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If extracting an address from the kernel pmap, see if the address is outside 

the mapped address range.  If so, try to look it up via the BAT table.  If
successful, translate and return the BAT'ed pa.
This commit is contained in:
matt 2003-04-04 22:38:05 +00:00
parent b8943cbf89
commit 2f9404413f
1 changed files with 20 additions and 1 deletions
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21
sys/arch/powerpc/oea/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.6 2003/04/02 02:47:19 thorpej Exp $ */
/* $NetBSD: pmap.c,v 1.7 2003/04/04 22:38:05 matt Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
@ -1822,6 +1822,25 @@ pmap_extract(pmap_t pm, vaddr_t va, paddr_t *pap)
struct pvo_entry *pvo;
register_t msr;
int s;
/*
* If this is a kernel pmap lookup, also check the battable
* and if we get a hit, translate the VA to a PA using the
* BAT entries. Don't check for VM_MAX_KENREL_ADDRESS is
* that will wrap back to 0.
*/
if (pm == pmap_kernel() &&
(va < VM_MIN_KERNEL_ADDRESS ||
(KERNEL2_SR < 15 && VM_MAX_KERNEL_ADDRESS <= va))) {
register_t batu = battable[va >> ADDR_SR_SHFT].batu;
if (BAT_VALID_P(batu,0) && BAT_VA_MATCH_P(batu,va)) {
register_t batl = battable[va >> ADDR_SR_SHFT].batl;
register_t mask = (~(batu & BAT_BL) << 15) & ~0x1ffffL;
*pap = (batl & mask) | (va & ~mask);
return TRUE;
}
return FALSE;
}
s = splvm();
msr = pmap_interrupts_off();