2 * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
4 * Drives the local APIC in "clustered mode".
6 #include <linux/threads.h>
7 #include <linux/cpumask.h>
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/dmi.h>
11 #include <linux/smp.h>
13 #include <asm/apicdef.h>
14 #include <asm/fixmap.h>
15 #include <asm/mpspec.h>
19 static inline unsigned bigsmp_get_apic_id(unsigned long x
)
21 return (x
>> 24) & 0xFF;
24 static inline int bigsmp_apic_id_registered(void)
29 static inline const cpumask_t
*bigsmp_target_cpus(void)
32 return &cpu_online_map
;
34 return &cpumask_of_cpu(0);
38 static inline unsigned long
39 bigsmp_check_apicid_used(physid_mask_t bitmap
, int apicid
)
44 static inline unsigned long bigsmp_check_apicid_present(int bit
)
49 static inline unsigned long calculate_ldr(int cpu
)
51 unsigned long val
, id
;
53 val
= apic_read(APIC_LDR
) & ~APIC_LDR_MASK
;
54 id
= per_cpu(x86_bios_cpu_apicid
, cpu
);
55 val
|= SET_APIC_LOGICAL_ID(id
);
61 * Set up the logical destination ID.
63 * Intel recommends to set DFR, LDR and TPR before enabling
64 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
65 * document number 292116). So here it goes...
67 static inline void bigsmp_init_apic_ldr(void)
70 int cpu
= smp_processor_id();
72 apic_write(APIC_DFR
, APIC_DFR_FLAT
);
73 val
= calculate_ldr(cpu
);
74 apic_write(APIC_LDR
, val
);
77 static inline void bigsmp_setup_apic_routing(void)
80 "Enabling APIC mode: Physflat. Using %d I/O APICs\n",
84 static inline int bigsmp_apicid_to_node(int logical_apicid
)
86 return apicid_2_node
[hard_smp_processor_id()];
89 static inline int bigsmp_cpu_present_to_apicid(int mps_cpu
)
91 if (mps_cpu
< nr_cpu_ids
)
92 return (int) per_cpu(x86_bios_cpu_apicid
, mps_cpu
);
97 static inline physid_mask_t
bigsmp_apicid_to_cpu_present(int phys_apicid
)
99 return physid_mask_of_physid(phys_apicid
);
102 /* Mapping from cpu number to logical apicid */
103 static inline int bigsmp_cpu_to_logical_apicid(int cpu
)
105 if (cpu
>= nr_cpu_ids
)
107 return cpu_physical_id(cpu
);
110 static inline physid_mask_t
bigsmp_ioapic_phys_id_map(physid_mask_t phys_map
)
112 /* For clustered we don't have a good way to do this yet - hack */
113 return physids_promote(0xFFL
);
116 static inline void bigsmp_setup_portio_remap(void)
120 static inline int bigsmp_check_phys_apicid_present(int boot_cpu_physical_apicid
)
125 /* As we are using single CPU as destination, pick only one CPU here */
126 static inline unsigned int bigsmp_cpu_mask_to_apicid(const cpumask_t
*cpumask
)
128 return bigsmp_cpu_to_logical_apicid(first_cpu(*cpumask
));
131 static inline unsigned int
132 bigsmp_cpu_mask_to_apicid_and(const struct cpumask
*cpumask
,
133 const struct cpumask
*andmask
)
138 * We're using fixed IRQ delivery, can only return one phys APIC ID.
139 * May as well be the first.
141 for_each_cpu_and(cpu
, cpumask
, andmask
) {
142 if (cpumask_test_cpu(cpu
, cpu_online_mask
))
145 if (cpu
< nr_cpu_ids
)
146 return bigsmp_cpu_to_logical_apicid(cpu
);
151 static inline int bigsmp_phys_pkg_id(int cpuid_apic
, int index_msb
)
153 return cpuid_apic
>> index_msb
;
156 static inline void bigsmp_send_IPI_mask(const struct cpumask
*mask
, int vector
)
158 default_send_IPI_mask_sequence_phys(mask
, vector
);
161 static inline void bigsmp_send_IPI_allbutself(int vector
)
163 default_send_IPI_mask_allbutself_phys(cpu_online_mask
, vector
);
166 static inline void bigsmp_send_IPI_all(int vector
)
168 bigsmp_send_IPI_mask(cpu_online_mask
, vector
);
171 static int dmi_bigsmp
; /* can be set by dmi scanners */
173 static int hp_ht_bigsmp(const struct dmi_system_id
*d
)
175 printk(KERN_NOTICE
"%s detected: force use of apic=bigsmp\n", d
->ident
);
182 static const struct dmi_system_id bigsmp_dmi_table
[] = {
183 { hp_ht_bigsmp
, "HP ProLiant DL760 G2",
184 { DMI_MATCH(DMI_BIOS_VENDOR
, "HP"),
185 DMI_MATCH(DMI_BIOS_VERSION
, "P44-"),
189 { hp_ht_bigsmp
, "HP ProLiant DL740",
190 { DMI_MATCH(DMI_BIOS_VENDOR
, "HP"),
191 DMI_MATCH(DMI_BIOS_VERSION
, "P47-"),
194 { } /* NULL entry stops DMI scanning */
197 static void bigsmp_vector_allocation_domain(int cpu
, cpumask_t
*retmask
)
199 cpus_clear(*retmask
);
200 cpu_set(cpu
, *retmask
);
203 static int probe_bigsmp(void)
208 dmi_check_system(bigsmp_dmi_table
);
213 struct apic apic_bigsmp
= {
216 .probe
= probe_bigsmp
,
217 .acpi_madt_oem_check
= NULL
,
218 .apic_id_registered
= bigsmp_apic_id_registered
,
220 .irq_delivery_mode
= dest_Fixed
,
221 /* phys delivery to target CPU: */
224 .target_cpus
= bigsmp_target_cpus
,
227 .check_apicid_used
= bigsmp_check_apicid_used
,
228 .check_apicid_present
= bigsmp_check_apicid_present
,
230 .vector_allocation_domain
= bigsmp_vector_allocation_domain
,
231 .init_apic_ldr
= bigsmp_init_apic_ldr
,
233 .ioapic_phys_id_map
= bigsmp_ioapic_phys_id_map
,
234 .setup_apic_routing
= bigsmp_setup_apic_routing
,
235 .multi_timer_check
= NULL
,
236 .apicid_to_node
= bigsmp_apicid_to_node
,
237 .cpu_to_logical_apicid
= bigsmp_cpu_to_logical_apicid
,
238 .cpu_present_to_apicid
= bigsmp_cpu_present_to_apicid
,
239 .apicid_to_cpu_present
= bigsmp_apicid_to_cpu_present
,
240 .setup_portio_remap
= NULL
,
241 .check_phys_apicid_present
= bigsmp_check_phys_apicid_present
,
242 .enable_apic_mode
= NULL
,
243 .phys_pkg_id
= bigsmp_phys_pkg_id
,
244 .mps_oem_check
= NULL
,
246 .get_apic_id
= bigsmp_get_apic_id
,
248 .apic_id_mask
= 0xFF << 24,
250 .cpu_mask_to_apicid
= bigsmp_cpu_mask_to_apicid
,
251 .cpu_mask_to_apicid_and
= bigsmp_cpu_mask_to_apicid_and
,
253 .send_IPI_mask
= bigsmp_send_IPI_mask
,
254 .send_IPI_mask_allbutself
= NULL
,
255 .send_IPI_allbutself
= bigsmp_send_IPI_allbutself
,
256 .send_IPI_all
= bigsmp_send_IPI_all
,
257 .send_IPI_self
= default_send_IPI_self
,
259 .trampoline_phys_low
= DEFAULT_TRAMPOLINE_PHYS_LOW
,
260 .trampoline_phys_high
= DEFAULT_TRAMPOLINE_PHYS_HIGH
,
262 .wait_for_init_deassert
= default_wait_for_init_deassert
,
264 .smp_callin_clear_local_apic
= NULL
,
265 .inquire_remote_apic
= default_inquire_remote_apic
,
267 .read
= native_apic_mem_read
,
268 .write
= native_apic_mem_write
,
269 .icr_read
= native_apic_icr_read
,
270 .icr_write
= native_apic_icr_write
,
271 .wait_icr_idle
= native_apic_wait_icr_idle
,
272 .safe_wait_icr_idle
= native_safe_apic_wait_icr_idle
,