From 21b9b14b49b742c3ee70f819aab3918f517bf0b8 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Mon, 10 Nov 2014 18:00:24 -0700
Subject: [PATCH] x86: Add processor functions to halt and get stack pointer
Add a function to get the stack pointer and another to halt the CPU.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---
arch/x86/include/asm/processor.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index bb3172ff91a..b2854a978ab 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -30,4 +30,23 @@ enum {
#define X86_GDT_SIZE (X86_GDT_NUM_ENTRIES * X86_GDT_ENTRY_SIZE)
+#ifndef __ASSEMBLY__
+
+static inline __attribute__((always_inline)) void cpu_hlt(void)
+{
+ asm("hlt");
+}
+
+static inline ulong cpu_get_sp(void)
+{
+ ulong result;
+
+ asm volatile(
+ "mov %%esp, %%eax"
+ : "=a" (result));
+ return result;
+}
+
+#endif /* __ASSEMBLY__ */
+
#endif
--
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