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Rev 1787 Rev 2015
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#include <adt/list.h>
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#include <adt/list.h>
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#include <atomic.h>
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#include <atomic.h>
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#include <proc/thread.h>
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#include <proc/thread.h>
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#include <sysinfo/sysinfo.h>
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#include <sysinfo/sysinfo.h>
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#include <arch/barrier.h>
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#include <arch/barrier.h>
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#include <mm/frame.h>
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#include <ddi/ddi.h>
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/** Physical memory area of the real time clock. */
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static parea_t clock_parea;
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/* Pointers to public variables with time */
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/* Pointers to public variables with time */
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struct ptime {
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struct ptime {
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    unative_t seconds1;
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    unative_t seconds1;
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    unative_t useconds;
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    unative_t useconds;
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/** Initialize realtime clock counter
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/** Initialize realtime clock counter
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 *
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 *
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 * The applications (and sometimes kernel) need to access accurate
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 * The applications (and sometimes kernel) need to access accurate
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 * information about realtime data. We allocate 1 page with these
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 * information about realtime data. We allocate 1 page with these
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 * data and update it periodically.
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 * data and update it periodically.
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 *
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 *
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 */
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 */
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void clock_counter_init(void)
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void clock_counter_init(void)
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{
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{
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    void *faddr;
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    void *faddr;
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    faddr = frame_alloc(0, FRAME_ATOMIC);
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    faddr = frame_alloc(ONE_FRAME, FRAME_ATOMIC);
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    if (!faddr)
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    if (!faddr)
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        panic("Cannot allocate page for clock");
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        panic("Cannot allocate page for clock");
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    public_time = (struct ptime *)PA2KA(faddr);
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    public_time = (struct ptime *) PA2KA(faddr);
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        /* TODO: We would need some arch dependent settings here */
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        /* TODO: We would need some arch dependent settings here */
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    public_time->seconds1 = 0;
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    public_time->seconds1 = 0;
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    public_time->seconds2 = 0;
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    public_time->seconds2 = 0;
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    public_time->useconds = 0;
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    public_time->useconds = 0;
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    clock_parea.pbase = (uintptr_t) faddr;
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    clock_parea.vbase = (uintptr_t) public_time;
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    clock_parea.frames = 1;
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    clock_parea.cacheable = true;
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    ddi_parea_register(&clock_parea);
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    /*
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     * Prepare information for the userspace so that it can successfully
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     * physmem_map() the clock_parea.
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     */
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    sysinfo_set_item_val("clock.cacheable", NULL, (unative_t) true);
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    sysinfo_set_item_val("clock.fcolor", NULL, (unative_t)
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        PAGE_COLOR(clock_parea.vbase));
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    sysinfo_set_item_val("clock.faddr", NULL, (unative_t)faddr);
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    sysinfo_set_item_val("clock.faddr", NULL, (unative_t) faddr);
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}
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}
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/** Update public counters
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/** Update public counters
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 *
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 *