1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2001, 2002 Ralf Baechle 7 */ 8 9 #include <asm/page.h> 10 #include <asm/setup.h> 11 #include <asm/sn/addrs.h> 12 #include <asm/sn/sn0/hub.h> 13 #include <asm/sn/klconfig.h> 14 #include <asm/sn/ioc3.h> 15 #include <asm/sn/sn_private.h> 16 17 #include <linux/serial.h> 18 #include <linux/serial_core.h> 19 20 #define IOC3_CLK (22000000 / 3) 21 #define IOC3_FLAGS (0) 22 23 static inline struct ioc3_uartregs *console_uart(void) 24 { 25 struct ioc3 *ioc3; 26 nasid_t nasid; 27 28 nasid = (master_nasid == INVALID_NASID) ? get_nasid() : master_nasid; 29 ioc3 = (struct ioc3 *)KL_CONFIG_CH_CONS_INFO(nasid)->memory_base; 30 31 return &ioc3->sregs.uarta; 32 } 33 34 void prom_putchar(char c) 35 { 36 struct ioc3_uartregs *uart = console_uart(); 37 38 while ((readb(&uart->iu_lsr) & 0x20) == 0) 39 ; 40 writeb(c, &uart->iu_thr); 41 } 42