linux-kernel - [PATCH 1/7] arm: firmware: Check firmware is running or not

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Date:	Mon, 05 May 2014 12:57:13 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Kukjin Kim <kgene.kim@...sung.com>
Cc:	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Tomasz Figa <t.figa@...sung.com>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	b.zolnierkie@...sung.com
Subject: [PATCH 1/7] arm: firmware: Check firmware is running or not

From: Kyungmin Park <kyungmin.park@...sung.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@...sung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.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

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