ARM: 7850/1: DEBUG_LL on efm32 SoCs (494e492d) · Commits · 戴 / test

arch/arm/Kconfig.debug

+17 −0

Original line number	Diff line number	Diff line
		@@ -834,6 +834,20 @@ choice
		options; the platform specific options are deprecated
		and will be soon removed.

		config DEBUG_LL_UART_EFM32
		bool "Kernel low-level debugging via efm32 UART"
		depends on ARCH_EFM32
		help
		Say Y here if you want the debug print routines to direct
		their output to an UART or USART port on efm32 based
		machines. Use the following addresses for DEBUG_UART_PHYS:

		0x4000c000 \| USART0
		0x4000c400 \| USART1
		0x4000c800 \| USART2
		0x4000e000 \| UART0
		0x4000e400 \| UART1

		config DEBUG_LL_UART_PL01X
		bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART"
		help
		@@ -885,6 +899,7 @@ config DEBUG_LL_INCLUDE
		default "debug/8250.S" if DEBUG_LL_UART_8250 \|\| DEBUG_UART_8250
		default "debug/pl01x.S" if DEBUG_LL_UART_PL01X \|\| DEBUG_UART_PL01X
		default "debug/exynos.S" if DEBUG_EXYNOS_UART
		default "debug/efm32.S" if DEBUG_LL_UART_EFM32
		default "debug/icedcc.S" if DEBUG_ICEDCC
		default "debug/imx.S" if DEBUG_IMX1_UART \|\| \
		DEBUG_IMX25_UART \|\| \
		@@ -951,6 +966,7 @@ config DEBUG_UART_PHYS
		default 0x20064000 if DEBUG_RK29_UART1 \|\| DEBUG_RK3X_UART2
		default 0x20068000 if DEBUG_RK29_UART2 \|\| DEBUG_RK3X_UART3
		default 0x20201000 if DEBUG_BCM2835
		default 0x4000e400 if DEBUG_LL_UART_EFM32
		default 0x40090000 if ARCH_LPC32XX
		default 0x40100000 if DEBUG_PXA_UART1
		default 0x42000000 if ARCH_GEMINI
		@@ -981,6 +997,7 @@ config DEBUG_UART_PHYS
		default 0xfff36000 if DEBUG_HIGHBANK_UART
		default 0xfffff700 if ARCH_IOP33X
		depends on DEBUG_LL_UART_8250 \|\| DEBUG_LL_UART_PL01X \|\| \
		DEBUG_LL_UART_EFM32 \|\| \
		DEBUG_UART_8250 \|\| DEBUG_UART_PL01X

		config DEBUG_UART_VIRT

arch/arm/include/debug/efm32.S

0 → 100644

+45 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2013 Pengutronix
		* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
		*
		* 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 UARTn_CMD 0x000c
		#define UARTn_CMD_TXEN 0x0004

		#define UARTn_STATUS 0x0010
		#define UARTn_STATUS_TXC 0x0020
		#define UARTn_STATUS_TXBL 0x0040

		#define UARTn_TXDATA 0x0034

		.macro addruart, rx, tmp
		ldr \rx, =(CONFIG_DEBUG_UART_PHYS)

		/*
		* enable TX. The driver might disable it to save energy. We
		* don't care about disabling at the end as during debug power
		* consumption isn't that important.
		*/
		ldr \tmp, =(UARTn_CMD_TXEN)
		str \tmp, [\rx, #UARTn_CMD]
		.endm

		.macro senduart,rd,rx
		strb \rd, [\rx, #UARTn_TXDATA]
		.endm

		.macro waituart,rd,rx
		1001: ldr \rd, [\rx, #UARTn_STATUS]
		tst \rd, #UARTn_STATUS_TXBL
		beq 1001b
		.endm

		.macro busyuart,rd,rx
		1001: ldr \rd, [\rx, UARTn_STATUS]
		tst \rd, #UARTn_STATUS_TXC
		bne 1001b
		.endm

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