2 * linux/arch/arm/boot/compressed/head-xscale.S
4 * XScale specific tweaks. This is merged into head.S by the linker.
8 #include <linux/config.h>
9 #include <linux/linkage.h>
10 #include <asm/mach-types.h>
12 .section ".start", "ax"
16 @ Preserve r8/r7 i.e. kernel entry values
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.
24 add r3, r2, #0x10000 @ 64 kb is quite enough...
28 mcr p15, 0, r0, c7, c10, 4 @ drain WB
29 mcr p15, 0, r0, c7, c7, 0 @ flush I & D caches
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
37 #ifdef CONFIG_ARCH_IQ80321
38 orr pc, pc, #PHYS_OFFSET @ jump to physical memory if we are not there.
40 mov r7, #MACH_TYPE_IQ80321
43 #ifdef CONFIG_ARCH_LUBBOCK
44 mov r7, #MACH_TYPE_LUBBOCK
47 #ifdef CONFIG_ARCH_COTULLA_IDP
48 mov r7, #MACH_TYPE_COTULLA_IDP
51 #ifdef CONFIG_ARCH_IQ80310
53 * Crank the CPU up to 733MHz
56 mcr p14, 0, r1, c6, c0, 0
59 * Disable ECC error notification
60 * At some point, we should add an ECC handler to Linux
66 mov r7, #MACH_TYPE_IQ80310