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 | |
204fba4a | 40 | static DEFINE_PER_CPU(unsigned int [MSG_COUNT], ps3_ipi_virqs); |
f58a9d17 | 41 | |
f1072939 | 42 | static void ps3_smp_message_pass(int cpu, int msg) |
f58a9d17 GL |
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 | ||
f1072939 | 52 | virq = per_cpu(ps3_ipi_virqs, cpu)[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" | |
f1072939 | 57 | " (%d)\n", __func__, __LINE__, cpu, msg, result); |
f58a9d17 GL |
58 | } |
59 | ||
a7f4ee1f | 60 | static void __init ps3_smp_probe(void) |
f58a9d17 | 61 | { |
7eaf09ee | 62 | int cpu; |
f58a9d17 | 63 | |
7eaf09ee GL |
64 | for (cpu = 0; cpu < 2; cpu++) { |
65 | int result; | |
66 | unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu); | |
67 | int i; | |
f58a9d17 | 68 | |
7eaf09ee | 69 | DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu); |
f58a9d17 | 70 | |
7eaf09ee GL |
71 | /* |
72 | * Check assumptions on ps3_ipi_virqs[] indexing. If this | |
73 | * check fails, then a different mapping of PPC_MSG_ | |
74 | * to index needs to be setup. | |
75 | */ | |
f58a9d17 | 76 | |
7eaf09ee GL |
77 | BUILD_BUG_ON(PPC_MSG_CALL_FUNCTION != 0); |
78 | BUILD_BUG_ON(PPC_MSG_RESCHEDULE != 1); | |
1b67bee1 | 79 | BUILD_BUG_ON(PPC_MSG_TICK_BROADCAST != 2); |
7eaf09ee | 80 | BUILD_BUG_ON(PPC_MSG_DEBUGGER_BREAK != 3); |
f58a9d17 | 81 | |
7eaf09ee GL |
82 | for (i = 0; i < MSG_COUNT; i++) { |
83 | result = ps3_event_receive_port_setup(cpu, &virqs[i]); | |
f58a9d17 | 84 | |
7eaf09ee GL |
85 | if (result) |
86 | continue; | |
f58a9d17 | 87 | |
7eaf09ee GL |
88 | DBG("%s:%d: (%d, %d) => virq %u\n", |
89 | __func__, __LINE__, cpu, i, virqs[i]); | |
f58a9d17 | 90 | |
7eaf09ee | 91 | result = smp_request_message_ipi(virqs[i], i); |
f58a9d17 | 92 | |
7eaf09ee GL |
93 | if (result) |
94 | virqs[i] = NO_IRQ; | |
95 | else | |
96 | ps3_register_ipi_irq(cpu, virqs[i]); | |
97 | } | |
f58a9d17 | 98 | |
7eaf09ee | 99 | ps3_register_ipi_debug_brk(cpu, virqs[PPC_MSG_DEBUGGER_BREAK]); |
f58a9d17 | 100 | |
7eaf09ee GL |
101 | DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu); |
102 | } | |
f58a9d17 GL |
103 | } |
104 | ||
105 | void ps3_smp_cleanup_cpu(int cpu) | |
106 | { | |
7961f20c | 107 | unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu); |
f58a9d17 GL |
108 | int i; |
109 | ||
110 | DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu); | |
dc4f60c2 | 111 | |
f58a9d17 | 112 | for (i = 0; i < MSG_COUNT; i++) { |
9263e85a | 113 | /* Can't call free_irq from interrupt context. */ |
dc4f60c2 | 114 | ps3_event_receive_port_destroy(virqs[i]); |
f58a9d17 GL |
115 | virqs[i] = NO_IRQ; |
116 | } | |
dc4f60c2 | 117 | |
f58a9d17 GL |
118 | DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu); |
119 | } | |
120 | ||
121 | static struct smp_ops_t ps3_smp_ops = { | |
122 | .probe = ps3_smp_probe, | |
123 | .message_pass = ps3_smp_message_pass, | |
124 | .kick_cpu = smp_generic_kick_cpu, | |
f58a9d17 GL |
125 | }; |
126 | ||
127 | void smp_init_ps3(void) | |
128 | { | |
129 | DBG(" -> %s\n", __func__); | |
130 | smp_ops = &ps3_smp_ops; | |
131 | DBG(" <- %s\n", __func__); | |
132 | } |