/*
* Copyright (c) 2006 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup libc
* @{
*/
/** @file
*/
#include <ddi.h>
#include <libc.h>
#include <task.h>
#include <as.h>
#include <align.h>
#include <libarch/config.h>
#include <kernel/ddi/ddi_arg.h>
/** Map piece of physical memory to task.
*
* Caller of this function must have the CAP_MEM_MANAGER capability.
*
* @param pf Physical address of the starting frame.
* @param vp Virtual address of the starting page.
* @param pages Number of pages to map.
* @param flags Flags for the new address space area.
*
* @return 0 on success, EPERM if the caller lacks the
* CAP_MEM_MANAGER capability, ENOENT if there is no task
* with specified ID and ENOMEM if there was some problem
* in creating address space area.
*/
int physmem_map(void *pf, void *vp, unsigned long pages, int flags)
{
return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) pf, (sysarg_t) vp, pages,
flags);
}
/** Enable I/O space range to task.
*
* Caller of this function must have the IO_MEM_MANAGER capability.
*
* @param id Task ID.
* @param ioaddr Starting address of the I/O range.
* @param size Size of the range.
*
* @return 0 on success, EPERM if the caller lacks the
* CAP_IO_MANAGER capability, ENOENT if there is no task
* with specified ID and ENOMEM if there was some problem
* in allocating memory.
*/
int iospace_enable(task_id_t id, void *ioaddr, unsigned long size)
{
ddi_ioarg_t arg;
arg.task_id = id;
arg.ioaddr = ioaddr;
arg.size = size;
return __SYSCALL1(SYS_IOSPACE_ENABLE, (sysarg_t) &arg);
}
/** Interrupt control
*
* @param enable 1 - enable interrupts, 0 - disable interrupts
*/
int preemption_control(int enable)
{
return __SYSCALL1(SYS_PREEMPT_CONTROL, (sysarg_t) enable);
}
/** Enable PIO for specified I/O range.
*
* @param pio_addr I/O start address.
* @param size Size of the I/O region.
* @param use_addr Address where the final address for application's PIO
* will be stored.
*
* @return Zero on success or negative error code.
*/
int pio_enable(void *pio_addr, size_t size, void **use_addr)
{
void *phys;
void *virt;
size_t offset;
unsigned int pages;
#ifdef IO_SPACE_BOUNDARY
if (pio_addr < IO_SPACE_BOUNDARY) {
*use_addr = pio_addr;
return iospace_enable(task_get_id(), pio_addr, size);
}
#endif
phys = ALIGN_DOWN((uintptr_t) pio_addr, PAGE_SIZE);
offset = pio_addr - phys;
pages = ALIGN_UP(offset + size, PAGE_SIZE) >> PAGE_WIDTH;
virt = as_get_mappable_page(pages);
*use_addr = virt + offset;
return physmem_map(phys, virt, pages, AS_AREA_READ | AS_AREA_WRITE);
}
/** @}
*/