diff options
Diffstat (limited to 'sys/kern/subr_uio.c')
| -rw-r--r-- | sys/kern/subr_uio.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/sys/kern/subr_uio.c b/sys/kern/subr_uio.c index 7b593487..2b47395 100644 --- a/sys/kern/subr_uio.c +++ b/sys/kern/subr_uio.c @@ -152,6 +152,52 @@ copyout_nofault(const void *kaddr, void *udaddr, size_t len) return (error); } +#define PHYS_PAGE_COUNT(len) (howmany(len, PAGE_SIZE) + 1) + +int +physcopyin(void *src, vm_paddr_t dst, size_t len) +{ + vm_page_t m[PHYS_PAGE_COUNT(len)]; + struct iovec iov[1]; + struct uio uio; + int i; + + iov[0].iov_base = src; + iov[0].iov_len = len; + uio.uio_iov = iov; + uio.uio_iovcnt = 1; + uio.uio_offset = 0; + uio.uio_resid = len; + uio.uio_segflg = UIO_SYSSPACE; + uio.uio_rw = UIO_WRITE; + for (i = 0; i < PHYS_PAGE_COUNT(len); i++, dst += PAGE_SIZE) + m[i] = PHYS_TO_VM_PAGE(dst); + return (uiomove_fromphys(m, dst & PAGE_MASK, len, &uio)); +} + +int +physcopyout(vm_paddr_t src, void *dst, size_t len) +{ + vm_page_t m[PHYS_PAGE_COUNT(len)]; + struct iovec iov[1]; + struct uio uio; + int i; + + iov[0].iov_base = dst; + iov[0].iov_len = len; + uio.uio_iov = iov; + uio.uio_iovcnt = 1; + uio.uio_offset = 0; + uio.uio_resid = len; + uio.uio_segflg = UIO_SYSSPACE; + uio.uio_rw = UIO_READ; + for (i = 0; i < PHYS_PAGE_COUNT(len); i++, src += PAGE_SIZE) + m[i] = PHYS_TO_VM_PAGE(src); + return (uiomove_fromphys(m, src & PAGE_MASK, len, &uio)); +} + +#undef PHYS_PAGE_COUNT + int uiomove(void *cp, int n, struct uio *uio) { |
