Merge master.kernel.org:/home/rmk/linux-2.6-serial
[linux-2.6] / arch / arm / boot / compressed / head-xscale.S
1 /*
2  * linux/arch/arm/boot/compressed/head-xscale.S
3  *
4  * XScale specific tweaks.  This is merged into head.S by the linker.
5  *
6  */
7
8 #include <linux/config.h>
9 #include <linux/linkage.h>
10 #include <asm/mach-types.h>
11
12                 .section        ".start", "ax"
13
14 __XScale_start:
15
16                 @ Preserve r8/r7 i.e. kernel entry values
17
18                 @ Data cache might be active.
19                 @ Be sure to flush kernel binary out of the cache,
20                 @ whatever state it is, before it is turned off.
21                 @ This is done by fetching through currently executed
22                 @ memory to be sure we hit the same cache.
23                 bic     r2, pc, #0x1f
24                 add     r3, r2, #0x10000        @ 64 kb is quite enough...
25 1:              ldr     r0, [r2], #32
26                 teq     r2, r3
27                 bne     1b
28                 mcr     p15, 0, r0, c7, c10, 4  @ drain WB
29                 mcr     p15, 0, r0, c7, c7, 0   @ flush I & D caches
30
31                 @ disabling MMU and caches
32                 mrc     p15, 0, r0, c1, c0, 0   @ read control reg
33                 bic     r0, r0, #0x05           @ clear DC, MMU
34                 bic     r0, r0, #0x1000         @ clear Icache
35                 mcr     p15, 0, r0, c1, c0, 0
36
37 #ifdef CONFIG_ARCH_LUBBOCK
38                 mov     r7, #MACH_TYPE_LUBBOCK
39 #endif
40
41 #ifdef CONFIG_ARCH_COTULLA_IDP
42                 mov     r7, #MACH_TYPE_COTULLA_IDP
43 #endif
44
45 #ifdef  CONFIG_MACH_GTWX5715
46                mov     r7, #(MACH_TYPE_GTWX5715 & 0xff)
47                orr     r7, r7, #(MACH_TYPE_GTWX5715 & 0xff00)
48 #endif
49
50 #ifdef CONFIG_ARCH_IXP2000
51                 mov     r1, #-1
52                 mov     r0, #0xd6000000
53                 str     r1, [r0, #0x14]
54                 str     r1, [r0, #0x18]
55 #endif
56