diff mbox series

[v2,1/2] ARM: add CLIDR accessor functions

Message ID 20241014-armv7-cacheinfo-v2-1-38ab76d2b7fa@linaro.org (mailing list archive)
State New, archived
Headers show
Series ARM: implement cacheinfo support (for v7/v7m) | expand

Commit Message

Dmitry Baryshkov Oct. 14, 2024, 1:55 p.m. UTC 
Add functions to read the CLIDR, Cache Level ID Register.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 arch/arm/include/asm/cachetype.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Comments

Linus Walleij Nov. 7, 2024, 1:51 p.m. UTC | #1 
On Mon, Oct 14, 2024 at 3:55 PM Dmitry Baryshkov
<dmitry.baryshkov@linaro.org> wrote:

> Add functions to read the CLIDR, Cache Level ID Register.
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij
diff mbox series

Patch

diff --git a/arch/arm/include/asm/cachetype.h b/arch/arm/include/asm/cachetype.h
index b9dbe1d4c8fe..b01c59076b84 100644
--- a/arch/arm/include/asm/cachetype.h
+++ b/arch/arm/include/asm/cachetype.h
@@ -83,6 +83,14 @@  static inline unsigned int read_ccsidr(void)
 	asm volatile("mrc p15, 1, %0, c0, c0, 0" : "=r" (val));
 	return val;
 }
+
+static inline unsigned int read_clidr(void)
+{
+	unsigned int val;
+
+	asm volatile("mrc p15, 1, %0, c0, c0, 1" : "=r" (val));
+	return val;
+}
 #else /* CONFIG_CPU_V7M */
 #include <linux/io.h>
 #include "asm/v7m.h"
@@ -96,6 +104,11 @@  static inline unsigned int read_ccsidr(void)
 {
 	return readl(BASEADDR_V7M_SCB + V7M_SCB_CCSIDR);
 }
+
+static inline unsigned int read_clidr(void)
+{
+	return readl(BASEADDR_V7M_SCB + V7M_SCB_CLIDR);
+}
 #endif
 
 #endif