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 *
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 *
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 * @return 0 on success or an error code from errno.h.
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 * @return 0 on success or an error code from errno.h.
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 */
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 */
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int ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size)
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int ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size)
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{
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{
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    count_t bits;
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    size_t bits;
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    bits = ioaddr + size;
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    bits = ioaddr + size;
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    if (bits > IO_PORTS)
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    if (bits > IO_PORTS)
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        return ENOENT;
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        return ENOENT;
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    }
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    }
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    /*
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    /*
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     * Enable the range and we are done.
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     * Enable the range and we are done.
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     */
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     */
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    bitmap_clear_range(&task->arch.iomap, (index_t) ioaddr, (count_t) size);
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    bitmap_clear_range(&task->arch.iomap, (size_t) ioaddr, (size_t) size);
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    /*
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    /*
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     * Increment I/O Permission bitmap generation counter.
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     * Increment I/O Permission bitmap generation counter.
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     */
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     */
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    task->arch.iomapver++;
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    task->arch.iomapver++;
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 *
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 *
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 * Interrupts must be disabled prior this call.
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 * Interrupts must be disabled prior this call.
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 */
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 */
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void io_perm_bitmap_install(void)
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void io_perm_bitmap_install(void)
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{
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{
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    count_t bits;
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    size_t bits;
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    ptr_16_64_t cpugdtr;
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    ptr_16_64_t cpugdtr;
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    descriptor_t *gdt_p;
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    descriptor_t *gdt_p;
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    tss_descriptor_t *tss_desc;
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    tss_descriptor_t *tss_desc;
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    count_t ver;
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    size_t ver;
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    /* First, copy the I/O Permission Bitmap. */
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    /* First, copy the I/O Permission Bitmap. */
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    spinlock_lock(&TASK->lock);
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    spinlock_lock(&TASK->lock);
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    ver = TASK->arch.iomapver;
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    ver = TASK->arch.iomapver;
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    if ((bits = TASK->arch.iomap.bits)) {
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    if ((bits = TASK->arch.iomap.bits)) {