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It sports three processors combined into the SoC, a 500MHz MIPS 24KF main CPU+FPU, a 333MHz MIPS 4KEc IPU (Image Processing Unit) and a 333MHz Security CPU supporting conditional access (CA) and digital rights management (DRM). | It sports three processors combined into the SoC, a 500MHz MIPS 24KF main CPU+FPU, a 333MHz MIPS 4KEc IPU (Image Processing Unit) and a 333MHz Security CPU supporting conditional access (CA) and digital rights management (DRM). | ||
| − | < | + | <PRE> |
| − | ~ # cat /proc/cpuinfo | + | ~ # cat /proc/cpuinfo |
| − | system type : Sigma Designs TangoX | + | system type : Sigma Designs TangoX |
| − | processor : 0 | + | processor : 0 |
| − | cpu model : MIPS 24K V7.12 FPU V0.0 | + | cpu model : MIPS 24K V7.12 FPU V0.0 |
| − | Initial BogoMIPS : 332.59 | + | Initial BogoMIPS : 332.59 |
| − | wait instruction : yes | + | wait instruction : yes |
| − | microsecond timers : yes | + | microsecond timers : yes |
| − | tlb_entries : 32 | + | tlb_entries : 32 |
| − | extra interrupt vector : yes | + | extra interrupt vector : yes |
| − | hardware watchpoint : yes | + | hardware watchpoint : yes |
| − | ASEs implemented : mips16 | + | ASEs implemented : mips16 |
| − | shadow register sets : 1 | + | shadow register sets : 1 |
| − | VCED exceptions : not available | + | VCED exceptions : not available |
| − | VCEI exceptions : not available | + | VCEI exceptions : not available |
| − | + | ||
| − | System bus frequency : 333000000 Hz | + | System bus frequency : 333000000 Hz |
| − | CPU frequency : 499500000 Hz | + | CPU frequency : 499500000 Hz |
| − | DSP frequency : 333000000 Hz | + | DSP frequency : 333000000 Hz |
| − | </ | + | </PRE> |
| Line 31: | Line 31: | ||
The board contains a single Micron MT29F2G08AAD NAND FLASH with a capacity of 2Gbits x 8 (256MBytes). | The board contains a single Micron MT29F2G08AAD NAND FLASH with a capacity of 2Gbits x 8 (256MBytes). | ||
| − | < | + | <PRE> |
/proc # cat sigminfo | /proc # cat sigminfo | ||
dev: size offset name CS | dev: size offset name CS | ||
| − | sigmblk0: 0ff80000 00000000 "CS0-Device" 0 | + | sigmblk0: 0ff80000 00000000 "CS0-Device" 0 |
| − | sigmblk1: 00080000 00000000 "CS0-Part1" 0 | + | sigmblk1: 00080000 00000000 "CS0-Part1" 0 |
| − | sigmblk2: 00040000 00080000 "CS0-Part2" 0 | + | sigmblk2: 00040000 00080000 "CS0-Part2" 0 |
| − | sigmblk3: 00300000 000c0000 "CS0-Part3" 0 | + | sigmblk3: 00300000 000c0000 "CS0-Part3" 0 |
| − | sigmblk4: 00300000 003c0000 "CS0-Part4" 0 | + | sigmblk4: 00300000 003c0000 "CS0-Part4" 0 |
| − | sigmblk5: 01000000 006c0000 "CS0-Part5" 0 | + | sigmblk5: 01000000 006c0000 "CS0-Part5" 0 |
| − | sigmblk6: 00800000 016c0000 "CS0-Part6" 0 | + | sigmblk6: 00800000 016c0000 "CS0-Part6" 0 |
| − | sigmblk7: 05a00000 01ec0000 "CS0-Part7" 0 | + | sigmblk7: 05a00000 01ec0000 "CS0-Part7" 0 |
| − | sigmblk8: 05a00000 078c0000 "CS0-Part8" 0 | + | sigmblk8: 05a00000 078c0000 "CS0-Part8" 0 |
| − | sigmblk9: 00020000 0d2c0000 "CS0-Part9" 0 | + | sigmblk9: 00020000 0d2c0000 "CS0-Part9" 0 |
| − | sigmblk10: 00020000 0d2e0000 "CS0-Part10" 0 | + | sigmblk10: 00020000 0d2e0000 "CS0-Part10" 0 |
| − | sigmblk11: 00020000 0d300000 "CS0-Part11" 0 | + | sigmblk11: 00020000 0d300000 "CS0-Part11" 0 |
| − | </ | + | </PRE> |
| + | <PRE> | ||
/dev # ls -l /dev/mtd* | /dev # ls -l /dev/mtd* | ||
brw-r--r-- 1 root root 254, 0 Jan 1 2000 /dev/mtdblock0 | brw-r--r-- 1 root root 254, 0 Jan 1 2000 /dev/mtdblock0 | ||
| Line 69: | Line 70: | ||
brw-rw---- 1 root root 254, 10 Nov 12 12:51 /dev/sigmblockk | brw-rw---- 1 root root 254, 10 Nov 12 12:51 /dev/sigmblockk | ||
brw-rw---- 1 root root 254, 11 Jan 1 2000 /dev/sigmblockl | brw-rw---- 1 root root 254, 11 Jan 1 2000 /dev/sigmblockl | ||
| − | + | </PRE> | |
sigmblocka | sigmblocka | ||
| Line 92: | Line 93: | ||
To initialise the network and obtain an IP address via DHCP: | To initialise the network and obtain an IP address via DHCP: | ||
| − | < | + | <PRE> |
| − | YAMON> <B>net init</B | + | YAMON> <B>net init</B> |
| − | em86xx_eth0 ethernet stop | + | em86xx_eth0 ethernet stop |
| − | + | ||
| − | em86xx_eth0 - full-duplex mode | + | em86xx_eth0 - full-duplex mode |
| − | em86xx_eth0 - 100 Mbit/s | + | em86xx_eth0 - 100 Mbit/s |
| − | em86xx_eth0 ethernet start | + | em86xx_eth0 ethernet start |
| − | DHCP was successfully configured. | + | DHCP was successfully configured. |
| − | ipaddr: 192.168.0.50 | + | ipaddr: 192.168.0.50 |
| − | subnetmask: 255.255.255.0 | + | subnetmask: 255.255.255.0 |
| − | gateway: 192.168.0.254 | + | gateway: 192.168.0.254 |
| − | </ | + | </PRE> |
To load a kernel into memory from TFTP: | To load a kernel into memory from TFTP: | ||
| − | < | + | <PRE> |
YAMON> <B>load -b tftp://192.168.0.251/vmlinux.bin 0x84000000</B> | YAMON> <B>load -b tftp://192.168.0.251/vmlinux.bin 0x84000000</B> | ||
| − | </ | + | </PRE> |
And then execute: | And then execute: | ||
| − | < | + | <PRE> |
YAMON> <B>go</B> | YAMON> <B>go</B> | ||
| − | </ | + | </PRE> |
| Line 122: | Line 123: | ||
The YAMON bootloader requires a binary version of the kernel. Use objcopy to generate this file from the vmlinux ELF file. | The YAMON bootloader requires a binary version of the kernel. Use objcopy to generate this file from the vmlinux ELF file. | ||
| − | < | + | <PRE> |
mipsel-linux-objcopy -O binary vmlinux vmlinux.bin | mipsel-linux-objcopy -O binary vmlinux vmlinux.bin | ||
| − | </ | + | </PRE> |
| + | |||
| + | The default kernel configuration doesn't enable rootnfs. if you try to specify a NFS root, the kernel will display : | ||
| + | |||
| + | <PRE> | ||
| + | VFS: Cannot open root device "nfs" or unknown-block(0,255)<BR> | ||
| + | Please append a correct "root=" boot option; here are the available partitions: | ||
| + | Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,255)</PRE> | ||
| + | To turn this on, enable | ||
| + | Networking -> Networking Options -> IP: kernel level autoconfiguration | ||
| + | This will then allow you to enable : | ||
| + | File Systems -> Network File Systems -> Root file system on NFS | ||
== Root FS == | == Root FS == | ||
| Line 134: | Line 146: | ||
The filesystem is a CRAM ROM file system. To extract the contents : | The filesystem is a CRAM ROM file system. To extract the contents : | ||
| − | < | + | <PRE> |
tail -c +33 wdtvlive.bin > wdtvlive.stripped.bin | tail -c +33 wdtvlive.bin > wdtvlive.stripped.bin | ||
./cramfsck-16k -x dump wdtvlive.stripped.bin | ./cramfsck-16k -x dump wdtvlive.stripped.bin | ||
| − | </ | + | </PRE> |
Latest revision as of 11:27, 3 January 2012
The Western Digital TV Live is a media player running a Sigma Designs SMP8655 (Non Macrovision version of the SMP8654).
It sports three processors combined into the SoC, a 500MHz MIPS 24KF main CPU+FPU, a 333MHz MIPS 4KEc IPU (Image Processing Unit) and a 333MHz Security CPU supporting conditional access (CA) and digital rights management (DRM).
~ # cat /proc/cpuinfo system type : Sigma Designs TangoX processor : 0 cpu model : MIPS 24K V7.12 FPU V0.0 Initial BogoMIPS : 332.59 wait instruction : yes microsecond timers : yes tlb_entries : 32 extra interrupt vector : yes hardware watchpoint : yes ASEs implemented : mips16 shadow register sets : 1 VCED exceptions : not available VCEI exceptions : not available System bus frequency : 333000000 Hz CPU frequency : 499500000 Hz DSP frequency : 333000000 Hz
FLASH Memory
The board contains a single Micron MT29F2G08AAD NAND FLASH with a capacity of 2Gbits x 8 (256MBytes).
/proc # cat sigminfo dev: size offset name CS sigmblk0: 0ff80000 00000000 "CS0-Device" 0 sigmblk1: 00080000 00000000 "CS0-Part1" 0 sigmblk2: 00040000 00080000 "CS0-Part2" 0 sigmblk3: 00300000 000c0000 "CS0-Part3" 0 sigmblk4: 00300000 003c0000 "CS0-Part4" 0 sigmblk5: 01000000 006c0000 "CS0-Part5" 0 sigmblk6: 00800000 016c0000 "CS0-Part6" 0 sigmblk7: 05a00000 01ec0000 "CS0-Part7" 0 sigmblk8: 05a00000 078c0000 "CS0-Part8" 0 sigmblk9: 00020000 0d2c0000 "CS0-Part9" 0 sigmblk10: 00020000 0d2e0000 "CS0-Part10" 0 sigmblk11: 00020000 0d300000 "CS0-Part11" 0
/dev # ls -l /dev/mtd* brw-r--r-- 1 root root 254, 0 Jan 1 2000 /dev/mtdblock0 brw-r--r-- 1 root root 254, 3 Jan 1 2000 /dev/mtdblock2 brw-r--r-- 1 root root 254, 6 Jan 1 2000 /dev/mtdblock3 lrwxrwxrwx 1 root root 15 Jan 1 2000 /dev/mtdblock_bootloader -> /dev/sigmblocka lrwxrwxrwx 1 root root 15 Jan 1 2000 /dev/mtdblock_kernel -> /dev/sigmblockd lrwxrwxrwx 1 root root 15 Jan 1 2000 /dev/mtdblock_romfs -> /dev/sigmblockh ls -l /dev/sigmblock* brw-rw---- 1 root root 254, 0 Jan 1 2000 /dev/sigmblocka brw-rw---- 1 root root 254, 1 Jan 1 2000 /dev/sigmblockb brw-rw---- 1 root root 254, 2 Jan 1 2000 /dev/sigmblockc brw-rw---- 1 root root 254, 3 Jan 1 2000 /dev/sigmblockd brw-rw---- 1 root root 254, 4 Jan 1 2000 /dev/sigmblocke brw-rw---- 1 root root 254, 5 Jan 1 2000 /dev/sigmblockf brw-rw---- 1 root root 254, 6 Jan 1 2000 /dev/sigmblockg brw-rw---- 1 root root 254, 7 Jan 1 2000 /dev/sigmblockh brw-rw---- 1 root root 254, 8 Jan 1 2000 /dev/sigmblocki brw-rw---- 1 root root 254, 9 Jan 1 2000 /dev/sigmblockj brw-rw---- 1 root root 254, 10 Nov 12 12:51 /dev/sigmblockk brw-rw---- 1 root root 254, 11 Jan 1 2000 /dev/sigmblockl
sigmblocka signblockc YAMON sigmblockd vmlinux_xload.zbf sigmblocke vmlinux_xload.zbf sigmblockh
sigmblockf Splash Screens
RAM Memory
Four 1Gbit Nanya NT5TU64M16DG-AC DDR2-800 SDRAMs have been used for volatile memory providing a total 512Mbytes of RAM.
YAMON PROM Monitor
The board uses MIPS's YAMON PROM Monitor as the bootloader. Source code is available from here.
To break into the YAMON console while booting, press the 0 key.
To initialise the network and obtain an IP address via DHCP:
YAMON> <B>net init</B> em86xx_eth0 ethernet stop em86xx_eth0 - full-duplex mode em86xx_eth0 - 100 Mbit/s em86xx_eth0 ethernet start DHCP was successfully configured. ipaddr: 192.168.0.50 subnetmask: 255.255.255.0 gateway: 192.168.0.254
To load a kernel into memory from TFTP:
YAMON> <B>load -b tftp://192.168.0.251/vmlinux.bin 0x84000000</B>
And then execute:
YAMON> <B>go</B>
Kernel
The YAMON bootloader requires a binary version of the kernel. Use objcopy to generate this file from the vmlinux ELF file.
mipsel-linux-objcopy -O binary vmlinux vmlinux.bin
The default kernel configuration doesn't enable rootnfs. if you try to specify a NFS root, the kernel will display :
VFS: Cannot open root device "nfs" or unknown-block(0,255)<BR> Please append a correct "root=" boot option; here are the available partitions: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,255)
To turn this on, enable Networking -> Networking Options -> IP: kernel level autoconfiguration This will then allow you to enable : File Systems -> Network File Systems -> Root file system on NFS
Root FS
The WD Firmware distributes the firmware containing a filesystem image as a .bin file (e.g. wdtvlive.bin)
The filesystem is a CRAM ROM file system. To extract the contents :
tail -c +33 wdtvlive.bin > wdtvlive.stripped.bin ./cramfsck-16k -x dump wdtvlive.stripped.bin