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authorStefan Agner <stefan@agner.ch>2015-05-20 00:03:52 +0200
committerArnd Bergmann <arnd@arndb.de>2015-05-20 23:10:14 +0200
commit8064887e02fd684fa0576cbbcdbc29ceab125c4c (patch)
tree88f802d85811ff7e6c71832646de535e9bd5f954 /arch/arm/mach-imx
parent9c77bc438f88366e2e42c229b4aff52d4693e5c9 (diff)
ARM: vf610: enable Cortex-M4 configuration on Vybrid SoC
This patch allows to build the Kernel for Vybrid (VF6xx) SoC when ARMv7-M CPU is selected. The resulting image runs on the secondary Cortex-M4 core. This core has equally access to all peripherals as the main Cortex-A5 core. However, there is no resource control mechanism, hence when both cores are used simultaneously, orthogonal device tree's are required. The boot CPU is dependent on the SoC variant. The available boards use mostly variants where the Cortex-A5 is the primary and hence the boot CPU. Booting the secondary Cortex-M4 CPU needs SoC specific registers written. There is no in kernel support for this right now, a external userspace utility called "m4boot" can be used to boot the kernel: m4boot xipImage initramfs.cpio.lzo vf610m4-colibri.dtb Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-imx')
-rw-r--r--arch/arm/mach-imx/Kconfig38
-rw-r--r--arch/arm/mach-imx/Makefile.boot0
-rw-r--r--arch/arm/mach-imx/mach-vf610.c1
3 files changed, 22 insertions, 17 deletions
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 3a3d3e9d7bfd..2e3c45832674 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -1,5 +1,5 @@
menuconfig ARCH_MXC
- bool "Freescale i.MX family" if ARCH_MULTI_V4_V5 || ARCH_MULTI_V6_V7
+ bool "Freescale i.MX family" if ARCH_MULTI_V4_V5 || ARCH_MULTI_V6_V7 || ARM_SINGLE_ARMV7M
select ARCH_REQUIRE_GPIOLIB
select ARM_CPU_SUSPEND if PM
select CLKSRC_MMIO
@@ -496,10 +496,10 @@ config MACH_VPR200
endif
-if ARCH_MULTI_V5
-
comment "Device tree only"
+if ARCH_MULTI_V5
+
config SOC_IMX25
bool "i.MX25 support"
select ARCH_MXC_IOMUX_V3
@@ -512,7 +512,7 @@ endif
if ARCH_MULTI_V7
-comment "Device tree only"
+comment "Cortex-A platforms"
config SOC_IMX5
bool
@@ -582,10 +582,24 @@ config SOC_IMX6SX
help
This enables support for Freescale i.MX6 SoloX processor.
+config SOC_LS1021A
+ bool "Freescale LS1021A support"
+ select ARM_GIC
+ select HAVE_ARM_ARCH_TIMER
+ select PCI_DOMAINS if PCI
+ select ZONE_DMA if ARM_LPAE
+ help
+ This enables support for Freescale LS1021A processor.
+
+endif
+
+comment "Cortex-A/Cortex-M asymmetric multiprocessing platforms"
+
+if ARCH_MULTI_V7 || ARM_SINGLE_ARMV7M
+
config SOC_VF610
bool "Vybrid Family VF610 support"
- select IRQ_DOMAIN_HIERARCHY
- select ARM_GIC
+ select ARM_GIC if ARCH_MULTI_V7
select PINCTRL_VF610
select PL310_ERRATA_769419 if CACHE_L2X0
select SMP_ON_UP if SMP
@@ -599,7 +613,7 @@ choice
default VF_USE_ARM_GLOBAL_TIMER
config VF_USE_ARM_GLOBAL_TIMER
- bool "Use ARM Global Timer"
+ bool "Use ARM Global Timer" if ARCH_MULTI_V7
select ARM_GLOBAL_TIMER
select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK
help
@@ -613,16 +627,6 @@ choice
endchoice
-config SOC_LS1021A
- bool "Freescale LS1021A support"
- select ARM_GIC
- select HAVE_ARM_ARCH_TIMER
- select PCI_DOMAINS if PCI
- select ZONE_DMA if ARM_LPAE
-
- help
- This enables support for Freescale LS1021A processor.
-
endif
source "arch/arm/mach-imx/devices/Kconfig"
diff --git a/arch/arm/mach-imx/Makefile.boot b/arch/arm/mach-imx/Makefile.boot
new file mode 100644
index 000000000000..e69de29bb2d1
--- /dev/null
+++ b/arch/arm/mach-imx/Makefile.boot
diff --git a/arch/arm/mach-imx/mach-vf610.c b/arch/arm/mach-imx/mach-vf610.c
index 2e7c75b66fe0..b20f6c14eda5 100644
--- a/arch/arm/mach-imx/mach-vf610.c
+++ b/arch/arm/mach-imx/mach-vf610.c
@@ -17,6 +17,7 @@ static const char * const vf610_dt_compat[] __initconst = {
"fsl,vf510",
"fsl,vf600",
"fsl,vf610",
+ "fsl,vf610m4",
NULL,
};