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... 251: 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 57