openbcm

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gh_sdk53402.asm (2699B)

      1 ;
      2 ;
      3 ;
      4 ; This license is set out in https://raw.githubusercontent.com/Broadcom-Network-Switching-Software/OpenBCM/master/Legal/LICENSE file.
      5 ; 
      6 ; Copyright 2007-2019 Broadcom Inc. All rights reserved.
      7 ;
      8 ;
      9 ; This is the default program for Greyhound SKUs:
     10 ;       BCM534x2
     11 ;
     12 ; To start it, use the following commands from BCM:
     13 ;
     14 ;       led load gh_sdk53402.hex
     15 ;       led auto on
     16 ;       led start
     17 ;
     18 ; Assume 1 LED per port for Link. And 2 bits stream per LED.
     19 ;       Link-Down = Off (b'00)
     20 ;       Link-Up = On (b'01)
     21 ;
     22 ; Totally 8 ports/LEDs will be outputed.
     23 ;
     24 ; Link up/down info cannot be derived from LINKEN or LINKUP, as the LED
     25 ; processor does not always have access to link status.  This program
     26 ; assumes link status is kept current in bit 0 of RAM byte (0xA0 + portnum).
     27 ; Generally, a program running on the main CPU must update these
     28 ; locations on link change; see linkscan callback in
     29 ; $SDK/src/appl/diag/ledproc.c.
     30 ;
     31 
     32 ;
     33 ; Constants
     34 ;
     35 NUM_PORTS   equ 8
     36 MIN_PORT_0 equ 22
     37 MAX_PORT_0 equ 29
     38 
     39 ;
     40 ; LED process
     41 ;
     42 start:
     43     ld  a, MIN_PORT_0
     44 
     45 iter_sec0:
     46     cmp a, MAX_PORT_0+1
     47     jnc  end
     48 
     49     cmp a, MIN_PORT_0
     50     jz  iter_sec0_init
     51     jc  iter_sec0_init
     52     jmp iter_sec0_start
     53 iter_sec0_init:
     54     ld  a, MIN_PORT_0
     55     ld  b, MAX_PORT_0
     56     ld  (SEC_MAX), b
     57 iter_sec0_start:
     58     jmp iter_common
     59 
     60 iter_common:
     61     port    a
     62     ld  (PORT_NUM), a
     63 
     64     call    get_link
     65 
     66     ld  a, (PORT_NUM)
     67     inc a
     68     ld b, (SEC_MAX)
     69     inc b
     70     cmp a, b
     71     jz iter_sec0
     72     jmp iter_common
     73 
     74 end:
     75 	send    2*NUM_PORTS
     76 
     77 ;
     78 ; get_link
     79 ;
     80 ;  This routine finds the link status LED for a port.
     81 ;  Link info is in bit 0 of the byte read from PORTDATA[port]
     82 ;  Inputs: (PORT_NUM)
     83 ;  Outputs: Carry flag set if link is up, clear if link is down.
     84 ;  Destroys: a, b
     85 get_link:
     86     ld  b, PORTDATA
     87     add b, (PORT_NUM)
     88     ld  a, (b)
     89     tst a, 0
     90 
     91     jc led_green
     92     jmp led_black
     93 
     94 ;
     95 ; led_green
     96 ;
     97 ;  Outputs: Bits to the LED stream indicating ON
     98 ;
     99 led_green:
    100     push 0
    101     pack
    102     push 1
    103     pack
    104     ret
    105 
    106 ;
    107 ; led_black
    108 ;
    109 ;  Outputs: Bits to the LED stream indicating OFF
    110 ;
    111 led_black:
    112     push 0
    113     pack
    114     push 0
    115     pack
    116     ret
    117 
    118 ; Variables (SDK software initializes LED memory from 0xA0-0xff to 0)
    119 PORTDATA    equ 0xA0
    120 PORT_NUM    equ 0xE0
    121 SEC_MAX equ 0xE1
    122 
    123 ; Symbolic names for the bits of the port status fields
    124 RX      equ 0x0 ; received packet
    125 TX      equ 0x1 ; transmitted packet
    126 COLL    equ 0x2 ; collision indicator
    127 SPEED_C equ 0x3 ; 100 Mbps
    128 SPEED_M equ 0x4 ; 1000 Mbps
    129 DUPLEX  equ 0x5 ; half/full duplex
    130 FLOW    equ 0x6 ; flow control capable
    131 LINKUP  equ 0x7 ; link down/up status
    132 LINKEN  equ 0x8 ; link disabled/enabled status
    133 ZERO    equ 0xE ; always 0
    134 ONE     equ 0xF ; always 1