[ARM] nommu: defines CPU_CP15, CPU_CP15_MMU and CPU_CP15_MPU

By merging of uClinux/ARM, we need to treat various CPU cores which have
MMU, MPU or even none for memory management. The memory management
coprocessors are controlled by CP15 register set and the ARM core family
can be categorized by 5 groups by the register ;
  G-a. CP15 is MMU : 610, 710, 720, 920, 922, 925, 926, 1020, 1020e, 1022,
		v6 and the derivations sa1100, sa110, xscale, xsc3.
  G-b. CP15 is MPU : 740, 940, 946, 996, 1156.
  G-c. CP15 is MPU or MMU : 1026 (selectable by schematic design)
  G-d. CP15 is exist, but nothing for memory managemnt : 966, 968.
  G-e. no-CP15 : 7tdmi, 9tdmi, 9e, 9ej

This patch defines CPU_CP15, CPU_CP15_MMU and CPU_CP15_MPU. Thus the
family can be defined as :
  - CPU_CP15 only : G-d
  - CPU_CP15_MMU(implies CPU_CP15) : G-a, G-c(selectable)
  - CPU_CP15_MPU(implies CPU_CP15) : G-b, G-c(selectable)
  - !CPU_CP15 : G-e
Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/Kconfig

@@ -15,6 +15,7 @@ config CPU_ARM610
 	select CPU_32v3
 	select CPU_CACHE_V3
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V3 if MMU
 	select CPU_TLB_V3 if MMU
 	help
@@ -31,6 +32,7 @@ config CPU_ARM710
 	select CPU_32v3
 	select CPU_CACHE_V3
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V3 if MMU
 	select CPU_TLB_V3 if MMU
 	help
@@ -50,6 +52,7 @@ config CPU_ARM720T
 	select CPU_ABRT_LV4T
 	select CPU_CACHE_V4
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WT if MMU
 	select CPU_TLB_V4WT if MMU
 	help
@@ -68,6 +71,7 @@ config CPU_ARM920T
 	select CPU_ABRT_EV4T
 	select CPU_CACHE_V4WT
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WB if MMU
 	select CPU_TLB_V4WBI if MMU
 	help
@@ -89,6 +93,7 @@ config CPU_ARM922T
 	select CPU_ABRT_EV4T
 	select CPU_CACHE_V4WT
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WB if MMU
 	select CPU_TLB_V4WBI if MMU
 	help
@@ -108,6 +113,7 @@ config CPU_ARM925T
 	select CPU_ABRT_EV4T
 	select CPU_CACHE_V4WT
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WB if MMU
 	select CPU_TLB_V4WBI if MMU
  	help
@@ -126,6 +132,7 @@ config CPU_ARM926T
 	select CPU_32v5
 	select CPU_ABRT_EV5TJ
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WB if MMU
 	select CPU_TLB_V4WBI if MMU
 	help
@@ -144,6 +151,7 @@ config CPU_ARM1020
 	select CPU_ABRT_EV4T
 	select CPU_CACHE_V4WT
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WB if MMU
 	select CPU_TLB_V4WBI if MMU
 	help
@@ -161,6 +169,7 @@ config CPU_ARM1020E
 	select CPU_ABRT_EV4T
 	select CPU_CACHE_V4WT
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WB if MMU
 	select CPU_TLB_V4WBI if MMU
 	depends on n
@@ -172,6 +181,7 @@ config CPU_ARM1022
 	select CPU_32v5
 	select CPU_ABRT_EV4T
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WB if MMU # can probably do better
 	select CPU_TLB_V4WBI if MMU
 	help
@@ -189,6 +199,7 @@ config CPU_ARM1026
 	select CPU_32v5
 	select CPU_ABRT_EV5T # But need Jazelle, but EV5TJ ignores bit 10
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WB if MMU # can probably do better
 	select CPU_TLB_V4WBI if MMU
 	help
@@ -207,6 +218,7 @@ config CPU_SA110
 	select CPU_ABRT_EV4
 	select CPU_CACHE_V4WB
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_COPY_V4WB if MMU
 	select CPU_TLB_V4WB if MMU
 	help
@@ -227,6 +239,7 @@ config CPU_SA1100
 	select CPU_ABRT_EV4
 	select CPU_CACHE_V4WB
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_TLB_V4WB if MMU
 
 # XScale
@@ -237,6 +250,7 @@ config CPU_XSCALE
 	select CPU_32v5
 	select CPU_ABRT_EV5T
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_TLB_V4WBI if MMU
 
 # XScale Core Version 3
@@ -247,6 +261,7 @@ config CPU_XSC3
 	select CPU_32v5
 	select CPU_ABRT_EV5T
 	select CPU_CACHE_VIVT
+	select CPU_CP15_MMU
 	select CPU_TLB_V4WBI if MMU
 	select IO_36
 
@@ -258,6 +273,7 @@ config CPU_V6
 	select CPU_ABRT_EV6
 	select CPU_CACHE_V6
 	select CPU_CACHE_VIPT
+	select CPU_CP15_MMU
 	select CPU_COPY_V6 if MMU
 	select CPU_TLB_V6 if MMU
 
@@ -380,6 +396,23 @@ config CPU_TLB_V6
 
 endif
 
+config CPU_CP15
+	bool
+	help
+	  Processor has the CP15 register.
+
+config CPU_CP15_MMU
+	bool
+	select CPU_CP15
+	help
+	  Processor has the CP15 register, which has MMU related registers.
+
+config CPU_CP15_MPU
+	bool
+	select CPU_CP15
+	help
+	  Processor has the CP15 register, which has MPU related registers.
+
 #
 # CPU supports 36-bit I/O
 #