From: Maxime Ripard Date: Thu, 8 Nov 2012 11:40:49 +0000 (+0100) Subject: ARM: sunxi: Add earlyprintk support X-Git-Tag: v3.8-rc1~143^2~1^2~8 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cb84fa18a40fb142d725bf5c7594a0a16cd96289;p=platform%2Fkernel%2Flinux-exynos.git ARM: sunxi: Add earlyprintk support Signed-off-by: Maxime Ripard Acked-by: Stefan Roese --- diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index b0f3857..f12bc3a 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 0000000..3bf61ca --- /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 + * + * 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