ati-vga: Fix aperture sizes

Apparently these should be half the memory region sizes confirmed at
least by Radeon FCocde ROM while Rage 128 Pro ROMs don't seem to use
these. Linux r100 DRM driver also checks for a bit in HOST_PATH_CNTL
so we also add that even though the FCode ROM does not seem to set it.

Signed-off-by: BALATON Zoltan <[email protected]>
Reviewed-by: Marc-André Lureau <[email protected]>
Message-ID: <d077d4f90d19db731df78da6f05058db074cada1.1698871239.git.balaton@eik.bme.hu>

Author: zbalaton

hw/display/ati.c

@@ -349,14 +349,17 @@ static uint64_t ati_mm_read(void *opaque, hwaddr addr, unsigned int size)
                                       PCI_BASE_ADDRESS_0, size) & 0xfffffff0;
         break;
     case CONFIG_APER_SIZE:
-        val = s->vga.vram_size;
+        val = s->vga.vram_size / 2;
         break;
     case CONFIG_REG_1_BASE:
         val = pci_default_read_config(&s->dev,
                                       PCI_BASE_ADDRESS_2, size) & 0xfffffff0;
         break;
     case CONFIG_REG_APER_SIZE:
-        val = memory_region_size(&s->mm);
+        val = memory_region_size(&s->mm) / 2;
+        break;
+    case HOST_PATH_CNTL:
+        val = BIT(23); /* Radeon HDP_APER_CNTL */
         break;
     case MC_STATUS:
         val = 5;

hw/display/ati_dbg.c

@@ -38,6 +38,7 @@ static struct ati_regdesc ati_reg_names[] = {
     {"CONFIG_APER_SIZE", 0x0108},
     {"CONFIG_REG_1_BASE", 0x010c},
     {"CONFIG_REG_APER_SIZE", 0x0110},
+    {"HOST_PATH_CNTL", 0x0130},
     {"MEM_CNTL", 0x0140},
     {"MC_FB_LOCATION", 0x0148},
     {"MC_AGP_LOCATION", 0x014C},

hw/display/ati_regs.h

@@ -56,6 +56,7 @@
 #define CONFIG_APER_SIZE                        0x0108
 #define CONFIG_REG_1_BASE                       0x010c
 #define CONFIG_REG_APER_SIZE                    0x0110
+#define HOST_PATH_CNTL                          0x0130
 #define MEM_CNTL                                0x0140
 #define MC_FB_LOCATION                          0x0148
 #define MC_AGP_LOCATION                         0x014C