1 #include <linux/cpumask.h>
2 #include <linux/interrupt.h>
3 #include <linux/init.h>
6 #include <linux/delay.h>
7 #include <linux/spinlock.h>
8 #include <linux/kernel_stat.h>
9 #include <linux/mc146818rtc.h>
10 #include <linux/cache.h>
11 #include <linux/cpu.h>
12 #include <linux/module.h>
16 #include <asm/tlbflush.h>
17 #include <asm/mmu_context.h>
19 #include <asm/proto.h>
22 void default_send_IPI_mask_sequence_phys(const struct cpumask
*mask
, int vector
)
24 unsigned long query_cpu
;
28 * Hack. The clustered APIC addressing mode doesn't allow us to send
29 * to an arbitrary mask, so I do a unicast to each CPU instead.
32 local_irq_save(flags
);
33 for_each_cpu(query_cpu
, mask
) {
34 __default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid
,
35 query_cpu
), vector
, APIC_DEST_PHYSICAL
);
37 local_irq_restore(flags
);
40 void default_send_IPI_mask_allbutself_phys(const struct cpumask
*mask
,
43 unsigned int this_cpu
= smp_processor_id();
44 unsigned int query_cpu
;
47 /* See Hack comment above */
49 local_irq_save(flags
);
50 for_each_cpu(query_cpu
, mask
) {
51 if (query_cpu
== this_cpu
)
53 __default_send_IPI_dest_field(per_cpu(x86_cpu_to_apicid
,
54 query_cpu
), vector
, APIC_DEST_PHYSICAL
);
56 local_irq_restore(flags
);
59 void default_send_IPI_mask_sequence_logical(const struct cpumask
*mask
,
63 unsigned int query_cpu
;
66 * Hack. The clustered APIC addressing mode doesn't allow us to send
67 * to an arbitrary mask, so I do a unicasts to each CPU instead. This
68 * should be modified to do 1 message per cluster ID - mbligh
71 local_irq_save(flags
);
72 for_each_cpu(query_cpu
, mask
)
73 __default_send_IPI_dest_field(
74 apic
->cpu_to_logical_apicid(query_cpu
), vector
,
76 local_irq_restore(flags
);
79 void default_send_IPI_mask_allbutself_logical(const struct cpumask
*mask
,
83 unsigned int query_cpu
;
84 unsigned int this_cpu
= smp_processor_id();
86 /* See Hack comment above */
88 local_irq_save(flags
);
89 for_each_cpu(query_cpu
, mask
) {
90 if (query_cpu
== this_cpu
)
92 __default_send_IPI_dest_field(
93 apic
->cpu_to_logical_apicid(query_cpu
), vector
,
96 local_irq_restore(flags
);
102 * This is only used on smaller machines.
104 void default_send_IPI_mask_logical(const struct cpumask
*cpumask
, int vector
)
106 unsigned long mask
= cpumask_bits(cpumask
)[0];
109 local_irq_save(flags
);
110 WARN_ON(mask
& ~cpumask_bits(cpu_online_mask
)[0]);
111 __default_send_IPI_dest_field(mask
, vector
, apic
->dest_logical
);
112 local_irq_restore(flags
);
115 void default_send_IPI_allbutself(int vector
)
118 * if there are no other CPUs in the system then we get an APIC send
119 * error if we try to broadcast, thus avoid sending IPIs in this case.
121 if (!(num_online_cpus() > 1))
124 __default_local_send_IPI_allbutself(vector
);
127 void default_send_IPI_all(int vector
)
129 __default_local_send_IPI_all(vector
);
132 void default_send_IPI_self(int vector
)
134 __default_send_IPI_shortcut(APIC_DEST_SELF
, vector
, apic
->dest_logical
);
137 /* must come after the send_IPI functions above for inlining */
138 static int convert_apicid_to_cpu(int apic_id
)
142 for_each_possible_cpu(i
) {
143 if (per_cpu(x86_cpu_to_apicid
, i
) == apic_id
)
149 int safe_smp_processor_id(void)
153 if (!boot_cpu_has(X86_FEATURE_APIC
))
156 apicid
= hard_smp_processor_id();
157 if (apicid
== BAD_APICID
)
160 cpuid
= convert_apicid_to_cpu(apicid
);
162 return cpuid
>= 0 ? cpuid
: 0;