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irqchip: bcm2836: Move SMP startup code to arch/arm (v2) 

In order to easily provide SMP for BCM2837 on 32-bit and 64-bit
the SMP startup code was placed in irq-bcm2836. That's not the
right approach. So move this code where it belongs.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: 41f4988cc2 ("irqchip/bcm2836: Add SMP support for the 2836")
Tested-by: Eric Anholt <eric@anholt.net>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Stefan Wahren 2017-08-06 17:52:02 +02:00 committed by Florian Fainelli
parent 1d66af8190
commit 88bbe85dcd
6 changed files with 127 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/mach-bcm/Makefile
View File

@ -43,6 +43,11 @@ endif
# BCM2835
obj-$(CONFIG_ARCH_BCM2835) += board_bcm2835.o
ifeq ($(CONFIG_ARCH_BCM2835),y)
ifeq ($(CONFIG_ARM),y)
obj-$(CONFIG_SMP) += platsmp.o
endif
endif
# BCM5301X
obj-$(CONFIG_ARCH_BCM_5301X) += bcm_5301x.o

6
arch/arm/mach-bcm/board_bcm2835.c
View File

@ -19,16 +19,20 @@
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include "platsmp.h"
static const char * const bcm2835_compat[] = {
#ifdef CONFIG_ARCH_MULTI_V6
"brcm,bcm2835",
#endif
#ifdef CONFIG_ARCH_MULTI_V7
"brcm,bcm2836",
"brcm,bcm2837",
#endif
NULL
};
DT_MACHINE_START(BCM2835, "BCM2835")
.dt_compat = bcm2835_compat
.dt_compat = bcm2835_compat,
.smp = smp_ops(bcm2836_smp_ops),
MACHINE_END

35
arch/arm/mach-bcm/platsmp.c
View File

@ -17,6 +17,7 @@
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irqchip/irq-bcm2836.h>
#include <linux/jiffies.h>
#include <linux/of.h>
#include <linux/of_address.h>
@ -287,6 +288,35 @@ out:
return ret;
}
static int bcm2836_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
void __iomem *intc_base;
struct device_node *dn;
char *name;
name = "brcm,bcm2836-l1-intc";
dn = of_find_compatible_node(NULL, NULL, name);
if (!dn) {
pr_err("unable to find intc node\n");
return -ENODEV;
}
intc_base = of_iomap(dn, 0);
of_node_put(dn);
if (!intc_base) {
pr_err("unable to remap intc base register\n");
return -ENOMEM;
}
writel(virt_to_phys(secondary_startup),
intc_base + LOCAL_MAILBOX3_SET0 + 16 * cpu);
iounmap(intc_base);
return 0;
}
static const struct smp_operations kona_smp_ops __initconst = {
.smp_prepare_cpus = bcm_smp_prepare_cpus,
.smp_boot_secondary = kona_boot_secondary,
@ -305,3 +335,8 @@ static const struct smp_operations nsp_smp_ops __initconst = {
.smp_boot_secondary = nsp_boot_secondary,
};
CPU_METHOD_OF_DECLARE(bcm_smp_nsp, "brcm,bcm-nsp-smp", &nsp_smp_ops);
const struct smp_operations bcm2836_smp_ops __initconst = {
.smp_boot_secondary = bcm2836_boot_secondary,
};
CPU_METHOD_OF_DECLARE(bcm_smp_bcm2836, "brcm,bcm2836-smp", &bcm2836_smp_ops);

10
arch/arm/mach-bcm/platsmp.h Normal file
View File

@ -0,0 +1,10 @@
/*
* Copyright (C) 2017 Stefan Wahren <stefan.wahren@i2se.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 version 2.
*
*/
extern const struct smp_operations bcm2836_smp_ops;

79
drivers/irqchip/irq-bcm2836.c
View File

@ -19,63 +19,10 @@
#include <linux/of_irq.h>
#include <linux/irqchip.h>
#include <linux/irqdomain.h>
#include <linux/irqchip/irq-bcm2836.h>
#include <asm/exception.h>
#define LOCAL_CONTROL 0x000
#define LOCAL_PRESCALER 0x008
/*
* The low 2 bits identify the CPU that the GPU IRQ goes to, and the
* next 2 bits identify the CPU that the GPU FIQ goes to.
*/
#define LOCAL_GPU_ROUTING 0x00c
/* When setting bits 0-3, enables PMU interrupts on that CPU. */
#define LOCAL_PM_ROUTING_SET 0x010
/* When setting bits 0-3, disables PMU interrupts on that CPU. */
#define LOCAL_PM_ROUTING_CLR 0x014
/*
* The low 4 bits of this are the CPU's timer IRQ enables, and the
* next 4 bits are the CPU's timer FIQ enables (which override the IRQ
* bits).
*/
#define LOCAL_TIMER_INT_CONTROL0 0x040
/*
* The low 4 bits of this are the CPU's per-mailbox IRQ enables, and
* the next 4 bits are the CPU's per-mailbox FIQ enables (which
* override the IRQ bits).
*/
#define LOCAL_MAILBOX_INT_CONTROL0 0x050
/*
* The CPU's interrupt status register. Bits are defined by the the
* LOCAL_IRQ_* bits below.
*/
#define LOCAL_IRQ_PENDING0 0x060
/* Same status bits as above, but for FIQ. */
#define LOCAL_FIQ_PENDING0 0x070
/*
* Mailbox write-to-set bits. There are 16 mailboxes, 4 per CPU, and
* these bits are organized by mailbox number and then CPU number. We
* use mailbox 0 for IPIs. The mailbox's interrupt is raised while
* any bit is set.
*/
#define LOCAL_MAILBOX0_SET0 0x080
#define LOCAL_MAILBOX3_SET0 0x08c
/* Mailbox write-to-clear bits. */
#define LOCAL_MAILBOX0_CLR0 0x0c0
#define LOCAL_MAILBOX3_CLR0 0x0cc
#define LOCAL_IRQ_CNTPSIRQ 0
#define LOCAL_IRQ_CNTPNSIRQ 1
#define LOCAL_IRQ_CNTHPIRQ 2
#define LOCAL_IRQ_CNTVIRQ 3
#define LOCAL_IRQ_MAILBOX0 4
#define LOCAL_IRQ_MAILBOX1 5
#define LOCAL_IRQ_MAILBOX2 6
#define LOCAL_IRQ_MAILBOX3 7
#define LOCAL_IRQ_GPU_FAST 8
#define LOCAL_IRQ_PMU_FAST 9
#define LAST_IRQ LOCAL_IRQ_PMU_FAST
struct bcm2836_arm_irqchip_intc {
struct irq_domain *domain;
void __iomem *base;
@ -215,24 +162,6 @@ static int bcm2836_cpu_dying(unsigned int cpu)
cpu);
return 0;
}
#ifdef CONFIG_ARM
static int __init bcm2836_smp_boot_secondary(unsigned int cpu,
struct task_struct *idle)
{
unsigned long secondary_startup_phys =
(unsigned long)virt_to_phys((void *)secondary_startup);
writel(secondary_startup_phys,
intc.base + LOCAL_MAILBOX3_SET0 + 16 * cpu);
return 0;
}
static const struct smp_operations bcm2836_smp_ops __initconst = {
.smp_boot_secondary = bcm2836_smp_boot_secondary,
};
#endif
#endif
static const struct irq_domain_ops bcm2836_arm_irqchip_intc_ops = {
@ -249,10 +178,6 @@ bcm2836_arm_irqchip_smp_init(void)
bcm2836_cpu_dying);
set_smp_cross_call(bcm2836_arm_irqchip_send_ipi);
#ifdef CONFIG_ARM
smp_set_ops(&bcm2836_smp_ops);
#endif
#endif
}

70
include/linux/irqchip/irq-bcm2836.h Normal file
View File

@ -0,0 +1,70 @@
/*
* Root interrupt controller for the BCM2836 (Raspberry Pi 2).
*
* Copyright 2015 Broadcom
*
* 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.
*
* This program is distributed in the hope that 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.
*/
#define LOCAL_CONTROL 0x000
#define LOCAL_PRESCALER 0x008
/*
* The low 2 bits identify the CPU that the GPU IRQ goes to, and the
* next 2 bits identify the CPU that the GPU FIQ goes to.
*/
#define LOCAL_GPU_ROUTING 0x00c
/* When setting bits 0-3, enables PMU interrupts on that CPU. */
#define LOCAL_PM_ROUTING_SET 0x010
/* When setting bits 0-3, disables PMU interrupts on that CPU. */
#define LOCAL_PM_ROUTING_CLR 0x014
/*
* The low 4 bits of this are the CPU's timer IRQ enables, and the
* next 4 bits are the CPU's timer FIQ enables (which override the IRQ
* bits).
*/
#define LOCAL_TIMER_INT_CONTROL0 0x040
/*
* The low 4 bits of this are the CPU's per-mailbox IRQ enables, and
* the next 4 bits are the CPU's per-mailbox FIQ enables (which
* override the IRQ bits).
*/
#define LOCAL_MAILBOX_INT_CONTROL0 0x050
/*
* The CPU's interrupt status register. Bits are defined by the the
* LOCAL_IRQ_* bits below.
*/
#define LOCAL_IRQ_PENDING0 0x060
/* Same status bits as above, but for FIQ. */
#define LOCAL_FIQ_PENDING0 0x070
/*
* Mailbox write-to-set bits. There are 16 mailboxes, 4 per CPU, and
* these bits are organized by mailbox number and then CPU number. We
* use mailbox 0 for IPIs. The mailbox's interrupt is raised while
* any bit is set.
*/
#define LOCAL_MAILBOX0_SET0 0x080
#define LOCAL_MAILBOX3_SET0 0x08c
/* Mailbox write-to-clear bits. */
#define LOCAL_MAILBOX0_CLR0 0x0c0
#define LOCAL_MAILBOX3_CLR0 0x0cc
#define LOCAL_IRQ_CNTPSIRQ 0
#define LOCAL_IRQ_CNTPNSIRQ 1
#define LOCAL_IRQ_CNTHPIRQ 2
#define LOCAL_IRQ_CNTVIRQ 3
#define LOCAL_IRQ_MAILBOX0 4
#define LOCAL_IRQ_MAILBOX1 5
#define LOCAL_IRQ_MAILBOX2 6
#define LOCAL_IRQ_MAILBOX3 7
#define LOCAL_IRQ_GPU_FAST 8
#define LOCAL_IRQ_PMU_FAST 9
#define LAST_IRQ LOCAL_IRQ_PMU_FAST