[linux-block.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/utsname.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 <asm/io.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/lmb.h>
#include <asm/xmon.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, pvr);
#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;

	if (cpu_id == NR_CPUS) {
#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);
		if (ppc_md.show_cpuinfo != NULL)
			ppc_md.show_cpuinfo(m);

		return 0;
	}

	/* 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(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) {
		maj = PVR_MAJ(pvr);
		min = PVR_MIN(pvr);
	} 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();
	return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	unsigned long i = *pos;

	return i <= NR_CPUS ? (void *)(i + 1) : 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)
{
}

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

/**
 * setup_cpu_maps - initialize the following cpu maps:
 *                  cpu_possible_map
 *                  cpu_present_map
 *                  cpu_sibling_map
 *
 * 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_map 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;

	while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
		const int *intserv;
		int j, len = sizeof(u32), nthreads = 1;

		intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",
				&len);
		if (intserv)
			nthreads = len / sizeof(int);
		else {
			intserv = of_get_property(dn, "reg", NULL);
			if (!intserv)
				intserv = &cpu;	/* assume logical == phys */
		}

		for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
			cpu_set(cpu, cpu_present_map);
			set_hard_smp_processor_id(cpu, intserv[j]);
			cpu_set(cpu, cpu_possible_map);
			cpu++;
		}
	}

#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 *= 2;

		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++)
			cpu_set(cpu, cpu_possible_map);
	out:
		of_node_put(dn);
	}

	/*
	 * Do the sibling map; assume only two threads per processor.
	 */
	for_each_possible_cpu(cpu) {
		cpu_set(cpu, cpu_sibling_map[cpu]);
		if (cpu_has_feature(CPU_FTR_SMT))
			cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
	}

	vdso_data->processorCount = num_present_cpus();
#endif /* CONFIG_PPC64 */
}
#endif /* CONFIG_SMP */

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);

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;

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
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>
	27	#include <linux/utsname.h>
894673ee	28	#include <linux/screen_info.h>
03501dab PM	29	#include <linux/root_dev.h>
	30	#include <linux/notifier.h>
	31	#include <linux/cpu.h>
	32	#include <linux/unistd.h>
	33	#include <linux/serial.h>
	34	#include <linux/serial_8250.h>
94a3807c	35	#include <linux/debugfs.h>
03501dab PM	36	#include <asm/io.h>
	37	#include <asm/prom.h>
	38	#include <asm/processor.h>
a7f290da	39	#include <asm/vdso_datapage.h>
03501dab	40	#include <asm/pgtable.h>
03501dab PM	41	#include <asm/smp.h>
	42	#include <asm/elf.h>
	43	#include <asm/machdep.h>
	44	#include <asm/time.h>
	45	#include <asm/cputable.h>
	46	#include <asm/sections.h>
e8222502	47	#include <asm/firmware.h>
03501dab PM	48	#include <asm/btext.h>
	49	#include <asm/nvram.h>
	50	#include <asm/setup.h>
	51	#include <asm/system.h>
	52	#include <asm/rtas.h>
	53	#include <asm/iommu.h>
	54	#include <asm/serial.h>
	55	#include <asm/cache.h>
	56	#include <asm/page.h>
	57	#include <asm/mmu.h>
	58	#include <asm/lmb.h>
fca5dcd4	59	#include <asm/xmon.h>
03501dab	60
66ba135c SR	61	#include "setup.h"
66ba135c SR	62
03501dab	63	#ifdef DEBUG
f9e4ec57	64	#include <asm/udbg.h>
03501dab PM	65	#define DBG(fmt...) udbg_printf(fmt)
	66	#else
	67	#define DBG(fmt...)
	68	#endif
	69
e8222502 BH	70	/* The main machine-dep calls structure
	71	*/
	72	struct machdep_calls ppc_md;
	73	EXPORT_SYMBOL(ppc_md);
	74	struct machdep_calls *machine_id;
	75	EXPORT_SYMBOL(machine_id);
799d6046	76
49b09853 PM	77	unsigned long klimit = (unsigned long) _end;
49b09853 PM	78
19a8d97d SR	79	char cmd_line[COMMAND_LINE_SIZE];
19a8d97d SR	80
03501dab PM	81	/*
	82	* This still seems to be needed... -- paulus
	83	*/
	84	struct screen_info screen_info = {
	85	.orig_x = 0,
	86	.orig_y = 25,
	87	.orig_video_cols = 80,
	88	.orig_video_lines = 25,
	89	.orig_video_isVGA = 1,
	90	.orig_video_points = 16
	91	};
	92
	93	#ifdef __DO_IRQ_CANON
	94	/* XXX should go elsewhere eventually */
	95	int ppc_do_canonicalize_irqs;
	96	EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
	97	#endif
	98
	99	/* also used by kexec */
	100	void machine_shutdown(void)
	101	{
3d1229d6 ME	102	if (ppc_md.machine_shutdown)
3d1229d6 ME	103	ppc_md.machine_shutdown();
03501dab PM	104	}
	105
	106	void machine_restart(char *cmd)
	107	{
	108	machine_shutdown();
b8e383d5 KG	109	if (ppc_md.restart)
b8e383d5 KG	110	ppc_md.restart(cmd);
03501dab PM	111	#ifdef CONFIG_SMP
	112	smp_send_stop();
	113	#endif
	114	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	115	local_irq_disable();
	116	while (1) ;
	117	}
	118
	119	void machine_power_off(void)
	120	{
	121	machine_shutdown();
b8e383d5 KG	122	if (ppc_md.power_off)
b8e383d5 KG	123	ppc_md.power_off();
03501dab PM	124	#ifdef CONFIG_SMP
	125	smp_send_stop();
	126	#endif
	127	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	128	local_irq_disable();
	129	while (1) ;
	130	}
	131	/* Used by the G5 thermal driver */
	132	EXPORT_SYMBOL_GPL(machine_power_off);
	133
	134	void (*pm_power_off)(void) = machine_power_off;
	135	EXPORT_SYMBOL_GPL(pm_power_off);
	136
	137	void machine_halt(void)
	138	{
	139	machine_shutdown();
b8e383d5 KG	140	if (ppc_md.halt)
b8e383d5 KG	141	ppc_md.halt();
03501dab PM	142	#ifdef CONFIG_SMP
	143	smp_send_stop();
	144	#endif
	145	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	146	local_irq_disable();
	147	while (1) ;
	148	}
	149
	150
	151	#ifdef CONFIG_TAU
	152	extern u32 cpu_temp(unsigned long cpu);
	153	extern u32 cpu_temp_both(unsigned long cpu);
	154	#endif /* CONFIG_TAU */
	155
	156	#ifdef CONFIG_SMP
	157	DEFINE_PER_CPU(unsigned int, pvr);
	158	#endif
	159
	160	static int show_cpuinfo(struct seq_file m, void v)
	161	{
	162	unsigned long cpu_id = (unsigned long)v - 1;
	163	unsigned int pvr;
	164	unsigned short maj;
	165	unsigned short min;
	166
	167	if (cpu_id == NR_CPUS) {
	168	#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
	169	unsigned long bogosum = 0;
	170	int i;
394e3902 AM	171	for_each_online_cpu(i)
394e3902 AM	172	bogosum += loops_per_jiffy;
03501dab PM	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);
e8222502 BH	177	if (ppc_md.name)
e8222502 BH	178	seq_printf(m, "platform\t: %s\n", ppc_md.name);
03501dab PM	179	if (ppc_md.show_cpuinfo != NULL)
	180	ppc_md.show_cpuinfo(m);
	181
	182	return 0;
	183	}
	184
	185	/* We only show online cpus: disable preempt (overzealous, I
	186	* knew) to prevent cpu going down. */
	187	preempt_disable();
	188	if (!cpu_online(cpu_id)) {
	189	preempt_enable();
	190	return 0;
	191	}
	192
	193	#ifdef CONFIG_SMP
03501dab	194	pvr = per_cpu(pvr, cpu_id);
03501dab PM	195	#else
	196	pvr = mfspr(SPRN_PVR);
	197	#endif
	198	maj = (pvr >> 8) & 0xFF;
	199	min = pvr & 0xFF;
	200
	201	seq_printf(m, "processor\t: %lu\n", cpu_id);
	202	seq_printf(m, "cpu\t\t: ");
	203
	204	if (cur_cpu_spec->pvr_mask)
	205	seq_printf(m, "%s", cur_cpu_spec->cpu_name);
	206	else
	207	seq_printf(m, "unknown (%08x)", pvr);
	208
	209	#ifdef CONFIG_ALTIVEC
	210	if (cpu_has_feature(CPU_FTR_ALTIVEC))
	211	seq_printf(m, ", altivec supported");
	212	#endif /* CONFIG_ALTIVEC */
	213
	214	seq_printf(m, "\n");
	215
	216	#ifdef CONFIG_TAU
	217	if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
	218	#ifdef CONFIG_TAU_AVERAGE
	219	/* more straightforward, but potentially misleading */
	220	seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
bccfd588	221	cpu_temp(cpu_id));
03501dab PM	222	#else
	223	/* show the actual temp sensor range */
	224	u32 temp;
bccfd588	225	temp = cpu_temp_both(cpu_id);
03501dab PM	226	seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
	227	temp & 0xff, temp >> 16);
	228	#endif
	229	}
	230	#endif /* CONFIG_TAU */
	231
	232	/*
	233	* Assume here that all clock rates are the same in a
	234	* smp system. -- Cort
	235	*/
	236	if (ppc_proc_freq)
	237	seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
	238	ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
	239
	240	if (ppc_md.show_percpuinfo != NULL)
	241	ppc_md.show_percpuinfo(m, cpu_id);
	242
	243	/* If we are a Freescale core do a simple check so
	244	* we dont have to keep adding cases in the future */
	245	if (PVR_VER(pvr) & 0x8000) {
	246	maj = PVR_MAJ(pvr);
	247	min = PVR_MIN(pvr);
	248	} else {
	249	switch (PVR_VER(pvr)) {
	250	case 0x0020: /* 403 family */
	251	maj = PVR_MAJ(pvr) + 1;
	252	min = PVR_MIN(pvr);
	253	break;
	254	case 0x1008: /* 740P/750P ?? */
	255	maj = ((pvr >> 8) & 0xFF) - 1;
	256	min = pvr & 0xFF;
	257	break;
	258	default:
	259	maj = (pvr >> 8) & 0xFF;
	260	min = pvr & 0xFF;
	261	break;
	262	}
	263	}
	264
	265	seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
	266	maj, min, PVR_VER(pvr), PVR_REV(pvr));
	267
	268	#ifdef CONFIG_PPC32
	269	seq_printf(m, "bogomips\t: %lu.%02lu\n",
	270	loops_per_jiffy / (500000/HZ),
	271	(loops_per_jiffy / (5000/HZ)) % 100);
	272	#endif
	273
	274	#ifdef CONFIG_SMP
	275	seq_printf(m, "\n");
	276	#endif
	277
	278	preempt_enable();
	279	return 0;
	280	}
	281
	282	static void c_start(struct seq_file m, loff_t *pos)
	283	{
	284	unsigned long i = *pos;
	285
	286	return i <= NR_CPUS ? (void *)(i + 1) : NULL;
	287	}
	288
	289	static void c_next(struct seq_file m, void v, loff_t pos)
290	{
291	++*pos;
292	return c_start(m, pos);
293	}
294
295	static void c_stop(struct seq_file m, void v)
296	{
297	}
298
299	struct seq_operations cpuinfo_op = {
300	.start =c_start,
301	.next = c_next,
302	.stop = c_stop,
303	.show = show_cpuinfo,
304	};
305
a82765b6 DW	306	void __init check_for_initrd(void)
	307	{
	308	#ifdef CONFIG_BLK_DEV_INITRD
30437b3e DG	309	DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n",
30437b3e DG	310	initrd_start, initrd_end);
a82765b6 DW	311
	312	/* If we were passed an initrd, set the ROOT_DEV properly if the values
	313	* look sensible. If not, clear initrd reference.
	314	*/
51fae6de	315	if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) &&
a82765b6 DW	316	initrd_end > initrd_start)
a82765b6 DW	317	ROOT_DEV = Root_RAM0;
6761c4a0	318	else
a82765b6	319	initrd_start = initrd_end = 0;
a82765b6 DW	320
	321	if (initrd_start)
	322	printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
	323
	324	DBG(" <- check_for_initrd()\n");
	325	#endif /* CONFIG_BLK_DEV_INITRD */
	326	}
	327
5ad57078 PM	328	#ifdef CONFIG_SMP
	329
	330	/**
	331	* setup_cpu_maps - initialize the following cpu maps:
	332	* cpu_possible_map
	333	* cpu_present_map
	334	* cpu_sibling_map
	335	*
	336	* Having the possible map set up early allows us to restrict allocations
	337	* of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
	338	*
	339	* We do not initialize the online map here; cpus set their own bits in
	340	* cpu_online_map as they come up.
	341	*
	342	* This function is valid only for Open Firmware systems. finish_device_tree
	343	* must be called before using this.
	344	*
	345	* While we're here, we may as well set the "physical" cpu ids in the paca.
4df20460 AB	346	*
4df20460 AB	347	* NOTE: This must match the parsing done in early_init_dt_scan_cpus.
5ad57078 PM	348	*/
	349	void __init smp_setup_cpu_maps(void)
	350	{
	351	struct device_node *dn = NULL;
	352	int cpu = 0;
5ad57078 PM	353
5ad57078 PM	354	while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
a7f67bdf	355	const int *intserv;
5ad57078 PM	356	int j, len = sizeof(u32), nthreads = 1;
5ad57078 PM	357
e2eb6392 SR	358	intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",
e2eb6392 SR	359	&len);
5ad57078 PM	360	if (intserv)
	361	nthreads = len / sizeof(int);
	362	else {
e2eb6392	363	intserv = of_get_property(dn, "reg", NULL);
5ad57078 PM	364	if (!intserv)
	365	intserv = &cpu; /* assume logical == phys */
	366	}
	367
	368	for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
	369	cpu_set(cpu, cpu_present_map);
	370	set_hard_smp_processor_id(cpu, intserv[j]);
5ad57078 PM	371	cpu_set(cpu, cpu_possible_map);
	372	cpu++;
	373	}
	374	}
	375
5ad57078 PM	376	#ifdef CONFIG_PPC64
	377	/*
	378	* On pSeries LPAR, we need to know how many cpus
	379	* could possibly be added to this partition.
	380	*/
e8222502	381	if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) &&
799d6046	382	(dn = of_find_node_by_path("/rtas"))) {
5ad57078	383	int num_addr_cell, num_size_cell, maxcpus;
a7f67bdf	384	const unsigned int *ireg;
5ad57078	385
a8bda5dd	386	num_addr_cell = of_n_addr_cells(dn);
9213feea	387	num_size_cell = of_n_size_cells(dn);
5ad57078	388
e2eb6392	389	ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL);
5ad57078 PM	390
	391	if (!ireg)
	392	goto out;
	393
	394	maxcpus = ireg[num_addr_cell + num_size_cell];
	395
	396	/* Double maxcpus for processors which have SMT capability */
	397	if (cpu_has_feature(CPU_FTR_SMT))
	398	maxcpus *= 2;
	399
	400	if (maxcpus > NR_CPUS) {
	401	printk(KERN_WARNING
	402	"Partition configured for %d cpus, "
	403	"operating system maximum is %d.\n",
	404	maxcpus, NR_CPUS);
	405	maxcpus = NR_CPUS;
	406	} else
	407	printk(KERN_INFO "Partition configured for %d cpus.\n",
	408	maxcpus);
	409
	410	for (cpu = 0; cpu < maxcpus; cpu++)
	411	cpu_set(cpu, cpu_possible_map);
	412	out:
	413	of_node_put(dn);
	414	}
	415
	416	/*
	417	* Do the sibling map; assume only two threads per processor.
	418	*/
0e551954	419	for_each_possible_cpu(cpu) {
5ad57078 PM	420	cpu_set(cpu, cpu_sibling_map[cpu]);
	421	if (cpu_has_feature(CPU_FTR_SMT))
	422	cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
	423	}
	424
a7f290da	425	vdso_data->processorCount = num_present_cpus();
5ad57078 PM	426	#endif /* CONFIG_PPC64 */
	427	}
	428	#endif /* CONFIG_SMP */
fca5dcd4	429
e5c6c8e4 MN	430	static __init int add_pcspkr(void)
	431	{
	432	struct device_node *np;
	433	struct platform_device *pd;
	434	int ret;
	435
	436	np = of_find_compatible_node(NULL, NULL, "pnpPNP,100");
	437	of_node_put(np);
	438	if (!np)
	439	return -ENODEV;
	440
	441	pd = platform_device_alloc("pcspkr", -1);
	442	if (!pd)
	443	return -ENOMEM;
	444
	445	ret = platform_device_add(pd);
	446	if (ret)
	447	platform_device_put(pd);
	448
	449	return ret;
	450	}
	451	device_initcall(add_pcspkr);
95d465fd	452
e8222502 BH	453	void probe_machine(void)
	454	{
	455	extern struct machdep_calls __machine_desc_start;
	456	extern struct machdep_calls __machine_desc_end;
	457
	458	/*
	459	* Iterate all ppc_md structures until we find the proper
	460	* one for the current machine type
	461	*/
	462	DBG("Probing machine type ...\n");
	463
	464	for (machine_id = &__machine_desc_start;
	465	machine_id < &__machine_desc_end;
	466	machine_id++) {
	467	DBG(" %s ...", machine_id->name);
	468	memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
	469	if (ppc_md.probe()) {
	470	DBG(" match !\n");
	471	break;
	472	}
	473	DBG("\n");
	474	}
	475	/* What can we do if we didn't find ? */
	476	if (machine_id >= &__machine_desc_end) {
	477	DBG("No suitable machine found !\n");
	478	for (;;);
	479	}
	480
	481	printk(KERN_INFO "Using %s machine description\n", ppc_md.name);
	482	}
1269277a	483
8d8a0241	484	/* Match a class of boards, not a specific device configuration. */
1269277a DW	485	int check_legacy_ioport(unsigned long base_port)
1269277a DW	486	{
8d8a0241 OH	487	struct device_node parent, np = NULL;
	488	int ret = -ENODEV;
	489
	490	switch(base_port) {
	491	case I8042_DATA_REG:
db0dbae9 WF	492	if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303")))
	493	np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03");
	494	if (np) {
	495	parent = of_get_parent(np);
	496	of_node_put(np);
	497	np = parent;
	498	break;
	499	}
8d8a0241	500	np = of_find_node_by_type(NULL, "8042");
f5d834fc AC	501	/* Pegasos has no device_type on its 8042 node, look for the
	502	* name instead */
	503	if (!np)
	504	np = of_find_node_by_name(NULL, "8042");
8d8a0241 OH	505	break;
	506	case FDC_BASE: /* FDC1 */
	507	np = of_find_node_by_type(NULL, "fdc");
	508	break;
	509	#ifdef CONFIG_PPC_PREP
	510	case _PIDXR:
	511	case _PNPWRP:
	512	case PNPBIOS_BASE:
	513	/* implement me */
	514	#endif
	515	default:
	516	/* ipmi is supposed to fail here */
	517	break;
	518	}
	519	if (!np)
	520	return ret;
	521	parent = of_get_parent(np);
	522	if (parent) {
	523	if (strcmp(parent->type, "isa") == 0)
	524	ret = 0;
	525	of_node_put(parent);
	526	}
	527	of_node_put(np);
	528	return ret;
1269277a DW	529	}
1269277a DW	530	EXPORT_SYMBOL(check_legacy_ioport);
7e990266 KG	531
	532	static int ppc_panic_event(struct notifier_block *this,
	533	unsigned long event, void *ptr)
	534	{
	535	ppc_md.panic(ptr); /* May not return */
	536	return NOTIFY_DONE;
	537	}
	538
	539	static struct notifier_block ppc_panic_block = {
	540	.notifier_call = ppc_panic_event,
	541	.priority = INT_MIN /* may not return; must be done last */
	542	};
	543
	544	void __init setup_panic(void)
	545	{
	546	atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
	547	}
06cce43c DF	548
	549	#ifdef CONFIG_CHECK_CACHE_COHERENCY
	550	/*
	551	* For platforms that have configurable cache-coherency. This function
	552	* checks that the cache coherency setting of the kernel matches the setting
	553	* left by the firmware, as indicated in the device tree. Since a mismatch
	554	* will eventually result in DMA failures, we print * and error and call
	555	* BUG() in that case.
	556	*/
	557
	558	#ifdef CONFIG_NOT_COHERENT_CACHE
	559	#define KERNEL_COHERENCY 0
	560	#else
	561	#define KERNEL_COHERENCY 1
	562	#endif
	563
	564	static int __init check_cache_coherency(void)
	565	{
	566	struct device_node *np;
	567	const void *prop;
	568	int devtree_coherency;
	569
	570	np = of_find_node_by_path("/");
	571	prop = of_get_property(np, "coherency-off", NULL);
	572	of_node_put(np);
	573
	574	devtree_coherency = prop ? 0 : 1;
	575
	576	if (devtree_coherency != KERNEL_COHERENCY) {
	577	printk(KERN_ERR
	578	"kernel coherency:%s != device tree_coherency:%s\n",
	579	KERNEL_COHERENCY ? "on" : "off",
	580	devtree_coherency ? "on" : "off");
	581	BUG();
	582	}
	583
	584	return 0;
	585	}
	586
	587	late_initcall(check_cache_coherency);
	588	#endif /* CONFIG_CHECK_CACHE_COHERENCY */
94a3807c ME	589
	590	#ifdef CONFIG_DEBUG_FS
	591	struct dentry *powerpc_debugfs_root;
	592
	593	static int powerpc_debugfs_init(void)
	594	{
	595	powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL);
	596
	597	return powerpc_debugfs_root == NULL;
	598	}
	599	arch_initcall(powerpc_debugfs_init);
	600	#endif