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dingusppc/devices/memctrl/platinum.h

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/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-24 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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 definitions.
Author: Max Poliakovski
Platinum is a single-chip memory and video subsystem controller designed
especially for the Power Macintosh 7200 computer, code name Catalyst.
*/
#ifndef PLATINUM_MEMCTRL_H
#define PLATINUM_MEMCTRL_H
#include <devices/common/hwcomponent.h>
#include <devices/common/mmiodevice.h>
#include <devices/memctrl/memctrlbase.h>
#include <devices/video/appleramdac.h>
#include <devices/video/displayid.h>
#include <devices/video/videoctrl.h>
#include <cinttypes>
#include <memory>
namespace Platinum {
/** Clock source encoding in the CPUID register */
enum {
ClkSrc0 = 0x0000, // 33 MHz
ClkSrc2 = 0x8000, // 20 MHz
ClkSrc3 = 0x8040 // 31,3344 MHz
};
/** CPU/Bus speed encoding for ClkSrc0 */
enum CpuSpeed0 {
CPU_66_BUS_33 = 0,
CPU_80_BUS_40_1 = 1,
CPU_80_BUS_27_1 = 2,
CPU_100_BUS_50 = 3,
CPU_100_BUS_33 = 4,
CPU_120_BUS_60 = 5,
CPU_120_BUS_40 = 6,
CPU_120_BUS_30 = 7,
CPU_133_BUS_66 = 8,
CPU_133_BUS_44 = 9,
CPU_133_BUS_33 = 10,
CPU_150_BUS_75 = 11,
CPU_150_BUS_50 = 12,
CPU_150_BUS_37 = 13
};
/** CPU/Bus speed encoding for ClkSrc2 */
enum CpuSpeed2 {
CPU_40_BUS_20 = 0,
CPU_48_BUS_24 = 1,
CPU_48_BUS_16 = 2,
CPU_60_BUS_30 = 3,
CPU_60_BUS_20 = 4,
CPU_72_BUS_36 = 5,
CPU_72_BUS_24 = 6,
CPU_72_BUS_18 = 7,
CPU_80_BUS_40_2 = 8,
CPU_80_BUS_27_2 = 9,
CPU_80_BUS_20 = 10,
CPU_90_BUS_45 = 11,
CPU_90_BUS_30 = 12,
CPU_90_BUS_22 = 13
};
/** CPU/Bus speed encoding for ClkSrc3 */
enum CpuSpeed3 {
CPU_62_BUS_31 = 0,
CPU_75_BUS_38 = 1, // actual bus frequency: 37500000 Hz
CPU_75_BUS_25 = 2,
CPU_94_BUS_47 = 3,
CPU_94_BUS_31 = 4,
CPU_113_BUS_56 = 5,
CPU_113_BUS_38 = 6, // actual bus frequency: 37500000 Hz
CPU_113_BUS_28 = 7,
CPU_125_BUS_64 = 8, // actual bus frequency: 63500000 Hz
CPU_125_BUS_42 = 9,
CPU_125_BUS_31 = 10,
CPU_141_BUS_72 = 11, // actual bus frequency: 71500000 Hz
CPU_141_BUS_47 = 12,
CPU_141_BUS_35 = 13
};
/** Configuration and status register offsets. */
enum PlatinumReg : uint32_t {
CPU_ID = 0x00, // read 0x30018140 ; read byte happens
ASIC_REVISION = 0x01,
ROM_TIMING = 0x02,
CACHE_CONFIG = 0x03,
DRAM_TIMING = 0x04,
DRAM_REFRESH = 0x05,
BANK_0_BASE = 0x06,
BANK_1_BASE = 0x07,
BANK_2_BASE = 0x08,
BANK_3_BASE = 0x09, // read byte happens
BANK_4_BASE = 0x0A,
BANK_5_BASE = 0x0B,
BANK_6_BASE = 0x0C,
BANK_7_BASE = 0x0D,
GP_SW_SCRATCH = 0x0E,
PCI_ADDR_MASK = 0x0F,
FB_BASE_ADDR = 0x10,
// = 0x11,
ROW_WORDS = 0x12,
CLOCK_DIVISOR = 0x13, // write 0xff, 0x02
FB_CONFIG_1 = 0x14,
FB_CONFIG_2 = 0x15,
VMEM_PAGE_MODE = 0x16,
MON_ID_SENSE = 0x17,
FB_RESET = 0x18, // write 6, 3, 7, 2
DBL_BUF_CNTL = 0x19,
V_TEST_REG = 0x1A,
VRAM_REFRESH = 0x1B,
// Swatch timing generator registers
SWATCH_CONFIG = 0x20, // 0xff0 ; pxffc for 1280 modes
SWATCH_INT_MASK = 0x21, // 4
SWATCH_INT_STAT = 0x22, // 0
CLR_CURSOR_INT = 0x23, // 0
CLR_ANIM_INT = 0x24, // 0
CLR_VBL_INT = 0x25, // 0
CURSOR_LINE = 0x26, // write 0x320, 0x209, 0x299, 0x38f, 0x428
ANIMATE_LINE = 0x27, // 0
COUNTER_TEST = 0x28, // 0
FIRST_SWATCH = 0x29,
SWATCH_HSERR = 0x29,
SWATCH_HLFLN = 0x2A,
SWATCH_HEQ = 0x2B,
SWATCH_HSP = 0x2C,
SWATCH_HBWAY = 0x2D,
SWATCH_HBRST = 0x2E,
SWATCH_HBP = 0x2F,
SWATCH_HAL = 0x30,
SWATCH_HFP = 0x31,
SWATCH_HPIX = 0x32,
SWATCH_VHLINE = 0x33,
SWATCH_VSYNC = 0x34,
SWATCH_VBPEQ = 0x35,
SWATCH_VBP = 0x36,
SWATCH_VAL = 0x37,
SWATCH_VFP = 0x38,
SWATCH_VFPEQ = 0x39,
TIMING_ADJUST = 0x3A,
CURRENT_LINE = 0x3B, // Current Scan Line
// Iridium datapath registers
IRIDIUM_CONFIG = 0x4A, // write 4
POWER_DOWN_CTRL = 0x4B, // 1-bit register, writing "1" enables power down mode
};
#define REG_TO_INDEX(reg) ((reg) - FIRST_SWATCH)
// FB_CONFIG_1 register bits.
enum {
CFG1_INTERLACE = (1 << 2), // 1 - interlaced video enabled
CFG1_VID_ENABLE = (1 << 4), // 1 - display refresh enabled
CFG1_FULL_BANKS = (1 << 12), // full VRAM banks (64-bit) access enable
};
// 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
};
// SWATCH_INT_MASK register bits.
enum {
SWATCH_INT_VBL = (1 << 0),
SWATCH_INT_ANIM = (1 << 1),
SWATCH_INT_CURSOR = (1 << 2)
};
#define DAMFB_VERSION_PLATINUM 6 // DAMFB cell version in the Platinum ASIC
#define IRIDIUM_VENDOR_VLSI 0 // Vendor ID for the Iridium ASIC => VLSI
constexpr auto VRAM_REGION_BASE = 0xF1000000UL;
constexpr auto PLATINUM_IOREG_BASE = 0xF8000000UL;
}; // namespace Platinum
class PlatinumCtrl : public MemCtrlBase, public VideoCtrlBase, public MMIODevice {
public:
PlatinumCtrl();
~PlatinumCtrl() = default;
static std::unique_ptr<HWComponent> create() {
return std::unique_ptr<PlatinumCtrl>(new PlatinumCtrl());
}
// HWComponent methods
int device_postinit();
// MMIODevice methods
uint32_t read(uint32_t rgn_start, uint32_t offset, int size);
void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size);
void insert_ram_dimm(int slot_num, uint32_t capacity);
void map_phys_ram();
protected:
void enable_display();
void enable_cursor_int();
void update_irq(uint8_t irq_line_state, uint8_t irq_mask);
private:
uint32_t cpu_id;
uint8_t cpu_type; // 0 - MPC601, 1 - 603/604 CPU
// memory controller state
uint32_t rom_timing = 0;
uint32_t dram_timing = 0xEFF;
uint32_t dram_refresh = 0x1F4;
uint32_t bank_base[8] = {};
uint32_t bank_size[8] = {};
// frame buffer controller state
uint32_t fb_addr = Platinum::VRAM_REGION_BASE;
uint32_t fb_offset = 0;
uint32_t fb_config_1 = 0x1F00;
uint32_t fb_config_2 = 0x1FFF;
uint32_t clock_divisor = 0;
uint32_t row_words = 0;
uint32_t fb_reset = 7;
int reset_step = 0;
uint32_t fb_test = DAMFB_VERSION_PLATINUM << 9;
uint32_t vram_refresh = 0x1F4;
uint32_t vram_size = 0;
uint32_t iridium_cfg = (IRIDIUM_VENDOR_VLSI << 24) | 1; // big-endian bus
uint8_t vram_megs = 0;
uint8_t half_bank = 0;
uint8_t half_access = 0;
uint8_t vmem_fp_mode = 0;
uint8_t mon_sense = 0;
// video timing generator (Swatch) state
uint32_t swatch_config = 0xFFD;
uint32_t swatch_params[17] = {};
uint32_t timing_adjust = 0;
uint32_t power_down_ctrl = 0;
// interrupt related state
uint32_t swatch_int_mask = 0;
uint32_t swatch_int_stat = 0;
uint32_t cursor_line = 0;
uint32_t cursor_task_id = 0;
std::unique_ptr<uint8_t[]> vram_ptr = nullptr;
std::unique_ptr<DisplayID> display_id = nullptr;
std::unique_ptr<AppleRamdac> dacula = nullptr;
};
#endif // PLATINUM_MEMCTRL_H
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