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Banjo Kazooie
2022-07-15 17:09:41 -05:00
commit dd13d34074
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66
src/core1/done/io/epirawdma.c Normal file
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#include <ultra64.h>
#include "functions.h"
#include "variables.h"
extern OSPiHandle *__osCurrentHandle[2];
#define OS_RAMROM_STACKSIZE 1024
#ifndef WAIT_ON_IOBUSY
#define WAIT_ON_IOBUSY(stat) \
stat = IO_READ(PI_STATUS_REG); \
while (stat & (PI_STATUS_IO_BUSY | PI_STATUS_DMA_BUSY)) \
stat = IO_READ(PI_STATUS_REG);
#endif
#define UPDATE_REG(reg, var) \
if (cHandle->var != pihandle->var) \
IO_WRITE(reg, pihandle->var);
#define EPI_SYNC(pihandle, stat, domain) \
\
WAIT_ON_IOBUSY(stat) \
\
domain = pihandle->domain; \
if (__osCurrentHandle[domain] != pihandle) \
{ \
OSPiHandle *cHandle = __osCurrentHandle[domain]; \
if (domain == PI_DOMAIN1) \
{ \
UPDATE_REG(PI_BSD_DOM1_LAT_REG, latency); \
UPDATE_REG(PI_BSD_DOM1_PGS_REG, pageSize); \
UPDATE_REG(PI_BSD_DOM1_RLS_REG, relDuration); \
UPDATE_REG(PI_BSD_DOM1_PWD_REG, pulse); \
} \
else \
{ \
UPDATE_REG(PI_BSD_DOM2_LAT_REG, latency); \
UPDATE_REG(PI_BSD_DOM2_PGS_REG, pageSize); \
UPDATE_REG(PI_BSD_DOM2_RLS_REG, relDuration); \
UPDATE_REG(PI_BSD_DOM2_PWD_REG, pulse); \
} \
__osCurrentHandle[domain] = pihandle; \
}
s32 osEPiRawStartDma(OSPiHandle *pihandle, s32 direction, u32 devAddr, void *dramAddr, u32 size)
{
u32 stat;
u32 domain;
EPI_SYNC(pihandle, stat, domain);
IO_WRITE(PI_DRAM_ADDR_REG, osVirtualToPhysical(dramAddr));
IO_WRITE(PI_CART_ADDR_REG, K1_TO_PHYS(pihandle->baseAddress | devAddr));
switch (direction)
{
case OS_READ:
IO_WRITE(PI_WR_LEN_REG, size - 1);
break;
case OS_WRITE:
IO_WRITE(PI_RD_LEN_REG, size - 1);
break;
default:
return -1;
}
return 0;
}