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Move CR4.PGE enabling code after paging is enabled via CR0.PG based on

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the description (2.5. CONTROL REGISTERS) of Intel developer's manual at:
ftp://download.intel.com/design/PentiumII/manuals/24319202.pdf

Reviewed by:	peter, bde, tlambert2@mindspring.com
Pointed-out by:	"Shin'ya Kumabuchi" <kumabu@t3.rim.or.jp>
MFC after:	1 week
This commit is contained in:
iwasaki 2001-08-22 15:41:43 +00:00
parent f5c34b17b4
commit a847e062d6
3 changed files with 18 additions and 21 deletions
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13
sys/amd64/amd64/locore.S
View File

@ -374,6 +374,12 @@ begin:
movl IdlePTD,%esi
movl %esi,PCB_CR3(%eax)
testl $CPUID_PGE, R(cpu_feature)
jz 1f
movl %cr4, %eax
orl $CR4_PGE, %eax
movl %eax, %cr4
1:
pushl physfree /* value of first for init386(first) */
call init386 /* wire 386 chip for unix operation */
@ -719,13 +725,6 @@ trycpuid: /* Use the `cpuid' instruction. */
create_pagetables:
testl $CPUID_PGE, R(cpu_feature)
jz 1f
movl %cr4, %eax
orl $CR4_PGE, %eax
movl %eax, %cr4
1:
/* Find end of kernel image (rounded up to a page boundary). */
movl $R(_end),%esi

13
sys/amd64/amd64/locore.s
View File

@ -374,6 +374,12 @@ begin:
movl IdlePTD,%esi
movl %esi,PCB_CR3(%eax)
testl $CPUID_PGE, R(cpu_feature)
jz 1f
movl %cr4, %eax
orl $CR4_PGE, %eax
movl %eax, %cr4
1:
pushl physfree /* value of first for init386(first) */
call init386 /* wire 386 chip for unix operation */
@ -719,13 +725,6 @@ trycpuid: /* Use the `cpuid' instruction. */
create_pagetables:
testl $CPUID_PGE, R(cpu_feature)
jz 1f
movl %cr4, %eax
orl $CR4_PGE, %eax
movl %eax, %cr4
1:
/* Find end of kernel image (rounded up to a page boundary). */
movl $R(_end),%esi

13
sys/i386/i386/locore.s
View File

@ -374,6 +374,12 @@ begin:
movl IdlePTD,%esi
movl %esi,PCB_CR3(%eax)
testl $CPUID_PGE, R(cpu_feature)
jz 1f
movl %cr4, %eax
orl $CR4_PGE, %eax
movl %eax, %cr4
1:
pushl physfree /* value of first for init386(first) */
call init386 /* wire 386 chip for unix operation */
@ -719,13 +725,6 @@ trycpuid: /* Use the `cpuid' instruction. */
create_pagetables:
testl $CPUID_PGE, R(cpu_feature)
jz 1f
movl %cr4, %eax
orl $CR4_PGE, %eax
movl %eax, %cr4
1:
/* Find end of kernel image (rounded up to a page boundary). */
movl $R(_end),%esi