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arm: dcc: Add uart dcc support for armv8

PATCH New Michal Simek 3 participants 3 messages May 29, 2015 – Jul 2, 2015

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Michal Simek

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#0 lore raw

PATCH 1/1 arm: dcc: Add uart dcc support for armv8

From: Siva Durga Prasad Paladugu <[email protected]>

Added UART DCC support for armv8

Signed-off-by Siva Durga Prasad Paladugu <[email protected]>
Signed-off-by Michal Simek <[email protected]>

---

Not sure if CONFIG_CPU_ARMV8 is the right symbol but we are following pattern above. Maybe CONFIG_ARM64?

---
 drivers/serial/arm_dcc.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
drivers/serial/arm_dcc.c +16 -0
index e77773740fb0..df7eb05e8246 100644
@@ -61,6 +61,22 @@
 #define status_dcc(x)	\
 		__asm__ volatile ("mrc p14, 0, %0, c14, c0, 0\n" : "=r" (x))
 
+#elif defined(CONFIG_CPU_ARMV8)
+/*
+ * ARMV8
+ */
+#define DCC_RBIT	(1 << 30)
+#define DCC_WBIT	(1 << 29)
+
+#define write_dcc(x)   \
+		__asm__ volatile ("msr dbgdtrtx_el0, %0\n" : : "r" (x))
+
+#define read_dcc(x)    \
+		__asm__ volatile ("mrs %0, dbgdtrrx_el0\n" : "=r" (x))
+
+#define status_dcc(x)  \
+		__asm__ volatile ("mrs %0, mdccsr_el0\n" : "=r" (x))
+
 #else
 #define DCC_RBIT	(1 << 0)
 #define DCC_WBIT	(1 << 1)
Signature · 1 line
2.3.5
#2 lore raw

PATCH 1/1 arm: dcc: Add uart dcc support for armv8

In reply to Michal Simek

Hello Michal,

Quoted 49 lines · Michal Simek

From: Siva Durga Prasad Paladugu <[email protected]>

Added UART DCC support for armv8

Signed-off-by Siva Durga Prasad Paladugu <[email protected]>
Signed-off-by Michal Simek <[email protected]>

---

Not sure if CONFIG_CPU_ARMV8 is the right symbol but we are following pattern above. Maybe CONFIG_ARM64?

---
 drivers/serial/arm_dcc.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
drivers/serial/arm_dcc.c +16 -0
index e77773740fb0..df7eb05e8246 100644
@@ -61,6 +61,22 @@
 #define status_dcc(x)	\
 		__asm__ volatile ("mrc p14, 0, %0, c14, c0, 0\n" : "=r" (x))
 
+#elif defined(CONFIG_CPU_ARMV8)
+/*
+ * ARMV8
+ */
+#define DCC_RBIT	(1 << 30)
+#define DCC_WBIT	(1 << 29)
+
+#define write_dcc(x)   \
+		__asm__ volatile ("msr dbgdtrtx_el0, %0\n" : : "r" (x))
+
+#define read_dcc(x)    \
+		__asm__ volatile ("mrs %0, dbgdtrrx_el0\n" : "=r" (x))
+
+#define status_dcc(x)  \
+		__asm__ volatile ("mrs %0, mdccsr_el0\n" : "=r" (x))
+
 #else
 #define DCC_RBIT	(1 << 0)
 #define DCC_WBIT	(1 << 1)
Signature · 6 lines
2.3.5

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Applied to u-boot-arm/master, thanks!

Amicalement,

Signature · 1 line
Albert.