mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-28 19:07:47 -04:00
Matthew Stanley
fe42da2744
Keeps both lines: master's PGXP session, draw-distance clamps, masked rejects and saturated-winding NCLIP; the release's render-pass kit additions, verified media/disc extents, timeline/present rings, cull-scale sites. Overlay ABI v30. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
#ifndef PSXRECOMP_PSX_ICACHE_H
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#define PSXRECOMP_PSX_ICACHE_H
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#include "cpu_state.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern uint32_t g_psx_icache_tv[1024];
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extern int g_psx_icache_active;
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extern int g_ls_replay_active;
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void psx_icache_reset(void);
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void psx_icache_fetch(CPUState *cpu, uint32_t addr);
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void psx_icache_fetch_miss(CPUState *cpu, uint32_t addr);
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/* BIU / cache control (0xFFFE0130) bits the cache model reads; names and values
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* as Beetle's cpu.cpp BIU_* defines. */
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#define PSX_BIU_ICACHE_ENABLE 0x800u /* BIU_ENABLE_ICACHE_S1 */
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#define PSX_BIU_DCACHE_ENABLE 0x080u /* BIU_ENABLE_DCACHE */
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#define PSX_BIU_TAG_TEST 0x004u /* BIU_TAG_TEST_MODE */
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#define PSX_BIU_INVALIDATE 0x002u /* BIU_INVALIDATE_MODE */
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#define PSX_BIU_LOCK 0x001u /* BIU_LOCK_MODE */
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/* A CPU store made while SR.IsC is set, applied to the I-cache model: the
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* I-cache half of Beetle PS_CPU::WriteMemory's IsC branch. With the I-cache
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* enabled and a tag-test, invalidate or lock mode bit set, the store rewrites
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* the tag and valid bits of the four words of its line; that is how FlushCache
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* (A 44h) invalidates the cache. `biu` is the current 0xFFFE0130 value and
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* `value` the stored register value (only its low byte lanes matter). */
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void psx_icache_isc_store(uint32_t biu, uint32_t addr, uint32_t value);
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/* Keep the interpreter's steady-state tag hit inside its translation unit.
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* Misses use the shared slow path, preserving exact cache evolution/timing. */
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static inline void psx_icache_fetch_interp(CPUState *cpu, uint32_t addr) {
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#ifdef PSX_ENABLE_BLOCK_CYCLES
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if (g_ls_replay_active) return;
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if (g_psx_icache_active < 0) {
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psx_icache_fetch(cpu, addr);
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return;
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}
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if (!g_psx_icache_active) return;
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uint32_t idx = (addr & 0xFFCu) >> 2;
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if (g_psx_icache_tv[idx] == addr) return;
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psx_icache_fetch_miss(cpu, addr);
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#else
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(void)cpu;
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(void)addr;
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#endif
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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