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#include <error.h>
#include <sys/io.h>
#include <mach.h>
#include <hurd.h>
#include <device/device.h>
#include "ddekit/resources.h"
#include "config.h"
int ddekit_request_dma(int nr) {
#if 0
return l4io_request_dma(nr);
#endif
return -1;
}
int ddekit_release_dma(int nr) {
#if 0
return l4io_release_dma(nr);
#endif
return -1;
}
/** Request an IO region
*
* \return 0 success
* \return -1 error
*/
int ddekit_request_io(ddekit_addr_t start, ddekit_addr_t count) {
return ioperm (start, count, 1);
}
/** Release an IO region.
*
* \return 0 success
* \return <0 error
*/
int ddekit_release_io(ddekit_addr_t start, ddekit_addr_t count) {
return ioperm (start, count, 0);
}
/* Get a memory object for the whole physical address space. */
static memory_object_t get_physmem_object(void)
{
mach_port_t master_device_port;
mach_port_t iopl_dev;
memory_object_t obj;
kern_return_t err;
/* first open master device port */
err = get_privileged_ports(NULL, &master_device_port);
if (err)
error(2, err, "get_physmem_object() can't get master device port");
/* now use it to open iopl device */
err = device_open(master_device_port, VM_PROT_READ | VM_PROT_WRITE, "mem", &iopl_dev);
if (err)
error(2, err, "get_physmem_object() can't open iopl device");
mach_port_deallocate(mach_task_self(), master_device_port);
/* now use that to get a memory object for the physical address space */
err = device_map(iopl_dev, D_READ|D_WRITE, 0, ~0, &obj, 0);
if (err)
error(2, err, "get_physmem_object() can't obtain memory object");
mach_port_deallocate(mach_task_self(), iopl_dev);
return obj;
}
/** Request a memory region.
*
* \return vaddr virtual address of memory region
* \return 0 success
* \return -1 error
*/
int ddekit_request_mem(ddekit_addr_t start, ddekit_addr_t count, ddekit_addr_t *vaddr) {
memory_object_t iopl_mem;
kern_return_t err;
*vaddr = 0;
iopl_mem = get_physmem_object();
err = vm_map(mach_task_self(),
(vm_address_t *) vaddr,
count,
0, /* mask */
1, /* anywhere */
iopl_mem,
(vm_offset_t)start,
0, /* copy on write */
VM_PROT_READ|VM_PROT_WRITE,
VM_PROT_READ|VM_PROT_WRITE,
VM_INHERIT_SHARE);
mach_port_deallocate(mach_task_self(),iopl_mem);
if( err )
{
error(0, err, "mmio_map(): can't vm_map");
return -1;
}
return 0;
}
/** Release memory region.
*
* \return 0 success
* \return <0 error
*/
int ddekit_release_mem(ddekit_addr_t start, ddekit_addr_t count) {
kern_return_t err = vm_deallocate(mach_task_self(), start, count);
if( err )
{
error(0, err, "mmio_unmap(): can't dealloc mmio space");
return -1;
}
return 0;
}
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