acpi_pad: build only on X86
[linux-2.6/linux-acpi-2.6.git] / arch / x86 / kernel / apic / probe_32.c
blob0c0182cc947d0ac95faf54b76e83b1472c67af15
1 /*
2 * Default generic APIC driver. This handles up to 8 CPUs.
4 * Copyright 2003 Andi Kleen, SuSE Labs.
5 * Subject to the GNU Public License, v.2
7 * Generic x86 APIC driver probe layer.
8 */
9 #include <linux/threads.h>
10 #include <linux/cpumask.h>
11 #include <linux/module.h>
12 #include <linux/string.h>
13 #include <linux/kernel.h>
14 #include <linux/ctype.h>
15 #include <linux/init.h>
16 #include <linux/errno.h>
17 #include <asm/fixmap.h>
18 #include <asm/mpspec.h>
19 #include <asm/apicdef.h>
20 #include <asm/apic.h>
21 #include <asm/setup.h>
23 #include <linux/smp.h>
24 #include <asm/ipi.h>
26 #include <linux/interrupt.h>
27 #include <asm/acpi.h>
28 #include <asm/e820.h>
30 #ifdef CONFIG_HOTPLUG_CPU
31 #define DEFAULT_SEND_IPI (1)
32 #else
33 #define DEFAULT_SEND_IPI (0)
34 #endif
36 int no_broadcast = DEFAULT_SEND_IPI;
38 static __init int no_ipi_broadcast(char *str)
40 get_option(&str, &no_broadcast);
41 pr_info("Using %s mode\n",
42 no_broadcast ? "No IPI Broadcast" : "IPI Broadcast");
43 return 1;
45 __setup("no_ipi_broadcast=", no_ipi_broadcast);
47 static int __init print_ipi_mode(void)
49 pr_info("Using IPI %s mode\n",
50 no_broadcast ? "No-Shortcut" : "Shortcut");
51 return 0;
53 late_initcall(print_ipi_mode);
55 void default_setup_apic_routing(void)
57 #ifdef CONFIG_X86_IO_APIC
58 printk(KERN_INFO
59 "Enabling APIC mode: Flat. Using %d I/O APICs\n",
60 nr_ioapics);
61 #endif
64 static void default_vector_allocation_domain(int cpu, struct cpumask *retmask)
67 * Careful. Some cpus do not strictly honor the set of cpus
68 * specified in the interrupt destination when using lowest
69 * priority interrupt delivery mode.
71 * In particular there was a hyperthreading cpu observed to
72 * deliver interrupts to the wrong hyperthread when only one
73 * hyperthread was specified in the interrupt desitination.
75 cpumask_clear(retmask);
76 cpumask_bits(retmask)[0] = APIC_ALL_CPUS;
79 /* should be called last. */
80 static int probe_default(void)
82 return 1;
85 struct apic apic_default = {
87 .name = "default",
88 .probe = probe_default,
89 .acpi_madt_oem_check = NULL,
90 .apic_id_registered = default_apic_id_registered,
92 .irq_delivery_mode = dest_LowestPrio,
93 /* logical delivery broadcast to all CPUs: */
94 .irq_dest_mode = 1,
96 .target_cpus = default_target_cpus,
97 .disable_esr = 0,
98 .dest_logical = APIC_DEST_LOGICAL,
99 .check_apicid_used = default_check_apicid_used,
100 .check_apicid_present = default_check_apicid_present,
102 .vector_allocation_domain = default_vector_allocation_domain,
103 .init_apic_ldr = default_init_apic_ldr,
105 .ioapic_phys_id_map = default_ioapic_phys_id_map,
106 .setup_apic_routing = default_setup_apic_routing,
107 .multi_timer_check = NULL,
108 .apicid_to_node = default_apicid_to_node,
109 .cpu_to_logical_apicid = default_cpu_to_logical_apicid,
110 .cpu_present_to_apicid = default_cpu_present_to_apicid,
111 .apicid_to_cpu_present = default_apicid_to_cpu_present,
112 .setup_portio_remap = NULL,
113 .check_phys_apicid_present = default_check_phys_apicid_present,
114 .enable_apic_mode = NULL,
115 .phys_pkg_id = default_phys_pkg_id,
116 .mps_oem_check = NULL,
118 .get_apic_id = default_get_apic_id,
119 .set_apic_id = NULL,
120 .apic_id_mask = 0x0F << 24,
122 .cpu_mask_to_apicid = default_cpu_mask_to_apicid,
123 .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and,
125 .send_IPI_mask = default_send_IPI_mask_logical,
126 .send_IPI_mask_allbutself = default_send_IPI_mask_allbutself_logical,
127 .send_IPI_allbutself = default_send_IPI_allbutself,
128 .send_IPI_all = default_send_IPI_all,
129 .send_IPI_self = default_send_IPI_self,
131 .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
132 .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
134 .wait_for_init_deassert = default_wait_for_init_deassert,
136 .smp_callin_clear_local_apic = NULL,
137 .inquire_remote_apic = default_inquire_remote_apic,
139 .read = native_apic_mem_read,
140 .write = native_apic_mem_write,
141 .icr_read = native_apic_icr_read,
142 .icr_write = native_apic_icr_write,
143 .wait_icr_idle = native_apic_wait_icr_idle,
144 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
147 extern struct apic apic_numaq;
148 extern struct apic apic_summit;
149 extern struct apic apic_bigsmp;
150 extern struct apic apic_es7000;
151 extern struct apic apic_es7000_cluster;
153 struct apic *apic = &apic_default;
154 EXPORT_SYMBOL_GPL(apic);
156 static struct apic *apic_probe[] __initdata = {
157 #ifdef CONFIG_X86_NUMAQ
158 &apic_numaq,
159 #endif
160 #ifdef CONFIG_X86_SUMMIT
161 &apic_summit,
162 #endif
163 #ifdef CONFIG_X86_BIGSMP
164 &apic_bigsmp,
165 #endif
166 #ifdef CONFIG_X86_ES7000
167 &apic_es7000,
168 &apic_es7000_cluster,
169 #endif
170 &apic_default, /* must be last */
171 NULL,
174 static int cmdline_apic __initdata;
175 static int __init parse_apic(char *arg)
177 int i;
179 if (!arg)
180 return -EINVAL;
182 for (i = 0; apic_probe[i]; i++) {
183 if (!strcmp(apic_probe[i]->name, arg)) {
184 apic = apic_probe[i];
185 cmdline_apic = 1;
186 return 0;
190 /* Parsed again by __setup for debug/verbose */
191 return 0;
193 early_param("apic", parse_apic);
195 void __init generic_bigsmp_probe(void)
197 #ifdef CONFIG_X86_BIGSMP
199 * This routine is used to switch to bigsmp mode when
200 * - There is no apic= option specified by the user
201 * - generic_apic_probe() has chosen apic_default as the sub_arch
202 * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
205 if (!cmdline_apic && apic == &apic_default) {
206 if (apic_bigsmp.probe()) {
207 apic = &apic_bigsmp;
208 printk(KERN_INFO "Overriding APIC driver with %s\n",
209 apic->name);
212 #endif
215 void __init generic_apic_probe(void)
217 if (!cmdline_apic) {
218 int i;
219 for (i = 0; apic_probe[i]; i++) {
220 if (apic_probe[i]->probe()) {
221 apic = apic_probe[i];
222 break;
225 /* Not visible without early console */
226 if (!apic_probe[i])
227 panic("Didn't find an APIC driver");
229 printk(KERN_INFO "Using APIC driver %s\n", apic->name);
232 /* These functions can switch the APIC even after the initial ->probe() */
234 int __init
235 generic_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
237 int i;
239 for (i = 0; apic_probe[i]; ++i) {
240 if (!apic_probe[i]->mps_oem_check)
241 continue;
242 if (!apic_probe[i]->mps_oem_check(mpc, oem, productid))
243 continue;
245 if (!cmdline_apic) {
246 apic = apic_probe[i];
247 printk(KERN_INFO "Switched to APIC driver `%s'.\n",
248 apic->name);
250 return 1;
252 return 0;
255 int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
257 int i;
259 for (i = 0; apic_probe[i]; ++i) {
260 if (!apic_probe[i]->acpi_madt_oem_check)
261 continue;
262 if (!apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id))
263 continue;
265 if (!cmdline_apic) {
266 apic = apic_probe[i];
267 printk(KERN_INFO "Switched to APIC driver `%s'.\n",
268 apic->name);
270 return 1;
272 return 0;