[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"

int smp_num_cpus = 1;
volatile unsigned long cpu_callin_map[NR_CPUS] __initdata = {0,};
unsigned char boot_cpu_id = 0;
unsigned char boot_cpu_id4 = 0; /* boot_cpu_id << 2 */
int smp_activated = 0;
volatile int __cpu_number_map[NR_CPUS];
volatile int __cpu_logical_map[NR_CPUS];

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...
 */

/* Used to make bitops atomic */
unsigned char bitops_spinlock = 0;

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 __initdata = { 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
1da177e4 LT	38	int smp_num_cpus = 1;
	39	volatile unsigned long cpu_callin_map[NR_CPUS] __initdata = {0,};
	40	unsigned char boot_cpu_id = 0;
	41	unsigned char boot_cpu_id4 = 0; /* boot_cpu_id << 2 */
	42	int smp_activated = 0;
	43	volatile int __cpu_number_map[NR_CPUS];
	44	volatile int __cpu_logical_map[NR_CPUS];
	45
	46	cpumask_t cpu_online_map = CPU_MASK_NONE;
	47	cpumask_t phys_cpu_present_map = CPU_MASK_NONE;
a54123e2	48	cpumask_t smp_commenced_mask = CPU_MASK_NONE;
1da177e4 LT	49
	50	/* The only guaranteed locking primitive available on all Sparc
	51	* processors is 'ldstub [%reg + immediate], %dest_reg' which atomically
	52	* places the current byte at the effective address into dest_reg and
	53	* places 0xff there afterwards. Pretty lame locking primitive
	54	* compared to the Alpha and the Intel no? Most Sparcs have 'swap'
	55	* instruction which is much better...
	56	*/
	57
	58	/* Used to make bitops atomic */
	59	unsigned char bitops_spinlock = 0;
	60
92d452f0	61	void __cpuinit smp_store_cpu_info(int id)
1da177e4 LT	62	{
	63	int cpu_node;
	64
	65	cpu_data(id).udelay_val = loops_per_jiffy;
	66
	67	cpu_find_by_mid(id, &cpu_node);
	68	cpu_data(id).clock_tick = prom_getintdefault(cpu_node,
	69	"clock-frequency", 0);
	70	cpu_data(id).prom_node = cpu_node;
	71	cpu_data(id).mid = cpu_get_hwmid(cpu_node);
650fb838	72
1da177e4 LT	73	if (cpu_data(id).mid < 0)
	74	panic("No MID found for CPU%d at node 0x%08d", id, cpu_node);
	75	}
	76
	77	void __init smp_cpus_done(unsigned int max_cpus)
	78	{
a54123e2	79	extern void smp4m_smp_done(void);
8b3c848c	80	extern void smp4d_smp_done(void);
a54123e2 BB	81	unsigned long bogosum = 0;
	82	int cpu, num;
	83
	84	for (cpu = 0, num = 0; cpu < NR_CPUS; cpu++)
	85	if (cpu_online(cpu)) {
	86	num++;
	87	bogosum += cpu_data(cpu).udelay_val;
	88	}
	89
	90	printk("Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
	91	num, bogosum/(500000/HZ),
	92	(bogosum/(5000/HZ))%100);
	93
8b3c848c RB	94	switch(sparc_cpu_model) {
	95	case sun4:
	96	printk("SUN4\n");
	97	BUG();
	98	break;
	99	case sun4c:
	100	printk("SUN4C\n");
	101	BUG();
	102	break;
	103	case sun4m:
	104	smp4m_smp_done();
	105	break;
	106	case sun4d:
	107	smp4d_smp_done();
	108	break;
	109	case sun4e:
	110	printk("SUN4E\n");
	111	BUG();
	112	break;
	113	case sun4u:
	114	printk("SUN4U\n");
	115	BUG();
	116	break;
	117	default:
	118	printk("UNKNOWN!\n");
	119	BUG();
	120	break;
	121	};
1da177e4 LT	122	}
	123
	124	void cpu_panic(void)
	125	{
	126	printk("CPU[%d]: Returns from cpu_idle!\n", smp_processor_id());
	127	panic("SMP bolixed\n");
	128	}
	129
	130	struct linux_prom_registers smp_penguin_ctable __initdata = { 0 };
	131
1da177e4 LT	132	void smp_send_reschedule(int cpu)
	133	{
	134	/* See sparc64 */
	135	}
	136
	137	void smp_send_stop(void)
	138	{
	139	}
	140
	141	void smp_flush_cache_all(void)
	142	{
	143	xc0((smpfunc_t) BTFIXUP_CALL(local_flush_cache_all));
	144	local_flush_cache_all();
	145	}
	146
	147	void smp_flush_tlb_all(void)
	148	{
	149	xc0((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_all));
	150	local_flush_tlb_all();
	151	}
	152
	153	void smp_flush_cache_mm(struct mm_struct *mm)
	154	{
	155	if(mm->context != NO_CONTEXT) {
	156	cpumask_t cpu_mask = mm->cpu_vm_mask;
	157	cpu_clear(smp_processor_id(), cpu_mask);
	158	if (!cpus_empty(cpu_mask))
	159	xc1((smpfunc_t) BTFIXUP_CALL(local_flush_cache_mm), (unsigned long) mm);
	160	local_flush_cache_mm(mm);
	161	}
	162	}
	163
	164	void smp_flush_tlb_mm(struct mm_struct *mm)
	165	{
	166	if(mm->context != NO_CONTEXT) {
	167	cpumask_t cpu_mask = mm->cpu_vm_mask;
	168	cpu_clear(smp_processor_id(), cpu_mask);
	169	if (!cpus_empty(cpu_mask)) {
	170	xc1((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_mm), (unsigned long) mm);
	171	if(atomic_read(&mm->mm_users) == 1 && current->active_mm == mm)
	172	mm->cpu_vm_mask = cpumask_of_cpu(smp_processor_id());
	173	}
	174	local_flush_tlb_mm(mm);
	175	}
	176	}
	177
	178	void smp_flush_cache_range(struct vm_area_struct *vma, unsigned long start,
	179	unsigned long end)
	180	{
	181	struct mm_struct *mm = vma->vm_mm;
	182
	183	if (mm->context != NO_CONTEXT) {
	184	cpumask_t cpu_mask = mm->cpu_vm_mask;
	185	cpu_clear(smp_processor_id(), cpu_mask);
	186	if (!cpus_empty(cpu_mask))
	187	xc3((smpfunc_t) BTFIXUP_CALL(local_flush_cache_range), (unsigned long) vma, start, end);
	188	local_flush_cache_range(vma, start, end);
	189	}
	190	}
	191
	192	void smp_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
	193	unsigned long end)
	194	{
	195	struct mm_struct *mm = vma->vm_mm;
196
197	if (mm->context != NO_CONTEXT) {
198	cpumask_t cpu_mask = mm->cpu_vm_mask;
199	cpu_clear(smp_processor_id(), cpu_mask);
200	if (!cpus_empty(cpu_mask))
201	xc3((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_range), (unsigned long) vma, start, end);
202	local_flush_tlb_range(vma, start, end);
203	}
204	}
205
206	void smp_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
207	{
208	struct mm_struct *mm = vma->vm_mm;
209
210	if(mm->context != NO_CONTEXT) {
211	cpumask_t cpu_mask = mm->cpu_vm_mask;
212	cpu_clear(smp_processor_id(), cpu_mask);
213	if (!cpus_empty(cpu_mask))
214	xc2((smpfunc_t) BTFIXUP_CALL(local_flush_cache_page), (unsigned long) vma, page);
215	local_flush_cache_page(vma, page);
216	}
217	}
218
219	void smp_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
220	{
221	struct mm_struct *mm = vma->vm_mm;
222
223	if(mm->context != NO_CONTEXT) {
224	cpumask_t cpu_mask = mm->cpu_vm_mask;
225	cpu_clear(smp_processor_id(), cpu_mask);
226	if (!cpus_empty(cpu_mask))
227	xc2((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_page), (unsigned long) vma, page);
228	local_flush_tlb_page(vma, page);
229	}
230	}
231
232	void smp_reschedule_irq(void)
233	{
234	set_need_resched();
235	}
236
237	void smp_flush_page_to_ram(unsigned long page)
238	{
239	/* Current theory is that those who call this are the one's
240	* who have just dirtied their cache with the pages contents
241	* in kernel space, therefore we only run this on local cpu.
242	*
243	* XXX This experiment failed, research further... -DaveM
244	*/
245	#if 1
246	xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_to_ram), page);
247	#endif
248	local_flush_page_to_ram(page);
249	}
250
251	void smp_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
252	{
253	cpumask_t cpu_mask = mm->cpu_vm_mask;
254	cpu_clear(smp_processor_id(), cpu_mask);
255	if (!cpus_empty(cpu_mask))
256	xc2((smpfunc_t) BTFIXUP_CALL(local_flush_sig_insns), (unsigned long) mm, insn_addr);
257	local_flush_sig_insns(mm, insn_addr);
258	}
259
260	extern unsigned int lvl14_resolution;
261
262	/* /proc/profile writes can call this, don't __init it please. */
263	static DEFINE_SPINLOCK(prof_setup_lock);
264
265	int setup_profiling_timer(unsigned int multiplier)
266	{
267	int i;
268	unsigned long flags;
269
270	/* Prevent level14 ticker IRQ flooding. */
271	if((!multiplier) \|\| (lvl14_resolution / multiplier) < 500)
272	return -EINVAL;
273
274	spin_lock_irqsave(&prof_setup_lock, flags);
fff8efe7	275	for_each_possible_cpu(i) {
394e3902	276	load_profile_irq(i, lvl14_resolution / multiplier);
1da177e4 LT	277	prof_multiplier(i) = multiplier;
	278	}
	279	spin_unlock_irqrestore(&prof_setup_lock, flags);
	280
	281	return 0;
	282	}
	283
a54123e2	284	void __init smp_prepare_cpus(unsigned int max_cpus)
1da177e4	285	{
b4cff846 AV	286	extern void __init smp4m_boot_cpus(void);
b4cff846 AV	287	extern void __init smp4d_boot_cpus(void);
7202fb49	288	int i, cpuid, extra;
a54123e2	289
a54123e2 BB	290	printk("Entering SMP Mode...\n");
a54123e2 BB	291
a54123e2 BB	292	extra = 0;
a54123e2 BB	293	for (i = 0; !cpu_find_by_instance(i, NULL, &cpuid); i++) {
7202fb49	294	if (cpuid >= NR_CPUS)
a54123e2 BB	295	extra++;
a54123e2 BB	296	}
7202fb49 BB	297	/* i = number of cpus */
7202fb49 BB	298	if (extra && max_cpus > i - extra)
a54123e2 BB	299	printk("Warning: NR_CPUS is too low to start all cpus\n");
	300
	301	smp_store_cpu_info(boot_cpu_id);
	302
8b3c848c RB	303	switch(sparc_cpu_model) {
	304	case sun4:
	305	printk("SUN4\n");
	306	BUG();
	307	break;
	308	case sun4c:
	309	printk("SUN4C\n");
	310	BUG();
	311	break;
	312	case sun4m:
	313	smp4m_boot_cpus();
	314	break;
	315	case sun4d:
	316	smp4d_boot_cpus();
	317	break;
	318	case sun4e:
	319	printk("SUN4E\n");
	320	BUG();
	321	break;
	322	case sun4u:
	323	printk("SUN4U\n");
	324	BUG();
	325	break;
	326	default:
	327	printk("UNKNOWN!\n");
	328	BUG();
	329	break;
	330	};
1da177e4 LT	331	}
1da177e4 LT	332
7202fb49 BB	333	/* Set this up early so that things like the scheduler can init
	334	* properly. We use the same cpu mask for both the present and
	335	* possible cpu map.
	336	*/
	337	void __init smp_setup_cpu_possible_map(void)
	338	{
	339	int instance, mid;
	340
	341	instance = 0;
	342	while (!cpu_find_by_instance(instance, NULL, &mid)) {
	343	if (mid < NR_CPUS) {
	344	cpu_set(mid, phys_cpu_present_map);
	345	cpu_set(mid, cpu_present_map);
	346	}
	347	instance++;
	348	}
	349	}
	350
92d452f0	351	void __init smp_prepare_boot_cpu(void)
1da177e4	352	{
a54123e2 BB	353	int cpuid = hard_smp_processor_id();
	354
	355	if (cpuid >= NR_CPUS) {
	356	prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
	357	prom_halt();
	358	}
	359	if (cpuid != 0)
	360	printk("boot cpu id != 0, this could work but is untested\n");
	361
	362	current_thread_info()->cpu = cpuid;
	363	cpu_set(cpuid, cpu_online_map);
	364	cpu_set(cpuid, phys_cpu_present_map);
1da177e4 LT	365	}
1da177e4 LT	366
92d452f0	367	int __cpuinit __cpu_up(unsigned int cpu)
1da177e4	368	{
b4cff846 AV	369	extern int __cpuinit smp4m_boot_one_cpu(int);
b4cff846 AV	370	extern int __cpuinit smp4d_boot_one_cpu(int);
8b3c848c RB	371	int ret=0;
	372
	373	switch(sparc_cpu_model) {
	374	case sun4:
	375	printk("SUN4\n");
	376	BUG();
	377	break;
	378	case sun4c:
	379	printk("SUN4C\n");
	380	BUG();
	381	break;
	382	case sun4m:
	383	ret = smp4m_boot_one_cpu(cpu);
	384	break;
	385	case sun4d:
	386	ret = smp4d_boot_one_cpu(cpu);
	387	break;
	388	case sun4e:
	389	printk("SUN4E\n");
	390	BUG();
	391	break;
	392	case sun4u:
	393	printk("SUN4U\n");
	394	BUG();
	395	break;
	396	default:
	397	printk("UNKNOWN!\n");
	398	BUG();
	399	break;
	400	};
a54123e2 BB	401
	402	if (!ret) {
	403	cpu_set(cpu, smp_commenced_mask);
	404	while (!cpu_online(cpu))
	405	mb();
	406	}
	407	return ret;
1da177e4 LT	408	}
	409
	410	void smp_bogo(struct seq_file *m)
	411	{
	412	int i;
	413
394e3902 AM	414	for_each_online_cpu(i) {
	415	seq_printf(m,
	416	"Cpu%dBogo\t: %lu.%02lu\n",
	417	i,
	418	cpu_data(i).udelay_val/(500000/HZ),
	419	(cpu_data(i).udelay_val/(5000/HZ))%100);
1da177e4 LT	420	}
	421	}
	422
	423	void smp_info(struct seq_file *m)
	424	{
	425	int i;
	426
	427	seq_printf(m, "State:\n");
394e3902 AM	428	for_each_online_cpu(i)
394e3902 AM	429	seq_printf(m, "CPU%d\t\t: online\n", i);
1da177e4	430	}