MIPS: Loongson2ef: Convert to early_printk_8250 (574b9a04) · Commits · 戴 / test

arch/mips/include/asm/mach-loongson2ef/loongson.h

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		@@ -21,7 +21,6 @@ extern void mach_prepare_shutdown(void);
		/* environment arguments from bootloader */
		extern u32 cpu_clock_freq;
		extern u32 memsize, highmemsize;
		extern const struct plat_smp_ops loongson3_smp_ops;

		/* loongson-specific command line, env and memory initialization */
		extern void __init prom_init_memory(void);

+2 −0

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		@@ -23,6 +23,7 @@ config LEMOTE_FULOONG2E
		select SYS_SUPPORTS_LITTLE_ENDIAN
		select SYS_SUPPORTS_HIGHMEM
		select SYS_HAS_EARLY_PRINTK
		select USE_GENERIC_EARLY_PRINTK_8250
		select GENERIC_ISA_DMA_SUPPORT_BROKEN
		select CPU_HAS_WB
		select LOONGSON_MC146818
		@@ -52,6 +53,7 @@ config LEMOTE_MACH2F
		select ISA
		select SYS_HAS_CPU_LOONGSON2F
		select SYS_HAS_EARLY_PRINTK
		select USE_GENERIC_EARLY_PRINTK_8250
		select SYS_SUPPORTS_64BIT_KERNEL
		select SYS_SUPPORTS_HIGHMEM
		select SYS_SUPPORTS_LITTLE_ENDIAN

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		@@ -10,7 +10,6 @@ obj-$(CONFIG_PCI) += pci.o
		#
		# Serial port support
		#
		obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
		obj-$(CONFIG_LOONGSON_UART_BASE) += uart_base.o
		obj-$(CONFIG_LOONGSON_MC146818) += rtc.o

deleted100644 → 0

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		// SPDX-License-Identifier: GPL-2.0-or-later
		/* early printk support
		*
		* Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
		* Copyright (c) 2009 Lemote Inc.
		* Author: Wu Zhangjin, wuzhangjin@gmail.com
		*/
		#include <linux/serial_reg.h>
		#include <asm/setup.h>

		#include <loongson.h>

		#define PORT(base, offset) (u8 *)(base + offset)

		static inline unsigned int serial_in(unsigned char *base, int offset)
		{
		return readb(PORT(base, offset));
		}

		static inline void serial_out(unsigned char *base, int offset, int value)
		{
		writeb(value, PORT(base, offset));
		}

		void prom_putchar(char c)
		{
		int timeout;
		unsigned char *uart_base;

		uart_base = (unsigned char *)_loongson_uart_base;
		timeout = 1024;

		while (((serial_in(uart_base, UART_LSR) & UART_LSR_THRE) == 0) &&
		(timeout-- > 0))
		;

		serial_out(uart_base, UART_TX, c);
		}

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		@@ -44,7 +44,6 @@ void __init prom_init(void)

		/init the uart base address /
		prom_init_uart_base();
		register_smp_ops(&loongson3_smp_ops);
		board_nmi_handler_setup = mips_nmi_setup;
		}