4 * Copyright (C) 2006 Sony Computer Entertainment Inc.
5 * Copyright 2006 Sony Corp.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/kernel.h>
22 #include <linux/smp.h>
24 #include <asm/machdep.h>
30 #define DBG udbg_printf
36 * ps3_ipi_virqs - a per cpu array of virqs for ipi use
40 static DEFINE_PER_CPU(unsigned int, ps3_ipi_virqs[MSG_COUNT]);
42 static void do_message_pass(int target, int msg)
47 if (msg >= MSG_COUNT) {
48 DBG("%s:%d: bad msg: %d\n", __func__, __LINE__, msg);
52 virq = per_cpu(ps3_ipi_virqs, target)[msg];
53 result = ps3_send_event_locally(virq);
56 DBG("%s:%d: ps3_send_event_locally(%d, %d) failed"
57 " (%d)\n", __func__, __LINE__, target, msg, result);
60 static void ps3_smp_message_pass(int target, int msg)
65 do_message_pass(target, msg);
66 else if (target == MSG_ALL_BUT_SELF) {
67 for_each_online_cpu(cpu)
68 if (cpu != smp_processor_id())
69 do_message_pass(cpu, msg);
71 for_each_online_cpu(cpu)
72 do_message_pass(cpu, msg);
76 static int ps3_smp_probe(void)
81 static void __init ps3_smp_setup_cpu(int cpu)
84 unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
87 DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
90 * Check assumptions on ps3_ipi_virqs[] indexing. If this
91 * check fails, then a different mapping of PPC_MSG_
92 * to index needs to be setup.
95 BUILD_BUG_ON(PPC_MSG_CALL_FUNCTION != 0);
96 BUILD_BUG_ON(PPC_MSG_RESCHEDULE != 1);
97 BUILD_BUG_ON(PPC_MSG_CALL_FUNC_SINGLE != 2);
98 BUILD_BUG_ON(PPC_MSG_DEBUGGER_BREAK != 3);
100 for (i = 0; i < MSG_COUNT; i++) {
101 result = ps3_event_receive_port_setup(cpu, &virqs[i]);
106 DBG("%s:%d: (%d, %d) => virq %u\n",
107 __func__, __LINE__, cpu, i, virqs[i]);
109 result = smp_request_message_ipi(virqs[i], i);
115 ps3_register_ipi_debug_brk(cpu, virqs[PPC_MSG_DEBUGGER_BREAK]);
117 DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
120 void ps3_smp_cleanup_cpu(int cpu)
122 unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
125 DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
127 for (i = 0; i < MSG_COUNT; i++) {
128 /* Can't call free_irq from interrupt context. */
129 ps3_event_receive_port_destroy(virqs[i]);
133 DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
136 static struct smp_ops_t ps3_smp_ops = {
137 .probe = ps3_smp_probe,
138 .message_pass = ps3_smp_message_pass,
139 .kick_cpu = smp_generic_kick_cpu,
140 .setup_cpu = ps3_smp_setup_cpu,
143 void smp_init_ps3(void)
145 DBG(" -> %s\n", __func__);
146 smp_ops = &ps3_smp_ops;
147 DBG(" <- %s\n", __func__);