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pi: Fix PI DMA length alignment

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Fixes Yoshi's Story, F-1 World Grand Prix and probably many other games
This commit is contained in:
Simon Eriksson 2021-03-09 22:20:12 +01:00
parent deda9f9709
commit 9316569eff
1 changed files with 6 additions and 6 deletions
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12
pi/controller.c
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@ -55,11 +55,11 @@ void pi_cycle_(struct pi_controller *pi) {
// Copies data from RDRAM to the PI
static int pi_dma_read(struct pi_controller *pi) {
uint32_t dest = pi->regs[PI_CART_ADDR_REG] & 0xFFFFFFE;
uint32_t source = pi->regs[PI_DRAM_ADDR_REG] & 0x7FFFFF;
uint32_t source = pi->regs[PI_DRAM_ADDR_REG] & 0x7FFFF8;
uint32_t length = (pi->regs[PI_RD_LEN_REG] & 0xFFFFFF) + 1;
if (length & 7)
length = (length + 7) & ~7;
if (length & 1)
length = (length + 1) & ~1;
// SRAM and FlashRAM
if (dest >= 0x08000000 && dest < 0x08010000) {
@ -84,12 +84,12 @@ static int pi_dma_read(struct pi_controller *pi) {
// Copies data from the the PI into RDRAM.
static int pi_dma_write(struct pi_controller *pi) {
uint32_t dest = pi->regs[PI_DRAM_ADDR_REG] & 0x7FFFFF;
uint32_t dest = pi->regs[PI_DRAM_ADDR_REG] & 0x7FFFF8;
uint32_t source = pi->regs[PI_CART_ADDR_REG] & 0xFFFFFFE;
uint32_t length = (pi->regs[PI_WR_LEN_REG] & 0xFFFFFF) + 1;
if (length & 7)
length = (length + 7) & ~7;
if (length & 1)
length = (length + 1) & ~1;
if (pi->bus->dd->ipl_rom && (source & 0x06000000) == 0x06000000) {
source &= 0x003FFFFF;