diff options
Diffstat (limited to 'libgloss/or1k/timer.c')
| -rw-r--r-- | libgloss/or1k/timer.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/libgloss/or1k/timer.c b/libgloss/or1k/timer.c deleted file mode 100644 index 27a24a1c1..000000000 --- a/libgloss/or1k/timer.c +++ /dev/null @@ -1,186 +0,0 @@ -/* timer.c -- tick timer functions for OpenRISC 1000. - * - * Copyright (c) 2011, 2014 Authors - * - * Contributor Julius Baxter <juliusbaxter@gmail.com> - * Contributor Stefan Wallentowitz <stefan.wallentowitz@tum.de> - * - * The authors hereby grant permission to use, copy, modify, distribute, - * and license this software and its documentation for any purpose, provided - * that existing copyright notices are retained in all copies and that this - * notice is included verbatim in any distributions. No written agreement, - * license, or royalty fee is required for any of the authorized uses. - * Modifications to this software may be copyrighted by their authors - * and need not follow the licensing terms described here, provided that - * the new terms are clearly indicated on the first page of each file where - * they apply. - */ - -#include "include/or1k-support.h" -#include "include/or1k-sprs.h" - -#include "or1k-internals.h" -#include "board.h" - -/* --------------------------------------------------------------------------*/ -/*!Tick timer interrupt handler - - Increment timer ticks counter, reload TTMR - */ -/* --------------------------------------------------------------------------*/ -void -_or1k_timer_interrupt_handler(void) -{ - OR1K_REENT.or1k_timer_ticks++; - uint32_t ttmr = or1k_mfspr(OR1K_SPR_TICK_TTMR_ADDR); - ttmr = OR1K_SPR_TICK_TTMR_IE_SET(ttmr, 1); - ttmr = OR1K_SPR_TICK_TTMR_MODE_SET(ttmr, OR1K_SPR_TICK_TTMR_MODE_RESTART); - ttmr = OR1K_SPR_TICK_TTMR_IE_SET(ttmr, 1); - or1k_mtspr(OR1K_SPR_TICK_TTMR_ADDR, ttmr); -} - -/* --------------------------------------------------------------------------*/ -/*!Enable tick timer - - Install handler, calculate TTMR period, reset tick counter - - @param[in] hz Rate at which to trigger timer ticks */ -/* --------------------------------------------------------------------------*/ -int -or1k_timer_init(unsigned int hz) -{ - uint32_t upr = or1k_mfspr(OR1K_SPR_SYS_UPR_ADDR); - if (OR1K_SPR_SYS_UPR_TTP_GET(upr) == 0) { - return -1; - } - - /* Set this, for easy access when reloading */ - uint32_t period = (_or1k_board_clk_freq/hz) & OR1K_SPR_TICK_TTMR_TP_MASK; - OR1K_REENT.or1k_timer_period = period; - or1k_mtspr(OR1K_SPR_TICK_TTMR_ADDR, period); - - /* Reset timer tick counter */ - OR1K_REENT.or1k_timer_ticks = 0; - - /* Install handler */ - or1k_exception_handler_add(0x5, _or1k_timer_interrupt_handler); - OR1K_REENT.or1k_timer_mode = OR1K_SPR_TICK_TTMR_MODE_RESTART; - - /* Reset counter register */ - or1k_mtspr(OR1K_SPR_TICK_TTCR_ADDR, 0); - - return 0; -} - -void -or1k_timer_set_period(uint32_t hz) -{ - uint32_t period = (_or1k_board_clk_freq/hz) & OR1K_SPR_TICK_TTMR_TP_MASK; - uint32_t ttmr = or1k_mfspr(OR1K_SPR_TICK_TTMR_ADDR); - ttmr = OR1K_SPR_TICK_TTMR_TP_SET(ttmr, period); - or1k_mtspr(OR1K_SPR_TICK_TTMR_ADDR, ttmr); - OR1K_REENT.or1k_timer_period = period; -} - -void -or1k_timer_set_handler(void (*handler)(void)) -{ - or1k_exception_handler_add(0x5, handler); -} - -void -or1k_timer_set_mode(uint32_t mode) -{ - // Store mode in variable - OR1K_REENT.or1k_timer_mode = mode; - - uint32_t ttmr = or1k_mfspr(OR1K_SPR_TICK_TTMR_ADDR); - // If the timer is currently running, we also change the mode - if (OR1K_SPR_TICK_TTMR_MODE_GET(ttmr) != 0) { - ttmr = OR1K_SPR_TICK_TTMR_MODE_SET(ttmr, mode); - or1k_mtspr(OR1K_SPR_TICK_TTMR_ADDR, ttmr); - } -} - -/* --------------------------------------------------------------------------*/ -/*!Enable tick timer - - Enable timer interrupt, install handler, load TTMR - */ -/* --------------------------------------------------------------------------*/ -void -or1k_timer_enable(void) -{ - uint32_t ttmr = or1k_mfspr(OR1K_SPR_TICK_TTMR_ADDR); - ttmr = OR1K_SPR_TICK_TTMR_IE_SET(ttmr, 1); - ttmr = OR1K_SPR_TICK_TTMR_MODE_SET(ttmr, OR1K_REENT.or1k_timer_mode); - or1k_mtspr(OR1K_SPR_TICK_TTMR_ADDR, ttmr); - - uint32_t sr = or1k_mfspr(OR1K_SPR_SYS_SR_ADDR); - sr = OR1K_SPR_SYS_SR_TEE_SET(sr, 1); - or1k_mtspr(OR1K_SPR_SYS_SR_ADDR, sr); -} - -/* --------------------------------------------------------------------------*/ -/*!Disable tick timer - - Disable timer interrupt in SR - */ -/* --------------------------------------------------------------------------*/ -uint32_t -or1k_timer_disable(void) -{ - uint32_t oldsr = or1k_mfspr(OR1K_SPR_SYS_SR_ADDR); - uint32_t sr = OR1K_SPR_SYS_SR_TEE_SET(oldsr, 0); - or1k_mtspr(OR1K_SPR_SYS_SR_ADDR, sr); - return OR1K_SPR_SYS_SR_TEE_GET(oldsr); -} - -void -or1k_timer_restore(uint32_t sr_tee) -{ - uint32_t sr = or1k_mfspr(OR1K_SPR_SYS_SR_ADDR); - sr = OR1K_SPR_SYS_SR_TEE_SET(sr, 1); - or1k_mtspr(OR1K_SPR_SYS_SR_ADDR, sr); -} - -void -or1k_timer_pause(void) -{ - uint32_t ttmr = or1k_mfspr(OR1K_SPR_TICK_TTMR_ADDR); - ttmr = OR1K_SPR_TICK_TTMR_MODE_SET(ttmr, OR1K_SPR_TICK_TTMR_MODE_DISABLE); - or1k_mtspr(OR1K_SPR_TICK_TTMR_ADDR, ttmr); -} - -void -or1k_timer_reset(void) -{ - uint32_t ttmr = or1k_mfspr(OR1K_SPR_TICK_TTMR_ADDR); - ttmr = OR1K_SPR_TICK_TTMR_IP_SET(ttmr, 0); - or1k_mtspr(OR1K_SPR_TICK_TTMR_ADDR, ttmr); - or1k_mtspr(OR1K_SPR_TICK_TTCR_ADDR, 0); -} - -/* --------------------------------------------------------------------------*/ -/*!Get tick timer - - Return value of tick timer - */ -/* --------------------------------------------------------------------------*/ -unsigned long -or1k_timer_get_ticks(void) -{ - return OR1K_REENT.or1k_timer_ticks; -} - -/* --------------------------------------------------------------------------*/ -/*!Reset tick timer - - Clear value of tick timer - */ -/* --------------------------------------------------------------------------*/ -void -or1k_timer_reset_ticks(void) -{ - OR1K_REENT.or1k_timer_ticks = 0; -} |