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Use the kernel pmap's lock to guarantee that only one thread at a time is

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using either pmap_temp_map_1 or pmap_temp_map_2.

Tested by: kris@
This commit is contained in:
Alan Cox 2005-03-01 05:06:52 +00:00
parent cb950c23b2
commit 10891191fd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=142869
1 changed files with 10 additions and 0 deletions
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10
sys/sparc64/sparc64/pmap.c
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@ -1518,12 +1518,14 @@ pmap_zero_page(vm_page_t m)
cpu_block_zero((void *)va, PAGE_SIZE);
} else {
PMAP_STATS_INC(pmap_nzero_page_oc);
PMAP_LOCK(kernel_pmap);
va = pmap_temp_map_1 + (m->md.color * PAGE_SIZE);
tp = tsb_kvtotte(va);
tp->tte_data = TD_V | TD_8K | TD_PA(pa) | TD_CP | TD_CV | TD_W;
tp->tte_vpn = TV_VPN(va, TS_8K);
cpu_block_zero((void *)va, PAGE_SIZE);
tlb_page_demap(kernel_pmap, va);
PMAP_UNLOCK(kernel_pmap);
}
}
@ -1548,12 +1550,14 @@ pmap_zero_page_area(vm_page_t m, int off, int size)
bzero((void *)(va + off), size);
} else {
PMAP_STATS_INC(pmap_nzero_page_area_oc);
PMAP_LOCK(kernel_pmap);
va = pmap_temp_map_1 + (m->md.color * PAGE_SIZE);
tp = tsb_kvtotte(va);
tp->tte_data = TD_V | TD_8K | TD_PA(pa) | TD_CP | TD_CV | TD_W;
tp->tte_vpn = TV_VPN(va, TS_8K);
bzero((void *)(va + off), size);
tlb_page_demap(kernel_pmap, va);
PMAP_UNLOCK(kernel_pmap);
}
}
@ -1619,6 +1623,7 @@ pmap_copy_page(vm_page_t msrc, vm_page_t mdst)
PAGE_SIZE);
} else {
PMAP_STATS_INC(pmap_ncopy_page_doc);
PMAP_LOCK(kernel_pmap);
vdst = pmap_temp_map_1 + (mdst->md.color * PAGE_SIZE);
tp = tsb_kvtotte(vdst);
tp->tte_data =
@ -1627,6 +1632,7 @@ pmap_copy_page(vm_page_t msrc, vm_page_t mdst)
ascopyfrom(ASI_PHYS_USE_EC, psrc, (void *)vdst,
PAGE_SIZE);
tlb_page_demap(kernel_pmap, vdst);
PMAP_UNLOCK(kernel_pmap);
}
} else if (mdst->md.color == -1) {
if (msrc->md.color == DCACHE_COLOR(psrc)) {
@ -1636,6 +1642,7 @@ pmap_copy_page(vm_page_t msrc, vm_page_t mdst)
PAGE_SIZE);
} else {
PMAP_STATS_INC(pmap_ncopy_page_soc);
PMAP_LOCK(kernel_pmap);
vsrc = pmap_temp_map_1 + (msrc->md.color * PAGE_SIZE);
tp = tsb_kvtotte(vsrc);
tp->tte_data =
@ -1644,9 +1651,11 @@ pmap_copy_page(vm_page_t msrc, vm_page_t mdst)
ascopyto((void *)vsrc, ASI_PHYS_USE_EC, pdst,
PAGE_SIZE);
tlb_page_demap(kernel_pmap, vsrc);
PMAP_UNLOCK(kernel_pmap);
}
} else {
PMAP_STATS_INC(pmap_ncopy_page_oc);
PMAP_LOCK(kernel_pmap);
vdst = pmap_temp_map_1 + (mdst->md.color * PAGE_SIZE);
tp = tsb_kvtotte(vdst);
tp->tte_data =
@ -1660,6 +1669,7 @@ pmap_copy_page(vm_page_t msrc, vm_page_t mdst)
cpu_block_copy((void *)vsrc, (void *)vdst, PAGE_SIZE);
tlb_page_demap(kernel_pmap, vdst);
tlb_page_demap(kernel_pmap, vsrc);
PMAP_UNLOCK(kernel_pmap);
}
}