From eb114b9c880a8fbcf1ad461ff7fc9a37f7fc7cb6 Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Wed, 14 Mar 2012 01:18:43 +0100 Subject: Fix Xen bootstrap at virtual address above 1GiB * i386/intel/pmap.h (lin2pdpnum): New macro. * i386/intel/pmap.c (pmap_set_page_readonly_init): Use lin2pdpnum macro instead of hardcoding 0. --- i386/intel/pmap.c | 2 +- i386/intel/pmap.h | 7 +++++++ 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/i386/intel/pmap.c b/i386/intel/pmap.c index 86d2415..76055f8 100644 --- a/i386/intel/pmap.c +++ b/i386/intel/pmap.c @@ -831,7 +831,7 @@ void pmap_set_page_readonly_init(void *_vaddr) { vm_offset_t vaddr = (vm_offset_t) _vaddr; #if PAE pt_entry_t *pdpbase = (void*) boot_info.pt_base; - vm_offset_t dirbase = ptetokv(pdpbase[0]); + vm_offset_t dirbase = ptetokv(pdpbase[lin2pdpnum(vaddr)]); #else vm_offset_t dirbase = boot_info.pt_base; #endif diff --git a/i386/intel/pmap.h b/i386/intel/pmap.h index e02ad36..11bca80 100644 --- a/i386/intel/pmap.h +++ b/i386/intel/pmap.h @@ -100,6 +100,13 @@ typedef unsigned int pt_entry_t; #define lin2pdenum(a) (((a) >> PDESHIFT) & PDEMASK) #endif +/* + * Convert linear offset to page directory pointer index + */ +#if PAE +#define lin2pdpnum(a) (((a) >> PDPSHIFT) & PDPMASK) +#endif + /* * Convert page descriptor index to linear address */ -- cgit v1.2.3