u-boot/arch/arm/include/debug/8250.S

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * arch/arm/include/debug/8250.S
 *
 *  Copyright (C) 1994-2013 Russell King
 */
#include <linux/serial_reg.h>

		.macro	addruart, rp, rv, tmp
		ldr	\rp, =CONFIG_DEBUG_UART_PHYS
		ldr	\rv, =CONFIG_DEBUG_UART_VIRT
		.endm

#ifdef CONFIG_DEBUG_UART_8250_WORD
		.macro	store, rd, rx:vararg
		str	\rd, \rx
		.endm

		.macro	load, rd, rx:vararg
		ldr	\rd, \rx
		.endm
#else
		.macro	store, rd, rx:vararg
		strb	\rd, \rx
		.endm

		.macro	load, rd, rx:vararg
		ldrb	\rd, \rx
		.endm
#endif

#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT

		.macro	senduart,rd,rx
		store	\rd, [\rx, #UART_TX << UART_SHIFT]
		.endm

		.macro	busyuart,rd,rx
1002:		load	\rd, [\rx, #UART_LSR << UART_SHIFT]
		and	\rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
		teq	\rd, #UART_LSR_TEMT | UART_LSR_THRE
		bne	1002b
		.endm

		.macro	waituart,rd,rx
#ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL
1001:		load	\rd, [\rx, #UART_MSR << UART_SHIFT]
		tst	\rd, #UART_MSR_CTS
		beq	1001b
#endif
		.endm
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-06 21:58:06 +00:00			`/* SPDX-License-Identifier: GPL-2.0+ */`
arm: debug: import debug files from Linux 3.16 U-Boot does not have arch/arm/kernel, include/uapi directories, This commit copies files as follows: Location in Linux -> Location in U-Boot arch/arm/kernel/debug.S -> arch/arm/lib/debug.S arch/arm/include/debug/8250.S -> arch/arm/include/debug/8250.S include/uapi/linux/serial_reg.h -> include/linux/serial_reg.h Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> 2014-09-01 02:06:32 +00:00			`/*`
			`* arch/arm/include/debug/8250.S`
			`*`
			`* Copyright (C) 1994-2013 Russell King`
			`*/`
			`#include <linux/serial_reg.h>`

			`.macro addruart, rp, rv, tmp`
			`ldr \rp, =CONFIG_DEBUG_UART_PHYS`
			`ldr \rv, =CONFIG_DEBUG_UART_VIRT`
			`.endm`

			`#ifdef CONFIG_DEBUG_UART_8250_WORD`
			`.macro store, rd, rx:vararg`
			`str \rd, \rx`
			`.endm`

			`.macro load, rd, rx:vararg`
			`ldr \rd, \rx`
			`.endm`
			`#else`
			`.macro store, rd, rx:vararg`
			`strb \rd, \rx`
			`.endm`

			`.macro load, rd, rx:vararg`
			`ldrb \rd, \rx`
			`.endm`
			`#endif`

			`#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT`

			`.macro senduart,rd,rx`
			`store \rd, [\rx, #UART_TX << UART_SHIFT]`
			`.endm`

			`.macro busyuart,rd,rx`
			`1002: load \rd, [\rx, #UART_LSR << UART_SHIFT]`
			`and \rd, \rd, #UART_LSR_TEMT \| UART_LSR_THRE`
			`teq \rd, #UART_LSR_TEMT \| UART_LSR_THRE`
			`bne 1002b`
			`.endm`

			`.macro waituart,rd,rx`
			`#ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL`
			`1001: load \rd, [\rx, #UART_MSR << UART_SHIFT]`
			`tst \rd, #UART_MSR_CTS`
			`beq 1001b`
			`#endif`
			`.endm`