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|
/* $OpenBSD: if_ec.c,v 1.19 2022/04/06 18:59:28 naddy Exp $ */
/* $NetBSD: if_ec.c,v 1.9 1998/07/05 06:49:12 jonathan Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Device driver for National Semiconductor DS8390/WD83C690 based ethernet
* adapters.
*
* Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved.
*
* Copyright (C) 1993, David Greenman. This software may be used, modified,
* copied, distributed, and sold, in both source and binary form provided that
* the above copyright and these terms are retained. Under no circumstances is
* the author responsible for the proper functioning of this software, nor does
* the author assume any responsibility for damages incurred with its use.
*/
/*
* Device driver for the 3Com Etherlink II (3c503).
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_media.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/ic/dp8390reg.h>
#include <dev/ic/dp8390var.h>
#include <dev/isa/if_ecreg.h>
struct ec_softc {
struct dp8390_softc sc_dp8390;
bus_space_tag_t sc_asict; /* space tag for ASIC */
bus_space_handle_t sc_asich; /* space handle for ASIC */
int sc_16bitp; /* are we 16 bit? */
void *sc_ih; /* interrupt handle */
};
int ec_probe(struct device *, void *, void *);
void ec_attach(struct device *, struct device *, void *);
const struct cfattach ec_ca = {
sizeof(struct ec_softc), ec_probe, ec_attach
};
int ec_set_media(struct ec_softc *, uint64_t);
void ec_media_init(struct dp8390_softc *);
int ec_mediachange(struct dp8390_softc *);
void ec_mediastatus(struct dp8390_softc *, struct ifmediareq *);
void ec_init_card(struct dp8390_softc *);
int ec_write_mbuf(struct dp8390_softc *, struct mbuf *, int);
int ec_ring_copy(struct dp8390_softc *, int, caddr_t, u_short);
void ec_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *);
int ec_fake_test_mem(struct dp8390_softc *);
int ec_test_mem(struct dp8390_softc *);
static __inline void ec_readmem(struct ec_softc *, int, u_int8_t *, int);
static const int ec_iobase[] = {
0x2e0, 0x2a0, 0x280, 0x250, 0x350, 0x330, 0x310, 0x300,
};
#define NEC_IOBASE (sizeof(ec_iobase) / sizeof(ec_iobase[0]))
static const int ec_membase[] = {
MADDRUNK, MADDRUNK, MADDRUNK, MADDRUNK, 0xc8000, 0xcc000,
0xd8000, 0xdc000,
};
#define NEC_MEMBASE (sizeof(ec_membase) / sizeof(ec_membase[0]))
struct cfdriver ec_cd = {
NULL, "ec", DV_IFNET
};
int
ec_probe(struct device *parent, void *match, void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_tag_t nict, asict, memt;
bus_space_handle_t nich, asich, memh;
bus_size_t memsize;
int nich_valid, asich_valid, memh_valid;
int i, rv = 0;
u_int8_t x;
nict = asict = ia->ia_iot;
memt = ia->ia_memt;
nich_valid = asich_valid = memh_valid = 0;
/*
* Hmm, a 16-bit card has 16k of memory, but only an 8k window
* to it.
*/
memsize = 8192;
/* Disallow wildcarded i/o addresses. */
if (ia->ia_iobase == -1 /* ISACF_PORT_DEFAULT */)
return (0);
/* Disallow wildcarded mem address. */
if (ia->ia_maddr == -1 /* ISACF_IOMEM_DEFAULT */)
return (0);
/* Validate the i/o base. */
for (i = 0; i < NEC_IOBASE; i++)
if (ia->ia_iobase == ec_iobase[i])
break;
if (i == NEC_IOBASE)
return (0);
/* Validate the mem base. */
for (i = 0; i < NEC_MEMBASE; i++) {
if (ec_membase[i] == MADDRUNK)
continue;
if (ia->ia_maddr == ec_membase[i])
break;
}
if (i == NEC_MEMBASE)
return (0);
/* Attempt to map the NIC space. */
if (bus_space_map(nict, ia->ia_iobase + ELINK2_NIC_OFFSET,
ELINK2_NIC_PORTS, 0, &nich))
goto out;
nich_valid = 1;
/* Attempt to map the ASIC space. */
if (bus_space_map(asict, ia->ia_iobase + ELINK2_ASIC_OFFSET,
ELINK2_ASIC_PORTS, 0, &asich))
goto out;
asich_valid = 1;
/* Attempt to map the memory space. */
if (bus_space_map(memt, ia->ia_maddr, memsize, 0, &memh))
goto out;
memh_valid = 1;
/*
* Verify that the kernel configured I/O address matches the
* board configured I/O address.
*
* This is really only useful to see if something that looks like
* the board is there; after all, we're already talking to it at
* this point.
*/
x = bus_space_read_1(asict, asich, ELINK2_BCFR);
if (x == 0 || (x & (x - 1)) != 0)
goto out;
i = ffs(x) - 1;
if (ia->ia_iobase != ec_iobase[i])
goto out;
/*
* ...and for the memory address. Note we do not support
* cards configured with shared memory disabled.
*/
x = bus_space_read_1(asict, asich, ELINK2_PCFR);
if (x == 0 || (x & (x - 1)) != 0)
goto out;
i = ffs(x) - 1;
if (ia->ia_maddr != ec_membase[i])
goto out;
/* So, we say we've found it! */
ia->ia_iosize = ELINK2_NIC_PORTS;
ia->ia_msize = memsize;
rv = 1;
out:
if (nich_valid)
bus_space_unmap(nict, nich, ELINK2_NIC_PORTS);
if (asich_valid)
bus_space_unmap(asict, asich, ELINK2_ASIC_PORTS);
if (memh_valid)
bus_space_unmap(memt, memh, memsize);
return (rv);
}
void
ec_attach(struct device *parent, struct device *self, void *aux)
{
struct ec_softc *esc = (struct ec_softc *)self;
struct dp8390_softc *sc = &esc->sc_dp8390;
struct isa_attach_args *ia = aux;
bus_space_tag_t nict, asict, memt;
bus_space_handle_t nich, asich, memh;
bus_size_t memsize;
u_int8_t tmp;
int i;
printf("\n");
nict = asict = ia->ia_iot;
memt = ia->ia_memt;
/*
* Hmm, a 16-bit card has 16k of memory, but only an 8k window
* to it.
*/
memsize = 8192;
/* Map the NIC space. */
if (bus_space_map(nict, ia->ia_iobase + ELINK2_NIC_OFFSET,
ELINK2_NIC_PORTS, 0, &nich)) {
printf("%s: can't map nic i/o space\n",
sc->sc_dev.dv_xname);
return;
}
/* Map the ASIC space. */
if (bus_space_map(asict, ia->ia_iobase + ELINK2_ASIC_OFFSET,
ELINK2_ASIC_PORTS, 0, &asich)) {
printf("%s: can't map asic i/o space\n",
sc->sc_dev.dv_xname);
return;
}
/* Map the memory space. */
if (bus_space_map(memt, ia->ia_maddr, memsize, 0, &memh)) {
printf("%s: can't map shared memory\n",
sc->sc_dev.dv_xname);
return;
}
esc->sc_asict = asict;
esc->sc_asich = asich;
sc->sc_regt = nict;
sc->sc_regh = nich;
sc->sc_buft = memt;
sc->sc_bufh = memh;
/* Interface is always enabled. */
sc->sc_enabled = 1;
/* Registers are linear. */
for (i = 0; i < 16; i++)
sc->sc_reg_map[i] = i;
/* Now we can use the NIC_{GET,PUT}() macros. */
/*
* Reset NIC and ASIC. Enable on-board transceiver throughout
* reset sequence since it will lock up if the cable isn't
* connected if we don't.
*/
bus_space_write_1(asict, asich, ELINK2_CR,
ELINK2_CR_RST | ELINK2_CR_XSEL);
/* Wait for a while, then un-reset it. */
delay(50);
/*
* The 3Com ASIC defaults to rather strange settings for the CR
* after a reset. It's important to set it again after the
* following write (this is done when we map the PROM below).
*/
bus_space_write_1(asict, asich, ELINK2_CR, ELINK2_CR_XSEL);
/* Wait a bit for the NIC to recover from the reset. */
delay(5000);
/*
* Get the station address from on-board ROM.
*
* First, map Ethernet address PROM over the top of where the NIC
* registers normally appear.
*/
bus_space_write_1(asict, asich, ELINK2_CR,
ELINK2_CR_XSEL | ELINK2_CR_EALO);
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->sc_arpcom.ac_enaddr[i] = NIC_GET(nict, nich, i);
/*
* Unmap PROM - select NIC registers. The proper setting of the
* transceiver is set in later in ec_init_card() via dp8390_init().
*/
bus_space_write_1(asict, asich, ELINK2_CR, ELINK2_CR_XSEL);
/* Determine if this is an 8-bit or 16-bit board. */
/* Select page 0 registers. */
NIC_PUT(nict, nich, ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
/*
* Attempt to clear WTS. If it doesn't clear, then this is a
* 16-bit board.
*/
NIC_PUT(nict, nich, ED_P0_DCR, 0);
/* Select page 2 registers. */
NIC_PUT(nict, nich, ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_2 | ED_CR_STP);
/* The 3c503 forces the WTS bit to a one if this is a 16-bit board. */
if (NIC_GET(nict, nich, ED_P2_DCR) & ED_DCR_WTS)
esc->sc_16bitp = 1;
else
esc->sc_16bitp = 0;
printf("%s: 3Com 3c503 Ethernet (%s-bit)",
sc->sc_dev.dv_xname, esc->sc_16bitp ? "16" : "8");
/* Select page 0 registers. */
NIC_PUT(nict, nich, ED_P2_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
sc->cr_proto = ED_CR_RD2;
/*
* DCR gets:
*
* FIFO threshold to 8, No auto-init Remote DMA,
* byte order=80x86.
*
* 16-bit cards also get word-wide DMA transfers.
*/
sc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS |
(esc->sc_16bitp ? ED_DCR_WTS : 0);
sc->test_mem = ec_fake_test_mem;
sc->ring_copy = ec_ring_copy;
sc->write_mbuf = ec_write_mbuf;
sc->read_hdr = ec_read_hdr;
sc->sc_media_init = ec_media_init;
sc->sc_mediachange = ec_mediachange;
sc->sc_mediastatus = ec_mediastatus;
sc->mem_start = 0;
sc->mem_size = memsize;
/* Do generic parts of attach. */
if (dp8390_config(sc)) {
printf(": configuration failed\n");
return;
}
/*
* We need to override the way dp8390_config() set up our
* shared memory.
*
* We have an entire 8k window to put the transmit buffers on the
* 16-bit boards. But since the 16bit 3c503's shared memory is only
* fast enough to overlap the loading of one full-size packet, trying
* to load more than 2 buffers can actually leave the transmitter idle
* during the load. So 2 seems the best value. (Although a mix of
* variable-sized packets might change this assumption. Nonetheless,
* we optimize for linear transfers of same-size packets.)
*/
if (esc->sc_16bitp) {
if (sc->sc_dev.dv_cfdata->cf_flags & DP8390_NO_MULTI_BUFFERING)
sc->txb_cnt = 1;
else
sc->txb_cnt = 2;
sc->tx_page_start = ELINK2_TX_PAGE_OFFSET_16BIT;
sc->rec_page_start = ELINK2_RX_PAGE_OFFSET_16BIT;
sc->rec_page_stop = (memsize >> ED_PAGE_SHIFT) +
sc->rec_page_start;
sc->mem_ring = sc->mem_start;
} else {
sc->txb_cnt = 1;
sc->tx_page_start = ELINK2_TX_PAGE_OFFSET_8BIT;
sc->rec_page_start = sc->tx_page_start + ED_TXBUF_SIZE;
sc->rec_page_stop = (memsize >> ED_PAGE_SHIFT) +
sc->tx_page_start;
sc->mem_ring = sc->mem_start +
(ED_TXBUF_SIZE << ED_PAGE_SHIFT);
}
/*
* Initialize CA page start/stop registers. Probably only needed
* if doing DMA, but what the Hell.
*/
bus_space_write_1(asict, asich, ELINK2_PSTR, sc->rec_page_start);
bus_space_write_1(asict, asich, ELINK2_PSPR, sc->rec_page_stop);
/*
* Program the IRQ.
*/
switch (ia->ia_irq) {
case 9: tmp = ELINK2_IDCFR_IRQ2; break;
case 3: tmp = ELINK2_IDCFR_IRQ3; break;
case 4: tmp = ELINK2_IDCFR_IRQ4; break;
case 5: tmp = ELINK2_IDCFR_IRQ5; break;
break;
case IRQUNK:
printf("%s: wildcarded IRQ is not allowed\n",
sc->sc_dev.dv_xname);
return;
default:
printf("%s: invalid IRQ %d, must be 3, 4, 5, or 9\n",
sc->sc_dev.dv_xname, ia->ia_irq);
return;
}
bus_space_write_1(asict, asich, ELINK2_IDCFR, tmp);
/*
* Initialize the GA configuration register. Set bank and enable
* shared memory.
*/
bus_space_write_1(asict, asich, ELINK2_GACFR,
ELINK2_GACFR_RSEL | ELINK2_GACFR_MBS0);
/*
* Initialize "Vector Pointer" registers. These gawd-awful things
* are compared to 20 bits of the address on the ISA, and if they
* match, the shared memory is disabled. We se them to 0xffff0...
* allegedly the reset vector.
*/
bus_space_write_1(asict, asich, ELINK2_VPTR2, 0xff);
bus_space_write_1(asict, asich, ELINK2_VPTR1, 0xff);
bus_space_write_1(asict, asich, ELINK2_VPTR0, 0x00);
/*
* Now run the real memory test.
*/
if (ec_test_mem(sc)) {
printf("%s: memory test failed\n", sc->sc_dev.dv_xname);
return;
}
/* Establish interrupt handler. */
esc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
IPL_NET, dp8390_intr, sc, sc->sc_dev.dv_xname);
if (esc->sc_ih == NULL)
printf("%s: can't establish interrupt\n", sc->sc_dev.dv_xname);
}
int
ec_fake_test_mem(struct dp8390_softc *sc)
{
/*
* We have to do this after we initialize the GA, but we
* have to do that after calling dp8390_config(), which
* wants to test memory. Put this noop here, and then
* actually test memory later.
*/
return (0);
}
int
ec_test_mem(struct dp8390_softc *sc)
{
struct ec_softc *esc = (struct ec_softc *)sc;
bus_space_tag_t memt = sc->sc_buft;
bus_space_handle_t memh = sc->sc_bufh;
bus_size_t memsize = sc->mem_size;
int i;
if (esc->sc_16bitp)
bus_space_set_region_2(memt, memh, 0, 0, memsize >> 1);
else
bus_space_set_region_1(memt, memh, 0, 0, memsize);
if (esc->sc_16bitp) {
for (i = 0; i < memsize; i += 2) {
if (bus_space_read_2(memt, memh, i) != 0)
goto fail;
}
} else {
for (i = 0; i < memsize; i++) {
if (bus_space_read_1(memt, memh, i) != 0)
goto fail;
}
}
return (0);
fail:
printf("%s: failed to clear shared memory at offset 0x%x\n",
sc->sc_dev.dv_xname, i);
return (1);
}
/*
* Given a NIC memory source address and a host memory destination address,
* copy 'len' from NIC to host using shared memory. The 'len' is rounded
* up to a word - ok as long as mbufs are word-sized.
*/
static __inline void
ec_readmem(struct ec_softc *esc, int from, u_int8_t *to, int len)
{
bus_space_tag_t memt = esc->sc_dp8390.sc_buft;
bus_space_handle_t memh = esc->sc_dp8390.sc_bufh;
if (len & 1)
++len;
if (esc->sc_16bitp)
bus_space_read_region_2(memt, memh, from, (u_int16_t *)to,
len >> 1);
else
bus_space_read_region_1(memt, memh, from, to, len);
}
int
ec_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf)
{
struct ec_softc *esc = (struct ec_softc *)sc;
bus_space_tag_t asict = esc->sc_asict;
bus_space_handle_t asich = esc->sc_asich;
bus_space_tag_t memt = esc->sc_dp8390.sc_buft;
bus_space_handle_t memh = esc->sc_dp8390.sc_bufh;
u_int8_t *data, savebyte[2];
int savelen, len, leftover;
#ifdef DIAGNOSTIC
u_int8_t *lim;
#endif
savelen = m->m_pkthdr.len;
/*
* 8-bit boards are simple: we're already in the correct
* page, and no alignment tricks are necessary.
*/
if (esc->sc_16bitp == 0) {
for (; m != NULL; buf += m->m_len, m = m->m_next)
bus_space_write_region_1(memt, memh, buf,
mtod(m, u_int8_t *), m->m_len);
return (savelen);
}
/*
* If it's a 16-bit board, we have transmit buffers
* in a different page; switch to it.
*/
if (esc->sc_16bitp)
bus_space_write_1(asict, asich, ELINK2_GACFR,
ELINK2_GACFR_RSEL);
/* Start out with no leftover data. */
leftover = 0;
savebyte[0] = savebyte[1] = 0;
for (; m != NULL; m = m->m_next) {
len = m->m_len;
if (len == 0)
continue;
data = mtod(m, u_int8_t *);
#ifdef DIAGNOSTIC
lim = data + len;
#endif
while (len > 0) {
if (leftover) {
/*
* Data left over (from mbuf or realignment).
* Buffer the next byte, and write it and
* the leftover data out.
*/
savebyte[1] = *data++;
len--;
bus_space_write_2(memt, memh, buf,
*(u_int16_t *)savebyte);
buf += 2;
leftover = 0;
} else if (ALIGNED_POINTER(data, u_int16_t) == 0) {
/*
* Unaligned data; buffer the next byte.
*/
savebyte[0] = *data++;
len--;
leftover = 1;
} else {
/*
* Aligned data; output contiguous words as
* much as we can, then buffer the remaining
* byte, if any.
*/
leftover = len & 1;
len &= ~1;
bus_space_write_region_2(memt, memh, buf,
(u_int16_t *)data, len >> 1);
data += len;
buf += len;
if (leftover)
savebyte[0] = *data++;
len = 0;
}
}
if (len < 0)
panic("ec_write_mbuf: negative len");
#ifdef DIAGNOSTIC
if (data != lim)
panic("ec_write_mbuf: data != lim");
#endif
}
if (leftover) {
savebyte[1] = 0;
bus_space_write_2(memt, memh, buf, *(u_int16_t *)savebyte);
}
/*
* Switch back to receive page.
*/
if (esc->sc_16bitp)
bus_space_write_1(asict, asich, ELINK2_GACFR,
ELINK2_GACFR_RSEL | ELINK2_GACFR_MBS0);
return (savelen);
}
int
ec_ring_copy(struct dp8390_softc *sc, int src, caddr_t dst,
u_short amount)
{
struct ec_softc *esc = (struct ec_softc *)sc;
u_short tmp_amount;
/* Does copy wrap to lower addr in ring buffer? */
if (src + amount > sc->mem_end) {
tmp_amount = sc->mem_end - src;
/* Copy amount up to end of NIC memory. */
ec_readmem(esc, src, dst, tmp_amount);
amount -= tmp_amount;
src = sc->mem_ring;
dst += tmp_amount;
}
ec_readmem(esc, src, dst, amount);
return (src + amount);
}
void
ec_read_hdr(struct dp8390_softc *sc, int packet_ptr,
struct dp8390_ring *packet_hdrp)
{
struct ec_softc *esc = (struct ec_softc *)sc;
ec_readmem(esc, packet_ptr, (u_int8_t *)packet_hdrp,
sizeof(struct dp8390_ring));
#if BYTE_ORDER == BIG_ENDIAN
packet_hdrp->count = swap16(packet_hdrp->count);
#endif
}
void
ec_media_init(struct dp8390_softc *sc)
{
ifmedia_init(&sc->sc_media, 0, dp8390_mediachange, dp8390_mediastatus);
ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_10_2, 0, NULL);
ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_10_5, 0, NULL);
ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_10_2);
}
int
ec_mediachange(struct dp8390_softc *sc)
{
struct ec_softc *esc = (struct ec_softc *)sc;
struct ifmedia *ifm = &sc->sc_media;
return (ec_set_media(esc, ifm->ifm_media));
}
void
ec_mediastatus(struct dp8390_softc *sc, struct ifmediareq *ifmr)
{
struct ifmedia *ifm = &sc->sc_media;
/*
* The currently selected media is always the active media.
*/
ifmr->ifm_active = ifm->ifm_cur->ifm_media;
}
void
ec_init_card(struct dp8390_softc *sc)
{
struct ec_softc *esc = (struct ec_softc *)sc;
struct ifmedia *ifm = &sc->sc_media;
(void) ec_set_media(esc, ifm->ifm_cur->ifm_media);
}
int
ec_set_media(struct ec_softc *esc, uint64_t media)
{
u_int8_t new;
if (IFM_TYPE(media) != IFM_ETHER)
return (EINVAL);
switch (IFM_SUBTYPE(media)) {
case IFM_10_2:
new = ELINK2_CR_XSEL;
break;
case IFM_10_5:
new = 0;
break;
default:
return (EINVAL);
}
bus_space_write_1(esc->sc_asict, esc->sc_asich, ELINK2_CR, new);
return (0);
}
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