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| author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2012-11-08 15:40:49 +0400 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@free-electrons.com> | 2012-11-17 00:56:52 +0400 |
| commit | cb84fa18a40fb142d725bf5c7594a0a16cd96289 (patch) | |
| tree | bcebf62f92e66353267299fe482328749712bf7b /arch | |
| parent | 3b52634f0b7adaaf2b29569025287b938b7c71a6 (diff) | |
| download | linux-cb84fa18a40fb142d725bf5c7594a0a16cd96289.tar.xz | |
ARM: sunxi: Add earlyprintk support
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/Kconfig.debug | 8 | ||||
| -rw-r--r-- | arch/arm/include/debug/sunxi.S | 24 |
2 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index b0f3857b3a4c..f12bc3a2c3c0 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -345,6 +345,13 @@ choice Say Y here if you want kernel low-level debugging support on SOCFPGA based platforms. + config DEBUG_SUNXI_UART1 + bool "Kernel low-level debugging messages via sunXi UART1" + depends on ARCH_SUNXI + help + Say Y here if you want kernel low-level debugging support + on Allwinner A1X based platforms on the UART1. + config DEBUG_VEXPRESS_UART0_DETECT bool "Autodetect UART0 on Versatile Express Cortex-A core tiles" depends on ARCH_VEXPRESS && CPU_CP15_MMU @@ -416,6 +423,7 @@ config DEBUG_LL_INCLUDE default "debug/mvebu.S" if DEBUG_MVEBU_UART default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART default "debug/socfpga.S" if DEBUG_SOCFPGA_UART + default "debug/sunxi.S" if DEBUG_SUNXI_UART1 default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \ DEBUG_VEXPRESS_UART0_CA9 || DEBUG_VEXPRESS_UART0_RS1 default "mach/debug-macro.S" diff --git a/arch/arm/include/debug/sunxi.S b/arch/arm/include/debug/sunxi.S new file mode 100644 index 000000000000..3bf61ca0df75 --- /dev/null +++ b/arch/arm/include/debug/sunxi.S @@ -0,0 +1,24 @@ +/* + * Early serial output macro for Allwinner A1X SoCs + * + * Copyright (C) 2012 Maxime Ripard + * + * Maxime Ripard <maxime.ripard@free-electrons.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#ifdef CONFIG_DEBUG_SUNXI_UART1 +#define SUNXI_UART_DEBUG_PHYS_BASE 0x01c28400 +#define SUNXI_UART_DEBUG_VIRT_BASE 0xf1c28400 +#endif + + .macro addruart, rp, rv, tmp + ldr \rp, =SUNXI_UART_DEBUG_PHYS_BASE + ldr \rv, =SUNXI_UART_DEBUG_VIRT_BASE + .endm + +#define UART_SHIFT 2 +#include <asm/hardware/debug-8250.S> |