Hello !
SunOS needs that the DVMA (IOMMU) area between 0xFFF00000 and 0xFFFFFFFF is marked as available (/virtual-memory .properties).
With this patch, SunOS 4.1.4 can run on QEMU/OpenBIOS.
But.
I'm not quite sure this is right on all targets because "ofmem_update_memory_available" is modified to include the address -1=0xFFFFFFFF in the range.
Index: arch/sparc32/ofmem_sparc32.c =================================================================== --- arch/sparc32/ofmem_sparc32.c (revision 1335) +++ arch/sparc32/ofmem_sparc32.c (copy) @@ -254,5 +254,5 @@ ofmem_claim_phys(ofmem_arch_get_phys_top(), s_ofmem_data.ofmem.ramsize - ofmem_arch_get_phys_top(), 0); /* Claim OpenBIOS reserved space */ - ofmem_claim_virt(0xffd00000, 0x300000, 0); + ofmem_claim_virt(0xffd00000, 0x200000, 0); } Index: libopenbios/ofmem_common.c =================================================================== --- libopenbios/ofmem_common.c (revision 1335) +++ libopenbios/ofmem_common.c (copy) @@ -321,7 +321,7 @@ prop = *mem_prop;
for (r = range; r; r=r->next) { - if (r->start >= top_address) { + if (r->start > top_address) { break; }
@@ -334,8 +334,8 @@ }
/* tail */ - if (start < top_address) { - ofmem_arch_create_available_entry(ph, &prop[ncells], start, top_address - start); + if (start <= top_address) { + ofmem_arch_create_available_entry(ph, &prop[ncells], start, top_address + 1 - start); ncells += ofmem_arch_get_available_entry_size(ph); }
@@ -348,7 +348,7 @@ ofmem_t *ofmem = ofmem_arch_get_private();
ofmem_update_memory_available(s_phandle_memory, ofmem->phys_range, - &phys_range_prop, &phys_range_prop_size, &phys_range_prop_used, ofmem_arch_get_phys_top()); + &phys_range_prop, &phys_range_prop_size, &phys_range_prop_used, ofmem_arch_get_phys_top() - 1); ofmem_update_memory_available(s_phandle_mmu, ofmem->virt_range, &virt_range_prop, &virt_range_prop_size, &virt_range_prop_used, (ucell)-1); ofmem_update_mmu_translations(); ====================================================================
Regards. Olivier