Date: Fri, 08 Nov 2002 16:29:43 +0900 (JST) From: Mitsuru IWASAKI <iwasaki@jp.FreeBSD.org> To: gallatin@cs.duke.edu Cc: petry@NetMasters.Com, julian@elischer.org, sidcarter@symonds.net, current@FreeBSD.ORG Subject: Re: Kernel not booting....Immediate crash Message-ID: <20021108.162943.74756425.iwasaki@jp.FreeBSD.org> In-Reply-To: <20021108.135430.68032362.iwasaki@jp.FreeBSD.org> References: <200211071859.gA7IxbEV075350@netwolf.NetMasters.Com> <15818.50698.91676.542116@grasshopper.cs.duke.edu> <20021108.135430.68032362.iwasaki@jp.FreeBSD.org>
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> OK, some questions:
> - What is the size of your base memory (reported by boot loader)?
> - Does attached patches solve your problem?
> - Is this problem specific to IBM Netvista?
>
> Thanks
>
> Index: locore.s
> ===================================================================
> RCS file: /home/ncvs/src/sys/i386/i386/locore.s,v
Oops, not this file.
Thanks
Index: machdep.c
===================================================================
RCS file: /home/ncvs/src/sys/i386/i386/machdep.c,v
retrieving revision 1.545
diff -u -r1.545 machdep.c
--- machdep.c 25 Oct 2002 19:10:56 -0000 1.545
+++ machdep.c 8 Nov 2002 04:50:05 -0000
@@ -1513,6 +1513,7 @@
struct vm86context vmc;
vm_offset_t pa, physmap[PHYSMAP_SIZE];
pt_entry_t *pte;
+ pt_entry_t saved_pte[160];
char *cp;
struct bios_smap *smap;
@@ -1520,6 +1521,14 @@
bzero(physmap, sizeof(physmap));
basemem = 0;
+ for (pa = (4 << PAGE_SHIFT); pa < ISA_HOLE_START; pa += PAGE_SIZE)
+ pmap_kenter(KERNBASE + pa, pa);
+ pte = (pt_entry_t *)vm86paddr;
+ for (i = 4; i < 160; i++) {
+ saved_pte[i] = pte[i];
+ pte[i] |= PG_V | PG_RW | PG_U;
+ }
+
/*
* map page 1 R/W into the kernel page table so we can use it
* as a buffer. The kernel will unmap this page later.
@@ -1629,6 +1638,12 @@
* pmap_mapdev, but since no memory needs to be
* allocated we simply change the mapping.
*/
+ pte = (pt_entry_t *)vm86paddr;
+ for (i = 4; i < 160; i++)
+ pte[i] = saved_pte[i];
+ for (pa = (4 << PAGE_SHIFT); pa < ISA_HOLE_START; pa += PAGE_SIZE)
+ pmap_kremove(KERNBASE + pa);
+
for (pa = trunc_page(basemem * 1024);
pa < ISA_HOLE_START; pa += PAGE_SIZE)
pmap_kenter(KERNBASE + pa, pa);
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