| Ley Foon Tan | 2fc8483 | 2014-11-06 15:20:19 +0800 | [diff] [blame] | 1 | menu "Platform options" |
| 2 | |
| 3 | comment "Memory settings" |
| 4 | |
| 5 | config NIOS2_MEM_BASE |
| 6 | hex "Memory base address" |
| 7 | default "0x00000000" |
| 8 | help |
| 9 | This is the physical address of the memory that the kernel will run |
| 10 | from. This address is used to link the kernel and setup initial memory |
| 11 | management. You should take the raw memory address without any MMU |
| 12 | or cache bits set. |
| 13 | Please not that this address is used directly so you have to manually |
| 14 | do address translation if it's connected to a bridge. |
| 15 | |
| 16 | comment "Device tree" |
| 17 | |
| 18 | config NIOS2_DTB_AT_PHYS_ADDR |
| 19 | bool "DTB at physical address" |
| 20 | default n |
| 21 | help |
| 22 | When enabled you can select a physical address to load the dtb from. |
| 23 | Normally this address is passed by a bootloader such as u-boot but |
| 24 | using this you can use a devicetree without a bootloader. |
| 25 | This way you can store a devicetree in NOR flash or an onchip rom. |
| 26 | Please note that this address is used directly so you have to manually |
| 27 | do address translation if it's connected to a bridge. Also take into |
| 28 | account that when using an MMU you'd have to ad 0xC0000000 to your |
| 29 | address |
| 30 | |
| 31 | config NIOS2_DTB_PHYS_ADDR |
| 32 | hex "DTB Address" |
| 33 | depends on NIOS2_DTB_AT_PHYS_ADDR |
| 34 | default "0xC0000000" |
| 35 | help |
| 36 | Physical address of a dtb blob. |
| 37 | |
| 38 | config NIOS2_DTB_SOURCE_BOOL |
| 39 | bool "Compile and link device tree into kernel image" |
| 40 | default n |
| 41 | help |
| 42 | This allows you to specify a dts (device tree source) file |
| 43 | which will be compiled and linked into the kernel image. |
| 44 | |
| 45 | config NIOS2_DTB_SOURCE |
| 46 | string "Device tree source file" |
| 47 | depends on NIOS2_DTB_SOURCE_BOOL |
| 48 | default "" |
| 49 | help |
| 50 | Absolute path to the device tree source (dts) file describing your |
| 51 | system. |
| 52 | |
| 53 | comment "Nios II instructions" |
| 54 | |
| 55 | config NIOS2_HW_MUL_SUPPORT |
| 56 | bool "Enable MUL instruction" |
| 57 | default n |
| 58 | help |
| 59 | Set to true if you configured the Nios II to include the MUL |
| 60 | instruction. This will enable the -mhw-mul compiler flag. |
| 61 | |
| 62 | config NIOS2_HW_MULX_SUPPORT |
| 63 | bool "Enable MULX instruction" |
| 64 | default n |
| 65 | help |
| 66 | Set to true if you configured the Nios II to include the MULX |
| 67 | instruction. Enables the -mhw-mulx compiler flag. |
| 68 | |
| 69 | config NIOS2_HW_DIV_SUPPORT |
| 70 | bool "Enable DIV instruction" |
| 71 | default n |
| 72 | help |
| 73 | Set to true if you configured the Nios II to include the DIV |
| 74 | instruction. Enables the -mhw-div compiler flag. |
| 75 | |
| 76 | config NIOS2_FPU_SUPPORT |
| 77 | bool "Custom floating point instr support" |
| 78 | default n |
| 79 | help |
| 80 | Enables the -mcustom-fpu-cfg=60-1 compiler flag. |
| 81 | |
| 82 | config NIOS2_CI_SWAB_SUPPORT |
| 83 | bool "Byteswap custom instruction" |
| 84 | default n |
| 85 | help |
| 86 | Use the byteswap (endian converter) Nios II custom instruction provided |
| 87 | by Altera and which can be enabled in QSYS builder. This accelerates |
| 88 | endian conversions in the kernel (e.g. ntohs). |
| 89 | |
| 90 | config NIOS2_CI_SWAB_NO |
| 91 | int "Byteswap custom instruction number" if NIOS2_CI_SWAB_SUPPORT |
| 92 | default 0 |
| 93 | help |
| 94 | Number of the instruction as configured in QSYS Builder. |
| 95 | |
| 96 | comment "Cache settings" |
| 97 | |
| 98 | config CUSTOM_CACHE_SETTINGS |
| 99 | bool "Custom cache settings" |
| 100 | help |
| 101 | This option allows you to tweak the cache settings used during early |
| 102 | boot (where the information from device tree is not yet available). |
| 103 | There should be no reason to change these values. Linux will work |
| 104 | perfectly fine, even if the Nios II is configured with smaller caches. |
| 105 | |
| 106 | Say N here unless you know what you are doing. |
| 107 | |
| 108 | config NIOS2_DCACHE_SIZE |
| 109 | hex "D-Cache size" if CUSTOM_CACHE_SETTINGS |
| 110 | range 0x200 0x10000 |
| 111 | default "0x800" |
| 112 | help |
| 113 | Maximum possible data cache size. |
| 114 | |
| 115 | config NIOS2_DCACHE_LINE_SIZE |
| 116 | hex "D-Cache line size" if CUSTOM_CACHE_SETTINGS |
| 117 | range 0x10 0x20 |
| 118 | default "0x20" |
| 119 | help |
| 120 | Minimum possible data cache line size. |
| 121 | |
| 122 | config NIOS2_ICACHE_SIZE |
| 123 | hex "I-Cache size" if CUSTOM_CACHE_SETTINGS |
| 124 | range 0x200 0x10000 |
| 125 | default "0x1000" |
| 126 | help |
| 127 | Maximum possible instruction cache size. |
| 128 | |
| 129 | endmenu |