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 * @param flags Flags for host zone selection and address processing.
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 * @param flags Flags for host zone selection and address processing.
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 * @param order Allocate exactly 2^order frames.
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 * @param order Allocate exactly 2^order frames.
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 *
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 *
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 * @return Allocated frame.
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 * @return Allocated frame.
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 */
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 */
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__address frame_alloc(int flags, __u8 order)
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__address frame_alloc(int flags, __u8 order, int * status)
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{
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{
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    ipl_t ipl;
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    ipl_t ipl;
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    link_t *cur, *tmp;
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    link_t *cur, *tmp;
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    zone_t *z;
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    zone_t *z;
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    zone_t *zone = NULL;
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    zone_t *zone = NULL;
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    if (!zone) {
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    if (!zone) {
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        if (flags & FRAME_PANIC)
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        if (flags & FRAME_PANIC)
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            panic("Can't allocate frame.\n");
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            panic("Can't allocate frame.\n");
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- 
 
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- 
 
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        /*
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        /*
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         * TODO: Sleep until frames are available again.
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         * TODO: Sleep until frames are available again.
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         */
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         */
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        spinlock_unlock(&zone_head_lock);
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        spinlock_unlock(&zone_head_lock);
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        interrupts_restore(ipl);
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        interrupts_restore(ipl);
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- 
 
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        if (flags & FRAME_NON_BLOCKING) {
- 
 
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            ASSERT(status != NULL);
- 
 
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            *status = FRAME_NO_MEMORY;
- 
 
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            return NULL;
- 
 
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        }
- 
 
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        panic("Sleep not implemented.\n");
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        panic("Sleep not implemented.\n");
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        goto loop;
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        goto loop;
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    }
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    }
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    if (flags & FRAME_KA)
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    if (flags & FRAME_KA)
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        v = PA2KA(v);
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        v = PA2KA(v);
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- 
 
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    if (flags & FRAME_NON_BLOCKING) {
- 
 
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        ASSERT(status != NULL);
- 
 
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        *status = FRAME_OK;
- 
 
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    }
- 
 
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    return v;
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    return v;
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}
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}
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/** Free a frame.
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/** Free a frame.
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 *
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 *