diff options
author | Ning Yang <yangn0@qq.com> | 2024-04-10 14:05:03 +0800 |
---|---|---|
committer | Joel Sherrill <joel@rtems.org> | 2024-04-11 10:24:00 -0500 |
commit | 4814f82ba48023308b64d20c759589fbf91fdb83 (patch) | |
tree | 2c5aa4228a3cf034bab458f0b6ec8d0fe2d939d9 /bsps/arm/raspberrypi | |
parent | bsps/xil-ttc: Improve clock driver (diff) | |
download | rtems-4814f82ba48023308b64d20c759589fbf91fdb83.tar.bz2 |
dev/clock: Move bcm2835-system-timer driver to shared space
This patch moves the bcm2835 system timer driver in the arm/raspberrypi directory to the shared directory and adjusts arm/raspberrypi BSP.
Diffstat (limited to 'bsps/arm/raspberrypi')
-rw-r--r-- | bsps/arm/raspberrypi/clock/clockdrv.c | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/bsps/arm/raspberrypi/clock/clockdrv.c b/bsps/arm/raspberrypi/clock/clockdrv.c deleted file mode 100644 index bb8490d03a..0000000000 --- a/bsps/arm/raspberrypi/clock/clockdrv.c +++ /dev/null @@ -1,94 +0,0 @@ -/** - * @file - * - * @ingroup RTEMSDriverClockImpl - * - * @brief This source file contains the implementation of the BCM2835 Clock - * Driver. - */ - -/* - * Copyright (c) 2013 Alan Cudmore - * Copyright (c) 2016 Pavel Pisa - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * - * http://www.rtems.org/license/LICENSE - * -*/ - -#include <rtems.h> -#include <bsp.h> -#include <bsp/irq.h> -#include <bsp/irq-generic.h> -#include <bsp/raspberrypi.h> -#include <rtems/timecounter.h> - -static struct timecounter raspberrypi_tc; - -static uint32_t raspberrypi_clock_get_timecount(struct timecounter *tc) -{ - return BCM2835_REG(BCM2835_GPU_TIMER_CLO); -} - -static void raspberrypi_clock_at_tick(void) -{ - uint32_t act_val; - uint32_t next_cmp = BCM2835_REG(BCM2835_GPU_TIMER_C3); - next_cmp += rtems_configuration_get_microseconds_per_tick(); - BCM2835_REG(BCM2835_GPU_TIMER_C3) = next_cmp; - act_val = BCM2835_REG(BCM2835_GPU_TIMER_CLO); - - /* - * Clear interrupt only if there is time left to the next tick. - * If time of the next tick has already passed then interrupt - * request stays active and fires immediately after current tick - * processing is finished. - */ - if ((int32_t)(next_cmp - act_val) > 0) - BCM2835_REG(BCM2835_GPU_TIMER_CS) = BCM2835_GPU_TIMER_CS_M3; -} - -static void raspberrypi_clock_handler_install_isr( - rtems_interrupt_handler clock_isr -) -{ - rtems_status_code sc = RTEMS_SUCCESSFUL; - - sc = rtems_interrupt_handler_install( - BCM2835_IRQ_ID_GPU_TIMER_M3, - "Clock", - RTEMS_INTERRUPT_UNIQUE, - clock_isr, - NULL - ); - if ( sc != RTEMS_SUCCESSFUL ) { - rtems_fatal_error_occurred(0xdeadbeef); - } -} - -static void raspberrypi_clock_initialize_hardware(void) -{ - uint32_t next_cmp = BCM2835_REG(BCM2835_GPU_TIMER_CLO); - next_cmp += rtems_configuration_get_microseconds_per_tick(); - BCM2835_REG(BCM2835_GPU_TIMER_C3) = next_cmp; - BCM2835_REG(BCM2835_GPU_TIMER_CS) = BCM2835_GPU_TIMER_CS_M3; - - raspberrypi_tc.tc_get_timecount = raspberrypi_clock_get_timecount; - raspberrypi_tc.tc_counter_mask = 0xffffffff; - raspberrypi_tc.tc_frequency = 1000000; /* 1 MHz */ - raspberrypi_tc.tc_quality = RTEMS_TIMECOUNTER_QUALITY_CLOCK_DRIVER; - rtems_timecounter_install(&raspberrypi_tc); -} - -#define Clock_driver_support_at_tick(arg) raspberrypi_clock_at_tick() - -#define Clock_driver_support_initialize_hardware() raspberrypi_clock_initialize_hardware() - -#define Clock_driver_support_install_isr(clock_isr) \ - raspberrypi_clock_handler_install_isr(clock_isr) - -#define CLOCK_DRIVER_USE_ONLY_BOOT_PROCESSOR 1 - -#include "../../../shared/dev/clock/clockimpl.h" |