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1) Don't double map the kernel page tables. The double mapping was never

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used and went a long way toward confusing the code.
2) Fix proc0's initial stack to not be 48 bytes smaller than it needs to
   be.
3) Correct comment about 'first' arg to init386().
This commit is contained in:
David Greenman 1995-09-15 02:13:18 +00:00
parent b032e1f962
commit 6ce5b54918
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=10762
3 changed files with 21 additions and 18 deletions
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13
sys/amd64/amd64/locore.S
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
* $Id: locore.s,v 1.53 1995/06/28 04:42:25 davidg Exp $
* $Id: locore.s,v 1.54 1995/08/29 23:45:20 bde Exp $
*/
/*
@ -539,9 +539,9 @@ over_symalloc:
fillkpt
#endif /* KGDB || BDE_DEBUGGER */
/* now initialize the page dir, upages, p0stack PT, and page tables */
/* now initialize the page dir, upages, and p0stack PT */
movl $(1+UPAGES+1+NKPT),%ecx /* number of PTEs */
movl $(1+UPAGES+1),%ecx /* number of PTEs */
movl %esi,%eax /* phys address of PTD */
andl $PG_FRAME,%eax /* convert to PFN, should be a NOP */
orl $PG_V|PG_KW,%eax /* valid, kernel read/write */
@ -659,8 +659,8 @@ begin: /* now running relocated at KERNBASE where the system is linked to run */
addl $KERNBASE,%edx /* add virtual base */
movl %edx,_atdevbase
/* set up bootstrap stack - 48 bytes */
movl $_kstack+UPAGES*NBPG-4*12,%esp /* bootstrap stack end location */
/* set up bootstrap stack */
movl $_kstack+UPAGES*NBPG,%esp /* bootstrap stack end location */
xorl %eax,%eax /* mark end of frames */
movl %eax,%ebp
movl _proc0paddr,%eax
@ -683,7 +683,8 @@ reloc_gdt:
#endif /* BDE_DEBUGGER */
/*
* Skip over the page tables and the kernel stack
* Prepare "first" - physical address of first available page
* after the kernel+pdir+upages+p0stack+page tables
*/
lea ((1+UPAGES+1+NKPT)*NBPG)(%esi),%esi

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

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
* $Id: locore.s,v 1.53 1995/06/28 04:42:25 davidg Exp $
* $Id: locore.s,v 1.54 1995/08/29 23:45:20 bde Exp $
*/
/*
@ -539,9 +539,9 @@ over_symalloc:
fillkpt
#endif /* KGDB || BDE_DEBUGGER */
/* now initialize the page dir, upages, p0stack PT, and page tables */
/* now initialize the page dir, upages, and p0stack PT */
movl $(1+UPAGES+1+NKPT),%ecx /* number of PTEs */
movl $(1+UPAGES+1),%ecx /* number of PTEs */
movl %esi,%eax /* phys address of PTD */
andl $PG_FRAME,%eax /* convert to PFN, should be a NOP */
orl $PG_V|PG_KW,%eax /* valid, kernel read/write */
@ -659,8 +659,8 @@ begin: /* now running relocated at KERNBASE where the system is linked to run */
addl $KERNBASE,%edx /* add virtual base */
movl %edx,_atdevbase
/* set up bootstrap stack - 48 bytes */
movl $_kstack+UPAGES*NBPG-4*12,%esp /* bootstrap stack end location */
/* set up bootstrap stack */
movl $_kstack+UPAGES*NBPG,%esp /* bootstrap stack end location */
xorl %eax,%eax /* mark end of frames */
movl %eax,%ebp
movl _proc0paddr,%eax
@ -683,7 +683,8 @@ reloc_gdt:
#endif /* BDE_DEBUGGER */
/*
* Skip over the page tables and the kernel stack
* Prepare "first" - physical address of first available page
* after the kernel+pdir+upages+p0stack+page tables
*/
lea ((1+UPAGES+1+NKPT)*NBPG)(%esi),%esi

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

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)locore.s 7.3 (Berkeley) 5/13/91
* $Id: locore.s,v 1.53 1995/06/28 04:42:25 davidg Exp $
* $Id: locore.s,v 1.54 1995/08/29 23:45:20 bde Exp $
*/
/*
@ -539,9 +539,9 @@ over_symalloc:
fillkpt
#endif /* KGDB || BDE_DEBUGGER */
/* now initialize the page dir, upages, p0stack PT, and page tables */
/* now initialize the page dir, upages, and p0stack PT */
movl $(1+UPAGES+1+NKPT),%ecx /* number of PTEs */
movl $(1+UPAGES+1),%ecx /* number of PTEs */
movl %esi,%eax /* phys address of PTD */
andl $PG_FRAME,%eax /* convert to PFN, should be a NOP */
orl $PG_V|PG_KW,%eax /* valid, kernel read/write */
@ -659,8 +659,8 @@ begin: /* now running relocated at KERNBASE where the system is linked to run */
addl $KERNBASE,%edx /* add virtual base */
movl %edx,_atdevbase
/* set up bootstrap stack - 48 bytes */
movl $_kstack+UPAGES*NBPG-4*12,%esp /* bootstrap stack end location */
/* set up bootstrap stack */
movl $_kstack+UPAGES*NBPG,%esp /* bootstrap stack end location */
xorl %eax,%eax /* mark end of frames */
movl %eax,%ebp
movl _proc0paddr,%eax
@ -683,7 +683,8 @@ reloc_gdt:
#endif /* BDE_DEBUGGER */
/*
* Skip over the page tables and the kernel stack
* Prepare "first" - physical address of first available page
* after the kernel+pdir+upages+p0stack+page tables
*/
lea ((1+UPAGES+1+NKPT)*NBPG)(%esi),%esi