| /****************************************************************************** |
| * * |
| * License Agreement * |
| * * |
| * Copyright (c) 2003 Altera Corporation, San Jose, California, USA. * |
| * All rights reserved. * |
| * * |
| * Permission is hereby granted, free of charge, to any person obtaining a * |
| * copy of this software and associated documentation files (the "Software"), * |
| * to deal in the Software without restriction, including without limitation * |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, * |
| * and/or sell copies of the Software, and to permit persons to whom the * |
| * Software is furnished to do so, subject to the following conditions: * |
| * * |
| * The above copyright notice and this permission notice shall be included in * |
| * all copies or substantial portions of the Software. * |
| * * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * |
| * DEALINGS IN THE SOFTWARE. * |
| * * |
| * * |
| * Altera does not recommend, suggest or require that this reference design * |
| * file be used in conjunction or combination with any other product. * |
| ******************************************************************************/ |
| |
| #include <string.h> |
| |
| #include "system.h" |
| #include "sys/alt_timestamp.h" |
| |
| #include "altera_avalon_timer.h" |
| #include "altera_avalon_timer_regs.h" |
| |
| #include "alt_types.h" |
| |
| /* |
| * These functions are only available if a timestamp device has been selected |
| * for this system. |
| */ |
| |
| #if (ALT_TIMESTAMP_CLK_BASE != none_BASE) |
| |
| /* |
| * The function alt_timestamp_start() can be called at application level to |
| * initialise the timestamp facility. In this case the period register is |
| * set to full scale, i.e. 0xffffffff, and then started running. Note that |
| * the period register may not be writable, depending on the hardware |
| * configuration, in which case this function does not reset the period. |
| * |
| * The timer is not run in continuous mode, so that the user can detect timer |
| * roll-over, i.e. alt_timestamp() returns 0. |
| * |
| * The return value of this function is 0 upon sucess and -1 if in timestamp |
| * device has not been registered. |
| */ |
| |
| int alt_timestamp_start(void) |
| { |
| void* base = altera_avalon_timer_ts_base; |
| |
| if (!altera_avalon_timer_ts_freq) |
| { |
| return -1; |
| } |
| else |
| { |
| if(ALT_TIMESTAMP_COUNTER_SIZE == 64) { |
| IOWR_ALTERA_AVALON_TIMER_CONTROL (base,ALTERA_AVALON_TIMER_CONTROL_STOP_MSK); |
| IOWR_ALTERA_AVALON_TIMER_PERIOD_0 (base, 0xFFFF); |
| IOWR_ALTERA_AVALON_TIMER_PERIOD_1 (base, 0xFFFF);; |
| IOWR_ALTERA_AVALON_TIMER_PERIOD_2 (base, 0xFFFF); |
| IOWR_ALTERA_AVALON_TIMER_PERIOD_3 (base, 0xFFFF); |
| IOWR_ALTERA_AVALON_TIMER_CONTROL (base, ALTERA_AVALON_TIMER_CONTROL_START_MSK); |
| } else { |
| IOWR_ALTERA_AVALON_TIMER_CONTROL (base,ALTERA_AVALON_TIMER_CONTROL_STOP_MSK); |
| IOWR_ALTERA_AVALON_TIMER_PERIODL (base, 0xFFFF); |
| IOWR_ALTERA_AVALON_TIMER_PERIODH (base, 0xFFFF); |
| IOWR_ALTERA_AVALON_TIMER_CONTROL (base, ALTERA_AVALON_TIMER_CONTROL_START_MSK); |
| } |
| } |
| return 0; |
| } |
| |
| /* |
| * alt_timestamp() returns the current timestamp count. In the event that |
| * the timer has run full period, or there is no timestamp available, this |
| * function return -1. |
| * |
| * The returned timestamp counts up from the last time the period register |
| * was reset. |
| */ |
| |
| alt_timestamp_type alt_timestamp(void) |
| { |
| |
| void* base = altera_avalon_timer_ts_base; |
| |
| if (!altera_avalon_timer_ts_freq) |
| { |
| #if (ALT_TIMESTAMP_COUNTER_SIZE == 64) |
| return 0xFFFFFFFFFFFFFFFFULL; |
| #else |
| return 0xFFFFFFFF; |
| #endif |
| } |
| else |
| { |
| #if (ALT_TIMESTAMP_COUNTER_SIZE == 64) |
| IOWR_ALTERA_AVALON_TIMER_SNAP_0 (base, 0); |
| alt_timestamp_type snap_0 = IORD_ALTERA_AVALON_TIMER_SNAP_0(base) & ALTERA_AVALON_TIMER_SNAP_0_MSK; |
| alt_timestamp_type snap_1 = IORD_ALTERA_AVALON_TIMER_SNAP_1(base) & ALTERA_AVALON_TIMER_SNAP_1_MSK; |
| alt_timestamp_type snap_2 = IORD_ALTERA_AVALON_TIMER_SNAP_2(base) & ALTERA_AVALON_TIMER_SNAP_2_MSK; |
| alt_timestamp_type snap_3 = IORD_ALTERA_AVALON_TIMER_SNAP_3(base) & ALTERA_AVALON_TIMER_SNAP_3_MSK; |
| |
| return (0xFFFFFFFFFFFFFFFFULL - ( (snap_3 << 48) | (snap_2 << 32) | (snap_1 << 16) | (snap_0) )); |
| #else |
| IOWR_ALTERA_AVALON_TIMER_SNAPL (base, 0); |
| alt_timestamp_type lower = IORD_ALTERA_AVALON_TIMER_SNAPL(base) & ALTERA_AVALON_TIMER_SNAPL_MSK; |
| alt_timestamp_type upper = IORD_ALTERA_AVALON_TIMER_SNAPH(base) & ALTERA_AVALON_TIMER_SNAPH_MSK; |
| |
| return (0xFFFFFFFF - ((upper << 16) | lower)); |
| #endif |
| } |
| } |
| |
| /* |
| * Return the number of timestamp ticks per second. This will be 0 if no |
| * timestamp device has been registered. |
| */ |
| |
| alt_u32 alt_timestamp_freq(void) |
| { |
| return altera_avalon_timer_ts_freq; |
| } |
| |
| #endif /* timestamp available */ |