I tweaked the kernel and boot loader to load the kernel at 0xdf000000, physical address. I did the following changes to setup the initial page table.
However during boot, in arch/i386/kernel/head.S when the paging bit is set
movl %eax,%cr0 /* ..and set paging (PG) bit */
My computer hangs!!
Any idea why??
-Ravi
.org 0x1000
ENTRY(swapper_pg_dir)
.fill 0x37c,4,0
.long 0xdf002007
.long 0xdf003007
.fill 0x2,4,0
/* default: 766 entries */
.long 0xdf002007
.long 0xdf003007
/* default: 254 entries */
.fill 0x7e,4,0
/*
* The page tables are initialized to only 8MB here - the final page
* tables are set up later depending on memory size.
*/
.org 0x2000
ENTRY(pg0)
.org 0x3000
ENTRY(pg1)
Arch/i386/kernel/head.S
/*
* Initialize page tables
*/
movl $pg0-__PAGE_OFFSET,%edi /* initialize page tables */
movl $007,%eax /* "007" doesn't mean with right to kill, but
PRESENT+RW+USER */
addl $0xdf000000,%eax
2: stosl
add $0x1000,%eax
cmp $empty_zero_page-__PAGE_OFFSET,%edi
jne 2b
/*
* Enable paging
*/
3:
movl $swapper_pg_dir-__PAGE_OFFSET,%eax
movl %eax,%cr3 /* set the page table pointer.. */
movl %cr0,%eax
orl $0x80000000,%eax
movl %eax,%cr0 /* ..and set paging (PG) bit */ ---------------- Fails here
jmp 1f /* flush the prefetch-queue */
-
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This archive was generated by hypermail 2b29 : Mon Mar 31 2003 - 22:00:25 EST