Contributors: 10
Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
Geoff Levand |
419 |
94.80% |
10 |
50.00% |
Jens Axboe |
6 |
1.36% |
1 |
5.00% |
Milton D. Miller II |
4 |
0.90% |
1 |
5.00% |
Michael Ellerman |
3 |
0.68% |
2 |
10.00% |
Nicholas Piggin |
2 |
0.45% |
1 |
5.00% |
Tejun Heo |
2 |
0.45% |
1 |
5.00% |
Geert Uytterhoeven |
2 |
0.45% |
1 |
5.00% |
Thomas Gleixner |
2 |
0.45% |
1 |
5.00% |
Nick Child |
1 |
0.23% |
1 |
5.00% |
Srivatsa S. Bhat |
1 |
0.23% |
1 |
5.00% |
Total |
442 |
|
20 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* PS3 SMP routines.
*
* Copyright (C) 2006 Sony Computer Entertainment Inc.
* Copyright 2006 Sony Corp.
*/
#include <linux/kernel.h>
#include <linux/smp.h>
#include <asm/machdep.h>
#include <asm/udbg.h>
#include "platform.h"
#if defined(DEBUG)
#define DBG udbg_printf
#else
#define DBG pr_debug
#endif
/**
* ps3_ipi_virqs - a per cpu array of virqs for ipi use
*/
#define MSG_COUNT 4
static DEFINE_PER_CPU(unsigned int [MSG_COUNT], ps3_ipi_virqs);
static void ps3_smp_message_pass(int cpu, int msg)
{
int result;
unsigned int virq;
if (msg >= MSG_COUNT) {
DBG("%s:%d: bad msg: %d\n", __func__, __LINE__, msg);
return;
}
virq = per_cpu(ps3_ipi_virqs, cpu)[msg];
result = ps3_send_event_locally(virq);
if (result)
DBG("%s:%d: ps3_send_event_locally(%d, %d) failed"
" (%d)\n", __func__, __LINE__, cpu, msg, result);
}
static void __init ps3_smp_probe(void)
{
int cpu;
for (cpu = 0; cpu < 2; cpu++) {
int result;
unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
int i;
DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
/*
* Check assumptions on ps3_ipi_virqs[] indexing. If this
* check fails, then a different mapping of PPC_MSG_
* to index needs to be setup.
*/
BUILD_BUG_ON(PPC_MSG_CALL_FUNCTION != 0);
BUILD_BUG_ON(PPC_MSG_RESCHEDULE != 1);
BUILD_BUG_ON(PPC_MSG_TICK_BROADCAST != 2);
BUILD_BUG_ON(PPC_MSG_NMI_IPI != 3);
for (i = 0; i < MSG_COUNT; i++) {
result = ps3_event_receive_port_setup(cpu, &virqs[i]);
if (result)
continue;
DBG("%s:%d: (%d, %d) => virq %u\n",
__func__, __LINE__, cpu, i, virqs[i]);
result = smp_request_message_ipi(virqs[i], i);
if (result)
virqs[i] = 0;
else
ps3_register_ipi_irq(cpu, virqs[i]);
}
ps3_register_ipi_debug_brk(cpu, virqs[PPC_MSG_NMI_IPI]);
DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
}
}
void ps3_smp_cleanup_cpu(int cpu)
{
unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
int i;
DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
for (i = 0; i < MSG_COUNT; i++) {
/* Can't call free_irq from interrupt context. */
ps3_event_receive_port_destroy(virqs[i]);
virqs[i] = 0;
}
DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
}
static struct smp_ops_t ps3_smp_ops = {
.probe = ps3_smp_probe,
.message_pass = ps3_smp_message_pass,
.kick_cpu = smp_generic_kick_cpu,
};
void __init smp_init_ps3(void)
{
DBG(" -> %s\n", __func__);
smp_ops = &ps3_smp_ops;
DBG(" <- %s\n", __func__);
}