1 #include <linux/threads.h>
2 #include <linux/cpumask.h>
3 #include <linux/string.h>
4 #include <linux/kernel.h>
5 #include <linux/ctype.h>
6 #include <linux/init.h>
9 #include <asm/genapic.h>
12 /* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */
14 static cpumask_t
x2apic_target_cpus(void)
16 return cpumask_of_cpu(0);
19 static cpumask_t
x2apic_vector_allocation_domain(int cpu
)
21 cpumask_t domain
= CPU_MASK_NONE
;
26 static void __x2apic_send_IPI_dest(unsigned int apicid
, int vector
,
31 cfg
= __prepare_ICR(0, vector
, dest
);
36 x2apic_icr_write(cfg
, apicid
);
39 static void x2apic_send_IPI_mask(cpumask_t mask
, int vector
)
42 unsigned long query_cpu
;
44 local_irq_save(flags
);
45 for_each_cpu_mask(query_cpu
, mask
) {
46 __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid
, query_cpu
),
47 vector
, APIC_DEST_PHYSICAL
);
49 local_irq_restore(flags
);
52 static void x2apic_send_IPI_allbutself(int vector
)
54 cpumask_t mask
= cpu_online_map
;
56 cpu_clear(smp_processor_id(), mask
);
58 if (!cpus_empty(mask
))
59 x2apic_send_IPI_mask(mask
, vector
);
62 static void x2apic_send_IPI_all(int vector
)
64 x2apic_send_IPI_mask(cpu_online_map
, vector
);
67 static int x2apic_apic_id_registered(void)
72 static unsigned int x2apic_cpu_mask_to_apicid(cpumask_t cpumask
)
77 * We're using fixed IRQ delivery, can only return one phys APIC ID.
78 * May as well be the first.
80 cpu
= first_cpu(cpumask
);
81 if ((unsigned)cpu
< NR_CPUS
)
82 return per_cpu(x86_cpu_to_apicid
, cpu
);
87 static unsigned int get_apic_id(unsigned long x
)
95 static unsigned long set_apic_id(unsigned int id
)
103 static unsigned int x2apic_read_id(void)
105 return apic_read(APIC_ID
);
108 static unsigned int phys_pkg_id(int index_msb
)
110 return x2apic_read_id() >> index_msb
;
113 void x2apic_send_IPI_self(int vector
)
115 apic_write(APIC_SELF_IPI
, vector
);
118 void init_x2apic_ldr(void)
123 struct genapic apic_x2apic_phys
= {
124 .name
= "physical x2apic",
125 .int_delivery_mode
= dest_Fixed
,
126 .int_dest_mode
= (APIC_DEST_PHYSICAL
!= 0),
127 .target_cpus
= x2apic_target_cpus
,
128 .vector_allocation_domain
= x2apic_vector_allocation_domain
,
129 .apic_id_registered
= x2apic_apic_id_registered
,
130 .init_apic_ldr
= init_x2apic_ldr
,
131 .send_IPI_all
= x2apic_send_IPI_all
,
132 .send_IPI_allbutself
= x2apic_send_IPI_allbutself
,
133 .send_IPI_mask
= x2apic_send_IPI_mask
,
134 .send_IPI_self
= x2apic_send_IPI_self
,
135 .cpu_mask_to_apicid
= x2apic_cpu_mask_to_apicid
,
136 .phys_pkg_id
= phys_pkg_id
,
137 .get_apic_id
= get_apic_id
,
138 .set_apic_id
= set_apic_id
,
139 .apic_id_mask
= (0xFFFFFFFFu
),