[U-Boot] [PATCH] arm: dcc: Add uart dcc support for armv8

[U-Boot] [PATCH] arm: dcc: Add uart dcc support for armv8

[Michal Simek]

From: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>

Added UART DCC support for armv8

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

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(+)

diff --git a/drivers/serial/arm_dcc.c b/drivers/serial/arm_dcc.c
index e77773740fb0..df7eb05e8246 100644
--- a/drivers/serial/arm_dcc.c
+++ b/drivers/serial/arm_dcc.c
@@ -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)
-- 
2.3.5

[U-Boot] [PATCH] arm: dcc: Add uart dcc support for armv8

[Tom Rini]

On Fri, May 29, 2015 at 09:54:37AM +0200, Michal Simek wrote:

> From: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
> 
> Added UART DCC support for armv8
> 
> Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
> Signed-off-by: Michal Simek <michal.simek@xilinx.com>

Reviewed-by: Tom Rini <trini@konsulko.com>

-- 
Tom

[U-Boot] [PATCH] arm: dcc: Add uart dcc support for armv8

[Albert ARIBAUD]

Hello Michal,

On Fri, 29 May 2015 09:54:37 +0200, Michal Simek <michal.simek@xilinx.com> wrote:
> From: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
> 
> Added UART DCC support for armv8
> 
> Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
> ---
> 
> 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(+)
> 
> diff --git a/drivers/serial/arm_dcc.c b/drivers/serial/arm_dcc.c
> index e77773740fb0..df7eb05e8246 100644
> --- a/drivers/serial/arm_dcc.c
> +++ b/drivers/serial/arm_dcc.c
> @@ -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)
> -- 
> 2.3.5
> 
> _______________________________________________
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> U-Boot at lists.denx.de
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Applied to u-boot-arm/master, thanks!

Amicalement,
-- 
Albert.