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Commit | Line | Data |
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9b0c5028 | 1 | /* |
7b387253 IM |
2 | * Default generic APIC driver. This handles up to 8 CPUs. |
3 | * | |
9b0c5028 PC |
4 | * Copyright 2003 Andi Kleen, SuSE Labs. |
5 | * Subject to the GNU Public License, v.2 | |
6 | * | |
1da177e4 | 7 | * Generic x86 APIC driver probe layer. |
9b0c5028 | 8 | */ |
1da177e4 LT |
9 | #include <linux/threads.h> |
10 | #include <linux/cpumask.h> | |
7d01d32d | 11 | #include <linux/module.h> |
1da177e4 LT |
12 | #include <linux/string.h> |
13 | #include <linux/kernel.h> | |
14 | #include <linux/ctype.h> | |
15 | #include <linux/init.h> | |
1a3f239d | 16 | #include <linux/errno.h> |
1da177e4 LT |
17 | #include <asm/fixmap.h> |
18 | #include <asm/mpspec.h> | |
19 | #include <asm/apicdef.h> | |
7b6aa335 | 20 | #include <asm/apic.h> |
54ac14a8 | 21 | #include <asm/setup.h> |
1da177e4 | 22 | |
7b387253 | 23 | #include <linux/smp.h> |
7b387253 IM |
24 | #include <asm/ipi.h> |
25 | ||
6bda2c8b IM |
26 | #include <linux/interrupt.h> |
27 | #include <asm/acpi.h> | |
6bda2c8b | 28 | #include <asm/e820.h> |
6bda2c8b | 29 | |
6bda2c8b IM |
30 | #ifdef CONFIG_HOTPLUG_CPU |
31 | #define DEFAULT_SEND_IPI (1) | |
32 | #else | |
33 | #define DEFAULT_SEND_IPI (0) | |
34 | #endif | |
35 | ||
36 | int no_broadcast = DEFAULT_SEND_IPI; | |
37 | ||
9be1b56a IM |
38 | static __init int no_ipi_broadcast(char *str) |
39 | { | |
40 | get_option(&str, &no_broadcast); | |
41 | pr_info("Using %s mode\n", | |
42 | no_broadcast ? "No IPI Broadcast" : "IPI Broadcast"); | |
43 | return 1; | |
44 | } | |
45 | __setup("no_ipi_broadcast=", no_ipi_broadcast); | |
46 | ||
47 | static int __init print_ipi_mode(void) | |
48 | { | |
49 | pr_info("Using IPI %s mode\n", | |
50 | no_broadcast ? "No-Shortcut" : "Shortcut"); | |
51 | return 0; | |
52 | } | |
53 | late_initcall(print_ipi_mode); | |
6bda2c8b | 54 | |
3f6f6798 TH |
55 | static int default_x86_32_early_logical_apicid(int cpu) |
56 | { | |
57 | return 1 << cpu; | |
58 | } | |
59 | ||
681ee44d | 60 | static void setup_apic_flat_routing(void) |
28aa29ee IM |
61 | { |
62 | #ifdef CONFIG_X86_IO_APIC | |
63 | printk(KERN_INFO | |
64 | "Enabling APIC mode: Flat. Using %d I/O APICs\n", | |
65 | nr_ioapics); | |
66 | #endif | |
67 | } | |
68 | ||
7b387253 IM |
69 | /* should be called last. */ |
70 | static int probe_default(void) | |
71 | { | |
72 | return 1; | |
73 | } | |
74 | ||
1a8880a1 | 75 | static struct apic apic_default = { |
7b387253 IM |
76 | |
77 | .name = "default", | |
78 | .probe = probe_default, | |
79 | .acpi_madt_oem_check = NULL, | |
fa63030e | 80 | .apic_id_valid = default_apic_id_valid, |
7b387253 IM |
81 | .apic_id_registered = default_apic_id_registered, |
82 | ||
83 | .irq_delivery_mode = dest_LowestPrio, | |
84 | /* logical delivery broadcast to all CPUs: */ | |
85 | .irq_dest_mode = 1, | |
86 | ||
87 | .target_cpus = default_target_cpus, | |
88 | .disable_esr = 0, | |
89 | .dest_logical = APIC_DEST_LOGICAL, | |
90 | .check_apicid_used = default_check_apicid_used, | |
7b387253 | 91 | |
9d8e1066 | 92 | .vector_allocation_domain = flat_vector_allocation_domain, |
7b387253 IM |
93 | .init_apic_ldr = default_init_apic_ldr, |
94 | ||
95 | .ioapic_phys_id_map = default_ioapic_phys_id_map, | |
681ee44d | 96 | .setup_apic_routing = setup_apic_flat_routing, |
7b387253 | 97 | .cpu_present_to_apicid = default_cpu_present_to_apicid, |
7abc0753 | 98 | .apicid_to_cpu_present = physid_set_mask_of_physid, |
7b387253 | 99 | .check_phys_apicid_present = default_check_phys_apicid_present, |
7b387253 | 100 | .phys_pkg_id = default_phys_pkg_id, |
7b387253 IM |
101 | |
102 | .get_apic_id = default_get_apic_id, | |
103 | .set_apic_id = NULL, | |
104 | .apic_id_mask = 0x0F << 24, | |
105 | ||
6398268d | 106 | .cpu_mask_to_apicid_and = flat_cpu_mask_to_apicid_and, |
7b387253 | 107 | |
43f39890 YL |
108 | .send_IPI_mask = default_send_IPI_mask_logical, |
109 | .send_IPI_mask_allbutself = default_send_IPI_mask_allbutself_logical, | |
7b387253 IM |
110 | .send_IPI_allbutself = default_send_IPI_allbutself, |
111 | .send_IPI_all = default_send_IPI_all, | |
6b64ee02 | 112 | .send_IPI_self = default_send_IPI_self, |
7b387253 | 113 | |
7b387253 | 114 | .inquire_remote_apic = default_inquire_remote_apic, |
c1eeb2de YL |
115 | |
116 | .read = native_apic_mem_read, | |
117 | .write = native_apic_mem_write, | |
2a43195d | 118 | .eoi_write = native_apic_mem_write, |
c1eeb2de YL |
119 | .icr_read = native_apic_icr_read, |
120 | .icr_write = native_apic_icr_write, | |
121 | .wait_icr_idle = native_apic_wait_icr_idle, | |
122 | .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, | |
acb8bc09 | 123 | |
3f6f6798 | 124 | .x86_32_early_logical_apicid = default_x86_32_early_logical_apicid, |
7b387253 IM |
125 | }; |
126 | ||
107e0e0c SS |
127 | apic_driver(apic_default); |
128 | ||
be163a15 | 129 | struct apic *apic = &apic_default; |
7d01d32d | 130 | EXPORT_SYMBOL_GPL(apic); |
1da177e4 | 131 | |
1a3f239d RR |
132 | static int cmdline_apic __initdata; |
133 | static int __init parse_apic(char *arg) | |
134 | { | |
8b37e880 | 135 | struct apic **drv; |
1a3f239d RR |
136 | |
137 | if (!arg) | |
138 | return -EINVAL; | |
139 | ||
8b37e880 SS |
140 | for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) { |
141 | if (!strcmp((*drv)->name, arg)) { | |
142 | apic = *drv; | |
1a3f239d RR |
143 | cmdline_apic = 1; |
144 | return 0; | |
145 | } | |
146 | } | |
9a8cb626 AK |
147 | |
148 | /* Parsed again by __setup for debug/verbose */ | |
149 | return 0; | |
1a3f239d RR |
150 | } |
151 | early_param("apic", parse_apic); | |
911a62d4 | 152 | |
69c252ff | 153 | void __init default_setup_apic_routing(void) |
911a62d4 | 154 | { |
69c252ff SS |
155 | int version = apic_version[boot_cpu_physical_apicid]; |
156 | ||
157 | if (num_possible_cpus() > 8) { | |
158 | switch (boot_cpu_data.x86_vendor) { | |
159 | case X86_VENDOR_INTEL: | |
160 | if (!APIC_XAPIC(version)) { | |
161 | def_to_bigsmp = 0; | |
162 | break; | |
163 | } | |
164 | /* If P4 and above fall through */ | |
165 | case X86_VENDOR_AMD: | |
166 | def_to_bigsmp = 1; | |
167 | } | |
168 | } | |
169 | ||
b20d70b7 | 170 | #ifdef CONFIG_X86_BIGSMP |
911a62d4 | 171 | /* |
69c252ff | 172 | * This is used to switch to bigsmp mode when |
911a62d4 | 173 | * - There is no apic= option specified by the user |
27b46d76 | 174 | * - generic_apic_probe() has chosen apic_default as the sub_arch |
911a62d4 VP |
175 | * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support |
176 | */ | |
177 | ||
838312be JB |
178 | if (!cmdline_apic && apic == &apic_default) |
179 | generic_bigsmp_probe(); | |
d49c4288 | 180 | #endif |
69c252ff SS |
181 | |
182 | if (apic->setup_apic_routing) | |
183 | apic->setup_apic_routing(); | |
7db971b2 IY |
184 | |
185 | if (x86_platform.apic_post_init) | |
186 | x86_platform.apic_post_init(); | |
911a62d4 VP |
187 | } |
188 | ||
1a3f239d | 189 | void __init generic_apic_probe(void) |
9b0c5028 | 190 | { |
1a3f239d | 191 | if (!cmdline_apic) { |
8b37e880 SS |
192 | struct apic **drv; |
193 | ||
194 | for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) { | |
195 | if ((*drv)->probe()) { | |
196 | apic = *drv; | |
1a3f239d | 197 | break; |
1da177e4 LT |
198 | } |
199 | } | |
1a3f239d | 200 | /* Not visible without early console */ |
8b37e880 | 201 | if (drv == __apicdrivers_end) |
1a3f239d | 202 | panic("Didn't find an APIC driver"); |
1da177e4 | 203 | } |
c8d46cf0 | 204 | printk(KERN_INFO "Using APIC driver %s\n", apic->name); |
9b0c5028 | 205 | } |
1da177e4 | 206 | |
c460b5d3 | 207 | /* This function can switch the APIC even after the initial ->probe() */ |
306db03b | 208 | int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id) |
1da177e4 | 209 | { |
8b37e880 | 210 | struct apic **drv; |
306db03b | 211 | |
8b37e880 SS |
212 | for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) { |
213 | if (!(*drv)->acpi_madt_oem_check) | |
306db03b | 214 | continue; |
8b37e880 | 215 | if (!(*drv)->acpi_madt_oem_check(oem_id, oem_table_id)) |
306db03b IM |
216 | continue; |
217 | ||
218 | if (!cmdline_apic) { | |
8b37e880 | 219 | apic = *drv; |
306db03b IM |
220 | printk(KERN_INFO "Switched to APIC driver `%s'.\n", |
221 | apic->name); | |
9b0c5028 | 222 | } |
306db03b | 223 | return 1; |
9b0c5028 PC |
224 | } |
225 | return 0; | |
1da177e4 | 226 | } |