From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Thu, 15 Nov 2012 23:46:23 +0100 Subject: [PATCH 4/6] ARM: sunxi: Add earlyprintk support In-Reply-To: <1353019586-21043-1-git-send-email-maxime.ripard@free-electrons.com> References: <1353019586-21043-1-git-send-email-maxime.ripard@free-electrons.com> Message-ID: <1353019586-21043-5-git-send-email-maxime.ripard@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Signed-off-by: Maxime Ripard --- arch/arm/Kconfig.debug | 8 ++++++++ arch/arm/include/debug/sunxi.S | 22 ++++++++++++++++++++++ 2 files changed, 30 insertions(+) create mode 100644 arch/arm/include/debug/sunxi.S diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index b0f3857..6672b02 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_UART + bool "Kernel low-level debugging messages via sunXi UART" + depends on ARCH_SUNXI + help + Say Y here if you want kernel low-level debugging support + on Allwinner A1X based platforms. + 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_UART 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..ffd101f --- /dev/null +++ b/arch/arm/include/debug/sunxi.S @@ -0,0 +1,22 @@ +/* + * 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. +*/ + +#define SUNXI_UART1_PHYS_BASE 0x01c28400 +#define SUNXI_UART1_VIRT_BASE 0xf1c28400 + + .macro addruart, rp, rv, tmp + ldr \rp, =SUNXI_UART1_PHYS_BASE + ldr \rv, =SUNXI_UART1_VIRT_BASE + .endm + +#define UART_SHIFT 2 +#include -- 1.7.9.5