blob: 09fa7f5216f0f294217e368fcb6e7f0dc91e3d6e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 cpu_data[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, phys_cpu_present_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
Ralf Baechle39408c62005-02-13 23:10:08 +0000130static __init void intr_clear_all(nasid_t nasid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 int i;
133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 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);
Ralf Baechle39408c62005-02-13 23:10:08 +0000138
139 for (i = 0; i < 128; i++)
140 REMOTE_HUB_CLR_INTR(nasid, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141}
142
Ralf Baechle9b6695a2006-02-23 12:23:27 +0000143void __init plat_smp_setup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144{
145 cnodeid_t cnode;
146
Ralf Baechlede1db6f2005-02-13 18:53:26 +0000147 for_each_online_node(cnode) {
148 if (cnode == 0)
149 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 intr_clear_all(COMPACT_TO_NASID_NODEID(cnode));
Ralf Baechlede1db6f2005-02-13 18:53:26 +0000151 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153 replicate_kernel_text();
154
155 /*
156 * Assumption to be fixed: we're always booted on logical / physical
157 * processor 0. While we're always running on logical processor 0
158 * this still means this is physical processor zero; it might for
159 * example be disabled in the firwware.
160 */
161 alloc_cpupda(0, 0);
162}
163
Ralf Baechle9b6695a2006-02-23 12:23:27 +0000164void __init plat_prepare_cpus(unsigned int max_cpus)
165{
166 /* We already did everything necessary earlier */
167}
168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169/*
170 * Launch a slave into smp_bootstrap(). It doesn't take an argument, and we
171 * set sp to the kernel stack of the newly created idle process, gp to the proc
172 * struct so that current_thread_info() will work.
173 */
174void __init prom_boot_secondary(int cpu, struct task_struct *idle)
175{
Al Virodc8f6022006-01-12 01:06:07 -0800176 unsigned long gp = (unsigned long)task_thread_info(idle);
177 unsigned long sp = __KSTK_TOS(idle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
179 LAUNCH_SLAVE(cputonasid(cpu),cputoslice(cpu),
180 (launch_proc_t)MAPPED_KERN_RW_TO_K0(smp_bootstrap),
181 0, (void *) sp, (void *) gp);
182}
183
184void prom_init_secondary(void)
185{
186 per_cpu_init();
187 local_irq_enable();
188}
189
190void __init prom_cpus_done(void)
191{
192}
193
194void prom_smp_finish(void)
195{
196}
197
198void core_send_ipi(int destid, unsigned int action)
199{
200 int irq;
201
202 switch (action) {
203 case SMP_RESCHEDULE_YOURSELF:
204 irq = CPU_RESCHED_A_IRQ;
205 break;
206 case SMP_CALL_FUNCTION:
207 irq = CPU_CALL_A_IRQ;
208 break;
209 default:
210 panic("sendintr");
211 }
212
213 irq += cputoslice(destid);
214
215 /*
216 * Convert the compact hub number to the NASID to get the correct
217 * part of the address space. Then set the interrupt bit associated
218 * with the CPU we want to send the interrupt to.
219 */
220 REMOTE_HUB_SEND_INTR(COMPACT_TO_NASID_NODEID(cpu_to_node(destid)), irq);
221}