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Commit | Line | Data |
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637cba02 | 1 | /* |
77313190 IM |
2 | * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs. |
3 | * | |
1da177e4 LT |
4 | * Drives the local APIC in "clustered mode". |
5 | */ | |
1da177e4 LT |
6 | #include <linux/threads.h> |
7 | #include <linux/cpumask.h> | |
1da177e4 | 8 | #include <linux/kernel.h> |
1da177e4 LT |
9 | #include <linux/init.h> |
10 | #include <linux/dmi.h> | |
4696ca5b | 11 | #include <linux/smp.h> |
9f4187f0 | 12 | |
77313190 IM |
13 | #include <asm/apicdef.h> |
14 | #include <asm/fixmap.h> | |
15 | #include <asm/mpspec.h> | |
16 | #include <asm/apic.h> | |
17 | #include <asm/ipi.h> | |
9f4187f0 | 18 | |
9694cd6c | 19 | static unsigned bigsmp_get_apic_id(unsigned long x) |
9f4187f0 IM |
20 | { |
21 | return (x >> 24) & 0xFF; | |
22 | } | |
23 | ||
9694cd6c | 24 | static int bigsmp_apic_id_registered(void) |
9f4187f0 IM |
25 | { |
26 | return 1; | |
27 | } | |
28 | ||
7abc0753 | 29 | static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid) |
9f4187f0 IM |
30 | { |
31 | return 0; | |
32 | } | |
33 | ||
12bf24a4 TH |
34 | static int bigsmp_early_logical_apicid(int cpu) |
35 | { | |
36 | /* on bigsmp, logical apicid is the same as physical */ | |
37 | return early_per_cpu(x86_cpu_to_apicid, cpu); | |
38 | } | |
39 | ||
9f4187f0 IM |
40 | static inline unsigned long calculate_ldr(int cpu) |
41 | { | |
42 | unsigned long val, id; | |
77313190 | 43 | |
9f4187f0 | 44 | val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; |
77313190 | 45 | id = per_cpu(x86_bios_cpu_apicid, cpu); |
9f4187f0 | 46 | val |= SET_APIC_LOGICAL_ID(id); |
77313190 | 47 | |
9f4187f0 IM |
48 | return val; |
49 | } | |
50 | ||
51 | /* | |
52 | * Set up the logical destination ID. | |
53 | * | |
54 | * Intel recommends to set DFR, LDR and TPR before enabling | |
55 | * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel | |
56 | * document number 292116). So here it goes... | |
57 | */ | |
9694cd6c | 58 | static void bigsmp_init_apic_ldr(void) |
9f4187f0 IM |
59 | { |
60 | unsigned long val; | |
61 | int cpu = smp_processor_id(); | |
62 | ||
77313190 | 63 | apic_write(APIC_DFR, APIC_DFR_FLAT); |
9f4187f0 IM |
64 | val = calculate_ldr(cpu); |
65 | apic_write(APIC_LDR, val); | |
66 | } | |
67 | ||
9694cd6c | 68 | static void bigsmp_setup_apic_routing(void) |
9f4187f0 | 69 | { |
77313190 IM |
70 | printk(KERN_INFO |
71 | "Enabling APIC mode: Physflat. Using %d I/O APICs\n", | |
72 | nr_ioapics); | |
9f4187f0 IM |
73 | } |
74 | ||
9694cd6c | 75 | static int bigsmp_cpu_present_to_apicid(int mps_cpu) |
9f4187f0 IM |
76 | { |
77 | if (mps_cpu < nr_cpu_ids) | |
78 | return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu); | |
79 | ||
80 | return BAD_APICID; | |
81 | } | |
82 | ||
7abc0753 | 83 | static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) |
9f4187f0 IM |
84 | { |
85 | /* For clustered we don't have a good way to do this yet - hack */ | |
7abc0753 | 86 | physids_promote(0xFFL, retmap); |
9f4187f0 IM |
87 | } |
88 | ||
e11dadab | 89 | static int bigsmp_check_phys_apicid_present(int phys_apicid) |
9f4187f0 IM |
90 | { |
91 | return 1; | |
92 | } | |
93 | ||
9694cd6c | 94 | static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb) |
9f4187f0 IM |
95 | { |
96 | return cpuid_apic >> index_msb; | |
97 | } | |
98 | ||
9f4187f0 IM |
99 | static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector) |
100 | { | |
43f39890 | 101 | default_send_IPI_mask_sequence_phys(mask, vector); |
9f4187f0 IM |
102 | } |
103 | ||
9694cd6c | 104 | static void bigsmp_send_IPI_allbutself(int vector) |
9f4187f0 | 105 | { |
43f39890 | 106 | default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector); |
9f4187f0 IM |
107 | } |
108 | ||
9694cd6c | 109 | static void bigsmp_send_IPI_all(int vector) |
9f4187f0 IM |
110 | { |
111 | bigsmp_send_IPI_mask(cpu_online_mask, vector); | |
112 | } | |
1da177e4 LT |
113 | |
114 | static int dmi_bigsmp; /* can be set by dmi scanners */ | |
115 | ||
1855256c | 116 | static int hp_ht_bigsmp(const struct dmi_system_id *d) |
1da177e4 | 117 | { |
1da177e4 LT |
118 | printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident); |
119 | dmi_bigsmp = 1; | |
77313190 | 120 | |
1da177e4 LT |
121 | return 0; |
122 | } | |
123 | ||
124 | ||
1855256c | 125 | static const struct dmi_system_id bigsmp_dmi_table[] = { |
637cba02 | 126 | { hp_ht_bigsmp, "HP ProLiant DL760 G2", |
77313190 IM |
127 | { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), |
128 | DMI_MATCH(DMI_BIOS_VERSION, "P44-"), | |
129 | } | |
637cba02 PC |
130 | }, |
131 | ||
132 | { hp_ht_bigsmp, "HP ProLiant DL740", | |
77313190 IM |
133 | { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), |
134 | DMI_MATCH(DMI_BIOS_VERSION, "P47-"), | |
135 | } | |
637cba02 | 136 | }, |
77313190 | 137 | { } /* NULL entry stops DMI scanning */ |
1da177e4 LT |
138 | }; |
139 | ||
af669c97 | 140 | static int probe_bigsmp(void) |
637cba02 | 141 | { |
911a62d4 | 142 | if (def_to_bigsmp) |
e0da3364 | 143 | dmi_bigsmp = 1; |
911a62d4 VP |
144 | else |
145 | dmi_check_system(bigsmp_dmi_table); | |
77313190 | 146 | |
637cba02 PC |
147 | return dmi_bigsmp; |
148 | } | |
1da177e4 | 149 | |
1a8880a1 | 150 | static struct apic apic_bigsmp = { |
d26b6d66 IM |
151 | |
152 | .name = "bigsmp", | |
153 | .probe = probe_bigsmp, | |
306db03b | 154 | .acpi_madt_oem_check = NULL, |
fa63030e | 155 | .apic_id_valid = default_apic_id_valid, |
7ed248da | 156 | .apic_id_registered = bigsmp_apic_id_registered, |
d26b6d66 | 157 | |
d8a3539e IM |
158 | .irq_delivery_mode = dest_Fixed, |
159 | /* phys delivery to target CPU: */ | |
160 | .irq_dest_mode = 0, | |
d26b6d66 | 161 | |
bf721d3a | 162 | .target_cpus = default_target_cpus, |
08125d3e | 163 | .disable_esr = 1, |
bdb1a9b6 | 164 | .dest_logical = 0, |
d1d7cae8 | 165 | .check_apicid_used = bigsmp_check_apicid_used, |
d26b6d66 | 166 | |
9d8e1066 | 167 | .vector_allocation_domain = default_vector_allocation_domain, |
a5c43296 | 168 | .init_apic_ldr = bigsmp_init_apic_ldr, |
d26b6d66 | 169 | |
d190cb87 | 170 | .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map, |
72ce0165 | 171 | .setup_apic_routing = bigsmp_setup_apic_routing, |
a21769a4 | 172 | .cpu_present_to_apicid = bigsmp_cpu_present_to_apicid, |
7abc0753 | 173 | .apicid_to_cpu_present = physid_set_mask_of_physid, |
a27a6210 | 174 | .check_phys_apicid_present = bigsmp_check_phys_apicid_present, |
cb8cc442 | 175 | .phys_pkg_id = bigsmp_phys_pkg_id, |
d26b6d66 | 176 | |
ca6c8ed4 | 177 | .get_apic_id = bigsmp_get_apic_id, |
d26b6d66 | 178 | .set_apic_id = NULL, |
94af1875 | 179 | .apic_id_mask = 0xFF << 24, |
d26b6d66 | 180 | |
6398268d | 181 | .cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and, |
d26b6d66 | 182 | |
9f4187f0 | 183 | .send_IPI_mask = bigsmp_send_IPI_mask, |
d26b6d66 | 184 | .send_IPI_mask_allbutself = NULL, |
dac5f412 IM |
185 | .send_IPI_allbutself = bigsmp_send_IPI_allbutself, |
186 | .send_IPI_all = bigsmp_send_IPI_all, | |
6b64ee02 | 187 | .send_IPI_self = default_send_IPI_self, |
d26b6d66 | 188 | |
25dc0049 | 189 | .inquire_remote_apic = default_inquire_remote_apic, |
c1eeb2de YL |
190 | |
191 | .read = native_apic_mem_read, | |
192 | .write = native_apic_mem_write, | |
2a43195d | 193 | .eoi_write = native_apic_mem_write, |
c1eeb2de YL |
194 | .icr_read = native_apic_icr_read, |
195 | .icr_write = native_apic_icr_write, | |
196 | .wait_icr_idle = native_apic_wait_icr_idle, | |
197 | .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, | |
acb8bc09 | 198 | |
12bf24a4 | 199 | .x86_32_early_logical_apicid = bigsmp_early_logical_apicid, |
d26b6d66 | 200 | }; |
107e0e0c | 201 | |
838312be | 202 | void __init generic_bigsmp_probe(void) |
69c252ff | 203 | { |
838312be | 204 | unsigned int cpu; |
69c252ff | 205 | |
838312be JB |
206 | if (!probe_bigsmp()) |
207 | return; | |
208 | ||
209 | apic = &apic_bigsmp; | |
210 | ||
211 | for_each_possible_cpu(cpu) { | |
212 | if (early_per_cpu(x86_cpu_to_logical_apicid, | |
213 | cpu) == BAD_APICID) | |
214 | continue; | |
215 | early_per_cpu(x86_cpu_to_logical_apicid, cpu) = | |
216 | bigsmp_early_logical_apicid(cpu); | |
217 | } | |
218 | ||
219 | pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name); | |
69c252ff SS |
220 | } |
221 | ||
107e0e0c | 222 | apic_driver(apic_bigsmp); |