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 numachip1_set_apic_id(u32 id)
 42{
 43	return (id & 0xff) << 24;
 44}
 45
 46static u32 numachip2_get_apic_id(u32 x)
 47{
 48	u64 mcfg;
 49
 50	rdmsrl(MSR_FAM10H_MMIO_CONF_BASE, mcfg);
 51	return ((mcfg >> (28 - 8)) & 0xfff00) | (x >> 24);
 52}
 53
 54static u32 numachip2_set_apic_id(u32 id)
 55{
 56	return id << 24;
 57}
 58
 59static u32 numachip_phys_pkg_id(u32 initial_apic_id, int index_msb)
 60{
 61	return initial_apic_id >> index_msb;
 62}
 63
 64static void numachip1_apic_icr_write(int apicid, unsigned int val)
 65{
 66	write_lcsr(CSR_G3_EXT_IRQ_GEN, (apicid << 16) | val);
 67}
 68
 69static void numachip2_apic_icr_write(int apicid, unsigned int val)
 70{
 71	numachip2_write32_lcsr(NUMACHIP2_APIC_ICR, (apicid << 12) | val);
 72}
 73
 74static int numachip_wakeup_secondary(u32 phys_apicid, unsigned long start_rip)
 75{
 76	numachip_apic_icr_write(phys_apicid, APIC_DM_INIT);
 77	numachip_apic_icr_write(phys_apicid, APIC_DM_STARTUP |
 78		(start_rip >> 12));
 79
 80	return 0;
 81}
 82
 83static void numachip_send_IPI_one(int cpu, int vector)
 84{
 85	int local_apicid, apicid = per_cpu(x86_cpu_to_apicid, cpu);
 86	unsigned int dmode;
 87
 88	preempt_disable();
 89	local_apicid = __this_cpu_read(x86_cpu_to_apicid);
 90
 91	/* Send via local APIC where non-local part matches */
 92	if (!((apicid ^ local_apicid) >> NUMACHIP_LAPIC_BITS)) {
 93		unsigned long flags;
 94
 95		local_irq_save(flags);
 96		__default_send_IPI_dest_field(apicid, vector,
 97			APIC_DEST_PHYSICAL);
 98		local_irq_restore(flags);
 99		preempt_enable();
100		return;
101	}
102	preempt_enable();
103
104	dmode = (vector == NMI_VECTOR) ? APIC_DM_NMI : APIC_DM_FIXED;
105	numachip_apic_icr_write(apicid, dmode | vector);
106}
107
108static void numachip_send_IPI_mask(const struct cpumask *mask, int vector)
109{
110	unsigned int cpu;
111
112	for_each_cpu(cpu, mask)
113		numachip_send_IPI_one(cpu, vector);
114}
115
116static void numachip_send_IPI_mask_allbutself(const struct cpumask *mask,
117						int vector)
118{
119	unsigned int this_cpu = smp_processor_id();
120	unsigned int cpu;
121
122	for_each_cpu(cpu, mask) {
123		if (cpu != this_cpu)
124			numachip_send_IPI_one(cpu, vector);
125	}
126}
127
128static void numachip_send_IPI_allbutself(int vector)
129{
130	unsigned int this_cpu = smp_processor_id();
131	unsigned int cpu;
132
133	for_each_online_cpu(cpu) {
134		if (cpu != this_cpu)
135			numachip_send_IPI_one(cpu, vector);
136	}
137}
138
139static void numachip_send_IPI_all(int vector)
140{
141	numachip_send_IPI_mask(cpu_online_mask, vector);
142}
143
144static void numachip_send_IPI_self(int vector)
145{
146	apic_write(APIC_SELF_IPI, vector);
147}
148
149static int __init numachip1_probe(void)
150{
151	return apic == &apic_numachip1;
152}
153
154static int __init numachip2_probe(void)
155{
156	return apic == &apic_numachip2;
157}
158
159static void fixup_cpu_id(struct cpuinfo_x86 *c, int node)
160{
161	u64 val;
162	u32 nodes = 1;
163
164	c->topo.llc_id = node;
165
166	/* Account for nodes per socket in multi-core-module processors */
167	if (boot_cpu_has(X86_FEATURE_NODEID_MSR)) {
168		rdmsrl(MSR_FAM10H_NODE_ID, val);
169		nodes = ((val >> 3) & 7) + 1;
170	}
171
172	c->topo.pkg_id = node / nodes;
173}
174
175static int __init numachip_system_init(void)
176{
177	/* Map the LCSR area and set up the apic_icr_write function */
178	switch (numachip_system) {
179	case 1:
180		init_extra_mapping_uc(NUMACHIP_LCSR_BASE, NUMACHIP_LCSR_SIZE);
181		numachip_apic_icr_write = numachip1_apic_icr_write;
182		break;
183	case 2:
184		init_extra_mapping_uc(NUMACHIP2_LCSR_BASE, NUMACHIP2_LCSR_SIZE);
185		numachip_apic_icr_write = numachip2_apic_icr_write;
186		break;
187	default:
188		return 0;
189	}
190
191	x86_cpuinit.fixup_cpu_id = fixup_cpu_id;
192	x86_init.pci.arch_init = pci_numachip_init;
193
194	return 0;
195}
196early_initcall(numachip_system_init);
197
198static int numachip1_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
199{
200	if ((strncmp(oem_id, "NUMASC", 6) != 0) ||
201	    (strncmp(oem_table_id, "NCONNECT", 8) != 0))
202		return 0;
203
204	numachip_system = 1;
205
206	return 1;
207}
208
209static int numachip2_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
210{
211	if ((strncmp(oem_id, "NUMASC", 6) != 0) ||
212	    (strncmp(oem_table_id, "NCONECT2", 8) != 0))
213		return 0;
214
215	numachip_system = 2;
216
217	return 1;
218}
219
220static const struct apic apic_numachip1 __refconst = {
221	.name				= "NumaConnect system",
222	.probe				= numachip1_probe,
223	.acpi_madt_oem_check		= numachip1_acpi_madt_oem_check,
224
225	.dest_mode_logical		= false,
226
227	.disable_esr			= 0,
228
229	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
230	.phys_pkg_id			= numachip_phys_pkg_id,
231
232	.max_apic_id			= UINT_MAX,
233	.get_apic_id			= numachip1_get_apic_id,
234	.set_apic_id			= numachip1_set_apic_id,
235
236	.calc_dest_apicid		= apic_default_calc_apicid,
237
238	.send_IPI			= numachip_send_IPI_one,
239	.send_IPI_mask			= numachip_send_IPI_mask,
240	.send_IPI_mask_allbutself	= numachip_send_IPI_mask_allbutself,
241	.send_IPI_allbutself		= numachip_send_IPI_allbutself,
242	.send_IPI_all			= numachip_send_IPI_all,
243	.send_IPI_self			= numachip_send_IPI_self,
244
245	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
246
247	.read				= native_apic_mem_read,
248	.write				= native_apic_mem_write,
249	.eoi				= native_apic_mem_eoi,
250	.icr_read			= native_apic_icr_read,
251	.icr_write			= native_apic_icr_write,
252};
253
254apic_driver(apic_numachip1);
255
256static const struct apic apic_numachip2 __refconst = {
257	.name				= "NumaConnect2 system",
258	.probe				= numachip2_probe,
259	.acpi_madt_oem_check		= numachip2_acpi_madt_oem_check,
260
261	.dest_mode_logical		= false,
262
263	.disable_esr			= 0,
264
265	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
266	.phys_pkg_id			= numachip_phys_pkg_id,
267
268	.max_apic_id			= UINT_MAX,
269	.get_apic_id			= numachip2_get_apic_id,
270	.set_apic_id			= numachip2_set_apic_id,
271
272	.calc_dest_apicid		= apic_default_calc_apicid,
273
274	.send_IPI			= numachip_send_IPI_one,
275	.send_IPI_mask			= numachip_send_IPI_mask,
276	.send_IPI_mask_allbutself	= numachip_send_IPI_mask_allbutself,
277	.send_IPI_allbutself		= numachip_send_IPI_allbutself,
278	.send_IPI_all			= numachip_send_IPI_all,
279	.send_IPI_self			= numachip_send_IPI_self,
280
281	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
282
283	.read				= native_apic_mem_read,
284	.write				= native_apic_mem_write,
285	.eoi				= native_apic_mem_eoi,
286	.icr_read			= native_apic_icr_read,
287	.icr_write			= native_apic_icr_write,
288};
289
290apic_driver(apic_numachip2);