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cirrus_vga: adapt to memory mutators API 

Simplify the code by avoiding dynamic creation and destruction of
memory regions.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2011-12-04 19:49:22 +02:00
parent e87c099f1c
commit 7969d9ed5c
1 changed files with 16 additions and 32 deletions
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48
hw/cirrus_vga.c
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@ -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)) {
&& !(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);
}
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,