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 */
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 */
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/** @file
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/** @file
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 */
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 */
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#include <ddi.h>
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#include <ddi.h>
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#include <libarch/ddi.h>
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#include <libc.h>
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#include <libc.h>
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#include <task.h>
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#include <task.h>
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#include <as.h>
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#include <align.h>
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#include <libarch/config.h>
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#include <kernel/ddi/ddi_arg.h>
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#include <kernel/ddi/ddi_arg.h>
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/** Return unique device number.
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 *
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 * @return New unique device number.
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 *
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 */
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int device_assign_devno(void)
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{
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    return __SYSCALL0(SYS_DEVICE_ASSIGN_DEVNO);
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}
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/** Map piece of physical memory to task.
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/** Map piece of physical memory to task.
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 *
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 *
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 * Caller of this function must have the CAP_MEM_MANAGER capability.
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 * Caller of this function must have the CAP_MEM_MANAGER capability.
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 *
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 *
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 * @param pf Physical address of the starting frame.
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 * @param pf        Physical address of the starting frame.
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 * @param vp Virtual address of the sterting page.
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 * @param vp        Virtual address of the starting page.
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 * @param pages Number of pages to map.
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 * @param pages     Number of pages to map.
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 * @param flags Flags for the new address space area.
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 * @param flags     Flags for the new address space area.
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 *
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 *
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 * @return 0 on success, EPERM if the caller lacks the CAP_MEM_MANAGER capability,
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 * @return      0 on success, EPERM if the caller lacks the
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 *          CAP_MEM_MANAGER capability, ENOENT if there is no task
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 *     ENOENT if there is no task with specified ID and ENOMEM if there
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 *          with specified ID and ENOMEM if there was some problem
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 *     was some problem in creating address space area.
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 *          in creating address space area.
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 */
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 */
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int physmem_map(void *pf, void *vp, unsigned long pages, int flags)
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int physmem_map(void *pf, void *vp, unsigned long pages, int flags)
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{
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{
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    return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) pf, (sysarg_t) vp, pages, flags);
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    return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) pf, (sysarg_t) vp, pages,
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        flags);
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}
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}
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/** Enable I/O space range to task.
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/** Enable I/O space range to task.
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 *
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 *
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 * Caller of this function must have the IO_MEM_MANAGER capability.
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 * Caller of this function must have the IO_MEM_MANAGER capability.
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 *
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 *
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 * @param id Task ID.
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 * @param id        Task ID.
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 * @param ioaddr Starting address of the I/O range.
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 * @param ioaddr    Starting address of the I/O range.
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 * @param size Size of the range.
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 * @param size      Size of the range.
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 *
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 *
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 * @return 0 on success, EPERM if the caller lacks the CAP_IO_MANAGER capability,
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 * @return      0 on success, EPERM if the caller lacks the
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 *          CAP_IO_MANAGER capability, ENOENT if there is no task
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 *     ENOENT if there is no task with specified ID and ENOMEM if there
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 *          with specified ID and ENOMEM if there was some problem
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 *     was some problem in allocating memory.
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 *          in allocating memory.
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 */
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 */
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int iospace_enable(task_id_t id, void *ioaddr, unsigned long size)
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int iospace_enable(task_id_t id, void *ioaddr, unsigned long size)
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{
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{
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    ddi_ioarg_t arg;
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    ddi_ioarg_t arg;
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int preemption_control(int enable)
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int preemption_control(int enable)
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{
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{
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    return __SYSCALL1(SYS_PREEMPT_CONTROL, (sysarg_t) enable);
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    return __SYSCALL1(SYS_PREEMPT_CONTROL, (sysarg_t) enable);
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}
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}
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/** Enable PIO for specified I/O range.
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 *
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 * @param pio_addr  I/O start address.
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 * @param size      Size of the I/O region.
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 * @param use_addr  Address where the final address for application's PIO
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 *          will be stored.
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 *
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 * @return      Zero on success or negative error code.
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 */
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int pio_enable(void *pio_addr, size_t size, void **use_addr)
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{
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    void *phys;
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    void *virt;
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    size_t offset;
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    unsigned int pages;
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#ifdef IO_SPACE_BOUNDARY
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    if (pio_addr < IO_SPACE_BOUNDARY) {
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        *use_addr = pio_addr;
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        return iospace_enable(task_get_id(), pio_addr, size);
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    }
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#endif
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    phys = ALIGN_DOWN((uintptr_t) pio_addr, PAGE_SIZE);
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    offset = pio_addr - phys;
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    pages = ALIGN_UP(offset + size, PAGE_SIZE) >> PAGE_WIDTH;
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    virt = as_get_mappable_page(pages);
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    *use_addr = virt + offset;
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    return physmem_map(phys, virt, pages, AS_AREA_READ | AS_AREA_WRITE);
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}
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/** @}
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/** @}
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 */
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 */