1 /* 2 * (C) Copyright 2007 Michal Simek 3 * 4 * Michal SIMEK <monstr@monstr.eu> 5 * 6 * See file CREDITS for list of people who contributed to this 7 * project. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation; either version 2 of 12 * the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 22 * MA 02111-1307 USA 23 */ 24 25 #include <common.h> 26 #include <asm/microblaze_timer.h> 27 #include <asm/microblaze_intc.h> 28 29 volatile int timestamp = 0; 30 31 void reset_timer (void) 32 { 33 timestamp = 0; 34 } 35 36 #ifdef CONFIG_SYS_TIMER_0 37 ulong get_timer (ulong base) 38 { 39 return (timestamp - base); 40 } 41 #else 42 ulong get_timer (ulong base) 43 { 44 return (timestamp++ - base); 45 } 46 #endif 47 48 void set_timer (ulong t) 49 { 50 timestamp = t; 51 } 52 53 #ifdef CONFIG_SYS_INTC_0 54 #ifdef CONFIG_SYS_TIMER_0 55 microblaze_timer_t *tmr = (microblaze_timer_t *) (CONFIG_SYS_TIMER_0_ADDR); 56 57 void timer_isr (void *arg) 58 { 59 timestamp++; 60 tmr->control = tmr->control | TIMER_INTERRUPT; 61 } 62 63 int timer_init (void) 64 { 65 tmr->loadreg = CONFIG_SYS_TIMER_0_PRELOAD; 66 tmr->control = TIMER_INTERRUPT | TIMER_RESET; 67 tmr->control = 68 TIMER_ENABLE | TIMER_ENABLE_INTR | TIMER_RELOAD | TIMER_DOWN_COUNT; 69 reset_timer (); 70 install_interrupt_handler (CONFIG_SYS_TIMER_0_IRQ, timer_isr, (void *)tmr); 71 return 0; 72 } 73 #endif 74 #endif 75