From 7366b92a77fc00357294819bb495896d7482f30c Mon Sep 17 00:00:00 2001 From: Tomasz Figa Date: Tue, 11 Dec 2012 13:58:43 +0900 Subject: ARM: Add interface for registering and calling firmware-specific operations Some boards are running with secure firmware running in TrustZone secure world, which changes the way some things have to be initialized. This patch adds an interface for platforms to specify available firmware operations and call them. A wrapper macro, call_firmware_op(), checks if the operation is provided and calls it if so, otherwise returns -ENOSYS to allow fallback to legacy operation.. By default no operations are provided. Example of use: In code using firmware ops: __raw_writel(virt_to_phys(exynos4_secondary_startup), CPU1_BOOT_REG); /* Call Exynos specific smc call */ if (call_firmware_op(cpu_boot, cpu) == -ENOSYS) cpu_boot_legacy(...); /* Try legacy way */ gic_raise_softirq(cpumask_of(cpu), 1); In board-/platform-specific code: static int platformX_do_idle(void) { /* tell platformX firmware to enter idle */ return 0; } static int platformX_cpu_boot(int i) { /* tell platformX firmware to boot CPU i */ return 0; } static const struct firmware_ops platformX_firmware_ops = { .do_idle = exynos_do_idle, .cpu_boot = exynos_cpu_boot, /* other operations not available on platformX */ }; static void __init board_init_early(void) { register_firmware_ops(&platformX_firmware_ops); } Signed-off-by: Kyungmin Park Signed-off-by: Tomasz Figa Signed-off-by: Kukjin Kim --- arch/arm/common/firmware.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 arch/arm/common/firmware.c (limited to 'arch/arm/common/firmware.c') diff --git a/arch/arm/common/firmware.c b/arch/arm/common/firmware.c new file mode 100644 index 000000000000..27ddccb1131f --- /dev/null +++ b/arch/arm/common/firmware.c @@ -0,0 +1,18 @@ +/* + * Copyright (C) 2012 Samsung Electronics. + * Kyungmin Park + * Tomasz Figa + * + * 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 +#include + +#include + +static const struct firmware_ops default_firmware_ops; + +const struct firmware_ops *firmware_ops = &default_firmware_ops; -- cgit