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[PowerPC64] Implement pmap_mincore() for moea64

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Implement pmap_mincore() for moea64.

This will need some slight tweaks when large page support in HPT lands.

Submitted by:	Fernando Eckhardt Valle <fernando.valle@eldorado.org.br>
Reviewed by:	bdragon
Differential Revision:	https://reviews.freebsd.org/D26314
This commit is contained in:
Brandon Bergren 2020-09-13 16:42:49 +00:00
parent b98a21f64a
commit 96f57c313d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=365690
1 changed files with 49 additions and 0 deletions
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49
sys/powerpc/aim/mmu_oea64.c
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@ -57,6 +57,7 @@ __FBSDID("$FreeBSD$");
#include <sys/lock.h>
#include <sys/msgbuf.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/rwlock.h>
@ -72,6 +73,7 @@ __FBSDID("$FreeBSD$");
#include <dev/ofw/openfirm.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_param.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
@ -315,6 +317,7 @@ static void *moea64_dump_pmap_init(unsigned blkpgs);
#ifdef __powerpc64__
static void moea64_page_array_startup(long);
#endif
static int moea64_mincore(pmap_t, vm_offset_t, vm_paddr_t *);
static struct pmap_funcs moea64_methods = {
.clear_modify = moea64_clear_modify,
@ -331,6 +334,7 @@ static struct pmap_funcs moea64_methods = {
.is_referenced = moea64_is_referenced,
.ts_referenced = moea64_ts_referenced,
.map = moea64_map,
.mincore = moea64_mincore,
.page_exists_quick = moea64_page_exists_quick,
.page_init = moea64_page_init,
.page_wired_mappings = moea64_page_wired_mappings,
@ -1221,6 +1225,51 @@ moea64_unwire(pmap_t pm, vm_offset_t sva, vm_offset_t eva)
PMAP_UNLOCK(pm);
}
static int
moea64_mincore(pmap_t pmap, vm_offset_t addr, vm_paddr_t *pap)
{
struct pvo_entry *pvo;
vm_paddr_t pa;
vm_page_t m;
int val;
bool managed;
PMAP_LOCK(pmap);
/* XXX Add support for superpages */
pvo = moea64_pvo_find_va(pmap, addr);
if (pvo != NULL) {
pa = PVO_PADDR(pvo);
m = PHYS_TO_VM_PAGE(pa);
managed = (pvo->pvo_vaddr & PVO_MANAGED) == PVO_MANAGED;
val = MINCORE_INCORE;
} else {
PMAP_UNLOCK(pmap);
return (0);
}
PMAP_UNLOCK(pmap);
if (m == NULL)
return (0);
if (managed) {
if (moea64_is_modified(m))
val |= MINCORE_MODIFIED | MINCORE_MODIFIED_OTHER;
if (moea64_is_referenced(m))
val |= MINCORE_REFERENCED | MINCORE_REFERENCED_OTHER;
}
if ((val & (MINCORE_MODIFIED_OTHER | MINCORE_REFERENCED_OTHER)) !=
(MINCORE_MODIFIED_OTHER | MINCORE_REFERENCED_OTHER) &&
managed) {
*pap = pa;
}
return (val);
}
/*
* This goes through and sets the physical address of our
* special scratch PTE to the PA we want to zero or copy. Because