From: kmpark@infradead.org (Kyungmin Park)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm: firmware: Check firmware is running or not
Date: Tue, 22 Oct 2013 10:45:56 +0900 [thread overview]
Message-ID: <20131022014556.GA1364@july> (raw)
From: Kyungmin Park <kyungmin.park@samsung.com>
To support multi-platform, it needs to know it's running under secure OS or not.
sometime 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>
---
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 1563130..efc4554 100644
--- a/arch/arm/include/asm/firmware.h
+++ b/arch/arm/include/asm/firmware.h
@@ -42,6 +42,9 @@ 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, ...)
*
reply other threads:[~2013-10-22 1:45 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20131022014556.GA1364@july \
--to=kmpark@infradead.org \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.