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struct hostif_ctrl
{
unsigned arint : 1;
unsigned awint : 1;
unsigned rsvd2 : 6;
unsigned arvalid : 1;
unsigned awvalid : 1;
unsigned rdone : 1;
unsigned wvalid : 1;
unsigned bdone : 1;
unsigned rsvd13 : 19;
};
struct hostif_ar
{
unsigned valid : 1;
unsigned rsvd1 : 1;
unsigned addr : 30;
};
struct hostif_aw
{
unsigned valid : 1;
unsigned rsvd1 : 1;
unsigned addr : 30;
};
struct hostif_r
{
unsigned data : 32;
};
struct hostif_w
{
unsigned data : 32;
};
struct hostif_b0
{
unsigned valid : 1;
unsigned rsvd1 : 31;
};
#define HOSTIF_BASE 0x00300000
#define HOSTIF_CTRL (*(volatile struct hostif_ctrl *)(HOSTIF_BASE + 0x00))
#define HOSTIF_AR (*(volatile struct hostif_ar *) (HOSTIF_BASE + 0x04))
#define HOSTIF_AW (*(volatile struct hostif_aw *) (HOSTIF_BASE + 0x08))
#define HOSTIF_R (*(volatile struct hostif_r *) (HOSTIF_BASE + 0x0c))
#define HOSTIF_W (*(volatile struct hostif_w *) (HOSTIF_BASE + 0x10))
#define HOSTIF_B (*(volatile struct hostif_b *) (HOSTIF_BASE + 0x14))
int main(unsigned magic, unsigned hw_rev)
{
while (1) {
struct hostif_ar ar;
while (!(ar = HOSTIF_AR).valid);
switch (ar.addr & 3) {
case 0b00:
HOSTIF_R.data = magic;
break;
case 0b01:
HOSTIF_R.data = hw_rev;
break;
case 0b10:
HOSTIF_R.data = hw_rev;
break;
case 0b11:
HOSTIF_R.data = 1;
break;
}
while (!HOSTIF_CTRL.rdone);
}
}
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