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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/nodemask.h>
12#include <asm/page.h>
13#include <asm/processor.h>
14#include <asm/sn/arch.h>
15#include <asm/sn/gda.h>
16#include <asm/sn/intr.h>
17#include <asm/sn/klconfig.h>
18#include <asm/sn/launch.h>
19#include <asm/sn/mapped_kernel.h>
20#include <asm/sn/sn_private.h>
21#include <asm/sn/types.h>
22#include <asm/sn/sn0/hubpi.h>
23#include <asm/sn/sn0/hubio.h>
24#include <asm/sn/sn0/ip27.h>
25
26/*
27 * Takes as first input the PROM assigned cpu id, and the kernel
28 * assigned cpu id as the second.
29 */
30static void alloc_cpupda(cpuid_t cpu, int cpunum)
31{
32 cnodeid_t node = get_cpu_cnode(cpu);
33 nasid_t nasid = COMPACT_TO_NASID_NODEID(node);
34
35 cputonasid(cpunum) = nasid;
36 sn_cpu_info[cpunum].p_nodeid = node;
37 cputoslice(cpunum) = get_cpu_slice(cpu);
38}
39
40static nasid_t get_actual_nasid(lboard_t *brd)
41{
42 klhub_t *hub;
43
44 if (!brd)
45 return INVALID_NASID;
46
47 /* find out if we are a completely disabled brd. */
48 hub = (klhub_t *)find_first_component(brd, KLSTRUCT_HUB);
49 if (!hub)
50 return INVALID_NASID;
51 if (!(hub->hub_info.flags & KLINFO_ENABLE)) /* disabled node brd */
52 return hub->hub_info.physid;
53 else
54 return brd->brd_nasid;
55}
56
57static int do_cpumask(cnodeid_t cnode, nasid_t nasid, int highest)
58{
59 static int tot_cpus_found = 0;
60 lboard_t *brd;
61 klcpu_t *acpu;
62 int cpus_found = 0;
63 cpuid_t cpuid;
64
65 brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_IP27);
66
67 do {
68 acpu = (klcpu_t *)find_first_component(brd, KLSTRUCT_CPU);
69 while (acpu) {
70 cpuid = acpu->cpu_info.virtid;
71 /* cnode is not valid for completely disabled brds */
72 if (get_actual_nasid(brd) == brd->brd_nasid)
73 cpuid_to_compact_node[cpuid] = cnode;
74 if (cpuid > highest)
75 highest = cpuid;
76 /* Only let it join in if it's marked enabled */
77 if ((acpu->cpu_info.flags & KLINFO_ENABLE) &&
78 (tot_cpus_found != NR_CPUS)) {
79 cpu_set(cpuid, cpu_possible_map);
80 alloc_cpupda(cpuid, tot_cpus_found);
81 cpus_found++;
82 tot_cpus_found++;
83 }
84 acpu = (klcpu_t *)find_component(brd, (klinfo_t *)acpu,
85 KLSTRUCT_CPU);
86 }
87 brd = KLCF_NEXT(brd);
88 if (!brd)
89 break;
90
91 brd = find_lboard(brd, KLTYPE_IP27);
92 } while (brd);
93
94 return highest;
95}
96
97void cpu_node_probe(void)
98{
99 int i, highest = 0;
100 gda_t *gdap = GDA;
101
102 /*
103 * Initialize the arrays to invalid nodeid (-1)
104 */
105 for (i = 0; i < MAX_COMPACT_NODES; i++)
106 compact_to_nasid_node[i] = INVALID_NASID;
107 for (i = 0; i < MAX_NASIDS; i++)
108 nasid_to_compact_node[i] = INVALID_CNODEID;
109 for (i = 0; i < MAXCPUS; i++)
110 cpuid_to_compact_node[i] = INVALID_CNODEID;
111
112 /*
113 * MCD - this whole "compact node" stuff can probably be dropped,
114 * as we can handle sparse numbering now
115 */
116 nodes_clear(node_online_map);
117 for (i = 0; i < MAX_COMPACT_NODES; i++) {
118 nasid_t nasid = gdap->g_nasidtable[i];
119 if (nasid == INVALID_NASID)
120 break;
121 compact_to_nasid_node[i] = nasid;
122 nasid_to_compact_node[nasid] = i;
123 node_set_online(num_online_nodes());
124 highest = do_cpumask(i, nasid, highest);
125 }
126
127 printk("Discovered %d cpus on %d nodes\n", highest + 1, num_online_nodes());
128}
129
130static __init void intr_clear_all(nasid_t nasid)
131{
132 int i;
133
134 REMOTE_HUB_S(nasid, PI_INT_MASK0_A, 0);
135 REMOTE_HUB_S(nasid, PI_INT_MASK0_B, 0);
136 REMOTE_HUB_S(nasid, PI_INT_MASK1_A, 0);
137 REMOTE_HUB_S(nasid, PI_INT_MASK1_B, 0);
138
139 for (i = 0; i < 128; i++)
140 REMOTE_HUB_CLR_INTR(nasid, i);
141}
142
143static void ip27_send_ipi_single(int destid, unsigned int action)
144{
145 int irq;
146
147 switch (action) {
148 case SMP_RESCHEDULE_YOURSELF:
149 irq = CPU_RESCHED_A_IRQ;
150 break;
151 case SMP_CALL_FUNCTION:
152 irq = CPU_CALL_A_IRQ;
153 break;
154 default:
155 panic("sendintr");
156 }
157
158 irq += cputoslice(destid);
159
160 /*
161 * Convert the compact hub number to the NASID to get the correct
162 * part of the address space. Then set the interrupt bit associated
163 * with the CPU we want to send the interrupt to.
164 */
165 REMOTE_HUB_SEND_INTR(COMPACT_TO_NASID_NODEID(cpu_to_node(destid)), irq);
166}
167
168static void ip27_send_ipi_mask(const struct cpumask *mask, unsigned int action)
169{
170 unsigned int i;
171
172 for_each_cpu(i, mask)
173 ip27_send_ipi_single(i, action);
174}
175
176static void __cpuinit ip27_init_secondary(void)
177{
178 per_cpu_init();
179}
180
181static void __cpuinit ip27_smp_finish(void)
182{
183 extern void hub_rt_clock_event_init(void);
184
185 hub_rt_clock_event_init();
186 local_irq_enable();
187}
188
189static void __init ip27_cpus_done(void)
190{
191}
192
193/*
194 * Launch a slave into smp_bootstrap(). It doesn't take an argument, and we
195 * set sp to the kernel stack of the newly created idle process, gp to the proc
196 * struct so that current_thread_info() will work.
197 */
198static void __cpuinit ip27_boot_secondary(int cpu, struct task_struct *idle)
199{
200 unsigned long gp = (unsigned long)task_thread_info(idle);
201 unsigned long sp = __KSTK_TOS(idle);
202
203 LAUNCH_SLAVE(cputonasid(cpu), cputoslice(cpu),
204 (launch_proc_t)MAPPED_KERN_RW_TO_K0(smp_bootstrap),
205 0, (void *) sp, (void *) gp);
206}
207
208static void __init ip27_smp_setup(void)
209{
210 cnodeid_t cnode;
211
212 for_each_online_node(cnode) {
213 if (cnode == 0)
214 continue;
215 intr_clear_all(COMPACT_TO_NASID_NODEID(cnode));
216 }
217
218 replicate_kernel_text();
219
220 /*
221 * Assumption to be fixed: we're always booted on logical / physical
222 * processor 0. While we're always running on logical processor 0
223 * this still means this is physical processor zero; it might for
224 * example be disabled in the firmware.
225 */
226 alloc_cpupda(0, 0);
227}
228
229static void __init ip27_prepare_cpus(unsigned int max_cpus)
230{
231 /* We already did everything necessary earlier */
232}
233
234struct plat_smp_ops ip27_smp_ops = {
235 .send_ipi_single = ip27_send_ipi_single,
236 .send_ipi_mask = ip27_send_ipi_mask,
237 .init_secondary = ip27_init_secondary,
238 .smp_finish = ip27_smp_finish,
239 .cpus_done = ip27_cpus_done,
240 .boot_secondary = ip27_boot_secondary,
241 .smp_setup = ip27_smp_setup,
242 .prepare_cpus = ip27_prepare_cpus,
243};