[deliverable/linux.git] / arch / sparc / kernel / smp.c

/* smp.c: Sparc SMP support.
 *
 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 2004 Keith M Wesolowski (wesolows@foobazco.org)
 */

#include <asm/head.h>

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/threads.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/cache.h>
#include <linux/delay.h>

#include <asm/ptrace.h>
#include <asm/atomic.h>

#include <asm/irq.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/oplib.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/cpudata.h>

#include "irq.h"

volatile unsigned long cpu_callin_map[NR_CPUS] __cpuinitdata = {0,};
unsigned char boot_cpu_id = 0;
unsigned char boot_cpu_id4 = 0; /* boot_cpu_id << 2 */

cpumask_t cpu_online_map = CPU_MASK_NONE;
cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
cpumask_t smp_commenced_mask = CPU_MASK_NONE;

/* The only guaranteed locking primitive available on all Sparc
 * processors is 'ldstub [%reg + immediate], %dest_reg' which atomically
 * places the current byte at the effective address into dest_reg and
 * places 0xff there afterwards.  Pretty lame locking primitive
 * compared to the Alpha and the Intel no?  Most Sparcs have 'swap'
 * instruction which is much better...
 */

void __cpuinit smp_store_cpu_info(int id)
{
	int cpu_node;

	cpu_data(id).udelay_val = loops_per_jiffy;

	cpu_find_by_mid(id, &cpu_node);
	cpu_data(id).clock_tick = prom_getintdefault(cpu_node,
						     "clock-frequency", 0);
	cpu_data(id).prom_node = cpu_node;
	cpu_data(id).mid = cpu_get_hwmid(cpu_node);

	if (cpu_data(id).mid < 0)
		panic("No MID found for CPU%d at node 0x%08d", id, cpu_node);
}

void __init smp_cpus_done(unsigned int max_cpus)
{
	extern void smp4m_smp_done(void);
	extern void smp4d_smp_done(void);
	unsigned long bogosum = 0;
	int cpu, num;

	for (cpu = 0, num = 0; cpu < NR_CPUS; cpu++)
		if (cpu_online(cpu)) {
			num++;
			bogosum += cpu_data(cpu).udelay_val;
		}

	printk("Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
		num, bogosum/(500000/HZ),
		(bogosum/(5000/HZ))%100);

	switch(sparc_cpu_model) {
	case sun4:
		printk("SUN4\n");
		BUG();
		break;
	case sun4c:
		printk("SUN4C\n");
		BUG();
		break;
	case sun4m:
		smp4m_smp_done();
		break;
	case sun4d:
		smp4d_smp_done();
		break;
	case sun4e:
		printk("SUN4E\n");
		BUG();
		break;
	case sun4u:
		printk("SUN4U\n");
		BUG();
		break;
	default:
		printk("UNKNOWN!\n");
		BUG();
		break;
	};
}

void cpu_panic(void)
{
	printk("CPU[%d]: Returns from cpu_idle!\n", smp_processor_id());
	panic("SMP bolixed\n");
}

struct linux_prom_registers smp_penguin_ctable __cpuinitdata = { 0 };

void smp_send_reschedule(int cpu)
{
	/* See sparc64 */
}

void smp_send_stop(void)
{
}

void smp_flush_cache_all(void)
{
	xc0((smpfunc_t) BTFIXUP_CALL(local_flush_cache_all));
	local_flush_cache_all();
}

void smp_flush_tlb_all(void)
{
	xc0((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_all));
	local_flush_tlb_all();
}

void smp_flush_cache_mm(struct mm_struct *mm)
{
	if(mm->context != NO_CONTEXT) {
		cpumask_t cpu_mask = mm->cpu_vm_mask;
		cpu_clear(smp_processor_id(), cpu_mask);
		if (!cpus_empty(cpu_mask))
			xc1((smpfunc_t) BTFIXUP_CALL(local_flush_cache_mm), (unsigned long) mm);
		local_flush_cache_mm(mm);
	}
}

void smp_flush_tlb_mm(struct mm_struct *mm)
{
	if(mm->context != NO_CONTEXT) {
		cpumask_t cpu_mask = mm->cpu_vm_mask;
		cpu_clear(smp_processor_id(), cpu_mask);
		if (!cpus_empty(cpu_mask)) {
			xc1((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_mm), (unsigned long) mm);
			if(atomic_read(&mm->mm_users) == 1 && current->active_mm == mm)
				mm->cpu_vm_mask = cpumask_of_cpu(smp_processor_id());
		}
		local_flush_tlb_mm(mm);
	}
}

void smp_flush_cache_range(struct vm_area_struct *vma, unsigned long start,
			   unsigned long end)
{
	struct mm_struct *mm = vma->vm_mm;

	if (mm->context != NO_CONTEXT) {
		cpumask_t cpu_mask = mm->cpu_vm_mask;
		cpu_clear(smp_processor_id(), cpu_mask);
		if (!cpus_empty(cpu_mask))
			xc3((smpfunc_t) BTFIXUP_CALL(local_flush_cache_range), (unsigned long) vma, start, end);
		local_flush_cache_range(vma, start, end);
	}
}

void smp_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
			 unsigned long end)
{
	struct mm_struct *mm = vma->vm_mm;

	if (mm->context != NO_CONTEXT) {
		cpumask_t cpu_mask = mm->cpu_vm_mask;
		cpu_clear(smp_processor_id(), cpu_mask);
		if (!cpus_empty(cpu_mask))
			xc3((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_range), (unsigned long) vma, start, end);
		local_flush_tlb_range(vma, start, end);
	}
}

void smp_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
{
	struct mm_struct *mm = vma->vm_mm;

	if(mm->context != NO_CONTEXT) {
		cpumask_t cpu_mask = mm->cpu_vm_mask;
		cpu_clear(smp_processor_id(), cpu_mask);
		if (!cpus_empty(cpu_mask))
			xc2((smpfunc_t) BTFIXUP_CALL(local_flush_cache_page), (unsigned long) vma, page);
		local_flush_cache_page(vma, page);
	}
}

void smp_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
{
	struct mm_struct *mm = vma->vm_mm;

	if(mm->context != NO_CONTEXT) {
		cpumask_t cpu_mask = mm->cpu_vm_mask;
		cpu_clear(smp_processor_id(), cpu_mask);
		if (!cpus_empty(cpu_mask))
			xc2((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_page), (unsigned long) vma, page);
		local_flush_tlb_page(vma, page);
	}
}

void smp_reschedule_irq(void)
{
	set_need_resched();
}

void smp_flush_page_to_ram(unsigned long page)
{
	/* Current theory is that those who call this are the one's
	 * who have just dirtied their cache with the pages contents
	 * in kernel space, therefore we only run this on local cpu.
	 *
	 * XXX This experiment failed, research further... -DaveM
	 */
#if 1
	xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_to_ram), page);
#endif
	local_flush_page_to_ram(page);
}

void smp_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
{
	cpumask_t cpu_mask = mm->cpu_vm_mask;
	cpu_clear(smp_processor_id(), cpu_mask);
	if (!cpus_empty(cpu_mask))
		xc2((smpfunc_t) BTFIXUP_CALL(local_flush_sig_insns), (unsigned long) mm, insn_addr);
	local_flush_sig_insns(mm, insn_addr);
}

extern unsigned int lvl14_resolution;

/* /proc/profile writes can call this, don't __init it please. */
static DEFINE_SPINLOCK(prof_setup_lock);

int setup_profiling_timer(unsigned int multiplier)
{
	int i;
	unsigned long flags;

	/* Prevent level14 ticker IRQ flooding. */
	if((!multiplier) || (lvl14_resolution / multiplier) < 500)
		return -EINVAL;

	spin_lock_irqsave(&prof_setup_lock, flags);
	for_each_possible_cpu(i) {
		load_profile_irq(i, lvl14_resolution / multiplier);
		prof_multiplier(i) = multiplier;
	}
	spin_unlock_irqrestore(&prof_setup_lock, flags);

	return 0;
}

void __init smp_prepare_cpus(unsigned int max_cpus)
{
	extern void __init smp4m_boot_cpus(void);
	extern void __init smp4d_boot_cpus(void);
	int i, cpuid, extra;

	printk("Entering SMP Mode...\n");

	extra = 0;
	for (i = 0; !cpu_find_by_instance(i, NULL, &cpuid); i++) {
		if (cpuid >= NR_CPUS)
			extra++;
	}
	/* i = number of cpus */
	if (extra && max_cpus > i - extra)
		printk("Warning: NR_CPUS is too low to start all cpus\n");

	smp_store_cpu_info(boot_cpu_id);

	switch(sparc_cpu_model) {
	case sun4:
		printk("SUN4\n");
		BUG();
		break;
	case sun4c:
		printk("SUN4C\n");
		BUG();
		break;
	case sun4m:
		smp4m_boot_cpus();
		break;
	case sun4d:
		smp4d_boot_cpus();
		break;
	case sun4e:
		printk("SUN4E\n");
		BUG();
		break;
	case sun4u:
		printk("SUN4U\n");
		BUG();
		break;
	default:
		printk("UNKNOWN!\n");
		BUG();
		break;
	};
}

/* Set this up early so that things like the scheduler can init
 * properly.  We use the same cpu mask for both the present and
 * possible cpu map.
 */
void __init smp_setup_cpu_possible_map(void)
{
	int instance, mid;

	instance = 0;
	while (!cpu_find_by_instance(instance, NULL, &mid)) {
		if (mid < NR_CPUS) {
			cpu_set(mid, phys_cpu_present_map);
			cpu_set(mid, cpu_present_map);
		}
		instance++;
	}
}

void __init smp_prepare_boot_cpu(void)
{
	int cpuid = hard_smp_processor_id();

	if (cpuid >= NR_CPUS) {
		prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
		prom_halt();
	}
	if (cpuid != 0)
		printk("boot cpu id != 0, this could work but is untested\n");

	current_thread_info()->cpu = cpuid;
	cpu_set(cpuid, cpu_online_map);
	cpu_set(cpuid, phys_cpu_present_map);
}

int __cpuinit __cpu_up(unsigned int cpu)
{
	extern int __cpuinit smp4m_boot_one_cpu(int);
	extern int __cpuinit smp4d_boot_one_cpu(int);
	int ret=0;

	switch(sparc_cpu_model) {
	case sun4:
		printk("SUN4\n");
		BUG();
		break;
	case sun4c:
		printk("SUN4C\n");
		BUG();
		break;
	case sun4m:
		ret = smp4m_boot_one_cpu(cpu);
		break;
	case sun4d:
		ret = smp4d_boot_one_cpu(cpu);
		break;
	case sun4e:
		printk("SUN4E\n");
		BUG();
		break;
	case sun4u:
		printk("SUN4U\n");
		BUG();
		break;
	default:
		printk("UNKNOWN!\n");
		BUG();
		break;
	};

	if (!ret) {
		cpu_set(cpu, smp_commenced_mask);
		while (!cpu_online(cpu))
			mb();
	}
	return ret;
}

void smp_bogo(struct seq_file *m)
{
	int i;
	
	for_each_online_cpu(i) {
		seq_printf(m,
			   "Cpu%dBogo\t: %lu.%02lu\n",
			   i,
			   cpu_data(i).udelay_val/(500000/HZ),
			   (cpu_data(i).udelay_val/(5000/HZ))%100);
	}
}

void smp_info(struct seq_file *m)
{
	int i;

	seq_printf(m, "State:\n");
	for_each_online_cpu(i)
		seq_printf(m, "CPU%d\t\t: online\n", i);
}
Commit	Line	Data
1da177e4 LT	1	/* smp.c: Sparc SMP support.
	2	*
	3	* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
	4	* Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
	5	* Copyright (C) 2004 Keith M Wesolowski (wesolows@foobazco.org)
	6	*/
	7
	8	#include <asm/head.h>
	9
	10	#include <linux/kernel.h>
	11	#include <linux/sched.h>
	12	#include <linux/threads.h>
	13	#include <linux/smp.h>
1da177e4 LT	14	#include <linux/interrupt.h>
	15	#include <linux/kernel_stat.h>
	16	#include <linux/init.h>
	17	#include <linux/spinlock.h>
	18	#include <linux/mm.h>
	19	#include <linux/fs.h>
	20	#include <linux/seq_file.h>
	21	#include <linux/cache.h>
	22	#include <linux/delay.h>
	23
	24	#include <asm/ptrace.h>
	25	#include <asm/atomic.h>
	26
	27	#include <asm/irq.h>
	28	#include <asm/page.h>
	29	#include <asm/pgalloc.h>
	30	#include <asm/pgtable.h>
	31	#include <asm/oplib.h>
	32	#include <asm/cacheflush.h>
	33	#include <asm/tlbflush.h>
	34	#include <asm/cpudata.h>
	35
32231a66 AV	36	#include "irq.h"
32231a66 AV	37
409832f5	38	volatile unsigned long cpu_callin_map[NR_CPUS] __cpuinitdata = {0,};
1da177e4 LT	39	unsigned char boot_cpu_id = 0;
1da177e4 LT	40	unsigned char boot_cpu_id4 = 0; /* boot_cpu_id << 2 */
1da177e4 LT	41
	42	cpumask_t cpu_online_map = CPU_MASK_NONE;
	43	cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
a54123e2	44	cpumask_t smp_commenced_mask = CPU_MASK_NONE;
1da177e4 LT	45
	46	/* The only guaranteed locking primitive available on all Sparc
	47	* processors is 'ldstub [%reg + immediate], %dest_reg' which atomically
	48	* places the current byte at the effective address into dest_reg and
	49	* places 0xff there afterwards. Pretty lame locking primitive
	50	* compared to the Alpha and the Intel no? Most Sparcs have 'swap'
	51	* instruction which is much better...
	52	*/
	53
92d452f0	54	void __cpuinit smp_store_cpu_info(int id)
1da177e4 LT	55	{
	56	int cpu_node;
	57
	58	cpu_data(id).udelay_val = loops_per_jiffy;
	59
	60	cpu_find_by_mid(id, &cpu_node);
	61	cpu_data(id).clock_tick = prom_getintdefault(cpu_node,
	62	"clock-frequency", 0);
	63	cpu_data(id).prom_node = cpu_node;
	64	cpu_data(id).mid = cpu_get_hwmid(cpu_node);
650fb838	65
1da177e4 LT	66	if (cpu_data(id).mid < 0)
	67	panic("No MID found for CPU%d at node 0x%08d", id, cpu_node);
	68	}
	69
	70	void __init smp_cpus_done(unsigned int max_cpus)
	71	{
a54123e2	72	extern void smp4m_smp_done(void);
8b3c848c	73	extern void smp4d_smp_done(void);
a54123e2 BB	74	unsigned long bogosum = 0;
	75	int cpu, num;
	76
	77	for (cpu = 0, num = 0; cpu < NR_CPUS; cpu++)
	78	if (cpu_online(cpu)) {
	79	num++;
	80	bogosum += cpu_data(cpu).udelay_val;
	81	}
	82
	83	printk("Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
	84	num, bogosum/(500000/HZ),
	85	(bogosum/(5000/HZ))%100);
	86
8b3c848c RB	87	switch(sparc_cpu_model) {
	88	case sun4:
	89	printk("SUN4\n");
	90	BUG();
	91	break;
	92	case sun4c:
	93	printk("SUN4C\n");
	94	BUG();
	95	break;
	96	case sun4m:
	97	smp4m_smp_done();
	98	break;
	99	case sun4d:
	100	smp4d_smp_done();
	101	break;
	102	case sun4e:
	103	printk("SUN4E\n");
	104	BUG();
	105	break;
	106	case sun4u:
	107	printk("SUN4U\n");
	108	BUG();
	109	break;
	110	default:
	111	printk("UNKNOWN!\n");
	112	BUG();
	113	break;
	114	};
1da177e4 LT	115	}
	116
	117	void cpu_panic(void)
	118	{
	119	printk("CPU[%d]: Returns from cpu_idle!\n", smp_processor_id());
	120	panic("SMP bolixed\n");
	121	}
	122
409832f5	123	struct linux_prom_registers smp_penguin_ctable __cpuinitdata = { 0 };
1da177e4	124
1da177e4 LT	125	void smp_send_reschedule(int cpu)
	126	{
	127	/* See sparc64 */
	128	}
	129
	130	void smp_send_stop(void)
	131	{
	132	}
	133
	134	void smp_flush_cache_all(void)
	135	{
	136	xc0((smpfunc_t) BTFIXUP_CALL(local_flush_cache_all));
	137	local_flush_cache_all();
	138	}
	139
	140	void smp_flush_tlb_all(void)
	141	{
	142	xc0((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_all));
	143	local_flush_tlb_all();
	144	}
	145
	146	void smp_flush_cache_mm(struct mm_struct *mm)
	147	{
	148	if(mm->context != NO_CONTEXT) {
	149	cpumask_t cpu_mask = mm->cpu_vm_mask;
	150	cpu_clear(smp_processor_id(), cpu_mask);
	151	if (!cpus_empty(cpu_mask))
	152	xc1((smpfunc_t) BTFIXUP_CALL(local_flush_cache_mm), (unsigned long) mm);
	153	local_flush_cache_mm(mm);
	154	}
	155	}
	156
	157	void smp_flush_tlb_mm(struct mm_struct *mm)
	158	{
	159	if(mm->context != NO_CONTEXT) {
	160	cpumask_t cpu_mask = mm->cpu_vm_mask;
	161	cpu_clear(smp_processor_id(), cpu_mask);
	162	if (!cpus_empty(cpu_mask)) {
	163	xc1((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_mm), (unsigned long) mm);
	164	if(atomic_read(&mm->mm_users) == 1 && current->active_mm == mm)
	165	mm->cpu_vm_mask = cpumask_of_cpu(smp_processor_id());
	166	}
	167	local_flush_tlb_mm(mm);
	168	}
	169	}
	170
	171	void smp_flush_cache_range(struct vm_area_struct *vma, unsigned long start,
	172	unsigned long end)
	173	{
	174	struct mm_struct *mm = vma->vm_mm;
	175
	176	if (mm->context != NO_CONTEXT) {
	177	cpumask_t cpu_mask = mm->cpu_vm_mask;
	178	cpu_clear(smp_processor_id(), cpu_mask);
	179	if (!cpus_empty(cpu_mask))
	180	xc3((smpfunc_t) BTFIXUP_CALL(local_flush_cache_range), (unsigned long) vma, start, end);
	181	local_flush_cache_range(vma, start, end);
	182	}
	183	}
	184
	185	void smp_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
	186	unsigned long end)
	187	{
	188	struct mm_struct *mm = vma->vm_mm;
189
190	if (mm->context != NO_CONTEXT) {
191	cpumask_t cpu_mask = mm->cpu_vm_mask;
192	cpu_clear(smp_processor_id(), cpu_mask);
193	if (!cpus_empty(cpu_mask))
194	xc3((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_range), (unsigned long) vma, start, end);
195	local_flush_tlb_range(vma, start, end);
196	}
197	}
198
199	void smp_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
200	{
201	struct mm_struct *mm = vma->vm_mm;
202
203	if(mm->context != NO_CONTEXT) {
204	cpumask_t cpu_mask = mm->cpu_vm_mask;
205	cpu_clear(smp_processor_id(), cpu_mask);
206	if (!cpus_empty(cpu_mask))
207	xc2((smpfunc_t) BTFIXUP_CALL(local_flush_cache_page), (unsigned long) vma, page);
208	local_flush_cache_page(vma, page);
209	}
210	}
211
212	void smp_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
213	{
214	struct mm_struct *mm = vma->vm_mm;
215
216	if(mm->context != NO_CONTEXT) {
217	cpumask_t cpu_mask = mm->cpu_vm_mask;
218	cpu_clear(smp_processor_id(), cpu_mask);
219	if (!cpus_empty(cpu_mask))
220	xc2((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_page), (unsigned long) vma, page);
221	local_flush_tlb_page(vma, page);
222	}
223	}
224
225	void smp_reschedule_irq(void)
226	{
227	set_need_resched();
228	}
229
230	void smp_flush_page_to_ram(unsigned long page)
231	{
232	/* Current theory is that those who call this are the one's
233	* who have just dirtied their cache with the pages contents
234	* in kernel space, therefore we only run this on local cpu.
235	*
236	* XXX This experiment failed, research further... -DaveM
237	*/
238	#if 1
239	xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_to_ram), page);
240	#endif
241	local_flush_page_to_ram(page);
242	}
243
244	void smp_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
245	{
246	cpumask_t cpu_mask = mm->cpu_vm_mask;
247	cpu_clear(smp_processor_id(), cpu_mask);
248	if (!cpus_empty(cpu_mask))
249	xc2((smpfunc_t) BTFIXUP_CALL(local_flush_sig_insns), (unsigned long) mm, insn_addr);
250	local_flush_sig_insns(mm, insn_addr);
251	}
252
253	extern unsigned int lvl14_resolution;
254
255	/* /proc/profile writes can call this, don't __init it please. */
256	static DEFINE_SPINLOCK(prof_setup_lock);
257
258	int setup_profiling_timer(unsigned int multiplier)
259	{
260	int i;
261	unsigned long flags;
262
263	/* Prevent level14 ticker IRQ flooding. */
264	if((!multiplier) \|\| (lvl14_resolution / multiplier) < 500)
265	return -EINVAL;
266
267	spin_lock_irqsave(&prof_setup_lock, flags);
fff8efe7	268	for_each_possible_cpu(i) {
394e3902	269	load_profile_irq(i, lvl14_resolution / multiplier);
1da177e4 LT	270	prof_multiplier(i) = multiplier;
	271	}
	272	spin_unlock_irqrestore(&prof_setup_lock, flags);
	273
	274	return 0;
	275	}
	276
a54123e2	277	void __init smp_prepare_cpus(unsigned int max_cpus)
1da177e4	278	{
b4cff846 AV	279	extern void __init smp4m_boot_cpus(void);
b4cff846 AV	280	extern void __init smp4d_boot_cpus(void);
7202fb49	281	int i, cpuid, extra;
a54123e2	282
a54123e2 BB	283	printk("Entering SMP Mode...\n");
a54123e2 BB	284
a54123e2 BB	285	extra = 0;
a54123e2 BB	286	for (i = 0; !cpu_find_by_instance(i, NULL, &cpuid); i++) {
7202fb49	287	if (cpuid >= NR_CPUS)
a54123e2 BB	288	extra++;
a54123e2 BB	289	}
7202fb49 BB	290	/* i = number of cpus */
7202fb49 BB	291	if (extra && max_cpus > i - extra)
a54123e2 BB	292	printk("Warning: NR_CPUS is too low to start all cpus\n");
	293
	294	smp_store_cpu_info(boot_cpu_id);
	295
8b3c848c RB	296	switch(sparc_cpu_model) {
	297	case sun4:
	298	printk("SUN4\n");
	299	BUG();
	300	break;
	301	case sun4c:
	302	printk("SUN4C\n");
	303	BUG();
	304	break;
	305	case sun4m:
	306	smp4m_boot_cpus();
	307	break;
	308	case sun4d:
	309	smp4d_boot_cpus();
	310	break;
	311	case sun4e:
	312	printk("SUN4E\n");
	313	BUG();
	314	break;
	315	case sun4u:
	316	printk("SUN4U\n");
	317	BUG();
	318	break;
	319	default:
	320	printk("UNKNOWN!\n");
	321	BUG();
	322	break;
	323	};
1da177e4 LT	324	}
1da177e4 LT	325
7202fb49 BB	326	/* Set this up early so that things like the scheduler can init
	327	* properly. We use the same cpu mask for both the present and
	328	* possible cpu map.
	329	*/
	330	void __init smp_setup_cpu_possible_map(void)
	331	{
	332	int instance, mid;
	333
	334	instance = 0;
	335	while (!cpu_find_by_instance(instance, NULL, &mid)) {
	336	if (mid < NR_CPUS) {
	337	cpu_set(mid, phys_cpu_present_map);
	338	cpu_set(mid, cpu_present_map);
	339	}
	340	instance++;
	341	}
	342	}
	343
92d452f0	344	void __init smp_prepare_boot_cpu(void)
1da177e4	345	{
a54123e2 BB	346	int cpuid = hard_smp_processor_id();
	347
	348	if (cpuid >= NR_CPUS) {
	349	prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
	350	prom_halt();
	351	}
	352	if (cpuid != 0)
	353	printk("boot cpu id != 0, this could work but is untested\n");
	354
	355	current_thread_info()->cpu = cpuid;
	356	cpu_set(cpuid, cpu_online_map);
	357	cpu_set(cpuid, phys_cpu_present_map);
1da177e4 LT	358	}
1da177e4 LT	359
92d452f0	360	int __cpuinit __cpu_up(unsigned int cpu)
1da177e4	361	{
b4cff846 AV	362	extern int __cpuinit smp4m_boot_one_cpu(int);
b4cff846 AV	363	extern int __cpuinit smp4d_boot_one_cpu(int);
8b3c848c RB	364	int ret=0;
	365
	366	switch(sparc_cpu_model) {
	367	case sun4:
	368	printk("SUN4\n");
	369	BUG();
	370	break;
	371	case sun4c:
	372	printk("SUN4C\n");
	373	BUG();
	374	break;
	375	case sun4m:
	376	ret = smp4m_boot_one_cpu(cpu);
	377	break;
	378	case sun4d:
	379	ret = smp4d_boot_one_cpu(cpu);
	380	break;
	381	case sun4e:
	382	printk("SUN4E\n");
	383	BUG();
	384	break;
	385	case sun4u:
	386	printk("SUN4U\n");
	387	BUG();
	388	break;
	389	default:
	390	printk("UNKNOWN!\n");
	391	BUG();
	392	break;
	393	};
a54123e2 BB	394
	395	if (!ret) {
	396	cpu_set(cpu, smp_commenced_mask);
	397	while (!cpu_online(cpu))
	398	mb();
	399	}
	400	return ret;
1da177e4 LT	401	}
	402
	403	void smp_bogo(struct seq_file *m)
	404	{
	405	int i;
	406
394e3902 AM	407	for_each_online_cpu(i) {
	408	seq_printf(m,
	409	"Cpu%dBogo\t: %lu.%02lu\n",
	410	i,
	411	cpu_data(i).udelay_val/(500000/HZ),
	412	(cpu_data(i).udelay_val/(5000/HZ))%100);
1da177e4 LT	413	}
	414	}
	415
	416	void smp_info(struct seq_file *m)
	417	{
	418	int i;
	419
	420	seq_printf(m, "State:\n");
394e3902 AM	421	for_each_online_cpu(i)
394e3902 AM	422	seq_printf(m, "CPU%d\t\t: online\n", i);
1da177e4	423	}