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Use 1GB virtual pages to implement the direct map on architectures that

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support this feature.

Wrap a nearby line that is too long.

MFC after: 6 weeks
This commit is contained in:
alc 2007-12-08 21:48:27 +00:00
parent 23d5cf5443
commit 785a20bb5f
1 changed files with 24 additions and 13 deletions
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37
sys/amd64/amd64/pmap.c
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@ -422,7 +422,8 @@ create_pagetables(vm_paddr_t *firstaddr)
if (ndmpdp < 4) /* Minimum 4GB of dirmap */
ndmpdp = 4;
DMPDPphys = allocpages(firstaddr, NDMPML4E);
DMPDphys = allocpages(firstaddr, ndmpdp);
if ((amd_feature & AMDID_PAGE1GB) == 0)
DMPDphys = allocpages(firstaddr, ndmpdp);
dmaplimit = (vm_paddr_t)ndmpdp << PDPSHIFT;
/* Fill in the underlying page table pages */
@ -448,21 +449,31 @@ create_pagetables(vm_paddr_t *firstaddr)
/* And connect up the PD to the PDP */
for (i = 0; i < NKPDPE; i++) {
((pdp_entry_t *)KPDPphys)[i + KPDPI] = KPDphys + (i << PAGE_SHIFT);
((pdp_entry_t *)KPDPphys)[i + KPDPI] = KPDphys +
(i << PAGE_SHIFT);
((pdp_entry_t *)KPDPphys)[i + KPDPI] |= PG_RW | PG_V | PG_U;
}
/* Now set up the direct map space using 2MB pages */
for (i = 0; i < NPDEPG * ndmpdp; i++) {
((pd_entry_t *)DMPDphys)[i] = (vm_paddr_t)i << PDRSHIFT;
((pd_entry_t *)DMPDphys)[i] |= PG_RW | PG_V | PG_PS | PG_G;
}
/* And the direct map space's PDP */
for (i = 0; i < ndmpdp; i++) {
((pdp_entry_t *)DMPDPphys)[i] = DMPDphys + (i << PAGE_SHIFT);
((pdp_entry_t *)DMPDPphys)[i] |= PG_RW | PG_V | PG_U;
/* Now set up the direct map space using either 2MB or 1GB pages */
if ((amd_feature & AMDID_PAGE1GB) == 0) {
for (i = 0; i < NPDEPG * ndmpdp; i++) {
((pd_entry_t *)DMPDphys)[i] = (vm_paddr_t)i << PDRSHIFT;
((pd_entry_t *)DMPDphys)[i] |= PG_RW | PG_V | PG_PS |
PG_G;
}
/* And the direct map space's PDP */
for (i = 0; i < ndmpdp; i++) {
((pdp_entry_t *)DMPDPphys)[i] = DMPDphys +
(i << PAGE_SHIFT);
((pdp_entry_t *)DMPDPphys)[i] |= PG_RW | PG_V | PG_U;
}
} else {
for (i = 0; i < ndmpdp; i++) {
((pdp_entry_t *)DMPDPphys)[i] =
(vm_paddr_t)i << PDPSHIFT;
((pdp_entry_t *)DMPDPphys)[i] |= PG_RW | PG_V | PG_PS |
PG_G;
}
}
/* And recursively map PML4 to itself in order to get PTmap */