diff options
Diffstat (limited to 'c/src/lib/libbsp/riscv/riscv_generic/clock/clockdrv.c')
| -rw-r--r-- | c/src/lib/libbsp/riscv/riscv_generic/clock/clockdrv.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/c/src/lib/libbsp/riscv/riscv_generic/clock/clockdrv.c b/c/src/lib/libbsp/riscv/riscv_generic/clock/clockdrv.c deleted file mode 100644 index 974ada0fd3..0000000000 --- a/c/src/lib/libbsp/riscv/riscv_generic/clock/clockdrv.c +++ /dev/null @@ -1,131 +0,0 @@ -/** - * @file - * - * @ingroup bsp_clock - * - * @brief riscv clock support. - */ - -/* - * riscv_generic Clock driver - * - * COPYRIGHT (c) 2015 Hesham Alatary <hesham@alumni.york.ac.uk> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <rtems.h> -#include <bsp.h> -#include <bsp/irq.h> -#include <rtems/score/riscv-utility.h> -#include <rtems/score/cpu.h> -#include <rtems/timecounter.h> - -/* The number of clock cycles before generating a tick timer interrupt. */ -#define TTMR_NUM_OF_CLOCK_TICKS_INTERRUPT 1000 -#define RISCV_CLOCK_CYCLE_TIME_NANOSECONDS 1 - -static struct timecounter riscv_generic_tc; - -/* CPU counter */ -static CPU_Counter_ticks cpu_counter_ticks; - -/* This prototype is added here to Avoid warnings */ -void Clock_isr(void *arg); - -static void riscv_generic_clock_at_tick(void) -{ - REG(MTIME_MM) = 0; - REG(MTIMECMP_MM) = TTMR_NUM_OF_CLOCK_TICKS_INTERRUPT; - - cpu_counter_ticks += TTMR_NUM_OF_CLOCK_TICKS_INTERRUPT * 10000; -} - -static void riscv_generic_clock_handler_install(proc_ptr new_isr) -{ - rtems_status_code sc = RTEMS_SUCCESSFUL; - _CPU_ISR_install_vector(RISCV_MACHINE_TIMER_INTERRUPT, - new_isr, - NULL); - - if (sc != RTEMS_SUCCESSFUL) { - rtems_fatal_error_occurred(0xdeadbeef); - } -} - -static uint32_t riscv_generic_get_timecount(struct timecounter *tc) -{ - uint32_t ticks_since_last_timer_interrupt = REG(MTIME_MM); - - return cpu_counter_ticks + ticks_since_last_timer_interrupt; -} - -CPU_Counter_ticks _CPU_Counter_read(void) -{ - return riscv_generic_get_timecount(NULL); -} - -static void riscv_generic_clock_initialize(void) -{ - uint32_t mtimecmp = TTMR_NUM_OF_CLOCK_TICKS_INTERRUPT; - uint64_t frequency = (1000000000 / RISCV_CLOCK_CYCLE_TIME_NANOSECONDS); - - REG(MTIME_MM) = 0; - REG(MTIMECMP_MM) = TTMR_NUM_OF_CLOCK_TICKS_INTERRUPT; - - /* Enable mtimer interrupts */ - set_csr(mie, MIP_MTIP); - set_csr(mip, MIP_MTIP); - - /* Initialize timecounter */ - riscv_generic_tc.tc_get_timecount = riscv_generic_get_timecount; - riscv_generic_tc.tc_counter_mask = 0xffffffff; - riscv_generic_tc.tc_frequency = frequency; - riscv_generic_tc.tc_quality = RTEMS_TIMECOUNTER_QUALITY_CLOCK_DRIVER; - rtems_timecounter_install(&riscv_generic_tc); -} - -static void riscv_generic_clock_cleanup(void) -{ - /* Disable mtimer interrupts */ - clear_csr(mie, MIP_MTIP); - clear_csr(mip, MIP_MTIP); -} - -CPU_Counter_ticks _CPU_Counter_difference( - CPU_Counter_ticks second, - CPU_Counter_ticks first -) -{ - return second - first; -} - -#define Clock_driver_support_at_tick() riscv_generic_clock_at_tick() - -#define Clock_driver_support_initialize_hardware() riscv_generic_clock_initialize() - -#define Clock_driver_support_install_isr(isr) \ - riscv_generic_clock_handler_install(isr) - -#define Clock_driver_support_shutdown_hardware() riscv_generic_clock_cleanup() - -#include "../../../shared/clockdrv_shell.h" |