mirror of
https://github.com/hrydgard/ppsspp.git
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Henrik RydgårdandClaude Opus 5.5
0b1e1a9bb3
A PS1 EBOOT now boots the installed firmware's POPS manager (flash0:/kd/popsman.prx), which loads its PS1 emulator (pops_0Xg.prx) for the game. Load_PSP_POPS stands in for the kernel's reboot into its POPS configuration: it loads the manager and that configuration's user modules, and a helper thread makes the kernel init's scePopsManLoadModule(path, 0) call. InitForKernel reports a POPS boot from the memory stick. The emulator plays its sound on the Media Engine, so a PS1 boot always gets the emulated ME, whatever the homebrew setting says, and is refused on platforms that can't emulate it. The manager boots the ME with its own code (POPS's reboot has no me_wrapper, so Sony's ME firmware isn't booted for it), and its ME loop runs there unchanged, playing through the audio block. Everything in POPS that reaches hardware registers is kernel code, so a POPS boot leaves the ME's kernel mode stopgap (g_kernelModeAnywhere) off: 7% fewer host instructions in Crash Bandicoot. The manager also drives the GE directly: its stall register and FINISH status are an MMIO device that only answers during a POPS boot, and stall writes extend the HLE GPU's current list. The 6.60 and 6.61 popsman.prx and pops_01g/02g.prx have the same code. The manager's is checked when it's loaded, and any other one fails the boot with a message. Savestates include the boot's threads. Reading a game's disc image needs the next two changes. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
103 lines
3.0 KiB
C++
103 lines
3.0 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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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, version 2.0 or later versions.
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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 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include <cstring>
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#include "Common/Common.h"
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#include "Common/Log.h"
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#include "Common/Serialize/Serializer.h"
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#include "Common/Serialize/SerializeFuncs.h"
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#include "Core/HLE/PopsBoot.h"
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#include "Core/HW/MMIO.h"
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#include "Core/HW/PopsMMIO.h"
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#include "GPU/GPU.h"
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#include "GPU/GPUCommon.h"
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namespace PopsMMIO {
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namespace {
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// The manager extends the emulator's stalled display list each frame: a FINISH, then the stall.
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class GeDevice : public MMIODevice {
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public:
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GeDevice() : MMIODevice("GE", 0xBD400000, 0x400) {}
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bool Read(MIPSState *mips, u32 offset, int size, u32 *value) override {
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if (!PopsBootActive() || size != 4) {
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return false;
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}
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DisplayList list;
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const bool running = gpu && gpu->GetCurrentDisplayList(list);
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if (offset == REG_STALL) {
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*value = running ? list.stall : 0;
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return true;
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}
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if (offset == REG_INTR_STATUS) {
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// The HLE GPU runs up to the stall right away, so the FINISH before it is done.
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const bool atStall = running && list.stall != 0 && (list.pc & 0x0FFFFFFF) == (list.stall & 0x0FFFFFFF);
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*value = atStall ? INTR_FINISH : 0;
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return true;
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}
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return false;
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}
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bool Write(MIPSState *mips, u32 offset, int size, u32 value) override {
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if (!PopsBootActive() || size != 4) {
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return false;
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}
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if (offset == REG_INTR_ACK) {
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return true;
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}
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if (offset != REG_STALL) {
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return false;
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}
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DisplayList list;
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if (!gpu || !gpu->GetCurrentDisplayList(list)) {
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WARN_LOG(Log::G3D, "GE stall register write %08x with no list running", value);
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return true;
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}
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bool runList = false;
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const u32 result = gpu->UpdateStall(list.id, value, &runList);
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if (result & 0x80000000) {
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WARN_LOG(Log::G3D, "GE stall register write %08x: list %d refused it (%08x)", value, list.id, result);
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} else if (runList) {
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gpu->ProcessDLQueue();
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}
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return true;
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}
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void Reset() override {}
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void DoState(PointerWrap &p) override {}
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private:
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static constexpr u32 REG_STALL = 0x10C;
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static constexpr u32 REG_INTR_STATUS = 0x304;
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static constexpr u32 REG_INTR_ACK = 0x310;
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static constexpr u32 INTR_FINISH = 4;
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};
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GeDevice g_ge;
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} // namespace
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const std::vector<MMIODevice *> &Devices() {
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static const std::vector<MMIODevice *> devices = { &g_ge };
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return devices;
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}
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} // namespace PopsMMIO
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