diff options
Diffstat (limited to 'arch/arm/mach-zynqmp/include/mach/debug_ll.h')
| -rw-r--r-- | arch/arm/mach-zynqmp/include/mach/debug_ll.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/mach-zynqmp/include/mach/debug_ll.h b/arch/arm/mach-zynqmp/include/mach/debug_ll.h new file mode 100644 index 0000000000..67571fe2e1 --- /dev/null +++ b/arch/arm/mach-zynqmp/include/mach/debug_ll.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __MACH_DEBUG_LL_H__ +#define __MACH_DEBUG_LL_H__ + +#include <io.h> + +#define ZYNQMP_UART0_BASE 0xFF000000 +#define ZYNQMP_UART1_BASE 0xFF010000 +#define ZYNQMP_UART_BASE ZYNQMP_UART0_BASE +#define ZYNQMP_DEBUG_LL_UART_BASE ZYNQMP_UART_BASE + +#define ZYNQMP_UART_RXTXFIFO 0x30 +#define ZYNQMP_UART_CHANNEL_STS 0x2C + +#define ZYNQMP_UART_STS_TFUL (1 << 4) +#define ZYNQMP_UART_TXDIS (1 << 5) + +static inline void PUTC_LL(int c) +{ + void __iomem *base = (void __iomem *)ZYNQMP_DEBUG_LL_UART_BASE; + + if (readl(base) & ZYNQMP_UART_TXDIS) + return; + + while ((readl(base + ZYNQMP_UART_CHANNEL_STS) & ZYNQMP_UART_STS_TFUL) != 0) + ; + + writel(c, base + 0x30); +} + +#endif |