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Fixed Cirrus Logic MMIO mapping. Fixes hang when opening Windows 9x DOS box.

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This commit is contained in:
SarahW 2018-02-21 22:04:54 +00:00
commit e349e4b14e
1 changed files with 194 additions and 131 deletions
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87
src/vid_cl5429.c
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@ -60,10 +60,16 @@ typedef struct gd5429_t
int card;
uint32_t lfb_base;
int mmio_vram_overlap;
} gd5429_t;
void gd5429_mmio_write(uint32_t addr, uint8_t val, void *p);
uint8_t gd5429_mmio_read(uint32_t addr, void *p);
static void gd5429_mmio_write(uint32_t addr, uint8_t val, void *p);
static void gd5429_mmio_writew(uint32_t addr, uint16_t val, void *p);
static void gd5429_mmio_writel(uint32_t addr, uint32_t val, void *p);
static uint8_t gd5429_mmio_read(uint32_t addr, void *p);
static uint16_t gd5429_mmio_readw(uint32_t addr, void *p);
static uint32_t gd5429_mmio_readl(uint32_t addr, void *p);
void gd5429_blt_write_w(uint32_t addr, uint16_t val, void *p);
void gd5429_blt_write_l(uint32_t addr, uint32_t val, void *p);
@ -383,6 +389,8 @@ void gd5429_recalc_mapping(gd5429_t *gd5429)
return;
}
gd5429->mmio_vram_overlap = 0;
// pclog("Write mapping %02X %i\n", svga->gdcreg[6], svga->seqregs[0x17] & 0x04);
if (!(svga->seqregs[7] & 0xf0))
{
@ -391,26 +399,26 @@ void gd5429_recalc_mapping(gd5429_t *gd5429)
{
case 0x0: /*128k at A0000*/
mem_mapping_set_addr(&svga->mapping, 0xa0000, 0x10000);
mem_mapping_disable(&gd5429->mmio_mapping);
svga->banked_mask = 0xffff;
break;
case 0x4: /*64k at A0000*/
mem_mapping_set_addr(&svga->mapping, 0xa0000, 0x10000);
if (svga->seqregs[0x17] & 0x04)
mem_mapping_set_addr(&gd5429->mmio_mapping, 0xb8000, 0x00100);
svga->banked_mask = 0xffff;
break;
case 0x8: /*32k at B0000*/
mem_mapping_set_addr(&svga->mapping, 0xb0000, 0x08000);
mem_mapping_disable(&gd5429->mmio_mapping);
svga->banked_mask = 0x7fff;
break;
case 0xC: /*32k at B8000*/
mem_mapping_set_addr(&svga->mapping, 0xb8000, 0x08000);
mem_mapping_disable(&gd5429->mmio_mapping);
svga->banked_mask = 0x7fff;
gd5429->mmio_vram_overlap = 1;
break;
}
if (svga->seqregs[0x17] & 0x04)
mem_mapping_set_addr(&gd5429->mmio_mapping, 0xb8000, 0x00100);
else
mem_mapping_disable(&gd5429->mmio_mapping);
}
else
{
@ -1283,10 +1291,12 @@ void gd5429_start_blit(uint32_t cpu_dat, int count, void *p)
}
}
void gd5429_mmio_write(uint32_t addr, uint8_t val, void *p)
static void gd5429_mmio_write(uint32_t addr, uint8_t val, void *p)
{
gd5429_t *gd5429 = (gd5429_t *)p;
if ((addr & ~0xff) == 0xb8000)
{
// pclog("MMIO write %08X %02X\n", addr, val);
switch (addr & 0xff)
{
@ -1411,11 +1421,40 @@ void gd5429_mmio_write(uint32_t addr, uint8_t val, void *p)
break;
}
}
uint8_t gd5429_mmio_read(uint32_t addr, void *p)
else if (gd5429->mmio_vram_overlap)
gd5429_write(addr, val, gd5429);
}
static void gd5429_mmio_writew(uint32_t addr, uint16_t val, void *p)
{
// gd5429_t *gd5429 = (gd5429_t *)p;
gd5429_t *gd5429 = (gd5429_t *)p;
if ((addr & ~0xff) == 0xb8000)
{
gd5429_mmio_write(addr, val & 0xff, gd5429);
gd5429_mmio_write(addr + 1, val >> 8, gd5429);
}
else if (gd5429->mmio_vram_overlap)
gd5429_writew(addr, val, gd5429);
}
static void gd5429_mmio_writel(uint32_t addr, uint32_t val, void *p)
{
gd5429_t *gd5429 = (gd5429_t *)p;
if ((addr & ~0xff) == 0xb8000)
{
gd5429_mmio_writew(addr, val & 0xffff, gd5429);
gd5429_mmio_writew(addr + 2, val >> 16, gd5429);
}
else if (gd5429->mmio_vram_overlap)
gd5429_writel(addr, val, gd5429);
}
static uint8_t gd5429_mmio_read(uint32_t addr, void *p)
{
gd5429_t *gd5429 = (gd5429_t *)p;
if ((addr & ~0xff) == 0xb8000)
{
// pclog("MMIO read %08X\n", addr);
switch (addr & 0xff)
{
@ -1424,6 +1463,30 @@ uint8_t gd5429_mmio_read(uint32_t addr, void *p)
}
return 0xff; /*All other registers read-only*/
}
if (gd5429->mmio_vram_overlap)
return gd5429_read(addr, gd5429);
return 0xff;
}
static uint16_t gd5429_mmio_readw(uint32_t addr, void *p)
{
gd5429_t *gd5429 = (gd5429_t *)p;
if ((addr & ~0xff) == 0xb8000)
return gd5429_mmio_read(addr, gd5429) | (gd5429_mmio_read(addr+1, gd5429) << 8);
if (gd5429->mmio_vram_overlap)
return gd5429_readw(addr, gd5429);
return 0xffff;
}
static uint32_t gd5429_mmio_readl(uint32_t addr, void *p)
{
gd5429_t *gd5429 = (gd5429_t *)p;
if ((addr & ~0xff) == 0xb8000)
return gd5429_mmio_readw(addr, gd5429) | (gd5429_mmio_readw(addr+2, gd5429) << 16);
if (gd5429->mmio_vram_overlap)
return gd5429_readl(addr, gd5429);
return 0xffffffff;
}
void gd5429_blt_write_w(uint32_t addr, uint16_t val, void *p)
{
@ -1555,7 +1618,7 @@ static void *cl_init(int type, char *fn)
mem_mapping_set_handler(&gd5429->svga.mapping, gd5429_read, gd5429_readw, gd5429_readl, gd5429_write, gd5429_writew, gd5429_writel);
mem_mapping_set_p(&gd5429->svga.mapping, gd5429);
mem_mapping_add(&gd5429->mmio_mapping, 0, 0, gd5429_mmio_read, NULL, NULL, gd5429_mmio_write, NULL, NULL, NULL, 0, gd5429);
mem_mapping_add(&gd5429->mmio_mapping, 0, 0, gd5429_mmio_read, gd5429_mmio_readw, gd5429_mmio_readl, gd5429_mmio_write, gd5429_mmio_writew, gd5429_mmio_writel, NULL, 0, gd5429);
mem_mapping_add(&gd5429->linear_mapping, 0, 0, svga_read_linear, svga_readw_linear, svga_readl_linear, gd5429_writeb_linear, gd5429_writew_linear, gd5429_writel_linear, NULL, 0, svga);
io_sethandler(0x03c0, 0x0020, gd5429_in, NULL, NULL, gd5429_out, NULL, NULL, gd5429);