Commit 72e20142 authored by Paul Burton's avatar Paul Burton Committed by Ralf Baechle
Browse files

MIPS: Move GIC IPI functions out of smp-cmp.c 



The GIC IPI functions aren't necessarily specific to the "CMP
framework" SMP implementation, and will be used elsewhere in a
subsequent commit. This patch adds cleaned up GIC IPI functions to a
separate file which is compiled when a new CONFIG_MIPS_GIC_IPI Kconfig
symbol is selected, and selects that symbol for CONFIG_MIPS_CMP.

Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6359/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 1d688087

arch/mips/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -1996,12 +1996,16 @@ config MIPS_VPE_APSP_API_MT 
config MIPS_CMP

	bool "MIPS CMP support"

	depends on SYS_SUPPORTS_MIPS_CMP && MIPS_MT_SMP

	select MIPS_GIC_IPI

	select SYNC_R4K

	select WEAK_ORDERING

	default n

	help

	  Enable Coherency Manager processor (CMP) support.



config MIPS_GIC_IPI

	bool



config SB1_PASS_1_WORKAROUNDS

	bool

	depends on CPU_SB1_PASS_1

arch/mips/include/asm/smp-ops.h

+3 −0
Original line number Diff line number Diff line
@@ -58,6 +58,9 @@ static inline void register_smp_ops(struct plat_smp_ops *ops) 


#endif /* !CONFIG_SMP */



extern void gic_send_ipi_single(int cpu, unsigned int action);

extern void gic_send_ipi_mask(const struct cpumask *mask, unsigned int action);



static inline int register_up_smp_ops(void)

{

#ifdef CONFIG_SMP_UP

arch/mips/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ obj-$(CONFIG_MIPS_MT_FPAFF) += mips-mt-fpaff.o 
obj-$(CONFIG_MIPS_MT_SMTC)	+= smtc.o smtc-asm.o smtc-proc.o

obj-$(CONFIG_MIPS_MT_SMP)	+= smp-mt.o

obj-$(CONFIG_MIPS_CMP)		+= smp-cmp.o

obj-$(CONFIG_MIPS_GIC_IPI)	+= smp-gic.o

obj-$(CONFIG_CPU_MIPSR2)	+= spram.o



obj-$(CONFIG_MIPS_VPE_LOADER)	+= vpe.o

arch/mips/kernel/smp-cmp.c

+2 −50
Original line number Diff line number Diff line
@@ -39,54 +39,6 @@ 
#include <asm/amon.h>

#include <asm/gic.h>



static void ipi_call_function(unsigned int cpu)

{

	pr_debug("CPU%d: %s cpu %d status %08x\n",

		 smp_processor_id(), __func__, cpu, read_c0_status());



	gic_send_ipi(plat_ipi_call_int_xlate(cpu));

}





static void ipi_resched(unsigned int cpu)

{

	pr_debug("CPU%d: %s cpu %d status %08x\n",

		 smp_processor_id(), __func__, cpu, read_c0_status());



	gic_send_ipi(plat_ipi_resched_int_xlate(cpu));

}



/*

 * FIXME: This isn't restricted to CMP

 * The SMVP kernel could use GIC interrupts if available

 */

void cmp_send_ipi_single(int cpu, unsigned int action)

{

	unsigned long flags;



	local_irq_save(flags);



	switch (action) {

	case SMP_CALL_FUNCTION:

		ipi_call_function(cpu);

		break;



	case SMP_RESCHEDULE_YOURSELF:

		ipi_resched(cpu);

		break;

	}



	local_irq_restore(flags);

}



static void cmp_send_ipi_mask(const struct cpumask *mask, unsigned int action)

{

	unsigned int i;



	for_each_cpu(i, mask)

		cmp_send_ipi_single(i, action);

}



static void cmp_init_secondary(void)

{

	struct cpuinfo_mips *c = &current_cpu_data;
@@ -210,8 +162,8 @@ void __init cmp_prepare_cpus(unsigned int max_cpus) 
}



struct plat_smp_ops cmp_smp_ops = {

	.send_ipi_single	= cmp_send_ipi_single,

	.send_ipi_mask		= cmp_send_ipi_mask,

	.send_ipi_single	= gic_send_ipi_single,

	.send_ipi_mask		= gic_send_ipi_mask,

	.init_secondary		= cmp_init_secondary,

	.smp_finish		= cmp_smp_finish,

	.cpus_done		= cmp_cpus_done,

arch/mips/kernel/smp-gic.c

0 → 100644
+53 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2013 Imagination Technologies

 * Author: Paul Burton <paul.burton@imgtec.com>

 *

 * Based on smp-cmp.c:

 *  Copyright (C) 2007 MIPS Technologies, Inc.

 *  Author: Chris Dearman (chris@mips.com)

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by the

 * Free Software Foundation;  either version 2 of the  License, or (at your

 * option) any later version.

 */



#include <linux/printk.h>



#include <asm/gic.h>

#include <asm/smp-ops.h>



void gic_send_ipi_single(int cpu, unsigned int action)

{

	unsigned long flags;

	unsigned int intr;



	pr_debug("CPU%d: %s cpu %d action %u status %08x\n",

		 smp_processor_id(), __func__, cpu, action, read_c0_status());



	local_irq_save(flags);



	switch (action) {

	case SMP_CALL_FUNCTION:

		intr = plat_ipi_call_int_xlate(cpu);

		break;



	case SMP_RESCHEDULE_YOURSELF:

		intr = plat_ipi_resched_int_xlate(cpu);

		break;



	default:

		BUG();

	}



	gic_send_ipi(intr);

	local_irq_restore(flags);

}



void gic_send_ipi_mask(const struct cpumask *mask, unsigned int action)

{

	unsigned int i;



	for_each_cpu(i, mask)

		gic_send_ipi_single(i, action);

}

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