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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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118 lines
2.7 KiB
C
118 lines
2.7 KiB
C
/*
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* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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*/
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/*
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* Simulator Platform-specific hooks for SMTC operation
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/cpumask.h>
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#include <linux/interrupt.h>
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#include <linux/smp.h>
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#include <asm/atomic.h>
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#include <asm/cpu.h>
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#include <asm/processor.h>
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#include <asm/system.h>
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#include <asm/mmu_context.h>
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#include <asm/smtc_ipi.h>
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/* VPE/SMP Prototype implements platform interfaces directly */
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/*
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* Cause the specified action to be performed on a targeted "CPU"
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*/
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static void ssmtc_send_ipi_single(int cpu, unsigned int action)
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{
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smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
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/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
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}
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static inline void ssmtc_send_ipi_mask(cpumask_t mask, unsigned int action)
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{
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unsigned int i;
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for_each_cpu_mask(i, mask)
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ssmtc_send_ipi_single(i, action);
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}
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/*
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* Post-config but pre-boot cleanup entry point
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*/
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static void __cpuinit ssmtc_init_secondary(void)
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{
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void smtc_init_secondary(void);
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smtc_init_secondary();
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}
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/*
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* SMP initialization finalization entry point
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*/
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static void __cpuinit ssmtc_smp_finish(void)
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{
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smtc_smp_finish();
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}
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/*
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* Hook for after all CPUs are online
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*/
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static void ssmtc_cpus_done(void)
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{
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}
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/*
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* Platform "CPU" startup hook
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*/
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static void __cpuinit ssmtc_boot_secondary(int cpu, struct task_struct *idle)
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{
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smtc_boot_secondary(cpu, idle);
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}
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static void __init ssmtc_smp_setup(void)
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{
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if (read_c0_config3() & (1 << 2))
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mipsmt_build_cpu_map(0);
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}
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/*
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* Platform SMP pre-initialization
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*/
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static void ssmtc_prepare_cpus(unsigned int max_cpus)
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{
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/*
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* As noted above, we can assume a single CPU for now
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* but it may be multithreaded.
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*/
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if (read_c0_config3() & (1 << 2)) {
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mipsmt_prepare_cpus();
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}
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}
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struct plat_smp_ops ssmtc_smp_ops = {
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.send_ipi_single = ssmtc_send_ipi_single,
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.send_ipi_mask = ssmtc_send_ipi_mask,
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.init_secondary = ssmtc_init_secondary,
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.smp_finish = ssmtc_smp_finish,
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.cpus_done = ssmtc_cpus_done,
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.boot_secondary = ssmtc_boot_secondary,
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.smp_setup = ssmtc_smp_setup,
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.prepare_cpus = ssmtc_prepare_cpus,
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};
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