[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);
}

#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
1245e166 TH	68	#ifdef CONFIG_X86_32
1245e166 TH	69
c5e95482 YL	70	void default_send_IPI_mask_sequence_logical(const struct cpumask *mask,
	71	int vector)
	72	{
	73	unsigned long flags;
	74	unsigned int query_cpu;
	75
	76	/*
	77	* Hack. The clustered APIC addressing mode doesn't allow us to send
	78	* to an arbitrary mask, so I do a unicasts to each CPU instead. This
	79	* should be modified to do 1 message per cluster ID - mbligh
	80	*/
	81
	82	local_irq_save(flags);
	83	for_each_cpu(query_cpu, mask)
	84	__default_send_IPI_dest_field(
6f802c4b TH	85	early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
6f802c4b TH	86	vector, apic->dest_logical);
c5e95482 YL	87	local_irq_restore(flags);
	88	}
	89
	90	void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask,
	91	int vector)
	92	{
	93	unsigned long flags;
	94	unsigned int query_cpu;
	95	unsigned int this_cpu = smp_processor_id();
	96
	97	/* See Hack comment above */
	98
	99	local_irq_save(flags);
	100	for_each_cpu(query_cpu, mask) {
	101	if (query_cpu == this_cpu)
	102	continue;
	103	__default_send_IPI_dest_field(
6f802c4b TH	104	early_per_cpu(x86_cpu_to_logical_apicid, query_cpu),
6f802c4b TH	105	vector, apic->dest_logical);
c5e95482 YL	106	}
	107	local_irq_restore(flags);
	108	}
	109
c5e95482 YL	110	/*
	111	* This is only used on smaller machines.
	112	*/
	113	void default_send_IPI_mask_logical(const struct cpumask *cpumask, int vector)
	114	{
	115	unsigned long mask = cpumask_bits(cpumask)[0];
	116	unsigned long flags;
	117
e3f0f36d	118	if (!mask)
83d349f3 LT	119	return;
83d349f3 LT	120
c5e95482 YL	121	local_irq_save(flags);
	122	WARN_ON(mask & ~cpumask_bits(cpu_online_mask)[0]);
	123	__default_send_IPI_dest_field(mask, vector, apic->dest_logical);
	124	local_irq_restore(flags);
	125	}
	126
	127	void default_send_IPI_allbutself(int vector)
	128	{
	129	/*
	130	* if there are no other CPUs in the system then we get an APIC send
	131	* error if we try to broadcast, thus avoid sending IPIs in this case.
	132	*/
	133	if (!(num_online_cpus() > 1))
	134	return;
	135
	136	__default_local_send_IPI_allbutself(vector);
	137	}
	138
	139	void default_send_IPI_all(int vector)
	140	{
	141	__default_local_send_IPI_all(vector);
	142	}
	143
dac5f412	144	void default_send_IPI_self(int vector)
82023503	145	{
43f39890	146	__default_send_IPI_shortcut(APIC_DEST_SELF, vector, apic->dest_logical);
82023503 GC	147	}
	148
	149	/* must come after the send_IPI functions above for inlining */
82023503 GC	150	static int convert_apicid_to_cpu(int apic_id)
	151	{
	152	int i;
	153
	154	for_each_possible_cpu(i) {
	155	if (per_cpu(x86_cpu_to_apicid, i) == apic_id)
	156	return i;
	157	}
	158	return -1;
	159	}
	160
	161	int safe_smp_processor_id(void)
	162	{
	163	int apicid, cpuid;
	164
a1b4f1a5	165	if (!cpu_has_apic)
82023503 GC	166	return 0;
	167
	168	apicid = hard_smp_processor_id();
	169	if (apicid == BAD_APICID)
	170	return 0;
	171
	172	cpuid = convert_apicid_to_cpu(apicid);
	173
	174	return cpuid >= 0 ? cpuid : 0;
	175	}
	176	#endif