#endif /* CONFIG_CHECK_CACHE_COHERENCY */

#ifdef CONFIG_DEBUG_FS
struct dentry *powerpc_debugfs_root;
EXPORT_SYMBOL(powerpc_debugfs_root);

static int powerpc_debugfs_init(void)
{
	powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL);

	return powerpc_debugfs_root == NULL;
}
arch_initcall(powerpc_debugfs_init);
#endif

static int ppc_dflt_bus_notify(struct notifier_block *nb,
				unsigned long action, void *data)
{
	struct device *dev = data;

	/* We are only intereted in device addition */
	if (action != BUS_NOTIFY_ADD_DEVICE)
		return 0;

	set_dma_ops(dev, &dma_direct_ops);

	return NOTIFY_DONE;
}

static struct notifier_block ppc_dflt_plat_bus_notifier = {
	.notifier_call = ppc_dflt_bus_notify,
	.priority = INT_MAX,
};

static struct notifier_block ppc_dflt_of_bus_notifier = {
	.notifier_call = ppc_dflt_bus_notify,
	.priority = INT_MAX,
};

static int __init setup_bus_notifier(void)
{
	bus_register_notifier(&platform_bus_type, &ppc_dflt_plat_bus_notifier);
	bus_register_notifier(&of_platform_bus_type, &ppc_dflt_of_bus_notifier);

	return 0;
}

arch_initcall(setup_bus_notifier);
Commit	Line	Data
03501dab PM	1	/*
	2	* Common boot and setup code for both 32-bit and 64-bit.
	3	* Extracted from arch/powerpc/kernel/setup_64.c.
	4	*
	5	* Copyright (C) 2001 PPC64 Team, IBM Corp
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version
	10	* 2 of the License, or (at your option) any later version.
	11	*/
e8222502 BH	12
	13	#undef DEBUG
	14
03501dab PM	15	#include <linux/module.h>
	16	#include <linux/string.h>
	17	#include <linux/sched.h>
	18	#include <linux/init.h>
	19	#include <linux/kernel.h>
	20	#include <linux/reboot.h>
	21	#include <linux/delay.h>
	22	#include <linux/initrd.h>
e5c6c8e4	23	#include <linux/platform_device.h>
03501dab PM	24	#include <linux/seq_file.h>
	25	#include <linux/ioport.h>
	26	#include <linux/console.h>
894673ee	27	#include <linux/screen_info.h>
03501dab PM	28	#include <linux/root_dev.h>
	29	#include <linux/notifier.h>
	30	#include <linux/cpu.h>
	31	#include <linux/unistd.h>
	32	#include <linux/serial.h>
	33	#include <linux/serial_8250.h>
94a3807c	34	#include <linux/debugfs.h>
8d089085	35	#include <linux/percpu.h>
95f72d1e	36	#include <linux/memblock.h>
d746286c	37	#include <linux/of_platform.h>
03501dab	38	#include <asm/io.h>
1426d5a3	39	#include <asm/paca.h>
03501dab PM	40	#include <asm/prom.h>
03501dab PM	41	#include <asm/processor.h>
a7f290da	42	#include <asm/vdso_datapage.h>
03501dab	43	#include <asm/pgtable.h>
03501dab PM	44	#include <asm/smp.h>
	45	#include <asm/elf.h>
	46	#include <asm/machdep.h>
	47	#include <asm/time.h>
	48	#include <asm/cputable.h>
	49	#include <asm/sections.h>
e8222502	50	#include <asm/firmware.h>
03501dab PM	51	#include <asm/btext.h>
	52	#include <asm/nvram.h>
	53	#include <asm/setup.h>
	54	#include <asm/system.h>
	55	#include <asm/rtas.h>
	56	#include <asm/iommu.h>
	57	#include <asm/serial.h>
	58	#include <asm/cache.h>
	59	#include <asm/page.h>
	60	#include <asm/mmu.h>
fca5dcd4	61	#include <asm/xmon.h>
8d089085	62	#include <asm/cputhreads.h>
f465df81	63	#include <mm/mmu_decl.h>
03501dab	64
66ba135c SR	65	#include "setup.h"
66ba135c SR	66
03501dab	67	#ifdef DEBUG
f9e4ec57	68	#include <asm/udbg.h>
03501dab PM	69	#define DBG(fmt...) udbg_printf(fmt)
	70	#else
	71	#define DBG(fmt...)
	72	#endif
	73
e8222502 BH	74	/* The main machine-dep calls structure
	75	*/
	76	struct machdep_calls ppc_md;
	77	EXPORT_SYMBOL(ppc_md);
	78	struct machdep_calls *machine_id;
	79	EXPORT_SYMBOL(machine_id);
799d6046	80
49b09853 PM	81	unsigned long klimit = (unsigned long) _end;
49b09853 PM	82
19a8d97d SR	83	char cmd_line[COMMAND_LINE_SIZE];
19a8d97d SR	84
03501dab PM	85	/*
	86	* This still seems to be needed... -- paulus
	87	*/
	88	struct screen_info screen_info = {
	89	.orig_x = 0,
	90	.orig_y = 25,
	91	.orig_video_cols = 80,
	92	.orig_video_lines = 25,
	93	.orig_video_isVGA = 1,
	94	.orig_video_points = 16
	95	};
	96
	97	#ifdef __DO_IRQ_CANON
	98	/* XXX should go elsewhere eventually */
	99	int ppc_do_canonicalize_irqs;
	100	EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
	101	#endif
	102
	103	/* also used by kexec */
	104	void machine_shutdown(void)
	105	{
3d1229d6 ME	106	if (ppc_md.machine_shutdown)
3d1229d6 ME	107	ppc_md.machine_shutdown();
03501dab PM	108	}
	109
	110	void machine_restart(char *cmd)
	111	{
	112	machine_shutdown();
b8e383d5 KG	113	if (ppc_md.restart)
b8e383d5 KG	114	ppc_md.restart(cmd);
03501dab PM	115	#ifdef CONFIG_SMP
	116	smp_send_stop();
	117	#endif
	118	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	119	local_irq_disable();
	120	while (1) ;
	121	}
	122
	123	void machine_power_off(void)
	124	{
	125	machine_shutdown();
b8e383d5 KG	126	if (ppc_md.power_off)
b8e383d5 KG	127	ppc_md.power_off();
03501dab PM	128	#ifdef CONFIG_SMP
	129	smp_send_stop();
	130	#endif
	131	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	132	local_irq_disable();
	133	while (1) ;
	134	}
	135	/* Used by the G5 thermal driver */
	136	EXPORT_SYMBOL_GPL(machine_power_off);
	137
	138	void (*pm_power_off)(void) = machine_power_off;
	139	EXPORT_SYMBOL_GPL(pm_power_off);
	140
	141	void machine_halt(void)
	142	{
	143	machine_shutdown();
b8e383d5 KG	144	if (ppc_md.halt)
b8e383d5 KG	145	ppc_md.halt();
03501dab PM	146	#ifdef CONFIG_SMP
	147	smp_send_stop();
	148	#endif
	149	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	150	local_irq_disable();
	151	while (1) ;
	152	}
	153
	154
	155	#ifdef CONFIG_TAU
	156	extern u32 cpu_temp(unsigned long cpu);
	157	extern u32 cpu_temp_both(unsigned long cpu);
	158	#endif /* CONFIG_TAU */
	159
	160	#ifdef CONFIG_SMP
6b7487fc	161	DEFINE_PER_CPU(unsigned int, cpu_pvr);
03501dab PM	162	#endif
03501dab PM	163
2c2df038 AB	164	static void show_cpuinfo_summary(struct seq_file *m)
	165	{
	166	struct device_node *root;
	167	const char *model = NULL;
	168	#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
	169	unsigned long bogosum = 0;
	170	int i;
	171	for_each_online_cpu(i)
	172	bogosum += loops_per_jiffy;
	173	seq_printf(m, "total bogomips\t: %lu.%02lu\n",
	174	bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
	175	#endif /* CONFIG_SMP && CONFIG_PPC32 */
	176	seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
	177	if (ppc_md.name)
	178	seq_printf(m, "platform\t: %s\n", ppc_md.name);
	179	root = of_find_node_by_path("/");
	180	if (root)
	181	model = of_get_property(root, "model", NULL);
	182	if (model)
	183	seq_printf(m, "model\t\t: %s\n", model);
	184	of_node_put(root);
	185
	186	if (ppc_md.show_cpuinfo != NULL)
	187	ppc_md.show_cpuinfo(m);
	188
	189	#ifdef CONFIG_PPC32
	190	/* Display the amount of memory */
	191	seq_printf(m, "Memory\t\t: %d MB\n",
	192	(unsigned int)(total_memory / (1024 * 1024)));
	193	#endif
	194	}
	195
03501dab PM	196	static int show_cpuinfo(struct seq_file m, void v)
	197	{
	198	unsigned long cpu_id = (unsigned long)v - 1;
	199	unsigned int pvr;
	200	unsigned short maj;
	201	unsigned short min;
	202
03501dab PM	203	/* We only show online cpus: disable preempt (overzealous, I
	204	* knew) to prevent cpu going down. */
	205	preempt_disable();
	206	if (!cpu_online(cpu_id)) {
	207	preempt_enable();
	208	return 0;
	209	}
	210
	211	#ifdef CONFIG_SMP
6b7487fc	212	pvr = per_cpu(cpu_pvr, cpu_id);
03501dab PM	213	#else
	214	pvr = mfspr(SPRN_PVR);
	215	#endif
	216	maj = (pvr >> 8) & 0xFF;
	217	min = pvr & 0xFF;
	218
	219	seq_printf(m, "processor\t: %lu\n", cpu_id);
	220	seq_printf(m, "cpu\t\t: ");
	221
	222	if (cur_cpu_spec->pvr_mask)
	223	seq_printf(m, "%s", cur_cpu_spec->cpu_name);
	224	else
	225	seq_printf(m, "unknown (%08x)", pvr);
	226
	227	#ifdef CONFIG_ALTIVEC
	228	if (cpu_has_feature(CPU_FTR_ALTIVEC))
	229	seq_printf(m, ", altivec supported");
	230	#endif /* CONFIG_ALTIVEC */
	231
	232	seq_printf(m, "\n");
	233
	234	#ifdef CONFIG_TAU
	235	if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
	236	#ifdef CONFIG_TAU_AVERAGE
	237	/* more straightforward, but potentially misleading */
	238	seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
bccfd588	239	cpu_temp(cpu_id));
03501dab PM	240	#else
	241	/* show the actual temp sensor range */
	242	u32 temp;
bccfd588	243	temp = cpu_temp_both(cpu_id);
03501dab PM	244	seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
	245	temp & 0xff, temp >> 16);
	246	#endif
	247	}
	248	#endif /* CONFIG_TAU */
	249
	250	/*
	251	* Assume here that all clock rates are the same in a
	252	* smp system. -- Cort
	253	*/
	254	if (ppc_proc_freq)
	255	seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
	256	ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
	257
	258	if (ppc_md.show_percpuinfo != NULL)
	259	ppc_md.show_percpuinfo(m, cpu_id);
	260
	261	/* If we are a Freescale core do a simple check so
	262	* we dont have to keep adding cases in the future */
	263	if (PVR_VER(pvr) & 0x8000) {
a501d8f3 ML	264	switch (PVR_VER(pvr)) {
	265	case 0x8000: /* 7441/7450/7451, Voyager */
	266	case 0x8001: /* 7445/7455, Apollo 6 */
	267	case 0x8002: /* 7447/7457, Apollo 7 */
	268	case 0x8003: /* 7447A, Apollo 7 PM */
	269	case 0x8004: /* 7448, Apollo 8 */
	270	case 0x800c: /* 7410, Nitro */
	271	maj = ((pvr >> 8) & 0xF);
	272	min = PVR_MIN(pvr);
	273	break;
	274	default: /* e500/book-e */
	275	maj = PVR_MAJ(pvr);
	276	min = PVR_MIN(pvr);
	277	break;
	278	}
03501dab PM	279	} else {
	280	switch (PVR_VER(pvr)) {
	281	case 0x0020: /* 403 family */
	282	maj = PVR_MAJ(pvr) + 1;
	283	min = PVR_MIN(pvr);
	284	break;
	285	case 0x1008: /* 740P/750P ?? */
	286	maj = ((pvr >> 8) & 0xFF) - 1;
	287	min = pvr & 0xFF;
	288	break;
	289	default:
	290	maj = (pvr >> 8) & 0xFF;
	291	min = pvr & 0xFF;
	292	break;
	293	}
	294	}
	295
	296	seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
	297	maj, min, PVR_VER(pvr), PVR_REV(pvr));
	298
	299	#ifdef CONFIG_PPC32
	300	seq_printf(m, "bogomips\t: %lu.%02lu\n",
	301	loops_per_jiffy / (500000/HZ),
	302	(loops_per_jiffy / (5000/HZ)) % 100);
	303	#endif
	304
	305	#ifdef CONFIG_SMP
	306	seq_printf(m, "\n");
	307	#endif
	308
	309	preempt_enable();
e6532c63 AB	310
	311	/* If this is the last cpu, print the summary */
	312	if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids)
	313	show_cpuinfo_summary(m);
	314
03501dab PM	315	return 0;
	316	}
	317
	318	static void c_start(struct seq_file m, loff_t *pos)
	319	{
e6532c63 AB	320	if (pos == 0) / just in case, cpu 0 is not the first */
	321	*pos = cpumask_first(cpu_online_mask);
	322	else
	323	pos = cpumask_next(pos - 1, cpu_online_mask);
	324	if ((*pos) < nr_cpu_ids)
	325	return (void )(unsigned long)(pos + 1);
	326	return NULL;
03501dab PM	327	}
	328
	329	static void c_next(struct seq_file m, void v, loff_t pos)
	330	{
e6532c63	331	(*pos)++;
03501dab PM	332	return c_start(m, pos);
	333	}
	334
	335	static void c_stop(struct seq_file m, void v)
	336	{
	337	}
	338
88e9d34c	339	const struct seq_operations cpuinfo_op = {
03501dab PM	340	.start =c_start,
	341	.next = c_next,
	342	.stop = c_stop,
	343	.show = show_cpuinfo,
	344	};
	345
a82765b6 DW	346	void __init check_for_initrd(void)
	347	{
	348	#ifdef CONFIG_BLK_DEV_INITRD
30437b3e DG	349	DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n",
30437b3e DG	350	initrd_start, initrd_end);
a82765b6 DW	351
	352	/* If we were passed an initrd, set the ROOT_DEV properly if the values
	353	* look sensible. If not, clear initrd reference.
	354	*/
51fae6de	355	if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) &&
a82765b6 DW	356	initrd_end > initrd_start)
a82765b6 DW	357	ROOT_DEV = Root_RAM0;
6761c4a0	358	else
a82765b6	359	initrd_start = initrd_end = 0;
a82765b6 DW	360
	361	if (initrd_start)
	362	printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
	363
	364	DBG(" <- check_for_initrd()\n");
	365	#endif /* CONFIG_BLK_DEV_INITRD */
	366	}
	367
5ad57078 PM	368	#ifdef CONFIG_SMP
5ad57078 PM	369
8d089085 BH	370	int threads_per_core, threads_shift;
	371	cpumask_t threads_core_mask;
	372
	373	static void __init cpu_init_thread_core_maps(int tpc)
	374	{
	375	int i;
	376
	377	threads_per_core = tpc;
	378	threads_core_mask = CPU_MASK_NONE;
	379
	380	/* This implementation only supports power of 2 number of threads
	381	* for simplicity and performance
	382	*/
	383	threads_shift = ilog2(tpc);
	384	BUG_ON(tpc != (1 << threads_shift));
	385
	386	for (i = 0; i < tpc; i++)
	387	cpu_set(i, threads_core_mask);
	388
	389	printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n",
	390	tpc, tpc > 1 ? "s" : "");
	391	printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift);
	392	}
	393
	394
5ad57078 PM	395	/**
5ad57078 PM	396	* setup_cpu_maps - initialize the following cpu maps:
828a6986 AB	397	* cpu_possible_mask
828a6986 AB	398	* cpu_present_mask
5ad57078 PM	399	*
	400	* Having the possible map set up early allows us to restrict allocations
	401	* of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
	402	*
	403	* We do not initialize the online map here; cpus set their own bits in
828a6986	404	* cpu_online_mask as they come up.
5ad57078 PM	405	*
	406	* This function is valid only for Open Firmware systems. finish_device_tree
	407	* must be called before using this.
	408	*
	409	* While we're here, we may as well set the "physical" cpu ids in the paca.
4df20460 AB	410	*
4df20460 AB	411	* NOTE: This must match the parsing done in early_init_dt_scan_cpus.
5ad57078 PM	412	*/
	413	void __init smp_setup_cpu_maps(void)
	414	{
	415	struct device_node *dn = NULL;
	416	int cpu = 0;
8d089085 BH	417	int nthreads = 1;
	418
	419	DBG("smp_setup_cpu_maps()\n");
5ad57078 PM	420
5ad57078 PM	421	while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
a7f67bdf	422	const int *intserv;
8d089085 BH	423	int j, len;
	424
	425	DBG(" * %s...\n", dn->full_name);
5ad57078	426
e2eb6392 SR	427	intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",
e2eb6392 SR	428	&len);
8d089085	429	if (intserv) {
5ad57078	430	nthreads = len / sizeof(int);
8d089085 BH	431	DBG(" ibm,ppc-interrupt-server#s -> %d threads\n",
	432	nthreads);
	433	} else {
	434	DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n");
e2eb6392	435	intserv = of_get_property(dn, "reg", NULL);
5ad57078 PM	436	if (!intserv)
	437	intserv = &cpu; /* assume logical == phys */
	438	}
	439
	440	for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
8d089085 BH	441	DBG(" thread %d -> cpu %d (hard id %d)\n",
8d089085 BH	442	j, cpu, intserv[j]);
ea0f1cab	443	set_cpu_present(cpu, true);
5ad57078	444	set_hard_smp_processor_id(cpu, intserv[j]);
ea0f1cab	445	set_cpu_possible(cpu, true);
5ad57078 PM	446	cpu++;
	447	}
	448	}
	449
8d089085 BH	450	/* If no SMT supported, nthreads is forced to 1 */
	451	if (!cpu_has_feature(CPU_FTR_SMT)) {
	452	DBG(" SMT disabled ! nthreads forced to 1\n");
	453	nthreads = 1;
	454	}
	455
5ad57078 PM	456	#ifdef CONFIG_PPC64
	457	/*
	458	* On pSeries LPAR, we need to know how many cpus
	459	* could possibly be added to this partition.
	460	*/
e8222502	461	if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) &&
799d6046	462	(dn = of_find_node_by_path("/rtas"))) {
5ad57078	463	int num_addr_cell, num_size_cell, maxcpus;
a7f67bdf	464	const unsigned int *ireg;
5ad57078	465
a8bda5dd	466	num_addr_cell = of_n_addr_cells(dn);
9213feea	467	num_size_cell = of_n_size_cells(dn);
5ad57078	468
e2eb6392	469	ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL);
5ad57078 PM	470
	471	if (!ireg)
	472	goto out;
	473
	474	maxcpus = ireg[num_addr_cell + num_size_cell];
	475
	476	/* Double maxcpus for processors which have SMT capability */
	477	if (cpu_has_feature(CPU_FTR_SMT))
8d089085	478	maxcpus *= nthreads;
5ad57078 PM	479
	480	if (maxcpus > NR_CPUS) {
	481	printk(KERN_WARNING
	482	"Partition configured for %d cpus, "
	483	"operating system maximum is %d.\n",
	484	maxcpus, NR_CPUS);
	485	maxcpus = NR_CPUS;
	486	} else
	487	printk(KERN_INFO "Partition configured for %d cpus.\n",
	488	maxcpus);
	489
	490	for (cpu = 0; cpu < maxcpus; cpu++)
ea0f1cab	491	set_cpu_possible(cpu, true);
5ad57078 PM	492	out:
	493	of_node_put(dn);
	494	}
d5a7430d MT	495	vdso_data->processorCount = num_present_cpus();
d5a7430d MT	496	#endif /* CONFIG_PPC64 */
8d089085 BH	497
	498	/* Initialize CPU <=> thread mapping/
	499	*
	500	* WARNING: We assume that the number of threads is the same for
	501	* every CPU in the system. If that is not the case, then some code
	502	* here will have to be reworked
	503	*/
	504	cpu_init_thread_core_maps(nthreads);
1426d5a3 ME	505
1426d5a3 ME	506	free_unused_pacas();
d5a7430d	507	}
5ad57078	508	#endif /* CONFIG_SMP */
fca5dcd4	509
d33b78df	510	#ifdef CONFIG_PCSPKR_PLATFORM
e5c6c8e4 MN	511	static __init int add_pcspkr(void)
	512	{
	513	struct device_node *np;
	514	struct platform_device *pd;
	515	int ret;
	516
	517	np = of_find_compatible_node(NULL, NULL, "pnpPNP,100");
	518	of_node_put(np);
	519	if (!np)
	520	return -ENODEV;
	521
	522	pd = platform_device_alloc("pcspkr", -1);
	523	if (!pd)
	524	return -ENOMEM;
	525
	526	ret = platform_device_add(pd);
	527	if (ret)
	528	platform_device_put(pd);
	529
	530	return ret;
	531	}
	532	device_initcall(add_pcspkr);
d33b78df	533	#endif /* CONFIG_PCSPKR_PLATFORM */
95d465fd	534
e8222502 BH	535	void probe_machine(void)
	536	{
	537	extern struct machdep_calls __machine_desc_start;
	538	extern struct machdep_calls __machine_desc_end;
	539
	540	/*
	541	* Iterate all ppc_md structures until we find the proper
	542	* one for the current machine type
	543	*/
	544	DBG("Probing machine type ...\n");
	545
	546	for (machine_id = &__machine_desc_start;
	547	machine_id < &__machine_desc_end;
	548	machine_id++) {
	549	DBG(" %s ...", machine_id->name);
	550	memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
	551	if (ppc_md.probe()) {
	552	DBG(" match !\n");
	553	break;
	554	}
	555	DBG("\n");
	556	}
	557	/* What can we do if we didn't find ? */
	558	if (machine_id >= &__machine_desc_end) {
	559	DBG("No suitable machine found !\n");
	560	for (;;);
	561	}
	562
	563	printk(KERN_INFO "Using %s machine description\n", ppc_md.name);
	564	}
1269277a	565
8d8a0241	566	/* Match a class of boards, not a specific device configuration. */
1269277a DW	567	int check_legacy_ioport(unsigned long base_port)
1269277a DW	568	{
8d8a0241 OH	569	struct device_node parent, np = NULL;
	570	int ret = -ENODEV;
	571
	572	switch(base_port) {
	573	case I8042_DATA_REG:
db0dbae9 WF	574	if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303")))
	575	np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03");
	576	if (np) {
	577	parent = of_get_parent(np);
	578	of_node_put(np);
	579	np = parent;
	580	break;
	581	}
8d8a0241	582	np = of_find_node_by_type(NULL, "8042");
f5d834fc AC	583	/* Pegasos has no device_type on its 8042 node, look for the
	584	* name instead */
	585	if (!np)
	586	np = of_find_node_by_name(NULL, "8042");
8d8a0241 OH	587	break;
	588	case FDC_BASE: /* FDC1 */
	589	np = of_find_node_by_type(NULL, "fdc");
	590	break;
	591	#ifdef CONFIG_PPC_PREP
	592	case _PIDXR:
	593	case _PNPWRP:
	594	case PNPBIOS_BASE:
	595	/* implement me */
	596	#endif
	597	default:
	598	/* ipmi is supposed to fail here */
	599	break;
	600	}
	601	if (!np)
	602	return ret;
	603	parent = of_get_parent(np);
	604	if (parent) {
	605	if (strcmp(parent->type, "isa") == 0)
	606	ret = 0;
	607	of_node_put(parent);
	608	}
	609	of_node_put(np);
	610	return ret;
1269277a DW	611	}
1269277a DW	612	EXPORT_SYMBOL(check_legacy_ioport);
7e990266 KG	613
	614	static int ppc_panic_event(struct notifier_block *this,
	615	unsigned long event, void *ptr)
	616	{
	617	ppc_md.panic(ptr); /* May not return */
	618	return NOTIFY_DONE;
	619	}
	620
	621	static struct notifier_block ppc_panic_block = {
	622	.notifier_call = ppc_panic_event,
	623	.priority = INT_MIN /* may not return; must be done last */
	624	};
	625
	626	void __init setup_panic(void)
	627	{
	628	atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
	629	}
06cce43c DF	630
	631	#ifdef CONFIG_CHECK_CACHE_COHERENCY
	632	/*
	633	* For platforms that have configurable cache-coherency. This function
	634	* checks that the cache coherency setting of the kernel matches the setting
	635	* left by the firmware, as indicated in the device tree. Since a mismatch
	636	* will eventually result in DMA failures, we print * and error and call
	637	* BUG() in that case.
	638	*/
	639
	640	#ifdef CONFIG_NOT_COHERENT_CACHE
	641	#define KERNEL_COHERENCY 0
	642	#else
	643	#define KERNEL_COHERENCY 1
	644	#endif
	645
	646	static int __init check_cache_coherency(void)
	647	{
	648	struct device_node *np;
	649	const void *prop;
	650	int devtree_coherency;
	651
	652	np = of_find_node_by_path("/");
	653	prop = of_get_property(np, "coherency-off", NULL);
	654	of_node_put(np);
	655
	656	devtree_coherency = prop ? 0 : 1;
	657
	658	if (devtree_coherency != KERNEL_COHERENCY) {
	659	printk(KERN_ERR
	660	"kernel coherency:%s != device tree_coherency:%s\n",
	661	KERNEL_COHERENCY ? "on" : "off",
	662	devtree_coherency ? "on" : "off");
	663	BUG();
	664	}
	665
	666	return 0;
	667	}
	668
	669	late_initcall(check_cache_coherency);
	670	#endif /* CONFIG_CHECK_CACHE_COHERENCY */
94a3807c ME	671
	672	#ifdef CONFIG_DEBUG_FS
	673	struct dentry *powerpc_debugfs_root;
907b1f45	674	EXPORT_SYMBOL(powerpc_debugfs_root);
94a3807c ME	675
	676	static int powerpc_debugfs_init(void)
	677	{
	678	powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL);
	679
	680	return powerpc_debugfs_root == NULL;
	681	}
	682	arch_initcall(powerpc_debugfs_init);
	683	#endif
d746286c KG	684
	685	static int ppc_dflt_bus_notify(struct notifier_block *nb,
	686	unsigned long action, void *data)
	687	{
	688	struct device *dev = data;
	689
	690	/* We are only intereted in device addition */
	691	if (action != BUS_NOTIFY_ADD_DEVICE)
	692	return 0;
	693
	694	set_dma_ops(dev, &dma_direct_ops);
	695
	696	return NOTIFY_DONE;
	697	}
	698
	699	static struct notifier_block ppc_dflt_plat_bus_notifier = {
	700	.notifier_call = ppc_dflt_bus_notify,
	701	.priority = INT_MAX,
	702	};
	703
	704	static struct notifier_block ppc_dflt_of_bus_notifier = {
	705	.notifier_call = ppc_dflt_bus_notify,
	706	.priority = INT_MAX,
	707	};
	708
	709	static int __init setup_bus_notifier(void)
	710	{
	711	bus_register_notifier(&platform_bus_type, &ppc_dflt_plat_bus_notifier);
	712	bus_register_notifier(&of_platform_bus_type, &ppc_dflt_of_bus_notifier);
	713
	714	return 0;
	715	}
	716
	717	arch_initcall(setup_bus_notifier);