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| -rw-r--r-- | arch/nios2/platform/Kconfig.platform | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/arch/nios2/platform/Kconfig.platform b/arch/nios2/platform/Kconfig.platform new file mode 100644 index 000000000..e849daff6 --- /dev/null +++ b/arch/nios2/platform/Kconfig.platform @@ -0,0 +1,148 @@ +# SPDX-License-Identifier: GPL-2.0-only +menu "Platform options" + +comment "Memory settings" + +config NIOS2_MEM_BASE + hex "Memory base address" + default "0x00000000" + help + This is the physical address of the memory that the kernel will run + from. This address is used to link the kernel and setup initial memory + management. You should take the raw memory address without any MMU + or cache bits set. + Please not that this address is used directly so you have to manually + do address translation if it's connected to a bridge. + +comment "Device tree" + +config NIOS2_DTB_AT_PHYS_ADDR + bool "DTB at physical address" + help + When enabled you can select a physical address to load the dtb from. + Normally this address is passed by a bootloader such as u-boot but + using this you can use a devicetree without a bootloader. + This way you can store a devicetree in NOR flash or an onchip rom. + Please note that this address is used directly so you have to manually + do address translation if it's connected to a bridge. Also take into + account that when using an MMU you'd have to ad 0xC0000000 to your + address + +config NIOS2_DTB_PHYS_ADDR + hex "DTB Address" + depends on NIOS2_DTB_AT_PHYS_ADDR + default "0xC0000000" + help + Physical address of a dtb blob. + +config NIOS2_DTB_SOURCE_BOOL + bool "Compile and link device tree into kernel image" + depends on !COMPILE_TEST + help + This allows you to specify a dts (device tree source) file + which will be compiled and linked into the kernel image. + +config NIOS2_DTB_SOURCE + string "Device tree source file" + depends on NIOS2_DTB_SOURCE_BOOL + default "" + help + Absolute path to the device tree source (dts) file describing your + system. + +comment "Nios II instructions" + +config NIOS2_ARCH_REVISION + int "Select Nios II architecture revision" + range 1 2 + default 1 + help + Select between Nios II R1 and Nios II R2 . The architectures + are binary incompatible. Default is R1 . + +config NIOS2_HW_MUL_SUPPORT + bool "Enable MUL instruction" + help + Set to true if you configured the Nios II to include the MUL + instruction. This will enable the -mhw-mul compiler flag. + +config NIOS2_HW_MULX_SUPPORT + bool "Enable MULX instruction" + help + Set to true if you configured the Nios II to include the MULX + instruction. Enables the -mhw-mulx compiler flag. + +config NIOS2_HW_DIV_SUPPORT + bool "Enable DIV instruction" + help + Set to true if you configured the Nios II to include the DIV + instruction. Enables the -mhw-div compiler flag. + +config NIOS2_BMX_SUPPORT + bool "Enable BMX instructions" + depends on NIOS2_ARCH_REVISION = 2 + help + Set to true if you configured the Nios II R2 to include + the BMX Bit Manipulation Extension instructions. Enables + the -mbmx compiler flag. + +config NIOS2_CDX_SUPPORT + bool "Enable CDX instructions" + depends on NIOS2_ARCH_REVISION = 2 + help + Set to true if you configured the Nios II R2 to include + the CDX Bit Manipulation Extension instructions. Enables + the -mcdx compiler flag. + +config NIOS2_FPU_SUPPORT + bool "Custom floating point instr support" + help + Enables the -mcustom-fpu-cfg=60-1 compiler flag. + +config NIOS2_CI_SWAB_SUPPORT + bool "Byteswap custom instruction" + help + Use the byteswap (endian converter) Nios II custom instruction provided + by Altera and which can be enabled in QSYS builder. This accelerates + endian conversions in the kernel (e.g. ntohs). + +config NIOS2_CI_SWAB_NO + int "Byteswap custom instruction number" if NIOS2_CI_SWAB_SUPPORT + default 0 + help + Number of the instruction as configured in QSYS Builder. + +comment "Cache settings" + +config CUSTOM_CACHE_SETTINGS + bool "Custom cache settings" + help + This option allows you to tweak the cache settings used during early + boot (where the information from device tree is not yet available). + There should be no reason to change these values. Linux will work + perfectly fine, even if the Nios II is configured with smaller caches. + + Say N here unless you know what you are doing. + +config NIOS2_DCACHE_SIZE + hex "D-Cache size" if CUSTOM_CACHE_SETTINGS + range 0x200 0x10000 + default "0x800" + help + Maximum possible data cache size. + +config NIOS2_DCACHE_LINE_SIZE + hex "D-Cache line size" if CUSTOM_CACHE_SETTINGS + range 0x10 0x20 + default "0x20" + help + Minimum possible data cache line size. + +config NIOS2_ICACHE_SIZE + hex "I-Cache size" if CUSTOM_CACHE_SETTINGS + range 0x200 0x10000 + default "0x1000" + help + Maximum possible instruction cache size. + +endmenu |