1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
125 lines
4 KiB
Text
125 lines
4 KiB
Text
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FUJITSU FR-V LINUX KERNEL CONFIGURATION
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=======================================
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=====================
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CONFIGURATION OPTIONS
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=====================
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The most important setting is in the "MMU support options" tab (the first
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presented in the configuration tools available):
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(*) "Kernel Type"
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This options allows selection of normal, MMU-requiring linux, and uClinux
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(which doesn't require an MMU and doesn't have inter-process protection).
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There are a number of settings in the "Processor type and features" section of
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the kernel configuration that need to be considered.
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(*) "CPU"
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The register and instruction sets at the core of the processor. This can
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only be set to "FR40x/45x/55x" at the moment - but this permits usage of
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the kernel with MB93091 CB10, CB11, CB30, CB41, CB60, CB70 and CB451
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CPU boards, and with the MB93093 PDK board.
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(*) "System"
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This option allows a choice of basic system. This governs the peripherals
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that are expected to be available.
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(*) "Motherboard"
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This specifies the type of motherboard being used, and the peripherals
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upon it. Currently only "MB93090-MB00" can be set here.
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(*) "Default cache-write mode"
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This controls the initial data cache write management mode. By default
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Write-Through is selected, but Write-Back (Copy-Back) can also be
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selected. This can be changed dynamically once the kernel is running (see
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features.txt).
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There are some architecture specific configuration options in the "General
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Setup" section of the kernel configuration too:
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(*) "Reserve memory uncached for (PCI) DMA"
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This requests that a uClinux kernel set aside some memory in an uncached
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window for the use as consistent DMA memory (mainly for PCI). At least a
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megabyte will be allocated in this way, possibly more. Any memory so
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reserved will not be available for normal allocations.
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(*) "Kernel support for ELF-FDPIC binaries"
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This enables the binary-format driver for the new FDPIC ELF binaries that
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this platform normally uses. These binaries are totally relocatable -
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their separate sections can relocated independently, allowing them to be
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shared on uClinux where possible. This should normally be enabled.
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(*) "Kernel image protection"
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This makes the protection register governing access to the core kernel
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image prohibit access by userspace programs. This option is available on
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uClinux only.
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There are also a number of settings in the "Kernel Hacking" section of the
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kernel configuration especially for debugging a kernel on this
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architecture. See the "gdbstub.txt" file for information about those.
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======================
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DEFAULT CONFIGURATIONS
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======================
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The kernel sources include a number of example default configurations:
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(*) defconfig-mb93091
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Default configuration for the MB93091-VDK with both CPU board and
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MB93090-MB00 motherboard running uClinux.
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(*) defconfig-mb93091-fb
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Default configuration for the MB93091-VDK with CPU board,
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MB93090-MB00 motherboard, and DAV board running uClinux.
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Includes framebuffer driver.
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(*) defconfig-mb93093
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Default configuration for the MB93093-PDK board running uClinux.
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(*) defconfig-cb70-standalone
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Default configuration for the MB93091-VDK with only CB70 CPU board
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running uClinux. This will use the CB70's DM9000 for network access.
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(*) defconfig-mmu
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Default configuration for the MB93091-VDK with both CB451 CPU board and
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MB93090-MB00 motherboard running MMU linux.
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(*) defconfig-mmu-audio
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Default configuration for the MB93091-VDK with CB451 CPU board, DAV
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board, and MB93090-MB00 motherboard running MMU linux. Includes
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audio driver.
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(*) defconfig-mmu-fb
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Default configuration for the MB93091-VDK with CB451 CPU board, DAV
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board, and MB93090-MB00 motherboard running MMU linux. Includes
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framebuffer driver.
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(*) defconfig-mmu-standalone
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Default configuration for the MB93091-VDK with only CB451 CPU board
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running MMU linux.
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