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Teach /dev/kmem about direct mapped addresses.

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Note that a better solution for how to make kernacc work for direct mapped
addresses is needed for all platforms that use them.
This commit is contained in:
Jake Burkholder 2002-12-27 19:18:04 +00:00
parent 5606ac9e89
commit 66a6d547ec
1 changed files with 6 additions and 5 deletions
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11
sys/sparc64/sparc64/mem.c
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@ -130,6 +130,7 @@ mmrw(dev_t dev, struct uio *uio, int flags)
struct iovec *iov;
int error = 0;
vm_offset_t addr, eaddr, o, v = 0;
vm_prot_t prot;
vm_size_t c = 0;
u_long asi;
char *buf = NULL;
@ -198,12 +199,12 @@ mmrw(dev_t dev, struct uio *uio, int flags)
if (pmap_extract(kernel_pmap, addr) == 0)
return EFAULT;
if (!kernacc((caddr_t)uio->uio_offset, c,
uio->uio_rw == UIO_READ ?
VM_PROT_READ : VM_PROT_WRITE)) {
return (EFAULT);
}
prot = (uio->uio_rw == UIO_READ) ? VM_PROT_READ :
VM_PROT_WRITE;
v = uio->uio_offset;
if (v < VM_MIN_DIRECT_ADDRESS &&
kernacc((caddr_t)v, c, prot) == FALSE)
return (EFAULT);
error = uiomove((caddr_t)v, c, uio);
if (uio->uio_rw == UIO_WRITE)
icache_flush(v, v + c);