ARM: initial multiplatform support

This lets us build a multiplatform kernel for experimental purposes.
However, it will not be useful for any real work, because it relies
on a number of useful things to be disabled for now:

* SMP support must be turned off because of conflicting symbols.
  Marc Zyngier has proposed a solution by adding a new SOC
  operations structure to hold indirect function pointers
  for these, but that work is currently stalled

* We turn on SPARSE_IRQ unconditionally, which is not supported
  on most platforms. Each of them is currently in a different
  state, but most are being worked on.

* A common clock framework is in place since v3.4 but not yet
  being used. Work on this is on its way.

* DEBUG_LL for early debugging is currently disabled.

* THUMB2_KERNEL does not work with allyesconfig because the
  kernel gets too big

[Rob Herring]: Rebased to not be dependent on the mass mach header rename.
As a result, omap2plus, imx, mxs and ux500 are not converted. Highbank,
picoxcell, mvebu, and socfpga are converted.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Cc: Dinh Nguyen <dinguyen@altera.com>

1 files changed, 57 insertions, 66 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4f5652d7bfa0..ebaf08849f96 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -254,26 +254,17 @@ config MMU
 #
 choice
 	prompt "ARM system type"
-	default ARCH_VERSATILE
+	default ARCH_MULTIPLATFORM
 
-config ARCH_SOCFPGA
-	bool "Altera SOCFPGA family"
-	select ARCH_WANT_OPTIONAL_GPIOLIB
-	select ARM_AMBA
-	select ARM_GIC
-	select CACHE_L2X0
-	select CLKDEV_LOOKUP
+config ARCH_MULTIPLATFORM
+	bool "Allow multiple platforms to be selected"
+	select ARM_PATCH_PHYS_VIRT
+	select AUTO_ZRELADDR
 	select COMMON_CLK
-	select CPU_V7
-	select DW_APB_TIMER
-	select DW_APB_TIMER_OF
-	select GENERIC_CLOCKEVENTS
-	select GPIO_PL061 if GPIOLIB
-	select HAVE_ARM_SCU
+	select MULTI_IRQ_HANDLER
 	select SPARSE_IRQ
 	select USE_OF
-	help
-	  This enables support for Altera SOCFPGA Cyclone V platform
+	depends on MMU
 
 config ARCH_INTEGRATOR
 	bool "ARM Ltd. Integrator family"
@@ -370,24 +361,6 @@ config ARCH_BCMRING
 	help
 	  Support for Broadcom's BCMRing platform.
 
-config ARCH_HIGHBANK
-	bool "Calxeda Highbank-based"
-	select ARCH_WANT_OPTIONAL_GPIOLIB
-	select ARM_AMBA
-	select ARM_GIC
-	select ARM_TIMER_SP804
-	select CACHE_L2X0
-	select CLKDEV_LOOKUP
-	select COMMON_CLK
-	select CPU_V7
-	select GENERIC_CLOCKEVENTS
-	select HAVE_ARM_SCU
-	select HAVE_SMP
-	select SPARSE_IRQ
-	select USE_OF
-	help
-	  Support for the Calxeda Highbank SoC based boards.
-
 config ARCH_CLPS711X
 	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
 	select CPU_ARM720T
@@ -568,18 +541,6 @@ config ARCH_IXP4XX
 	help
 	  Support for Intel's IXP4XX (XScale) family of processors.
 
-config ARCH_MVEBU
-	bool "Marvell SOCs with Device Tree support"
-	select GENERIC_CLOCKEVENTS
-	select MULTI_IRQ_HANDLER
-	select SPARSE_IRQ
-	select CLKSRC_MMIO
-	select GENERIC_IRQ_CHIP
-	select IRQ_DOMAIN
-	select COMMON_CLK
-	help
-	  Support for the Marvell SoC Family with device tree support
-
 config ARCH_DOVE
 	bool "Marvell Dove"
 	select CPU_V7
@@ -701,25 +662,6 @@ config ARCH_TEGRA
 	  This enables support for NVIDIA Tegra based systems (Tegra APX,
 	  Tegra 6xx and Tegra 2 series).
 
-config ARCH_PICOXCELL
-	bool "Picochip picoXcell"
-	select ARCH_REQUIRE_GPIOLIB
-	select ARM_PATCH_PHYS_VIRT
-	select ARM_VIC
-	select CPU_V6K
-	select DW_APB_TIMER
-	select DW_APB_TIMER_OF
-	select GENERIC_CLOCKEVENTS
-	select GENERIC_GPIO
-	select HAVE_TCM
-	select NO_IOPORT
-	select SPARSE_IRQ
-	select USE_OF
-	help
-	  This enables support for systems based on the Picochip picoXcell
-	  family of Femtocell devices.  The picoxcell support requires device tree
-	  for all boards.
-
 config ARCH_PNX4008
 	bool "Philips Nexperia PNX4008 Mobile"
 	select CPU_ARM926T
@@ -1043,6 +985,49 @@ config ARCH_ZYNQ
 	  Support for Xilinx Zynq ARM Cortex A9 Platform
 endchoice
 
+menu "Multiple platform selection"
+	depends on ARCH_MULTIPLATFORM
+
+comment "CPU Core family selection"
+
+config ARCH_MULTI_V4
+	bool "ARMv4 based platforms (FA526, StrongARM)"
+	select ARCH_MULTI_V4_V5
+	depends on !ARCH_MULTI_V6_V7
+
+config ARCH_MULTI_V4T
+	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
+	select ARCH_MULTI_V4_V5
+	depends on !ARCH_MULTI_V6_V7
+
+config ARCH_MULTI_V5
+	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
+	select ARCH_MULTI_V4_V5
+	depends on !ARCH_MULTI_V6_V7
+
+config ARCH_MULTI_V4_V5
+	bool
+
+config ARCH_MULTI_V6
+	bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
+	select CPU_V6
+	select ARCH_MULTI_V6_V7
+
+config ARCH_MULTI_V7
+	bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
+	select CPU_V7
+	default y
+	select ARCH_MULTI_V6_V7
+
+config ARCH_MULTI_V6_V7
+	bool
+
+config ARCH_MULTI_CPU_AUTO
+	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
+	select ARCH_MULTI_V5
+
+endmenu
+
 #
 # This is sorted alphabetically by mach-* pathname.  However, plat-*
 # Kconfigs may be included either alphabetically (according to the
@@ -1070,6 +1055,8 @@ source "arch/arm/mach-gemini/Kconfig"
 
 source "arch/arm/mach-h720x/Kconfig"
 
+source "arch/arm/mach-highbank/Kconfig"
+
 source "arch/arm/mach-integrator/Kconfig"
 
 source "arch/arm/mach-iop32x/Kconfig"
@@ -1105,6 +1092,8 @@ source "arch/arm/mach-omap2/Kconfig"
 
 source "arch/arm/mach-orion5x/Kconfig"
 
+source "arch/arm/mach-picoxcell/Kconfig"
+
 source "arch/arm/mach-pxa/Kconfig"
 source "arch/arm/plat-pxa/Kconfig"
 
@@ -1117,6 +1106,8 @@ source "arch/arm/mach-sa1100/Kconfig"
 source "arch/arm/plat-samsung/Kconfig"
 source "arch/arm/plat-s3c24xx/Kconfig"
 
+source "arch/arm/mach-socfpga/Kconfig"
+
 source "arch/arm/plat-spear/Kconfig"
 
 source "arch/arm/mach-s3c24xx/Kconfig"
@@ -2081,7 +2072,7 @@ endchoice
 
 config XIP_KERNEL
 	bool "Kernel Execute-In-Place from ROM"
-	depends on !ZBOOT_ROM && !ARM_LPAE
+	depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
 	help
 	  Execute-In-Place allows the kernel to run from non-volatile storage
 	  directly addressable by the CPU, such as NOR flash. This saves RAM