1menu "Platform options"
2
3comment "Memory settings"
4
5config 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
16comment "Device tree"
17
18config 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
31config 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
38config 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
45config 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
53comment "Nios II instructions"
54
55config NIOS2_ARCH_REVISION
56	int "Select Nios II architecture revision"
57	range 1 2
58	default 1
59	help
60	  Select between Nios II R1 and Nios II R2 . The architectures
61	  are binary incompatible. Default is R1 .
62
63config NIOS2_HW_MUL_SUPPORT
64	bool "Enable MUL instruction"
65	default n
66	help
67	  Set to true if you configured the Nios II to include the MUL
68	  instruction.  This will enable the -mhw-mul compiler flag.
69
70config NIOS2_HW_MULX_SUPPORT
71	bool "Enable MULX instruction"
72	default n
73	help
74	  Set to true if you configured the Nios II to include the MULX
75	  instruction.  Enables the -mhw-mulx compiler flag.
76
77config NIOS2_HW_DIV_SUPPORT
78	bool "Enable DIV instruction"
79	default n
80	help
81	  Set to true if you configured the Nios II to include the DIV
82	  instruction.  Enables the -mhw-div compiler flag.
83
84config NIOS2_FPU_SUPPORT
85	bool "Custom floating point instr support"
86	default n
87	help
88	  Enables the -mcustom-fpu-cfg=60-1 compiler flag.
89
90config NIOS2_CI_SWAB_SUPPORT
91	bool "Byteswap custom instruction"
92	default n
93	help
94	  Use the byteswap (endian converter) Nios II custom instruction provided
95	  by Altera and which can be enabled in QSYS builder. This accelerates
96	  endian conversions in the kernel (e.g. ntohs).
97
98config NIOS2_CI_SWAB_NO
99	int "Byteswap custom instruction number" if NIOS2_CI_SWAB_SUPPORT
100	default 0
101	help
102	  Number of the instruction as configured in QSYS Builder.
103
104comment "Cache settings"
105
106config CUSTOM_CACHE_SETTINGS
107	bool "Custom cache settings"
108	help
109	  This option allows you to tweak the cache settings used during early
110	  boot (where the information from device tree is not yet available).
111	  There should be no reason to change these values. Linux will work
112	  perfectly fine, even if the Nios II is configured with smaller caches.
113
114	  Say N here unless you know what you are doing.
115
116config NIOS2_DCACHE_SIZE
117	hex "D-Cache size" if CUSTOM_CACHE_SETTINGS
118	range 0x200 0x10000
119	default "0x800"
120	help
121	  Maximum possible data cache size.
122
123config NIOS2_DCACHE_LINE_SIZE
124	hex "D-Cache line size" if CUSTOM_CACHE_SETTINGS
125	range 0x10 0x20
126	default "0x20"
127	help
128	  Minimum possible data cache line size.
129
130config NIOS2_ICACHE_SIZE
131	hex "I-Cache size" if CUSTOM_CACHE_SETTINGS
132	range 0x200 0x10000
133	default "0x1000"
134	help
135	  Maximum possible instruction cache size.
136
137endmenu
138