OMAP3 Move cache routine to cache.S

v7_flush_dcache_all, because it depends on omap ROM code is not
generic.  Rename the function to 'invalidate_dcache' and move it
to the omap cpu directory.

Collect the other omap cache routines l2_cache_enable and
l2_cache_disable with invalide_dcache into cache.S.  This
means removing the old cache.c file that contained l2_cache_enable
and l2_cache_disable.

The conversion from cache.c to cache.S was done most through
disassembling the uboot binary.  The only significant change was
to change the comparision for the return of get_cpu_rev from

   cmp	r0, #0
   beq	earlier_than_label

Which was lost information to

   cmp	r0, #CPU_3XX_ES20
   blt	earlier_than_label

The paths through the enable routine were verified by
adding an infinite loop and seeing the hang.  Then
removing the infinite loop and seeing it continue.

The disable routine is similar enough that it was not
tested with this method.

Run tested by cold booting from nand on beagle and zoom1.
Compile tested on MAKEALL arm.

Signed-off-by: Tom Rix <Tom.Rix@windriver.com>

2 files changed, 3 insertions, 1 deletions

diff --git a/include/asm-arm/arch-omap3/omap3.h b/include/asm-arm/arch-omap3/omap3.h
index 6459d992b..12815f694 100644
--- a/include/asm-arm/arch-omap3/omap3.h
+++ b/include/asm-arm/arch-omap3/omap3.h
@@ -168,6 +168,8 @@ struct gpio {
  *  ES1     = rev 0
  *
  *  ES2 onwards, the value maps to contents of IDCODE register [31:28].
+ *
+ * Note : CPU_3XX_ES20 is used in cache.S.  Please review before changing.
  */
 #define CPU_3XX_ES10		0
 #define CPU_3XX_ES20		1
diff --git a/include/asm-arm/arch-omap3/sys_proto.h b/include/asm-arm/arch-omap3/sys_proto.h
index 7361d0896..2246f801e 100644
--- a/include/asm-arm/arch-omap3/sys_proto.h
+++ b/include/asm-arm/arch-omap3/sys_proto.h
@@ -55,7 +55,7 @@ void secureworld_exit(void);
 void setup_auxcr(void);
 void try_unlock_memory(void);
 u32 get_boot_type(void);
-void v7_flush_dcache_all(u32);
+void invalidate_dcache(u32);
 void sr32(void *, u32, u32, u32);
 u32 wait_on_value(u32, u32, void *, u32);
 void sdelay(unsigned long);