libpcsxcore/lightrec/mem_wiiu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2022 Ash Logan <ash@heyquark.com>
   4  */
   5
   6 #include <coreinit/memorymap.h>
   7 #include <malloc.h>
   8 #include <stdbool.h>
   9
  10 #include "../memmap.h"
  11 #include "../psxhw.h"
  12 #include "../psxmem.h"
  13 #include "../r3000a.h"
  14
  15 #include "mem.h"
  16
  17 void* code_buffer;
  18
  19 static void* wiiu_mmap(uint32_t requested_va, size_t length, void* backing_mem) {
  20         if (length < OS_PAGE_SIZE) length = OS_PAGE_SIZE;
  21
  22         uint32_t va = OSAllocVirtAddr(requested_va, length, 0);
  23         if (!va) return MAP_FAILED;
  24
  25         BOOL mapped = OSMapMemory(va, OSEffectiveToPhysical((uint32_t)backing_mem),
  26                                   length, OS_MAP_MEMORY_READ_WRITE);
  27         if (!mapped) {
  28                 OSFreeVirtAddr(va, length);
  29                 return MAP_FAILED;
  30         }
  31
  32         return (void*)va;
  33 }
  34
  35 static void wiiu_unmap(void* va, size_t length) {
  36         if (va == MAP_FAILED) return;
  37         OSUnmapMemory((uint32_t)va, length);
  38         OSFreeVirtAddr((uint32_t)va, length);
  39 }
  40
  41 static void* psx_mem;
  42 static void* psx_parallel;
  43 static void* psx_scratch;
  44 static void* psx_bios;
  45
  46 int lightrec_init_mmap(void) {
  47         psx_mem      = memalign(OS_PAGE_SIZE, 0x200000);
  48         psx_parallel = memalign(OS_PAGE_SIZE, 0x10000);
  49         psx_scratch  = memalign(OS_PAGE_SIZE, 0x10000);
  50         psx_bios     = memalign(OS_PAGE_SIZE, 0x80000);
  51         if (!psx_mem || !psx_parallel || !psx_scratch || !psx_bios)
  52                 goto cleanup_allocations;
  53
  54         uint32_t avail_va;
  55         uint32_t avail_va_size;
  56         OSGetMapVirtAddrRange(&avail_va, &avail_va_size);
  57         if (!avail_va || avail_va_size < 0x20000000)
  58                 goto cleanup_allocations;
  59
  60         // Map 4x ram mirrors
  61         int i;
  62         for (i = 0; i < 4; i++) {
  63                 void* ret = wiiu_mmap(avail_va + 0x200000 * i, 0x200000, psx_mem);
  64                 if (ret == MAP_FAILED) break;
  65         }
  66         if (i != 4) {
  67                 for (int i = 0; i < 4; i++)
  68                         wiiu_unmap(avail_va + 0x200000 * i, 0x200000);
  69                 goto cleanup_allocations;
  70         }
  71         psxM = (void*)avail_va;
  72
  73         psxP = wiiu_mmap(avail_va + 0x1f000000, 0x10000, psx_parallel);
  74         psxH = wiiu_mmap(avail_va + 0x1f800000, 0x10000, psx_scratch);
  75         psxR = wiiu_mmap(avail_va + 0x1fc00000, 0x80000, psx_bios);
  76
  77         if (psxP == MAP_FAILED || psxH == MAP_FAILED || psxR == MAP_FAILED) {
  78                 for (int i = 0; i < 4; i++)
  79                         wiiu_unmap(psxM + 0x200000 * i, 0x200000);
  80                 wiiu_unmap(psxP, 0x10000);
  81                 wiiu_unmap(psxH, 0x10000);
  82                 wiiu_unmap(psxR, 0x80000);
  83                 goto cleanup_allocations;
  84         }
  85
  86         code_buffer = WUP_RWX_MEM_BASE;
  87
  88         return 0;
  89
  90 cleanup_allocations:
  91         free(psx_mem);
  92         free(psx_parallel);
  93         free(psx_scratch);
  94         free(psx_bios);
  95         return -1;
  96 }
  97
  98 void lightrec_free_mmap(void) {
  99         for (int i = 0; i < 4; i++)
 100                 wiiu_unmap(psxM + 0x200000 * i, 0x200000);
 101         wiiu_unmap(psxP, 0x10000);
 102         wiiu_unmap(psxH, 0x10000);
 103         wiiu_unmap(psxR, 0x80000);
 104         free(psx_mem);
 105         free(psx_parallel);
 106         free(psx_scratch);
 107         free(psx_bios);
 108 }