/* Disable all system interrupts here and return a value that can
* be used by intsrestore() (later) to restore the interrupt state.
*/
ulong
intsoff(void)
{
ulong status = getpsr();
putpsr(status | 0xC0);
return(status);
}
int
islo(void)
{
int val;
val = (getpsr()&SPL(15)) == 0;
return val;
}
void
cpuidprint(void)
{
char name[64];
cputype2name(name, sizeof name);
delay(50); /* let uart catch up */
iprint("cpu%d: %lldMHz ARM %s %s-endian\n",
m->machno, m->cpuhz / Mhz, name,
getpsr() & PsrBigend? "big": "little");
}
void
mtx_enter(struct mutex *mtx)
{
int psr;
if (mtx->mtx_wantipl != IPL_NONE << 8) {
psr = getpsr();
mtx->mtx_oldipl = psr & PSR_PIL;
if (mtx->mtx_oldipl < mtx->mtx_wantipl)
setpsr((psr & ~PSR_PIL) | mtx->mtx_wantipl);
}
MUTEX_ASSERT_UNLOCKED(mtx);
mtx->mtx_lock = 1;
}
void
mtx_enter(struct mutex *mtx)
{
int psr;
if (mtx->mtx_wantipl != IPL_NONE << 8) {
psr = getpsr();
mtx->mtx_oldipl = psr & PSR_PIL;
if (mtx->mtx_oldipl < mtx->mtx_wantipl)
setpsr((psr & ~PSR_PIL) | mtx->mtx_wantipl);
}
MUTEX_ASSERT_UNLOCKED(mtx);
mtx->mtx_lock = 1;
#ifdef DIAGNOSTIC
curcpu()->ci_mutex_level++;
#endif
}
int devlogicalnoc_xmit_sleep(uchar dst, uchar src_logical_addr, uchar* data,
int nbytes, unsigned int sleep)
{
int framesize;
int i;
uchar *tptr;
ulong ifc_shift_offset = (0 & 0xFFF) << 4;
ulong savedSR;
//@@printf("in devnet_xmit, sending [%d] bytes to [%s], proto [%d], via ifc [%d]\n", nbytes, dst, proto, whichifc);
/* Save SR, then disable intrs: */
savedSR = getpsr();
splhi();
/* Save the dst for future use */
*(NIC_DST + ifc_shift_offset) = dst;
framesize = devnet_getmaxfsz(0);
framesize -= 1;//one information byte
// Write data
tptr = data;
while (nbytes > 0)
{
*(NIC_TDR + ifc_shift_offset) = src_logical_addr;//socket information flit
for (i = 0; i < min(nbytes, framesize); i++)
{
*(NIC_TDR + ifc_shift_offset) = *tptr++;
}
if (nbytes < framesize)
devmac_ctl(NIC_NCR_WRITE, NIC_CMD_TRANSMIT, 0);
//failed to send, do it again
while ((*(NIC_NSR + ifc_shift_offset)) & 0x1)
{
//printf("Failed to send %d \n", dst);
devmac_ctl(NIC_NCR_WRITE, NIC_CMD_TRANSMIT, 0);
}
//printf("sending: n = %d, f = %d %d\n", nbytes, i, dst);
nbytes -= i;
}
//send closing link message
if (sleep > 0)
{
*(NIC_TDR + ifc_shift_offset) = (1 << 7);
*(NIC_TDR + ifc_shift_offset) = (sleep) & 0xFF;
*(NIC_TDR + ifc_shift_offset) = (sleep >> 8) & 0xFF;
*(NIC_TDR + ifc_shift_offset) = (sleep >> 16) & 0xFF;
*(NIC_TDR + ifc_shift_offset) = (sleep >> 24) & 0xFF;
devmac_ctl(NIC_NCR_WRITE, NIC_CMD_TRANSMIT, 0);
//failed to send, do it again
while ((*(NIC_NSR + ifc_shift_offset)) & 0x1)
{
devmac_ctl(NIC_NCR_WRITE, NIC_CMD_TRANSMIT, 0);
}
}
int devnet_xmit(uchar *dst, uchar proto, uchar *data, int nbytes, int whichifc)
{
int framesize;
int n = 0, i;
uchar *tptr;
ulong ifc_shift_offset = (whichifc & 0xFFF) << 4;
ulong savedSR;
//@@printf("in devnet_xmit, sending [%d] bytes to [%s], proto [%d], via ifc [%d]\n", nbytes, dst, proto, whichifc);
/* Save SR, then disable intrs: */
savedSR = getpsr();
splhi();
/* Save the dst for future use */
for (i = 0; i < 16; i++)
{
*(NIC_DST + ifc_shift_offset + i) = *(dst + i);
}
/* Write 16 byte src_addr */
for (i = 0; i < 16; i++)
{
*(NIC_TDR + ifc_shift_offset) = *(NIC_OUI + i);
}
n += 16;
/* Write 16 byte dst_addr */
for (i = 0; i < 16; i++)
{
*(NIC_TDR + ifc_shift_offset) = *(dst + i);
//printf("devnet_xmit(), *(dst+i) = [%d]\n", *(dst+i));
}
n += 16;
/* Write 4 byte payloadlen */
*(NIC_TDR + ifc_shift_offset) = (nbytes >> 24) & 0xFF;
*(NIC_TDR + ifc_shift_offset) = (nbytes >> 16) & 0xFF;
*(NIC_TDR + ifc_shift_offset) = (nbytes >> 8) & 0xFF;
*(NIC_TDR + ifc_shift_offset) = (nbytes >> 0) & 0xFF;
n += 4;
/* Write 1 byte nexthdr */
*(NIC_TDR + ifc_shift_offset) = proto;
n += 1;
/* */
/* The 32 bit cksum added by hw */
/* is not counted as part of fsz */
/* */
framesize = devnet_getmaxfsz(whichifc);
/* Write data */
tptr = data;
for (i = 0; (i < nbytes) && (n < framesize); i++)
{
*(NIC_TDR + ifc_shift_offset) = *tptr++;
n++;
}
/* if nbytes+header size was more than a frame, recurse */
if (nbytes + 16 + 16 + 4 + 1 > framesize)
{
printf(
"Warning!!! devnet_xmit recursing: nbytes+header = %d, framesize = %d\n",
nbytes + 16 + 16 + 4 + 1, framesize);
devnet_xmit(dst, proto, tptr, nbytes - i, whichifc);
} else
while (n < framesize)
{
/* Send padding */
*(NIC_TDR + ifc_shift_offset) = 0;
n++;
}
/* Restore SR */
spldone(savedSR);
/* */
/* If frame could'nt be sent, LSB */
/* of NIC_NSR will be 1, return -1 */
/* */
return -((*(NIC_NSR + ifc_shift_offset)) & 0x1);
}
//BUG: we curretnly make the mac layer pass in the length of the destination address, so we can support multiple
// mac layers with different address sizes. Currently, the simulator maintains a 16+1 (NIC_ADDR_LEN) character
// string format address. When the MAC layer probes the NIC_OUI, it currently gets a string, which is
// fine for now, but we neeed to clean this implementation up
int
devmac_xmit(uchar *dst, int dstaddrlen, uchar *header, uchar *data, int headerlen, int nbytes, int whichifc)
{
int max_framesize;
int n = 0, i;
uchar frame_cksum[2];
ulong ifc_shift_offset = (whichifc & 0xFFF) << 4;
ulong savedSR;
//print("in devmac_xmit, sending [%d] bytes to [%s], proto [%d], via ifc [%d]\n", nbytes, dst, proto, whichifc);
/* Save SR, then disable intrs: */
savedSR = getpsr();
splhi();
/* */
/* The 32 bit cksum added by hw */
/* is not counted as part of fsz */
/* */
max_framesize = devmac_getmaxfsz(whichifc);
/* Save the dst for future use */
for (i = 0; i < min(16, dstaddrlen); i++)
{
*(NIC_DST+ifc_shift_offset+i) = dst[i];
}
*(NIC_DST+ifc_shift_offset+i) = '\0';
/* Write MAC layer header */
for (i = 0; i < headerlen && (n < max_framesize); i++)
{
*(NIC_TDR+ifc_shift_offset) = header[i];
n++;
}
/* Write data */
for (i = 0; (i < nbytes) && (n < max_framesize); i++)
{
*(NIC_TDR+ifc_shift_offset) = data[i];
n++;
}
/* Write checksum */
devmac_cksum(header, data, headerlen, nbytes, &frame_cksum[0]);
for (i = 0; i < 2; i++)
{
*(NIC_TDR+ifc_shift_offset) = frame_cksum[i];
n++;
}
/* */
/* The current frame size is calculated from */
/* number of bytes in the TDR at this point */
/* */
devmac_ctl(NIC_NCR_WRITE, NIC_CMD_TRANSMIT, whichifc);
/* Restore SR */
spldone(savedSR);
/* */
/* If frame could'nt be sent, LSB */
/* of NIC_NSR will be 1, return -1 */
/* */
return -((*(NIC_NSR+ifc_shift_offset)) & 0x1);
}