| 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" |
| default n |
| 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 |
| default n |
| 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" |
| default n |
| 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" |
| default n |
| 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" |
| default n |
| 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 |
| default n |
| 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 |
| default n |
| 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" |
| default n |
| help |
| Enables the -mcustom-fpu-cfg=60-1 compiler flag. |
| |
| config NIOS2_CI_SWAB_SUPPORT |
| bool "Byteswap custom instruction" |
| default n |
| 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 |