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yaml --- r: 112659 b: refs/heads/master c: 2d9579a h: refs/heads/master i: 112657: 63d3931 112655: e233710 v: v3
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Suresh Siddha
authored and
Ingo Molnar
committed
Jul 12, 2008
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--- | ||
refs/heads/master: 6e1cb38a2aef7680975e71f23de187859ee8b158 | ||
refs/heads/master: 2d9579a124d746a3e0e0ba45e57d80800ee80807 |
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#include <linux/threads.h> | ||
#include <linux/cpumask.h> | ||
#include <linux/string.h> | ||
#include <linux/kernel.h> | ||
#include <linux/ctype.h> | ||
#include <linux/init.h> | ||
#include <asm/smp.h> | ||
#include <asm/ipi.h> | ||
#include <asm/genapic.h> | ||
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/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */ | ||
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static cpumask_t x2apic_target_cpus(void) | ||
{ | ||
return cpumask_of_cpu(0); | ||
} | ||
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static cpumask_t x2apic_vector_allocation_domain(int cpu) | ||
{ | ||
cpumask_t domain = CPU_MASK_NONE; | ||
cpu_set(cpu, domain); | ||
return domain; | ||
} | ||
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static void __x2apic_send_IPI_dest(unsigned int apicid, int vector, | ||
unsigned int dest) | ||
{ | ||
unsigned long cfg; | ||
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cfg = __prepare_ICR(0, vector, dest); | ||
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/* | ||
* send the IPI. | ||
*/ | ||
x2apic_icr_write(cfg, apicid); | ||
} | ||
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static void x2apic_send_IPI_mask(cpumask_t mask, int vector) | ||
{ | ||
unsigned long flags; | ||
unsigned long query_cpu; | ||
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local_irq_save(flags); | ||
for_each_cpu_mask(query_cpu, mask) { | ||
__x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu), | ||
vector, APIC_DEST_PHYSICAL); | ||
} | ||
local_irq_restore(flags); | ||
} | ||
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static void x2apic_send_IPI_allbutself(int vector) | ||
{ | ||
cpumask_t mask = cpu_online_map; | ||
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cpu_clear(smp_processor_id(), mask); | ||
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if (!cpus_empty(mask)) | ||
x2apic_send_IPI_mask(mask, vector); | ||
} | ||
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static void x2apic_send_IPI_all(int vector) | ||
{ | ||
x2apic_send_IPI_mask(cpu_online_map, vector); | ||
} | ||
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static int x2apic_apic_id_registered(void) | ||
{ | ||
return 1; | ||
} | ||
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static unsigned int x2apic_cpu_mask_to_apicid(cpumask_t cpumask) | ||
{ | ||
int cpu; | ||
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/* | ||
* We're using fixed IRQ delivery, can only return one phys APIC ID. | ||
* May as well be the first. | ||
*/ | ||
cpu = first_cpu(cpumask); | ||
if ((unsigned)cpu < NR_CPUS) | ||
return per_cpu(x86_cpu_to_apicid, cpu); | ||
else | ||
return BAD_APICID; | ||
} | ||
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static unsigned int x2apic_read_id(void) | ||
{ | ||
return apic_read(APIC_ID); | ||
} | ||
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static unsigned int phys_pkg_id(int index_msb) | ||
{ | ||
return x2apic_read_id() >> index_msb; | ||
} | ||
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void x2apic_send_IPI_self(int vector) | ||
{ | ||
apic_write(APIC_SELF_IPI, vector); | ||
} | ||
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void init_x2apic_ldr(void) | ||
{ | ||
return; | ||
} | ||
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struct genapic apic_x2apic_phys = { | ||
.name = "physical x2apic", | ||
.int_delivery_mode = dest_Fixed, | ||
.int_dest_mode = (APIC_DEST_PHYSICAL != 0), | ||
.target_cpus = x2apic_target_cpus, | ||
.vector_allocation_domain = x2apic_vector_allocation_domain, | ||
.apic_id_registered = x2apic_apic_id_registered, | ||
.init_apic_ldr = init_x2apic_ldr, | ||
.send_IPI_all = x2apic_send_IPI_all, | ||
.send_IPI_allbutself = x2apic_send_IPI_allbutself, | ||
.send_IPI_mask = x2apic_send_IPI_mask, | ||
.send_IPI_self = x2apic_send_IPI_self, | ||
.cpu_mask_to_apicid = x2apic_cpu_mask_to_apicid, | ||
.phys_pkg_id = phys_pkg_id, | ||
.read_apic_id = x2apic_read_id, | ||
}; |
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