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#include "libu64/overlay.h"
#include "ultra64.h"
#include "printf.h"
#include "translation.h"
#include "dma.h"
size_t Overlay_Load(uintptr_t vromStart, uintptr_t vromEnd, void* vramStart, void* vramEnd, void* allocatedRamAddr) {
s32 pad[3];
uintptr_t end;
OverlayRelocationSection* ovlRelocs;
u32 relocSectionOffset = 0;
s32 size = vromEnd - vromStart;
if (gOverlayLogSeverity >= 3) {
PRINTF(
T("\nダイナミックリンクファンクションのロードを開始します\n", "\nStart loading dynamic link function\n"));
}
size = vromEnd - vromStart;
end = (uintptr_t)allocatedRamAddr + size;
if (gOverlayLogSeverity >= 3) {
PRINTF(T("TEXT,DATA,RODATA+relをＤＭＡ転送します(%08x-%08x)\n",
"DMA transfer of TEXT, DATA, RODATA + rel (%08x-%08x)\n"),
allocatedRamAddr, end);
}
// DMA the overlay, wait until transfer completes
DmaMgr_RequestSync(allocatedRamAddr, vromStart, size);
// The overlay file is expected to contain a 32-bit offset from the end of the file to the start of the
// relocation section.
relocSectionOffset = ((s32*)end)[-1];
ovlRelocs = (OverlayRelocationSection*)(end - relocSectionOffset);
if (gOverlayLogSeverity >= 3) {
PRINTF("TEXT(%08x), DATA(%08x), RODATA(%08x), BSS(%08x)\n", ovlRelocs->textSize, ovlRelocs->dataSize,
ovlRelocs->rodataSize, ovlRelocs->bssSize);
}
if (gOverlayLogSeverity >= 3) {
PRINTF(T("リロケーションします\n", "Relocate\n"));
}
// Relocate pointers in overlay code and data
Overlay_Relocate(allocatedRamAddr, ovlRelocs, vramStart);
// Clear bss if present, bss is located immediately following the relocations
if (ovlRelocs->bssSize != 0) {
if (gOverlayLogSeverity >= 3) {
PRINTF(T("BSS領域をクリアします(%08x-%08x)\n", "Clear BSS area (%08x-%08x)\n"), end,
end + ovlRelocs->bssSize);
}
bzero((void*)end, ovlRelocs->bssSize);
}
size = (uintptr_t)(ovlRelocs->relocations + ovlRelocs->nRelocations) - (uintptr_t)ovlRelocs;
if (gOverlayLogSeverity >= 3) {
PRINTF(T("REL領域をクリアします(%08x-%08x)\n", "Clear REL area (%08x-%08x)\n"), ovlRelocs,
(uintptr_t)ovlRelocs + size);
}
// Clear relocations, this space remains allocated and goes unused
bzero(ovlRelocs, size);
// Manually flush caches
size = (uintptr_t)vramEnd - (uintptr_t)vramStart;
osWritebackDCache(allocatedRamAddr, size);
osInvalICache(allocatedRamAddr, size);
if (gOverlayLogSeverity >= 3) {
PRINTF(
T("ダイナミックリンクファンクションのロードを終了します\n\n", "Finish loading dynamic link function\n\n"));
}
return size;
}
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