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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
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=24693
@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
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* $Id: locore.s,v 1.82 1997/03/22 18:52:03 kato Exp $
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* $Id: locore.s,v 1.83 1997/04/07 07:15:49 peter Exp $
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*
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* originally from: locore.s, by William F. Jolitz
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*
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@ -110,8 +110,6 @@ _bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */
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_KERNend: .long 0 /* phys addr end of kernel (just after bss) */
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physfree: .long 0 /* phys addr of next free page */
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p0upa: .long 0 /* phys addr of proc0's UPAGES */
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p0upt: .long 0 /* phys addr of proc0's UPAGES page table */
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.globl _IdlePTD
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_IdlePTD: .long 0 /* phys addr of kernel PTD */
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@ -120,6 +118,7 @@ _KPTphys: .long 0 /* phys addr of kernel page tables */
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.globl _proc0paddr
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_proc0paddr: .long 0 /* address of proc 0 address space */
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p0upa: .long 0 /* phys addr of proc0's UPAGES */
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#ifdef BDE_DEBUGGER
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.globl _bdb_exists /* flag to indicate BDE debugger is present */
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@ -753,10 +752,6 @@ over_symalloc:
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addl $KERNBASE, %esi
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movl %esi, R(_proc0paddr)
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/* Allocate proc0's page table for the UPAGES. */
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ALLOCPAGES(1)
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movl %esi,R(p0upt)
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/* Map read-only from zero to the end of the kernel text section */
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xorl %eax, %eax
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#ifdef BDE_DEBUGGER
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@ -794,11 +789,6 @@ map_read_write:
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movl $1, %ecx
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fillkptphys($PG_RW)
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/* Map proc0's page table for the UPAGES. */
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movl R(p0upt), %eax
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movl $1, %ecx
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fillkptphys($PG_RW)
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/* Map proc0's UPAGES in the physical way ... */
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movl R(p0upa), %eax
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movl $UPAGES, %ecx
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@ -809,18 +799,6 @@ map_read_write:
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movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx
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fillkptphys($PG_RW)
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/* Map proc0s UPAGES in the special page table for this purpose ... */
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movl R(p0upa), %eax
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movl $KSTKPTEOFF, %ebx
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movl $UPAGES, %ecx
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fillkpt(R(p0upt), $PG_RW)
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/* ... and put the page table in the pde. */
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movl R(p0upt), %eax
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movl $KSTKPTDI, %ebx
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movl $1, %ecx
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fillkpt(R(_IdlePTD), $PG_RW)
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/* install a pde for temporary double map of bottom of VA */
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movl R(_KPTphys), %eax
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xorl %ebx, %ebx
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
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* $Id: locore.s,v 1.82 1997/03/22 18:52:03 kato Exp $
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* $Id: locore.s,v 1.83 1997/04/07 07:15:49 peter Exp $
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*
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* originally from: locore.s, by William F. Jolitz
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*
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@ -110,8 +110,6 @@ _bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */
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_KERNend: .long 0 /* phys addr end of kernel (just after bss) */
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physfree: .long 0 /* phys addr of next free page */
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p0upa: .long 0 /* phys addr of proc0's UPAGES */
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p0upt: .long 0 /* phys addr of proc0's UPAGES page table */
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.globl _IdlePTD
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_IdlePTD: .long 0 /* phys addr of kernel PTD */
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@ -120,6 +118,7 @@ _KPTphys: .long 0 /* phys addr of kernel page tables */
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.globl _proc0paddr
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_proc0paddr: .long 0 /* address of proc 0 address space */
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p0upa: .long 0 /* phys addr of proc0's UPAGES */
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#ifdef BDE_DEBUGGER
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.globl _bdb_exists /* flag to indicate BDE debugger is present */
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@ -753,10 +752,6 @@ over_symalloc:
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addl $KERNBASE, %esi
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movl %esi, R(_proc0paddr)
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/* Allocate proc0's page table for the UPAGES. */
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ALLOCPAGES(1)
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movl %esi,R(p0upt)
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/* Map read-only from zero to the end of the kernel text section */
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xorl %eax, %eax
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#ifdef BDE_DEBUGGER
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@ -794,11 +789,6 @@ map_read_write:
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movl $1, %ecx
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fillkptphys($PG_RW)
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/* Map proc0's page table for the UPAGES. */
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movl R(p0upt), %eax
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movl $1, %ecx
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fillkptphys($PG_RW)
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/* Map proc0's UPAGES in the physical way ... */
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movl R(p0upa), %eax
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movl $UPAGES, %ecx
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@ -809,18 +799,6 @@ map_read_write:
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movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx
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fillkptphys($PG_RW)
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/* Map proc0s UPAGES in the special page table for this purpose ... */
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movl R(p0upa), %eax
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movl $KSTKPTEOFF, %ebx
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movl $UPAGES, %ecx
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fillkpt(R(p0upt), $PG_RW)
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/* ... and put the page table in the pde. */
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movl R(p0upt), %eax
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movl $KSTKPTDI, %ebx
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movl $1, %ecx
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fillkpt(R(_IdlePTD), $PG_RW)
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/* install a pde for temporary double map of bottom of VA */
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movl R(_KPTphys), %eax
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xorl %ebx, %ebx
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
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* $Id: locore.s,v 1.82 1997/03/22 18:52:03 kato Exp $
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* $Id: locore.s,v 1.83 1997/04/07 07:15:49 peter Exp $
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*
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* originally from: locore.s, by William F. Jolitz
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*
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@ -110,8 +110,6 @@ _bootinfo: .space BOOTINFO_SIZE /* bootinfo that we can handle */
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_KERNend: .long 0 /* phys addr end of kernel (just after bss) */
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physfree: .long 0 /* phys addr of next free page */
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p0upa: .long 0 /* phys addr of proc0's UPAGES */
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p0upt: .long 0 /* phys addr of proc0's UPAGES page table */
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.globl _IdlePTD
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_IdlePTD: .long 0 /* phys addr of kernel PTD */
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@ -120,6 +118,7 @@ _KPTphys: .long 0 /* phys addr of kernel page tables */
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.globl _proc0paddr
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_proc0paddr: .long 0 /* address of proc 0 address space */
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p0upa: .long 0 /* phys addr of proc0's UPAGES */
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#ifdef BDE_DEBUGGER
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.globl _bdb_exists /* flag to indicate BDE debugger is present */
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@ -753,10 +752,6 @@ over_symalloc:
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addl $KERNBASE, %esi
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movl %esi, R(_proc0paddr)
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/* Allocate proc0's page table for the UPAGES. */
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ALLOCPAGES(1)
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movl %esi,R(p0upt)
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/* Map read-only from zero to the end of the kernel text section */
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xorl %eax, %eax
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#ifdef BDE_DEBUGGER
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@ -794,11 +789,6 @@ map_read_write:
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movl $1, %ecx
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fillkptphys($PG_RW)
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/* Map proc0's page table for the UPAGES. */
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movl R(p0upt), %eax
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movl $1, %ecx
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fillkptphys($PG_RW)
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/* Map proc0's UPAGES in the physical way ... */
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movl R(p0upa), %eax
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movl $UPAGES, %ecx
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@ -809,18 +799,6 @@ map_read_write:
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movl $ISA_HOLE_LENGTH>>PAGE_SHIFT, %ecx
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fillkptphys($PG_RW)
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/* Map proc0s UPAGES in the special page table for this purpose ... */
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movl R(p0upa), %eax
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movl $KSTKPTEOFF, %ebx
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movl $UPAGES, %ecx
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fillkpt(R(p0upt), $PG_RW)
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/* ... and put the page table in the pde. */
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movl R(p0upt), %eax
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movl $KSTKPTDI, %ebx
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movl $1, %ecx
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fillkpt(R(_IdlePTD), $PG_RW)
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/* install a pde for temporary double map of bottom of VA */
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movl R(_KPTphys), %eax
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xorl %ebx, %ebx
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