This source file includes following definitions.
- default_x86_32_early_logical_apicid
- setup_apic_flat_routing
- default_apic_id_registered
- default_init_apic_ldr
- default_phys_pkg_id
- probe_default
- parse_apic
- default_setup_apic_routing
- generic_apic_probe
- default_acpi_madt_oem_check
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9 #include <linux/export.h>
10 #include <linux/errno.h>
11 #include <linux/smp.h>
12
13 #include <asm/apic.h>
14 #include <asm/acpi.h>
15
16 #include "local.h"
17
18 static int default_x86_32_early_logical_apicid(int cpu)
19 {
20 return 1 << cpu;
21 }
22
23 static void setup_apic_flat_routing(void)
24 {
25 #ifdef CONFIG_X86_IO_APIC
26 printk(KERN_INFO
27 "Enabling APIC mode: Flat. Using %d I/O APICs\n",
28 nr_ioapics);
29 #endif
30 }
31
32 static int default_apic_id_registered(void)
33 {
34 return physid_isset(read_apic_id(), phys_cpu_present_map);
35 }
36
37
38
39
40
41
42 static void default_init_apic_ldr(void)
43 {
44 unsigned long val;
45
46 apic_write(APIC_DFR, APIC_DFR_VALUE);
47 val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
48 val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
49 apic_write(APIC_LDR, val);
50 }
51
52 static int default_phys_pkg_id(int cpuid_apic, int index_msb)
53 {
54 return cpuid_apic >> index_msb;
55 }
56
57
58 static int probe_default(void)
59 {
60 return 1;
61 }
62
63 static struct apic apic_default __ro_after_init = {
64
65 .name = "default",
66 .probe = probe_default,
67 .acpi_madt_oem_check = NULL,
68 .apic_id_valid = default_apic_id_valid,
69 .apic_id_registered = default_apic_id_registered,
70
71 .irq_delivery_mode = dest_Fixed,
72
73 .irq_dest_mode = 1,
74
75 .disable_esr = 0,
76 .dest_logical = APIC_DEST_LOGICAL,
77 .check_apicid_used = default_check_apicid_used,
78
79 .init_apic_ldr = default_init_apic_ldr,
80
81 .ioapic_phys_id_map = default_ioapic_phys_id_map,
82 .setup_apic_routing = setup_apic_flat_routing,
83 .cpu_present_to_apicid = default_cpu_present_to_apicid,
84 .apicid_to_cpu_present = physid_set_mask_of_physid,
85 .check_phys_apicid_present = default_check_phys_apicid_present,
86 .phys_pkg_id = default_phys_pkg_id,
87
88 .get_apic_id = default_get_apic_id,
89 .set_apic_id = NULL,
90
91 .calc_dest_apicid = apic_flat_calc_apicid,
92
93 .send_IPI = default_send_IPI_single,
94 .send_IPI_mask = default_send_IPI_mask_logical,
95 .send_IPI_mask_allbutself = default_send_IPI_mask_allbutself_logical,
96 .send_IPI_allbutself = default_send_IPI_allbutself,
97 .send_IPI_all = default_send_IPI_all,
98 .send_IPI_self = default_send_IPI_self,
99
100 .inquire_remote_apic = default_inquire_remote_apic,
101
102 .read = native_apic_mem_read,
103 .write = native_apic_mem_write,
104 .eoi_write = native_apic_mem_write,
105 .icr_read = native_apic_icr_read,
106 .icr_write = native_apic_icr_write,
107 .wait_icr_idle = native_apic_wait_icr_idle,
108 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
109
110 .x86_32_early_logical_apicid = default_x86_32_early_logical_apicid,
111 };
112
113 apic_driver(apic_default);
114
115 struct apic *apic __ro_after_init = &apic_default;
116 EXPORT_SYMBOL_GPL(apic);
117
118 static int cmdline_apic __initdata;
119 static int __init parse_apic(char *arg)
120 {
121 struct apic **drv;
122
123 if (!arg)
124 return -EINVAL;
125
126 for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
127 if (!strcmp((*drv)->name, arg)) {
128 apic = *drv;
129 cmdline_apic = 1;
130 return 0;
131 }
132 }
133
134
135 return 0;
136 }
137 early_param("apic", parse_apic);
138
139 void __init default_setup_apic_routing(void)
140 {
141 int version = boot_cpu_apic_version;
142
143 if (num_possible_cpus() > 8) {
144 switch (boot_cpu_data.x86_vendor) {
145 case X86_VENDOR_INTEL:
146 if (!APIC_XAPIC(version)) {
147 def_to_bigsmp = 0;
148 break;
149 }
150
151
152 case X86_VENDOR_HYGON:
153 case X86_VENDOR_AMD:
154 def_to_bigsmp = 1;
155 }
156 }
157
158 #ifdef CONFIG_X86_BIGSMP
159
160
161
162
163
164
165
166 if (!cmdline_apic && apic == &apic_default)
167 generic_bigsmp_probe();
168 #endif
169
170 if (apic->setup_apic_routing)
171 apic->setup_apic_routing();
172
173 if (x86_platform.apic_post_init)
174 x86_platform.apic_post_init();
175 }
176
177 void __init generic_apic_probe(void)
178 {
179 if (!cmdline_apic) {
180 struct apic **drv;
181
182 for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
183 if ((*drv)->probe()) {
184 apic = *drv;
185 break;
186 }
187 }
188
189 if (drv == __apicdrivers_end)
190 panic("Didn't find an APIC driver");
191 }
192 printk(KERN_INFO "Using APIC driver %s\n", apic->name);
193 }
194
195
196 int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
197 {
198 struct apic **drv;
199
200 for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
201 if (!(*drv)->acpi_madt_oem_check)
202 continue;
203 if (!(*drv)->acpi_madt_oem_check(oem_id, oem_table_id))
204 continue;
205
206 if (!cmdline_apic) {
207 apic = *drv;
208 printk(KERN_INFO "Switched to APIC driver `%s'.\n",
209 apic->name);
210 }
211 return 1;
212 }
213 return 0;
214 }