/* SPDX-License-Identifier: GPL-2.0-only */ /* * arch/arm/mach-netx/include/mach/uncompress.h * * Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix */ /* * The following code assumes the serial port has already been * initialized by the bootloader. We search for the first enabled * port in the most probable order. If you didn't setup a port in * your bootloader then nothing will appear (which might be desired). * * This does not append a newline */ #define REG(x) (*(volatile unsigned long *)(x)) #define UART1_BASE 0x100a00 #define UART2_BASE 0x100a80 #define UART_DR 0x0 #define UART_CR 0x14 #define CR_UART_EN (1<<0) #define UART_FR 0x18 #define FR_BUSY (1<<3) #define FR_TXFF (1<<5) static inline void putc(char c) { unsigned long base; if (REG(UART1_BASE + UART_CR) & CR_UART_EN) base = UART1_BASE; else if (REG(UART2_BASE + UART_CR) & CR_UART_EN) base = UART2_BASE; else return; while (REG(base + UART_FR) & FR_TXFF); REG(base + UART_DR) = c; } static inline void flush(void) { unsigned long base; if (REG(UART1_BASE + UART_CR) & CR_UART_EN) base = UART1_BASE; else if (REG(UART2_BASE + UART_CR) & CR_UART_EN) base = UART2_BASE; else return; while (REG(base + UART_FR) & FR_BUSY); } /* * nothing to do */ #define arch_decomp_setup()