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gt64xxx: remove isa_mem_base usage 

Create a custom address space for PCI memory region and use it for the PCI bus.
Dynamically handle PCI0 Mem0 and PCI0 Mem1 regions, as already done for PCI0 IO.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
This commit is contained in:
Hervé Poussineau 2015-02-01 09:12:55 +01:00 committed by Leon Alrae
parent cdba1415c1
commit f720f20350
1 changed files with 68 additions and 27 deletions
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95
hw/mips/gt64xxx_pci.c
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@ -239,7 +239,11 @@ typedef struct GT64120State {
uint32_t regs[GT_REGS];
PCI_MAPPING_ENTRY(PCI0IO);
PCI_MAPPING_ENTRY(PCI0M0);
PCI_MAPPING_ENTRY(PCI0M1);
PCI_MAPPING_ENTRY(ISD);
MemoryRegion pci0_mem;
AddressSpace pci0_mem_as;
} GT64120State;
/* Adjust range to avoid touching space which isn't mappable via PCI */
@ -290,25 +294,63 @@ static void gt64120_isd_mapping(GT64120State *s)
static void gt64120_pci_mapping(GT64120State *s)
{
/* Update IO mapping */
if ((s->regs[GT_PCI0IOLD] & 0x7f) <= s->regs[GT_PCI0IOHD])
{
/* Unmap old IO address */
if (s->PCI0IO_length)
{
memory_region_del_subregion(get_system_memory(), &s->PCI0IO_mem);
object_unparent(OBJECT(&s->PCI0IO_mem));
}
/* Map new IO address */
s->PCI0IO_start = s->regs[GT_PCI0IOLD] << 21;
s->PCI0IO_length = ((s->regs[GT_PCI0IOHD] + 1) - (s->regs[GT_PCI0IOLD] & 0x7f)) << 21;
isa_mem_base = s->PCI0IO_start;
if (s->PCI0IO_length) {
memory_region_init_alias(&s->PCI0IO_mem, OBJECT(s), "isa_mmio",
get_system_io(), 0, s->PCI0IO_length);
memory_region_add_subregion(get_system_memory(), s->PCI0IO_start,
&s->PCI0IO_mem);
}
/* Update PCI0IO mapping */
if ((s->regs[GT_PCI0IOLD] & 0x7f) <= s->regs[GT_PCI0IOHD]) {
/* Unmap old IO address */
if (s->PCI0IO_length) {
memory_region_del_subregion(get_system_memory(), &s->PCI0IO_mem);
object_unparent(OBJECT(&s->PCI0IO_mem));
}
/* Map new IO address */
s->PCI0IO_start = s->regs[GT_PCI0IOLD] << 21;
s->PCI0IO_length = ((s->regs[GT_PCI0IOHD] + 1) -
(s->regs[GT_PCI0IOLD] & 0x7f)) << 21;
if (s->PCI0IO_length) {
memory_region_init_alias(&s->PCI0IO_mem, OBJECT(s), "pci0-io",
get_system_io(), 0, s->PCI0IO_length);
memory_region_add_subregion(get_system_memory(), s->PCI0IO_start,
&s->PCI0IO_mem);
}
}
/* Update PCI0M0 mapping */
if ((s->regs[GT_PCI0M0LD] & 0x7f) <= s->regs[GT_PCI0M0HD]) {
/* Unmap old MEM address */
if (s->PCI0M0_length) {
memory_region_del_subregion(get_system_memory(), &s->PCI0M0_mem);
object_unparent(OBJECT(&s->PCI0M0_mem));
}
/* Map new mem address */
s->PCI0M0_start = s->regs[GT_PCI0M0LD] << 21;
s->PCI0M0_length = ((s->regs[GT_PCI0M0HD] + 1) -
(s->regs[GT_PCI0M0LD] & 0x7f)) << 21;
if (s->PCI0M0_length) {
memory_region_init_alias(&s->PCI0M0_mem, OBJECT(s), "pci0-mem0",
&s->pci0_mem, s->PCI0M0_start,
s->PCI0M0_length);
memory_region_add_subregion(get_system_memory(), s->PCI0M0_start,
&s->PCI0M0_mem);
}
}
/* Update PCI0M1 mapping */
if ((s->regs[GT_PCI0M1LD] & 0x7f) <= s->regs[GT_PCI0M1HD]) {
/* Unmap old MEM address */
if (s->PCI0M1_length) {
memory_region_del_subregion(get_system_memory(), &s->PCI0M1_mem);
object_unparent(OBJECT(&s->PCI0M1_mem));
}
/* Map new mem address */
s->PCI0M1_start = s->regs[GT_PCI0M1LD] << 21;
s->PCI0M1_length = ((s->regs[GT_PCI0M1HD] + 1) -
(s->regs[GT_PCI0M1LD] & 0x7f)) << 21;
if (s->PCI0M1_length) {
memory_region_init_alias(&s->PCI0M1_mem, OBJECT(s), "pci0-mem1",
&s->pci0_mem, s->PCI0M1_start,
s->PCI0M1_length);
memory_region_add_subregion(get_system_memory(), s->PCI0M1_start,
&s->PCI0M1_mem);
}
}
}
@ -363,10 +405,12 @@ static void gt64120_writel (void *opaque, hwaddr addr,
case GT_PCI0M0LD:
s->regs[GT_PCI0M0LD] = val & 0x00007fff;
s->regs[GT_PCI0M0REMAP] = val & 0x000007ff;
gt64120_pci_mapping(s);
break;
case GT_PCI0M1LD:
s->regs[GT_PCI0M1LD] = val & 0x00007fff;
s->regs[GT_PCI0M1REMAP] = val & 0x000007ff;
gt64120_pci_mapping(s);
break;
case GT_PCI1IOLD:
s->regs[GT_PCI1IOLD] = val & 0x00007fff;
@ -380,12 +424,12 @@ static void gt64120_writel (void *opaque, hwaddr addr,
s->regs[GT_PCI1M1LD] = val & 0x00007fff;
s->regs[GT_PCI1M1REMAP] = val & 0x000007ff;
break;
case GT_PCI0M0HD:
case GT_PCI0M1HD:
case GT_PCI0IOHD:
s->regs[saddr] = val & 0x0000007f;
gt64120_pci_mapping(s);
break;
case GT_PCI0M0HD:
case GT_PCI0M1HD:
case GT_PCI1IOHD:
case GT_PCI1M0HD:
case GT_PCI1M1HD:
@ -1124,10 +1168,12 @@ PCIBus *gt64120_register(qemu_irq *pic)
qdev_init_nofail(dev);
d = GT64120_PCI_HOST_BRIDGE(dev);
phb = PCI_HOST_BRIDGE(dev);
memory_region_init(&d->pci0_mem, OBJECT(dev), "pci0-mem", UINT32_MAX);
address_space_init(&d->pci0_mem_as, &d->pci0_mem, "pci0-mem");
phb->bus = pci_register_bus(dev, "pci",
gt64120_pci_set_irq, gt64120_pci_map_irq,
pic,
get_system_memory(),
&d->pci0_mem,
get_system_io(),
PCI_DEVFN(18, 0), 4, TYPE_PCI_BUS);
memory_region_init_io(&d->ISD_mem, OBJECT(dev), &isd_mem_ops, d, "isd-mem", 0x1000);
@ -1142,11 +1188,6 @@ static int gt64120_init(SysBusDevice *dev)
s = GT64120_PCI_HOST_BRIDGE(dev);
/* FIXME: This value is computed from registers during reset, but some
devices (e.g. VGA card) need to know it when they are registered.
This also mean that changing the register to change the mapping
does not fully work. */
isa_mem_base = 0x10000000;
qemu_register_reset(gt64120_reset, s);
return 0;
}