| Alexey Charkov | 21f47fb | 2010-12-23 13:11:21 +0100 | [diff] [blame] | 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: |