1 files changed, 49 insertions, 0 deletions

diff --git a/arch/arm/boot/compressed/head-xscale.S b/arch/arm/boot/compressed/head-xscale.S
new file mode 100644
index 000000000000..665bd2c20743
--- /dev/null
+++ b/arch/arm/boot/compressed/head-xscale.S
@@ -0,0 +1,49 @@
+/*
+ * linux/arch/arm/boot/compressed/head-xscale.S
+ *
+ * XScale specific tweaks.  This is merged into head.S by the linker.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <asm/mach-types.h>
+
+                .section        ".start", "ax"
+
+__XScale_start:
+
+                @ Preserve r8/r7 i.e. kernel entry values
+
+                @ Data cache might be active.
+                @ Be sure to flush kernel binary out of the cache,
+                @ whatever state it is, before it is turned off.
+                @ This is done by fetching through currently executed
+                @ memory to be sure we hit the same cache.
+                bic     r2, pc, #0x1f
+                add     r3, r2, #0x10000        @ 64 kb is quite enough...
+1:              ldr     r0, [r2], #32
+                teq     r2, r3
+                bne     1b
+                mcr     p15, 0, r0, c7, c10, 4  @ drain WB
+                mcr     p15, 0, r0, c7, c7, 0   @ flush I & D caches
+
+                @ disabling MMU and caches
+                mrc     p15, 0, r0, c1, c0, 0   @ read control reg
+                bic     r0, r0, #0x05           @ clear DC, MMU
+                bic     r0, r0, #0x1000         @ clear Icache
+                mcr     p15, 0, r0, c1, c0, 0
+
+#ifdef CONFIG_ARCH_LUBBOCK
+                mov     r7, #MACH_TYPE_LUBBOCK
+#endif
+
+#ifdef CONFIG_ARCH_COTULLA_IDP
+                mov     r7, #MACH_TYPE_COTULLA_IDP
+#endif
+
+#ifdef  CONFIG_MACH_GTWX5715
+               mov     r7, #(MACH_TYPE_GTWX5715 & 0xff)
+               orr     r7, r7, #(MACH_TYPE_GTWX5715 & 0xff00)
+#endif
+