int
aspace_map_region_anywhere(
id_t id,
vaddr_t * start,
size_t extent,
vmflags_t flags,
vmpagesize_t pagesz,
const char * name,
paddr_t pmem
)
{
int status;
retry:
if ((status = aspace_find_hole(id, 0, extent, pagesz, start)))
return status;
if ((status = aspace_add_region(id, *start, extent, flags, pagesz, name))) {
if (status == -ENOTUNIQ)
goto retry; /* we lost a race with someone */
return status;
}
if ((status = aspace_map_pmem(id, pmem, *start, extent))) {
aspace_del_region(id, *start, extent);
return status;
}
return 0;
}
int
sys_aspace_map_pmem(
id_t id,
paddr_t pmem,
vaddr_t start,
size_t extent
)
{
int status;
if (current->uid != 0)
return -EPERM;
if ((id < UASPACE_MIN_ID) || (id > UASPACE_MAX_ID))
return -EINVAL;
/* Only allow user-space to map user memory */
get_cpu_var(umem_only) = true;
status = aspace_map_pmem(id, pmem, start, extent);
get_cpu_var(umem_only) = false;
return status;
}
int
aspace_map_region(
id_t id,
vaddr_t start,
size_t extent,
vmflags_t flags,
vmpagesize_t pagesz,
const char * name,
paddr_t pmem
)
{
int status;
if ((status = aspace_add_region(id, start, extent, flags, pagesz, name)))
return status;
if ((status = aspace_map_pmem(id, pmem, start, extent))) {
aspace_del_region(id, start, extent);
return status;
}
return 0;
}
static void* map( paddr_t paddr, size_t extent )
{
id_t my_id;
int status;
vaddr_t vstart;
// Debug1( "paddr=%#lx extent=%#lx\n", paddr, extent );
if ( ( status = aspace_get_myid( &my_id ) ) ) {
printf("ERROR: aspace_get_myid() status=%d\n", status);
return (void*) -1;
}
if ( ( status = aspace_find_hole( my_id, 0, extent,
PAGE_SIZE, &vstart ) ) ) {
printf("ERROR: aspace_find_hole() status=%d\n", status);
return (void*) -1;
}
// Debug1("vstart=%#lx\n",vstart);
if ( ( status = aspace_add_region( my_id, vstart, extent,
VM_READ | VM_WRITE | VM_USER, PAGE_SIZE, "application") ) ) {
printf("ERROR: aspace_add_region() status=%d\n", status);
return (void*) -1;
}
if ( ( status = aspace_map_pmem( my_id, paddr, vstart, extent ) ) ) {
printf("ERROR: aspace_map_pmem() status=%d\n", status);
aspace_del_region( my_id, vstart, extent );
return (void*) -1;
}
// Debug1( "paddr=%#lx vstart=%#lx len=%#lx\n", paddr, vstart, extent );
return (void*) vstart;
}
