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hw/pci-host/astro: Implement LMMIO registers

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Add code to adjust the memory mapping windows according to the LMMIO registers
in Astro.  This allows SeaBIOS-hppa to configure Astro depending on existing
PCI cards, and especially makes it possible to enable a VGA PCI card.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller
2026-03-29 00:26:14 +01:00
parent 64f676beea
commit 4f5367f0a2
2 changed files with 81 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

84
hw/pci-host/astro.c
View File

@@ -530,6 +530,78 @@ static ElroyState *elroy_init(int num)
* Astro Runway chip.
*/
static void adjust_LMMIO_mapping(AstroState *s)
{
MemoryRegion *lmmio;
uint64_t map_addr, map_size, align_mask;
uint32_t map_route, map_enabled, i;
lmmio = &s->lmmio;
/* read LMMIO distributed route and calculate size */
map_route = s->ioc_ranges[(0x370 - 0x300) / 8] >> 58;
map_route = MIN(MAX(map_route, 20), 23);
/* calculate size of each mapping, sum of all is 8-64 MB */
map_size = 1ULL << map_route;
align_mask = ~(map_size - 1);
/* read LMMIO_DIST_BASE for mapping address */
map_addr = s->ioc_ranges[(0x360 - 0x300) / 8];
map_enabled = map_addr & 1;
map_addr &= MAKE_64BIT_MASK(24, 5);
map_addr |= MAKE_64BIT_MASK(29, 36);
map_addr &= align_mask;
s->ioc_ranges[(0x360 - 0x300) / 8] = map_addr | map_enabled;
/* make sure the lmmio region is initially turned off */
if (lmmio->enabled) {
memory_region_set_enabled(lmmio, false);
}
/* exit if range is not enabled */
if (!map_enabled) {
return;
}
if (!lmmio->name) {
memory_region_init_io(lmmio, OBJECT(s), &unassigned_io_ops, s,
"LMMIO", ROPES_PER_IOC * map_size);
memory_region_add_subregion_overlap(get_system_memory(),
map_addr, lmmio, 1);
}
memory_region_set_address(lmmio, map_addr);
memory_region_set_size(lmmio, ROPES_PER_IOC * map_size);
memory_region_set_enabled(lmmio, true);
for (i = 0; i < ELROY_NUM; i++) {
MemoryRegion *alias;
ElroyState *elroy;
int rope;
elroy = s->elroy[i];
alias = &elroy->lmmio_alias;
rope = elroy_rope_nr[i];
if (alias->enabled) {
memory_region_set_enabled(alias, false);
}
if (!alias->name) {
memory_region_init_alias(alias, OBJECT(elroy),
"lmmio-alias", &elroy->pci_mmio, 0, map_size);
memory_region_add_subregion_overlap(lmmio, rope * map_size,
alias, 2);
}
memory_region_set_address(alias, rope * map_size);
memory_region_set_alias_offset(alias,
(uint32_t) (map_addr + rope * map_size));
memory_region_set_size(alias, map_size);
memory_region_set_enabled(alias, true);
}
}
static void adjust_LMMIO_DIRECT_mapping(AstroState *s, unsigned int reg_index)
{
MemoryRegion *lmmio_alias;
@@ -689,6 +761,9 @@ static MemTxResult astro_chip_write_with_attrs(void *opaque, hwaddr addr,
if (index < LMMIO_DIRECT_RANGES * 3) {
adjust_LMMIO_DIRECT_mapping(s, index);
}
if (addr >= 0x360 && addr <= 0x370 + 7) {
adjust_LMMIO_mapping(s);
}
break;
case 0x10200:
case 0x10220:
@@ -892,15 +967,6 @@ static void astro_realize(DeviceState *obj, Error **errp)
elroy->mmio_base[(0x0240 - 0x200) / 8] = rope * map_size | 0x01;
elroy->mmio_base[(0x0248 - 0x200) / 8] = 0x0000e000;
/* map elroys mmio */
map_size = LMMIO_DIST_BASE_SIZE / ROPES_PER_IOC;
map_addr = F_EXTEND(LMMIO_DIST_BASE_ADDR + rope * map_size);
memory_region_init_alias(&elroy->pci_mmio_alias, OBJECT(elroy),
"pci-mmio-alias",
&elroy->pci_mmio, (uint32_t) map_addr, map_size);
memory_region_add_subregion(get_system_memory(), map_addr,
&elroy->pci_mmio_alias);
/* map elroys io */
map_size = IOS_DIST_BASE_SIZE / ROPES_PER_IOC;
map_addr = F_EXTEND(IOS_DIST_BASE_ADDR + rope * map_size);

8
include/hw/pci-host/astro.h
View File

@@ -61,9 +61,10 @@ struct ElroyState {
MemoryRegion this_mem;
MemoryRegion pci_mmio;
MemoryRegion pci_mmio_alias;
MemoryRegion pci_hole;
MemoryRegion pci_io;
MemoryRegion gmmio_alias;
MemoryRegion lmmio_alias;
};
struct AstroState {
@@ -89,6 +90,9 @@ struct AstroState {
MemoryRegion this_mem;
MemoryRegion lmmio_direct[LMMIO_DIRECT_RANGES];
MemoryRegion lmmio;
MemoryRegion gmmio;
IOMMUMemoryRegion iommu;
AddressSpace iommu_as;
};