zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/vfp/entry.S b/ap/os/linux/linux-3.4.x/arch/arm/vfp/entry.S
new file mode 100644
index 0000000..50a724a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/vfp/entry.S
@@ -0,0 +1,72 @@
+/*
+ * linux/arch/arm/vfp/entry.S
+ *
+ * Copyright (C) 2004 ARM Limited.
+ * Written by Deep Blue Solutions Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <asm/thread_info.h>
+#include <asm/vfpmacros.h>
+#include "../kernel/entry-header.S"
+
+@ VFP entry point.
+@
+@ r0 = instruction opcode (32-bit ARM or two 16-bit Thumb)
+@ r2 = PC value to resume execution after successful emulation
+@ r9 = normal "successful" return address
+@ r10 = this threads thread_info structure
+@ lr = unrecognised instruction return address
+@ IRQs disabled.
+@
+ENTRY(do_vfp)
+#ifdef CONFIG_PREEMPT_COUNT
+ ldr r4, [r10, #TI_PREEMPT] @ get preempt count
+ add r11, r4, #1 @ increment it
+ str r11, [r10, #TI_PREEMPT]
+#endif
+ enable_irq
+ str r2, [sp, #S_PC] @ update regs->ARM_pc for Thumb 2 case
+ ldr r4, .LCvfp
+ ldr r11, [r10, #TI_CPU] @ CPU number
+ add r10, r10, #TI_VFPSTATE @ r10 = workspace
+ ldr pc, [r4] @ call VFP entry point
+ENDPROC(do_vfp)
+
+ENTRY(vfp_null_entry)
+#ifdef CONFIG_PREEMPT_COUNT
+ get_thread_info r10
+ ldr r4, [r10, #TI_PREEMPT] @ get preempt count
+ sub r11, r4, #1 @ decrement it
+ str r11, [r10, #TI_PREEMPT]
+#endif
+ mov pc, lr
+ENDPROC(vfp_null_entry)
+
+ .align 2
+.LCvfp:
+ .word vfp_vector
+
+@ This code is called if the VFP does not exist. It needs to flag the
+@ failure to the VFP initialisation code.
+
+ __INIT
+ENTRY(vfp_testing_entry)
+#ifdef CONFIG_PREEMPT_COUNT
+ get_thread_info r10
+ ldr r4, [r10, #TI_PREEMPT] @ get preempt count
+ sub r11, r4, #1 @ decrement it
+ str r11, [r10, #TI_PREEMPT]
+#endif
+ ldr r0, VFP_arch_address
+ str r5, [r0] @ known non-zero value
+ mov pc, r9 @ we have handled the fault
+ENDPROC(vfp_testing_entry)
+
+ .align 2
+VFP_arch_address:
+ .word VFP_arch
+
+ __FINIT