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Diffstat (limited to 'platform/zynq/timer.c')
-rw-r--r-- | platform/zynq/timer.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/platform/zynq/timer.c b/platform/zynq/timer.c deleted file mode 100644 index 17c1359f..00000000 --- a/platform/zynq/timer.c +++ /dev/null @@ -1,132 +0,0 @@ -/* - * Copyright (c) 2014 Travis Geiselbrecht - * - * 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. - */ -#include <debug.h> -#include <sys/types.h> -#include <err.h> -#include <stdio.h> -#include <assert.h> -#include <trace.h> -#include <kernel/thread.h> -#include <platform.h> -#include <platform/interrupts.h> -#include <platform/timer.h> -#include <platform/zynq.h> -#include "platform_p.h" - -/* unused, arm_cortex_a9_timer does timer duty */ - -#if 0 -/* driver for Cadence triple timer counter (TTC) */ - -#define LOCAL_TRACE 0 - -#define TIMREG(reg) (*REG32(TTC0_BASE + (reg))) -#define TIMREG16(reg) (*REG16(TTC0_BASE + (reg))) -#define TIMREG8(reg) (*REG8(TTC0_BASE + (reg))) - -#define CLK_CTRL(n) (0x00 + (n) * 4) -#define CNT_CTRL(n) (0x0c + (n) * 4) -#define CNT_VAL(n) (0x18 + (n) * 4) -#define INTERVAL_VAL(n) (0x24 + (n) * 4) -#define MATCH_1(n) (0x30 + (n) * 4) -#define MATCH_2(n) (0x3c + (n) * 4) -#define MATCH_3(n) (0x48 + (n) * 4) -#define ISR(n) (0x54 + (n) * 4) -#define IEN(n) (0x60 + (n) * 4) -#define EVT_CTRL(n) (0x6c + (n) * 4) -#define EVT(n) (0x78 + (n) * 4) - -static platform_timer_callback t_callback; - -static volatile uint ticks = 0; -static lk_time_t periodic_interval; - -status_t platform_set_periodic_timer(platform_timer_callback callback, void *arg, lk_time_t interval) -{ - enter_critical_section(); - - LTRACEF("callback %p, arg %p, interval %lu\n", callback, arg, interval); - - t_callback = callback; - - periodic_interval = interval; - - uint32_t ticks = periodic_interval * 1000; /* timer is running close to 1Mhz */ - ASSERT(ticks <= 0xffff); - - TIMREG(IEN(0)) = (1<<0); // interval interrupt - TIMREG(INTERVAL_VAL(0)) = ticks; - TIMREG(CNT_CTRL(0)) = (1<<5) | (1<<4) | (1<<1); // no wave, reset, interval mode - - unmask_interrupt(TTC0_A_INT); - - exit_critical_section(); - - return NO_ERROR; -} - -lk_bigtime_t current_time_hires(void) -{ - lk_bigtime_t time; - - time = ticks * periodic_interval * 1000ULL; - - return time; -} - -lk_time_t current_time(void) -{ - lk_time_t time; - - time = ticks * periodic_interval; - - return time; -} - -static enum handler_return platform_tick(void *arg) -{ - ticks++; - - volatile uint32_t hole = TIMREG(ISR(0)); // ack the irq - - if (t_callback) { - return t_callback(arg, current_time()); - } else { - return INT_NO_RESCHEDULE; - } -} - -void platform_init_timer(void) -{ - /* disable timers */ - TIMREG(CNT_CTRL(0)) = 0x1; - TIMREG(CNT_CTRL(1)) = 0x1; - TIMREG(CNT_CTRL(2)) = 0x1; - - TIMREG(CLK_CTRL(0)) = (6 << 1) | 1; // prescale 133Mhz/(2^7) == 1039062Hz (close to 1Mhz) - - register_int_handler(TTC0_A_INT, &platform_tick, NULL); - register_int_handler(TTC0_B_INT, &platform_tick, NULL); - register_int_handler(TTC0_C_INT, &platform_tick, NULL); -} -#endif |