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authorPaul Burton <paul.burton@imgtec.com>2016-10-05 18:18:20 +0100
committerRalf Baechle <ralf@linux-mips.org>2016-10-06 18:04:04 +0200
commiteed0eabd12ef061821cbfa20d903476e07645320 (patch)
treedabf064a54995ba234fba3bd03d19f5dd07058c4 /arch/mips/Kconfig
parentcf2a5e0bb4c66e8c43caf9f1be93a1bd7fd07b17 (diff)
downloadop-kernel-dev-eed0eabd12ef061821cbfa20d903476e07645320.zip
op-kernel-dev-eed0eabd12ef061821cbfa20d903476e07645320.tar.gz
MIPS: generic: Introduce generic DT-based board support
Introduce a "generic" platform, which aims to be board-agnostic by making use of device trees passed by the boot protocol defined in the MIPS UHI (Universal Hosting Interface) specification. Provision is made for supporting boards which use a legacy boot protocol that can't be changed, but adding support for such boards or any others is left to followon patches. Right now the built kernels expect to be loaded to 0x80100000, ie. in kseg0. This is fine for the vast majority of MIPS platforms, but nevertheless it would be good to remove this limitation in the future by mapping the kernel via the TLB such that it can be loaded anywhere & map itself appropriately. Configuration is handled by dynamically generating configs using scripts/kconfig/merge_config.sh, somewhat similar to the way powerpc makes use of it. This allows for variations upon the configuration, eg. differing architecture revisions or subsets of driver support for differing boards, to be handled without having a large number of defconfig files. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14353/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/Kconfig')
-rw-r--r--arch/mips/Kconfig52
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 2356439..82b45dc 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -73,6 +73,57 @@ choice
prompt "System type"
default SGI_IP22
+config MIPS_GENERIC
+ bool "Generic board-agnostic MIPS kernel"
+ select BOOT_RAW
+ select BUILTIN_DTB
+ select CEVT_R4K
+ select CLKSRC_MIPS_GIC
+ select COMMON_CLK
+ select CPU_MIPSR2_IRQ_VI
+ select CPU_MIPSR2_IRQ_EI
+ select CSRC_R4K
+ select DMA_PERDEV_COHERENT
+ select HW_HAS_PCI
+ select IRQ_MIPS_CPU
+ select LIBFDT
+ select MIPS_CPU_SCACHE
+ select MIPS_GIC
+ select MIPS_L1_CACHE_SHIFT_7
+ select NO_EXCEPT_FILL
+ select PCI_DRIVERS_GENERIC
+ select PINCTRL
+ select SMP_UP if SMP
+ select SYS_HAS_CPU_MIPS32_R1
+ select SYS_HAS_CPU_MIPS32_R2
+ select SYS_HAS_CPU_MIPS32_R6
+ select SYS_HAS_CPU_MIPS64_R1
+ select SYS_HAS_CPU_MIPS64_R2
+ select SYS_HAS_CPU_MIPS64_R6
+ select SYS_SUPPORTS_32BIT_KERNEL
+ select SYS_SUPPORTS_64BIT_KERNEL
+ select SYS_SUPPORTS_BIG_ENDIAN
+ select SYS_SUPPORTS_HIGHMEM
+ select SYS_SUPPORTS_LITTLE_ENDIAN
+ select SYS_SUPPORTS_MICROMIPS
+ select SYS_SUPPORTS_MIPS_CPS
+ select SYS_SUPPORTS_MIPS16
+ select SYS_SUPPORTS_MULTITHREADING
+ select SYS_SUPPORTS_RELOCATABLE
+ select SYS_SUPPORTS_SMARTMIPS
+ select USB_EHCI_BIG_ENDIAN_DESC if BIG_ENDIAN
+ select USB_EHCI_BIG_ENDIAN_MMIO if BIG_ENDIAN
+ select USB_OHCI_BIG_ENDIAN_DESC if BIG_ENDIAN
+ select USB_OHCI_BIG_ENDIAN_MMIO if BIG_ENDIAN
+ select USB_UHCI_BIG_ENDIAN_DESC if BIG_ENDIAN
+ select USB_UHCI_BIG_ENDIAN_MMIO if BIG_ENDIAN
+ select USE_OF
+ help
+ Select this to build a kernel which aims to support multiple boards,
+ generally using a flattened device tree passed from the bootloader
+ using the boot protocol defined in the UHI (Unified Hosting
+ Interface) specification.
+
config MIPS_ALCHEMY
bool "Alchemy processor based machines"
select ARCH_PHYS_ADDR_T_64BIT
@@ -989,6 +1040,7 @@ source "arch/mips/ath79/Kconfig"
source "arch/mips/bcm47xx/Kconfig"
source "arch/mips/bcm63xx/Kconfig"
source "arch/mips/bmips/Kconfig"
+source "arch/mips/generic/Kconfig"
source "arch/mips/jazz/Kconfig"
source "arch/mips/jz4740/Kconfig"
source "arch/mips/lantiq/Kconfig"
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