diff options
Diffstat (limited to 'target/linux/adm5120/files-3.18/arch/mips/adm5120/common/early-printk.c')
| -rw-r--r-- | target/linux/adm5120/files-3.18/arch/mips/adm5120/common/early-printk.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target/linux/adm5120/files-3.18/arch/mips/adm5120/common/early-printk.c b/target/linux/adm5120/files-3.18/arch/mips/adm5120/common/early-printk.c new file mode 100644 index 0000000..d900712 --- /dev/null +++ b/target/linux/adm5120/files-3.18/arch/mips/adm5120/common/early-printk.c @@ -0,0 +1,31 @@ +/* + * ADM5120 specific early printk support + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * 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. + * + */ + +#include <linux/init.h> +#include <linux/io.h> + +#include <asm/addrspace.h> +#include <asm/mach-adm5120/adm5120_defs.h> +#include <asm/mach-adm5120/adm5120_uart.h> + +#define UART_READ(r) \ + __raw_readl((void __iomem *)(KSEG1ADDR(ADM5120_UART0_BASE)+(r))) +#define UART_WRITE(r, v) \ + __raw_writel((v), (void __iomem *)(KSEG1ADDR(ADM5120_UART0_BASE)+(r))) + +void __init prom_putchar(char ch) +{ + while ((UART_READ(UART_REG_FLAG) & UART_FLAG_TXFE) == 0) + ; + UART_WRITE(UART_REG_DATA, ch); + while ((UART_READ(UART_REG_FLAG) & UART_FLAG_TXFE) == 0) + ; +} |