summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/bigsmp_32.c
blob: 47a62f46afdbda3c04ffe9a756321617ca85434c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
/*
 * APIC driver for "bigsmp" XAPIC machines with more than 8 virtual CPUs.
 * Drives the local APIC in "clustered mode".
 */
#define APIC_DEFINITION 1
#include <linux/threads.h>
#include <linux/cpumask.h>
#include <asm/mpspec.h>
#include <asm/genapic.h>
#include <asm/fixmap.h>
#include <asm/apicdef.h>
#include <asm/ipi.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/dmi.h>
#include <linux/smp.h>


static inline unsigned bigsmp_get_apic_id(unsigned long x)
{
	return (x >> 24) & 0xFF;
}

#define xapic_phys_to_log_apicid(cpu) (per_cpu(x86_bios_cpu_apicid, cpu))

static inline int bigsmp_apic_id_registered(void)
{
	return 1;
}

static inline const cpumask_t *bigsmp_target_cpus(void)
{
#ifdef CONFIG_SMP
	return &cpu_online_map;
#else
	return &cpumask_of_cpu(0);
#endif
}

#define APIC_DFR_VALUE		(APIC_DFR_FLAT)

static inline unsigned long
bigsmp_check_apicid_used(physid_mask_t bitmap, int apicid)
{
	return 0;
}

static inline unsigned long bigsmp_check_apicid_present(int bit)
{
	return 1;
}

static inline unsigned long calculate_ldr(int cpu)
{
	unsigned long val, id;
	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
	id = xapic_phys_to_log_apicid(cpu);
	val |= SET_APIC_LOGICAL_ID(id);
	return val;
}

/*
 * Set up the logical destination ID.
 *
 * Intel recommends to set DFR, LDR and TPR before enabling
 * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
 * document number 292116).  So here it goes...
 */
static inline void bigsmp_init_apic_ldr(void)
{
	unsigned long val;
	int cpu = smp_processor_id();

	apic_write(APIC_DFR, APIC_DFR_VALUE);
	val = calculate_ldr(cpu);
	apic_write(APIC_LDR, val);
}

static inline void bigsmp_setup_apic_routing(void)
{
	printk("Enabling APIC mode:  %s.  Using %d I/O APICs\n",
		"Physflat", nr_ioapics);
}

static inline int bigsmp_apicid_to_node(int logical_apicid)
{
	return apicid_2_node[hard_smp_processor_id()];
}

static inline int bigsmp_cpu_present_to_apicid(int mps_cpu)
{
	if (mps_cpu < nr_cpu_ids)
		return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);

	return BAD_APICID;
}

static inline physid_mask_t bigsmp_apicid_to_cpu_present(int phys_apicid)
{
	return physid_mask_of_physid(phys_apicid);
}

extern u8 cpu_2_logical_apicid[];
/* Mapping from cpu number to logical apicid */
static inline int bigsmp_cpu_to_logical_apicid(int cpu)
{
	if (cpu >= nr_cpu_ids)
		return BAD_APICID;
	return cpu_physical_id(cpu);
}

static inline physid_mask_t bigsmp_ioapic_phys_id_map(physid_mask_t phys_map)
{
	/* For clustered we don't have a good way to do this yet - hack */
	return physids_promote(0xFFL);
}

static inline void bigsmp_setup_portio_remap(void)
{
}

static inline int bigsmp_check_phys_apicid_present(int boot_cpu_physical_apicid)
{
	return 1;
}

/* As we are using single CPU as destination, pick only one CPU here */
static inline unsigned int bigsmp_cpu_mask_to_apicid(const cpumask_t *cpumask)
{
	return bigsmp_cpu_to_logical_apicid(first_cpu(*cpumask));
}

static inline unsigned int
bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
			      const struct cpumask *andmask)
{
	int cpu;

	/*
	 * We're using fixed IRQ delivery, can only return one phys APIC ID.
	 * May as well be the first.
	 */
	for_each_cpu_and(cpu, cpumask, andmask) {
		if (cpumask_test_cpu(cpu, cpu_online_mask))
			break;
	}
	if (cpu < nr_cpu_ids)
		return bigsmp_cpu_to_logical_apicid(cpu);

	return BAD_APICID;
}

static inline int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
{
	return cpuid_apic >> index_msb;
}

static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector)
{
	default_send_IPI_mask_sequence_phys(mask, vector);
}

static inline void bigsmp_send_IPI_allbutself(int vector)
{
	default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
}

static inline void bigsmp_send_IPI_all(int vector)
{
	bigsmp_send_IPI_mask(cpu_online_mask, vector);
}

static int dmi_bigsmp; /* can be set by dmi scanners */

static int hp_ht_bigsmp(const struct dmi_system_id *d)
{
	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
	dmi_bigsmp = 1;
	return 0;
}


static const struct dmi_system_id bigsmp_dmi_table[] = {
	{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
	{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
	DMI_MATCH(DMI_BIOS_VERSION, "P44-"),}
	},

	{ hp_ht_bigsmp, "HP ProLiant DL740",
	{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
	DMI_MATCH(DMI_BIOS_VERSION, "P47-"),}
	},
	 { }
};

static void bigsmp_vector_allocation_domain(int cpu, cpumask_t *retmask)
{
	cpus_clear(*retmask);
	cpu_set(cpu, *retmask);
}

static int probe_bigsmp(void)
{
	if (def_to_bigsmp)
		dmi_bigsmp = 1;
	else
		dmi_check_system(bigsmp_dmi_table);
	return dmi_bigsmp;
}

struct genapic apic_bigsmp = {

	.name				= "bigsmp",
	.probe				= probe_bigsmp,
	.acpi_madt_oem_check		= NULL,
	.apic_id_registered		= bigsmp_apic_id_registered,

	.irq_delivery_mode		= dest_Fixed,
	/* phys delivery to target CPU: */
	.irq_dest_mode			= 0,

	.target_cpus			= bigsmp_target_cpus,
	.disable_esr			= 1,
	.dest_logical			= 0,
	.check_apicid_used		= bigsmp_check_apicid_used,
	.check_apicid_present		= bigsmp_check_apicid_present,

	.vector_allocation_domain	= bigsmp_vector_allocation_domain,
	.init_apic_ldr			= bigsmp_init_apic_ldr,

	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
	.setup_apic_routing		= bigsmp_setup_apic_routing,
	.multi_timer_check		= NULL,
	.apicid_to_node			= bigsmp_apicid_to_node,
	.cpu_to_logical_apicid		= bigsmp_cpu_to_logical_apicid,
	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
	.apicid_to_cpu_present		= bigsmp_apicid_to_cpu_present,
	.setup_portio_remap		= NULL,
	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
	.enable_apic_mode		= NULL,
	.phys_pkg_id			= bigsmp_phys_pkg_id,
	.mps_oem_check			= NULL,

	.get_apic_id			= bigsmp_get_apic_id,
	.set_apic_id			= NULL,
	.apic_id_mask			= 0xFF << 24,

	.cpu_mask_to_apicid		= bigsmp_cpu_mask_to_apicid,
	.cpu_mask_to_apicid_and		= bigsmp_cpu_mask_to_apicid_and,

	.send_IPI_mask			= bigsmp_send_IPI_mask,
	.send_IPI_mask_allbutself	= NULL,
	.send_IPI_allbutself		= bigsmp_send_IPI_allbutself,
	.send_IPI_all			= bigsmp_send_IPI_all,
	.send_IPI_self			= default_send_IPI_self,

	.wakeup_cpu			= NULL,
	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,

	.wait_for_init_deassert		= default_wait_for_init_deassert,

	.smp_callin_clear_local_apic	= NULL,
	.store_NMI_vector		= NULL,
	.inquire_remote_apic		= default_inquire_remote_apic,
};