ARM: Make a compile firmware conditionally
PATCH v4 1/2 ARM: Make a compile firmware conditionally
From: Kyungmin Park <[email protected]>
Some boards can use the firmware at trustzone but others can't use this. However we need to build it simultaneously. To address this issue, introduce arm firmware support and use it at each board files.
e.g., In boot_secondary at mach-exynos/platsmp.c
__raw_writel(virt_to_phys(exynos4_secondary_startup),
CPU1_BOOT_REG);
if (IS_ENABLED(CONFIG_ARM_FIRMWARE)) {
/* Call Exynos specific smc call */
firmware_ops->cpu_boot(cpu);
}
gic_raise_softirq(cpumask_of(cpu), 1);
if (pen_release == -1)Now smp_ops is not yet merged, now just call the firmware_init at init_early
at board file
e.g., exynos4412 based board
static void __init board_init_early(void)
{
exynos_firmware_init();
}TODO
1. DT support.
2. call firmware init by smp_ops.
Signed-off-by Kyungmin Park <[email protected]>
---
arch/arm/common/Kconfig +3 -0
@@ -21,6 +21,9 @@ config ARM_VIC_NR The maximum number of VICs available in the system, for power management. +config ARM_FIRMWARE + bool + config ICST bool
arch/arm/common/Makefile +1 -0
@@ -4,6 +4,7 @@ obj-$(CONFIG_ARM_GIC) += gic.o obj-$(CONFIG_ARM_VIC) += vic.o +obj-$(CONFIG_ARM_FIRMWARE) += firmware.o obj-$(CONFIG_ICST) += icst.o obj-$(CONFIG_SA1111) += sa1111.o obj-$(CONFIG_PCI_HOST_VIA82C505) += via82c505.o
arch/arm/common/firmware.c new file +33 -0
@@ -0,0 +1,33 @@ +/* +* Copyright (C) 2012 Samsung Electronics. +* Kyungmin Park <[email protected]> +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License version 2 as +* published by the Free Software Foundation. +*/ + +#include <linux/kernel.h> +#include <linux/suspend.h> + +#include <asm/firmware.h> + +struct firmware_ops *firmware_ops; + +static void cpu_boot (int cpu) +{ +/* Do nothing */ +} + +static struct firmware_ops __firmware_ops = { + .do_idle = cpu_do_idle, + .cpu_boot = cpu_boot, +}; + +static int __init firmware_init (void ) +{ + firmware_ops = __firmware_ops; +return 0 ; +} + +core_initcall (firmware_init);
arch/arm/include/asm/firmware.h new file +20 -0
@@ -0,0 +1,20 @@ +/* +* Copyright (C) 2012 Samsung Electronics. +* Kyungmin Park <[email protected]> +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License version 2 as +* published by the Free Software Foundation. +*/ + +#ifndef __ASM_ARM_FIRMWARE_H +#define __ASM_ARM_FIRMWARE_H + +struct firmware_ops { +int (*do_idle)(void ); +void (*cpu_boot)(int cpu); +}; + +extern struct firmware_ops *firmware_ops; + +#endif