diff options
Diffstat (limited to 'sys/powerpc/booke/booke_machdep.c')
| -rw-r--r-- | sys/powerpc/booke/booke_machdep.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/powerpc/booke/booke_machdep.c b/sys/powerpc/booke/booke_machdep.c index 0d4da968154e..8d04f7ee1133 100644 --- a/sys/powerpc/booke/booke_machdep.c +++ b/sys/powerpc/booke/booke_machdep.c @@ -249,6 +249,7 @@ static int booke_check_for_fdt(uint32_t arg1, vm_offset_t *dtbp) { void *ptr; + int fdt_size; if (arg1 % 8 != 0) return (-1); @@ -257,6 +258,19 @@ booke_check_for_fdt(uint32_t arg1, vm_offset_t *dtbp) if (fdt_check_header(ptr) != 0) return (-1); + /* + * Read FDT total size from the header of FDT. + * This for sure hits within first page which is + * already mapped. + */ + fdt_size = fdt_totalsize((void *)ptr); + + /* + * Ok, arg1 points to FDT, so we need to map it in. + * First, unmap this page and then map FDT again with full size + */ + pmap_early_io_unmap((vm_offset_t)ptr, PAGE_SIZE); + ptr = (void *)pmap_early_io_map(arg1, fdt_size); *dtbp = (vm_offset_t)ptr; return (0); |