Clean up some dead wood. Kill the page table page for mapping the
proc0/idlePTD/bootstrap stack into place in user space. We save 4K. Remove p0upa, it is now unneeded.
This commit is contained in:
Peter Wemm
parent
4f71948c41
commit
e8fa13fdd9
|
|
@ -34,7 +34,7 @@
|
|||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
|
||||
* $Id: locore.s,v 1.82 1997/03/22 18:52:03 kato Exp $
|
||||
* $Id: locore.s,v 1.83 1997/04/07 07:15:49 peter Exp $
|
||||
*
|
||||
* originally from: locore.s, by William F. Jolitz
|
||||
*
|
||||
|
|
@ -110,8 +110,6 @@ _bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */
|
|||
|
||||
_KERNend: .long 0 /* phys addr end of kernel (just after bss) */
|
||||
physfree: .long 0 /* phys addr of next free page */
|
||||
p0upa: .long 0 /* phys addr of proc0's UPAGES */
|
||||
p0upt: .long 0 /* phys addr of proc0's UPAGES page table */
|
||||
|
||||
.globl _IdlePTD
|
||||
_IdlePTD: .long 0 /* phys addr of kernel PTD */
|
||||
|
|
@ -120,6 +118,7 @@ _KPTphys: .long 0 /* phys addr of kernel page tables */
|
|||
|
||||
.globl _proc0paddr
|
||||
_proc0paddr: .long 0 /* address of proc 0 address space */
|
||||
p0upa: .long 0 /* phys addr of proc0's UPAGES */
|
||||
|
||||
#ifdef BDE_DEBUGGER
|
||||
.globl _bdb_exists /* flag to indicate BDE debugger is present */
|
||||
|
|
@ -753,10 +752,6 @@ over_symalloc:
|
|||
addl $KERNBASE, %esi
|
||||
movl %esi, R(_proc0paddr)
|
||||
|
||||
/* Allocate proc0's page table for the UPAGES. */
|
||||
ALLOCPAGES(1)
|
||||
movl %esi,R(p0upt)
|
||||
|
||||
/* Map read-only from zero to the end of the kernel text section */
|
||||
xorl %eax, %eax
|
||||
#ifdef BDE_DEBUGGER
|
||||
|
|
@ -794,11 +789,6 @@ map_read_write:
|
|||
movl $1, %ecx
|
||||
fillkptphys($PG_RW)
|
||||
|
||||
/* Map proc0's page table for the UPAGES. */
|
||||
movl R(p0upt), %eax
|
||||
movl $1, %ecx
|
||||
fillkptphys($PG_RW)
|
||||
|
||||
/* Map proc0's UPAGES in the physical way ... */
|
||||
movl R(p0upa), %eax
|
||||
movl $UPAGES, %ecx
|
||||
|
|
@ -809,18 +799,6 @@ map_read_write:
|
|||
movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx
|
||||
fillkptphys($PG_RW)
|
||||
|
||||
/* Map proc0s UPAGES in the special page table for this purpose ... */
|
||||
movl R(p0upa), %eax
|
||||
movl $KSTKPTEOFF, %ebx
|
||||
movl $UPAGES, %ecx
|
||||
fillkpt(R(p0upt), $PG_RW)
|
||||
|
||||
/* ... and put the page table in the pde. */
|
||||
movl R(p0upt), %eax
|
||||
movl $KSTKPTDI, %ebx
|
||||
movl $1, %ecx
|
||||
fillkpt(R(_IdlePTD), $PG_RW)
|
||||
|
||||
/* install a pde for temporary double map of bottom of VA */
|
||||
movl R(_KPTphys), %eax
|
||||
xorl %ebx, %ebx
|
||||
|
|
|
|||
|
|
@ -34,7 +34,7 @@
|
|||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
|
||||
* $Id: locore.s,v 1.82 1997/03/22 18:52:03 kato Exp $
|
||||
* $Id: locore.s,v 1.83 1997/04/07 07:15:49 peter Exp $
|
||||
*
|
||||
* originally from: locore.s, by William F. Jolitz
|
||||
*
|
||||
|
|
@ -110,8 +110,6 @@ _bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */
|
|||
|
||||
_KERNend: .long 0 /* phys addr end of kernel (just after bss) */
|
||||
physfree: .long 0 /* phys addr of next free page */
|
||||
p0upa: .long 0 /* phys addr of proc0's UPAGES */
|
||||
p0upt: .long 0 /* phys addr of proc0's UPAGES page table */
|
||||
|
||||
.globl _IdlePTD
|
||||
_IdlePTD: .long 0 /* phys addr of kernel PTD */
|
||||
|
|
@ -120,6 +118,7 @@ _KPTphys: .long 0 /* phys addr of kernel page tables */
|
|||
|
||||
.globl _proc0paddr
|
||||
_proc0paddr: .long 0 /* address of proc 0 address space */
|
||||
p0upa: .long 0 /* phys addr of proc0's UPAGES */
|
||||
|
||||
#ifdef BDE_DEBUGGER
|
||||
.globl _bdb_exists /* flag to indicate BDE debugger is present */
|
||||
|
|
@ -753,10 +752,6 @@ over_symalloc:
|
|||
addl $KERNBASE, %esi
|
||||
movl %esi, R(_proc0paddr)
|
||||
|
||||
/* Allocate proc0's page table for the UPAGES. */
|
||||
ALLOCPAGES(1)
|
||||
movl %esi,R(p0upt)
|
||||
|
||||
/* Map read-only from zero to the end of the kernel text section */
|
||||
xorl %eax, %eax
|
||||
#ifdef BDE_DEBUGGER
|
||||
|
|
@ -794,11 +789,6 @@ map_read_write:
|
|||
movl $1, %ecx
|
||||
fillkptphys($PG_RW)
|
||||
|
||||
/* Map proc0's page table for the UPAGES. */
|
||||
movl R(p0upt), %eax
|
||||
movl $1, %ecx
|
||||
fillkptphys($PG_RW)
|
||||
|
||||
/* Map proc0's UPAGES in the physical way ... */
|
||||
movl R(p0upa), %eax
|
||||
movl $UPAGES, %ecx
|
||||
|
|
@ -809,18 +799,6 @@ map_read_write:
|
|||
movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx
|
||||
fillkptphys($PG_RW)
|
||||
|
||||
/* Map proc0s UPAGES in the special page table for this purpose ... */
|
||||
movl R(p0upa), %eax
|
||||
movl $KSTKPTEOFF, %ebx
|
||||
movl $UPAGES, %ecx
|
||||
fillkpt(R(p0upt), $PG_RW)
|
||||
|
||||
/* ... and put the page table in the pde. */
|
||||
movl R(p0upt), %eax
|
||||
movl $KSTKPTDI, %ebx
|
||||
movl $1, %ecx
|
||||
fillkpt(R(_IdlePTD), $PG_RW)
|
||||
|
||||
/* install a pde for temporary double map of bottom of VA */
|
||||
movl R(_KPTphys), %eax
|
||||
xorl %ebx, %ebx
|
||||
|
|
|
|||
|
|
@ -34,7 +34,7 @@
|
|||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
|
||||
* $Id: locore.s,v 1.82 1997/03/22 18:52:03 kato Exp $
|
||||
* $Id: locore.s,v 1.83 1997/04/07 07:15:49 peter Exp $
|
||||
*
|
||||
* originally from: locore.s, by William F. Jolitz
|
||||
*
|
||||
|
|
@ -110,8 +110,6 @@ _bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */
|
|||
|
||||
_KERNend: .long 0 /* phys addr end of kernel (just after bss) */
|
||||
physfree: .long 0 /* phys addr of next free page */
|
||||
p0upa: .long 0 /* phys addr of proc0's UPAGES */
|
||||
p0upt: .long 0 /* phys addr of proc0's UPAGES page table */
|
||||
|
||||
.globl _IdlePTD
|
||||
_IdlePTD: .long 0 /* phys addr of kernel PTD */
|
||||
|
|
@ -120,6 +118,7 @@ _KPTphys: .long 0 /* phys addr of kernel page tables */
|
|||
|
||||
.globl _proc0paddr
|
||||
_proc0paddr: .long 0 /* address of proc 0 address space */
|
||||
p0upa: .long 0 /* phys addr of proc0's UPAGES */
|
||||
|
||||
#ifdef BDE_DEBUGGER
|
||||
.globl _bdb_exists /* flag to indicate BDE debugger is present */
|
||||
|
|
@ -753,10 +752,6 @@ over_symalloc:
|
|||
addl $KERNBASE, %esi
|
||||
movl %esi, R(_proc0paddr)
|
||||
|
||||
/* Allocate proc0's page table for the UPAGES. */
|
||||
ALLOCPAGES(1)
|
||||
movl %esi,R(p0upt)
|
||||
|
||||
/* Map read-only from zero to the end of the kernel text section */
|
||||
xorl %eax, %eax
|
||||
#ifdef BDE_DEBUGGER
|
||||
|
|
@ -794,11 +789,6 @@ map_read_write:
|
|||
movl $1, %ecx
|
||||
fillkptphys($PG_RW)
|
||||
|
||||
/* Map proc0's page table for the UPAGES. */
|
||||
movl R(p0upt), %eax
|
||||
movl $1, %ecx
|
||||
fillkptphys($PG_RW)
|
||||
|
||||
/* Map proc0's UPAGES in the physical way ... */
|
||||
movl R(p0upa), %eax
|
||||
movl $UPAGES, %ecx
|
||||
|
|
@ -809,18 +799,6 @@ map_read_write:
|
|||
movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx
|
||||
fillkptphys($PG_RW)
|
||||
|
||||
/* Map proc0s UPAGES in the special page table for this purpose ... */
|
||||
movl R(p0upa), %eax
|
||||
movl $KSTKPTEOFF, %ebx
|
||||
movl $UPAGES, %ecx
|
||||
fillkpt(R(p0upt), $PG_RW)
|
||||
|
||||
/* ... and put the page table in the pde. */
|
||||
movl R(p0upt), %eax
|
||||
movl $KSTKPTDI, %ebx
|
||||
movl $1, %ecx
|
||||
fillkpt(R(_IdlePTD), $PG_RW)
|
||||
|
||||
/* install a pde for temporary double map of bottom of VA */
|
||||
movl R(_KPTphys), %eax
|
||||
xorl %ebx, %ebx
|
||||
|
|
|
|||
Loading…
Reference in New Issue