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

Message ID 20240430-armv7-cacheinfo-v1-1-e3d1caa40dc5@linaro.org (mailing list archive)
State New, archived
Headers show
Series ARM: implement cacheinfo support (for v7/v7m) | expand

Commit Message

Dmitry Baryshkov April 30, 2024, 1:20 a.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(+)
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Patch

diff --git a/arch/arm/include/asm/cachetype.h b/arch/arm/include/asm/cachetype.h
index e8c30430be33..90203a6d7270 100644
--- a/arch/arm/include/asm/cachetype.h
+++ b/arch/arm/include/asm/cachetype.h
@@ -81,6 +81,14 @@  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"
@@ -94,6 +102,11 @@  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