platinum: implement video controller registers.

devices/memctrl/platinum.cpp

@@ -19,12 +19,14 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-/** Platinum Memory Controller emulation. */
+/** Platinum Memory/Display Controller emulation. */
 
-#include "platinum.h"
+#include <devices/memctrl/platinum.h>
+#include <devices/video/displayid.h>
 #include <loguru.hpp>
 
 #include <cinttypes>
+#include <memory>
 
 using namespace Platinum;
 
@@ -35,9 +37,17 @@ PlatinumCtrl::PlatinumCtrl() : MemCtrlBase()
     // add MMIO region for the configuration and status registers
     add_mmio_region(0xF8000000, 0x500, this);
 
+    // determine actual VRAM size (min. 1MB, max. 4MB)
+    this->vram_size = 1 << 20;
+
+    // insert video memory region into the main memory map
+    this->add_ram_region(0xF1000000UL, this->vram_size);
+
     // initialize the CPUID register with the following CPU:
     // PowerPC 601 @ 75 MHz, bus frequency: 37,5 MHz
     this->cpu_id = (0x3001 << 16) | ClkSrc3 | (CpuSpeed3::CPU_75_BUS_38 << 8);
+
+    this->display_id = std::unique_ptr<DisplayID> (new DisplayID());
 }
 
 uint32_t PlatinumCtrl::read(uint32_t reg_start, uint32_t offset, int size)
@@ -63,6 +73,11 @@ uint32_t PlatinumCtrl::read(uint32_t reg_start, uint32_t offset, int size)
         return this->bank_base[(offset - PlatinumReg::BANK_0_BASE) >> 4];
     case PlatinumReg::CACHE_CONFIG:
         return 0; // report no L2 cache installed
+    case PlatinumReg::FB_BASE_ADDR:
+        return this->fb_addr;
+    case PlatinumReg::MON_ID_SENSE:
+        LOG_F(INFO, "Platinum: display sense read");
+        return (this->cur_mon_id ^ 7);
     default:
         LOG_F(WARNING, "Platinum: unknown register read at offset 0x%X", offset);
     }
@@ -82,12 +97,6 @@ void PlatinumCtrl::write(uint32_t rgn_start, uint32_t offset, uint32_t value, in
     case PlatinumReg::DRAM_REFRESH:
         this->dram_refresh = value;
         break;
-    case PlatinumReg::FB_CONFIG_2:
-        this->fb_config_2 = value;
-        break;
-    case PlatinumReg::VRAM_REFRESH:
-        this->vram_refresh = value;
-        break;
     case PlatinumReg::BANK_0_BASE:
     case PlatinumReg::BANK_1_BASE:
     case PlatinumReg::BANK_2_BASE:
@@ -98,6 +107,50 @@ void PlatinumCtrl::write(uint32_t rgn_start, uint32_t offset, uint32_t value, in
     case PlatinumReg::BANK_7_BASE:
         this->bank_base[(offset - PlatinumReg::BANK_0_BASE) >> 4] = value;
         break;
+    case PlatinumReg::FB_BASE_ADDR:
+        this->fb_addr = value;
+        LOG_F(INFO, "Platinum: Framebuffer address set to 0x%X", value);
+        break;
+    case PlatinumReg::FB_CONFIG_1:
+        this->fb_config_1 = value;
+        break;
+    case PlatinumReg::FB_CONFIG_2:
+        this->fb_config_2 = value;
+        break;
+    case PlatinumReg::VMEM_PAGE_MODE:
+        this->vmem_fp_mode = value;
+        break;
+    case PlatinumReg::MON_ID_SENSE:
+        LOG_F(INFO, "Platinum: display sense written with 0x%X", value);
+        this->cur_mon_id = this->display_id->read_monitor_sense(value & 7, value ^ 7);
+        break;
+    case PlatinumReg::FB_RESET:
+        this->fb_reset = value;
+        break;
+    case PlatinumReg::VRAM_REFRESH:
+        this->vram_refresh = value;
+        break;
+    case PlatinumReg::SWATCH_CONFIG:
+        this->swatch_config = value;
+        break;
+    case PlatinumReg::SWATCH_INT_MASK:
+        this->swatch_int_mask = value;
+        break;
+    case PlatinumReg::SWATCH_HAL:
+        LOG_F(INFO, "Swatch HAL set to 0x%X", value);
+        break;
+    case PlatinumReg::SWATCH_HFP:
+        LOG_F(INFO, "Swatch HFP set to 0x%X", value);
+        break;
+    case PlatinumReg::SWATCH_HPIX:
+        LOG_F(INFO, "Swatch HPIX set to 0x%X", value);
+        break;
+    case PlatinumReg::SWATCH_VAL:
+        LOG_F(INFO, "Swatch VAL set to 0x%X", value);
+        break;
+    case PlatinumReg::SWATCH_VFP:
+        LOG_F(INFO, "Swatch VFP set to 0x%X", value);
+        break;
     default:
         LOG_F(WARNING, "Platinum: unknown register write at offset 0x%X", offset);
     }

devices/memctrl/platinum.h

@@ -33,8 +33,10 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <devices/common/hwcomponent.h>
 #include <devices/common/mmiodevice.h>
 #include <devices/memctrl/memctrlbase.h>
+#include <devices/video/displayid.h>
 
 #include <cinttypes>
+#include <memory>
 
 namespace Platinum {
 
@@ -117,9 +119,21 @@ enum PlatinumReg : uint32_t {
     BANK_7_BASE     = 0x0D0,
     GP_SW_SCRATCH   = 0x0E0,
     PCI_ADDR_MASK   = 0x0F0,
+    FB_BASE_ADDR    = 0x100,
     FB_CONFIG_1     = 0x140,
     FB_CONFIG_2     = 0x150,
+    VMEM_PAGE_MODE  = 0x160,
+    MON_ID_SENSE    = 0x170,
+    FB_RESET        = 0x180,
     VRAM_REFRESH    = 0x1B0,
+    SWATCH_CONFIG   = 0x200,
+    SWATCH_INT_MASK = 0x210,
+    SWATCH_HAL      = 0x300,
+    SWATCH_HFP      = 0x310,
+    SWATCH_HPIX     = 0x320,
+    SWATCH_VAL      = 0x370,
+    SWATCH_VFP      = 0x380,
+    IRIDIUM_CONFIG  = 0x4A0,
 };
 
 enum {
@@ -132,6 +146,13 @@ enum {
     DRAM_CAP_128MB  = (1 << 27),
 };
 
+// FB_RESET register bits.
+enum {
+    VRAM_SM_RESET     = (1 << 0), // VRAM state machine reset
+    VREFRESH_SM_RESET = (1 << 1), // Video refresh state machine reset
+    SWATCH_RESET      = (1 << 2), // Swatch reset
+};
+
 }; // namespace Platinum
 
 class PlatinumCtrl : public MemCtrlBase, public MMIODevice {
@@ -158,10 +179,24 @@ private:
     uint32_t    rom_timing   = 0;
     uint32_t    dram_timing  = 0xEFF;
     uint32_t    dram_refresh = 0x1F4;
-    uint32_t    fb_config_2  = 0x1FFF;
-    uint32_t    vram_refresh = 0x1F4;
     uint32_t    bank_base[8];
     uint32_t    bank_size[8] = { 0 };
+
+    // display controller state
+    uint32_t    fb_addr       = 0xF1000000;
+    uint32_t    fb_config_1   = 0x1F00;
+    uint32_t    fb_config_2   = 0x1FFF;
+    uint32_t    fb_reset      = 7;
+    uint32_t    vram_refresh  = 0x1F4;
+    uint32_t    vram_size     = 0;
+    uint8_t     vmem_fp_mode  = 0;
+    uint8_t     cur_mon_id    = 0;
+
+    // video timing generator (Swatch) state
+    uint32_t    swatch_config   = 0xFFD;
+    uint32_t    swatch_int_mask = 0;
+
+    std::unique_ptr<DisplayID>  display_id;
 };
 
 #endif // PLATINUM_MEMCTRL_H

machines/machinefactory.cpp

@@ -83,7 +83,7 @@ static const PropMap CatalystSettings = {
     {"gfxmem_size",
         new IntProperty( 1, vector<uint32_t>({1, 2, 4}))},
     {"mon_id",
-        new StrProperty("")},
+        new StrProperty("HiRes12-14in")},
     {"fdd_img",
         new StrProperty("")},
     {"serial_backend", new StrProperty("null", CharIoBackends)},