1/*
  2 * This file is subject to the terms and conditions of the GNU General Public
  3 * License.  See the file "COPYING" in the main directory of this archive
  4 * for more details.
  5 *
  6 * Numascale NumaConnect-Specific APIC Code
  7 *
  8 * Copyright (C) 2011 Numascale AS. All rights reserved.
  9 *
 10 * Send feedback to <support@numascale.com>
 11 *
 12 */
 13#include <linux/types.h>
 14#include <linux/init.h>
 15#include <linux/pgtable.h>
 16
 17#include <asm/numachip/numachip.h>
 18#include <asm/numachip/numachip_csr.h>
 19
 20
 21#include "local.h"
 22
 23u8 numachip_system __read_mostly;
 24static const struct apic apic_numachip1;
 25static const struct apic apic_numachip2;
 26static void (*numachip_apic_icr_write)(int apicid, unsigned int val) __read_mostly;
 27
 28static u32 numachip1_get_apic_id(u32 x)
 29{
 30	unsigned long value;
 31	unsigned int id = (x >> 24) & 0xff;
 32
 33	if (static_cpu_has(X86_FEATURE_NODEID_MSR)) {
 34		rdmsrl(MSR_FAM10H_NODE_ID, value);
 35		id |= (value << 2) & 0xff00;
 36	}
 37
 38	return id;
 39}
 40
 41static u32 numachip2_get_apic_id(u32 x)
 42{
 43	u64 mcfg;
 44
 45	rdmsrl(MSR_FAM10H_MMIO_CONF_BASE, mcfg);
 46	return ((mcfg >> (28 - 8)) & 0xfff00) | (x >> 24);
 47}
 48
 49static void numachip1_apic_icr_write(int apicid, unsigned int val)
 50{
 51	write_lcsr(CSR_G3_EXT_IRQ_GEN, (apicid << 16) | val);
 52}
 53
 54static void numachip2_apic_icr_write(int apicid, unsigned int val)
 55{
 56	numachip2_write32_lcsr(NUMACHIP2_APIC_ICR, (apicid << 12) | val);
 57}
 58
 59static int numachip_wakeup_secondary(u32 phys_apicid, unsigned long start_rip)
 60{
 61	numachip_apic_icr_write(phys_apicid, APIC_DM_INIT);
 62	numachip_apic_icr_write(phys_apicid, APIC_DM_STARTUP |
 63		(start_rip >> 12));
 64
 65	return 0;
 66}
 67
 68static void numachip_send_IPI_one(int cpu, int vector)
 69{
 70	int local_apicid, apicid = per_cpu(x86_cpu_to_apicid, cpu);
 71	unsigned int dmode;
 72
 73	preempt_disable();
 74	local_apicid = __this_cpu_read(x86_cpu_to_apicid);
 75
 76	/* Send via local APIC where non-local part matches */
 77	if (!((apicid ^ local_apicid) >> NUMACHIP_LAPIC_BITS)) {
 78		unsigned long flags;
 79
 80		local_irq_save(flags);
 81		__default_send_IPI_dest_field(apicid, vector,
 82			APIC_DEST_PHYSICAL);
 83		local_irq_restore(flags);
 84		preempt_enable();
 85		return;
 86	}
 87	preempt_enable();
 88
 89	dmode = (vector == NMI_VECTOR) ? APIC_DM_NMI : APIC_DM_FIXED;
 90	numachip_apic_icr_write(apicid, dmode | vector);
 91}
 92
 93static void numachip_send_IPI_mask(const struct cpumask *mask, int vector)
 94{
 95	unsigned int cpu;
 96
 97	for_each_cpu(cpu, mask)
 98		numachip_send_IPI_one(cpu, vector);
 99}
100
101static void numachip_send_IPI_mask_allbutself(const struct cpumask *mask,
102						int vector)
103{
104	unsigned int this_cpu = smp_processor_id();
105	unsigned int cpu;
106
107	for_each_cpu(cpu, mask) {
108		if (cpu != this_cpu)
109			numachip_send_IPI_one(cpu, vector);
110	}
111}
112
113static void numachip_send_IPI_allbutself(int vector)
114{
115	unsigned int this_cpu = smp_processor_id();
116	unsigned int cpu;
117
118	for_each_online_cpu(cpu) {
119		if (cpu != this_cpu)
120			numachip_send_IPI_one(cpu, vector);
121	}
122}
123
124static void numachip_send_IPI_all(int vector)
125{
126	numachip_send_IPI_mask(cpu_online_mask, vector);
127}
128
129static void numachip_send_IPI_self(int vector)
130{
131	apic_write(APIC_SELF_IPI, vector);
132}
133
134static int __init numachip1_probe(void)
135{
136	return apic == &apic_numachip1;
137}
138
139static int __init numachip2_probe(void)
140{
141	return apic == &apic_numachip2;
142}
143
144static void fixup_cpu_id(struct cpuinfo_x86 *c, int node)
145{
146	u64 val;
147	u32 nodes = 1;
148
149	c->topo.llc_id = node;
150
151	/* Account for nodes per socket in multi-core-module processors */
152	if (boot_cpu_has(X86_FEATURE_NODEID_MSR)) {
153		rdmsrl(MSR_FAM10H_NODE_ID, val);
154		nodes = ((val >> 3) & 7) + 1;
155	}
156
157	c->topo.pkg_id = node / nodes;
158}
159
160static int __init numachip_system_init(void)
161{
162	/* Map the LCSR area and set up the apic_icr_write function */
163	switch (numachip_system) {
164	case 1:
165		init_extra_mapping_uc(NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_SIZE);
166		numachip_apic_icr_write = numachip1_apic_icr_write;
167		break;
168	case 2:
169		init_extra_mapping_uc(NUMACHIP2_LCSR_BASE, NUMACHIP2_LCSR_SIZE);
170		numachip_apic_icr_write = numachip2_apic_icr_write;
171		break;
172	default:
173		return 0;
174	}
175
176	x86_cpuinit.fixup_cpu_id = fixup_cpu_id;
177	x86_init.pci.arch_init = pci_numachip_init;
178
179	return 0;
180}
181early_initcall(numachip_system_init);
182
183static int numachip1_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
184{
185	if ((strncmp(oem_id, "NUMASC", 6) != 0) ||
186	    (strncmp(oem_table_id, "NCONNECT", 8) != 0))
187		return 0;
188
189	numachip_system = 1;
190
191	return 1;
192}
193
194static int numachip2_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
195{
196	if ((strncmp(oem_id, "NUMASC", 6) != 0) ||
197	    (strncmp(oem_table_id, "NCONECT2", 8) != 0))
198		return 0;
199
200	numachip_system = 2;
201
202	return 1;
203}
204
205static const struct apic apic_numachip1 __refconst = {
206	.name				= "NumaConnect system",
207	.probe				= numachip1_probe,
208	.acpi_madt_oem_check		= numachip1_acpi_madt_oem_check,
209
210	.dest_mode_logical		= false,
211
212	.disable_esr			= 0,
213
214	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
215
216	.max_apic_id			= UINT_MAX,
217	.get_apic_id			= numachip1_get_apic_id,
218
219	.calc_dest_apicid		= apic_default_calc_apicid,
220
221	.send_IPI			= numachip_send_IPI_one,
222	.send_IPI_mask			= numachip_send_IPI_mask,
223	.send_IPI_mask_allbutself	= numachip_send_IPI_mask_allbutself,
224	.send_IPI_allbutself		= numachip_send_IPI_allbutself,
225	.send_IPI_all			= numachip_send_IPI_all,
226	.send_IPI_self			= numachip_send_IPI_self,
227
228	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
229
230	.read				= native_apic_mem_read,
231	.write				= native_apic_mem_write,
232	.eoi				= native_apic_mem_eoi,
233	.icr_read			= native_apic_icr_read,
234	.icr_write			= native_apic_icr_write,
235};
236
237apic_driver(apic_numachip1);
238
239static const struct apic apic_numachip2 __refconst = {
240	.name				= "NumaConnect2 system",
241	.probe				= numachip2_probe,
242	.acpi_madt_oem_check		= numachip2_acpi_madt_oem_check,
243
244	.dest_mode_logical		= false,
245
246	.disable_esr			= 0,
247
248	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
249
250	.max_apic_id			= UINT_MAX,
251	.get_apic_id			= numachip2_get_apic_id,
252
253	.calc_dest_apicid		= apic_default_calc_apicid,
254
255	.send_IPI			= numachip_send_IPI_one,
256	.send_IPI_mask			= numachip_send_IPI_mask,
257	.send_IPI_mask_allbutself	= numachip_send_IPI_mask_allbutself,
258	.send_IPI_allbutself		= numachip_send_IPI_allbutself,
259	.send_IPI_all			= numachip_send_IPI_all,
260	.send_IPI_self			= numachip_send_IPI_self,
261
262	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
263
264	.read				= native_apic_mem_read,
265	.write				= native_apic_mem_write,
266	.eoi				= native_apic_mem_eoi,
267	.icr_read			= native_apic_icr_read,
268	.icr_write			= native_apic_icr_write,
269};
270
271apic_driver(apic_numachip2);