diff options
| -rw-r--r-- | i386/i386at/model_dep.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/i386/i386at/model_dep.c b/i386/i386at/model_dep.c index 1fc1bf9..ef2d672 100644 --- a/i386/i386at/model_dep.c +++ b/i386/i386at/model_dep.c @@ -319,7 +319,7 @@ i386at_init(void) /* XXX move to intel/pmap.h */ extern pt_entry_t *kernel_page_dir; int nb_direct, i; - vm_offset_t addr; + vm_offset_t addr, delta; /* * Initialize the PIC prior to any possible call to an spl. @@ -389,8 +389,10 @@ i386at_init(void) * page-level write protection works in kernel mode. */ #if VM_MIN_KERNEL_ADDRESS != LINEAR_MIN_KERNEL_ADDRESS - init_alloc_aligned(0, &addr); - nb_direct = (addr + NPTES * PAGE_SIZE - 1) / (NPTES * PAGE_SIZE); + delta = VM_MIN_KERNEL_ADDRESS - LINEAR_MIN_KERNEL_ADDRESS; + if ((vm_offset_t)(-delta) < delta) + delta = (vm_offset_t)(-delta); + nb_direct = delta >> PDESHIFT; for (i = 0; i < nb_direct; i++) kernel_page_dir[lin2pdenum(VM_MIN_KERNEL_ADDRESS) + i] = kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS) + i]; |