/* * PS3 SMP routines. * * Copyright (C) 2006 Sony Computer Entertainment Inc. * Copyright 2006 Sony Corp. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #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 int __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_DEBUGGER_BREAK != 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] = NO_IRQ; else ps3_register_ipi_irq(cpu, virqs[i]); } ps3_register_ipi_debug_brk(cpu, virqs[PPC_MSG_DEBUGGER_BREAK]); DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu); } return 2; } 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] = NO_IRQ; } 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 smp_init_ps3(void) { DBG(" -> %s\n", __func__); smp_ops = &ps3_smp_ops; DBG(" <- %s\n", __func__); }