From: BALATON Zoltan <balaton@eik.bme.hu>

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 <balaton@eik.bme.hu>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <d077d4f90d19db731df78da6f05058db074cada1.1698871239.git.balaton@eik.bme.hu>
---
 hw/display/ati_regs.h | 1 +
 hw/display/ati.c      | 7 +++++--
 hw/display/ati_dbg.c  | 1 +
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/hw/display/ati_regs.h b/hw/display/ati_regs.h
index d6282b2ef2..c697b328da 100644
--- a/hw/display/ati_regs.h
+++ b/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
diff --git a/hw/display/ati.c b/hw/display/ati.c
index 6e38e00502..9a9ea754bd 100644
--- a/hw/display/ati.c
+++ b/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;
diff --git a/hw/display/ati_dbg.c b/hw/display/ati_dbg.c
index bd0ecd48c7..4aec1c383a 100644
--- a/hw/display/ati_dbg.c
+++ b/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},
-- 
2.41.0