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-rw-r--r--arch/mips/mips-boards/sim/sim_smp.c151
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diff --git a/arch/mips/mips-boards/sim/sim_smp.c b/arch/mips/mips-boards/sim/sim_smp.c
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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
+ void smtc_send_ipi(int, int, unsigned int);
+
+ 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
+ extern int mipsmt_build_cpu_map(int startslot);
+ int nextslot;
+
+ cpus_clear(phys_cpu_present_map);
+
+ /* Register the boot CPU */
+
+ smp_prepare_boot_cpu();
+
+ /*
+ * 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
+ extern void smtc_boot_secondary(int cpu, struct task_struct *t);
+
+ 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
+ void mipsmt_prepare_cpus(int c);
+ /*
+ * 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
+ void smtc_smp_finish(void);
+
+ 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 */