Merge branch 'x86/urgent' into core/signal
[linux-2.6] / arch / arm / boot / compressed / head-sa1100.S
1 /* 
2  * linux/arch/arm/boot/compressed/head-sa1100.S
3  * 
4  * Copyright (C) 1999 Nicolas Pitre <nico@cam.org>
5  * 
6  * SA1100 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 __SA1100_start:
16
17                 @ Preserve r8/r7 i.e. kernel entry values
18 #ifdef CONFIG_SA1100_COLLIE
19                 mov     r7, #MACH_TYPE_COLLIE
20 #endif
21 #ifdef CONFIG_SA1100_SIMPAD
22                 @ UNTIL we've something like an open bootldr
23                 mov     r7, #MACH_TYPE_SIMPAD   @should be 87
24 #endif
25                 mrc     p15, 0, r0, c1, c0, 0   @ read control reg
26                 ands    r0, r0, #0x0d
27                 beq     99f
28
29                 @ Data cache might be active.
30                 @ Be sure to flush kernel binary out of the cache,
31                 @ whatever state it is, before it is turned off.
32                 @ This is done by fetching through currently executed
33                 @ memory to be sure we hit the same cache.
34                 bic     r2, pc, #0x1f
35                 add     r3, r2, #0x4000         @ 16 kb is quite enough...
36 1:              ldr     r0, [r2], #32
37                 teq     r2, r3
38                 bne     1b
39                 mcr     p15, 0, r0, c7, c10, 4  @ drain WB
40                 mcr     p15, 0, r0, c7, c7, 0   @ flush I & D caches
41
42                 @ disabling MMU and caches
43                 mrc     p15, 0, r0, c1, c0, 0   @ read control reg
44                 bic     r0, r0, #0x0d           @ clear WB, DC, MMU
45                 bic     r0, r0, #0x1000         @ clear Icache
46                 mcr     p15, 0, r0, c1, c0, 0
47 99: