ARM: GIC: private a standard get_irqnr_preamble assembler macro

Provide a standard get_irqnr_preamble assembler macro for platforms
to use, which retrieves the base address of the GIC CPU interface
from gic_cpu_base_addr.  Allow platforms to override this by defining
HAVE_GET_IRQNR_PREAMBLE.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/hardware/entry-macro-gic.S

@@ -10,6 +10,13 @@
 
 #include <asm/hardware/gic.h>
 
+#ifndef HAVE_GET_IRQNR_PREAMBLE
+	.macro	get_irqnr_preamble, base, tmp
+	ldr	\base, =gic_cpu_base_addr
+	ldr	\base, [\base]
+	.endm
+#endif
+
 /*
  * The interrupt numbering scheme is defined in the
  * interrupt controller spec.  To wit:

arch/arm/mach-cns3xxx/include/mach/entry-macro.S

@@ -14,10 +14,5 @@
 		.macro	disable_fiq
 		.endm
 
-		.macro  get_irqnr_preamble, base, tmp
-		ldr	\base, =gic_cpu_base_addr
-		ldr	\base, [\base]
-		.endm
-
 		.macro  arch_ret_to_user, tmp1, tmp2
 		.endm

arch/arm/mach-omap2/include/mach/entry-macro.S

@@ -170,6 +170,7 @@ omap_irq_base:	.word	0
 
 
 #ifdef CONFIG_ARCH_OMAP4
+#define HAVE_GET_IRQNR_PREAMBLE
 #include <asm/hardware/entry-macro-gic.S>
 
 		.macro  get_irqnr_preamble, base, tmp

arch/arm/mach-realview/include/mach/entry-macro.S

@@ -13,11 +13,6 @@
 		.macro	disable_fiq
 		.endm
 
-		.macro  get_irqnr_preamble, base, tmp
-		ldr	\base, =gic_cpu_base_addr
-		ldr	\base, [\base]
-		.endm
-
 		.macro  arch_ret_to_user, tmp1, tmp2
 		.endm
 

arch/arm/mach-tegra/include/mach/entry-macro.S

@@ -16,7 +16,7 @@
 #include <mach/io.h>
 
 #if defined(CONFIG_ARM_GIC)
-
+#define HAVE_GET_IRQNR_PREAMBLE
 #include <asm/hardware/entry-macro-gic.S>
 
 	/* Uses the GIC interrupt controller built into the cpu */

arch/arm/mach-ux500/include/mach/entry-macro.S

@@ -11,6 +11,7 @@
  * warranty of any kind, whether express or implied.
  */
 #include <mach/hardware.h>
+#define HAVE_GET_IRQNR_PREAMBLE
 #include <asm/hardware/entry-macro-gic.S>
 
 		.macro	disable_fiq

arch/arm/mach-vexpress/include/mach/entry-macro.S

@@ -3,10 +3,5 @@
 	.macro	disable_fiq
 	.endm
 
-	.macro	get_irqnr_preamble, base, tmp
-	ldr	\base, =gic_cpu_base_addr
-	ldr	\base, [\base]
-	.endm
-
 	.macro	arch_ret_to_user, tmp1, tmp2
 	.endm