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11#include <linux/errno.h>
12#include <linux/threads.h>
13#include <linux/cpumask.h>
14#include <linux/string.h>
15#include <linux/kernel.h>
16#include <linux/ctype.h>
17#include <linux/init.h>
18#include <linux/hardirq.h>
19#include <linux/module.h>
20#include <asm/smp.h>
21#include <asm/apic.h>
22#include <asm/ipi.h>
23
24#ifdef CONFIG_ACPI
25#include <acpi/acpi_bus.h>
26#endif
27
28static struct apic apic_physflat;
29static struct apic apic_flat;
30
31struct apic __read_mostly *apic = &apic_flat;
32EXPORT_SYMBOL_GPL(apic);
33
34static int flat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
35{
36 return 1;
37}
38
39
40
41
42
43
44
45
46void flat_init_apic_ldr(void)
47{
48 unsigned long val;
49 unsigned long num, id;
50
51 num = smp_processor_id();
52 id = 1UL << num;
53 apic_write(APIC_DFR, APIC_DFR_FLAT);
54 val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
55 val |= SET_APIC_LOGICAL_ID(id);
56 apic_write(APIC_LDR, val);
57}
58
59static inline void _flat_send_IPI_mask(unsigned long mask, int vector)
60{
61 unsigned long flags;
62
63 local_irq_save(flags);
64 __default_send_IPI_dest_field(mask, vector, apic->dest_logical);
65 local_irq_restore(flags);
66}
67
68static void flat_send_IPI_mask(const struct cpumask *cpumask, int vector)
69{
70 unsigned long mask = cpumask_bits(cpumask)[0];
71
72 _flat_send_IPI_mask(mask, vector);
73}
74
75static void
76flat_send_IPI_mask_allbutself(const struct cpumask *cpumask, int vector)
77{
78 unsigned long mask = cpumask_bits(cpumask)[0];
79 int cpu = smp_processor_id();
80
81 if (cpu < BITS_PER_LONG)
82 clear_bit(cpu, &mask);
83
84 _flat_send_IPI_mask(mask, vector);
85}
86
87static void flat_send_IPI_allbutself(int vector)
88{
89 int cpu = smp_processor_id();
90#ifdef CONFIG_HOTPLUG_CPU
91 int hotplug = 1;
92#else
93 int hotplug = 0;
94#endif
95 if (hotplug || vector == NMI_VECTOR) {
96 if (!cpumask_equal(cpu_online_mask, cpumask_of(cpu))) {
97 unsigned long mask = cpumask_bits(cpu_online_mask)[0];
98
99 if (cpu < BITS_PER_LONG)
100 clear_bit(cpu, &mask);
101
102 _flat_send_IPI_mask(mask, vector);
103 }
104 } else if (num_online_cpus() > 1) {
105 __default_send_IPI_shortcut(APIC_DEST_ALLBUT,
106 vector, apic->dest_logical);
107 }
108}
109
110static void flat_send_IPI_all(int vector)
111{
112 if (vector == NMI_VECTOR) {
113 flat_send_IPI_mask(cpu_online_mask, vector);
114 } else {
115 __default_send_IPI_shortcut(APIC_DEST_ALLINC,
116 vector, apic->dest_logical);
117 }
118}
119
120static unsigned int flat_get_apic_id(unsigned long x)
121{
122 unsigned int id;
123
124 id = (((x)>>24) & 0xFFu);
125
126 return id;
127}
128
129static unsigned long set_apic_id(unsigned int id)
130{
131 unsigned long x;
132
133 x = ((id & 0xFFu)<<24);
134 return x;
135}
136
137static unsigned int read_xapic_id(void)
138{
139 unsigned int id;
140
141 id = flat_get_apic_id(apic_read(APIC_ID));
142 return id;
143}
144
145static int flat_apic_id_registered(void)
146{
147 return physid_isset(read_xapic_id(), phys_cpu_present_map);
148}
149
150static int flat_phys_pkg_id(int initial_apic_id, int index_msb)
151{
152 return initial_apic_id >> index_msb;
153}
154
155static int flat_probe(void)
156{
157 return 1;
158}
159
160static struct apic apic_flat = {
161 .name = "flat",
162 .probe = flat_probe,
163 .acpi_madt_oem_check = flat_acpi_madt_oem_check,
164 .apic_id_valid = default_apic_id_valid,
165 .apic_id_registered = flat_apic_id_registered,
166
167 .irq_delivery_mode = dest_LowestPrio,
168 .irq_dest_mode = 1,
169
170 .target_cpus = online_target_cpus,
171 .disable_esr = 0,
172 .dest_logical = APIC_DEST_LOGICAL,
173 .check_apicid_used = NULL,
174 .check_apicid_present = NULL,
175
176 .vector_allocation_domain = flat_vector_allocation_domain,
177 .init_apic_ldr = flat_init_apic_ldr,
178
179 .ioapic_phys_id_map = NULL,
180 .setup_apic_routing = NULL,
181 .multi_timer_check = NULL,
182 .cpu_present_to_apicid = default_cpu_present_to_apicid,
183 .apicid_to_cpu_present = NULL,
184 .setup_portio_remap = NULL,
185 .check_phys_apicid_present = default_check_phys_apicid_present,
186 .enable_apic_mode = NULL,
187 .phys_pkg_id = flat_phys_pkg_id,
188 .mps_oem_check = NULL,
189
190 .get_apic_id = flat_get_apic_id,
191 .set_apic_id = set_apic_id,
192 .apic_id_mask = 0xFFu << 24,
193
194 .cpu_mask_to_apicid_and = flat_cpu_mask_to_apicid_and,
195
196 .send_IPI_mask = flat_send_IPI_mask,
197 .send_IPI_mask_allbutself = flat_send_IPI_mask_allbutself,
198 .send_IPI_allbutself = flat_send_IPI_allbutself,
199 .send_IPI_all = flat_send_IPI_all,
200 .send_IPI_self = apic_send_IPI_self,
201
202 .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
203 .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
204 .wait_for_init_deassert = NULL,
205 .smp_callin_clear_local_apic = NULL,
206 .inquire_remote_apic = default_inquire_remote_apic,
207
208 .read = native_apic_mem_read,
209 .write = native_apic_mem_write,
210 .eoi_write = native_apic_mem_write,
211 .icr_read = native_apic_icr_read,
212 .icr_write = native_apic_icr_write,
213 .wait_icr_idle = native_apic_wait_icr_idle,
214 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
215};
216
217
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219
220
221
222static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
223{
224#ifdef CONFIG_ACPI
225
226
227
228
229
230 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
231 (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
232 printk(KERN_DEBUG "system APIC only can use physical flat");
233 return 1;
234 }
235
236 if (!strncmp(oem_id, "IBM", 3) && !strncmp(oem_table_id, "EXA", 3)) {
237 printk(KERN_DEBUG "IBM Summit detected, will use apic physical");
238 return 1;
239 }
240#endif
241
242 return 0;
243}
244
245static void physflat_send_IPI_mask(const struct cpumask *cpumask, int vector)
246{
247 default_send_IPI_mask_sequence_phys(cpumask, vector);
248}
249
250static void physflat_send_IPI_mask_allbutself(const struct cpumask *cpumask,
251 int vector)
252{
253 default_send_IPI_mask_allbutself_phys(cpumask, vector);
254}
255
256static void physflat_send_IPI_allbutself(int vector)
257{
258 default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
259}
260
261static void physflat_send_IPI_all(int vector)
262{
263 physflat_send_IPI_mask(cpu_online_mask, vector);
264}
265
266static int physflat_probe(void)
267{
268 if (apic == &apic_physflat || num_possible_cpus() > 8)
269 return 1;
270
271 return 0;
272}
273
274static struct apic apic_physflat = {
275
276 .name = "physical flat",
277 .probe = physflat_probe,
278 .acpi_madt_oem_check = physflat_acpi_madt_oem_check,
279 .apic_id_valid = default_apic_id_valid,
280 .apic_id_registered = flat_apic_id_registered,
281
282 .irq_delivery_mode = dest_Fixed,
283 .irq_dest_mode = 0,
284
285 .target_cpus = online_target_cpus,
286 .disable_esr = 0,
287 .dest_logical = 0,
288 .check_apicid_used = NULL,
289 .check_apicid_present = NULL,
290
291 .vector_allocation_domain = default_vector_allocation_domain,
292
293 .init_apic_ldr = flat_init_apic_ldr,
294
295 .ioapic_phys_id_map = NULL,
296 .setup_apic_routing = NULL,
297 .multi_timer_check = NULL,
298 .cpu_present_to_apicid = default_cpu_present_to_apicid,
299 .apicid_to_cpu_present = NULL,
300 .setup_portio_remap = NULL,
301 .check_phys_apicid_present = default_check_phys_apicid_present,
302 .enable_apic_mode = NULL,
303 .phys_pkg_id = flat_phys_pkg_id,
304 .mps_oem_check = NULL,
305
306 .get_apic_id = flat_get_apic_id,
307 .set_apic_id = set_apic_id,
308 .apic_id_mask = 0xFFu << 24,
309
310 .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and,
311
312 .send_IPI_mask = physflat_send_IPI_mask,
313 .send_IPI_mask_allbutself = physflat_send_IPI_mask_allbutself,
314 .send_IPI_allbutself = physflat_send_IPI_allbutself,
315 .send_IPI_all = physflat_send_IPI_all,
316 .send_IPI_self = apic_send_IPI_self,
317
318 .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
319 .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
320 .wait_for_init_deassert = NULL,
321 .smp_callin_clear_local_apic = NULL,
322 .inquire_remote_apic = default_inquire_remote_apic,
323
324 .read = native_apic_mem_read,
325 .write = native_apic_mem_write,
326 .eoi_write = native_apic_mem_write,
327 .icr_read = native_apic_icr_read,
328 .icr_write = native_apic_icr_write,
329 .wait_icr_idle = native_apic_wait_icr_idle,
330 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
331};
332
333
334
335
336apic_drivers(apic_physflat, apic_flat);
337
