target/linux/generic-2.6/patches-2.6.30/021-mips_simple_prom_emulator.patch

   1 --- a/arch/mips/Kconfig
   2 +++ b/arch/mips/Kconfig
   3 @@ -805,6 +805,9 @@ config SYNC_R4K
   4
   5  config MIPS_MACHINE
   6         def_bool n
   7 +
   8 +config PROM_EMU
   9 +       def_bool n
  10
  11  config IMAGE_CMDLINE_HACK
  12         bool "OpenWrt specific image command line hack"
  13 --- a/arch/mips/kernel/head.S
  14 +++ b/arch/mips/kernel/head.S
  15 @@ -149,6 +149,15 @@ EXPORT(__image_cmdline)
  16         .fill   0x400
  17  #endif /* CONFIG_IMAGE_CMDLINE_HACK */
  18
  19 +#ifdef CONFIG_PROM_EMU
  20 +EXPORT(prom_emu_argv)
  21 +       .word   0
  22 +       .word   prom_emu_cmdline
  23 +       .ascii  "CMDLINE:"
  24 +EXPORT(prom_emu_cmdline)
  25 +       .fill   0x400
  26 +#endif
  27 +
  28         __REF
  29
  30  NESTED(kernel_entry, 16, sp)                   # kernel entry point
  31 @@ -189,6 +198,19 @@ NESTED(kernel_entry, 16, sp)                       # kernel
  32         LONG_S          zero, (t0)
  33         bne             t0, t1, 1b
  34
  35 +#ifdef CONFIG_PROM_EMU
  36 +       PTR_LA          t0, prom_emu_cmdline
  37 +       LONG_L          t1, 0(t0)
  38 +       beqz            t1, 1f
  39 +
  40 +       li              a0, 2
  41 +       PTR_LA          a1, prom_emu_argv
  42 +       move            a2, zero
  43 +       move            a3, zero
  44 +
  45 +1:
  46 +#endif /* CONFIG_PROM_EMU */
  47 +
  48         LONG_S          a0, fw_arg0             # firmware arguments
  49         LONG_S          a1, fw_arg1
  50         LONG_S          a2, fw_arg2