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#define MOD_NAME "dma"
#include <stddef.h>
#include "log.h"
#include "sgdma.h"
struct sgdma_ctrl
{
unsigned start_busy : 1;
unsigned interrupt : 1;
unsigned int_en : 1;
unsigned abort : 1;
unsigned err : 1;
unsigned reserved : 27;
};
struct sgdma_entry
{
unsigned src_lo;
unsigned src_hi : 30;
unsigned flags : 2;
unsigned dst_lo;
unsigned dst_hi : 30;
unsigned mbz : 1;
unsigned int_en : 1;
unsigned length;
};
// axisgfsm.v, la lista de axisgdma.v está mala
enum sgdma_entry_flags
{
SGDMA_ENTRY_CONT = 0b00,
SGDMA_ENTRY_LAST = 0b01,
SGDMA_ENTRY_SKIP = 0b10,
SGDMA_ENTRY_JUMP = 0b11,
};
#define SGDMA_BASE 0x28000000
#define SGDMA_CTRL (*(volatile struct sgdma_ctrl *)(SGDMA_BASE + 0x00))
#define SGDMA_TBLLO (*(volatile unsigned *) (SGDMA_BASE + 0x08))
#define SGDMA_TBLHI (*(volatile unsigned *) (SGDMA_BASE + 0x0c))
int sgdma_done(void)
{
return !SGDMA_CTRL.start_busy;
}
void sgdma_barrier(void)
{
while (!sgdma_done()); //FIXME
}
void sgdma_memcpy(void *dest, const void *src, size_t len)
{
struct sgdma_entry entry = {
.src_lo = (unsigned)src,
.src_hi = 0,
.flags = SGDMA_ENTRY_LAST,
.dst_lo = (unsigned)dest,
.dst_hi = 0,
.mbz = 0,
.int_en = 0,
.length = (unsigned)len,
};
SGDMA_TBLLO = (unsigned)&entry;
SGDMA_TBLHI = 0;
struct sgdma_ctrl ctrl = {
.start_busy = 1,
.interrupt = 0,
.int_en = 0,
.abort = 0,
.err = 0,
.reserved = 0,
};
SGDMA_CTRL = ctrl;
sgdma_barrier(); //TODO, sin esto sgdma lee entry corrupto
}
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