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/sn/addrs.h> 11 #include <asm/sn/sn0/hub.h> 12 #include <asm/sn/klconfig.h> 13 #include <asm/sn/ioc3.h> 14 #include <asm/sn/sn_private.h> 15 16 #include <linux/serial.h> 17 #include <linux/serial_core.h> 18 19 #define IOC3_CLK (22000000 / 3) 20 #define IOC3_FLAGS (0) 21 22 static inline struct ioc3_uartregs *console_uart(void) 23 { 24 struct ioc3 *ioc3; 25 nasid_t nasid; 26 27 nasid = (master_nasid == INVALID_NASID) ? get_nasid() : master_nasid; 28 ioc3 = (struct ioc3 *)KL_CONFIG_CH_CONS_INFO(nasid)->memory_base; 29 30 return &ioc3->sregs.uarta; 31 } 32 33 void prom_putchar(char c) 34 { 35 struct ioc3_uartregs *uart = console_uart(); 36 37 while ((uart->iu_lsr & 0x20) == 0); 38 uart->iu_thr = c; 39 } 40