xgdb scripts

Description

Useful xCORE debugger scripts

xlreg

The xlreg script defines a function that can be used to display the link state. Example usage:

# Run xgdb
$ xgdb
# Attach to device
(gdb) attach
# Source xlreg script
(gdb) source xlreg
# Call xlreg function to display link state
(gdb) xlreg
Thread 1 (tile[0] core[0]):
Tile 0 (Tap 0)
SSwitch
  Node id 0x0000
  PLL 0x1007700
  BootMode : 0x0013
  Dirs: 0000000000000000
  Link 0  not enabled
  Link 1  not enabled
  Link 2  not enabled
  Link 3  not enabled
  Link 4  not enabled
  Link 5  not enabled
  Link 6  not enabled
  Link 7  not enabled
  PLink 0 siu:F diu:F junk:F net:0 srctargetid:0 srctargettype:0
  PLink 1 siu:F diu:F junk:F net:0 srctargetid:0 srctargettype:0
  PLink 2 siu:F diu:F junk:F net:0 srctargetid:0 srctargettype:0
  PLink 3 siu:F diu:F junk:F net:0 srctargetid:0 srctargettype:0
PSwitch
  PLink 0 siu:F diu:F junk:F net:0 srctargetid:0 srctargettype:3
  PLink 1 siu:F diu:F junk:F net:0 srctargetid:0 srctargettype:3
  PLink 2 siu:F diu:F junk:F net:0 srctargetid:0 srctargettype:3
  PLink 3 siu:F diu:F junk:F net:0 srctargetid:0 srctargettype:3

Description

Notation

• 2w: 2 wire mode
• 5w: 5 wire mode
• x/x: inter-token delay/inter-symbol delay
• d:x: Direction
• snd: Link has credits and can transmit True/False
• rec: Link has issued credits and can receive True/False
• siu: Source in use
• diu: Destination in use

Related Documentation

The corresponding values are read from the "Interconnect Registers" They are described in XS1-L System Specification: http://www.xmos.com/en/published/xsysteml. The status register offsets can be inferred from the script. E.g. "sysreg read $tap 1 0x0" reads from register at offset 0x0 which is the "Device identification" register.

tilestate

The tilestate script defines functions that can be used to debug the state of xCORE hardware resources. Example usage:

# Run xgdb
$ xgdb
# Attach to device
(gdb) attach
# Source tilestate script
(gdb) source tilestate
# Display all resources on tile 0
(gdb) res_print_tile_resources 0
Tile 0:
--------
Timer 0:
    inUse=1, ieMode=E, $ieEnabled=0, ready=1, cond=NONE
    tWaiting=0, tNum=0
Core 0:
    inUse=1, msync=0, ssync=0, master=core 0
Lock 0:
    inUse=1, owned=0, owner=core 0
    Slaves=
Clock Block 0:
    inUse=1, started=1, stopping=0, fallDelay=0, riseDelay=0
    tWaiting=0, tNum=0
    clkSrc=0x00000001, rdySrc=0x00010000

The commands provided by this script are:

• res_print_port <TILE> <PORTWIDTH> <PORTNUM> - Print details of specified port
• res_print_ports <TILE> - Print details of all ports on specified tile
• res_print_timer <TILE> <TIMERNUM> - Print details of specified timer
• res_print_timers <TILE> - Print details of all timers on specified tile
• res_print_chanend <TILE> <CHANEND> - Print details of specified channel end
• res_print_chanends <TILE> - Print details of all channel ends on specified tile
• res_print_sync <TILE> <SYNCNUM> - Print details of specified synchronizer
• res_print_syncs <TILE> - Print details of all synchronizers on specified tile
• res_print_core <TILE> <CORENUM> - Print details of specified core
• res_print_cores <TILE> - Print details of all cores on specified tile
• res_print_lock <TILE> <LOCKNUM> - Print details of specified lock
• res_print_locks <TILE> - Print details of all locks on specified tile
• res_print_clkblk <TILE> <CLKBLKNUM> - Print details of specified clock block
• res_print_clkblks <TILE> - Print details of all clock blocks on specified tile
• res_print_divider <TILE> - Print details of specified divider
• res_print_tile_resources <TILE> - Print details of all resources on specified tile
• res_print_all - Print all resources on tiles 0 & 1

Note: by default only active resources will be displayed. In order to display all resources, then after sourcing the tilestate script do:: (gdb) set $res_print_not_inuse = 1

Note: it is possible to print extra detailed information by setting the following flag after sourcing the script:: (gdb) set $res_print_details = 1