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a3ca595f1a
* clock/clock.c, include/bsp.h, startup/bspstart.c: Eliminate copies of the Configuration Table. Use the RTEMS provided accessor macros to obtain configuration fields.
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
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* Use SYS_CLK as system clock
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*
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* Copyright (c) 2005-2006 Kolja Waschk, rtemsdev/ixo.de
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*
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* $Id$
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*/
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#include <rtems.h>
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#include <bsp.h>
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#define CLOCK_REGS ((altera_avalon_timer_regs*)NIOS2_IO_BASE(CLOCK_BASE))
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/*
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* Periodic interval timer interrupt handler
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*/
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#define Clock_driver_support_at_tick() \
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do { CLOCK_REGS->status = 0; } while(0)
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/*
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* Attach clock interrupt handler
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*/
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#define Clock_driver_support_install_isr(_new, _old) \
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do { _old = (rtems_isr_entry)set_vector(_new, CLOCK_VECTOR, 1); } while(0)
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/*
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* Turn off the clock
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*/
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#define Clock_driver_support_shutdown_hardware() \
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do { CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_STOP_MSK; } while(0)
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/*
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* Set up the clock hardware
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*/
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void Clock_driver_support_initialize_hardware(void)
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{
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uint32_t period;
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CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_STOP_MSK;
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period = (CLOCK_FREQ/1000000L)*rtems_configuration_get_microseconds_per_tick() - 1;
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CLOCK_REGS->period_hi = period >> 16;
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CLOCK_REGS->period_lo = period & 0xFFFF;
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CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_ITO_MSK |
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ALTERA_AVALON_TIMER_CONTROL_CONT_MSK |
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ALTERA_AVALON_TIMER_CONTROL_START_MSK;
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NIOS2_IENABLE(1 << CLOCK_VECTOR);
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}
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#include "../../../shared/clockdrv_shell.c"
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