mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
7bcb11916a
The UI prepass re-read aperture node payloads through the RAM-folded key, so
THPS2's relocated prim arena discarded the HUD squash every frame.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
(cherry picked from commit fd6267e952)
89 lines
3.6 KiB
C
89 lines
3.6 KiB
C
#ifndef PSXRECOMP_MOD_MEMORY_H
|
|
#define PSXRECOMP_MOD_MEMORY_H
|
|
|
|
#include <stdint.h>
|
|
#include "psx_memory.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* GPU linked-list tags carry only 24 address bits. Trusted enhancements that
|
|
* need a larger primitive arena use this otherwise-unmapped 8 MiB aperture so
|
|
* their CPU pointers survive the tag truncation. Nothing is mapped until an
|
|
* enhancement explicitly allocates from it.
|
|
*/
|
|
#define PSX_MOD_GPU_DMA_APERTURE_BASE 0x00800000u
|
|
#define PSX_MOD_GPU_DMA_APERTURE_SIZE (8u * 1024u * 1024u)
|
|
#define PSX_MOD_GPU_DMA_GUEST_BASE 0x80800000u
|
|
|
|
static inline int psx_mod_gpu_dma_aperture_offset_for(
|
|
uint32_t address, uint32_t width, uint32_t used, uint32_t *offset) {
|
|
/* CPU addresses retain all physical bits after KSEG normalization. The
|
|
* BIOS at 0x1FC00000 must never alias the enhancement aperture.
|
|
* DMA callers pass an already-truncated 24-bit tag separately below. */
|
|
uint32_t canonical = address & 0x1FFFFFFFu;
|
|
uint32_t off;
|
|
if (canonical < PSX_MOD_GPU_DMA_APERTURE_BASE ||
|
|
canonical >= 0x01000000u || used > PSX_MOD_GPU_DMA_APERTURE_SIZE)
|
|
return 0;
|
|
off = canonical - PSX_MOD_GPU_DMA_APERTURE_BASE;
|
|
if (off > used || width > used - off) return 0;
|
|
if (offset) *offset = off;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Fold DMA addresses through live main RAM unless the address is inside the
|
|
* portion of the enhancement aperture that has actually been allocated.
|
|
*/
|
|
static inline uint32_t psx_mod_gpu_dma_resolve_address_for(
|
|
uint32_t address, uint32_t used) {
|
|
uint32_t canonical = address & 0x00FFFFFCu;
|
|
if (psx_mod_gpu_dma_aperture_offset_for(
|
|
canonical, 4u, used, (uint32_t *)0))
|
|
return canonical;
|
|
/* 24-bit tag bits above the 8 MiB decode window are ignored, then the
|
|
* live geometry folds (retail: exactly the DMAC's 0x1FFFFC). */
|
|
return psx_ram_canonical_offset(canonical) & ~3u;
|
|
}
|
|
|
|
/*
|
|
* Identity of a GPU packet word at `address` (a CPU pointer or a DMA tag):
|
|
* the allocated enhancement aperture keeps its own physical address, main
|
|
* RAM folds to its word-aligned live offset. Every source-address key (UI
|
|
* prepass nodes and items, packet guards, title roles) uses this, so a packet
|
|
* in the aperture never shares a key with, or reads back, the main RAM its
|
|
* low bits alias.
|
|
*/
|
|
static inline uint32_t psx_gpu_packet_key_for(uint32_t address, uint32_t used) {
|
|
uint32_t canonical = address & 0x1FFFFFFCu;
|
|
if (psx_mod_gpu_dma_aperture_offset_for(
|
|
canonical, 4u, used, (uint32_t *)0))
|
|
return canonical;
|
|
return psx_ram_canonical_offset(canonical) & ~3u;
|
|
}
|
|
|
|
uint32_t psx_gpu_packet_key(uint32_t address);
|
|
uint32_t psx_mod_gpu_dma_memory_alloc(uint32_t size, uint32_t alignment);
|
|
uint32_t psx_mod_gpu_dma_resolve_address(uint32_t address);
|
|
/* A complete range in the allocated GPU packet aperture (CPU or tag address).
|
|
* Unallocated bytes, BIOS aliases and a range crossing its end are refused. */
|
|
int psx_mod_gpu_dma_memory_contains(uint32_t address,uint32_t bytes);
|
|
uint32_t psx_mod_memory_alloc(uint32_t size, uint32_t alignment);
|
|
/* Allocations are fixed during activation. Snapshot allocated bytes, never
|
|
* host pointers; immutable host assets are reconstructed separately. */
|
|
uint32_t psx_mod_memory_snapshot_bytes(void);
|
|
void psx_mod_memory_snapshot_write(uint8_t* out);
|
|
int psx_mod_memory_snapshot_read(const uint8_t* data, uint32_t size);
|
|
/* 1 iff psx_mod_memory_snapshot_read would accept the section; mutates nothing. */
|
|
int psx_mod_memory_snapshot_validate(const uint8_t* data, uint32_t size);
|
|
uint32_t psx_mod_memory_layout_cookie(void);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|