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Bus: Direct KUSEG+KSEG0 isolated cache reads to ICache

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Stenzek 2024-03-09 01:30:17 +10:00
parent 3395853ba2
commit d1a1cab9a9
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1 changed files with 14 additions and 30 deletions
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44
src/core/bus.cpp
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@ -1642,6 +1642,9 @@ void Bus::SetHandlers()
read_handler<MemoryAccessSize::HalfWord>, read_handler<MemoryAccessSize::Word>, \
write_handler<MemoryAccessSize::Byte>, write_handler<MemoryAccessSize::HalfWord>, \
write_handler<MemoryAccessSize::Word>)
#define SETUC(start, size, read_handler, write_handler) \
SET(g_memory_handlers, start, size, read_handler, write_handler); \
SET(g_memory_handlers_isc, start, size, read_handler, write_handler)
static constexpr u32 KUSEG = 0;
static constexpr u32 KSEG0 = 0x80000000U;
@ -1649,6 +1652,7 @@ void Bus::SetHandlers()
static constexpr u32 KSEG2 = 0xC0000000U;
// KUSEG - Cached
// Cache isolated appears to affect KUSEG+KSEG0.
SET(g_memory_handlers, KUSEG | RAM_BASE, RAM_MIRROR_SIZE, RAMReadHandler, RAMWriteHandler);
SET(g_memory_handlers, KUSEG | CPU::SCRATCHPAD_ADDR, 0x1000, ScratchpadReadHandler, ScratchpadWriteHandler);
SET(g_memory_handlers, KUSEG | BIOS_BASE, BIOS_SIZE, BIOSReadHandler, IgnoreWriteHandler);
@ -1656,6 +1660,7 @@ void Bus::SetHandlers()
SET(g_memory_handlers, KUSEG | HW_BASE, HW_SIZE, HardwareReadHandler, HardwareWriteHandler);
SET(g_memory_handlers, KUSEG | EXP2_BASE, EXP2_SIZE, EXP2ReadHandler, EXP2WriteHandler);
SET(g_memory_handlers, KUSEG | EXP3_BASE, EXP3_SIZE, EXP3ReadHandler, EXP3WriteHandler);
SET(g_memory_handlers_isc, KUSEG, 0x80000000, ICacheReadHandler, ICacheWriteHandler);
// KSEG0 - Cached
SET(g_memory_handlers, KSEG0 | RAM_BASE, RAM_MIRROR_SIZE, RAMReadHandler, RAMWriteHandler);
@ -1665,42 +1670,21 @@ void Bus::SetHandlers()
SET(g_memory_handlers, KSEG0 | HW_BASE, HW_SIZE, HardwareReadHandler, HardwareWriteHandler);
SET(g_memory_handlers, KSEG0 | EXP2_BASE, EXP2_SIZE, EXP2ReadHandler, EXP2WriteHandler);
SET(g_memory_handlers, KSEG0 | EXP3_BASE, EXP3_SIZE, EXP3ReadHandler, EXP3WriteHandler);
SET(g_memory_handlers_isc, KSEG0, 0x20000000, ICacheReadHandler, ICacheWriteHandler);
// KSEG1 - Uncached
SET(g_memory_handlers, KSEG1 | RAM_BASE, RAM_MIRROR_SIZE, RAMReadHandler, RAMWriteHandler);
SET(g_memory_handlers, KSEG1 | BIOS_BASE, BIOS_SIZE, BIOSReadHandler, IgnoreWriteHandler);
SET(g_memory_handlers, KSEG1 | EXP1_BASE, EXP1_SIZE, EXP1ReadHandler, EXP1WriteHandler);
SET(g_memory_handlers, KSEG1 | HW_BASE, HW_SIZE, HardwareReadHandler, HardwareWriteHandler);
SET(g_memory_handlers, KSEG1 | EXP2_BASE, EXP2_SIZE, EXP2ReadHandler, EXP2WriteHandler);
SET(g_memory_handlers, KSEG1 | EXP3_BASE, EXP3_SIZE, EXP3ReadHandler, EXP3WriteHandler);
SETUC(KSEG1 | RAM_BASE, RAM_MIRROR_SIZE, RAMReadHandler, RAMWriteHandler);
SETUC(KSEG1 | BIOS_BASE, BIOS_SIZE, BIOSReadHandler, IgnoreWriteHandler);
SETUC(KSEG1 | EXP1_BASE, EXP1_SIZE, EXP1ReadHandler, EXP1WriteHandler);
SETUC(KSEG1 | HW_BASE, HW_SIZE, HardwareReadHandler, HardwareWriteHandler);
SETUC(KSEG1 | EXP2_BASE, EXP2_SIZE, EXP2ReadHandler, EXP2WriteHandler);
SETUC(KSEG1 | EXP3_BASE, EXP3_SIZE, EXP3ReadHandler, EXP3WriteHandler);
// KSEG2 - Uncached - 0xFFFE0130
SET(g_memory_handlers, KSEG2 | 0xFFFE0000, 0x1000, CacheControlReadHandler, CacheControlWriteHandler);
// When cache isolated, only allow writes to cache? Or should we still allow KSEG1?
SET(g_memory_handlers_isc, KUSEG | RAM_BASE, RAM_MIRROR_SIZE, RAMReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KUSEG | CPU::SCRATCHPAD_ADDR, 0x1000, ScratchpadReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KUSEG | BIOS_BASE, BIOS_SIZE, BIOSReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KUSEG | EXP1_BASE, EXP1_SIZE, EXP1ReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KUSEG | HW_BASE, HW_SIZE, HardwareReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KUSEG | EXP2_BASE, EXP2_SIZE, EXP2ReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KUSEG | EXP3_BASE, EXP3_SIZE, EXP3ReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG0 | RAM_BASE, RAM_MIRROR_SIZE, RAMReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG0 | CPU::SCRATCHPAD_ADDR, 0x1000, ScratchpadReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG0 | BIOS_BASE, BIOS_SIZE, BIOSReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG0 | EXP1_BASE, EXP1_SIZE, EXP1ReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG0 | HW_BASE, HW_SIZE, HardwareReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG0 | EXP2_BASE, EXP2_SIZE, EXP2ReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG0 | EXP3_BASE, EXP3_SIZE, EXP3ReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG1 | RAM_BASE, RAM_MIRROR_SIZE, RAMReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG1 | BIOS_BASE, BIOS_SIZE, BIOSReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG1 | EXP1_BASE, EXP1_SIZE, EXP1ReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG1 | HW_BASE, HW_SIZE, HardwareReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG1 | EXP2_BASE, EXP2_SIZE, EXP2ReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG1 | EXP3_BASE, EXP3_SIZE, EXP3ReadHandler, ICacheWriteHandler);
SET(g_memory_handlers_isc, KSEG2 | 0xFFFE0000, 0x1000, CacheControlReadHandler, CacheControlWriteHandler);
SETUC(KSEG2 | 0xFFFE0000, 0x1000, CacheControlReadHandler, CacheControlWriteHandler);
#undef SET
#undef SETUC
}
void Bus::ClearHandlers(void** handlers)