diff options
| -rw-r--r-- | hw/cirrus_vga.c | 50 |
1 files changed, 17 insertions, 33 deletions
diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c index c7e365b..9f7fea1 100644 --- a/hw/cirrus_vga.c +++ b/hw/cirrus_vga.c @@ -205,7 +205,7 @@ typedef struct CirrusVGAState { bool linear_vram; /* vga.vram mapped over cirrus_linear_io */ MemoryRegion low_mem_container; /* container for 0xa0000-0xc0000 */ MemoryRegion low_mem; /* always mapped, overridden by: */ - MemoryRegion *cirrus_bank[2]; /* aliases at 0xa0000-0xb0000 */ + MemoryRegion cirrus_bank[2]; /* aliases at 0xa0000-0xb0000 */ uint32_t cirrus_addr_mask; uint32_t linear_mmio_mask; uint8_t cirrus_shadow_gr0; @@ -2363,40 +2363,16 @@ static const MemoryRegionOps cirrus_linear_bitblt_io_ops = { }, }; -static void unmap_bank(CirrusVGAState *s, unsigned bank) -{ - if (s->cirrus_bank[bank]) { - memory_region_del_subregion(&s->low_mem_container, - s->cirrus_bank[bank]); - memory_region_destroy(s->cirrus_bank[bank]); - g_free(s->cirrus_bank[bank]); - s->cirrus_bank[bank] = NULL; - } -} - static void map_linear_vram_bank(CirrusVGAState *s, unsigned bank) { - MemoryRegion *mr; - static const char *names[] = { "vga.bank0", "vga.bank1" }; - - if (!(s->cirrus_srcptr != s->cirrus_srcptr_end) + MemoryRegion *mr = &s->cirrus_bank[bank]; + bool enabled = !(s->cirrus_srcptr != s->cirrus_srcptr_end) && !((s->vga.sr[0x07] & 0x01) == 0) && !((s->vga.gr[0x0B] & 0x14) == 0x14) - && !(s->vga.gr[0x0B] & 0x02)) { - - mr = g_malloc(sizeof(*mr)); - memory_region_init_alias(mr, names[bank], &s->vga.vram, - s->cirrus_bank_base[bank], 0x8000); - memory_region_add_subregion_overlap( - &s->low_mem_container, - 0x8000 * bank, - mr, - 1); - unmap_bank(s, bank); - s->cirrus_bank[bank] = mr; - } else { - unmap_bank(s, bank); - } + && !(s->vga.gr[0x0B] & 0x02); + + memory_region_set_enabled(mr, enabled); + memory_region_set_alias_offset(mr, s->cirrus_bank_base[bank]); } static void map_linear_vram(CirrusVGAState *s) @@ -2415,8 +2391,8 @@ static void unmap_linear_vram(CirrusVGAState *s) s->linear_vram = false; memory_region_del_subregion(&s->pci_bar, &s->vga.vram); } - unmap_bank(s, 0); - unmap_bank(s, 1); + memory_region_set_enabled(&s->cirrus_bank[0], false); + memory_region_set_enabled(&s->cirrus_bank[1], false); } /* Compute the memory access functions */ @@ -2856,6 +2832,14 @@ static void cirrus_init_common(CirrusVGAState * s, int device_id, int is_pci, memory_region_init_io(&s->low_mem, &cirrus_vga_mem_ops, s, "cirrus-low-memory", 0x20000); memory_region_add_subregion(&s->low_mem_container, 0, &s->low_mem); + for (i = 0; i < 2; ++i) { + static const char *names[] = { "vga.bank0", "vga.bank1" }; + MemoryRegion *bank = &s->cirrus_bank[i]; + memory_region_init_alias(bank, names[i], &s->vga.vram, 0, 0x8000); + memory_region_set_enabled(bank, false); + memory_region_add_subregion_overlap(&s->low_mem_container, i * 0x8000, + bank, 1); + } memory_region_add_subregion_overlap(system_memory, isa_mem_base + 0x000a0000, &s->low_mem_container, |