[PATCH 1/6] ARM: introduce debug_ll_pl011.h

[Antony Pavlov]

Signed-off-by: Antony Pavlov <antonynpavlov at gmail.com>
---
 arch/arm/include/asm/debug_ll_pl011.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/include/asm/debug_ll_pl011.h b/arch/arm/include/asm/debug_ll_pl011.h
new file mode 100644
index 0000000..db015a3
--- /dev/null
+++ b/arch/arm/include/asm/debug_ll_pl011.h
@@ -0,0 +1,25 @@
+#ifndef __INCLUDE_ARM_ASM_DEBUG_LL_PL011_H__
+#define __INCLUDE_ARM_ASM_DEBUG_LL_PL011_H__
+
+#ifndef DEBUG_LL_UART_ADDR
+#error DEBUG_LL_UART_ADDR is undefined!
+#endif
+
+#include <io.h>
+#include <linux/amba/serial.h>
+
+static inline void PUTC_LL(char c)
+{
+	/* Wait until there is space in the FIFO */
+	while (readl(DEBUG_LL_UART_ADDR + UART01x_FR) & UART01x_FR_TXFF)
+		;
+
+	/* Send the character */
+	writel(c, DEBUG_LL_UART_ADDR + UART01x_DR);
+
+	/* Wait to make sure it hits the line, in case we die too soon. */
+	while (readl(DEBUG_LL_UART_ADDR + UART01x_FR) & UART01x_FR_TXFF)
+		;
+}
+
+#endif /* __INCLUDE_ARM_ASM_DEBUG_LL_PL011_H__ */
-- 
2.1.3