Commit | Line | Data |
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f58a9d17 GL |
1 | /* |
2 | * PS3 SMP routines. | |
3 | * | |
4 | * Copyright (C) 2006 Sony Computer Entertainment Inc. | |
5 | * Copyright 2006 Sony Corp. | |
6 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | */ | |
20 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/smp.h> | |
23 | ||
24 | #include <asm/machdep.h> | |
25 | #include <asm/udbg.h> | |
f58a9d17 GL |
26 | |
27 | #include "platform.h" | |
28 | ||
29 | #if defined(DEBUG) | |
83bb643d | 30 | #define DBG udbg_printf |
f58a9d17 | 31 | #else |
83bb643d | 32 | #define DBG pr_debug |
f58a9d17 GL |
33 | #endif |
34 | ||
f58a9d17 | 35 | /** |
7961f20c | 36 | * ps3_ipi_virqs - a per cpu array of virqs for ipi use |
f58a9d17 GL |
37 | */ |
38 | ||
39 | #define MSG_COUNT 4 | |
7961f20c | 40 | static DEFINE_PER_CPU(unsigned int, ps3_ipi_virqs[MSG_COUNT]); |
f58a9d17 | 41 | |
f58a9d17 GL |
42 | static void do_message_pass(int target, int msg) |
43 | { | |
44 | int result; | |
45 | unsigned int virq; | |
46 | ||
47 | if (msg >= MSG_COUNT) { | |
48 | DBG("%s:%d: bad msg: %d\n", __func__, __LINE__, msg); | |
49 | return; | |
50 | } | |
51 | ||
7961f20c | 52 | virq = per_cpu(ps3_ipi_virqs, target)[msg]; |
f58a9d17 GL |
53 | result = ps3_send_event_locally(virq); |
54 | ||
55 | if (result) | |
56 | DBG("%s:%d: ps3_send_event_locally(%d, %d) failed" | |
57 | " (%d)\n", __func__, __LINE__, target, msg, result); | |
58 | } | |
59 | ||
60 | static void ps3_smp_message_pass(int target, int msg) | |
61 | { | |
62 | int cpu; | |
63 | ||
64 | if (target < NR_CPUS) | |
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); | |
70 | } else { | |
71 | for_each_online_cpu(cpu) | |
72 | do_message_pass(cpu, msg); | |
73 | } | |
74 | } | |
75 | ||
76 | static int ps3_smp_probe(void) | |
77 | { | |
78 | return 2; | |
79 | } | |
80 | ||
81 | static void __init ps3_smp_setup_cpu(int cpu) | |
82 | { | |
83 | int result; | |
7961f20c | 84 | unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu); |
f58a9d17 GL |
85 | int i; |
86 | ||
87 | DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu); | |
88 | ||
89 | /* | |
7961f20c | 90 | * Check assumptions on ps3_ipi_virqs[] indexing. If this |
f58a9d17 GL |
91 | * check fails, then a different mapping of PPC_MSG_ |
92 | * to index needs to be setup. | |
93 | */ | |
94 | ||
b7d7a240 JA |
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); | |
f58a9d17 GL |
99 | |
100 | for (i = 0; i < MSG_COUNT; i++) { | |
dc4f60c2 | 101 | result = ps3_event_receive_port_setup(cpu, &virqs[i]); |
f58a9d17 GL |
102 | |
103 | if (result) | |
104 | continue; | |
105 | ||
106 | DBG("%s:%d: (%d, %d) => virq %u\n", | |
107 | __func__, __LINE__, cpu, i, virqs[i]); | |
108 | ||
fb94fc2b | 109 | result = smp_request_message_ipi(virqs[i], i); |
f58a9d17 | 110 | |
28820d9f GL |
111 | if (result) |
112 | virqs[i] = NO_IRQ; | |
f58a9d17 GL |
113 | } |
114 | ||
115 | ps3_register_ipi_debug_brk(cpu, virqs[PPC_MSG_DEBUGGER_BREAK]); | |
116 | ||
117 | DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu); | |
118 | } | |
119 | ||
120 | void ps3_smp_cleanup_cpu(int cpu) | |
121 | { | |
7961f20c | 122 | unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu); |
f58a9d17 GL |
123 | int i; |
124 | ||
125 | DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu); | |
dc4f60c2 | 126 | |
f58a9d17 | 127 | for (i = 0; i < MSG_COUNT; i++) { |
9263e85a | 128 | /* Can't call free_irq from interrupt context. */ |
dc4f60c2 | 129 | ps3_event_receive_port_destroy(virqs[i]); |
f58a9d17 GL |
130 | virqs[i] = NO_IRQ; |
131 | } | |
dc4f60c2 | 132 | |
f58a9d17 GL |
133 | DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu); |
134 | } | |
135 | ||
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, | |
141 | }; | |
142 | ||
143 | void smp_init_ps3(void) | |
144 | { | |
145 | DBG(" -> %s\n", __func__); | |
146 | smp_ops = &ps3_smp_ops; | |
147 | DBG(" <- %s\n", __func__); | |
148 | } |