void
bs_remap_earlyboot(void)
{
int i;
vm_offset_t pa, spa, va;
vm_memattr_t ma;
for (i = 0; i < earlyboot_map_idx; i++) {
spa = earlyboot_mappings[i].addr;
if (spa == earlyboot_mappings[i].virt &&
pmap_dev_direct_mapped(spa, earlyboot_mappings[i].size) == 0)
continue;
ma = VM_MEMATTR_DEFAULT;
switch (earlyboot_mappings[i].flags) {
case BUS_SPACE_MAP_CACHEABLE:
ma = VM_MEMATTR_CACHEABLE;
break;
case BUS_SPACE_MAP_PREFETCHABLE:
ma = VM_MEMATTR_PREFETCHABLE;
break;
}
pa = trunc_page(spa);
va = trunc_page(earlyboot_mappings[i].virt);
while (pa < spa + earlyboot_mappings[i].size) {
pmap_kenter_attr(va, pa, ma);
va += PAGE_SIZE;
pa += PAGE_SIZE;
}
}
}
/*
* allow user processes to MMAP some memory sections
* instead of going through read/write
*/
int
memmmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
int prot, vm_memattr_t *memattr)
{
int i;
/*
* /dev/mem is the only one that makes sense through this
* interface. For /dev/kmem any physaddr we return here
* could be transient and hence incorrect or invalid at
* a later time.
*/
if (dev2unit(dev) != CDEV_MINOR_MEM)
return (-1);
/* Only direct-mapped addresses. */
if (mem_valid(offset, 0)
&& pmap_dev_direct_mapped(offset, 0))
return (EFAULT);
*paddr = offset;
for (i = 0; i < mem_range_softc.mr_ndesc; i++) {
if (!(mem_range_softc.mr_desc[i].mr_flags & MDF_ACTIVE))
continue;
if (offset >= mem_range_softc.mr_desc[i].mr_base &&
offset < mem_range_softc.mr_desc[i].mr_base +
mem_range_softc.mr_desc[i].mr_len) {
switch (mem_range_softc.mr_desc[i].mr_flags &
MDF_ATTRMASK) {
case MDF_WRITEBACK:
*memattr = VM_MEMATTR_WRITE_BACK;
break;
case MDF_WRITECOMBINE:
*memattr = VM_MEMATTR_WRITE_COMBINING;
break;
case MDF_UNCACHEABLE:
*memattr = VM_MEMATTR_UNCACHEABLE;
break;
case MDF_WRITETHROUGH:
*memattr = VM_MEMATTR_WRITE_THROUGH;
break;
}
break;
}
}
return (0);
}
/* ARGSUSED */
int
memrw(struct cdev *dev, struct uio *uio, int flags)
{
struct iovec *iov;
int error = 0;
vm_offset_t va, eva, off, v;
vm_prot_t prot;
struct vm_page m;
vm_page_t marr;
vm_size_t cnt;
cnt = 0;
error = 0;
GIANT_REQUIRED;
while (uio->uio_resid > 0 && !error) {
iov = uio->uio_iov;
if (iov->iov_len == 0) {
uio->uio_iov++;
uio->uio_iovcnt--;
if (uio->uio_iovcnt < 0)
panic("memrw");
continue;
}
if (dev2unit(dev) == CDEV_MINOR_MEM) {
kmem_direct_mapped: v = uio->uio_offset;
off = uio->uio_offset & PAGE_MASK;
cnt = PAGE_SIZE - ((vm_offset_t)iov->iov_base &
PAGE_MASK);
cnt = min(cnt, PAGE_SIZE - off);
cnt = min(cnt, iov->iov_len);
if (mem_valid(v, cnt)) {
error = EFAULT;
break;
}
if (!pmap_dev_direct_mapped(v, cnt)) {
error = uiomove((void *)v, cnt, uio);
} else {
m.phys_addr = trunc_page(v);
marr = &m;
error = uiomove_fromphys(&marr, off, cnt, uio);
}
}
else if (dev2unit(dev) == CDEV_MINOR_KMEM) {
va = uio->uio_offset;
if ((va < VM_MIN_KERNEL_ADDRESS) || (va > virtual_end))
goto kmem_direct_mapped;
va = trunc_page(uio->uio_offset);
eva = round_page(uio->uio_offset
+ iov->iov_len);
/*
* Make sure that all the pages are currently resident
* so that we don't create any zero-fill pages.
*/
for (; va < eva; va += PAGE_SIZE)
if (pmap_extract(kernel_pmap, va) == 0)
return (EFAULT);
prot = (uio->uio_rw == UIO_READ)
? VM_PROT_READ : VM_PROT_WRITE;
va = uio->uio_offset;
if (kernacc((void *) va, iov->iov_len, prot)
== FALSE)
return (EFAULT);
error = uiomove((void *)va, iov->iov_len, uio);
continue;
}
}
return (error);
}