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Deciphering copy packets.

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This commit is contained in:
Ben Vanik
2014-12-24 03:58:04 -08:00
parent 3dffc72e59
commit 9c6be1edba
3 changed files with 197 additions and 24 deletions
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17
src/xenia/kernel/xboxkrnl_video.cc
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@@ -369,14 +369,16 @@ SHIM_CALL VdSwap_shim(PPCContext* ppc_state, KernelState* state) {
uint32_t unk0 = SHIM_GET_ARG_32(0); // ptr into primary ringbuffer
uint32_t unk1 = SHIM_GET_ARG_32(1);
uint32_t unk2 = SHIM_GET_ARG_32(2);
uint32_t unk3 = SHIM_GET_ARG_32(3); // ptr to 0xBEEF0000
uint32_t unk4 = SHIM_GET_ARG_32(4); // 0xBEEF0001
uint32_t unk5 = SHIM_GET_ARG_32(5);
uint32_t unk6 = SHIM_GET_ARG_32(6); // ptr to 6?
uint32_t unk3 = SHIM_GET_ARG_32(3); // ptr to 0xBEEF0000
uint32_t unk4 = SHIM_GET_ARG_32(4); // 0xBEEF0001
uint32_t frontbuffer_ptr = SHIM_GET_ARG_32(5); // ptr to frontbuffer address
uint32_t unk6 = SHIM_GET_ARG_32(6); // ptr to 6?
uint32_t unk7 = SHIM_GET_ARG_32(7);
XELOGD("VdSwap(%.8X, %.8X, %.8X, %.8X, %.8X, %.8X, %.8X, %.8X)", unk0, unk1,
unk2, unk3, unk4, unk5, unk6, unk7);
uint32_t frontbuffer = SHIM_MEM_32(frontbuffer_ptr);
XELOGD("VdSwap(%.8X, %.8X, %.8X, %.8X, %.8X, %.8X(%.8X), %.8X, %.8X)", unk0,
unk1, unk2, unk3, unk4, frontbuffer_ptr, frontbuffer, unk6, unk7);
// The caller seems to reserve 64 words (256b) in the primary ringbuffer
// for this method to do what it needs. We just zero them out and send a
@@ -385,8 +387,9 @@ SHIM_CALL VdSwap_shim(PPCContext* ppc_state, KernelState* state) {
// use this method.
memset(SHIM_MEM_ADDR(unk0), 0, 64 * 4);
auto dwords = reinterpret_cast<uint32_t*>(SHIM_MEM_ADDR(unk0));
dwords[0] = poly::byte_swap((0x03 << 30) | ((1 - 1) << 16) |
dwords[0] = poly::byte_swap((0x03 << 30) | ((63 - 1) << 16) |
(xe::gpu::xenos::PM4_XE_SWAP << 8));
dwords[1] = poly::byte_swap(frontbuffer);
SHIM_SET_RETURN_64(0);
}