Broadcom的ADSL CPE(用户端)芯片
ADSL系统分为局端(CO )和用户端(CPE )两大部分,以下主要分析BCM在用户端的解决方案,也就是我们家里的宽带猫,除了硬件芯片外,Broadcom还提供了包括几乎全部软件甚至网页在内的完整解决方案,也就是所谓的turnkey,只要你买好芯片,再找个工厂就可以出货了:(
Broadcom的软件解决方案基于Linux,大部分代码也都开放了源码,除了和部分芯片相关的操作,这些被封装在一些.o里面供用户调用,这也快成IC业界应对开源的惯例了.
broadcom的ADSL CPE芯片大致上可分为三代
(1)BCM6335/6345,处理器是类似于Mips 4K的核,140MHZ,SOC支持ADSL,内存接口为SDRAM
(2)BCM6338/BCM6348 ,第一代产品的改进型,主要改进是支持更高速的ADSL2+,BCM6348可以做到256MHZ,BCM6338一般为240MHZ,内存接口仍然为SDRAM
(3)BCM6358/BCM6368 ,貌似处理器内核改进了,也许是Mips 24K,支持到VDSL2,可以跑到300M,内存可以使用DDR SDRAM
kkk@tasklet:~$ telnet 192.168.1.1
Trying 192.168.1.1...
Connected to 192.168.1.1.
Escape character is '^]'.
BCM96358 ADSL Router
Login: admin
Password:
> ps
PID Uid VmSize Stat Command
1 admin 328 S init
2 admin SWN [ksoftirqd/0]
3 admin SW< [events/0]
4 admin SW< [khelper]
5 admin SW< [kblockd/0]
6 admin SW [khubd]
20 admin SW [pdflush]
21 admin SW [pdflush]
22 admin SW [kswapd0]
23 admin SW< [aio/0]
28 admin SW [mtdblockd]
45 admin 372 S -sh
83 admin 1724 S cfm
213 admin 260 S pvc2684d
533 admin 368 S lld2d br0
537 admin 780 S wsccmd
539 admin 184 S wps_btn
540 admin 780 S wsccmd
541 admin 780 S wsccmd
542 admin 780 S wsccmd
543 admin 780 S wsccmd
544 admin 780 S wsccmd
545 admin 780 S wsccmd
635 admin 356 S dhcpd
896 admin 464 S nas -P /var/nas.lan0.pid -H 34954 -l br0 -i wl0 -A -m
910 admin 216 S bftpd
915 admin 780 S wsccmd
956 admin SWN [jffs2_gcd_mtd1]
957 admin 1936 S httpd
961 admin 496 S pppd -c 0.8.81.1 -r DUNpfrMW -i nas_0_8_81 -u ad54600
1174 admin 276 S /bin/dnsprobe
1178 admin 384 S upnp -L br0 -W ppp_0_8_81_1 -D
1190 admin 496 S siproxd --config /var/siproxd/siproxd.conf
1191 admin 496 S siproxd --config /var/siproxd/siproxd.conf
1192 admin 496 S siproxd --config /var/siproxd/siproxd.conf
1217 admin 2384 S tr69c
1225 admin 320 S /bin/igmp ppp_0_8_81_1
1830 admin 1744 S telnetd
1831 admin 1768 S telnetd
1832 admin 316 S sh -c ps
1833 admin 336 R ps
> sh
进入busyboxBusyBox v1.00 (2008.02.22-02:35+0000) Built-in shell (msh)
Enter 'help' for a list of built-in commands.
# cat /proc/cpuinfo
system type : 96358VW2
processor : 0
cpu model : BCM6358 V1.0
BogoMIPS : 299.00
wait instruction : no
microsecond timers : yes
tlb_entries : 32
extra interrupt vector : no
hardware watchpoint : no
unaligned access : 11
VCED exceptions : not available
VCEI exceptions : not available
# cat /proc/version
Linux version 2.6.8.1 (root@qinjian) (gcc version 3.4.2) #1 Thu Feb 21 21:29:49 EST 2008
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