From cfdb7d564c03a06e00f76a5e9b3929f802c1040b Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Wed, 5 Mar 2014 23:07:48 +0100 Subject: [PATCH] ARM: vf610: add UART choice for low-level debug Add choice for low-level debug UART. Similar to i.MX6, there is a numeric configuration, valid choices are 0 to 3. Note that the kernel assumes that the boot loader initialized clock properly. Signed-off-by: Stefan Agner Signed-off-by: Shawn Guo --- arch/arm/Kconfig.debug | 9 +++++++++ arch/arm/include/debug/vf.S | 15 +++++++++++++-- 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index eab8ecbe69c1..00c69503da22 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -942,6 +942,15 @@ config DEBUG_IMX_UART_PORT Choose UART port on which kernel low-level debug messages should be output. +config DEBUG_VF_UART_PORT + int "Vybrid Debug UART Port Selection" if DEBUG_VF_UART + default 1 + range 0 3 + depends on SOC_VF610 + help + Choose UART port on which kernel low-level debug messages + should be output. + config DEBUG_TEGRA_UART bool depends on ARCH_TEGRA diff --git a/arch/arm/include/debug/vf.S b/arch/arm/include/debug/vf.S index ba12cc44b2cb..b88933849a17 100644 --- a/arch/arm/include/debug/vf.S +++ b/arch/arm/include/debug/vf.S @@ -7,9 +7,20 @@ * */ +#define VF_UART0_BASE_ADDR 0x40027000 +#define VF_UART1_BASE_ADDR 0x40028000 +#define VF_UART2_BASE_ADDR 0x40029000 +#define VF_UART3_BASE_ADDR 0x4002a000 +#define VF_UART_BASE_ADDR(n) VF_UART##n##_BASE_ADDR +#define VF_UART_BASE(n) VF_UART_BASE_ADDR(n) +#define VF_UART_PHYSICAL_BASE VF_UART_BASE(CONFIG_DEBUG_VF_UART_PORT) + +#define VF_UART_VIRTUAL_BASE 0xfe000000 + .macro addruart, rp, rv, tmp - ldr \rp, =0x40028000 @ physical - ldr \rv, =0xfe028000 @ virtual + ldr \rp, =VF_UART_PHYSICAL_BASE @ physical + and \rv, \rp, #0xffffff @ offset within 16MB section + add \rv, \rv, #VF_UART_VIRTUAL_BASE .endm .macro senduart, rd, rx -- 2.20.1