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pc: map PCI address space as catchall region for not mapped addresses

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With a help of negative memory region priority PCI address space
is mapped underneath RAM regions effectively catching every access
to addresses not mapped by any other region.
It simplifies PCI address space mapping into system address space.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2013-10-29 13:57:34 +01:00
parent e689f7c668
commit 83d08f2673
6 changed files with 14 additions and 71 deletions
Download patch file Download diff file Expand all files Collapse all files

24
hw/pci-host/piix.c
View file

@ -103,8 +103,6 @@ struct PCII440FXState {
MemoryRegion *system_memory;
MemoryRegion *pci_address_space;
MemoryRegion *ram_memory;
MemoryRegion pci_hole;
MemoryRegion pci_hole_64bit;
PAMMemoryRegion pam_regions[13];
MemoryRegion smram_region;
uint8_t smm_enabled;
@ -313,8 +311,6 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state,
MemoryRegion *address_space_mem,
MemoryRegion *address_space_io,
ram_addr_t ram_size,
hwaddr pci_hole_start,
hwaddr pci_hole_size,
ram_addr_t above_4g_mem_size,
MemoryRegion *pci_address_space,
MemoryRegion *ram_memory)
@ -327,7 +323,6 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state,
PCII440FXState *f;
unsigned i;
I440FXState *i440fx;
uint64_t pci_hole64_size;
dev = qdev_create(NULL, TYPE_I440FX_PCI_HOST_BRIDGE);
s = PCI_HOST_BRIDGE(dev);
@ -355,23 +350,10 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state,
i440fx->pci_info.w32.begin = 0xe0000000;
}
memory_region_init_alias(&f->pci_hole, OBJECT(d), "pci-hole", f->pci_address_space,
pci_hole_start, pci_hole_size);
memory_region_add_subregion(f->system_memory, pci_hole_start, &f->pci_hole);
/* setup pci memory mapping */
pc_pci_as_mapping_init(OBJECT(f), f->system_memory,
f->pci_address_space);
pci_hole64_size = pci_host_get_hole64_size(i440fx->pci_hole64_size);
pc_init_pci64_hole(&i440fx->pci_info, 0x100000000ULL + above_4g_mem_size,
pci_hole64_size);
memory_region_init_alias(&f->pci_hole_64bit, OBJECT(d), "pci-hole64",
f->pci_address_space,
i440fx->pci_info.w64.begin,
pci_hole64_size);
if (pci_hole64_size) {
memory_region_add_subregion(f->system_memory,
i440fx->pci_info.w64.begin,
&f->pci_hole_64bit);
}
memory_region_init_alias(&f->smram_region, OBJECT(d), "smram-region",
f->pci_address_space, 0xa0000, 0x20000);
memory_region_add_subregion_overlap(f->system_memory, 0xa0000,