Merge branch 'x86/core' into x86/xsave
[linux-2.6] / arch / x86 / kernel / genx2apic_phys.c
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>
7 #include <linux/dmar.h>
8
9 #include <asm/smp.h>
10 #include <asm/ipi.h>
11 #include <asm/genapic.h>
12
13 static int x2apic_phys;
14
15 static int set_x2apic_phys_mode(char *arg)
16 {
17         x2apic_phys = 1;
18         return 0;
19 }
20 early_param("x2apic_phys", set_x2apic_phys_mode);
21
22 static int __init x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
23 {
24         if (cpu_has_x2apic && x2apic_phys)
25                 return 1;
26
27         return 0;
28 }
29
30 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */
31
32 static cpumask_t x2apic_target_cpus(void)
33 {
34         return cpumask_of_cpu(0);
35 }
36
37 static cpumask_t x2apic_vector_allocation_domain(int cpu)
38 {
39         cpumask_t domain = CPU_MASK_NONE;
40         cpu_set(cpu, domain);
41         return domain;
42 }
43
44 static void __x2apic_send_IPI_dest(unsigned int apicid, int vector,
45                                    unsigned int dest)
46 {
47         unsigned long cfg;
48
49         cfg = __prepare_ICR(0, vector, dest);
50
51         /*
52          * send the IPI.
53          */
54         x2apic_icr_write(cfg, apicid);
55 }
56
57 static void x2apic_send_IPI_mask(cpumask_t mask, int vector)
58 {
59         unsigned long flags;
60         unsigned long query_cpu;
61
62         local_irq_save(flags);
63         for_each_cpu_mask(query_cpu, mask) {
64                 __x2apic_send_IPI_dest(per_cpu(x86_cpu_to_apicid, query_cpu),
65                                        vector, APIC_DEST_PHYSICAL);
66         }
67         local_irq_restore(flags);
68 }
69
70 static void x2apic_send_IPI_allbutself(int vector)
71 {
72         cpumask_t mask = cpu_online_map;
73
74         cpu_clear(smp_processor_id(), mask);
75
76         if (!cpus_empty(mask))
77                 x2apic_send_IPI_mask(mask, vector);
78 }
79
80 static void x2apic_send_IPI_all(int vector)
81 {
82         x2apic_send_IPI_mask(cpu_online_map, vector);
83 }
84
85 static int x2apic_apic_id_registered(void)
86 {
87         return 1;
88 }
89
90 static unsigned int x2apic_cpu_mask_to_apicid(cpumask_t cpumask)
91 {
92         int cpu;
93
94         /*
95          * We're using fixed IRQ delivery, can only return one phys APIC ID.
96          * May as well be the first.
97          */
98         cpu = first_cpu(cpumask);
99         if ((unsigned)cpu < NR_CPUS)
100                 return per_cpu(x86_cpu_to_apicid, cpu);
101         else
102                 return BAD_APICID;
103 }
104
105 static unsigned int get_apic_id(unsigned long x)
106 {
107         unsigned int id;
108
109         id = x;
110         return id;
111 }
112
113 static unsigned long set_apic_id(unsigned int id)
114 {
115         unsigned long x;
116
117         x = id;
118         return x;
119 }
120
121 static unsigned int x2apic_read_id(void)
122 {
123         return apic_read(APIC_ID);
124 }
125
126 static unsigned int phys_pkg_id(int index_msb)
127 {
128         return x2apic_read_id() >> index_msb;
129 }
130
131 void x2apic_send_IPI_self(int vector)
132 {
133         apic_write(APIC_SELF_IPI, vector);
134 }
135
136 void init_x2apic_ldr(void)
137 {
138         return;
139 }
140
141 struct genapic apic_x2apic_phys = {
142         .name = "physical x2apic",
143         .acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
144         .int_delivery_mode = dest_Fixed,
145         .int_dest_mode = (APIC_DEST_PHYSICAL != 0),
146         .target_cpus = x2apic_target_cpus,
147         .vector_allocation_domain = x2apic_vector_allocation_domain,
148         .apic_id_registered = x2apic_apic_id_registered,
149         .init_apic_ldr = init_x2apic_ldr,
150         .send_IPI_all = x2apic_send_IPI_all,
151         .send_IPI_allbutself = x2apic_send_IPI_allbutself,
152         .send_IPI_mask = x2apic_send_IPI_mask,
153         .send_IPI_self = x2apic_send_IPI_self,
154         .cpu_mask_to_apicid = x2apic_cpu_mask_to_apicid,
155         .phys_pkg_id = phys_pkg_id,
156         .get_apic_id = get_apic_id,
157         .set_apic_id = set_apic_id,
158         .apic_id_mask = (0xFFFFFFFFu),
159 };