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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 SMTC operation
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/cpumask.h>
#include <linux/interrupt.h>
#include <linux/smp.h>
#include <linux/atomic.h>
#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/smtc.h>
#include <asm/system.h>
#include <asm/mmu_context.h>
#include <asm/smtc_ipi.h>
/* VPE/SMP Prototype implements platform interfaces directly */
/*
* Cause the specified action to be performed on a targeted "CPU"
*/
static void ssmtc_send_ipi_single(int cpu, unsigned int action)
{
smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
}
static inline void ssmtc_send_ipi_mask(const struct cpumask *mask,
unsigned int action)
{
unsigned int i;
for_each_cpu(i, mask)
ssmtc_send_ipi_single(i, action);
}
/*
* Post-config but pre-boot cleanup entry point
*/
static void __cpuinit ssmtc_init_secondary(void)
{
smtc_init_secondary();
}
/*
* SMP initialization finalization entry point
*/
static void __cpuinit ssmtc_smp_finish(void)
{
smtc_smp_finish();
}
/*
* Hook for after all CPUs are online
*/
static void ssmtc_cpus_done(void)
{
}
/*
* Platform "CPU" startup hook
*/
static void __cpuinit ssmtc_boot_secondary(int cpu, struct task_struct *idle)
{
smtc_boot_secondary(cpu, idle);
}
static void __init ssmtc_smp_setup(void)
{
if (read_c0_config3() & (1 << 2))
mipsmt_build_cpu_map(0);
}
/*
* Platform SMP pre-initialization
*/
static void ssmtc_prepare_cpus(unsigned int max_cpus)
{
/*
* 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();
}
}
struct plat_smp_ops ssmtc_smp_ops = {
.send_ipi_single = ssmtc_send_ipi_single,
.send_ipi_mask = ssmtc_send_ipi_mask,
.init_secondary = ssmtc_init_secondary,
.smp_finish = ssmtc_smp_finish,
.cpus_done = ssmtc_cpus_done,
.boot_secondary = ssmtc_boot_secondary,
.smp_setup = ssmtc_smp_setup,
.prepare_cpus = ssmtc_prepare_cpus,
};
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