1/*
  2 * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
  3 *
  4 * Drives the local APIC in "clustered mode".
  5 */
  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>
 12
 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>
 18
 19static unsigned bigsmp_get_apic_id(unsigned long x)
 20{
 21	return (x >> 24) & 0xFF;
 22}
 23
 24static int bigsmp_apic_id_registered(void)
 25{
 26	return 1;
 27}
 28
 29static const struct cpumask *bigsmp_target_cpus(void)
 30{
 31#ifdef CONFIG_SMP
 32	return cpu_online_mask;
 33#else
 34	return cpumask_of(0);
 35#endif
 36}
 37
 38static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
 39{
 40	return 0;
 41}
 42
 43static unsigned long bigsmp_check_apicid_present(int bit)
 44{
 45	return 1;
 46}
 47
 48static int bigsmp_early_logical_apicid(int cpu)
 49{
 50	/* on bigsmp, logical apicid is the same as physical */
 51	return early_per_cpu(x86_cpu_to_apicid, cpu);
 52}
 53
 54static inline unsigned long calculate_ldr(int cpu)
 55{
 56	unsigned long val, id;
 57
 58	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
 59	id = per_cpu(x86_bios_cpu_apicid, cpu);
 60	val |= SET_APIC_LOGICAL_ID(id);
 61
 62	return val;
 63}
 64
 65/*
 66 * Set up the logical destination ID.
 67 *
 68 * Intel recommends to set DFR, LDR and TPR before enabling
 69 * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
 70 * document number 292116).  So here it goes...
 71 */
 72static void bigsmp_init_apic_ldr(void)
 73{
 74	unsigned long val;
 75	int cpu = smp_processor_id();
 76
 77	apic_write(APIC_DFR, APIC_DFR_FLAT);
 78	val = calculate_ldr(cpu);
 79	apic_write(APIC_LDR, val);
 80}
 81
 82static void bigsmp_setup_apic_routing(void)
 83{
 84	printk(KERN_INFO
 85		"Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
 86		nr_ioapics);
 87}
 88
 89static int bigsmp_cpu_present_to_apicid(int mps_cpu)
 90{
 91	if (mps_cpu < nr_cpu_ids)
 92		return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
 93
 94	return BAD_APICID;
 95}
 96
 97static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 98{
 99	/* For clustered we don't have a good way to do this yet - hack */
100	physids_promote(0xFFL, retmap);
101}
102
103static int bigsmp_check_phys_apicid_present(int phys_apicid)
104{
105	return 1;
106}
107
108/* As we are using single CPU as destination, pick only one CPU here */
109static unsigned int bigsmp_cpu_mask_to_apicid(const struct cpumask *cpumask)
110{
111	int cpu = cpumask_first(cpumask);
112
113	if (cpu < nr_cpu_ids)
114		return cpu_physical_id(cpu);
115	return BAD_APICID;
116}
117
118static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
119			      const struct cpumask *andmask)
120{
121	int cpu;
122
123	/*
124	 * We're using fixed IRQ delivery, can only return one phys APIC ID.
125	 * May as well be the first.
126	 */
127	for_each_cpu_and(cpu, cpumask, andmask) {
128		if (cpumask_test_cpu(cpu, cpu_online_mask))
129			return cpu_physical_id(cpu);
130	}
131	return BAD_APICID;
132}
133
134static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
135{
136	return cpuid_apic >> index_msb;
137}
138
139static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector)
140{
141	default_send_IPI_mask_sequence_phys(mask, vector);
142}
143
144static void bigsmp_send_IPI_allbutself(int vector)
145{
146	default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
147}
148
149static void bigsmp_send_IPI_all(int vector)
150{
151	bigsmp_send_IPI_mask(cpu_online_mask, vector);
152}
153
154static int dmi_bigsmp; /* can be set by dmi scanners */
155
156static int hp_ht_bigsmp(const struct dmi_system_id *d)
157{
158	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
159	dmi_bigsmp = 1;
160
161	return 0;
162}
163
164
165static const struct dmi_system_id bigsmp_dmi_table[] = {
166	{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
167		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
168			DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
169		}
170	},
171
172	{ hp_ht_bigsmp, "HP ProLiant DL740",
173		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
174			DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
175		}
176	},
177	{ } /* NULL entry stops DMI scanning */
178};
179
180static void bigsmp_vector_allocation_domain(int cpu, struct cpumask *retmask)
181{
182	cpumask_clear(retmask);
183	cpumask_set_cpu(cpu, retmask);
184}
185
186static int probe_bigsmp(void)
187{
188	if (def_to_bigsmp)
189		dmi_bigsmp = 1;
190	else
191		dmi_check_system(bigsmp_dmi_table);
192
193	return dmi_bigsmp;
194}
195
196static struct apic apic_bigsmp = {
197
198	.name				= "bigsmp",
199	.probe				= probe_bigsmp,
200	.acpi_madt_oem_check		= NULL,
201	.apic_id_valid			= default_apic_id_valid,
202	.apic_id_registered		= bigsmp_apic_id_registered,
203
204	.irq_delivery_mode		= dest_Fixed,
205	/* phys delivery to target CPU: */
206	.irq_dest_mode			= 0,
207
208	.target_cpus			= bigsmp_target_cpus,
209	.disable_esr			= 1,
210	.dest_logical			= 0,
211	.check_apicid_used		= bigsmp_check_apicid_used,
212	.check_apicid_present		= bigsmp_check_apicid_present,
213
214	.vector_allocation_domain	= bigsmp_vector_allocation_domain,
215	.init_apic_ldr			= bigsmp_init_apic_ldr,
216
217	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
218	.setup_apic_routing		= bigsmp_setup_apic_routing,
219	.multi_timer_check		= NULL,
220	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
221	.apicid_to_cpu_present		= physid_set_mask_of_physid,
222	.setup_portio_remap		= NULL,
223	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
224	.enable_apic_mode		= NULL,
225	.phys_pkg_id			= bigsmp_phys_pkg_id,
226	.mps_oem_check			= NULL,
227
228	.get_apic_id			= bigsmp_get_apic_id,
229	.set_apic_id			= NULL,
230	.apic_id_mask			= 0xFF << 24,
231
232	.cpu_mask_to_apicid		= bigsmp_cpu_mask_to_apicid,
233	.cpu_mask_to_apicid_and		= bigsmp_cpu_mask_to_apicid_and,
234
235	.send_IPI_mask			= bigsmp_send_IPI_mask,
 
236	.send_IPI_mask_allbutself	= NULL,
237	.send_IPI_allbutself		= bigsmp_send_IPI_allbutself,
238	.send_IPI_all			= bigsmp_send_IPI_all,
239	.send_IPI_self			= default_send_IPI_self,
240
241	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
242	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
243
244	.wait_for_init_deassert		= default_wait_for_init_deassert,
245
246	.smp_callin_clear_local_apic	= NULL,
247	.inquire_remote_apic		= default_inquire_remote_apic,
248
249	.read				= native_apic_mem_read,
250	.write				= native_apic_mem_write,
251	.eoi_write			= native_apic_mem_write,
252	.icr_read			= native_apic_icr_read,
253	.icr_write			= native_apic_icr_write,
254	.wait_icr_idle			= native_apic_wait_icr_idle,
255	.safe_wait_icr_idle		= native_safe_apic_wait_icr_idle,
256
257	.x86_32_early_logical_apicid	= bigsmp_early_logical_apicid,
258};
259
260void __init generic_bigsmp_probe(void)
261{
262	unsigned int cpu;
263
264	if (!probe_bigsmp())
265		return;
266
267	apic = &apic_bigsmp;
268
269	for_each_possible_cpu(cpu) {
270		if (early_per_cpu(x86_cpu_to_logical_apicid,
271				  cpu) == BAD_APICID)
272			continue;
273		early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
274			bigsmp_early_logical_apicid(cpu);
275	}
276
277	pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name);
278}
279
280apic_driver(apic_bigsmp);

  1/*
  2 * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
  3 *
  4 * Drives the local APIC in "clustered mode".
  5 */
  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>
 12
 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>
 18
 19static unsigned bigsmp_get_apic_id(unsigned long x)
 20{
 21	return (x >> 24) & 0xFF;
 22}
 23
 24static int bigsmp_apic_id_registered(void)
 25{
 26	return 1;
 27}
 28
 
 
 
 
 
 
 
 
 
 29static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
 30{
 31	return 0;
 32}
 33
 
 
 
 
 
 34static 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
 40static inline unsigned long calculate_ldr(int cpu)
 41{
 42	unsigned long val, id;
 43
 44	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
 45	id = per_cpu(x86_bios_cpu_apicid, cpu);
 46	val |= SET_APIC_LOGICAL_ID(id);
 47
 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 */
 58static void bigsmp_init_apic_ldr(void)
 59{
 60	unsigned long val;
 61	int cpu = smp_processor_id();
 62
 63	apic_write(APIC_DFR, APIC_DFR_FLAT);
 64	val = calculate_ldr(cpu);
 65	apic_write(APIC_LDR, val);
 66}
 67
 68static void bigsmp_setup_apic_routing(void)
 69{
 70	printk(KERN_INFO
 71		"Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
 72		nr_ioapics);
 73}
 74
 75static int bigsmp_cpu_present_to_apicid(int mps_cpu)
 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
 83static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 84{
 85	/* For clustered we don't have a good way to do this yet - hack */
 86	physids_promote(0xFFL, retmap);
 87}
 88
 89static int bigsmp_check_phys_apicid_present(int phys_apicid)
 90{
 91	return 1;
 92}
 93
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 94static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
 95{
 96	return cpuid_apic >> index_msb;
 97}
 98
 
 
 
 
 
 99static void bigsmp_send_IPI_allbutself(int vector)
100{
101	default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
102}
103
104static void bigsmp_send_IPI_all(int vector)
105{
106	default_send_IPI_mask_sequence_phys(cpu_online_mask, vector);
107}
108
109static int dmi_bigsmp; /* can be set by dmi scanners */
110
111static int hp_ht_bigsmp(const struct dmi_system_id *d)
112{
113	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
114	dmi_bigsmp = 1;
115
116	return 0;
117}
118
119
120static const struct dmi_system_id bigsmp_dmi_table[] = {
121	{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
122		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
123			DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
124		}
125	},
126
127	{ hp_ht_bigsmp, "HP ProLiant DL740",
128		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
129			DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
130		}
131	},
132	{ } /* NULL entry stops DMI scanning */
133};
134
 
 
 
 
 
 
135static int probe_bigsmp(void)
136{
137	if (def_to_bigsmp)
138		dmi_bigsmp = 1;
139	else
140		dmi_check_system(bigsmp_dmi_table);
141
142	return dmi_bigsmp;
143}
144
145static struct apic apic_bigsmp = {
146
147	.name				= "bigsmp",
148	.probe				= probe_bigsmp,
149	.acpi_madt_oem_check		= NULL,
150	.apic_id_valid			= default_apic_id_valid,
151	.apic_id_registered		= bigsmp_apic_id_registered,
152
153	.irq_delivery_mode		= dest_Fixed,
154	/* phys delivery to target CPU: */
155	.irq_dest_mode			= 0,
156
157	.target_cpus			= default_target_cpus,
158	.disable_esr			= 1,
159	.dest_logical			= 0,
160	.check_apicid_used		= bigsmp_check_apicid_used,
 
161
162	.vector_allocation_domain	= default_vector_allocation_domain,
163	.init_apic_ldr			= bigsmp_init_apic_ldr,
164
165	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
166	.setup_apic_routing		= bigsmp_setup_apic_routing,
 
167	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
168	.apicid_to_cpu_present		= physid_set_mask_of_physid,
 
169	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
 
170	.phys_pkg_id			= bigsmp_phys_pkg_id,
 
171
172	.get_apic_id			= bigsmp_get_apic_id,
173	.set_apic_id			= NULL,
174	.apic_id_mask			= 0xFF << 24,
175
176	.cpu_mask_to_apicid_and		= default_cpu_mask_to_apicid_and,
 
177
178	.send_IPI			= default_send_IPI_single_phys,
179	.send_IPI_mask			= default_send_IPI_mask_sequence_phys,
180	.send_IPI_mask_allbutself	= NULL,
181	.send_IPI_allbutself		= bigsmp_send_IPI_allbutself,
182	.send_IPI_all			= bigsmp_send_IPI_all,
183	.send_IPI_self			= default_send_IPI_self,
184
 
 
 
 
 
 
185	.inquire_remote_apic		= default_inquire_remote_apic,
186
187	.read				= native_apic_mem_read,
188	.write				= native_apic_mem_write,
189	.eoi_write			= native_apic_mem_write,
190	.icr_read			= native_apic_icr_read,
191	.icr_write			= native_apic_icr_write,
192	.wait_icr_idle			= native_apic_wait_icr_idle,
193	.safe_wait_icr_idle		= native_safe_apic_wait_icr_idle,
194
195	.x86_32_early_logical_apicid	= bigsmp_early_logical_apicid,
196};
197
198void __init generic_bigsmp_probe(void)
199{
200	unsigned int cpu;
201
202	if (!probe_bigsmp())
203		return;
204
205	apic = &apic_bigsmp;
206
207	for_each_possible_cpu(cpu) {
208		if (early_per_cpu(x86_cpu_to_logical_apicid,
209				  cpu) == BAD_APICID)
210			continue;
211		early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
212			bigsmp_early_logical_apicid(cpu);
213	}
214
215	pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name);
216}
217
218apic_driver(apic_bigsmp);