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https://github.com/dingusdev/dingusppc.git
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110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-22 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** Bandit ARBus-to-PCI bridge definitions.
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The Bandit ASIC is a custom ARBus-to-PCI bridge used in the second
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generation of the Power Macintosh computer equipped with the PCI bus.
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*/
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#ifndef BANDIT_PCI_H
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#define BANDIT_PCI_H
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#include <devices/common/hwcomponent.h>
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#include <devices/common/mmiodevice.h>
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#include <devices/common/pci/pcidevice.h>
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#include <devices/common/pci/pcihost.h>
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#include <cinttypes>
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#include <memory>
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#include <string>
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#include <unordered_map>
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#define BANDIT_ID_SEL (1 << 0) // Bandit's own IDSEL
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#define BANDIT_CAR_TYPE (1 << 0) // Bandit config address type bit
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#define BANDIT_CONFIG_SPACE 0x00800000 // Bandit Config Space bit
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/** Bandit specific configuration registers. */
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enum {
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BANDIT_ADDR_MASK = 0x48,
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BANDIT_MODE_SELECT = 0x50,
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BANDIT_ARBUS_RD_HOLD_OFF = 0x58,
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};
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/** checks if one bit is set at time, return 0 if not */
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#define SINGLE_BIT_SET(val) ((val) && !((val) & ((val)-1)))
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class Bandit : public PCIHost, public PCIDevice {
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public:
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Bandit(int bridge_num, std::string name, int dev_id=1, int rev=3);
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~Bandit() = default;
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static std::unique_ptr<HWComponent> create_first() {
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return std::unique_ptr<Bandit>(new Bandit(1, "Bandit-PCI1"));
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};
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static std::unique_ptr<HWComponent> create_psx_first() {
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return std::unique_ptr<Bandit>(new Bandit(1, "PSX-PCI1", 8, 0));
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};
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uint32_t pci_cfg_read(uint32_t reg_offs, uint32_t size);
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void pci_cfg_write(uint32_t reg_offs, uint32_t value, uint32_t size);
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// MMIODevice methods
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uint32_t read(uint32_t rgn_start, uint32_t offset, int size);
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void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size);
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protected:
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void verbose_address_space();
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private:
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uint32_t base_addr;
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uint32_t config_addr;
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uint32_t addr_mask;
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uint32_t mode_ctrl; // controls various chip modes/features
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uint32_t rd_hold_off_cnt;
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};
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/** Chaos is a custom ARBus-to-PCI bridge that provides a specialized
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PCI-like bus for video called VCI. This 64-bit bus runs at the same
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frequency as the CPU bus (40-50 MHz) and provides an interface
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between video input/output devices and the CPU bus.
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*/
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class Chaos : public PCIHost, public MMIODevice {
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public:
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Chaos(std::string name);
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~Chaos() = default;
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static std::unique_ptr<HWComponent> create() {
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return std::unique_ptr<Chaos>(new Chaos("VCI0"));
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};
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// MMIODevice methods
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uint32_t read(uint32_t rgn_start, uint32_t offset, int size);
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void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size);
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private:
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std::string name;
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uint32_t config_addr;
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};
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#endif // BANDIT_PCI_H
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