[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_single_phys(int cpu, int vector)
{
	unsigned long flags;

	local_irq_save(flags);
	__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid, cpu),
				      vector, APIC_DEST_PHYSICAL);
	local_irq_restore(flags);
}

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);
}

/*
 * Helper function for APICs which insist on cpumasks
 */
void default_send_IPI_single(int cpu, int vector)
{
	apic->send_IPI_mask(cpumask_of(cpu), vector);
}

#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
53be0fac TG	21	void default_send_IPI_single_phys(int cpu, int vector)
	22	{
	23	unsigned long flags;
	24
	25	local_irq_save(flags);
	26	__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid, cpu),
	27	vector, APIC_DEST_PHYSICAL);
	28	local_irq_restore(flags);
	29	}
	30
c5e95482 YL	31	void default_send_IPI_mask_sequence_phys(const struct cpumask *mask, int vector)
	32	{
	33	unsigned long query_cpu;
	34	unsigned long flags;
	35
	36	/*
	37	* Hack. The clustered APIC addressing mode doesn't allow us to send
	38	* to an arbitrary mask, so I do a unicast to each CPU instead.
	39	* - mbligh
	40	*/
	41	local_irq_save(flags);
	42	for_each_cpu(query_cpu, mask) {
	43	__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid,
	44	query_cpu), vector, APIC_DEST_PHYSICAL);
	45	}
	46	local_irq_restore(flags);
	47	}
	48
	49	void default_send_IPI_mask_allbutself_phys(const struct cpumask *mask,
	50	int vector)
	51	{
	52	unsigned int this_cpu = smp_processor_id();
	53	unsigned int query_cpu;
	54	unsigned long flags;
	55
	56	/* See Hack comment above */
	57
	58	local_irq_save(flags);
	59	for_each_cpu(query_cpu, mask) {
	60	if (query_cpu == this_cpu)
	61	continue;
	62	__default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid,
	63	query_cpu), vector, APIC_DEST_PHYSICAL);
	64	}
	65	local_irq_restore(flags);
	66	}
	67
7e29393b TG	68	/*
	69	* Helper function for APICs which insist on cpumasks
	70	*/
	71	void default_send_IPI_single(int cpu, int vector)
	72	{
	73	apic->send_IPI_mask(cpumask_of(cpu), vector);
	74	}
	75
1245e166 TH	76	#ifdef CONFIG_X86_32
1245e166 TH	77
c5e95482 YL	78	void default_send_IPI_mask_sequence_logical(const struct cpumask *mask,
	79	int vector)
	80	{
	81	unsigned long flags;
	82	unsigned int query_cpu;
	83
	84	/*
	85	* Hack. The clustered APIC addressing mode doesn't allow us to send
	86	* to an arbitrary mask, so I do a unicasts to each CPU instead. This
	87	* should be modified to do 1 message per cluster ID - mbligh
	88	*/
	89
	90	local_irq_save(flags);
	91	for_each_cpu(query_cpu, mask)
	92	__default_send_IPI_dest_field(
6f802c4b TH	93	early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
6f802c4b TH	94	vector, apic->dest_logical);
c5e95482 YL	95	local_irq_restore(flags);
	96	}
	97
	98	void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask,
	99	int vector)
	100	{
	101	unsigned long flags;
	102	unsigned int query_cpu;
	103	unsigned int this_cpu = smp_processor_id();
	104
	105	/* See Hack comment above */
	106
	107	local_irq_save(flags);
	108	for_each_cpu(query_cpu, mask) {
	109	if (query_cpu == this_cpu)
	110	continue;
	111	__default_send_IPI_dest_field(
6f802c4b TH	112	early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
6f802c4b TH	113	vector, apic->dest_logical);
c5e95482 YL	114	}
	115	local_irq_restore(flags);
	116	}
	117
c5e95482 YL	118	/*
	119	* This is only used on smaller machines.
	120	*/
	121	void default_send_IPI_mask_logical(const struct cpumask *cpumask, int vector)
	122	{
	123	unsigned long mask = cpumask_bits(cpumask)[0];
	124	unsigned long flags;
	125
e3f0f36d	126	if (!mask)
83d349f3 LT	127	return;
83d349f3 LT	128
c5e95482 YL	129	local_irq_save(flags);
	130	WARN_ON(mask & ~cpumask_bits(cpu_online_mask)[0]);
	131	__default_send_IPI_dest_field(mask, vector, apic->dest_logical);
	132	local_irq_restore(flags);
	133	}
	134
	135	void default_send_IPI_allbutself(int vector)
	136	{
	137	/*
	138	* if there are no other CPUs in the system then we get an APIC send
	139	* error if we try to broadcast, thus avoid sending IPIs in this case.
	140	*/
	141	if (!(num_online_cpus() > 1))
	142	return;
	143
	144	__default_local_send_IPI_allbutself(vector);
	145	}
	146
	147	void default_send_IPI_all(int vector)
	148	{
	149	__default_local_send_IPI_all(vector);
	150	}
	151
dac5f412	152	void default_send_IPI_self(int vector)
82023503	153	{
43f39890	154	__default_send_IPI_shortcut(APIC_DEST_SELF, vector, apic->dest_logical);
82023503 GC	155	}
	156
	157	/* must come after the send_IPI functions above for inlining */
82023503 GC	158	static int convert_apicid_to_cpu(int apic_id)
	159	{
	160	int i;
	161
	162	for_each_possible_cpu(i) {
	163	if (per_cpu(x86_cpu_to_apicid, i) == apic_id)
	164	return i;
	165	}
	166	return -1;
	167	}
	168
	169	int safe_smp_processor_id(void)
	170	{
	171	int apicid, cpuid;
	172
a1b4f1a5	173	if (!cpu_has_apic)
82023503 GC	174	return 0;
	175
	176	apicid = hard_smp_processor_id();
	177	if (apicid == BAD_APICID)
	178	return 0;
	179
	180	cpuid = convert_apicid_to_cpu(apicid);
	181
	182	return cpuid >= 0 ? cpuid : 0;
	183	}
	184	#endif