MIPS: MSP71xx: Add VSMP/SMTC support. (088f3876) · Commits · 戴 / test

arch/mips/pmc-sierra/msp71xx/Makefile

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		@@ -10,3 +10,5 @@ obj-$(CONFIG_IRQ_MSP_CIC) += msp_irq_cic.o msp_irq_per.o
		obj-$(CONFIG_PCI) += msp_pci.o
		obj-$(CONFIG_MSPETH) += msp_eth.o
		obj-$(CONFIG_USB_MSP71XX) += msp_usb.o
		obj-$(CONFIG_MIPS_MT_SMP) += msp_smp.o
		obj-$(CONFIG_MIPS_MT_SMTC) += msp_smtc.o

arch/mips/pmc-sierra/msp71xx/msp_setup.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -146,6 +146,8 @@ void __init plat_mem_setup(void)
		pm_power_off = msp_power_off;
		}

		extern struct plat_smp_ops msp_smtc_smp_ops;

		void __init prom_init(void)
		{
		unsigned long family;
		@@ -226,6 +228,14 @@ void __init prom_init(void)
		*/
		msp_serial_setup();

		#ifdef CONFIG_MIPS_MT_SMP
		register_smp_ops(&vsmp_smp_ops);
		#endif

		#ifdef CONFIG_MIPS_MT_SMTC
		register_smp_ops(&msp_smtc_smp_ops);
		#endif

		#ifdef CONFIG_PMCTWILED
		/*
		* Setup LED states before the subsys_initcall loads other

arch/mips/pmc-sierra/msp71xx/msp_smp.c

0 → 100644

+77 −0

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		/*
		* Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc.
		* Copyright (C) 2001 Ralf Baechle
		* Copyright (C) 2010 PMC-Sierra, Inc.
		*
		* VSMP support for MSP platforms . Derived from malta vsmp support.
		*
		* 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.
		*
		*/
		#include <linux/smp.h>
		#include <linux/interrupt.h>

		#ifdef CONFIG_MIPS_MT_SMP
		#define MIPS_CPU_IPI_RESCHED_IRQ 0 /* SW int 0 for resched */
		#define MIPS_CPU_IPI_CALL_IRQ 1 /* SW int 1 for call */


		static void ipi_resched_dispatch(void)
		{
		do_IRQ(MIPS_CPU_IPI_RESCHED_IRQ);
		}

		static void ipi_call_dispatch(void)
		{
		do_IRQ(MIPS_CPU_IPI_CALL_IRQ);
		}

		static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
		{
		return IRQ_HANDLED;
		}

		static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
		{
		smp_call_function_interrupt();

		return IRQ_HANDLED;
		}

		static struct irqaction irq_resched = {
		.handler = ipi_resched_interrupt,
		.flags = IRQF_DISABLED \| IRQF_PERCPU,
		.name = "IPI_resched"
		};

		static struct irqaction irq_call = {
		.handler = ipi_call_interrupt,
		.flags = IRQF_DISABLED \| IRQF_PERCPU,
		.name = "IPI_call"
		};

		void __init arch_init_ipiirq(int irq, struct irqaction *action)
		{
		setup_irq(irq, action);
		set_irq_handler(irq, handle_percpu_irq);
		}

		void __init msp_vsmp_int_init(void)
		{
		set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
		set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
		arch_init_ipiirq(MIPS_CPU_IPI_RESCHED_IRQ, &irq_resched);
		arch_init_ipiirq(MIPS_CPU_IPI_CALL_IRQ, &irq_call);
		}
		#endif /* CONFIG_MIPS_MT_SMP */

arch/mips/pmc-sierra/msp71xx/msp_smtc.c

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+105 −0

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		/*
		* MSP71xx Platform-specific hooks for SMP operation
		*/
		#include <linux/irq.h>
		#include <linux/init.h>

		#include <asm/mipsmtregs.h>
		#include <asm/mipsregs.h>
		#include <asm/smtc.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 msp_smtc_send_ipi_single(int cpu, unsigned int action)
		{
		/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
		smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
		}

		static void msp_smtc_send_ipi_mask(const struct cpumask *mask,
		unsigned int action)
		{
		unsigned int i;

		for_each_cpu(i, mask)
		msp_smtc_send_ipi_single(i, action);
		}

		/*
		* Post-config but pre-boot cleanup entry point
		*/
		static void __cpuinit msp_smtc_init_secondary(void)
		{
		int myvpe;

		/* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */
		myvpe = read_c0_tcbind() & TCBIND_CURVPE;
		if (myvpe > 0)
		change_c0_status(ST0_IM, STATUSF_IP0 \| STATUSF_IP1 \|
		STATUSF_IP6 \| STATUSF_IP7);
		smtc_init_secondary();
		}

		/*
		* Platform "CPU" startup hook
		*/
		static void __cpuinit msp_smtc_boot_secondary(int cpu,
		struct task_struct *idle)
		{
		smtc_boot_secondary(cpu, idle);
		}

		/*
		* SMP initialization finalization entry point
		*/
		static void __cpuinit msp_smtc_smp_finish(void)
		{
		smtc_smp_finish();
		}

		/*
		* Hook for after all CPUs are online
		*/

		static void msp_smtc_cpus_done(void)
		{
		}

		/*
		* Platform SMP pre-initialization
		*
		* As noted above, we can assume a single CPU for now
		* but it may be multithreaded.
		*/

		static void __init msp_smtc_smp_setup(void)
		{
		/*
		* we won't get the definitive value until
		* we've run smtc_prepare_cpus later, but
		*/

		if (read_c0_config3() & (1 << 2))
		smp_num_siblings = smtc_build_cpu_map(0);
		}

		static void __init msp_smtc_prepare_cpus(unsigned int max_cpus)
		{
		smtc_prepare_cpus(max_cpus);
		}

		struct plat_smp_ops msp_smtc_smp_ops = {
		.send_ipi_single = msp_smtc_send_ipi_single,
		.send_ipi_mask = msp_smtc_send_ipi_mask,
		.init_secondary = msp_smtc_init_secondary,
		.smp_finish = msp_smtc_smp_finish,
		.cpus_done = msp_smtc_cpus_done,
		.boot_secondary = msp_smtc_boot_secondary,
		.smp_setup = msp_smtc_smp_setup,
		.prepare_cpus = msp_smtc_prepare_cpus,
		};

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