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Code Issues Releases Activity

- Correct a problem with the last commit. The CMAP ptes need to be zeroed

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prior to invalidating the TLB to be certain that the processor doesn't
   keep a cached copy.

Discussed with:	pete
Paniced:	tegge
Pointy Hat:	The usual spot
This commit is contained in:
Jeff Roberson 2003-10-01 00:27:09 +00:00
parent 6a8b93fe2b
commit fb9bde2d2b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=120613
1 changed files with 5 additions and 5 deletions
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10
sys/i386/i386/pmap.c
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@ -2531,6 +2531,7 @@ pmap_zero_page(vm_page_t m)
else
#endif
bzero(CADDR2, PAGE_SIZE);
*CMAP2 = 0;
#ifdef I386_CPU
invltlb();
#else
@ -2539,7 +2540,6 @@ pmap_zero_page(vm_page_t m)
#ifdef SMP
curthread->td_pcb->pcb_switchout = NULL;
#endif
*CMAP2 = 0;
mtx_unlock(&CMAPCADDR12_lock);
}
@ -2566,6 +2566,7 @@ pmap_zero_page_area(vm_page_t m, int off, int size)
else
#endif
bzero((char *)CADDR2 + off, size);
*CMAP2 = 0;
#ifdef I386_CPU
invltlb();
#else
@ -2574,7 +2575,6 @@ pmap_zero_page_area(vm_page_t m, int off, int size)
#ifdef SMP
curthread->td_pcb->pcb_switchout = NULL;
#endif
*CMAP2 = 0;
mtx_unlock(&CMAPCADDR12_lock);
}
@ -2600,6 +2600,7 @@ pmap_zero_page_idle(vm_page_t m)
else
#endif
bzero(CADDR3, PAGE_SIZE);
*CMAP3 = 0;
#ifdef I386_CPU
invltlb();
#else
@ -2608,7 +2609,6 @@ pmap_zero_page_idle(vm_page_t m)
#ifdef SMP
curthread->td_pcb->pcb_switchout = NULL;
#endif
*CMAP3 = 0;
}
/*
@ -2632,6 +2632,8 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
*CMAP1 = PG_V | VM_PAGE_TO_PHYS(src) | PG_A;
*CMAP2 = PG_V | PG_RW | VM_PAGE_TO_PHYS(dst) | PG_A | PG_M;
bcopy(CADDR1, CADDR2, PAGE_SIZE);
*CMAP1 = 0;
*CMAP2 = 0;
#ifdef I386_CPU
invltlb();
#else
@ -2641,8 +2643,6 @@ pmap_copy_page(vm_page_t src, vm_page_t dst)
#ifdef SMP
curthread->td_pcb->pcb_switchout = NULL;
#endif
*CMAP1 = 0;
*CMAP2 = 0;
mtx_unlock(&CMAPCADDR12_lock);
}