mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-10-22 10:49:05 +02:00
Henrik RydgårdandClaude Opus 5.5
8af7643efa
The calls homebrew starts the ME with (1.50's NIDs, and 3.71's for the ME's reset and bus clock) set or clear a bit of the reset or bus clock register the way the firmware's driver does, returning whether it was set. Only those NIDs, so a later firmware's lowio.prx keeps its own exports under --vsh. Kernel modules copy their ME code to the boot page with SysclibForKernel's memcpy, which now goes through MMIO for hardware addresses like the replaced memcpy already did (MMIO::Copy, shared). pspsdk's mebasic, MElib's test, PSP Bunny, snes9xTYL and ProTrekkr's test now start their ME. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
97 lines
4.2 KiB
C++
97 lines
4.2 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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// The parts of the firmware's system register driver homebrew uses to start the Media Engine. Each
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// sets or clears a bit of a register the way the driver does (lowio.prx 6.61 at 080001b8 and
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// 080004b8, sysreg.prx 1.50 the same), returning whether it was set. Only the NIDs of the firmware
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// versions homebrew was built for (1.50, and 3.71 and later's for the ME calls), so the VSH's own
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// later lowio.prx keeps its exports.
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#include "Common/CommonTypes.h"
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#include "Core/HLE/HLE.h"
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#include "Core/HLE/FunctionWrappers.h"
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#include "Core/HLE/sceSysreg.h"
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#include "Core/HW/MMIO.h"
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#include "Core/MIPS/MIPS.h"
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enum : u32 {
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SYSREG_RESET = 0xBC10004C,
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SYSREG_BUS_CLOCK = 0xBC100050,
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RESET_ME = 0x04,
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RESET_VME = 0x10,
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RESET_AVC = 0x20,
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BUS_CLOCK_ME = 0x01,
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};
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static int SetSysregBit(MIPSState *mips, u32 reg, u32 bit, bool set) {
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const u32 old = MMIO::Read(mips, reg, 4);
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MMIO::Write(mips, reg, 4, set ? (old | bit) : (old & ~bit));
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return (old & bit) ? 1 : 0;
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}
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static int sceSysregMeResetEnable(MIPSState *mips) {
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return hleLogDebug(Log::ME, SetSysregBit(mips, SYSREG_RESET, RESET_ME, true));
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}
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static int sceSysregMeResetDisable(MIPSState *mips) {
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return hleLogDebug(Log::ME, SetSysregBit(mips, SYSREG_RESET, RESET_ME, false));
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}
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static int sceSysregMeBusClockEnable(MIPSState *mips) {
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return hleLogDebug(Log::ME, SetSysregBit(mips, SYSREG_BUS_CLOCK, BUS_CLOCK_ME, true));
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}
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static int sceSysregMeBusClockDisable(MIPSState *mips) {
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return hleLogDebug(Log::ME, SetSysregBit(mips, SYSREG_BUS_CLOCK, BUS_CLOCK_ME, false));
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}
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static int sceSysregVmeResetEnable(MIPSState *mips) {
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return hleLogDebug(Log::ME, SetSysregBit(mips, SYSREG_RESET, RESET_VME, true));
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}
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static int sceSysregVmeResetDisable(MIPSState *mips) {
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return hleLogDebug(Log::ME, SetSysregBit(mips, SYSREG_RESET, RESET_VME, false));
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}
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static int sceSysregAvcResetEnable(MIPSState *mips) {
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return hleLogDebug(Log::ME, SetSysregBit(mips, SYSREG_RESET, RESET_AVC, true));
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}
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static int sceSysregAvcResetDisable(MIPSState *mips) {
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return hleLogDebug(Log::ME, SetSysregBit(mips, SYSREG_RESET, RESET_AVC, false));
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}
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const HLEFunction sceSysreg_driver[] = {
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{0xDE59DACB, &WrapI_V<sceSysregMeResetEnable>, "sceSysregMeResetEnable", 'i', "", HLE_KERNEL_SYSCALL },
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{0x2DB0EB28, &WrapI_V<sceSysregMeResetDisable>, "sceSysregMeResetDisable", 'i', "", HLE_KERNEL_SYSCALL },
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{0x44F6CDA7, &WrapI_V<sceSysregMeBusClockEnable>, "sceSysregMeBusClockEnable", 'i', "", HLE_KERNEL_SYSCALL },
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{0x158AD4FC, &WrapI_V<sceSysregMeBusClockDisable>, "sceSysregMeBusClockDisable", 'i', "", HLE_KERNEL_SYSCALL },
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{0xD20581EA, &WrapI_V<sceSysregVmeResetEnable>, "sceSysregVmeResetEnable", 'i', "", HLE_KERNEL_SYSCALL },
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{0x7558064A, &WrapI_V<sceSysregVmeResetDisable>, "sceSysregVmeResetDisable", 'i', "", HLE_KERNEL_SYSCALL },
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{0x9BB70D34, &WrapI_V<sceSysregAvcResetEnable>, "sceSysregAvcResetEnable", 'i', "", HLE_KERNEL_SYSCALL },
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{0xFD6C562B, &WrapI_V<sceSysregAvcResetDisable>, "sceSysregAvcResetDisable", 'i', "", HLE_KERNEL_SYSCALL },
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// 3.71 and later.
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{0xA9997109, &WrapI_V<sceSysregMeResetEnable>, "sceSysregMeResetEnable371", 'i', "", HLE_KERNEL_SYSCALL },
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{0x76220E94, &WrapI_V<sceSysregMeResetDisable>, "sceSysregMeResetDisable371", 'i', "", HLE_KERNEL_SYSCALL },
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{0x3199CF1C, &WrapI_V<sceSysregMeBusClockEnable>, "sceSysregMeBusClockEnable371", 'i', "", HLE_KERNEL_SYSCALL },
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};
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void Register_sceSysreg_driver() {
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RegisterHLEModule("sceSysreg_driver", ARRAY_SIZE(sceSysreg_driver), sceSysreg_driver);
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}
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