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dsp: Decode all DMA control bits

This commit is contained in:
Jannik Vogel 2018-12-27 00:11:56 +01:00 committed by espes
parent e3a93c48fb
commit 4513ab50da
1 changed files with 15 additions and 4 deletions
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19
hw/xbox/dsp/dsp_dma.c
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@ -77,13 +77,26 @@ static void dsp_dma_run(DSPDMAState *s)
s->eol = true;
}
/* Decode control word */
bool dsp_interleave = (control >> 0) & 1;
bool direction = control & NODE_CONTROL_DIRECTION;
uint32_t unk2 = (control >> 2) & 0x3;
bool buffer_offset_writeback = (control >> 4) & 1;
uint32_t buf_id = (control >> 5) & 0xf;
bool unk9 = (control >> 9) & 1; /* FIXME: What does this do? */
uint32_t format = (control >> 10) & 0x7;
bool unk13 = (control >> 13) & 1;
uint32_t dsp_step = (control >> 14) & 0x3FF;
/* Check for unhandled control settings */
assert(unk2 == 0x0);
assert(unk13 == false);
DPRINTF("\n\n\nDMA addr %x, control %x, count %x, "
"dsp_offset %x, scratch_offset %x, base %x, size %x\n\n\n",
addr, control, count, dsp_offset,
scratch_offset, scratch_base, scratch_size);
uint32_t format = (control >> 10) & 7;
unsigned int item_size;
uint32_t item_mask = 0xffffffff;
switch(format) {
@ -101,8 +114,6 @@ static void dsp_dma_run(DSPDMAState *s)
break;
}
uint32_t buf_id = (control >> 5) & 0xf;
size_t scratch_addr;
if (buf_id == 0xe) { // 'circular'?
// assert(scratch_offset == 0);
@ -139,7 +150,7 @@ static void dsp_dma_run(DSPDMAState *s)
uint8_t* scratch_buf = calloc(count, item_size);
if (control & NODE_CONTROL_DIRECTION) {
if (direction) {
int i;
for (i=0; i<count; i++) {
uint32_t v = dsp56k_read_memory(s->core,