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Implement proper versions of kenter_pa and kremove, I've based them on versions provided by Richard E.

This commit is contained in:
chris 2001-07-06 20:15:13 +00:00
parent 8593b82c71
commit 4c32798eb8
1 changed files with 77 additions and 3 deletions
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80
sys/arch/arm/arm32/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.12 2001/06/25 23:22:38 chris Exp $ */
/* $NetBSD: pmap.c,v 1.13 2001/07/06 20:15:13 chris Exp $ */
/*
* Copyright (c) 2001 Richard Earnshaw
@ -2303,7 +2303,54 @@ pmap_kenter_pa(va, pa, prot)
paddr_t pa;
vm_prot_t prot;
{
pmap_enter(pmap_kernel(), va, pa, prot, PMAP_WIRED);
pt_entry_t *pte;
#ifdef DIAGNOSTIC
int bank, off;
if ((bank = vm_physseg_find(atop(pa), &off)) != -1) {
struct pv_entry *pv;
pv = &vm_physmem[bank].pmseg.pvent[off];
if (pv->pv_pmap != NULL)
panic("pmap_kenter_pa: %08lx multiply mapped\n", pa);
}
#endif
if (!pmap_pde_v(pmap_pde(pmap_kernel(), va))) {
/*
* For the kernel pmaps it would be better to ensure
* that they are always present, and to grow the
* kernel as required.
*/
vm_offset_t l2pa;
struct vm_page *m;
/* Allocate a page table */
m = uvm_pagealloc(NULL, 0, NULL, UVM_PGA_USERESERVE);
if (m == NULL) {
/*
* No page available. We're the kernel
* pmap, so die.
*/
panic("pmap_kenter_pa: no free pages");
}
/* Wire this page table into the L1. */
l2pa = VM_PAGE_TO_PHYS(m);
pmap_zero_page(l2pa);
pmap_map_in_l1(pmap_kernel(), va, l2pa);
++(pmap_kernel())->pm_stats.resident_count;
}
pte = vtopte(va);
if (pmap_pte_v(pte))
{
cpu_tlb_flushID_SE(va);
cpu_cache_purgeID_rng(va, PAGE_SIZE);
}
*pte = L2_PTE(pa, AP_KRW);
/* pmap_enter(pmap_kernel(), va, pa, prot, PMAP_WIRED); */
}
void
@ -2312,7 +2359,34 @@ pmap_kremove(va, len)
vsize_t len;
{
for (len >>= PAGE_SHIFT; len > 0; len--, va += PAGE_SIZE) {
pmap_remove(pmap_kernel(), va, va + PAGE_SIZE);
pt_entry_t *pte;
#ifdef DIAGNOSTIC
int bank, off;
paddr_t pa;
if (!pmap_pde_v(pmap_pde(pmap_kernel(), va)))
panic("pmap_kremove: no pde\n");
#endif
pte = vtopte(va);
#ifdef DIAGNOSTIC
pa = pmap_pte_pa(pte);
if ((bank = vm_physseg_find(atop(pa), &off)) != -1) {
struct pv_entry *pv;
pv = &vm_physmem[bank].pmseg.pvent[off];
if (pv->pv_pmap != NULL)
panic("pmap_kremove: %08lx multiply mapped\n",
pa);
}
#endif
/* We assume that we will only be called with small
regions of memory. */
cpu_cache_purgeID_rng(va, PAGE_SIZE);
*pte = 0;
cpu_tlb_flushID_SE(va);
/* pmap_remove(pmap_kernel(), va, va + PAGE_SIZE); */
}
}