Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Implement a hack to give pmap a better chance of working on SS10's with 

no external L2 cache.
XXX this is ugly and will go away when cpu_softc gets done for the 1.3 release

Also, copyright police (s/Harvard University/Harvard College/).
This commit is contained in:
abrown 1996-05-16 14:30:54 +00:00
parent 37b8aea219
commit fe454d89f3
1 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
sys/arch/sparc/sparc/pmap.c
View File

@ -1,8 +1,8 @@
/* $NetBSD: pmap.c,v 1.56 1996/04/01 21:09:39 pk Exp $ */
/* $NetBSD: pmap.c,v 1.57 1996/05/16 14:30:54 abrown Exp $ */
/*
* Copyright (c) 1996
* The President and Fellows of Harvard University. All rights reserved.
* The President and Fellows of Harvard College. All rights reserved.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
@ -31,7 +31,6 @@
* Harvard University.
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* This product includes software developed by Harvard University.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
@ -316,6 +315,8 @@ u_int *kernel_pagtable_store; /* 128k of storage to map the kernel */
u_int *kernel_iopte_table; /* 64k of storage for iommu */
u_int kernel_iopte_table_pa;
static int cant_cache_pagetables = 0; /* 1 if page tables are uncachable */
#endif
#define MA_SIZE 32 /* size of memory descriptor arrays */
@ -3500,6 +3501,7 @@ pmap_bootstrap4m(void)
(lda(SRMMU_PCR, ASI_SRMMU) & SRMMU_PCR_MB)) {
int bytes, numpages;
cant_cache_pagetables = 1;
#define DO_THE_MATH(math) \
bytes = (math); \
@ -3742,6 +3744,8 @@ pmap_pinit(pm)
* rg_seg_ptps pointer indicates invalid for the 4m)
*/
urp = malloc(SRMMU_L1SIZE * sizeof(int), M_VMPMAP, M_WAITOK);
if (cant_cache_pagetables)
kvm_uncache(urp, ((SRMMU_L1SIZE*sizeof(int))+NBPG-1)/NBPG);
#ifdef DEBUG
if ((u_int) urp % (SRMMU_L1SIZE * sizeof(int)))
@ -5714,6 +5718,8 @@ printf("pmap_enu4m: bizarre segment table fill during sleep\n");
free(tblp,M_VMPMAP);
goto rgretry;
}
if (cant_cache_pagetables)
kvm_uncache(tblp, (size+NBPG-1)/NBPG);
rp->rg_seg_ptps = (int *)tblp;
qzero(tblp, size);
@ -5734,6 +5740,8 @@ printf("pmap_enter: pte filled during sleep\n"); /* can this happen? */
free(pte, M_VMPMAP);
goto sretry;
}
if (cant_cache_pagetables)
kvm_uncache((caddr_t)pte, (size+NBPG-1)/NBPG);
qzero((caddr_t)pte, size);
sp->sg_pte = pte;