/* SPDX-License-Identifier: GPL-2.0-only *//* * Debugging macro include header * *  Copyright (C) 1994-1999 Russell King *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks*/ #include <linux/serial_reg.h> /* External port on Zoom2/3 */#define ZOOM_UART_BASE		0x10000000#define ZOOM_UART_VIRT		0xfa400000 #define OMAP_PORT_SHIFT		2#define ZOOM_PORT_SHIFT		1 #define UART_OFFSET(addr)	((addr) & 0x00ffffff) 		.pushsection .data		.align	2omap_uart_phys:	.word	0omap_uart_virt:	.word	0omap_uart_lsr:	.word	0		.popsection 		.macro	addruart, rp, rv, tmp 		/* Use omap_uart_phys/virt if already configured */10:		adr	\rp, 99f		@ get effective addr of 99f		ldr	\rv, [\rp]		@ get absolute addr of 99f		sub	\rv, \rv, \rp		@ offset between the two		ldr	\rp, [\rp, #4]		@ abs addr of omap_uart_phys		sub	\tmp, \rp, \rv		@ make it effective		ldr	\rp, [\tmp, #0]		@ omap_uart_phys		ldr	\rv, [\tmp, #4]		@ omap_uart_virt		cmp	\rp, #0			@ is port configured?		cmpne	\rv, #0		bne	100f			@ already configured 		/* Configure the UART offset from the phys/virt base */#ifdef CONFIG_DEBUG_ZOOM_UART		ldr	\rp, =ZOOM_UART_BASE		str	\rp, [\tmp, #0]		@ omap_uart_phys		ldr	\rp, =ZOOM_UART_VIRT		str	\rp, [\tmp, #4]		@ omap_uart_virt		mov	\rp, #(UART_LSR << ZOOM_PORT_SHIFT)		str	\rp, [\tmp, #8]		@ omap_uart_lsr#endif		b	10b 		.align99:		.word	.		.word	omap_uart_phys		.ltorg 100:		/* Pass the UART_LSR reg address */		ldr	\tmp, [\tmp, #8]	@ omap_uart_lsr		add	\rp, \rp, \tmp		add	\rv, \rv, \tmp		.endm 		.macro	senduart,rd,rx		orr	\rd, \rd, \rx, lsl #24	@ preserve LSR reg offset		bic	\rx, \rx, #0xff		@ get base (THR) reg address		strb	\rd, [\rx]		@ send lower byte of rd		orr	\rx, \rx, \rd, lsr #24	@ restore original rx (LSR)		bic	\rd, \rd, #(0xff << 24)	@ restore original rd		.endm 		.macro	busyuart,rd,rx1001:		ldrb	\rd, [\rx]		@ rx contains UART_LSR address		and	\rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)		teq	\rd, #(UART_LSR_TEMT | UART_LSR_THRE)		bne	1001b		.endm 		.macro	waituart,rd,rx		.endm