sh: smp: Hook in to the generic IPI handler for SH-X3 SMP. (c7936b9a) · Commits · e / devices / android_kernel_oneplus_sm7250

arch/sh/include/asm/smp.h

+0 −2

Original line number	Diff line number	Diff line
		@@ -32,8 +32,6 @@ void plat_prepare_cpus(unsigned int max_cpus);
		int plat_smp_processor_id(void);
		void plat_start_cpu(unsigned int cpu, unsigned long entry_point);
		void plat_send_ipi(unsigned int cpu, unsigned int message);
		int plat_register_ipi_handler(unsigned int message,
		void (handler)(void ), void *arg);
		extern void arch_send_call_function_single_ipi(int cpu);
		extern void arch_send_call_function_ipi(cpumask_t mask);

arch/sh/kernel/cpu/sh4a/smp-shx3.c

+24 −41

Original line number	Diff line number	Diff line
		/*
		* SH-X3 SMP
		*
		* Copyright (C) 2007 Paul Mundt
		* Copyright (C) 2007 - 2008 Paul Mundt
		* Copyright (C) 2007 Magnus Damm
		*
		* This file is subject to the terms and conditions of the GNU General Public
		@@ -14,6 +14,22 @@
		#include <linux/interrupt.h>
		#include <linux/io.h>

		static irqreturn_t ipi_interrupt_handler(int irq, void *arg)
		{
		unsigned int message = (unsigned int)(long)arg;
		unsigned int cpu = hard_smp_processor_id();
		unsigned int offs = 4 * cpu;
		unsigned int x;

		x = ctrl_inl(0xfe410070 + offs); /* C0INITICI..CnINTICI */
		x &= (1 << (message << 2));
		ctrl_outl(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */

		smp_message_recv(message);

		return IRQ_HANDLED;
		}

		void __init plat_smp_setup(void)
		{
		unsigned int cpu = 0;
		@@ -40,6 +56,13 @@ void __init plat_smp_setup(void)

		void __init plat_prepare_cpus(unsigned int max_cpus)
		{
		int i;

		BUILD_BUG_ON(SMP_MSG_NR >= 8);

		for (i = 0; i < SMP_MSG_NR; i++)
		request_irq(104 + i, ipi_interrupt_handler, IRQF_DISABLED,
		"IPI", (void *)(long)i);
		}

		#define STBCR_REG(phys_id) (0xfe400004 \| (phys_id << 12))
		@@ -75,46 +98,6 @@ void plat_send_ipi(unsigned int cpu, unsigned int message)
		unsigned long addr = 0xfe410070 + (cpu * 4);

		BUG_ON(cpu >= 4);
		BUG_ON(message >= SMP_MSG_NR);

		ctrl_outl(1 << (message << 2), addr); /* C0INTICI..CnINTICI */
		}

		struct ipi_data {
		void (handler)(void );
		void *arg;
		unsigned int message;
		};

		static irqreturn_t ipi_interrupt_handler(int irq, void *arg)
		{
		struct ipi_data *id = arg;
		unsigned int cpu = hard_smp_processor_id();
		unsigned int offs = 4 * cpu;
		unsigned int x;

		x = ctrl_inl(0xfe410070 + offs); /* C0INITICI..CnINTICI */
		x &= (1 << (id->message << 2));
		ctrl_outl(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */

		id->handler(id->arg);

		return IRQ_HANDLED;
		}

		static struct ipi_data ipi_handlers[SMP_MSG_NR];

		int plat_register_ipi_handler(unsigned int message,
		void (handler)(void ), void *arg)
		{
		struct ipi_data *id = &ipi_handlers[message];

		BUG_ON(SMP_MSG_NR >= 8);
		BUG_ON(message >= SMP_MSG_NR);

		id->handler = handler;
		id->arg = arg;
		id->message = message;

		return request_irq(104 + message, ipi_interrupt_handler, 0, "IPI", id);
		}