Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 2 | config XTENSA |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 3 | def_bool y |
Max Filippov | 4a7f50f | 2018-09-11 22:12:59 -0700 | [diff] [blame] | 4 | select ARCH_HAS_SG_CHAIN |
Christoph Hellwig | 3f2bbf4 | 2018-06-19 09:03:16 +0200 | [diff] [blame] | 5 | select ARCH_HAS_SYNC_DMA_FOR_CPU |
| 6 | select ARCH_HAS_SYNC_DMA_FOR_DEVICE |
Vladimir Murzin | 07c75d7 | 2017-06-28 10:16:57 +0100 | [diff] [blame] | 7 | select ARCH_NO_COHERENT_DMA_MMAP if !MMU |
Max Filippov | 8f371c7 | 2013-04-15 09:21:35 +0400 | [diff] [blame] | 8 | select ARCH_WANT_FRAME_POINTERS |
Max Filippov | e969161 | 2013-01-06 16:17:21 +0400 | [diff] [blame] | 9 | select ARCH_WANT_IPC_PARSE_VERSION |
Max Filippov | 25df819 | 2014-02-18 15:29:11 +0400 | [diff] [blame] | 10 | select BUILDTIME_EXTABLE_SORT |
Al Viro | 3e41f9b | 2012-10-26 23:41:40 -0400 | [diff] [blame] | 11 | select CLONE_BACKWARDS |
Max Filippov | bda8932 | 2014-01-29 06:20:46 +0400 | [diff] [blame] | 12 | select COMMON_CLK |
Christoph Hellwig | bc3ec75 | 2018-09-08 11:22:43 +0200 | [diff] [blame] | 13 | select DMA_DIRECT_OPS |
Max Filippov | 920f8a39 | 2014-06-16 08:20:17 +0400 | [diff] [blame] | 14 | select GENERIC_ATOMIC64 |
| 15 | select GENERIC_CLOCKEVENTS |
| 16 | select GENERIC_IRQ_SHOW |
| 17 | select GENERIC_PCI_IOMAP |
| 18 | select GENERIC_SCHED_CLOCK |
Max Filippov | 57358ba9 | 2017-12-17 14:43:15 -0800 | [diff] [blame] | 19 | select GENERIC_STRNCPY_FROM_USER if KASAN |
Max Filippov | c633544 | 2017-12-03 13:28:52 -0800 | [diff] [blame] | 20 | select HAVE_ARCH_KASAN if MMU |
Max Filippov | 0e46c11 | 2016-04-25 22:08:20 +0300 | [diff] [blame] | 21 | select HAVE_DEBUG_KMEMLEAK |
Max Filippov | 9d2ffe5 | 2016-04-25 22:08:52 +0300 | [diff] [blame] | 22 | select HAVE_DMA_CONTIGUOUS |
Jiri Slaby | 5f56a5d | 2016-05-20 17:00:16 -0700 | [diff] [blame] | 23 | select HAVE_EXIT_THREAD |
Max Filippov | 920f8a39 | 2014-06-16 08:20:17 +0400 | [diff] [blame] | 24 | select HAVE_FUNCTION_TRACER |
Max Filippov | d951ba2 | 2015-09-30 15:17:35 +0300 | [diff] [blame] | 25 | select HAVE_FUTEX_CMPXCHG if !MMU |
Max Filippov | c91e02b | 2016-01-24 10:32:10 +0300 | [diff] [blame] | 26 | select HAVE_HW_BREAKPOINT if PERF_EVENTS |
Max Filippov | 920f8a39 | 2014-06-16 08:20:17 +0400 | [diff] [blame] | 27 | select HAVE_IRQ_TIME_ACCOUNTING |
| 28 | select HAVE_OPROFILE |
| 29 | select HAVE_PERF_EVENTS |
Masahiro Yamada | d148eac | 2018-06-14 19:36:45 +0900 | [diff] [blame] | 30 | select HAVE_STACKPROTECTOR |
Max Filippov | 920f8a39 | 2014-06-16 08:20:17 +0400 | [diff] [blame] | 31 | select IRQ_DOMAIN |
| 32 | select MODULES_USE_ELF_RELA |
Max Filippov | db8165f | 2015-06-04 13:41:27 +0300 | [diff] [blame] | 33 | select PERF_USE_VMALLOC |
Max Filippov | 920f8a39 | 2014-06-16 08:20:17 +0400 | [diff] [blame] | 34 | select VIRT_TO_BUS |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 35 | help |
| 36 | Xtensa processors are 32-bit RISC machines designed by Tensilica |
| 37 | primarily for embedded systems. These processors are both |
| 38 | configurable and extensible. The Linux port to the Xtensa |
| 39 | architecture supports all processor configurations and extensions, |
| 40 | with reasonable minimum requirements. The Xtensa Linux project has |
Masanari Iida | 0ada449 | 2013-01-04 17:29:18 +0900 | [diff] [blame] | 41 | a home page at <http://www.linux-xtensa.org/>. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 42 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 43 | config RWSEM_XCHGADD_ALGORITHM |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 44 | def_bool y |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 45 | |
Akinobu Mita | d4337aa | 2006-03-26 01:39:43 -0800 | [diff] [blame] | 46 | config GENERIC_HWEIGHT |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 47 | def_bool y |
Akinobu Mita | d4337aa | 2006-03-26 01:39:43 -0800 | [diff] [blame] | 48 | |
David Howells | f0d1b0b | 2006-12-08 02:37:49 -0800 | [diff] [blame] | 49 | config ARCH_HAS_ILOG2_U32 |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 50 | def_bool n |
David Howells | f0d1b0b | 2006-12-08 02:37:49 -0800 | [diff] [blame] | 51 | |
| 52 | config ARCH_HAS_ILOG2_U64 |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 53 | def_bool n |
David Howells | f0d1b0b | 2006-12-08 02:37:49 -0800 | [diff] [blame] | 54 | |
Uwe Kleine-König | ce816fa | 2014-04-07 15:39:19 -0700 | [diff] [blame] | 55 | config NO_IOPORT_MAP |
Max Filippov | d046f77 | 2012-09-17 05:44:41 +0400 | [diff] [blame] | 56 | def_bool n |
Al Viro | 5ea8176 | 2007-02-11 15:41:31 +0000 | [diff] [blame] | 57 | |
H. Peter Anvin | bdc8078 | 2008-02-08 04:21:26 -0800 | [diff] [blame] | 58 | config HZ |
| 59 | int |
| 60 | default 100 |
| 61 | |
Max Filippov | 8f371c7 | 2013-04-15 09:21:35 +0400 | [diff] [blame] | 62 | config LOCKDEP_SUPPORT |
| 63 | def_bool y |
| 64 | |
Max Filippov | 3e4196a | 2013-04-15 09:20:48 +0400 | [diff] [blame] | 65 | config STACKTRACE_SUPPORT |
| 66 | def_bool y |
| 67 | |
Max Filippov | c92931b | 2013-03-31 06:32:42 +0400 | [diff] [blame] | 68 | config TRACE_IRQFLAGS_SUPPORT |
| 69 | def_bool y |
| 70 | |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 71 | config MMU |
Max Filippov | de7c1c7 | 2015-06-27 07:31:12 +0300 | [diff] [blame] | 72 | def_bool n |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 73 | |
Baruch Siach | a1a2bde | 2013-12-18 09:10:29 +0200 | [diff] [blame] | 74 | config HAVE_XTENSA_GPIO32 |
| 75 | def_bool n |
| 76 | |
Max Filippov | c633544 | 2017-12-03 13:28:52 -0800 | [diff] [blame] | 77 | config KASAN_SHADOW_OFFSET |
| 78 | hex |
| 79 | default 0x6e400000 |
| 80 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 81 | menu "Processor type and features" |
| 82 | |
| 83 | choice |
| 84 | prompt "Xtensa Processor Configuration" |
Chris Zankel | 173d668 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 85 | default XTENSA_VARIANT_FSF |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 86 | |
Chris Zankel | 173d668 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 87 | config XTENSA_VARIANT_FSF |
Chris Zankel | 0025427 | 2008-10-21 09:11:43 -0700 | [diff] [blame] | 88 | bool "fsf - default (not generic) configuration" |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 89 | select MMU |
Chris Zankel | 0025427 | 2008-10-21 09:11:43 -0700 | [diff] [blame] | 90 | |
| 91 | config XTENSA_VARIANT_DC232B |
| 92 | bool "dc232b - Diamond 232L Standard Core Rev.B (LE)" |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 93 | select MMU |
Baruch Siach | a1a2bde | 2013-12-18 09:10:29 +0200 | [diff] [blame] | 94 | select HAVE_XTENSA_GPIO32 |
Chris Zankel | 0025427 | 2008-10-21 09:11:43 -0700 | [diff] [blame] | 95 | help |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 96 | This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE). |
Johannes Weiner | 000af2c | 2009-03-04 16:21:32 +0100 | [diff] [blame] | 97 | |
Pete Delaney | d0b73b4 | 2013-01-05 04:57:16 +0400 | [diff] [blame] | 98 | config XTENSA_VARIANT_DC233C |
| 99 | bool "dc233c - Diamond 233L Standard Core Rev.C (LE)" |
| 100 | select MMU |
Baruch Siach | a1a2bde | 2013-12-18 09:10:29 +0200 | [diff] [blame] | 101 | select HAVE_XTENSA_GPIO32 |
Pete Delaney | d0b73b4 | 2013-01-05 04:57:16 +0400 | [diff] [blame] | 102 | help |
| 103 | This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE). |
| 104 | |
Max Filippov | 420ae95 | 2014-06-16 07:25:06 +0400 | [diff] [blame] | 105 | config XTENSA_VARIANT_CUSTOM |
| 106 | bool "Custom Xtensa processor configuration" |
Max Filippov | 420ae95 | 2014-06-16 07:25:06 +0400 | [diff] [blame] | 107 | select HAVE_XTENSA_GPIO32 |
| 108 | help |
| 109 | Select this variant to use a custom Xtensa processor configuration. |
| 110 | You will be prompted for a processor variant CORENAME. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 111 | endchoice |
| 112 | |
Max Filippov | 420ae95 | 2014-06-16 07:25:06 +0400 | [diff] [blame] | 113 | config XTENSA_VARIANT_CUSTOM_NAME |
| 114 | string "Xtensa Processor Custom Core Variant Name" |
| 115 | depends on XTENSA_VARIANT_CUSTOM |
| 116 | help |
| 117 | Provide the name of a custom Xtensa processor variant. |
| 118 | This CORENAME selects arch/xtensa/variant/CORENAME. |
| 119 | Dont forget you have to select MMU if you have one. |
| 120 | |
| 121 | config XTENSA_VARIANT_NAME |
| 122 | string |
| 123 | default "dc232b" if XTENSA_VARIANT_DC232B |
| 124 | default "dc233c" if XTENSA_VARIANT_DC233C |
| 125 | default "fsf" if XTENSA_VARIANT_FSF |
Max Filippov | 420ae95 | 2014-06-16 07:25:06 +0400 | [diff] [blame] | 126 | default XTENSA_VARIANT_CUSTOM_NAME if XTENSA_VARIANT_CUSTOM |
| 127 | |
| 128 | config XTENSA_VARIANT_MMU |
| 129 | bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)" |
| 130 | depends on XTENSA_VARIANT_CUSTOM |
| 131 | default y |
Max Filippov | de7c1c7 | 2015-06-27 07:31:12 +0300 | [diff] [blame] | 132 | select MMU |
Max Filippov | 420ae95 | 2014-06-16 07:25:06 +0400 | [diff] [blame] | 133 | help |
| 134 | Build a Conventional Kernel with full MMU support, |
| 135 | ie: it supports a TLB with auto-loading, page protection. |
| 136 | |
Max Filippov | 9bd46da | 2015-06-14 01:41:25 +0300 | [diff] [blame] | 137 | config XTENSA_VARIANT_HAVE_PERF_EVENTS |
| 138 | bool "Core variant has Performance Monitor Module" |
| 139 | depends on XTENSA_VARIANT_CUSTOM |
| 140 | default n |
| 141 | help |
| 142 | Enable if core variant has Performance Monitor Module with |
| 143 | External Registers Interface. |
| 144 | |
| 145 | If unsure, say N. |
| 146 | |
Max Filippov | e462919 | 2015-11-27 16:26:41 +0300 | [diff] [blame] | 147 | config XTENSA_FAKE_NMI |
| 148 | bool "Treat PMM IRQ as NMI" |
| 149 | depends on XTENSA_VARIANT_HAVE_PERF_EVENTS |
| 150 | default n |
| 151 | help |
| 152 | If PMM IRQ is the only IRQ at EXCM level it is safe to |
| 153 | treat it as NMI, which improves accuracy of profiling. |
| 154 | |
| 155 | If there are other interrupts at or above PMM IRQ priority level |
| 156 | but not above the EXCM level, PMM IRQ still may be treated as NMI, |
| 157 | but only if these IRQs are not used. There will be a build warning |
| 158 | saying that this is not safe, and a bugcheck if one of these IRQs |
| 159 | actually fire. |
| 160 | |
| 161 | If unsure, say N. |
| 162 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 163 | config XTENSA_UNALIGNED_USER |
| 164 | bool "Unaligned memory access in use space" |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 165 | help |
| 166 | The Xtensa architecture currently does not handle unaligned |
| 167 | memory accesses in hardware but through an exception handler. |
| 168 | Per default, unaligned memory accesses are disabled in user space. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 169 | |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 170 | Say Y here to enable unaligned memory access in user space. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 171 | |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 172 | config HAVE_SMP |
| 173 | bool "System Supports SMP (MX)" |
Max Filippov | de7c1c7 | 2015-06-27 07:31:12 +0300 | [diff] [blame] | 174 | depends on XTENSA_VARIANT_CUSTOM |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 175 | select XTENSA_MX |
| 176 | help |
| 177 | This option is use to indicate that the system-on-a-chip (SOC) |
| 178 | supports Multiprocessing. Multiprocessor support implemented above |
| 179 | the CPU core definition and currently needs to be selected manually. |
| 180 | |
| 181 | Multiprocessor support in implemented with external cache and |
Masanari Iida | 769a12a | 2015-04-27 22:52:07 +0900 | [diff] [blame] | 182 | interrupt controllers. |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 183 | |
| 184 | The MX interrupt distributer adds Interprocessor Interrupts |
| 185 | and causes the IRQ numbers to be increased by 4 for devices |
| 186 | like the open cores ethernet driver and the serial interface. |
| 187 | |
| 188 | You still have to select "Enable SMP" to enable SMP on this SOC. |
| 189 | |
| 190 | config SMP |
| 191 | bool "Enable Symmetric multi-processing support" |
| 192 | depends on HAVE_SMP |
Max Filippov | f615136 | 2013-10-17 02:42:26 +0400 | [diff] [blame] | 193 | select GENERIC_SMP_IDLE_THREAD |
| 194 | help |
| 195 | Enabled SMP Software; allows more than one CPU/CORE |
| 196 | to be activated during startup. |
| 197 | |
| 198 | config NR_CPUS |
| 199 | depends on SMP |
| 200 | int "Maximum number of CPUs (2-32)" |
| 201 | range 2 32 |
| 202 | default "4" |
| 203 | |
Max Filippov | 49b424f | 2013-10-17 02:42:28 +0400 | [diff] [blame] | 204 | config HOTPLUG_CPU |
| 205 | bool "Enable CPU hotplug support" |
| 206 | depends on SMP |
| 207 | help |
| 208 | Say Y here to allow turning CPUs off and on. CPUs can be |
| 209 | controlled through /sys/devices/system/cpu. |
| 210 | |
| 211 | Say N if you want to disable CPU hotplug. |
| 212 | |
Max Filippov | e85e335 | 2012-12-03 15:01:43 +0400 | [diff] [blame] | 213 | config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX |
| 214 | bool "Initialize Xtensa MMU inside the Linux kernel code" |
Max Filippov | a4c6be5 | 2016-09-29 10:51:05 -0700 | [diff] [blame] | 215 | depends on !XTENSA_VARIANT_FSF && !XTENSA_VARIANT_DC232B |
Max Filippov | 73a3eed | 2016-08-04 15:45:32 +0300 | [diff] [blame] | 216 | default y if XTENSA_VARIANT_DC233C || XTENSA_VARIANT_CUSTOM |
Max Filippov | e85e335 | 2012-12-03 15:01:43 +0400 | [diff] [blame] | 217 | help |
| 218 | Earlier version initialized the MMU in the exception vector |
| 219 | before jumping to _startup in head.S and had an advantage that |
| 220 | it was possible to place a software breakpoint at 'reset' and |
| 221 | then enter your normal kernel breakpoints once the MMU was mapped |
| 222 | to the kernel mappings (0XC0000000). |
| 223 | |
Masanari Iida | 83fc61a | 2017-09-26 12:47:59 +0900 | [diff] [blame] | 224 | This unfortunately won't work for U-Boot and likely also wont |
Max Filippov | e85e335 | 2012-12-03 15:01:43 +0400 | [diff] [blame] | 225 | work for using KEXEC to have a hot kernel ready for doing a |
| 226 | KDUMP. |
| 227 | |
| 228 | So now the MMU is initialized in head.S but it's necessary to |
| 229 | use hardware breakpoints (gdb 'hbreak' cmd) to break at _startup. |
| 230 | xt-gdb can't place a Software Breakpoint in the 0XD region prior |
| 231 | to mapping the MMU and after mapping even if the area of low memory |
| 232 | was mapped gdb wouldn't remove the breakpoint on hitting it as the |
| 233 | PC wouldn't match. Since Hardware Breakpoints are recommended for |
| 234 | Linux configurations it seems reasonable to just assume they exist |
| 235 | and leave this older mechanism for unfortunate souls that choose |
| 236 | not to follow Tensilica's recommendation. |
| 237 | |
| 238 | Selecting this will cause U-Boot to set the KERNEL Load and Entry |
| 239 | address at 0x00003000 instead of the mapped std of 0xD0003000. |
| 240 | |
| 241 | If in doubt, say Y. |
| 242 | |
Max Filippov | 7bb516ca | 2018-08-12 06:01:40 -0700 | [diff] [blame] | 243 | config MEMMAP_CACHEATTR |
| 244 | hex "Cache attributes for the memory address space" |
| 245 | depends on !MMU |
| 246 | default 0x22222222 |
| 247 | help |
| 248 | These cache attributes are set up for noMMU systems. Each hex digit |
| 249 | specifies cache attributes for the corresponding 512MB memory |
| 250 | region: bits 0..3 -- for addresses 0x00000000..0x1fffffff, |
| 251 | bits 4..7 -- for addresses 0x20000000..0x3fffffff, and so on. |
| 252 | |
| 253 | Cache attribute values are specific for the MMU type, so e.g. |
| 254 | for region protection MMUs: 2 is cache bypass, 4 is WB cached, |
| 255 | 1 is WT cached, f is illegal. For ful MMU: bit 0 makes it executable, |
| 256 | bit 1 makes it writable, bits 2..3 meaning is 0: cache bypass, |
| 257 | 1: WB cache, 2: WT cache, 3: special (c and e are illegal, f is |
| 258 | reserved). |
| 259 | |
Max Filippov | d39af90 | 2016-04-11 21:14:17 +0300 | [diff] [blame] | 260 | config KSEG_PADDR |
| 261 | hex "Physical address of the KSEG mapping" |
| 262 | depends on INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX && MMU |
| 263 | default 0x00000000 |
| 264 | help |
| 265 | This is the physical address where KSEG is mapped. Please refer to |
| 266 | the chosen KSEG layout help for the required address alignment. |
| 267 | Unpacked kernel image (including vectors) must be located completely |
| 268 | within KSEG. |
| 269 | Physical memory below this address is not available to linux. |
| 270 | |
| 271 | If unsure, leave the default value here. |
| 272 | |
Max Filippov | a9f2fc6 | 2016-04-13 05:20:02 +0300 | [diff] [blame] | 273 | config KERNEL_LOAD_ADDRESS |
| 274 | hex "Kernel load address" |
Max Filippov | 73a3eed | 2016-08-04 15:45:32 +0300 | [diff] [blame] | 275 | default 0x60003000 if !MMU |
| 276 | default 0x00003000 if MMU && INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX |
| 277 | default 0xd0003000 if MMU && !INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX |
Max Filippov | a9f2fc6 | 2016-04-13 05:20:02 +0300 | [diff] [blame] | 278 | help |
| 279 | This is the address where the kernel is loaded. |
| 280 | It is virtual address for MMUv2 configurations and physical address |
| 281 | for all other configurations. |
| 282 | |
| 283 | If unsure, leave the default value here. |
| 284 | |
| 285 | config VECTORS_OFFSET |
| 286 | hex "Kernel vectors offset" |
| 287 | default 0x00003000 |
| 288 | help |
| 289 | This is the offset of the kernel image from the relocatable vectors |
| 290 | base. |
| 291 | |
| 292 | If unsure, leave the default value here. |
| 293 | |
Max Filippov | d39af90 | 2016-04-11 21:14:17 +0300 | [diff] [blame] | 294 | choice |
| 295 | prompt "KSEG layout" |
| 296 | depends on MMU |
| 297 | default XTENSA_KSEG_MMU_V2 |
| 298 | |
| 299 | config XTENSA_KSEG_MMU_V2 |
| 300 | bool "MMUv2: 128MB cached + 128MB uncached" |
| 301 | help |
| 302 | MMUv2 compatible kernel memory map: TLB way 5 maps 128MB starting |
| 303 | at KSEG_PADDR to 0xd0000000 with cache and to 0xd8000000 |
| 304 | without cache. |
| 305 | KSEG_PADDR must be aligned to 128MB. |
| 306 | |
| 307 | config XTENSA_KSEG_256M |
| 308 | bool "256MB cached + 256MB uncached" |
| 309 | depends on INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX |
| 310 | help |
| 311 | TLB way 6 maps 256MB starting at KSEG_PADDR to 0xb0000000 |
| 312 | with cache and to 0xc0000000 without cache. |
| 313 | KSEG_PADDR must be aligned to 256MB. |
| 314 | |
| 315 | config XTENSA_KSEG_512M |
| 316 | bool "512MB cached + 512MB uncached" |
| 317 | depends on INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX |
| 318 | help |
| 319 | TLB way 6 maps 512MB starting at KSEG_PADDR to 0xa0000000 |
| 320 | with cache and to 0xc0000000 without cache. |
| 321 | KSEG_PADDR must be aligned to 256MB. |
| 322 | |
| 323 | endchoice |
| 324 | |
Max Filippov | 65559100 | 2014-02-04 02:17:09 +0400 | [diff] [blame] | 325 | config HIGHMEM |
| 326 | bool "High Memory Support" |
Max Filippov | 8a9de05 | 2014-06-16 08:15:43 +0400 | [diff] [blame] | 327 | depends on MMU |
Max Filippov | 65559100 | 2014-02-04 02:17:09 +0400 | [diff] [blame] | 328 | help |
| 329 | Linux can use the full amount of RAM in the system by |
| 330 | default. However, the default MMUv2 setup only maps the |
| 331 | lowermost 128 MB of memory linearly to the areas starting |
| 332 | at 0xd0000000 (cached) and 0xd8000000 (uncached). |
| 333 | When there are more than 128 MB memory in the system not |
| 334 | all of it can be "permanently mapped" by the kernel. |
| 335 | The physical memory that's not permanently mapped is called |
| 336 | "high memory". |
| 337 | |
| 338 | If you are compiling a kernel which will never run on a |
| 339 | machine with more than 128 MB total physical RAM, answer |
| 340 | N here. |
| 341 | |
| 342 | If unsure, say Y. |
| 343 | |
Max Filippov | 9184289 | 2014-08-07 03:32:30 +0400 | [diff] [blame] | 344 | config FAST_SYSCALL_XTENSA |
| 345 | bool "Enable fast atomic syscalls" |
| 346 | default n |
| 347 | help |
| 348 | fast_syscall_xtensa is a syscall that can make atomic operations |
| 349 | on UP kernel when processor has no s32c1i support. |
| 350 | |
| 351 | This syscall is deprecated. It may have issues when called with |
| 352 | invalid arguments. It is provided only for backwards compatibility. |
| 353 | Only enable it if your userspace software requires it. |
| 354 | |
| 355 | If unsure, say N. |
| 356 | |
| 357 | config FAST_SYSCALL_SPILL_REGISTERS |
| 358 | bool "Enable spill registers syscall" |
| 359 | default n |
| 360 | help |
| 361 | fast_syscall_spill_registers is a syscall that spills all active |
| 362 | register windows of a calling userspace task onto its stack. |
| 363 | |
| 364 | This syscall is deprecated. It may have issues when called with |
| 365 | invalid arguments. It is provided only for backwards compatibility. |
| 366 | Only enable it if your userspace software requires it. |
| 367 | |
| 368 | If unsure, say N. |
| 369 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 370 | endmenu |
| 371 | |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 372 | config XTENSA_CALIBRATE_CCOUNT |
| 373 | def_bool n |
| 374 | help |
| 375 | On some platforms (XT2000, for example), the CPU clock rate can |
| 376 | vary. The frequency can be determined, however, by measuring |
| 377 | against a well known, fixed frequency, such as an UART oscillator. |
| 378 | |
| 379 | config SERIAL_CONSOLE |
| 380 | def_bool n |
| 381 | |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 382 | menu "Bus options" |
| 383 | |
| 384 | config PCI |
| 385 | bool "PCI support" |
| 386 | default y |
| 387 | help |
| 388 | Find out whether you have a PCI motherboard. PCI is the name of a |
| 389 | bus system, i.e. the way the CPU talks to the other stuff inside |
| 390 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or |
| 391 | VESA. If you have PCI, say Y, otherwise N. |
| 392 | |
| 393 | source "drivers/pci/Kconfig" |
| 394 | |
Chris Zankel | 35e71f9 | 2009-04-16 00:25:39 -0700 | [diff] [blame] | 395 | endmenu |
| 396 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 397 | menu "Platform options" |
| 398 | |
| 399 | choice |
| 400 | prompt "Xtensa System Type" |
| 401 | default XTENSA_PLATFORM_ISS |
| 402 | |
| 403 | config XTENSA_PLATFORM_ISS |
| 404 | bool "ISS" |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 405 | select XTENSA_CALIBRATE_CCOUNT |
| 406 | select SERIAL_CONSOLE |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 407 | help |
| 408 | ISS is an acronym for Tensilica's Instruction Set Simulator. |
| 409 | |
| 410 | config XTENSA_PLATFORM_XT2000 |
| 411 | bool "XT2000" |
Max Filippov | 4964527 | 2014-06-16 08:25:43 +0400 | [diff] [blame] | 412 | select HAVE_IDE |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 413 | help |
| 414 | XT2000 is the name of Tensilica's feature-rich emulation platform. |
| 415 | This hardware is capable of running a full Linux distribution. |
| 416 | |
Max Filippov | 0d456bad | 2012-11-05 07:37:14 +0400 | [diff] [blame] | 417 | config XTENSA_PLATFORM_XTFPGA |
| 418 | bool "XTFPGA" |
Max Filippov | 61e47e9 | 2014-10-04 04:44:04 +0400 | [diff] [blame] | 419 | select ETHOC if ETHERNET |
Max Filippov | 3de0048 | 2016-07-23 02:47:58 +0300 | [diff] [blame] | 420 | select PLATFORM_WANT_DEFAULT_MEM if !MMU |
Max Filippov | 0d456bad | 2012-11-05 07:37:14 +0400 | [diff] [blame] | 421 | select SERIAL_CONSOLE |
Max Filippov | 0d456bad | 2012-11-05 07:37:14 +0400 | [diff] [blame] | 422 | select XTENSA_CALIBRATE_CCOUNT |
| 423 | help |
| 424 | XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605). |
| 425 | This hardware is capable of running a full Linux distribution. |
| 426 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 427 | endchoice |
| 428 | |
Max Filippov | 994fa1c | 2018-08-13 18:11:38 -0700 | [diff] [blame] | 429 | config PLATFORM_NR_IRQS |
| 430 | int |
| 431 | default 3 if XTENSA_PLATFORM_XT2000 |
| 432 | default 0 |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 433 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 434 | config XTENSA_CPU_CLOCK |
| 435 | int "CPU clock rate [MHz]" |
| 436 | depends on !XTENSA_CALIBRATE_CCOUNT |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 437 | default 16 |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 438 | |
| 439 | config GENERIC_CALIBRATE_DELAY |
| 440 | bool "Auto calibration of the BogoMIPS value" |
Johannes Weiner | 35f9cd08 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 441 | help |
Chris Zankel | 82300bf | 2005-06-30 02:58:58 -0700 | [diff] [blame] | 442 | The BogoMIPS value can easily be derived from the CPU frequency. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 443 | |
| 444 | config CMDLINE_BOOL |
| 445 | bool "Default bootloader kernel arguments" |
| 446 | |
| 447 | config CMDLINE |
| 448 | string "Initial kernel command string" |
| 449 | depends on CMDLINE_BOOL |
| 450 | default "console=ttyS0,38400 root=/dev/ram" |
| 451 | help |
| 452 | On some architectures (EBSA110 and CATS), there is currently no way |
| 453 | for the boot loader to pass arguments to the kernel. For these |
| 454 | architectures, you should supply some command-line options at build |
| 455 | time by entering them here. As a minimum, you should specify the |
| 456 | memory size and the root device (e.g., mem=64M root=/dev/nfs). |
| 457 | |
Max Filippov | da844a8 | 2012-11-04 00:30:13 +0400 | [diff] [blame] | 458 | config USE_OF |
| 459 | bool "Flattened Device Tree support" |
| 460 | select OF |
| 461 | select OF_EARLY_FLATTREE |
Max Filippov | 4e7c84e | 2016-07-19 00:37:05 +0300 | [diff] [blame] | 462 | select OF_RESERVED_MEM |
Max Filippov | da844a8 | 2012-11-04 00:30:13 +0400 | [diff] [blame] | 463 | help |
| 464 | Include support for flattened device tree machine descriptions. |
| 465 | |
| 466 | config BUILTIN_DTB |
| 467 | string "DTB to build into the kernel image" |
| 468 | depends on OF |
| 469 | |
Max Filippov | baac1d36 | 2018-08-13 18:56:37 -0700 | [diff] [blame] | 470 | config PARSE_BOOTPARAM |
| 471 | bool "Parse bootparam block" |
| 472 | default y |
| 473 | help |
| 474 | Parse parameters passed to the kernel from the bootloader. It may |
| 475 | be disabled if the kernel is known to run without the bootloader. |
| 476 | |
| 477 | If unsure, say Y. |
| 478 | |
Victor Prupis | b6c7e87 | 2008-05-19 14:50:38 -0700 | [diff] [blame] | 479 | config BLK_DEV_SIMDISK |
| 480 | tristate "Host file-based simulated block device support" |
| 481 | default n |
Max Filippov | 7a0684c | 2014-08-27 14:54:48 +0400 | [diff] [blame] | 482 | depends on XTENSA_PLATFORM_ISS && BLOCK |
Victor Prupis | b6c7e87 | 2008-05-19 14:50:38 -0700 | [diff] [blame] | 483 | help |
| 484 | Create block devices that map to files in the host file system. |
| 485 | Device binding to host file may be changed at runtime via proc |
| 486 | interface provided the device is not in use. |
| 487 | |
| 488 | config BLK_DEV_SIMDISK_COUNT |
| 489 | int "Number of host file-based simulated block devices" |
| 490 | range 1 10 |
| 491 | depends on BLK_DEV_SIMDISK |
| 492 | default 2 |
| 493 | help |
| 494 | This is the default minimal number of created block devices. |
| 495 | Kernel/module parameter 'simdisk_count' may be used to change this |
| 496 | value at runtime. More file names (but no more than 10) may be |
| 497 | specified as parameters, simdisk_count grows accordingly. |
| 498 | |
| 499 | config SIMDISK0_FILENAME |
| 500 | string "Host filename for the first simulated device" |
| 501 | depends on BLK_DEV_SIMDISK = y |
| 502 | default "" |
| 503 | help |
| 504 | Attach a first simdisk to a host file. Conventionally, this file |
| 505 | contains a root file system. |
| 506 | |
| 507 | config SIMDISK1_FILENAME |
| 508 | string "Host filename for the second simulated device" |
| 509 | depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1 |
| 510 | default "" |
| 511 | help |
| 512 | Another simulated disk in a host file for a buildroot-independent |
| 513 | storage. |
| 514 | |
Max Filippov | a9df933 | 2015-11-02 17:51:02 +0300 | [diff] [blame] | 515 | config FORCE_MAX_ZONEORDER |
| 516 | int "Maximum zone order" |
| 517 | default "11" |
| 518 | help |
| 519 | The kernel memory allocator divides physically contiguous memory |
| 520 | blocks into "zones", where each zone is a power of two number of |
| 521 | pages. This option selects the largest power of two that the kernel |
| 522 | keeps in the memory allocator. If you need to allocate very large |
| 523 | blocks of physically contiguous memory, then you may need to |
| 524 | increase this value. |
| 525 | |
| 526 | This config option is actually maximum order plus one. For example, |
| 527 | a value of 11 means that the largest free memory block is 2^10 pages. |
| 528 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 529 | source "drivers/pcmcia/Kconfig" |
| 530 | |
Max Filippov | 3932b9c | 2014-10-04 04:45:39 +0400 | [diff] [blame] | 531 | config PLATFORM_WANT_DEFAULT_MEM |
| 532 | def_bool n |
| 533 | |
| 534 | config DEFAULT_MEM_START |
Max Filippov | aea731c | 2018-08-13 16:45:54 -0700 | [diff] [blame] | 535 | hex |
| 536 | prompt "PAGE_OFFSET/PHYS_OFFSET" if !MMU && PLATFORM_WANT_DEFAULT_MEM |
| 537 | default 0x60000000 if PLATFORM_WANT_DEFAULT_MEM |
| 538 | default 0x00000000 |
Max Filippov | 3932b9c | 2014-10-04 04:45:39 +0400 | [diff] [blame] | 539 | help |
Max Filippov | aea731c | 2018-08-13 16:45:54 -0700 | [diff] [blame] | 540 | This is the base address used for both PAGE_OFFSET and PHYS_OFFSET |
| 541 | in noMMU configurations. |
Max Filippov | 3932b9c | 2014-10-04 04:45:39 +0400 | [diff] [blame] | 542 | |
| 543 | If unsure, leave the default value here. |
| 544 | |
Max Filippov | 4949009 | 2015-02-27 06:28:00 +0300 | [diff] [blame] | 545 | config XTFPGA_LCD |
| 546 | bool "Enable XTFPGA LCD driver" |
| 547 | depends on XTENSA_PLATFORM_XTFPGA |
| 548 | default n |
| 549 | help |
| 550 | There's a 2x16 LCD on most of XTFPGA boards, kernel may output |
| 551 | progress messages there during bootup/shutdown. It may be useful |
| 552 | during board bringup. |
| 553 | |
| 554 | If unsure, say N. |
| 555 | |
| 556 | config XTFPGA_LCD_BASE_ADDR |
| 557 | hex "XTFPGA LCD base address" |
| 558 | depends on XTFPGA_LCD |
| 559 | default "0x0d0c0000" |
| 560 | help |
| 561 | Base address of the LCD controller inside KIO region. |
| 562 | Different boards from XTFPGA family have LCD controller at different |
| 563 | addresses. Please consult prototyping user guide for your board for |
| 564 | the correct address. Wrong address here may lead to hardware lockup. |
| 565 | |
| 566 | config XTFPGA_LCD_8BIT_ACCESS |
| 567 | bool "Use 8-bit access to XTFPGA LCD" |
| 568 | depends on XTFPGA_LCD |
| 569 | default n |
| 570 | help |
| 571 | LCD may be connected with 4- or 8-bit interface, 8-bit access may |
| 572 | only be used with 8-bit interface. Please consult prototyping user |
| 573 | guide for your board for the correct interface width. |
| 574 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 575 | endmenu |
| 576 | |
Max Filippov | e00d8b2 | 2014-10-29 01:42:01 +0300 | [diff] [blame] | 577 | menu "Power management options" |
| 578 | |
| 579 | source "kernel/power/Kconfig" |
| 580 | |
| 581 | endmenu |