arch/arm/boot/compressed/head-vt8500.S

   1 /*
   2  * linux/arch/arm/boot/compressed/head-vt8500.S
   3  *
   4  * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
   5  *
   6  * VIA VT8500 specific tweaks. This is merged into head.S by the linker.
   7  *
   8  */
   9
  10 #include <linux/linkage.h>
  11 #include <asm/mach-types.h>
  12
  13                 .section        ".start", "ax"
  14
  15 __VT8500_start:
  16         @ Compare the SCC ID register against a list of known values
  17         ldr     r1, .SCCID
  18         ldr     r3, [r1]
  19
  20         @ VT8500 override
  21         ldr     r4, .VT8500SCC
  22         cmp     r3, r4
  23         ldreq   r7, .ID_BV07
  24         beq     .Lendvt8500
  25
  26         @ WM8505 override
  27         ldr     r4, .WM8505SCC
  28         cmp     r3, r4
  29         ldreq   r7, .ID_8505
  30         beq     .Lendvt8500
  31
  32         @ Otherwise, leave the bootloader's machine id untouched
  33
  34 .SCCID:
  35         .word   0xd8120000
  36 .VT8500SCC:
  37         .word   0x34000102
  38 .WM8505SCC:
  39         .word   0x34260103
  40
  41 .ID_BV07:
  42         .word   MACH_TYPE_BV07
  43 .ID_8505:
  44         .word   MACH_TYPE_WM8505_7IN_NETBOOK
  45
  46 .Lendvt8500: