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pc64: use 2MB pages for preallocpages()

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This commit is contained in:
cinap_lenrek 2014-06-01 06:31:50 +02:00
parent c9f91d5015
commit fb97665a14
2 changed files with 9 additions and 9 deletions
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17
sys/src/9/pc64/main.c
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@ -259,7 +259,7 @@ static void
preallocpages(void)
{
Pallocmem *pm;
uintptr va;
uintptr va, base, top;
vlong size;
ulong np;
int i;
@ -272,17 +272,18 @@ preallocpages(void)
size = (uvlong)np * BY2PG;
size += sizeof(Page) + BY2PG; /* round up */
size = (size / (sizeof(Page) + BY2PG)) * sizeof(Page);
size = PGROUND(size);
size = ROUND(size, PGLSZ(1));
np = size/BY2PG;
for(i=0; i<nelem(palloc.mem); i++){
pm = &palloc.mem[i];
if((pm->base + size) <= VMAPSIZE && pm->npage >= np){
va = VMAP + pm->base;
pmap(m->pml4, pm->base | PTEGLOBAL|PTEWRITE|PTEVALID, va, size);
base = ROUND(pm->base, PGLSZ(1));
top = pm->base + (uvlong)pm->npage * BY2PG;
if((base + size) <= VMAPSIZE && (top - base) >= size){
va = base + VMAP;
pmap(m->pml4, base | PTEGLOBAL|PTEWRITE|PTEVALID, va, size);
palloc.pages = (Page*)va;
pm->base += size;
pm->npage -= np;
pm->base = base + size;
pm->npage = (top - pm->base)/BY2PG;
break;
}
}

1
sys/src/9/pc64/mem.h
View file

@ -22,7 +22,6 @@
#define BY2V 8 /* bytes per double word */
#define BY2PG (0x1000ull) /* bytes per page */
#define WD2PG (BY2PG/BY2WD) /* words per page */
#define BY2XPG (2*MiB) /* bytes per big page */
#define PGSHIFT 12 /* log(BY2PG) */
#define ROUND(s, sz) (((s)+((sz)-1))&~((sz)-1))
#define PGROUND(s) ROUND(s, BY2PG)