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Add some comments in preparation for converting bcopy/bzero to busspace.

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Minor style nits.
This commit is contained in:
imp 2005-02-14 06:27:23 +00:00
parent b04bebb194
commit 61436f1df3
1 changed files with 14 additions and 9 deletions
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17
sys/dev/ed/if_ed.c
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@ -714,13 +714,11 @@ ed_start(struct ifnet *ifp)
buffer = sc->mem_start + (sc->txb_new * ED_TXBUF_SIZE * ED_PAGE_SIZE);
if (sc->mem_shared) {
/*
* Special case setup for 16 bit boards...
*/
if (sc->isa16bit) {
switch (sc->vendor) {
/*
* For 16bit 3Com boards (which have 16k of
* memory), we have the xmit buffers in a
@ -739,13 +737,16 @@ ed_start(struct ifnet *ifp)
case ED_VENDOR_WD_SMC:
ed_asic_outb(sc, ED_WD_LAAR,
sc->wd_laar_proto | ED_WD_LAAR_M16EN);
if (sc->chip_type == ED_CHIP_TYPE_WD790) {
if (sc->chip_type == ED_CHIP_TYPE_WD790)
ed_asic_outb(sc, ED_WD_MSR, ED_WD_MSR_MENB);
}
break;
}
}
for (len = 0; m != 0; m = m->m_next) {
/* XXX
* I'm not sure that this bcopy does only 16bit
* access
*/
bcopy(mtod(m, caddr_t), buffer, m->m_len);
buffer += m->m_len;
len += m->m_len;
@ -761,9 +762,8 @@ ed_start(struct ifnet *ifp)
ED_3COM_GACFR_RSEL | ED_3COM_GACFR_MBS0);
break;
case ED_VENDOR_WD_SMC:
if (sc->chip_type == ED_CHIP_TYPE_WD790) {
if (sc->chip_type == ED_CHIP_TYPE_WD790)
ed_asic_outb(sc, ED_WD_MSR, 0x00);
}
ed_asic_outb(sc, ED_WD_LAAR,
sc->wd_laar_proto & ~ED_WD_LAAR_M16EN);
break;
@ -1287,6 +1287,9 @@ ed_ring_copy(struct ed_softc *sc, char *src, char *dst, u_short amount)
if (src + amount > sc->mem_end) {
tmp_amount = sc->mem_end - src;
/* XXX
* I'm not sure that this bcopy does only 16bit access
*/
/* copy amount up to end of NIC memory */
if (sc->mem_shared)
bcopy(src, dst, tmp_amount);
@ -1785,6 +1788,8 @@ ed_clear_memory(device_t dev)
/*
* Now zero memory and verify that it is clear
* XXX restricted to 16-bit writes? Do we need to
* XXX enable 16-bit access?
*/
bzero(sc->mem_start, sc->mem_size);