[deliverable/linux.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.
 */
#include <linux/config.h>
#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/ide.h>
#include <linux/seq_file.h>
#include <linux/ioport.h>
#include <linux/console.h>
#include <linux/utsname.h>
#include <linux/tty.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 <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/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"

#undef DEBUG

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

#ifdef CONFIG_PPC_MULTIPLATFORM
int _machine = 0;
EXPORT_SYMBOL(_machine);
#endif

unsigned long klimit = (unsigned long) _end;

/*
 * 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.nvram_sync)
		ppc_md.nvram_sync();
}

void machine_restart(char *cmd)
{
	machine_shutdown();
	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();
	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();
	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 (i = 0; i < NR_CPUS; ++i)
			if (cpu_online(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.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,
};

#ifdef CONFIG_PPC_MULTIPLATFORM
static int __init set_preferred_console(void)
{
	struct device_node *prom_stdout = NULL;
	char *name;
	u32 *spd;
	int offset = 0;

	DBG(" -> set_preferred_console()\n");

	/* The user has requested a console so this is already set up. */
	if (strstr(saved_command_line, "console=")) {
		DBG(" console was specified !\n");
		return -EBUSY;
	}

	if (!of_chosen) {
		DBG(" of_chosen is NULL !\n");
		return -ENODEV;
	}
	/* We are getting a weird phandle from OF ... */
	/* ... So use the full path instead */
	name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
	if (name == NULL) {
		DBG(" no linux,stdout-path !\n");
		return -ENODEV;
	}
	prom_stdout = of_find_node_by_path(name);
	if (!prom_stdout) {
		DBG(" can't find stdout package %s !\n", name);
		return -ENODEV;
	}	
	DBG("stdout is %s\n", prom_stdout->full_name);

	name = (char *)get_property(prom_stdout, "name", NULL);
	if (!name) {
		DBG(" stdout package has no name !\n");
		goto not_found;
	}
	spd = (u32 *)get_property(prom_stdout, "current-speed", NULL);

	if (0)
		;
#ifdef CONFIG_SERIAL_8250_CONSOLE
	else if (strcmp(name, "serial") == 0) {
		int i;
		u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
		if (i > 8) {
			switch (reg[1]) {
				case 0x3f8:
					offset = 0;
					break;
				case 0x2f8:
					offset = 1;
					break;
				case 0x898:
					offset = 2;
					break;
				case 0x890:
					offset = 3;
					break;
				default:
					/* We dont recognise the serial port */
					goto not_found;
			}
		}
	}
#endif /* CONFIG_SERIAL_8250_CONSOLE */
#ifdef CONFIG_PPC_PSERIES
	else if (strcmp(name, "vty") == 0) {
 		u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL);
 		char *compat = (char *)get_property(prom_stdout, "compatible", NULL);

 		if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) {
 			/* Host Virtual Serial Interface */
 			switch (reg[0]) {
 				case 0x30000000:
 					offset = 0;
 					break;
 				case 0x30000001:
 					offset = 1;
 					break;
 				default:
					goto not_found;
 			}
			of_node_put(prom_stdout);
			DBG("Found hvsi console at offset %d\n", offset);
 			return add_preferred_console("hvsi", offset, NULL);
 		} else {
 			/* pSeries LPAR virtual console */
			of_node_put(prom_stdout);
			DBG("Found hvc console\n");
 			return add_preferred_console("hvc", 0, NULL);
 		}
	}
#endif /* CONFIG_PPC_PSERIES */
#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
	else if (strcmp(name, "ch-a") == 0)
		offset = 0;
	else if (strcmp(name, "ch-b") == 0)
		offset = 1;
#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
	else
		goto not_found;
	of_node_put(prom_stdout);

	DBG("Found serial console at ttyS%d\n", offset);

	if (spd) {
		static char __initdata opt[16];
		sprintf(opt, "%d", *spd);
		return add_preferred_console("ttyS", offset, opt);
	} else
		return add_preferred_console("ttyS", offset, NULL);

 not_found:
	DBG("No preferred console found !\n");
	of_node_put(prom_stdout);
	return -ENODEV;
}
console_initcall(set_preferred_console);
#endif /* CONFIG_PPC_MULTIPLATFORM */

void __init check_for_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
	unsigned long *prop;

	DBG(" -> check_for_initrd()\n");

	if (of_chosen) {
		prop = (unsigned long *)get_property(of_chosen,
				"linux,initrd-start", NULL);
		if (prop != NULL) {
			initrd_start = (unsigned long)__va(*prop);
			prop = (unsigned long *)get_property(of_chosen,
					"linux,initrd-end", NULL);
			if (prop != NULL) {
				initrd_end = (unsigned long)__va(*prop);
				initrd_below_start_ok = 1;
			} else
				initrd_start = 0;
		}
	}

	/* If we were passed an initrd, set the ROOT_DEV properly if the values
	 * look sensible. If not, clear initrd reference.
	 */
	if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
	    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.
 */
void __init smp_setup_cpu_maps(void)
{
	struct device_node *dn = NULL;
	int cpu = 0;
	int swap_cpuid = 0;

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

		intserv = (int *)get_property(dn, "ibm,ppc-interrupt-server#s",
					      &len);
		if (intserv)
			nthreads = len / sizeof(int);
		else {
			intserv = (int *) 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]);

			if (intserv[j] == boot_cpuid_phys)
				swap_cpuid = cpu;
			cpu_set(cpu, cpu_possible_map);
			cpu++;
		}
	}

	/* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
	 * boot cpu is logical 0.
	 */
	if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
		u32 tmp;
		tmp = get_hard_smp_processor_id(0);
		set_hard_smp_processor_id(0, boot_cpuid_phys);
		set_hard_smp_processor_id(swap_cpuid, tmp);
	}

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

		num_addr_cell = prom_n_addr_cells(dn);
		num_size_cell = prom_n_size_cells(dn);

		ireg = (unsigned int *)
			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_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 */

#ifdef CONFIG_XMON
static int __init early_xmon(char *p)
{
	/* ensure xmon is enabled */
	if (p) {
		if (strncmp(p, "on", 2) == 0)
			xmon_init(1);
		if (strncmp(p, "off", 3) == 0)
			xmon_init(0);
		if (strncmp(p, "early", 5) != 0)
			return 0;
	}
	xmon_init(1);
	debugger(NULL);

	return 0;
}
early_param("xmon", early_xmon);
#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	*/
	12	#include <linux/config.h>
	13	#include <linux/module.h>
	14	#include <linux/string.h>
	15	#include <linux/sched.h>
	16	#include <linux/init.h>
	17	#include <linux/kernel.h>
	18	#include <linux/reboot.h>
	19	#include <linux/delay.h>
	20	#include <linux/initrd.h>
	21	#include <linux/ide.h>
	22	#include <linux/seq_file.h>
	23	#include <linux/ioport.h>
	24	#include <linux/console.h>
	25	#include <linux/utsname.h>
	26	#include <linux/tty.h>
	27	#include <linux/root_dev.h>
	28	#include <linux/notifier.h>
	29	#include <linux/cpu.h>
	30	#include <linux/unistd.h>
	31	#include <linux/serial.h>
	32	#include <linux/serial_8250.h>
	33	#include <asm/io.h>
	34	#include <asm/prom.h>
	35	#include <asm/processor.h>
a7f290da	36	#include <asm/vdso_datapage.h>
03501dab	37	#include <asm/pgtable.h>
03501dab PM	38	#include <asm/smp.h>
	39	#include <asm/elf.h>
	40	#include <asm/machdep.h>
	41	#include <asm/time.h>
	42	#include <asm/cputable.h>
	43	#include <asm/sections.h>
	44	#include <asm/btext.h>
	45	#include <asm/nvram.h>
	46	#include <asm/setup.h>
	47	#include <asm/system.h>
	48	#include <asm/rtas.h>
	49	#include <asm/iommu.h>
	50	#include <asm/serial.h>
	51	#include <asm/cache.h>
	52	#include <asm/page.h>
	53	#include <asm/mmu.h>
	54	#include <asm/lmb.h>
fca5dcd4	55	#include <asm/xmon.h>
03501dab	56
66ba135c SR	57	#include "setup.h"
66ba135c SR	58
03501dab PM	59	#undef DEBUG
	60
	61	#ifdef DEBUG
f9e4ec57	62	#include <asm/udbg.h>
03501dab PM	63	#define DBG(fmt...) udbg_printf(fmt)
	64	#else
	65	#define DBG(fmt...)
	66	#endif
	67
799d6046 PM	68	#ifdef CONFIG_PPC_MULTIPLATFORM
	69	int _machine = 0;
	70	EXPORT_SYMBOL(_machine);
	71	#endif
	72
49b09853 PM	73	unsigned long klimit = (unsigned long) _end;
49b09853 PM	74
03501dab PM	75	/*
	76	* This still seems to be needed... -- paulus
	77	*/
	78	struct screen_info screen_info = {
	79	.orig_x = 0,
	80	.orig_y = 25,
	81	.orig_video_cols = 80,
	82	.orig_video_lines = 25,
	83	.orig_video_isVGA = 1,
	84	.orig_video_points = 16
	85	};
	86
	87	#ifdef __DO_IRQ_CANON
	88	/* XXX should go elsewhere eventually */
	89	int ppc_do_canonicalize_irqs;
	90	EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
	91	#endif
	92
	93	/* also used by kexec */
	94	void machine_shutdown(void)
	95	{
	96	if (ppc_md.nvram_sync)
	97	ppc_md.nvram_sync();
	98	}
	99
	100	void machine_restart(char *cmd)
	101	{
	102	machine_shutdown();
	103	ppc_md.restart(cmd);
	104	#ifdef CONFIG_SMP
	105	smp_send_stop();
	106	#endif
	107	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	108	local_irq_disable();
	109	while (1) ;
	110	}
	111
	112	void machine_power_off(void)
	113	{
	114	machine_shutdown();
	115	ppc_md.power_off();
	116	#ifdef CONFIG_SMP
	117	smp_send_stop();
	118	#endif
	119	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	120	local_irq_disable();
	121	while (1) ;
	122	}
	123	/* Used by the G5 thermal driver */
	124	EXPORT_SYMBOL_GPL(machine_power_off);
	125
	126	void (*pm_power_off)(void) = machine_power_off;
	127	EXPORT_SYMBOL_GPL(pm_power_off);
	128
	129	void machine_halt(void)
	130	{
	131	machine_shutdown();
	132	ppc_md.halt();
	133	#ifdef CONFIG_SMP
	134	smp_send_stop();
	135	#endif
	136	printk(KERN_EMERG "System Halted, OK to turn off power\n");
	137	local_irq_disable();
	138	while (1) ;
139	}
140
141
142	#ifdef CONFIG_TAU
143	extern u32 cpu_temp(unsigned long cpu);
144	extern u32 cpu_temp_both(unsigned long cpu);
145	#endif /* CONFIG_TAU */
146
147	#ifdef CONFIG_SMP
148	DEFINE_PER_CPU(unsigned int, pvr);
149	#endif
150
151	static int show_cpuinfo(struct seq_file m, void v)
152	{
153	unsigned long cpu_id = (unsigned long)v - 1;
154	unsigned int pvr;
155	unsigned short maj;
156	unsigned short min;
157
158	if (cpu_id == NR_CPUS) {
159	#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
160	unsigned long bogosum = 0;
161	int i;
162	for (i = 0; i < NR_CPUS; ++i)
163	if (cpu_online(i))
164	bogosum += loops_per_jiffy;
165	seq_printf(m, "total bogomips\t: %lu.%02lu\n",
166	bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
167	#endif /* CONFIG_SMP && CONFIG_PPC32 */
168	seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
169
170	if (ppc_md.show_cpuinfo != NULL)
171	ppc_md.show_cpuinfo(m);
172
173	return 0;
174	}
175
176	/* We only show online cpus: disable preempt (overzealous, I
177	* knew) to prevent cpu going down. */
178	preempt_disable();
179	if (!cpu_online(cpu_id)) {
180	preempt_enable();
181	return 0;
182	}
183
184	#ifdef CONFIG_SMP
03501dab	185	pvr = per_cpu(pvr, cpu_id);
03501dab PM	186	#else
	187	pvr = mfspr(SPRN_PVR);
	188	#endif
	189	maj = (pvr >> 8) & 0xFF;
	190	min = pvr & 0xFF;
	191
	192	seq_printf(m, "processor\t: %lu\n", cpu_id);
	193	seq_printf(m, "cpu\t\t: ");
	194
	195	if (cur_cpu_spec->pvr_mask)
	196	seq_printf(m, "%s", cur_cpu_spec->cpu_name);
	197	else
	198	seq_printf(m, "unknown (%08x)", pvr);
	199
	200	#ifdef CONFIG_ALTIVEC
	201	if (cpu_has_feature(CPU_FTR_ALTIVEC))
	202	seq_printf(m, ", altivec supported");
	203	#endif /* CONFIG_ALTIVEC */
	204
	205	seq_printf(m, "\n");
	206
	207	#ifdef CONFIG_TAU
	208	if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
	209	#ifdef CONFIG_TAU_AVERAGE
	210	/* more straightforward, but potentially misleading */
	211	seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
bccfd588	212	cpu_temp(cpu_id));
03501dab PM	213	#else
	214	/* show the actual temp sensor range */
	215	u32 temp;
bccfd588	216	temp = cpu_temp_both(cpu_id);
03501dab PM	217	seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
	218	temp & 0xff, temp >> 16);
	219	#endif
	220	}
	221	#endif /* CONFIG_TAU */
	222
	223	/*
	224	* Assume here that all clock rates are the same in a
	225	* smp system. -- Cort
	226	*/
	227	if (ppc_proc_freq)
	228	seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
	229	ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
	230
	231	if (ppc_md.show_percpuinfo != NULL)
	232	ppc_md.show_percpuinfo(m, cpu_id);
	233
	234	/* If we are a Freescale core do a simple check so
	235	* we dont have to keep adding cases in the future */
	236	if (PVR_VER(pvr) & 0x8000) {
	237	maj = PVR_MAJ(pvr);
	238	min = PVR_MIN(pvr);
	239	} else {
	240	switch (PVR_VER(pvr)) {
	241	case 0x0020: /* 403 family */
	242	maj = PVR_MAJ(pvr) + 1;
	243	min = PVR_MIN(pvr);
	244	break;
	245	case 0x1008: /* 740P/750P ?? */
	246	maj = ((pvr >> 8) & 0xFF) - 1;
	247	min = pvr & 0xFF;
	248	break;
	249	default:
	250	maj = (pvr >> 8) & 0xFF;
	251	min = pvr & 0xFF;
	252	break;
	253	}
	254	}
	255
	256	seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
	257	maj, min, PVR_VER(pvr), PVR_REV(pvr));
	258
	259	#ifdef CONFIG_PPC32
	260	seq_printf(m, "bogomips\t: %lu.%02lu\n",
	261	loops_per_jiffy / (500000/HZ),
	262	(loops_per_jiffy / (5000/HZ)) % 100);
	263	#endif
	264
	265	#ifdef CONFIG_SMP
	266	seq_printf(m, "\n");
	267	#endif
	268
	269	preempt_enable();
	270	return 0;
	271	}
	272
	273	static void c_start(struct seq_file m, loff_t *pos)
	274	{
	275	unsigned long i = *pos;
	276
	277	return i <= NR_CPUS ? (void *)(i + 1) : NULL;
	278	}
	279
	280	static void c_next(struct seq_file m, void v, loff_t pos)
281	{
282	++*pos;
283	return c_start(m, pos);
284	}
285
286	static void c_stop(struct seq_file m, void v)
287	{
288	}
289
290	struct seq_operations cpuinfo_op = {
291	.start =c_start,
292	.next = c_next,
293	.stop = c_stop,
294	.show = show_cpuinfo,
295	};
296
297	#ifdef CONFIG_PPC_MULTIPLATFORM
298	static int __init set_preferred_console(void)
299	{
300	struct device_node *prom_stdout = NULL;
301	char *name;
302	u32 *spd;
303	int offset = 0;
304
305	DBG(" -> set_preferred_console()\n");
306
307	/* The user has requested a console so this is already set up. */
308	if (strstr(saved_command_line, "console=")) {
309	DBG(" console was specified !\n");
310	return -EBUSY;
311	}
312
313	if (!of_chosen) {
314	DBG(" of_chosen is NULL !\n");
315	return -ENODEV;
316	}
317	/* We are getting a weird phandle from OF ... */
318	/* ... So use the full path instead */
319	name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
320	if (name == NULL) {
321	DBG(" no linux,stdout-path !\n");
322	return -ENODEV;
323	}
324	prom_stdout = of_find_node_by_path(name);
325	if (!prom_stdout) {
326	DBG(" can't find stdout package %s !\n", name);
327	return -ENODEV;
328	}
329	DBG("stdout is %s\n", prom_stdout->full_name);
330
331	name = (char *)get_property(prom_stdout, "name", NULL);
332	if (!name) {
333	DBG(" stdout package has no name !\n");
334	goto not_found;
335	}
336	spd = (u32 *)get_property(prom_stdout, "current-speed", NULL);
337
338	if (0)
339	;
340	#ifdef CONFIG_SERIAL_8250_CONSOLE
341	else if (strcmp(name, "serial") == 0) {
342	int i;
343	u32 reg = (u32 )get_property(prom_stdout, "reg", &i);
344	if (i > 8) {
345	switch (reg[1]) {
346	case 0x3f8:
347	offset = 0;
348	break;
349	case 0x2f8:
350	offset = 1;
351	break;
352	case 0x898:
353	offset = 2;
354	break;
355	case 0x890:
356	offset = 3;
357	break;
358	default:
359	/* We dont recognise the serial port */
360	goto not_found;
361	}
362	}
363	}
364	#endif /* CONFIG_SERIAL_8250_CONSOLE */
365	#ifdef CONFIG_PPC_PSERIES
366	else if (strcmp(name, "vty") == 0) {
367	u32 reg = (u32 )get_property(prom_stdout, "reg", NULL);
368	char compat = (char )get_property(prom_stdout, "compatible", NULL);
369
370	if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) {
371	/* Host Virtual Serial Interface */
03501dab PM	372	switch (reg[0]) {
	373	case 0x30000000:
	374	offset = 0;
	375	break;
	376	case 0x30000001:
	377	offset = 1;
	378	break;
	379	default:
	380	goto not_found;
	381	}
	382	of_node_put(prom_stdout);
	383	DBG("Found hvsi console at offset %d\n", offset);
	384	return add_preferred_console("hvsi", offset, NULL);
	385	} else {
	386	/* pSeries LPAR virtual console */
	387	of_node_put(prom_stdout);
	388	DBG("Found hvc console\n");
	389	return add_preferred_console("hvc", 0, NULL);
	390	}
	391	}
	392	#endif /* CONFIG_PPC_PSERIES */
	393	#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
	394	else if (strcmp(name, "ch-a") == 0)
	395	offset = 0;
	396	else if (strcmp(name, "ch-b") == 0)
	397	offset = 1;
	398	#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
	399	else
	400	goto not_found;
	401	of_node_put(prom_stdout);
	402
	403	DBG("Found serial console at ttyS%d\n", offset);
	404
	405	if (spd) {
	406	static char __initdata opt[16];
	407	sprintf(opt, "%d", *spd);
	408	return add_preferred_console("ttyS", offset, opt);
	409	} else
	410	return add_preferred_console("ttyS", offset, NULL);
	411
	412	not_found:
	413	DBG("No preferred console found !\n");
	414	of_node_put(prom_stdout);
	415	return -ENODEV;
	416	}
	417	console_initcall(set_preferred_console);
	418	#endif /* CONFIG_PPC_MULTIPLATFORM */
5ad57078	419
a82765b6 DW	420	void __init check_for_initrd(void)
	421	{
	422	#ifdef CONFIG_BLK_DEV_INITRD
	423	unsigned long *prop;
	424
	425	DBG(" -> check_for_initrd()\n");
	426
	427	if (of_chosen) {
	428	prop = (unsigned long *)get_property(of_chosen,
	429	"linux,initrd-start", NULL);
	430	if (prop != NULL) {
	431	initrd_start = (unsigned long)__va(*prop);
	432	prop = (unsigned long *)get_property(of_chosen,
	433	"linux,initrd-end", NULL);
	434	if (prop != NULL) {
	435	initrd_end = (unsigned long)__va(*prop);
	436	initrd_below_start_ok = 1;
	437	} else
	438	initrd_start = 0;
	439	}
	440	}
	441
	442	/* If we were passed an initrd, set the ROOT_DEV properly if the values
	443	* look sensible. If not, clear initrd reference.
	444	*/
	445	if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
	446	initrd_end > initrd_start)
	447	ROOT_DEV = Root_RAM0;
6761c4a0	448	else
a82765b6	449	initrd_start = initrd_end = 0;
a82765b6 DW	450
	451	if (initrd_start)
	452	printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
	453
	454	DBG(" <- check_for_initrd()\n");
	455	#endif /* CONFIG_BLK_DEV_INITRD */
	456	}
	457
5ad57078 PM	458	#ifdef CONFIG_SMP
	459
	460	/**
	461	* setup_cpu_maps - initialize the following cpu maps:
	462	* cpu_possible_map
	463	* cpu_present_map
	464	* cpu_sibling_map
	465	*
	466	* Having the possible map set up early allows us to restrict allocations
	467	* of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
	468	*
	469	* We do not initialize the online map here; cpus set their own bits in
	470	* cpu_online_map as they come up.
	471	*
	472	* This function is valid only for Open Firmware systems. finish_device_tree
	473	* must be called before using this.
	474	*
	475	* While we're here, we may as well set the "physical" cpu ids in the paca.
	476	*/
	477	void __init smp_setup_cpu_maps(void)
	478	{
	479	struct device_node *dn = NULL;
	480	int cpu = 0;
	481	int swap_cpuid = 0;
	482
	483	while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
	484	int *intserv;
	485	int j, len = sizeof(u32), nthreads = 1;
	486
	487	intserv = (int *)get_property(dn, "ibm,ppc-interrupt-server#s",
	488	&len);
	489	if (intserv)
	490	nthreads = len / sizeof(int);
	491	else {
	492	intserv = (int *) get_property(dn, "reg", NULL);
	493	if (!intserv)
	494	intserv = &cpu; /* assume logical == phys */
	495	}
	496
	497	for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
	498	cpu_set(cpu, cpu_present_map);
	499	set_hard_smp_processor_id(cpu, intserv[j]);
	500
	501	if (intserv[j] == boot_cpuid_phys)
	502	swap_cpuid = cpu;
	503	cpu_set(cpu, cpu_possible_map);
	504	cpu++;
	505	}
	506	}
	507
	508	/* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
	509	* boot cpu is logical 0.
	510	*/
	511	if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
	512	u32 tmp;
	513	tmp = get_hard_smp_processor_id(0);
	514	set_hard_smp_processor_id(0, boot_cpuid_phys);
	515	set_hard_smp_processor_id(swap_cpuid, tmp);
	516	}
	517
	518	#ifdef CONFIG_PPC64
	519	/*
	520	* On pSeries LPAR, we need to know how many cpus
	521	* could possibly be added to this partition.
522	*/
799d6046 PM	523	if (_machine == PLATFORM_PSERIES_LPAR &&
799d6046 PM	524	(dn = of_find_node_by_path("/rtas"))) {
5ad57078 PM	525	int num_addr_cell, num_size_cell, maxcpus;
	526	unsigned int *ireg;
	527
	528	num_addr_cell = prom_n_addr_cells(dn);
	529	num_size_cell = prom_n_size_cells(dn);
	530
	531	ireg = (unsigned int *)
	532	get_property(dn, "ibm,lrdr-capacity", NULL);
	533
	534	if (!ireg)
	535	goto out;
	536
	537	maxcpus = ireg[num_addr_cell + num_size_cell];
	538
	539	/* Double maxcpus for processors which have SMT capability */
	540	if (cpu_has_feature(CPU_FTR_SMT))
	541	maxcpus *= 2;
	542
	543	if (maxcpus > NR_CPUS) {
	544	printk(KERN_WARNING
	545	"Partition configured for %d cpus, "
	546	"operating system maximum is %d.\n",
	547	maxcpus, NR_CPUS);
	548	maxcpus = NR_CPUS;
	549	} else
	550	printk(KERN_INFO "Partition configured for %d cpus.\n",
	551	maxcpus);
	552
	553	for (cpu = 0; cpu < maxcpus; cpu++)
	554	cpu_set(cpu, cpu_possible_map);
	555	out:
	556	of_node_put(dn);
	557	}
	558
	559	/*
	560	* Do the sibling map; assume only two threads per processor.
	561	*/
	562	for_each_cpu(cpu) {
	563	cpu_set(cpu, cpu_sibling_map[cpu]);
	564	if (cpu_has_feature(CPU_FTR_SMT))
	565	cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
	566	}
	567
a7f290da	568	vdso_data->processorCount = num_present_cpus();
5ad57078 PM	569	#endif /* CONFIG_PPC64 */
	570	}
	571	#endif /* CONFIG_SMP */
fca5dcd4 PM	572
	573	#ifdef CONFIG_XMON
	574	static int __init early_xmon(char *p)
	575	{
	576	/* ensure xmon is enabled */
	577	if (p) {
	578	if (strncmp(p, "on", 2) == 0)
	579	xmon_init(1);
	580	if (strncmp(p, "off", 3) == 0)
	581	xmon_init(0);
	582	if (strncmp(p, "early", 5) != 0)
	583	return 0;
	584	}
	585	xmon_init(1);
	586	debugger(NULL);
	587
	588	return 0;
	589	}
	590	early_param("xmon", early_xmon);
	591	#endif