[PATCH 5/6] ARM: initial multiplatform support
Rob Herring
robherring2 at gmail.com
Wed Aug 29 18:49:59 EDT 2012
From: Rob Herring <rob.herring at calxeda.com>
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, socfpga, and vexpress are converted.
Signed-off-by: Arnd Bergmann <arnd at arndb.de>
Signed-off-by: Rob Herring <rob.herring at calxeda.com>
---
arch/arm/Kconfig.mach | 57 ++++++++++++++
arch/arm/Makefile | 155 ++++++++++++++++++++------------------
arch/arm/boot/compressed/misc.c | 6 ++
arch/arm/include/asm/timex.h | 4 +
arch/arm/mach-highbank/Kconfig | 2 +-
arch/arm/mach-mvebu/Kconfig | 2 +-
arch/arm/mach-mvebu/Makefile | 2 +
arch/arm/mach-picoxcell/Kconfig | 2 +-
arch/arm/mach-socfpga/Kconfig | 2 +-
arch/arm/mach-vexpress/Kconfig | 2 +-
arch/arm/mach-vexpress/Makefile | 2 +
arch/arm/plat-versatile/Makefile | 2 +
12 files changed, 158 insertions(+), 80 deletions(-)
diff --git a/arch/arm/Kconfig.mach b/arch/arm/Kconfig.mach
index 60f0386..7a21abb 100644
--- a/arch/arm/Kconfig.mach
+++ b/arch/arm/Kconfig.mach
@@ -4,6 +4,7 @@
#
choice
prompt "ARM system type"
+ depends on !ARCH_MULTIPLATFORM
default ARCH_VERSATILE
config ARCH_SOCFPGA_CHOICE
@@ -378,6 +379,62 @@ config ARCH_ZYNQ_CHOICE
Support for Xilinx Zynq ARM Cortex A9 Platform
endchoice
+menuconfig ARCH_MULTIPLATFORM
+ bool "Multiple platform selection"
+ select USE_OF
+ select COMMON_CLK
+ select SPARSE_IRQ
+ select MULTI_IRQ_HANDLER
+ select AUTO_ZRELADDR
+ depends on MMU
+
+if 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
+ select ARCH_VEXPRESS
+ 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
+
+endif
+
+if ARCH_MULTIPLATFORM
+comment "SoC family selection"
+endif
+
#
# This is sorted alphabetically by mach-* pathname. However, plat-*
# Kconfigs may be included either alphabetically (according to the
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 30eae87..fe6e05e 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -135,84 +135,84 @@ textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
# Machine directory name. This list is sorted alphanumerically
# by CONFIG_* macro name.
-machine-$(CONFIG_ARCH_AT91) := at91
-machine-$(CONFIG_ARCH_BCMRING) := bcmring
-machine-$(CONFIG_ARCH_CLPS711X) := clps711x
-machine-$(CONFIG_ARCH_CNS3XXX) := cns3xxx
-machine-$(CONFIG_ARCH_DAVINCI) := davinci
-machine-$(CONFIG_ARCH_DOVE) := dove
-machine-$(CONFIG_ARCH_EBSA110) := ebsa110
-machine-$(CONFIG_ARCH_EP93XX) := ep93xx
-machine-$(CONFIG_ARCH_GEMINI) := gemini
-machine-$(CONFIG_ARCH_H720X) := h720x
-machine-$(CONFIG_ARCH_HIGHBANK) := highbank
-machine-$(CONFIG_ARCH_INTEGRATOR) := integrator
-machine-$(CONFIG_ARCH_IOP13XX) := iop13xx
-machine-$(CONFIG_ARCH_IOP32X) := iop32x
-machine-$(CONFIG_ARCH_IOP33X) := iop33x
-machine-$(CONFIG_ARCH_IXP4XX) := ixp4xx
-machine-$(CONFIG_ARCH_KIRKWOOD) := kirkwood
-machine-$(CONFIG_ARCH_KS8695) := ks8695
-machine-$(CONFIG_ARCH_LPC32XX) := lpc32xx
-machine-$(CONFIG_ARCH_MMP) := mmp
-machine-$(CONFIG_ARCH_MSM) := msm
-machine-$(CONFIG_ARCH_MV78XX0) := mv78xx0
-machine-$(CONFIG_ARCH_IMX_V4_V5) := imx
-machine-$(CONFIG_ARCH_IMX_V6_V7) := imx
-machine-$(CONFIG_ARCH_MXS) := mxs
-machine-$(CONFIG_ARCH_MVEBU) := mvebu
-machine-$(CONFIG_ARCH_NETX) := netx
-machine-$(CONFIG_ARCH_NOMADIK) := nomadik
-machine-$(CONFIG_ARCH_OMAP1) := omap1
-machine-$(CONFIG_ARCH_OMAP2PLUS) := omap2
-machine-$(CONFIG_ARCH_ORION5X) := orion5x
-machine-$(CONFIG_ARCH_PICOXCELL) := picoxcell
-machine-$(CONFIG_ARCH_PNX4008) := pnx4008
-machine-$(CONFIG_ARCH_PRIMA2) := prima2
-machine-$(CONFIG_ARCH_PXA) := pxa
-machine-$(CONFIG_ARCH_REALVIEW) := realview
-machine-$(CONFIG_ARCH_RPC) := rpc
-machine-$(CONFIG_ARCH_S3C24XX) := s3c24xx s3c2412 s3c2440
-machine-$(CONFIG_ARCH_S3C64XX) := s3c64xx
-machine-$(CONFIG_ARCH_S5P64X0) := s5p64x0
-machine-$(CONFIG_ARCH_S5PC100) := s5pc100
-machine-$(CONFIG_ARCH_S5PV210) := s5pv210
-machine-$(CONFIG_ARCH_EXYNOS4) := exynos
-machine-$(CONFIG_ARCH_EXYNOS5) := exynos
-machine-$(CONFIG_ARCH_SA1100) := sa1100
-machine-$(CONFIG_ARCH_SHARK) := shark
-machine-$(CONFIG_ARCH_SHMOBILE) := shmobile
-machine-$(CONFIG_ARCH_TEGRA) := tegra
-machine-$(CONFIG_ARCH_U300) := u300
-machine-$(CONFIG_ARCH_U8500) := ux500
-machine-$(CONFIG_ARCH_VERSATILE) := versatile
-machine-$(CONFIG_ARCH_VEXPRESS) := vexpress
-machine-$(CONFIG_ARCH_VT8500) := vt8500
-machine-$(CONFIG_ARCH_W90X900) := w90x900
-machine-$(CONFIG_FOOTBRIDGE) := footbridge
-machine-$(CONFIG_ARCH_SOCFPGA) := socfpga
-machine-$(CONFIG_MACH_SPEAR1310) := spear13xx
-machine-$(CONFIG_MACH_SPEAR1340) := spear13xx
-machine-$(CONFIG_MACH_SPEAR300) := spear3xx
-machine-$(CONFIG_MACH_SPEAR310) := spear3xx
-machine-$(CONFIG_MACH_SPEAR320) := spear3xx
-machine-$(CONFIG_MACH_SPEAR600) := spear6xx
-machine-$(CONFIG_ARCH_ZYNQ) := zynq
+machine-$(CONFIG_ARCH_AT91) += at91
+machine-$(CONFIG_ARCH_BCMRING) += bcmring
+machine-$(CONFIG_ARCH_CLPS711X) += clps711x
+machine-$(CONFIG_ARCH_CNS3XXX) += cns3xxx
+machine-$(CONFIG_ARCH_DAVINCI) += davinci
+machine-$(CONFIG_ARCH_DOVE) += dove
+machine-$(CONFIG_ARCH_EBSA110) += ebsa110
+machine-$(CONFIG_ARCH_EP93XX) += ep93xx
+machine-$(CONFIG_ARCH_GEMINI) += gemini
+machine-$(CONFIG_ARCH_H720X) += h720x
+machine-$(CONFIG_ARCH_HIGHBANK) += highbank
+machine-$(CONFIG_ARCH_INTEGRATOR) += integrator
+machine-$(CONFIG_ARCH_IOP13XX) += iop13xx
+machine-$(CONFIG_ARCH_IOP32X) += iop32x
+machine-$(CONFIG_ARCH_IOP33X) += iop33x
+machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx
+machine-$(CONFIG_ARCH_KIRKWOOD) += kirkwood
+machine-$(CONFIG_ARCH_KS8695) += ks8695
+machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx
+machine-$(CONFIG_ARCH_MMP) += mmp
+machine-$(CONFIG_ARCH_MSM) += msm
+machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0
+machine-$(CONFIG_ARCH_IMX_V4_V5) += imx
+machine-$(CONFIG_ARCH_IMX_V6_V7) += imx
+machine-$(CONFIG_ARCH_MXS) += mxs
+machine-$(CONFIG_ARCH_MVEBU) += mvebu
+machine-$(CONFIG_ARCH_NETX) += netx
+machine-$(CONFIG_ARCH_NOMADIK) += nomadik
+machine-$(CONFIG_ARCH_OMAP1) += omap1
+machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2
+machine-$(CONFIG_ARCH_ORION5X) += orion5x
+machine-$(CONFIG_ARCH_PICOXCELL) += picoxcell
+machine-$(CONFIG_ARCH_PNX4008) += pnx4008
+machine-$(CONFIG_ARCH_PRIMA2) += prima2
+machine-$(CONFIG_ARCH_PXA) += pxa
+machine-$(CONFIG_ARCH_REALVIEW) += realview
+machine-$(CONFIG_ARCH_RPC) += rpc
+machine-$(CONFIG_ARCH_S3C24XX) += s3c24xx s3c2412 s3c2440
+machine-$(CONFIG_ARCH_S3C64XX) += s3c64xx
+machine-$(CONFIG_ARCH_S5P64X0) += s5p64x0
+machine-$(CONFIG_ARCH_S5PC100) += s5pc100
+machine-$(CONFIG_ARCH_S5PV210) += s5pv210
+machine-$(CONFIG_ARCH_EXYNOS4) += exynos
+machine-$(CONFIG_ARCH_EXYNOS5) += exynos
+machine-$(CONFIG_ARCH_SA1100) += sa1100
+machine-$(CONFIG_ARCH_SHARK) += shark
+machine-$(CONFIG_ARCH_SHMOBILE) += shmobile
+machine-$(CONFIG_ARCH_TEGRA) += tegra
+machine-$(CONFIG_ARCH_U300) += u300
+machine-$(CONFIG_ARCH_U8500) += ux500
+machine-$(CONFIG_ARCH_VERSATILE) += versatile
+machine-$(CONFIG_ARCH_VEXPRESS) += vexpress
+machine-$(CONFIG_ARCH_VT8500) += vt8500
+machine-$(CONFIG_ARCH_W90X900) += w90x900
+machine-$(CONFIG_FOOTBRIDGE) += footbridge
+machine-$(CONFIG_ARCH_SOCFPGA) += socfpga
+machine-$(CONFIG_MACH_SPEAR1310) += spear13xx
+machine-$(CONFIG_MACH_SPEAR1340) += spear13xx
+machine-$(CONFIG_MACH_SPEAR300) += spear3xx
+machine-$(CONFIG_MACH_SPEAR310) += spear3xx
+machine-$(CONFIG_MACH_SPEAR320) += spear3xx
+machine-$(CONFIG_MACH_SPEAR600) += spear6xx
+machine-$(CONFIG_ARCH_ZYNQ) += zynq
# Platform directory name. This list is sorted alphanumerically
# by CONFIG_* macro name.
-plat-$(CONFIG_ARCH_MXC) := mxc
-plat-$(CONFIG_ARCH_OMAP) := omap
-plat-$(CONFIG_ARCH_S3C64XX) := samsung
-plat-$(CONFIG_ARCH_ZYNQ) := versatile
-plat-$(CONFIG_PLAT_IOP) := iop
-plat-$(CONFIG_PLAT_NOMADIK) := nomadik
-plat-$(CONFIG_PLAT_ORION) := orion
-plat-$(CONFIG_PLAT_PXA) := pxa
-plat-$(CONFIG_PLAT_S3C24XX) := s3c24xx samsung
-plat-$(CONFIG_PLAT_S5P) := samsung
-plat-$(CONFIG_PLAT_SPEAR) := spear
-plat-$(CONFIG_PLAT_VERSATILE) := versatile
+plat-$(CONFIG_ARCH_MXC) += mxc
+plat-$(CONFIG_ARCH_OMAP) += omap
+plat-$(CONFIG_ARCH_S3C64XX) += samsung
+plat-$(CONFIG_ARCH_ZYNQ) += versatile
+plat-$(CONFIG_PLAT_IOP) += iop
+plat-$(CONFIG_PLAT_NOMADIK) += nomadik
+plat-$(CONFIG_PLAT_ORION) += orion
+plat-$(CONFIG_PLAT_PXA) += pxa
+plat-$(CONFIG_PLAT_S3C24XX) += s3c24xx samsung
+plat-$(CONFIG_PLAT_S5P) += samsung
+plat-$(CONFIG_PLAT_SPEAR) += spear
+plat-$(CONFIG_PLAT_VERSATILE) += versatile
ifeq ($(CONFIG_ARCH_EBSA110),y)
# This is what happens if you forget the IOCS16 line.
@@ -230,15 +230,20 @@ MACHINE := arch/arm/mach-$(word 1,$(machine-y))/
else
MACHINE :=
endif
+ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y)
+MACHINE :=
+endif
machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
platdirs := $(patsubst %,arch/arm/plat-%/,$(plat-y))
+ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y)
ifeq ($(KBUILD_SRC),)
KBUILD_CPPFLAGS += $(patsubst %,-I%include,$(machdirs) $(platdirs))
else
KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
endif
+endif
export TEXT_OFFSET GZFLAGS MMUEXT
diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c
index 8e2a8fc..df89983 100644
--- a/arch/arm/boot/compressed/misc.c
+++ b/arch/arm/boot/compressed/misc.c
@@ -25,7 +25,13 @@ unsigned int __machine_arch_type;
static void putstr(const char *ptr);
extern void error(char *x);
+#ifdef CONFIG_ARCH_MULTIPLATFORM
+static inline void putc(int c) {}
+static inline void flush(void) {}
+static inline void arch_decomp_setup(void) {}
+#else
#include <mach/uncompress.h>
+#endif
#ifdef CONFIG_DEBUG_ICEDCC
diff --git a/arch/arm/include/asm/timex.h b/arch/arm/include/asm/timex.h
index ce11944..963342a 100644
--- a/arch/arm/include/asm/timex.h
+++ b/arch/arm/include/asm/timex.h
@@ -13,7 +13,11 @@
#define _ASMARM_TIMEX_H
#include <asm/arch_timer.h>
+#ifdef CONFIG_ARCH_MULTIPLATFORM
+#define CLOCK_TICK_RATE 1000000
+#else
#include <mach/timex.h>
+#endif
typedef unsigned long cycles_t;
diff --git a/arch/arm/mach-highbank/Kconfig b/arch/arm/mach-highbank/Kconfig
index d4f1b23..0e1d0a4 100644
--- a/arch/arm/mach-highbank/Kconfig
+++ b/arch/arm/mach-highbank/Kconfig
@@ -1,5 +1,5 @@
config ARCH_HIGHBANK
- bool
+ bool "Calxeda ECX-1000 (Highbank)" if ARCH_MULTI_V7
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARM_AMBA
select ARM_GIC
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 1ed7d15..7b27035 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -1,5 +1,5 @@
config ARCH_MVEBU
- bool
+ bool "Marvell SOCs with Device Tree support" if ARCH_MULTI_V7
select CLKSRC_MMIO
select COMMON_CLK
select GENERIC_CLOCKEVENTS
diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
index e61d2b8..6ea8998 100644
--- a/arch/arm/mach-mvebu/Makefile
+++ b/arch/arm/mach-mvebu/Makefile
@@ -1,2 +1,4 @@
+ccflags-$(ARCH_MULTIPLATFORM) := -I$(srctree)/$(src)/include
+
obj-y += system-controller.o
obj-$(CONFIG_MACH_ARMADA_370_XP) += armada-370-xp.o irq-armada-370-xp.o
diff --git a/arch/arm/mach-picoxcell/Kconfig b/arch/arm/mach-picoxcell/Kconfig
index b0fd5a1..868796f 100644
--- a/arch/arm/mach-picoxcell/Kconfig
+++ b/arch/arm/mach-picoxcell/Kconfig
@@ -1,5 +1,5 @@
config ARCH_PICOXCELL
- bool
+ bool "Picochip PicoXcell" if ARCH_MULTI_V6
select ARCH_REQUIRE_GPIOLIB
select ARM_PATCH_PHYS_VIRT
select ARM_VIC
diff --git a/arch/arm/mach-socfpga/Kconfig b/arch/arm/mach-socfpga/Kconfig
index 51b04ba..803a328 100644
--- a/arch/arm/mach-socfpga/Kconfig
+++ b/arch/arm/mach-socfpga/Kconfig
@@ -1,5 +1,5 @@
config ARCH_SOCFPGA
- bool
+ bool "Altera SOCFPGA family" if ARCH_MULTI_V7
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARM_AMBA
select ARM_GIC
diff --git a/arch/arm/mach-vexpress/Kconfig b/arch/arm/mach-vexpress/Kconfig
index 8ce13a7..498ea15 100644
--- a/arch/arm/mach-vexpress/Kconfig
+++ b/arch/arm/mach-vexpress/Kconfig
@@ -1,5 +1,5 @@
config ARCH_VEXPRESS
- bool
+ bool "ARM Ltd. Versatile Express family" if ARCH_MULTI_V7
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARM_AMBA
select ARM_TIMER_SP804
diff --git a/arch/arm/mach-vexpress/Makefile b/arch/arm/mach-vexpress/Makefile
index 90551b9..42703e8 100644
--- a/arch/arm/mach-vexpress/Makefile
+++ b/arch/arm/mach-vexpress/Makefile
@@ -1,6 +1,8 @@
#
# Makefile for the linux kernel.
#
+ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/$(src)/include \
+ -I$(srctree)/arch/arm/plat-versatile/include
obj-y := v2m.o
obj-$(CONFIG_ARCH_VEXPRESS_CA9X4) += ct-ca9x4.o
diff --git a/arch/arm/plat-versatile/Makefile b/arch/arm/plat-versatile/Makefile
index 272769a8..74cfd94 100644
--- a/arch/arm/plat-versatile/Makefile
+++ b/arch/arm/plat-versatile/Makefile
@@ -1,3 +1,5 @@
+ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/$(src)/include
+
obj-$(CONFIG_PLAT_VERSATILE_CLOCK) += clock.o
obj-$(CONFIG_PLAT_VERSATILE_CLCD) += clcd.o
obj-$(CONFIG_PLAT_VERSATILE_FPGA_IRQ) += fpga-irq.o
--
1.7.9.5
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