From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH v2 1/3] ARM: asm: Add convenience fucntions to access VBAR
Date: Sun, 10 Jan 2016 16:58:10 -0800 [thread overview]
Message-ID: <1452473892-19791-1-git-send-email-andrew.smirnov@gmail.com> (raw)
Add two functions to get/set VBAR register.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
Changes since v1 (http://lists.infradead.org/pipermail/barebox/2015-December/025685.html):
- Use CONFIG_CPU_32v7 instead of __LINUX_ARM_ARCH__
---
arch/arm/include/asm/system.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 26fb18c..b118a42 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -71,6 +71,26 @@ static inline void set_cr(unsigned int val)
isb();
}
+#ifdef CONFIG_CPU_32v7
+static inline unsigned int get_vbar(void)
+{
+ unsigned int vbar;
+ asm volatile("mrc p15, 0, %0, c12, c0, 0 @ get VBAR"
+ : "=r" (vbar) : : "cc");
+ return vbar;
+}
+
+static inline void set_vbar(unsigned int vbar)
+{
+ asm volatile("mcr p15, 0, %0, c12, c0, 0 @ set VBAR"
+ : : "r" (vbar) : "cc");
+ isb();
+}
+#else
+static inline unsigned int get_vbar(void) { return 0; }
+static inline void set_vbar(unsigned int vbar) {}
+#endif
+
#endif
#endif /* __ASM_ARM_SYSTEM_H */
--
2.5.0
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
next reply other threads:[~2016-01-11 0:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-11 0:58 Andrey Smirnov [this message]
2016-01-11 0:58 ` [PATCH 2/3] ARM: mmu: Add VBAR setup Andrey Smirnov
2016-01-11 0:58 ` [PATCH 3/3] ARM: Fix exception table setup in MMU-less mode Andrey Smirnov
2016-01-11 10:49 ` [PATCH v2 1/3] ARM: asm: Add convenience fucntions to access VBAR Sascha Hauer
2016-01-11 23:58 ` Andrey Smirnov
2016-01-12 8:45 ` Sascha Hauer
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=1452473892-19791-1-git-send-email-andrew.smirnov@gmail.com \
--to=andrew.smirnov@gmail.com \
--cc=barebox@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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox