[PATCH v2 1/7] arm: firmware: Check firmware is running or not

Bartlomiej Zolnierkiewicz
2014-06-02T12:35:37Z

From: Kyungmin Park <kyungmin.park@samsung.com>

To support multi-platform, it needs to know it's running under secure
OS or not. Sometimes it needs to access physical address by SMC calls.

e.g.,
if (firmware_run()) {
addr = physical address;
} else {
addr = virtual address;
}

call_firmware_ops(read_address, addr, &value);

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
arch/arm/common/firmware.c | 5 +++++
arch/arm/include/asm/firmware.h | 3 +++
2 files changed, 8 insertions(+)

diff --git a/arch/arm/common/firmware.c b/arch/arm/common/firmware.c
index 27ddccb..e9d9ee5 100644
--- a/arch/arm/common/firmware.c
+++ b/arch/arm/common/firmware.c
@@ -16,3 +16,8 @@
static const struct firmware_ops default_firmware_ops;

const struct firmware_ops *firmware_ops = &default_firmware_ops;
+
+int firmware_run(void)
+{
+ return firmware_ops != &default_firmware_ops;
+}
diff --git a/arch/arm/include/asm/firmware.h b/arch/arm/include/asm/firmware.h
index 2c9f10d..c72ec47 100644
--- a/arch/arm/include/asm/firmware.h
+++ b/arch/arm/include/asm/firmware.h
@@ -46,6 +46,9 @@ struct firmware_ops {
/* Global pointer for current firmware_ops structure, can't be NULL. */
extern const struct firmware_ops *firmware_ops;

+/* Check firmware is running */
+extern int firmware_run(void);
+
/*
* call_firmware_op(op, ...)
*
--
1.8.2.3