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Add symbolic name for system page directory end, and change constant to

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a calculation for the system page directory tables.
This commit is contained in:
rgrimes 1993-09-29 02:37:41 +00:00
parent 080bdc25b8
commit b8355fea64
3 changed files with 9 additions and 6 deletions
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5
sys/amd64/amd64/locore.S
View File

@ -80,6 +80,7 @@
.set SYSTEM,0xFE000000 # virtual address of system start
/*note: gas copys sign bit (e.g. arithmetic >>), can't do SYSTEM>>22! */
.set SYSPDROFF,0x3F8 # Page dir index of System Base
.set SYSPDREND,0x3FA # Page dir index of System End
/*
@ -343,8 +344,8 @@ ENTRY(btext)
movl %eax,(%esi) # which is where temp maps!
/* kernel pde's */
movl $ 3,%ecx # for this many pde s,
lea (SYSPDROFF*4)(%esi), %ebx # offset of pde for kernel
movl $(SYSPDREND-SYSPDROFF+1), %ecx # for this many pde s,
lea (SYSPDROFF*4)(%esi), %ebx # offset of pde for kernel
fillkpt
/* install a pde recursively mapping page directory as a page table! */

5
sys/amd64/amd64/locore.s
View File

@ -80,6 +80,7 @@
.set SYSTEM,0xFE000000 # virtual address of system start
/*note: gas copys sign bit (e.g. arithmetic >>), can't do SYSTEM>>22! */
.set SYSPDROFF,0x3F8 # Page dir index of System Base
.set SYSPDREND,0x3FA # Page dir index of System End
/*
@ -343,8 +344,8 @@ ENTRY(btext)
movl %eax,(%esi) # which is where temp maps!
/* kernel pde's */
movl $ 3,%ecx # for this many pde s,
lea (SYSPDROFF*4)(%esi), %ebx # offset of pde for kernel
movl $(SYSPDREND-SYSPDROFF+1), %ecx # for this many pde s,
lea (SYSPDROFF*4)(%esi), %ebx # offset of pde for kernel
fillkpt
/* install a pde recursively mapping page directory as a page table! */

5
sys/i386/i386/locore.s
View File

@ -80,6 +80,7 @@
.set SYSTEM,0xFE000000 # virtual address of system start
/*note: gas copys sign bit (e.g. arithmetic >>), can't do SYSTEM>>22! */
.set SYSPDROFF,0x3F8 # Page dir index of System Base
.set SYSPDREND,0x3FA # Page dir index of System End
/*
@ -343,8 +344,8 @@ ENTRY(btext)
movl %eax,(%esi) # which is where temp maps!
/* kernel pde's */
movl $ 3,%ecx # for this many pde s,
lea (SYSPDROFF*4)(%esi), %ebx # offset of pde for kernel
movl $(SYSPDREND-SYSPDROFF+1), %ecx # for this many pde s,
lea (SYSPDROFF*4)(%esi), %ebx # offset of pde for kernel
fillkpt
/* install a pde recursively mapping page directory as a page table! */