root/loader/ixus255_elph330hs/entry.S

   1 .section .entry
   3     LDR     SP, =MEMBASEADDR
   4     BL      check_compat
   7 // SD card off stuff does not seem to be needed
   9 // for testing, blink I/O LED 10 times at boot
  10 /*
  11         LDR     R3, =0xc0220158
  12         LDR     R4, =0xc022c020
  13         MOV             R1,#10
  14 2:
  15         MOV     R2, #0x46
  16         STR     R2, [R3]
  17         STR     R2, [R4]
  18         MOV     R0, #0x8000
  19 1:
  20         SUB R0,R0,#1
  21         CMP R0,#0
  22         BNE 1b
  23         MOV     R2, #0x44
  24         STR     R2, [R3]
  25         STR     R2, [R4]
  26         MOV     R0, #0x8000
  27 1:
  28         SUB R0,R0,#1
  29         CMP R0,#0
  30         BNE 1b
  31 
  32         SUB R1,R1,#1
  33         CMP R1,#0
  34         BNE 2b
  35 // ordinary startup...
  36 */
  37         MOV     SP, #0x1900   // Found @ 0xff00014c
  38         MOV     R11, #0
  39         B       my_restart