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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - arch/powerpc/platforms/ps3/smp.c
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>
31 #define DBG(fmt...) udbg_printf(fmt)
33 #define DBG(fmt...) do{if(0)printk(fmt);}while(0)
36 static irqreturn_t
ipi_function_handler(int irq
, void *msg
)
38 smp_message_recv((int)(long)msg
);
43 * virqs - a per cpu array of virqs for ipi use
47 static DEFINE_PER_CPU(unsigned int, virqs
[MSG_COUNT
]);
49 static const char *names
[MSG_COUNT
] = {
56 static void do_message_pass(int target
, int msg
)
61 if (msg
>= MSG_COUNT
) {
62 DBG("%s:%d: bad msg: %d\n", __func__
, __LINE__
, msg
);
66 virq
= per_cpu(virqs
, target
)[msg
];
67 result
= ps3_send_event_locally(virq
);
70 DBG("%s:%d: ps3_send_event_locally(%d, %d) failed"
71 " (%d)\n", __func__
, __LINE__
, target
, msg
, result
);
74 static void ps3_smp_message_pass(int target
, int msg
)
79 do_message_pass(target
, msg
);
80 else if (target
== MSG_ALL_BUT_SELF
) {
81 for_each_online_cpu(cpu
)
82 if (cpu
!= smp_processor_id())
83 do_message_pass(cpu
, msg
);
85 for_each_online_cpu(cpu
)
86 do_message_pass(cpu
, msg
);
90 static int ps3_smp_probe(void)
95 static void __init
ps3_smp_setup_cpu(int cpu
)
98 unsigned int *virqs
= per_cpu(virqs
, cpu
);
101 DBG(" -> %s:%d: (%d)\n", __func__
, __LINE__
, cpu
);
104 * Check assumptions on virqs[] indexing. If this
105 * check fails, then a different mapping of PPC_MSG_
106 * to index needs to be setup.
109 BUILD_BUG_ON(PPC_MSG_CALL_FUNCTION
!= 0);
110 BUILD_BUG_ON(PPC_MSG_RESCHEDULE
!= 1);
111 BUILD_BUG_ON(PPC_MSG_DEBUGGER_BREAK
!= 3);
113 for (i
= 0; i
< MSG_COUNT
; i
++) {
114 result
= ps3_alloc_event_irq(&virqs
[i
]);
119 DBG("%s:%d: (%d, %d) => virq %u\n",
120 __func__
, __LINE__
, cpu
, i
, virqs
[i
]);
123 request_irq(virqs
[i
], ipi_function_handler
, IRQF_DISABLED
,
124 names
[i
], (void*)(long)i
);
127 ps3_register_ipi_debug_brk(cpu
, virqs
[PPC_MSG_DEBUGGER_BREAK
]);
129 DBG(" <- %s:%d: (%d)\n", __func__
, __LINE__
, cpu
);
132 void ps3_smp_cleanup_cpu(int cpu
)
134 unsigned int *virqs
= per_cpu(virqs
, cpu
);
137 DBG(" -> %s:%d: (%d)\n", __func__
, __LINE__
, cpu
);
138 for (i
= 0; i
< MSG_COUNT
; i
++) {
139 ps3_free_event_irq(virqs
[i
]);
140 free_irq(virqs
[i
], (void*)(long)i
);
143 DBG(" <- %s:%d: (%d)\n", __func__
, __LINE__
, cpu
);
146 static struct smp_ops_t ps3_smp_ops
= {
147 .probe
= ps3_smp_probe
,
148 .message_pass
= ps3_smp_message_pass
,
149 .kick_cpu
= smp_generic_kick_cpu
,
150 .setup_cpu
= ps3_smp_setup_cpu
,
153 void smp_init_ps3(void)
155 DBG(" -> %s\n", __func__
);
156 smp_ops
= &ps3_smp_ops
;
157 DBG(" <- %s\n", __func__
);