---

yaml --- r: 67384 b: refs/heads/master c: 3164ccc h: refs/heads/master v: v3
git-mirror · Sep 22, 2007 · db9353b · db9353b
1 parent 4ebce46
commit db9353b
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Showing 3 changed files with 17 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fb8299ed31d474248c2028ab8393462841cc9b0b
+refs/heads/master: 3164cccdc0e6e16eb9797586aaa8d1f759799c01
diff --git a/trunk/arch/powerpc/Makefile b/trunk/arch/powerpc/Makefile
@@ -92,6 +92,10 @@ else
 endif
 endif
 
+ifeq ($(CONFIG_TUNE_CELL),y)
+	CFLAGS += $(call cc-option,-mtune=cell)
+endif
+
 # No AltiVec instruction when building kernel
 CFLAGS += $(call cc-option,-mno-altivec)
 

diff --git a/trunk/arch/powerpc/platforms/Kconfig.cputype b/trunk/arch/powerpc/platforms/Kconfig.cputype
@@ -71,6 +71,18 @@ config POWER4
 	depends on PPC64
 	def_bool y
 
+config TUNE_CELL
+	bool "Optimize for Cell Broadband Engine"
+	depends on PPC64
+	help
+	  Cause the compiler to optimize for the PPE of the Cell Broadband
+	  Engine. This will make the code run considerably faster on Cell
+	  but somewhat slower on other machines. This option only changes
+	  the scheduling of instructions, not the selection of instructions
+	  itself, so the resulting kernel will keep running on all other
+	  machines. When building a kernel that is supposed to run only
+	  on Cell, you should also select the POWER4_ONLY option.
+
 config 6xx
 	bool