gh_sdk53403_opt2.asm (3310B)
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 ; BCM53404 Opt2 11 ; 12 ; To start it, use the following commands from BCM: 13 ; 14 ; led load gh_cascade.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 11 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 11 36 MIN_PORT_0 equ 2 37 MAX_PORT_0 equ 2 38 MIN_PORT_1 equ 18 39 MAX_PORT_1 equ 24 40 MIN_PORT_2 equ 26 41 MAX_PORT_2 equ 28 42 43 ; 44 ; LED process 45 ; 46 start: 47 ld a, MIN_PORT_0 48 49 iter_sec0: 50 cmp a, MAX_PORT_0+1 51 jnc iter_sec1 52 53 cmp a, MIN_PORT_0 54 jz iter_sec0_init 55 jc iter_sec0_init 56 jmp iter_sec0_start 57 iter_sec0_init: 58 ld a, MIN_PORT_0 59 ld b, MAX_PORT_0 60 ld (SEC_MAX), b 61 iter_sec0_start: 62 jmp iter_common 63 64 iter_sec1: 65 cmp a, MAX_PORT_1+1 66 jnc iter_sec2 67 68 cmp a, MIN_PORT_1 69 jz iter_sec1_init 70 jc iter_sec1_init 71 jmp iter_sec1_start 72 iter_sec1_init: 73 ld a, MIN_PORT_1 74 ld b, MAX_PORT_1 75 ld (SEC_MAX), b 76 iter_sec1_start: 77 jmp iter_common 78 79 iter_sec2: 80 cmp a, MAX_PORT_2+1 81 jnc end 82 83 cmp a, MIN_PORT_2 84 jz iter_sec2_init 85 jc iter_sec2_init 86 jmp iter_sec2_start 87 iter_sec2_init: 88 ld a, MIN_PORT_2 89 ld b, MAX_PORT_2 90 ld (SEC_MAX), b 91 iter_sec2_start: 92 jmp iter_common 93 94 iter_common: 95 port a 96 ld (PORT_NUM), a 97 98 call get_link 99 100 ld a, (PORT_NUM) 101 inc a 102 ld b, (SEC_MAX) 103 inc b 104 cmp a, b 105 jz iter_sec0 106 jmp iter_common 107 108 end: 109 send 2*NUM_PORTS 110 111 ; 112 ; get_link 113 ; 114 ; This routine finds the link status LED for a port. 115 ; Link info is in bit 0 of the byte read from PORTDATA[port] 116 ; Inputs: (PORT_NUM) 117 ; Outputs: Carry flag set if link is up, clear if link is down. 118 ; Destroys: a, b 119 get_link: 120 ld b, PORTDATA 121 add b, (PORT_NUM) 122 ld a, (b) 123 tst a, 0 124 125 jc led_green 126 jmp led_black 127 128 ; 129 ; led_green 130 ; 131 ; Outputs: Bits to the LED stream indicating ON 132 ; 133 led_green: 134 push 0 135 pack 136 push 1 137 pack 138 ret 139 140 ; 141 ; led_black 142 ; 143 ; Outputs: Bits to the LED stream indicating OFF 144 ; 145 led_black: 146 push 0 147 pack 148 push 0 149 pack 150 ret 151 152 ; Variables (SDK software initializes LED memory from 0xA0-0xff to 0) 153 PORTDATA equ 0xA0 154 PORT_NUM equ 0xE0 155 SEC_MAX equ 0xE1 156 157 ; Symbolic names for the bits of the port status fields 158 RX equ 0x0 ; received packet 159 TX equ 0x1 ; transmitted packet 160 COLL equ 0x2 ; collision indicator 161 SPEED_C equ 0x3 ; 100 Mbps 162 SPEED_M equ 0x4 ; 1000 Mbps 163 DUPLEX equ 0x5 ; half/full duplex 164 FLOW equ 0x6 ; flow control capable 165 LINKUP equ 0x7 ; link down/up status 166 LINKEN equ 0x8 ; link disabled/enabled status 167 ZERO equ 0xE ; always 0 168 ONE equ 0xF ; always 1