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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/hardirq.h>
18#include <linux/module.h>
19#include <asm/smp.h>
20#include <asm/apic.h>
21#include <asm/ipi.h>
22
23#ifdef CONFIG_ACPI
24#include <acpi/acpi_bus.h>
25#endif
26
27static struct apic apic_physflat;
28static struct apic apic_flat;
29
30struct apic __read_mostly *apic = &apic_flat;
31EXPORT_SYMBOL_GPL(apic);
32
33static int flat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
34{
35 return 1;
36}
37
38
39
40
41
42
43
44
45void flat_init_apic_ldr(void)
46{
47 unsigned long val;
48 unsigned long num, id;
49
50 num = smp_processor_id();
51 id = 1UL << num;
52 apic_write(APIC_DFR, APIC_DFR_FLAT);
53 val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
54 val |= SET_APIC_LOGICAL_ID(id);
55 apic_write(APIC_LDR, val);
56}
57
58static inline void _flat_send_IPI_mask(unsigned long mask, int vector)
59{
60 unsigned long flags;
61
62 local_irq_save(flags);
63 __default_send_IPI_dest_field(mask, vector, apic->dest_logical);
64 local_irq_restore(flags);
65}
66
67static void flat_send_IPI_mask(const struct cpumask *cpumask, int vector)
68{
69 unsigned long mask = cpumask_bits(cpumask)[0];
70
71 _flat_send_IPI_mask(mask, vector);
72}
73
74static void
75flat_send_IPI_mask_allbutself(const struct cpumask *cpumask, int vector)
76{
77 unsigned long mask = cpumask_bits(cpumask)[0];
78 int cpu = smp_processor_id();
79
80 if (cpu < BITS_PER_LONG)
81 clear_bit(cpu, &mask);
82
83 _flat_send_IPI_mask(mask, vector);
84}
85
86static void flat_send_IPI_allbutself(int vector)
87{
88 int cpu = smp_processor_id();
89#ifdef CONFIG_HOTPLUG_CPU
90 int hotplug = 1;
91#else
92 int hotplug = 0;
93#endif
94 if (hotplug || vector == NMI_VECTOR) {
95 if (!cpumask_equal(cpu_online_mask, cpumask_of(cpu))) {
96 unsigned long mask = cpumask_bits(cpu_online_mask)[0];
97
98 if (cpu < BITS_PER_LONG)
99 clear_bit(cpu, &mask);
100
101 _flat_send_IPI_mask(mask, vector);
102 }
103 } else if (num_online_cpus() > 1) {
104 __default_send_IPI_shortcut(APIC_DEST_ALLBUT,
105 vector, apic->dest_logical);
106 }
107}
108
109static void flat_send_IPI_all(int vector)
110{
111 if (vector == NMI_VECTOR) {
112 flat_send_IPI_mask(cpu_online_mask, vector);
113 } else {
114 __default_send_IPI_shortcut(APIC_DEST_ALLINC,
115 vector, apic->dest_logical);
116 }
117}
118
119static unsigned int flat_get_apic_id(unsigned long x)
120{
121 unsigned int id;
122
123 id = (((x)>>24) & 0xFFu);
124
125 return id;
126}
127
128static unsigned long set_apic_id(unsigned int id)
129{
130 unsigned long x;
131
132 x = ((id & 0xFFu)<<24);
133 return x;
134}
135
136static unsigned int read_xapic_id(void)
137{
138 unsigned int id;
139
140 id = flat_get_apic_id(apic_read(APIC_ID));
141 return id;
142}
143
144static int flat_apic_id_registered(void)
145{
146 return physid_isset(read_xapic_id(), phys_cpu_present_map);
147}
148
149static int flat_phys_pkg_id(int initial_apic_id, int index_msb)
150{
151 return initial_apic_id >> index_msb;
152}
153
154static int flat_probe(void)
155{
156 return 1;
157}
158
159static struct apic apic_flat = {
160 .name = "flat",
161 .probe = flat_probe,
162 .acpi_madt_oem_check = flat_acpi_madt_oem_check,
163 .apic_id_valid = default_apic_id_valid,
164 .apic_id_registered = flat_apic_id_registered,
165
166 .irq_delivery_mode = dest_LowestPrio,
167 .irq_dest_mode = 1,
168
169 .target_cpus = online_target_cpus,
170 .disable_esr = 0,
171 .dest_logical = APIC_DEST_LOGICAL,
172 .check_apicid_used = NULL,
173 .check_apicid_present = NULL,
174
175 .vector_allocation_domain = flat_vector_allocation_domain,
176 .init_apic_ldr = flat_init_apic_ldr,
177
178 .ioapic_phys_id_map = NULL,
179 .setup_apic_routing = NULL,
180 .multi_timer_check = NULL,
181 .cpu_present_to_apicid = default_cpu_present_to_apicid,
182 .apicid_to_cpu_present = NULL,
183 .setup_portio_remap = NULL,
184 .check_phys_apicid_present = default_check_phys_apicid_present,
185 .enable_apic_mode = NULL,
186 .phys_pkg_id = flat_phys_pkg_id,
187 .mps_oem_check = NULL,
188
189 .get_apic_id = flat_get_apic_id,
190 .set_apic_id = set_apic_id,
191 .apic_id_mask = 0xFFu << 24,
192
193 .cpu_mask_to_apicid_and = flat_cpu_mask_to_apicid_and,
194
195 .send_IPI_mask = flat_send_IPI_mask,
196 .send_IPI_mask_allbutself = flat_send_IPI_mask_allbutself,
197 .send_IPI_allbutself = flat_send_IPI_allbutself,
198 .send_IPI_all = flat_send_IPI_all,
199 .send_IPI_self = apic_send_IPI_self,
200
201 .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
202 .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
203 .wait_for_init_deassert = NULL,
204 .smp_callin_clear_local_apic = NULL,
205 .inquire_remote_apic = default_inquire_remote_apic,
206
207 .read = native_apic_mem_read,
208 .write = native_apic_mem_write,
209 .eoi_write = native_apic_mem_write,
210 .icr_read = native_apic_icr_read,
211 .icr_write = native_apic_icr_write,
212 .wait_icr_idle = native_apic_wait_icr_idle,
213 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
214};
215
216
217
218
219
220
221static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
222{
223#ifdef CONFIG_ACPI
224
225
226
227
228
229 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
230 (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
231 printk(KERN_DEBUG "system APIC only can use physical flat");
232 return 1;
233 }
234
235 if (!strncmp(oem_id, "IBM", 3) && !strncmp(oem_table_id, "EXA", 3)) {
236 printk(KERN_DEBUG "IBM Summit detected, will use apic physical");
237 return 1;
238 }
239#endif
240
241 return 0;
242}
243
244static void physflat_send_IPI_mask(const struct cpumask *cpumask, int vector)
245{
246 default_send_IPI_mask_sequence_phys(cpumask, vector);
247}
248
249static void physflat_send_IPI_mask_allbutself(const struct cpumask *cpumask,
250 int vector)
251{
252 default_send_IPI_mask_allbutself_phys(cpumask, vector);
253}
254
255static void physflat_send_IPI_allbutself(int vector)
256{
257 default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
258}
259
260static void physflat_send_IPI_all(int vector)
261{
262 physflat_send_IPI_mask(cpu_online_mask, vector);
263}
264
265static int physflat_probe(void)
266{
267 if (apic == &apic_physflat ||
268 (num_possible_cpus() + rh_invalid_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
