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/*
* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
*/
/*
* Simulator Platform-specific hooks for SMP operation
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/cpumask.h>
#include <linux/interrupt.h>
#include <asm/atomic.h>
#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/system.h>
#include <asm/hardirq.h>
#include <asm/mmu_context.h>
#include <asm/smp.h>
#ifdef CONFIG_MIPS_MT_SMTC
#include <asm/smtc_ipi.h>
#endif /* CONFIG_MIPS_MT_SMTC */
/* VPE/SMP Prototype implements platform interfaces directly */
#if !defined(CONFIG_MIPS_MT_SMP)
/*
* Cause the specified action to be performed on a targeted "CPU"
*/
void core_send_ipi(int cpu, unsigned int action)
{
#ifdef CONFIG_MIPS_MT_SMTC
smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
#endif /* CONFIG_MIPS_MT_SMTC */
/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
}
/*
* Detect available CPUs/VPEs/TCs and populate phys_cpu_present_map
*/
void __init prom_build_cpu_map(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
int nextslot;
/*
* As of November, 2004, MIPSsim only simulates one core
* at a time. However, that core may be a MIPS MT core
* with multiple virtual processors and thread contexts.
*/
if (read_c0_config3() & (1<<2)) {
nextslot = mipsmt_build_cpu_map(1);
}
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
* Platform "CPU" startup hook
*/
void prom_boot_secondary(int cpu, struct task_struct *idle)
{
#ifdef CONFIG_MIPS_MT_SMTC
smtc_boot_secondary(cpu, idle);
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
* Post-config but pre-boot cleanup entry point
*/
void prom_init_secondary(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
void smtc_init_secondary(void);
smtc_init_secondary();
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
* Platform SMP pre-initialization
*/
void prom_prepare_cpus(unsigned int max_cpus)
{
#ifdef CONFIG_MIPS_MT_SMTC
/*
* As noted above, we can assume a single CPU for now
* but it may be multithreaded.
*/
if (read_c0_config3() & (1<<2)) {
mipsmt_prepare_cpus(max_cpus);
}
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
* SMP initialization finalization entry point
*/
void prom_smp_finish(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
smtc_smp_finish();
#endif /* CONFIG_MIPS_MT_SMTC */
}
/*
* Hook for after all CPUs are online
*/
void prom_cpus_done(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
#endif /* CONFIG_MIPS_MT_SMTC */
}
#endif /* CONFIG_MIPS32R2_MT_SMP */
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