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1/*
2 * This file is subject to the terms and conditions of the GNU General
3 * Public License. See the file "COPYING" in the main directory of this
4 * archive for more details.
5 *
6 * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
7 * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
8 */
9#include <linux/init.h>
10#include <linux/sched.h>
11#include <linux/sched/task_stack.h>
12#include <linux/topology.h>
13#include <linux/nodemask.h>
14
15#include <asm/page.h>
16#include <asm/processor.h>
17#include <asm/ptrace.h>
18#include <asm/sn/agent.h>
19#include <asm/sn/arch.h>
20#include <asm/sn/gda.h>
21#include <asm/sn/intr.h>
22#include <asm/sn/klconfig.h>
23#include <asm/sn/launch.h>
24#include <asm/sn/mapped_kernel.h>
25#include <asm/sn/types.h>
26
27#include "ip27-common.h"
28
29static int node_scan_cpus(nasid_t nasid, int highest)
30{
31 static int cpus_found;
32 lboard_t *brd;
33 klcpu_t *acpu;
34 cpuid_t cpuid;
35
36 brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
37
38 do {
39 acpu = (klcpu_t *)find_first_component(brd, KLSTRUCT_CPU);
40 while (acpu) {
41 cpuid = acpu->cpu_info.virtid;
42 /* Only let it join in if it's marked enabled */
43 if ((acpu->cpu_info.flags & KLINFO_ENABLE) &&
44 (cpus_found != NR_CPUS)) {
45 if (cpuid > highest)
46 highest = cpuid;
47 set_cpu_possible(cpuid, true);
48 cputonasid(cpus_found) = nasid;
49 cputoslice(cpus_found) = acpu->cpu_info.physid;
50 sn_cpu_info[cpus_found].p_speed =
51 acpu->cpu_speed;
52 cpus_found++;
53 }
54 acpu = (klcpu_t *)find_component(brd, (klinfo_t *)acpu,
55 KLSTRUCT_CPU);
56 }
57 brd = KLCF_NEXT(brd);
58 if (!brd)
59 break;
60
61 brd = find_lboard(brd, KLTYPE_IP27);
62 } while (brd);
63
64 return highest;
65}
66
67void cpu_node_probe(void)
68{
69 int i, highest = 0;
70 gda_t *gdap = GDA;
71
72 nodes_clear(node_online_map);
73 for (i = 0; i < MAX_NUMNODES; i++) {
74 nasid_t nasid = gdap->g_nasidtable[i];
75 if (nasid == INVALID_NASID)
76 break;
77 node_set_online(nasid);
78 highest = node_scan_cpus(nasid, highest);
79 }
80
81 printk("Discovered %d cpus on %d nodes\n", highest + 1, num_online_nodes());
82}
83
84static __init void intr_clear_all(nasid_t nasid)
85{
86 int i;
87
88 REMOTE_HUB_S(nasid, PI_INT_MASK0_A, 0);
89 REMOTE_HUB_S(nasid, PI_INT_MASK0_B, 0);
90 REMOTE_HUB_S(nasid, PI_INT_MASK1_A, 0);
91 REMOTE_HUB_S(nasid, PI_INT_MASK1_B, 0);
92
93 for (i = 0; i < 128; i++)
94 REMOTE_HUB_CLR_INTR(nasid, i);
95}
96
97static void ip27_send_ipi_single(int destid, unsigned int action)
98{
99 int irq;
100
101 switch (action) {
102 case SMP_RESCHEDULE_YOURSELF:
103 irq = CPU_RESCHED_A_IRQ;
104 break;
105 case SMP_CALL_FUNCTION:
106 irq = CPU_CALL_A_IRQ;
107 break;
108 default:
109 panic("sendintr");
110 }
111
112 irq += cputoslice(destid);
113
114 /*
115 * Set the interrupt bit associated with the CPU we want to
116 * send the interrupt to.
117 */
118 REMOTE_HUB_SEND_INTR(cpu_to_node(destid), irq);
119}
120
121static void ip27_send_ipi_mask(const struct cpumask *mask, unsigned int action)
122{
123 unsigned int i;
124
125 for_each_cpu(i, mask)
126 ip27_send_ipi_single(i, action);
127}
128
129static void ip27_init_cpu(void)
130{
131 per_cpu_init();
132}
133
134static void ip27_smp_finish(void)
135{
136 hub_rt_clock_event_init();
137 local_irq_enable();
138}
139
140/*
141 * Launch a slave into smp_bootstrap(). It doesn't take an argument, and we
142 * set sp to the kernel stack of the newly created idle process, gp to the proc
143 * struct so that current_thread_info() will work.
144 */
145static int ip27_boot_secondary(int cpu, struct task_struct *idle)
146{
147 unsigned long gp = (unsigned long)task_thread_info(idle);
148 unsigned long sp = __KSTK_TOS(idle);
149
150 LAUNCH_SLAVE(cputonasid(cpu), cputoslice(cpu),
151 (launch_proc_t)MAPPED_KERN_RW_TO_K0(smp_bootstrap),
152 0, (void *) sp, (void *) gp);
153 return 0;
154}
155
156static void __init ip27_smp_setup(void)
157{
158 nasid_t nasid;
159
160 for_each_online_node(nasid) {
161 if (nasid == 0)
162 continue;
163 intr_clear_all(nasid);
164 }
165
166 replicate_kernel_text();
167
168 /*
169 * PROM sets up system, that boot cpu is always first CPU on nasid 0
170 */
171 cputonasid(0) = 0;
172 cputoslice(0) = LOCAL_HUB_L(PI_CPU_NUM);
173}
174
175static void __init ip27_prepare_cpus(unsigned int max_cpus)
176{
177 /* We already did everything necessary earlier */
178}
179
180const struct plat_smp_ops ip27_smp_ops = {
181 .send_ipi_single = ip27_send_ipi_single,
182 .send_ipi_mask = ip27_send_ipi_mask,
183 .init_secondary = ip27_init_cpu,
184 .smp_finish = ip27_smp_finish,
185 .boot_secondary = ip27_boot_secondary,
186 .smp_setup = ip27_smp_setup,
187 .prepare_cpus = ip27_prepare_cpus,
188 .prepare_boot_cpu = ip27_init_cpu,
189};
1/*
2 * This file is subject to the terms and conditions of the GNU General
3 * Public License. See the file "COPYING" in the main directory of this
4 * archive for more details.
5 *
6 * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
7 * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
8 */
9#include <linux/init.h>
10#include <linux/sched.h>
11#include <linux/sched/task_stack.h>
12#include <linux/topology.h>
13#include <linux/nodemask.h>
14
15#include <asm/page.h>
16#include <asm/processor.h>
17#include <asm/ptrace.h>
18#include <asm/sn/agent.h>
19#include <asm/sn/arch.h>
20#include <asm/sn/gda.h>
21#include <asm/sn/intr.h>
22#include <asm/sn/klconfig.h>
23#include <asm/sn/launch.h>
24#include <asm/sn/mapped_kernel.h>
25#include <asm/sn/types.h>
26
27#include "ip27-common.h"
28
29static int node_scan_cpus(nasid_t nasid, int highest)
30{
31 static int cpus_found;
32 lboard_t *brd;
33 klcpu_t *acpu;
34 cpuid_t cpuid;
35
36 brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
37
38 do {
39 acpu = (klcpu_t *)find_first_component(brd, KLSTRUCT_CPU);
40 while (acpu) {
41 cpuid = acpu->cpu_info.virtid;
42 /* Only let it join in if it's marked enabled */
43 if ((acpu->cpu_info.flags & KLINFO_ENABLE) &&
44 (cpus_found != NR_CPUS)) {
45 if (cpuid > highest)
46 highest = cpuid;
47 set_cpu_possible(cpuid, true);
48 cputonasid(cpus_found) = nasid;
49 cputoslice(cpus_found) = acpu->cpu_info.physid;
50 sn_cpu_info[cpus_found].p_speed =
51 acpu->cpu_speed;
52 cpus_found++;
53 }
54 acpu = (klcpu_t *)find_component(brd, (klinfo_t *)acpu,
55 KLSTRUCT_CPU);
56 }
57 brd = KLCF_NEXT(brd);
58 if (!brd)
59 break;
60
61 brd = find_lboard(brd, KLTYPE_IP27);
62 } while (brd);
63
64 return highest;
65}
66
67void cpu_node_probe(void)
68{
69 int i, highest = 0;
70 gda_t *gdap = GDA;
71
72 nodes_clear(node_online_map);
73 for (i = 0; i < MAX_NUMNODES; i++) {
74 nasid_t nasid = gdap->g_nasidtable[i];
75 if (nasid == INVALID_NASID)
76 break;
77 node_set_online(nasid);
78 highest = node_scan_cpus(nasid, highest);
79 }
80
81 printk("Discovered %d cpus on %d nodes\n", highest + 1, num_online_nodes());
82}
83
84static __init void intr_clear_all(nasid_t nasid)
85{
86 int i;
87
88 REMOTE_HUB_S(nasid, PI_INT_MASK0_A, 0);
89 REMOTE_HUB_S(nasid, PI_INT_MASK0_B, 0);
90 REMOTE_HUB_S(nasid, PI_INT_MASK1_A, 0);
91 REMOTE_HUB_S(nasid, PI_INT_MASK1_B, 0);
92
93 for (i = 0; i < 128; i++)
94 REMOTE_HUB_CLR_INTR(nasid, i);
95}
96
97static void ip27_send_ipi_single(int destid, unsigned int action)
98{
99 int irq;
100
101 switch (action) {
102 case SMP_RESCHEDULE_YOURSELF:
103 irq = CPU_RESCHED_A_IRQ;
104 break;
105 case SMP_CALL_FUNCTION:
106 irq = CPU_CALL_A_IRQ;
107 break;
108 default:
109 panic("sendintr");
110 }
111
112 irq += cputoslice(destid);
113
114 /*
115 * Set the interrupt bit associated with the CPU we want to
116 * send the interrupt to.
117 */
118 REMOTE_HUB_SEND_INTR(cpu_to_node(destid), irq);
119}
120
121static void ip27_send_ipi_mask(const struct cpumask *mask, unsigned int action)
122{
123 unsigned int i;
124
125 for_each_cpu(i, mask)
126 ip27_send_ipi_single(i, action);
127}
128
129static void ip27_init_cpu(void)
130{
131 per_cpu_init();
132}
133
134static void ip27_smp_finish(void)
135{
136 hub_rt_clock_event_init();
137 local_irq_enable();
138}
139
140/*
141 * Launch a slave into smp_bootstrap(). It doesn't take an argument, and we
142 * set sp to the kernel stack of the newly created idle process, gp to the proc
143 * struct so that current_thread_info() will work.
144 */
145static int ip27_boot_secondary(int cpu, struct task_struct *idle)
146{
147 unsigned long gp = (unsigned long)task_thread_info(idle);
148 unsigned long sp = __KSTK_TOS(idle);
149
150 LAUNCH_SLAVE(cputonasid(cpu), cputoslice(cpu),
151 (launch_proc_t)MAPPED_KERN_RW_TO_K0(smp_bootstrap),
152 0, (void *) sp, (void *) gp);
153 return 0;
154}
155
156static void __init ip27_smp_setup(void)
157{
158 nasid_t nasid;
159
160 for_each_online_node(nasid) {
161 if (nasid == 0)
162 continue;
163 intr_clear_all(nasid);
164 }
165
166 replicate_kernel_text();
167
168 /*
169 * PROM sets up system, that boot cpu is always first CPU on nasid 0
170 */
171 cputonasid(0) = 0;
172 cputoslice(0) = LOCAL_HUB_L(PI_CPU_NUM);
173}
174
175static void __init ip27_prepare_cpus(unsigned int max_cpus)
176{
177 /* We already did everything necessary earlier */
178}
179
180const struct plat_smp_ops ip27_smp_ops = {
181 .send_ipi_single = ip27_send_ipi_single,
182 .send_ipi_mask = ip27_send_ipi_mask,
183 .init_secondary = ip27_init_cpu,
184 .smp_finish = ip27_smp_finish,
185 .boot_secondary = ip27_boot_secondary,
186 .smp_setup = ip27_smp_setup,
187 .prepare_cpus = ip27_prepare_cpus,
188 .prepare_boot_cpu = ip27_init_cpu,
189};