litex/soc/cores/cpu/vexriscv_smp/boot-helper.S

   1 .section    .text, "ax", @progbits
   2 .global boot_helper
   3 .global smp_lottery_target
   4 .global smp_lottery_lock
   5 .global smp_lottery_args
   6 .global smp_slave
   7
   8 boot_helper:
   9         sw x10, smp_lottery_args  , x14
  10         sw x11, smp_lottery_args+4, x14
  11         sw x12, smp_lottery_args+8, x14
  12         sw x13, smp_lottery_target, x14
  13         fence w, w
  14         li x15, 1
  15         sw x15, smp_lottery_lock, x14
  16         jr x13
  17
  18 smp_slave:
  19         lw a0, smp_lottery_lock
  20         beqz a0, smp_slave
  21         fence r, r
  22
  23         .word(0x100F) //i$ flush
  24         lw x10, smp_lottery_args
  25         lw x11, smp_lottery_args+4
  26         lw x12, smp_lottery_args+8
  27         lw x13, smp_lottery_target
  28         jr x13
  29