1 # SPDX-License-Identifier: GPL-2.0 !! 1 # SPDX-License-Identifier: GPL-2.0-only
2 # Hexagon configuration !! 2 config 64BIT
3 comment "Linux Kernel Configuration for Hexago !! 3 bool "64-bit kernel" if "$(ARCH)" = "sparc"
4 !! 4 default "$(ARCH)" = "sparc64"
5 config HEXAGON !! 5 help
6 def_bool y !! 6 SPARC is a family of RISC microprocessors designed and marketed by
7 select ARCH_32BIT_OFF_T !! 7 Sun Microsystems, incorporated. They are very widely found in Sun
8 select ARCH_HAS_SYNC_DMA_FOR_DEVICE !! 8 workstations and clones.
9 select ARCH_NO_PREEMPT !! 9
10 select ARCH_WANT_FRAME_POINTERS !! 10 Say yes to build a 64-bit kernel - formerly known as sparc64
11 select DMA_GLOBAL_POOL !! 11 Say no to build a 32-bit kernel - formerly known as sparc
12 select HAVE_PAGE_SIZE_4KB !! 12
13 select HAVE_PAGE_SIZE_16KB !! 13 config SPARC
14 select HAVE_PAGE_SIZE_64KB !! 14 bool
15 select HAVE_PAGE_SIZE_256KB !! 15 default y
16 select FRAME_POINTER !! 16 select ARCH_HAS_CPU_CACHE_ALIASING
17 # Other pending projects/to-do items. !! 17 select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
18 # select HAVE_REGS_AND_STACK_ACCESS_AP !! 18 select ARCH_MIGHT_HAVE_PC_SERIO
19 # select HAVE_HW_BREAKPOINT if PERF_EV !! 19 select DMA_OPS
20 # select ARCH_HAS_CPU_IDLE_WAIT !! 20 select OF
21 # select GPIOLIB !! 21 select OF_PROMTREE
22 # select HAVE_CLK !! 22 select HAVE_ASM_MODVERSIONS
23 # select GENERIC_PENDING_IRQ if SMP !! 23 select HAVE_ARCH_KGDB if !SMP || SPARC64
24 select GENERIC_ATOMIC64 <<
25 select HAVE_PERF_EVENTS <<
26 # GENERIC_ALLOCATOR is used by dma_all <<
27 select GENERIC_ALLOCATOR <<
28 select GENERIC_IRQ_PROBE <<
29 select GENERIC_IRQ_SHOW <<
30 select HAVE_ARCH_KGDB <<
31 select HAVE_ARCH_TRACEHOOK 24 select HAVE_ARCH_TRACEHOOK
32 select NEED_SG_DMA_LENGTH !! 25 select HAVE_ARCH_SECCOMP if SPARC64
33 select NO_IOPORT_MAP !! 26 select HAVE_EXIT_THREAD
34 select GENERIC_IOMAP !! 27 select HAVE_PCI
35 select GENERIC_IOREMAP !! 28 select SYSCTL_EXCEPTION_TRACE
>> 29 select RTC_CLASS
>> 30 select RTC_DRV_M48T59
>> 31 select RTC_SYSTOHC
>> 32 select HAVE_ARCH_JUMP_LABEL if SPARC64
>> 33 select GENERIC_IRQ_SHOW
>> 34 select ARCH_WANT_IPC_PARSE_VERSION
>> 35 select GENERIC_PCI_IOMAP
>> 36 select HAS_IOPORT
>> 37 select HAVE_HARDLOCKUP_DETECTOR_SPARC64 if SPARC64
>> 38 select HAVE_CBPF_JIT if SPARC32
>> 39 select HAVE_EBPF_JIT if SPARC64
>> 40 select HAVE_DEBUG_BUGVERBOSE
36 select GENERIC_SMP_IDLE_THREAD 41 select GENERIC_SMP_IDLE_THREAD
37 select STACKTRACE_SUPPORT <<
38 select GENERIC_CLOCKEVENTS_BROADCAST <<
39 select LOCK_MM_AND_FIND_VMA <<
40 select MODULES_USE_ELF_RELA 42 select MODULES_USE_ELF_RELA
41 select GENERIC_CPU_DEVICES !! 43 select PCI_SYSCALL if PCI
42 select ARCH_WANT_LD_ORPHAN_WARN !! 44 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
>> 45 select ODD_RT_SIGACTION
>> 46 select OLD_SIGSUSPEND
>> 47 select CPU_NO_EFFICIENT_FFS
>> 48 select LOCKDEP_SMALL if LOCKDEP
>> 49 select NEED_DMA_MAP_STATE
>> 50 select NEED_SG_DMA_LENGTH
43 select TRACE_IRQFLAGS_SUPPORT 51 select TRACE_IRQFLAGS_SUPPORT
44 help <<
45 Qualcomm Hexagon is a processor arch <<
46 performance and low power across a w <<
47 52
48 config HEXAGON_PHYS_OFFSET !! 53 config SPARC32
49 def_bool y !! 54 def_bool !64BIT
50 help !! 55 select ARCH_32BIT_OFF_T
51 Platforms that don't load the kernel !! 56 select ARCH_HAS_CPU_FINALIZE_INIT if !SMP
>> 57 select ARCH_HAS_SYNC_DMA_FOR_CPU
>> 58 select CLZ_TAB
>> 59 select DMA_DIRECT_REMAP
>> 60 select GENERIC_ATOMIC64
>> 61 select GENERIC_LIB_CMPDI2
>> 62 select GENERIC_LIB_UCMPDI2
>> 63 select HAVE_UID16
>> 64 select HAVE_PAGE_SIZE_4KB
>> 65 select LOCK_MM_AND_FIND_VMA
>> 66 select OLD_SIGACTION
>> 67 select ZONE_DMA
52 68
53 config LOCKDEP_SUPPORT !! 69 config SPARC64
>> 70 def_bool 64BIT
>> 71 select ALTERNATE_USER_ADDRESS_SPACE
>> 72 select HAVE_FUNCTION_TRACER
>> 73 select HAVE_FUNCTION_GRAPH_TRACER
>> 74 select HAVE_KRETPROBES
>> 75 select HAVE_KPROBES
>> 76 select MMU_GATHER_RCU_TABLE_FREE if SMP
>> 77 select MMU_GATHER_MERGE_VMAS
>> 78 select MMU_GATHER_NO_FLUSH_CACHE
>> 79 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
>> 80 select HAVE_DYNAMIC_FTRACE
>> 81 select HAVE_FTRACE_MCOUNT_RECORD
>> 82 select HAVE_PAGE_SIZE_8KB
>> 83 select HAVE_SYSCALL_TRACEPOINTS
>> 84 select HAVE_CONTEXT_TRACKING_USER
>> 85 select HAVE_TIF_NOHZ
>> 86 select HAVE_DEBUG_KMEMLEAK
>> 87 select IOMMU_HELPER
>> 88 select SPARSE_IRQ
>> 89 select RTC_DRV_CMOS
>> 90 select RTC_DRV_BQ4802
>> 91 select RTC_DRV_SUN4V
>> 92 select RTC_DRV_STARFIRE
>> 93 select HAVE_PERF_EVENTS
>> 94 select PERF_USE_VMALLOC
>> 95 select ARCH_HAVE_NMI_SAFE_CMPXCHG
>> 96 select HAVE_C_RECORDMCOUNT
>> 97 select HAVE_ARCH_AUDITSYSCALL
>> 98 select ARCH_SUPPORTS_ATOMIC_RMW
>> 99 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
>> 100 select HAVE_NMI
>> 101 select HAVE_REGS_AND_STACK_ACCESS_API
>> 102 select ARCH_USE_QUEUED_RWLOCKS
>> 103 select ARCH_USE_QUEUED_SPINLOCKS
>> 104 select GENERIC_TIME_VSYSCALL
>> 105 select ARCH_CLOCKSOURCE_DATA
>> 106 select ARCH_HAS_PTE_SPECIAL
>> 107 select PCI_DOMAINS if PCI
>> 108 select ARCH_HAS_GIGANTIC_PAGE
>> 109 select HAVE_SOFTIRQ_ON_OWN_STACK
>> 110 select HAVE_SETUP_PER_CPU_AREA
>> 111 select NEED_PER_CPU_EMBED_FIRST_CHUNK
>> 112 select NEED_PER_CPU_PAGE_FIRST_CHUNK
>> 113
>> 114 config ARCH_PROC_KCORE_TEXT
54 def_bool y 115 def_bool y
55 116
56 config EARLY_PRINTK !! 117 config CPU_BIG_ENDIAN
57 def_bool y 118 def_bool y
58 119
>> 120 config STACKTRACE_SUPPORT
>> 121 bool
>> 122 default y if SPARC64
>> 123
>> 124 config LOCKDEP_SUPPORT
>> 125 bool
>> 126 default y if SPARC64
>> 127
>> 128 config ARCH_HIBERNATION_POSSIBLE
>> 129 def_bool y if SPARC64
>> 130
>> 131 config AUDIT_ARCH
>> 132 bool
>> 133 default y
>> 134
59 config MMU 135 config MMU
60 def_bool y !! 136 bool
>> 137 default y
61 138
62 config GENERIC_CSUM !! 139 config HIGHMEM
63 def_bool y !! 140 bool
>> 141 default y if SPARC32
>> 142 select KMAP_LOCAL
>> 143
>> 144 config PGTABLE_LEVELS
>> 145 default 4 if 64BIT
>> 146 default 3
64 147
65 config GENERIC_HWEIGHT !! 148 config ARCH_SUPPORTS_UPROBES
66 def_bool y !! 149 def_bool y if SPARC64
67 150
68 config STACKTRACE_SUPPORT !! 151 menu "Processor type and features"
69 def_bool y <<
70 select STACKTRACE <<
71 152
72 config GENERIC_BUG !! 153 config SMP
73 def_bool y !! 154 bool "Symmetric multi-processing support"
74 depends on BUG !! 155 help
>> 156 This enables support for systems with more than one CPU. If you have
>> 157 a system with only one CPU, say N. If you have a system with more
>> 158 than one CPU, say Y.
>> 159
>> 160 If you say N here, the kernel will run on uni- and multiprocessor
>> 161 machines, but will use only one CPU of a multiprocessor machine. If
>> 162 you say Y here, the kernel will run on many, but not all,
>> 163 uniprocessor machines. On a uniprocessor machine, the kernel
>> 164 will run faster if you say N here.
>> 165
>> 166 People using multiprocessor machines who say Y here should also say
>> 167 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
>> 168 Management" code will be disabled if you say Y here.
>> 169
>> 170 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
>> 171 available at <https://www.tldp.org/docs.html#howto>.
75 172
76 menu "Machine selection" !! 173 If you don't know what to do here, say N.
77 174
78 choice !! 175 config NR_CPUS
79 prompt "System type" !! 176 int "Maximum number of CPUs"
80 default HEXAGON_COMET !! 177 depends on SMP
>> 178 range 2 32 if SPARC32
>> 179 range 2 4096 if SPARC64
>> 180 default 32 if SPARC32
>> 181 default 4096 if SPARC64
>> 182
>> 183 source "kernel/Kconfig.hz"
>> 184
>> 185 config GENERIC_HWEIGHT
>> 186 bool
>> 187 default y
>> 188
>> 189 config GENERIC_CALIBRATE_DELAY
>> 190 bool
>> 191 default y
>> 192
>> 193 config ARCH_MAY_HAVE_PC_FDC
>> 194 bool
>> 195 default y
>> 196
>> 197 config EMULATED_CMPXCHG
>> 198 bool
>> 199 default y if SPARC32
>> 200 help
>> 201 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
>> 202 is emulated, and therefore it is not completely atomic.
81 203
82 config HEXAGON_COMET !! 204 # Makefile helpers
83 bool "Comet Board" !! 205 config SPARC32_SMP
>> 206 bool
>> 207 default y
>> 208 depends on SPARC32 && SMP
>> 209
>> 210 config SPARC64_SMP
>> 211 bool
>> 212 default y
>> 213 depends on SPARC64 && SMP
>> 214
>> 215 config EARLYFB
>> 216 bool "Support for early boot text console"
>> 217 default y
>> 218 depends on SPARC64
>> 219 select FONT_SUN8x16
>> 220 select FONT_SUPPORT
84 help 221 help
85 Support for the Comet platform. !! 222 Say Y here to enable a faster early framebuffer boot console.
86 223
87 endchoice !! 224 config HOTPLUG_CPU
>> 225 bool "Support for hot-pluggable CPUs"
>> 226 depends on SPARC64 && SMP
>> 227 help
>> 228 Say Y here to experiment with turning CPUs off and on. CPUs
>> 229 can be controlled through /sys/devices/system/cpu/cpu#.
>> 230 Say N if you want to disable CPU hotplug.
>> 231
>> 232 if SPARC64
>> 233 source "drivers/cpufreq/Kconfig"
>> 234 endif
>> 235
>> 236 config US3_MC
>> 237 tristate "UltraSPARC-III Memory Controller driver"
>> 238 depends on SPARC64
>> 239 default y
>> 240 help
>> 241 This adds a driver for the UltraSPARC-III memory controller.
>> 242 Loading this driver allows exact mnemonic strings to be
>> 243 printed in the event of a memory error, so that the faulty DIMM
>> 244 on the motherboard can be matched to the error.
>> 245
>> 246 If in doubt, say Y, as this information can be very useful.
>> 247
>> 248 # Global things across all Sun machines.
>> 249 config GENERIC_LOCKBREAK
>> 250 bool
>> 251 default y
>> 252 depends on SPARC64 && SMP && PREEMPTION
>> 253
>> 254 config NUMA
>> 255 bool "NUMA support"
>> 256 depends on SPARC64 && SMP
>> 257
>> 258 config NODES_SHIFT
>> 259 int "Maximum NUMA Nodes (as a power of 2)"
>> 260 range 4 5 if SPARC64
>> 261 default "5"
>> 262 depends on NUMA
>> 263 help
>> 264 Specify the maximum number of NUMA Nodes available on the target
>> 265 system. Increases memory reserved to accommodate various tables.
88 266
89 config HEXAGON_ARCH_VERSION !! 267 config ARCH_SPARSEMEM_ENABLE
90 int "Architecture version" !! 268 def_bool y if SPARC64
91 default 2 !! 269 select SPARSEMEM_VMEMMAP_ENABLE
>> 270
>> 271 config ARCH_SPARSEMEM_DEFAULT
>> 272 def_bool y if SPARC64
>> 273
>> 274 config ARCH_FORCE_MAX_ORDER
>> 275 int "Order of maximal physically contiguous allocations"
>> 276 default "12"
>> 277 help
>> 278 The kernel page allocator limits the size of maximal physically
>> 279 contiguous allocations. The limit is called MAX_PAGE_ORDER and it
>> 280 defines the maximal power of two of number of pages that can be
>> 281 allocated as a single contiguous block. This option allows
>> 282 overriding the default setting when ability to allocate very
>> 283 large blocks of physically contiguous memory is required.
>> 284
>> 285 Don't change if unsure.
>> 286
>> 287 if SPARC64 || COMPILE_TEST
>> 288 source "kernel/power/Kconfig"
>> 289 endif
>> 290
>> 291 config SCHED_SMT
>> 292 bool "SMT (Hyperthreading) scheduler support"
>> 293 depends on SPARC64 && SMP
>> 294 default y
>> 295 help
>> 296 SMT scheduler support improves the CPU scheduler's decision making
>> 297 when dealing with SPARC cpus at a cost of slightly increased overhead
>> 298 in some places. If unsure say N here.
>> 299
>> 300 config SCHED_MC
>> 301 bool "Multi-core scheduler support"
>> 302 depends on SPARC64 && SMP
>> 303 default y
>> 304 help
>> 305 Multi-core scheduler support improves the CPU scheduler's decision
>> 306 making when dealing with multi-core CPU chips at a cost of slightly
>> 307 increased overhead in some places. If unsure say N here.
>> 308
>> 309 config CMDLINE_BOOL
>> 310 bool "Default bootloader kernel arguments"
>> 311 depends on SPARC64
92 312
93 config CMDLINE 313 config CMDLINE
94 string "Default kernel command string" !! 314 string "Initial kernel command string"
95 default "" !! 315 depends on CMDLINE_BOOL
>> 316 default "console=ttyS0,9600 root=/dev/sda1"
>> 317 help
>> 318 Say Y here if you want to be able to pass default arguments to
>> 319 the kernel. This will be overridden by the bootloader, if you
>> 320 use one (such as SILO). This is most useful if you want to boot
>> 321 a kernel from TFTP, and want default options to be available
>> 322 with having them passed on the command line.
>> 323
>> 324 NOTE: This option WILL override the PROM bootargs setting!
>> 325
>> 326 config SUN_PM
>> 327 bool
>> 328 default y if SPARC32
96 help 329 help
97 On some platforms, there is currentl !! 330 Enable power management and CPU standby features on supported
98 to pass arguments to the kernel. For !! 331 SPARC platforms.
99 command-line options at build time b <<
100 minimum, you should specify the memo <<
101 (e.g., mem=64M root=/dev/nfs). <<
102 332
103 config SMP !! 333 config SPARC_LED
104 bool "Multi-Processing support" !! 334 tristate "Sun4m LED driver"
>> 335 depends on SPARC32
>> 336 help
>> 337 This driver toggles the front-panel LED on sun4m systems
>> 338 in a user-specifiable manner. Its state can be probed
>> 339 by reading /proc/led and its blinking mode can be changed
>> 340 via writes to /proc/led
>> 341
>> 342 config SERIAL_CONSOLE
>> 343 bool
>> 344 depends on SPARC32
>> 345 default y
105 help 346 help
106 Enables SMP support in the kernel. !! 347 If you say Y here, it will be possible to use a serial port as the
>> 348 system console (the system console is the device which receives all
>> 349 kernel messages and warnings and which allows logins in single user
>> 350 mode). This could be useful if some terminal or printer is connected
>> 351 to that serial port.
>> 352
>> 353 Even if you say Y here, the currently visible virtual console
>> 354 (/dev/tty0) will still be used as the system console by default, but
>> 355 you can alter that using a kernel command line option such as
>> 356 "console=ttyS1". (Try "man bootparam" or see the documentation of
>> 357 your boot loader (silo) about how to pass options to the kernel at
>> 358 boot time.)
>> 359
>> 360 If you don't have a graphics card installed and you say Y here, the
>> 361 kernel will automatically use the first serial line, /dev/ttyS0, as
>> 362 system console.
>> 363
>> 364 If unsure, say N.
>> 365
>> 366 config SPARC_LEON
>> 367 bool "Sparc Leon processor family"
>> 368 depends on SPARC32
>> 369 select USB_EHCI_BIG_ENDIAN_MMIO
>> 370 select USB_EHCI_BIG_ENDIAN_DESC
>> 371 select USB_UHCI_BIG_ENDIAN_MMIO
>> 372 select USB_UHCI_BIG_ENDIAN_DESC
>> 373 help
>> 374 If you say Y here if you are running on a SPARC-LEON processor.
>> 375 The LEON processor is a synthesizable VHDL model of the
>> 376 SPARC-v8 standard. LEON is part of the GRLIB collection of
>> 377 IP cores that are distributed under GPL. GRLIB can be downloaded
>> 378 from www.gaisler.com. You can download a sparc-linux cross-compilation
>> 379 toolchain at www.gaisler.com.
>> 380
>> 381 if SPARC_LEON
>> 382 menu "U-Boot options"
>> 383
>> 384 config UBOOT_LOAD_ADDR
>> 385 hex "uImage Load Address"
>> 386 default 0x40004000
>> 387 help
>> 388 U-Boot kernel load address, the address in physical address space
>> 389 where u-boot will place the Linux kernel before booting it.
>> 390 This address is normally the base address of main memory + 0x4000.
>> 391
>> 392 config UBOOT_FLASH_ADDR
>> 393 hex "uImage.o Load Address"
>> 394 default 0x00080000
>> 395 help
>> 396 Optional setting only affecting the uImage.o ELF-image used to
>> 397 download the uImage file to the target using a ELF-loader other than
>> 398 U-Boot. It may for example be used to download an uImage to FLASH with
>> 399 the GRMON utility before even starting u-boot.
>> 400
>> 401 config UBOOT_ENTRY_ADDR
>> 402 hex "uImage Entry Address"
>> 403 default 0xf0004000
>> 404 help
>> 405 Do not change this unless you know what you're doing. This is
>> 406 hardcoded by the SPARC32 and LEON port.
107 407
108 config NR_CPUS !! 408 This is the virtual address u-boot jumps to when booting the Linux
109 int "Maximum number of CPUs" if SMP !! 409 Kernel.
110 range 2 6 if SMP <<
111 default "1" if !SMP <<
112 default "6" if SMP <<
113 help <<
114 This allows you to specify the maxim <<
115 kernel will support. The maximum su <<
116 minimum value which makes sense is 2 <<
117 410
118 This is purely to save memory - each !! 411 endmenu
119 approximately eight kilobytes to the !! 412 endif
120 413
121 source "kernel/Kconfig.hz" !! 414 endmenu
>> 415
>> 416 menu "Bus options (PCI etc.)"
>> 417 config SBUS
>> 418 bool
>> 419 default y
>> 420
>> 421 config SBUSCHAR
>> 422 bool
>> 423 default y
>> 424
>> 425 config SUN_LDOMS
>> 426 bool "Sun Logical Domains support"
>> 427 depends on SPARC64
>> 428 help
>> 429 Say Y here is you want to support virtual devices via
>> 430 Logical Domains.
>> 431
>> 432 config PCIC_PCI
>> 433 bool
>> 434 depends on PCI && SPARC32 && !SPARC_LEON
>> 435 default y
>> 436
>> 437 config LEON_PCI
>> 438 bool
>> 439 depends on PCI && SPARC_LEON
>> 440 default y
>> 441
>> 442 config SPARC_GRPCI1
>> 443 bool "GRPCI Host Bridge Support"
>> 444 depends on LEON_PCI
>> 445 default y
>> 446 help
>> 447 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
>> 448 PCI host controller is typically found in GRLIB SPARC32/LEON
>> 449 systems. The driver has one property (all_pci_errors) controlled
>> 450 from the bootloader that makes the GRPCI to generate interrupts
>> 451 on detected PCI Parity and System errors.
>> 452
>> 453 config SPARC_GRPCI2
>> 454 bool "GRPCI2 Host Bridge Support"
>> 455 depends on LEON_PCI
>> 456 default y
>> 457 help
>> 458 Say Y here to include the GRPCI2 Host Bridge Driver.
>> 459
>> 460 config SUN_OPENPROMFS
>> 461 tristate "Openprom tree appears in /proc/openprom"
>> 462 help
>> 463 If you say Y, the OpenPROM device tree will be available as a
>> 464 virtual file system, which you can mount to /proc/openprom by "mount
>> 465 -t openpromfs none /proc/openprom".
>> 466
>> 467 To compile the /proc/openprom support as a module, choose M here: the
>> 468 module will be called openpromfs.
>> 469
>> 470 Only choose N if you know in advance that you will not need to modify
>> 471 OpenPROM settings on the running system.
>> 472
>> 473 # Makefile helpers
>> 474 config SPARC64_PCI
>> 475 bool
>> 476 default y
>> 477 depends on SPARC64 && PCI
>> 478
>> 479 config SPARC64_PCI_MSI
>> 480 bool
>> 481 default y
>> 482 depends on SPARC64_PCI && PCI_MSI
122 483
123 endmenu 484 endmenu
>> 485
>> 486 config COMPAT
>> 487 bool
>> 488 depends on SPARC64
>> 489 default y
>> 490 select HAVE_UID16
>> 491 select ARCH_WANT_OLD_COMPAT_IPC
>> 492 select COMPAT_OLD_SIGACTION
>> 493
>> 494 source "drivers/sbus/char/Kconfig"
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