[linux-2.6-block.git] / arch / x86 / kernel / apic / ipi.c

#include <linux/cpumask.h>
#include <linux/interrupt.h>

#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/kernel_stat.h>
#include <linux/mc146818rtc.h>
#include <linux/cache.h>
#include <linux/cpu.h>
#include <linux/module.h>

#include <asm/smp.h>
#include <asm/mtrr.h>
#include <asm/tlbflush.h>
#include <asm/mmu_context.h>
#include <asm/apic.h>
#include <asm/proto.h>
#include <asm/ipi.h>

void default_send_IPI_mask_sequence_phys(const struct cpumask *mask, int vector)
{
	unsigned long query_cpu;
	unsigned long flags;

	/*
	 * Hack. The clustered APIC addressing mode doesn't allow us to send
	 * to an arbitrary mask, so I do a unicast to each CPU instead.
	 * - mbligh
	 */
	local_irq_save(flags);
	for_each_cpu(query_cpu, mask) {
		__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid,
				query_cpu), vector, APIC_DEST_PHYSICAL);
	}
	local_irq_restore(flags);
}

void default_send_IPI_mask_allbutself_phys(const struct cpumask *mask,
						 int vector)
{
	unsigned int this_cpu = smp_processor_id();
	unsigned int query_cpu;
	unsigned long flags;

	/* See Hack comment above */

	local_irq_save(flags);
	for_each_cpu(query_cpu, mask) {
		if (query_cpu == this_cpu)
			continue;
		__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid,
				 query_cpu), vector, APIC_DEST_PHYSICAL);
	}
	local_irq_restore(flags);
}

#ifdef CONFIG_X86_32

void default_send_IPI_mask_sequence_logical(const struct cpumask *mask,
						 int vector)
{
	unsigned long flags;
	unsigned int query_cpu;

	/*
	 * Hack. The clustered APIC addressing mode doesn't allow us to send
	 * to an arbitrary mask, so I do a unicasts to each CPU instead. This
	 * should be modified to do 1 message per cluster ID - mbligh
	 */

	local_irq_save(flags);
	for_each_cpu(query_cpu, mask)
		__default_send_IPI_dest_field(
			early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
			vector, apic->dest_logical);
	local_irq_restore(flags);
}

void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask,
						 int vector)
{
	unsigned long flags;
	unsigned int query_cpu;
	unsigned int this_cpu = smp_processor_id();

	/* See Hack comment above */

	local_irq_save(flags);
	for_each_cpu(query_cpu, mask) {
		if (query_cpu == this_cpu)
			continue;
		__default_send_IPI_dest_field(
			early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
			vector, apic->dest_logical);
		}
	local_irq_restore(flags);
}

/*
 * This is only used on smaller machines.
 */
void default_send_IPI_mask_logical(const struct cpumask *cpumask, int vector)
{
	unsigned long mask = cpumask_bits(cpumask)[0];
	unsigned long flags;

	if (!mask)
		return;

	local_irq_save(flags);
	WARN_ON(mask & ~cpumask_bits(cpu_online_mask)[0]);
	__default_send_IPI_dest_field(mask, vector, apic->dest_logical);
	local_irq_restore(flags);
}

void default_send_IPI_allbutself(int vector)
{
	/*
	 * if there are no other CPUs in the system then we get an APIC send
	 * error if we try to broadcast, thus avoid sending IPIs in this case.
	 */
	if (!(num_online_cpus() > 1))
		return;

	__default_local_send_IPI_allbutself(vector);
}

void default_send_IPI_all(int vector)
{
	__default_local_send_IPI_all(vector);
}

void default_send_IPI_self(int vector)
{
	__default_send_IPI_shortcut(APIC_DEST_SELF, vector, apic->dest_logical);
}

/* must come after the send_IPI functions above for inlining */
static int convert_apicid_to_cpu(int apic_id)
{
	int i;

	for_each_possible_cpu(i) {
		if (per_cpu(x86_cpu_to_apicid, i) == apic_id)
			return i;
	}
	return -1;
}

int safe_smp_processor_id(void)
{
	int apicid, cpuid;

	if (!cpu_has_apic)
		return 0;

	apicid = hard_smp_processor_id();
	if (apicid == BAD_APICID)
		return 0;

	cpuid = convert_apicid_to_cpu(apicid);

	return cpuid >= 0 ? cpuid : 0;
}
#endif
Commit	Line	Data
82023503 GC	1	#include <linux/cpumask.h>
82023503 GC	2	#include <linux/interrupt.h>
82023503 GC	3
	4	#include <linux/mm.h>
	5	#include <linux/delay.h>
	6	#include <linux/spinlock.h>
	7	#include <linux/kernel_stat.h>
	8	#include <linux/mc146818rtc.h>
	9	#include <linux/cache.h>
82023503 GC	10	#include <linux/cpu.h>
	11	#include <linux/module.h>
	12
	13	#include <asm/smp.h>
	14	#include <asm/mtrr.h>
	15	#include <asm/tlbflush.h>
	16	#include <asm/mmu_context.h>
7b6aa335	17	#include <asm/apic.h>
82023503	18	#include <asm/proto.h>
43f39890	19	#include <asm/ipi.h>
82023503	20
c5e95482 YL	21	void default_send_IPI_mask_sequence_phys(const struct cpumask *mask, int vector)
	22	{
	23	unsigned long query_cpu;
	24	unsigned long flags;
	25
	26	/*
	27	* Hack. The clustered APIC addressing mode doesn't allow us to send
	28	* to an arbitrary mask, so I do a unicast to each CPU instead.
	29	* - mbligh
	30	*/
	31	local_irq_save(flags);
	32	for_each_cpu(query_cpu, mask) {
	33	__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid,
	34	query_cpu), vector, APIC_DEST_PHYSICAL);
	35	}
	36	local_irq_restore(flags);
	37	}
	38
	39	void default_send_IPI_mask_allbutself_phys(const struct cpumask *mask,
	40	int vector)
	41	{
	42	unsigned int this_cpu = smp_processor_id();
	43	unsigned int query_cpu;
	44	unsigned long flags;
	45
	46	/* See Hack comment above */
	47
	48	local_irq_save(flags);
	49	for_each_cpu(query_cpu, mask) {
	50	if (query_cpu == this_cpu)
	51	continue;
	52	__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid,
	53	query_cpu), vector, APIC_DEST_PHYSICAL);
	54	}
	55	local_irq_restore(flags);
	56	}
	57
1245e166 TH	58	#ifdef CONFIG_X86_32
1245e166 TH	59
c5e95482 YL	60	void default_send_IPI_mask_sequence_logical(const struct cpumask *mask,
	61	int vector)
	62	{
	63	unsigned long flags;
	64	unsigned int query_cpu;
	65
	66	/*
	67	* Hack. The clustered APIC addressing mode doesn't allow us to send
	68	* to an arbitrary mask, so I do a unicasts to each CPU instead. This
	69	* should be modified to do 1 message per cluster ID - mbligh
	70	*/
	71
	72	local_irq_save(flags);
	73	for_each_cpu(query_cpu, mask)
	74	__default_send_IPI_dest_field(
6f802c4b TH	75	early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
6f802c4b TH	76	vector, apic->dest_logical);
c5e95482 YL	77	local_irq_restore(flags);
	78	}
	79
	80	void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask,
	81	int vector)
	82	{
	83	unsigned long flags;
	84	unsigned int query_cpu;
	85	unsigned int this_cpu = smp_processor_id();
	86
	87	/* See Hack comment above */
	88
	89	local_irq_save(flags);
	90	for_each_cpu(query_cpu, mask) {
	91	if (query_cpu == this_cpu)
	92	continue;
	93	__default_send_IPI_dest_field(
6f802c4b TH	94	early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
6f802c4b TH	95	vector, apic->dest_logical);
c5e95482 YL	96	}
	97	local_irq_restore(flags);
	98	}
	99
c5e95482 YL	100	/*
	101	* This is only used on smaller machines.
	102	*/
	103	void default_send_IPI_mask_logical(const struct cpumask *cpumask, int vector)
	104	{
	105	unsigned long mask = cpumask_bits(cpumask)[0];
	106	unsigned long flags;
	107
e3f0f36d	108	if (!mask)
83d349f3 LT	109	return;
83d349f3 LT	110
c5e95482 YL	111	local_irq_save(flags);
	112	WARN_ON(mask & ~cpumask_bits(cpu_online_mask)[0]);
	113	__default_send_IPI_dest_field(mask, vector, apic->dest_logical);
	114	local_irq_restore(flags);
	115	}
	116
	117	void default_send_IPI_allbutself(int vector)
	118	{
	119	/*
	120	* if there are no other CPUs in the system then we get an APIC send
	121	* error if we try to broadcast, thus avoid sending IPIs in this case.
	122	*/
	123	if (!(num_online_cpus() > 1))
	124	return;
	125
	126	__default_local_send_IPI_allbutself(vector);
	127	}
	128
	129	void default_send_IPI_all(int vector)
	130	{
	131	__default_local_send_IPI_all(vector);
	132	}
	133
dac5f412	134	void default_send_IPI_self(int vector)
82023503	135	{
43f39890	136	__default_send_IPI_shortcut(APIC_DEST_SELF, vector, apic->dest_logical);
82023503 GC	137	}
	138
	139	/* must come after the send_IPI functions above for inlining */
82023503 GC	140	static int convert_apicid_to_cpu(int apic_id)
	141	{
	142	int i;
	143
	144	for_each_possible_cpu(i) {
	145	if (per_cpu(x86_cpu_to_apicid, i) == apic_id)
	146	return i;
	147	}
	148	return -1;
	149	}
	150
	151	int safe_smp_processor_id(void)
	152	{
	153	int apicid, cpuid;
	154
a1b4f1a5	155	if (!cpu_has_apic)
82023503 GC	156	return 0;
	157
	158	apicid = hard_smp_processor_id();
	159	if (apicid == BAD_APICID)
	160	return 0;
	161
	162	cpuid = convert_apicid_to_cpu(apicid);
	163
	164	return cpuid >= 0 ? cpuid : 0;
	165	}
	166	#endif