1 ## SPDX-License-Identifier: GPL-2.0-only
5 config HAVE_VGA_TEXT_FRAMEBUFFER
7 depends on !(NO_GFX_INIT && NO_EARLY_GFX_INIT)
9 Selected by graphics drivers that support legacy VGA text mode.
11 config HAVE_VBE_LINEAR_FRAMEBUFFER
13 depends on !NO_GFX_INIT
15 Selected by graphics drivers that can set up a VBE linear-framebuffer
18 config HAVE_LINEAR_FRAMEBUFFER
20 depends on !NO_GFX_INIT
22 Selected by graphics drivers that can set up a generic linear
28 Selected by drivers that support to run a blob that implements
29 the Graphics Output Protocol (GOP).
31 config MAINBOARD_NO_FSP_GOP
34 Selected by mainboards that do not have any graphics ports connected to the SoC.
36 config MAINBOARD_HAS_NATIVE_VGA_INIT
39 Selected by mainboards / drivers that provide native graphics
42 config MAINBOARD_FORCE_NATIVE_VGA_INIT
44 depends on MAINBOARD_HAS_NATIVE_VGA_INIT || MAINBOARD_HAS_LIBGFXINIT
46 Selected by mainboards / chipsets whose graphics driver can't or
47 shouldn't be disabled.
49 config VGA_ROM_RUN_DEFAULT
52 Selected by mainboards whose graphics initialization depends on VGA OpROM.
53 coreboot needs to load/execute legacy VGA OpROM in order to initialize GFX.
55 config MAINBOARD_HAS_LIBGFXINIT
58 Selected by mainboards that implement support for `libgfxinit`.
59 Usually this requires a list of ports to be probed for displays.
61 config MAINBOARD_HAS_EARLY_LIBGFXINIT
64 Selected by mainboards that implement early (cache-as-ram
65 stage) support of `libgfxinit`. Usually this requires a list
66 of ports to be probed for displays.
69 prompt "Graphics initialization"
70 default NO_GFX_INIT if VGA_ROM_RUN_DEFAULT && PAYLOAD_SEABIOS
71 default VGA_ROM_RUN if VGA_ROM_RUN_DEFAULT
72 default MAINBOARD_DO_NATIVE_VGA_INIT
73 default MAINBOARD_USE_LIBGFXINIT
74 default RUN_FSP_GOP if INTEL_GMA_HAVE_VBT
76 config MAINBOARD_DO_NATIVE_VGA_INIT
77 bool "Use native graphics init"
78 depends on MAINBOARD_HAS_NATIVE_VGA_INIT
80 Some mainboards, such as the Google Link, allow initializing the
81 display without the need of a binary only VGA OPROM. Enabling this
82 option may be faster, but also lacks flexibility in setting modes.
84 config MAINBOARD_USE_LIBGFXINIT
86 depends on MAINBOARD_HAS_LIBGFXINIT
87 select HAVE_VGA_TEXT_FRAMEBUFFER
88 select HAVE_LINEAR_FRAMEBUFFER
89 select VGA if VGA_TEXT_FRAMEBUFFER
91 Use the SPARK library `libgfxinit` for the native graphics
92 initialization. This requires an Ada toolchain.
94 # TODO: Explain differences (if any) for onboard cards.
96 bool "Run VGA Option ROMs"
97 depends on PCI && (ARCH_X86 || ARCH_PPC64) && !MAINBOARD_FORCE_NATIVE_VGA_INIT
98 select HAVE_VGA_TEXT_FRAMEBUFFER
100 Execute VGA Option ROMs in coreboot if found. This can be used
101 to enable PCI/AGP/PCI-E video cards when not using a SeaBIOS
104 When using a SeaBIOS payload it runs all option ROMs with much
105 more complete BIOS interrupt services available than coreboot,
106 which some option ROMs require in order to function correctly.
109 bool "Run a GOP driver"
110 depends on HAVE_FSP_GOP && !MAINBOARD_NO_FSP_GOP
111 select HAVE_LINEAR_FRAMEBUFFER
113 Some platforms (e.g. Intel Braswell and Skylake/Kaby Lake) support
114 to run a GOP blob. This option enables graphics initialization with
119 depends on !MAINBOARD_FORCE_NATIVE_VGA_INIT
121 Select this to not perform any graphics initialization in
122 coreboot. This is useful if the payload (e.g. SeaBIOS) can
123 initialize graphics or if pre-boot graphics are not required.
128 prompt "Early (romstage) graphics initialization"
129 default MAINBOARD_USE_EARLY_LIBGFXINIT if MAINBOARD_HAS_EARLY_LIBGFXINIT
130 default NO_EARLY_GFX_INIT
132 config NO_EARLY_GFX_INIT
135 Select this to not perform any graphics initialization at
138 config MAINBOARD_USE_EARLY_LIBGFXINIT
139 bool "Use libgfxinit"
140 depends on MAINBOARD_HAS_EARLY_LIBGFXINIT
143 Use the SPARK library `libgfxinit` for the romstage native
144 graphics initialization. This requires an Ada
145 toolchain. Graphics at romstage is limited to VGA text mode.
149 config PRE_GRAPHICS_DELAY_MS
150 int "Graphics initialization delay in ms"
152 depends on VGA_ROM_RUN
154 On some systems, coreboot boots so fast that connected monitors
155 (mostly TVs) won't be able to wake up fast enough to talk to the
156 VBIOS. On those systems we need to wait for a bit before executing
159 config ONBOARD_VGA_IS_PRIMARY
160 bool "Use onboard VGA as primary video device"
164 This option lets you select which VGA device will be used
165 to decode legacy VGA cycles. Not all chipsets implement this
166 however. If not selected, the last adapter found will be used,
167 else the onboard adapter is used.
169 config S3_VGA_ROM_RUN
170 bool "Re-run VGA Option ROMs on S3 resume"
172 depends on VGA_ROM_RUN && HAVE_ACPI_RESUME
174 Execute VGA Option ROMs in coreboot when resuming from S3 suspend.
176 When using a SeaBIOS payload it runs all option ROMs with much
177 more complete BIOS interrupt services available than coreboot,
178 which some option ROMs require in order to function correctly.
180 If unsure, say N when using SeaBIOS as payload, Y otherwise.
182 config ALWAYS_LOAD_OPROM
184 depends on VGA_ROM_RUN
186 Always load option ROMs if any are found. The decision to run
187 the ROM is still determined at runtime, but the distinction
188 between loading and not running comes into play for CHROMEOS.
190 An example where this is required is that VBT (Video BIOS Tables)
191 are needed for the kernel's display driver to know how a piece of
192 hardware is configured to be used.
194 config ALWAYS_RUN_OPROM
196 depends on VGA_ROM_RUN && ALWAYS_LOAD_OPROM
198 Always unconditionally run the option regardless of other
201 config ON_DEVICE_ROM_LOAD
202 bool "Load Option ROMs on PCI devices"
203 default n if PAYLOAD_SEABIOS
204 default y if !PAYLOAD_SEABIOS
205 depends on VGA_ROM_RUN
207 Load Option ROMs stored on PCI/PCIe/AGP VGA devices in coreboot.
209 If disabled, only Option ROMs stored in CBFS will be executed by
210 coreboot. If you are concerned about security, you might want to
211 disable this option, but it might leave your system in a state of
212 degraded functionality.
214 When using a SeaBIOS payload it runs all option ROMs with much
215 more complete BIOS interrupt services available than coreboot,
216 which some option ROMs require in order to function correctly.
218 If unsure, say N when using SeaBIOS as payload, Y otherwise.
221 prompt "Option ROM execution type"
222 default PCI_OPTION_ROM_RUN_YABEL if !ARCH_X86
223 default PCI_OPTION_ROM_RUN_REALMODE if ARCH_X86
224 depends on VGA_ROM_RUN
226 config PCI_OPTION_ROM_RUN_REALMODE
229 depends on ARCH_X86 && !ARCH_RAMSTAGE_X86_64
231 If you select this option, PCI Option ROMs will be executed
232 natively on the CPU in real mode. No CPU emulation is involved,
233 so this is the fastest, but also the least secure option.
234 (only works on x86/x64 systems)
236 config PCI_OPTION_ROM_RUN_YABEL
240 If you select this option, the x86emu CPU emulator will be used to
241 execute PCI Option ROMs.
243 This option prevents Option ROMs from doing dirty tricks with the
244 system (such as installing SMM modules or hypervisors), but it is
245 also significantly slower than the native Option ROM initialization
248 This is the default choice for non-x86 systems.
252 config YABEL_PCI_ACCESS_OTHER_DEVICES
253 prompt "Allow Option ROMs to access other devices"
255 depends on PCI_OPTION_ROM_RUN_YABEL
257 Per default, YABEL only allows Option ROMs to access the PCI device
258 that they are associated with. However, this causes trouble for some
259 onboard graphics chips whose Option ROM needs to reconfigure the
262 config YABEL_PCI_FAKE_WRITING_OTHER_DEVICES_CONFIG
263 prompt "Fake success on writing other device's config space"
265 depends on YABEL_PCI_ACCESS_OTHER_DEVICES
267 By default, YABEL aborts when the Option ROM tries to write to other
268 devices' config spaces. With this option enabled, the write doesn't
269 follow through, but the Option ROM is allowed to go on.
270 This can create issues such as hanging Option ROMs (if it depends on
271 that other register changing to the written value), so test for
272 impact before using this option.
274 config YABEL_VIRTMEM_LOCATION
275 prompt "Location of YABEL's virtual memory"
277 depends on PCI_OPTION_ROM_RUN_YABEL
280 YABEL requires 1MB memory for its CPU emulation. This memory is
281 normally located at 16MB.
283 config YABEL_DIRECTHW
284 prompt "Direct hardware access"
286 depends on PCI_OPTION_ROM_RUN_YABEL && ARCH_X86
288 YABEL consists of two parts: It uses x86emu for the CPU emulation and
289 additionally provides a PC system emulation that filters bad device
290 and memory access (such as PCI config space access to other devices
291 than the initialized one).
293 When choosing this option, x86emu will pass through all hardware
294 accesses to memory and I/O devices to the underlying memory and I/O
295 addresses. While this option prevents Option ROMs from doing dirty
296 tricks with the CPU (such as installing SMM modules or hypervisors),
297 they can still access all devices in the system.
298 Enable this option for a good compromise between security and speed.
301 depends on HAVE_VGA_TEXT_FRAMEBUFFER || HAVE_LINEAR_FRAMEBUFFER
303 config FRAMEBUFFER_SET_VESA_MODE
304 prompt "Set framebuffer graphics resolution"
306 default y if CHROMEOS
307 depends on PCI_OPTION_ROM_RUN_YABEL || PCI_OPTION_ROM_RUN_REALMODE
308 select HAVE_VBE_LINEAR_FRAMEBUFFER
310 Set VESA/native framebuffer mode (needed for bootsplash and graphical framebuffer console)
312 if FRAMEBUFFER_SET_VESA_MODE
315 prompt "framebuffer graphics resolution"
316 default FRAMEBUFFER_VESA_MODE_118
318 This option sets the resolution used for the coreboot framebuffer (and
321 config FRAMEBUFFER_VESA_MODE_100
322 bool "640x400 256-color"
324 config FRAMEBUFFER_VESA_MODE_101
325 bool "640x480 256-color"
327 config FRAMEBUFFER_VESA_MODE_102
328 bool "800x600 16-color"
330 config FRAMEBUFFER_VESA_MODE_103
331 bool "800x600 256-color"
333 config FRAMEBUFFER_VESA_MODE_104
334 bool "1024x768 16-color"
336 config FRAMEBUFFER_VESA_MODE_105
337 bool "1024x768 256-color"
339 config FRAMEBUFFER_VESA_MODE_106
340 bool "1280x1024 16-color"
342 config FRAMEBUFFER_VESA_MODE_107
343 bool "1280x1024 256-color"
345 config FRAMEBUFFER_VESA_MODE_108
348 config FRAMEBUFFER_VESA_MODE_109
351 config FRAMEBUFFER_VESA_MODE_10A
354 config FRAMEBUFFER_VESA_MODE_10B
357 config FRAMEBUFFER_VESA_MODE_10C
360 config FRAMEBUFFER_VESA_MODE_10D
361 bool "320x200 32k-color (1:5:5:5)"
363 config FRAMEBUFFER_VESA_MODE_10E
364 bool "320x200 64k-color (5:6:5)"
366 config FRAMEBUFFER_VESA_MODE_10F
367 bool "320x200 16.8M-color (8:8:8)"
369 config FRAMEBUFFER_VESA_MODE_110
370 bool "640x480 32k-color (1:5:5:5)"
372 config FRAMEBUFFER_VESA_MODE_111
373 bool "640x480 64k-color (5:6:5)"
375 config FRAMEBUFFER_VESA_MODE_112
376 bool "640x480 16.8M-color (8:8:8)"
378 config FRAMEBUFFER_VESA_MODE_113
379 bool "800x600 32k-color (1:5:5:5)"
381 config FRAMEBUFFER_VESA_MODE_114
382 bool "800x600 64k-color (5:6:5)"
384 config FRAMEBUFFER_VESA_MODE_115
385 bool "800x600 16.8M-color (8:8:8)"
387 config FRAMEBUFFER_VESA_MODE_116
388 bool "1024x768 32k-color (1:5:5:5)"
390 config FRAMEBUFFER_VESA_MODE_117
391 bool "1024x768 64k-color (5:6:5)"
393 config FRAMEBUFFER_VESA_MODE_118
394 bool "1024x768 16.8M-color (8:8:8)"
396 config FRAMEBUFFER_VESA_MODE_119
397 bool "1280x1024 32k-color (1:5:5:5)"
399 config FRAMEBUFFER_VESA_MODE_11A
400 bool "1280x1024 64k-color (5:6:5)"
402 config FRAMEBUFFER_VESA_MODE_11B
403 bool "1280x1024 16.8M-color (8:8:8)"
405 config FRAMEBUFFER_VESA_MODE_USER
406 bool "Manually select VESA mode"
410 # Map the config names to an integer (KB).
411 config FRAMEBUFFER_VESA_MODE
412 prompt "VESA mode" if FRAMEBUFFER_VESA_MODE_USER
414 default 0x100 if FRAMEBUFFER_VESA_MODE_100
415 default 0x101 if FRAMEBUFFER_VESA_MODE_101
416 default 0x102 if FRAMEBUFFER_VESA_MODE_102
417 default 0x103 if FRAMEBUFFER_VESA_MODE_103
418 default 0x104 if FRAMEBUFFER_VESA_MODE_104
419 default 0x105 if FRAMEBUFFER_VESA_MODE_105
420 default 0x106 if FRAMEBUFFER_VESA_MODE_106
421 default 0x107 if FRAMEBUFFER_VESA_MODE_107
422 default 0x108 if FRAMEBUFFER_VESA_MODE_108
423 default 0x109 if FRAMEBUFFER_VESA_MODE_109
424 default 0x10A if FRAMEBUFFER_VESA_MODE_10A
425 default 0x10B if FRAMEBUFFER_VESA_MODE_10B
426 default 0x10C if FRAMEBUFFER_VESA_MODE_10C
427 default 0x10D if FRAMEBUFFER_VESA_MODE_10D
428 default 0x10E if FRAMEBUFFER_VESA_MODE_10E
429 default 0x10F if FRAMEBUFFER_VESA_MODE_10F
430 default 0x110 if FRAMEBUFFER_VESA_MODE_110
431 default 0x111 if FRAMEBUFFER_VESA_MODE_111
432 default 0x112 if FRAMEBUFFER_VESA_MODE_112
433 default 0x113 if FRAMEBUFFER_VESA_MODE_113
434 default 0x114 if FRAMEBUFFER_VESA_MODE_114
435 default 0x115 if FRAMEBUFFER_VESA_MODE_115
436 default 0x116 if FRAMEBUFFER_VESA_MODE_116
437 default 0x117 if FRAMEBUFFER_VESA_MODE_117
438 default 0x118 if FRAMEBUFFER_VESA_MODE_118
439 default 0x119 if FRAMEBUFFER_VESA_MODE_119
440 default 0x11A if FRAMEBUFFER_VESA_MODE_11A
441 default 0x11B if FRAMEBUFFER_VESA_MODE_11B
442 default 0x118 if FRAMEBUFFER_VESA_MODE_USER
443 endif # FRAMEBUFFER_SET_VESA_MODE
445 config WANT_LINEAR_FRAMEBUFFER
447 default y if CHROMEOS
448 default y if PAYLOAD_EDK2
449 default y if COREDOOM_SECONDARY_PAYLOAD
452 prompt "Framebuffer mode"
453 default VBE_LINEAR_FRAMEBUFFER if HAVE_VBE_LINEAR_FRAMEBUFFER && WANT_LINEAR_FRAMEBUFFER
454 default GENERIC_LINEAR_FRAMEBUFFER if HAVE_LINEAR_FRAMEBUFFER && WANT_LINEAR_FRAMEBUFFER
455 default VGA_TEXT_FRAMEBUFFER
457 config VGA_TEXT_FRAMEBUFFER
458 bool "Legacy VGA text mode"
459 depends on HAVE_VGA_TEXT_FRAMEBUFFER
461 If this option is enabled, coreboot will initialize graphics in
462 legacy VGA text mode or, if a VGA BIOS is used and a VESA mode set,
463 switch to text mode before handing control to a payload.
465 config VBE_LINEAR_FRAMEBUFFER
466 bool "VESA framebuffer"
467 depends on HAVE_VBE_LINEAR_FRAMEBUFFER
469 This option keeps the framebuffer mode set after coreboot finishes
470 execution. If this option is enabled, coreboot will pass a
471 framebuffer entry in its coreboot table and the payload will need a
474 config GENERIC_LINEAR_FRAMEBUFFER
475 bool "Linear \"high-resolution\" framebuffer"
476 depends on HAVE_LINEAR_FRAMEBUFFER
478 This option enables a high-resolution, linear framebuffer. If this
479 option is enabled, coreboot will pass a framebuffer entry in its
480 coreboot table and the payload will need a compatible driver.
484 # Workaround to have LINEAR_FRAMEBUFFER set in both cases
485 # VBE_LINEAR_FRAMEBUFFER and GENERIC_LINEAR_FRAMEBUFFER.
486 # `kconfig_lint` doesn't let us use the same name with
487 # different texts in the choice above.
488 config LINEAR_FRAMEBUFFER
490 depends on VBE_LINEAR_FRAMEBUFFER || GENERIC_LINEAR_FRAMEBUFFER
493 prompt "Show graphical bootsplash"
495 depends on LINEAR_FRAMEBUFFER
497 This option shows a graphical bootsplash screen. The graphics are
498 loaded from the CBFS file bootsplash.jpg.
500 You can either specify the location and file name of the
501 image in the 'General' section or add it manually to CBFS, using,
502 for example, cbfstool.
504 config LINEAR_FRAMEBUFFER_MAX_WIDTH
505 int "Maximum width in pixels"
506 depends on LINEAR_FRAMEBUFFER && MAINBOARD_USE_LIBGFXINIT
507 default 2560 if SYSTEM_TYPE_LAPTOP
510 Set the maximum width of the framebuffer. This may help with
511 default fonts too tiny for high-resolution displays.
513 config LINEAR_FRAMEBUFFER_MAX_HEIGHT
514 int "Maximum height in pixels"
515 depends on LINEAR_FRAMEBUFFER && MAINBOARD_USE_LIBGFXINIT
516 default 1600 if SYSTEM_TYPE_LAPTOP
519 Set the maximum height of the framebuffer. This may help with
520 default fonts too tiny for high-resolution displays.
522 choice DEFAULT_SCREEN_ROTATION
523 prompt "Default screen orientation"
524 depends on LINEAR_FRAMEBUFFER && MAINBOARD_USE_LIBGFXINIT
525 depends on GFX_GMA_GENERATION = "Broxton" || GFX_GMA_GENERATION = "Skylake"
526 default DEFAULT_SCREEN_ROTATION_NONE
528 This allows to configure how the physical screen is mounted in
529 90 degree steps (counter-clockwise). The framebuffer contents
530 will then be displayed rotated by the same amount in the other
531 direction; i.e. if you turn the screen to the left, the picture
532 has to be rotated to the right to accommodate.
534 config DEFAULT_SCREEN_ROTATION_NONE
537 config DEFAULT_SCREEN_ROTATION_90
538 bool "Rotated 90 degrees (rotate framebuffer to the right)"
540 config DEFAULT_SCREEN_ROTATION_180
541 bool "Rotated 180 degrees"
543 config DEFAULT_SCREEN_ROTATION_270
544 bool "Rotated 270 degrees (rotate framebuffer to the left)"
548 config DEFAULT_SCREEN_ROTATION_INT
550 default 90 if DEFAULT_SCREEN_ROTATION_90
551 default 180 if DEFAULT_SCREEN_ROTATION_180
552 default 270 if DEFAULT_SCREEN_ROTATION_270
564 The memory address of a memory-mapped translator that lets the
565 CPU communicate with peripheral devices over PCI I/O space.
569 config DOMAIN_RESOURCE_32BIT_LIMIT
573 When the default pci_domain_read_resources() is used,
574 keep 32-bit memory resources below this limit. This is
575 used as a workaround for missing/wrong reservations of
576 chipset resources that usually reside above this limit.
578 config NO_ECAM_MMCONF_SUPPORT
582 Disable the use of the Enhanced Configuration
583 Access mechanism (ECAM) method for accessing PCI config
586 config ECAM_MMCONF_SUPPORT
588 default !NO_ECAM_MMCONF_SUPPORT
590 Enable the use of the Enhanced Configuration
591 Access mechanism (ECAM) method for accessing PCI config
594 config PCIX_PLUGIN_SUPPORT
598 config CARDBUS_PLUGIN_SUPPORT
602 config AZALIA_HDA_CODEC_SUPPORT
606 Select this option to include the code to initialize Azalia HD audio
607 codec chips. This will also add the hda_verb.c file from the
608 mainboard directory to the build which contain the board-specific HD
609 audio codec configuration.
611 config PCIEXP_PLUGIN_SUPPORT
615 config ECAM_MMCONF_BASE_ADDRESS
617 depends on ECAM_MMCONF_SUPPORT
619 config ECAM_MMCONF_BUS_NUMBER
621 depends on ECAM_MMCONF_SUPPORT
623 Total number of PCI buses in the system across all segment groups.
624 The number needs to be a power of 2. For values <= 256,
625 PCI_BUSES_PER_SEGMENT_GROUP is CONFIG_ECAM_MMCONF_BUS_NUMBER and
626 PCI_SEGMENT_GROUP_COUNT is 1. For values > 256,
627 PCI_BUSES_PER_SEGMENT_GROUP is 256 and PCI_SEGMENT_GROUP_COUNT is
628 CONFIG_ECAM_MMCONF_BUS_NUMBER / 256.
630 config ECAM_MMCONF_LENGTH
632 depends on ECAM_MMCONF_SUPPORT
633 default 0x02000000 if ECAM_MMCONF_BUS_NUMBER = 32
634 default 0x04000000 if ECAM_MMCONF_BUS_NUMBER = 64
635 default 0x08000000 if ECAM_MMCONF_BUS_NUMBER = 128
636 default 0x10000000 if ECAM_MMCONF_BUS_NUMBER = 256
637 default 0x20000000 if ECAM_MMCONF_BUS_NUMBER = 512
638 default 0x80000000 if ECAM_MMCONF_BUS_NUMBER = 1024
641 config PCI_ALLOW_BUS_MASTER
642 bool "Allow coreboot to set optional PCI bus master bits"
645 For security reasons, bus mastering should be enabled as late as
646 possible. In coreboot, it's usually not necessary and payloads
647 should only enable it for devices they use. Since not all payloads
648 enable bus mastering properly yet, this option gives some sort of
649 "backwards compatibility" and is enabled by default to keep the
650 traditional behaviour for now. This is currently necessary, for
651 instance, for libpayload based payloads as the drivers don't enable
652 bus mastering for PCI bridges.
654 if PCI_ALLOW_BUS_MASTER
656 config PCI_SET_BUS_MASTER_PCI_BRIDGES
660 Let coreboot configure bus mastering for PCI bridges. Enabling bus
661 mastering for a PCI bridge also allows it to forward requests from
662 downstream devices. Currently, payloads ignore this and only enable
663 bus mastering for the downstream device. Hence, this option is needed
664 for compatibility until payloads are fixed.
666 config PCI_ALLOW_BUS_MASTER_ANY_DEVICE
669 select PCI_SET_BUS_MASTER_PCI_BRIDGES
671 Allow coreboot to enable PCI bus mastering for any device. The actual
672 selection of devices depends on the various PCI drivers in coreboot.
674 endif # PCI_ALLOW_BUS_MASTER
678 if PCIEXP_PLUGIN_SUPPORT
680 config PCIEXP_COMMON_CLOCK
681 prompt "Enable PCIe Common Clock"
685 Detect and enable Common Clock on PCIe links.
688 prompt "Enable PCIe ASPM"
692 Detect and enable ASPM (Active State Power Management) on PCIe links.
695 prompt "Enable PCIe Clock Power Management"
699 Detect and enable Clock Power Management on PCIe.
701 config PCIEXP_L1_SUB_STATE
702 prompt "Enable PCIe ASPM L1 SubState"
704 depends on (ECAM_MMCONF_SUPPORT || PCI_IO_CFG_EXT)
707 Detect and enable ASPM on PCIe links.
709 config PCIEXP_SUPPORT_RESIZABLE_BARS
710 prompt "Support PCIe Resizable BARs"
712 depends on (ECAM_MMCONF_SUPPORT || PCI_IO_CFG_EXT)
715 When enabled, this will check PCIe devices for Resizable BAR support,
716 and if found, will use this to discover the preferred BAR sizes of
717 the device in preference over the traditional moving bits method. The
718 amount of address space given out to devices in this manner (since
719 it can range up to 8 EB) can be limited with the
720 PCIEXP_DEFAULT_MAX_RESIZABLE_BAR_BITS Kconfig setting below.
722 if PCIEXP_SUPPORT_RESIZABLE_BARS
724 config PCIEXP_DEFAULT_MAX_RESIZABLE_BAR_BITS
725 int "Bits of address space to give to Resizable BARs"
726 range 20 63 # 1 MiB - 8 EiB
729 This is the maximum number of bits of address space to allocate for
730 PCIe devices with resizable BARs. For instance, if a device requests
731 30 bits of address space (1 GiB), but this field is set to 29, then
732 the device will only be allocated 29 bits worth of address space (512
733 MiB). Valid values range from 20 (1 MiB) to 63 (8 EiB); these come
734 from the Resizable BAR portion of the PCIe spec (7.8.6).
736 endif # PCIEXP_SUPPORT_RESIZABLE_BARS
738 config PCIEXP_LANE_ERR_STAT_CLEAR
739 prompt "Enable Clear PCIe Lane Error Status"
743 Clear the PCIe Lane Error Status at the end of link training.
745 config PCIEXP_HOTPLUG
746 prompt "Enable PCIe Hotplug Support"
750 Allocate resources for PCIe hotplug bridges
754 config PCIEXP_HOTPLUG_BUSES
755 int "PCI Express Hotplug Buses"
758 This is the number of buses allocated for hotplug PCI express
759 bridges, for use by hotplugged child devices. The default is 8
762 config PCIEXP_HOTPLUG_MEM
763 hex "PCI Express Hotplug Memory"
766 This is the amount of memory space, in bytes, to allocate to
767 hotplug PCI express bridges, for use by hotplugged child devices.
768 This size should be page-aligned. The default is 8 MiB.
770 config PCIEXP_HOTPLUG_PREFETCH_MEM
771 hex "PCI Express Hotplug Prefetch Memory"
774 This is the amount of pre-fetchable memory space, in bytes, to
775 allocate to hot-plug PCI express bridges, for use by hotplugged
776 child devices. This size should be page-aligned. The default is
779 config PCIEXP_HOTPLUG_PREFETCH_MEM_ABOVE_4G
781 default y if !PCIEXP_HOTPLUG_PREFETCH_MEM_BELOW_4G
784 This enables prefetch memory allocation above 4G boundary for the
787 config PCIEXP_HOTPLUG_PREFETCH_MEM_BELOW_4G
788 bool "PCI Express Hotplug Prefetch Memory Allocation below 4G boundary"
791 This enables prefetch memory allocation below 4G boundary for the
794 config PCIEXP_HOTPLUG_IO
795 hex "PCI Express Hotplug I/O Space"
798 This is the amount of I/O space to allocate to hot-plug PCI
799 express bridges, for use by hotplugged child devices. The default
802 endif # PCIEXP_HOTPLUG
804 endif # PCIEXP_PLUGIN_SUPPORT
806 config EARLY_PCI_BRIDGE
807 bool "Early PCI bridge"
811 While coreboot is executing code from ROM, the coreboot resource
812 allocator has not been running yet. Hence PCI devices living behind
813 a bridge are not yet visible to the system.
815 This option enables static configuration for a single pre-defined
816 PCI bridge function on bus 0.
820 config EARLY_PCI_BRIDGE_DEVICE
824 config EARLY_PCI_BRIDGE_FUNCTION
825 hex "bridge function"
828 config EARLY_PCI_MMIO_BASE
829 hex "MMIO window base"
832 endif # EARLY_PCI_BRIDGE
834 config SUBSYSTEM_VENDOR_ID
835 hex "Override PCI Subsystem Vendor ID"
839 This config option will override the devicetree settings for
840 PCI Subsystem Vendor ID.
842 Note: This option is not meant for a board's Kconfig; use the
843 devicetree setting `subsystemid` instead.
845 config SUBSYSTEM_DEVICE_ID
846 hex "Override PCI Subsystem Device ID"
850 This config option will override the devicetree settings for
851 PCI Subsystem Device ID.
853 Note: This option is not meant for a board's Kconfig; use the
854 devicetree setting `subsystemid` instead.
857 bool "Add a VGA BIOS image"
859 select VGA_ROM_RUN_DEFAULT
861 Select this option if you have a VGA BIOS image that you would
862 like to add to your ROM.
864 You will be able to specify the location and file name of the
868 string "VGA BIOS path and filename"
870 default "vgabios.bin"
872 The path and filename of the file to use as VGA BIOS.
875 string "VGA device PCI IDs"
879 The comma-separated PCI vendor and device ID that would associate
880 your vBIOS to your video card.
884 In the above example 1106 is the PCI vendor ID (in hex, but without
885 the "0x" prefix) and 3230 specifies the PCI device ID of the
886 video card (also in hex, without "0x" prefix).
888 This ID needs to match the PCI VID and DID in the VGA BIOS file's
889 header and also needs to match the value returned by map_oprom_vendev
890 if the remapping feature is used.
892 Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
894 config VGA_BIOS_SECOND
895 bool "Add a 2nd video BIOS image"
896 depends on ARCH_X86 && VGA_BIOS
898 Select this option if you have a 2nd video BIOS image that you would
899 like to add to your ROM.
901 config VGA_BIOS_SECOND_FILE
902 string "2nd video BIOS path and filename"
903 depends on VGA_BIOS_SECOND
906 The path and filename of the file to use as video BIOS.
908 config VGA_BIOS_SECOND_ID
909 string "Graphics device PCI IDs"
910 depends on VGA_BIOS_SECOND
912 The comma-separated PCI vendor and device ID that would associate
913 your vBIOS to your video card.
917 In the above example 1106 is the PCI vendor ID (in hex, but without
918 the "0x" prefix) and 3230 specifies the PCI device ID of the
919 video card (also in hex, without "0x" prefix).
921 Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
924 bool "Add a discrete VGA BIOS image"
927 Select this option if you have a VGA BIOS image for discrete GPU
928 that you would like to add to your ROM.
930 You will be able to specify the location and file name of the
933 config VGA_BIOS_DGPU_FILE
934 string "Discrete VGA BIOS path and filename"
935 depends on VGA_BIOS_DGPU
936 default "vgabios_dgpu.bin"
938 The path and filename of the file to use as VGA BIOS for discrete GPU.
940 config VGA_BIOS_DGPU_ID
941 string "Discrete VGA device PCI IDs"
942 depends on VGA_BIOS_DGPU
945 The comma-separated PCI vendor and device ID that would associate
946 your VGA BIOS to your discrete video card.
949 1002,6663 for HD 8570M
950 1002,6665 for R5 M230
952 In the above examples 1002 is the PCI vendor ID (in hex, but without
953 the "0x" prefix) and 6663 / 6665 specifies the PCI device ID of the
954 discrete video card (also in hex, without "0x" prefix).
956 Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
958 config INTEL_GMA_HAVE_VBT
961 Select this in the mainboard Kconfig to indicate the board has
964 config INTEL_GMA_ADD_VBT
965 depends on SOC_INTEL_COMMON || CPU_INTEL_COMMON
966 bool "Add a Video BIOS Table (VBT) binary to CBFS"
967 default y if INTEL_GMA_HAVE_VBT
969 Add a VBT data file to CBFS. The VBT describes the integrated
970 GPU and connections, and is needed by the GOP driver integrated into
971 FSP and the OS driver in order to initialize the display.
973 config INTEL_GMA_VBT_FILE
974 string "VBT binary path and filename"
975 depends on INTEL_GMA_ADD_VBT
976 default "src/mainboard/\$(MAINBOARDDIR)/variants/\$(VARIANT_DIR)/data.vbt" \
977 if INTEL_GMA_HAVE_VBT && VARIANT_DIR != ""
978 default "src/mainboard/\$(MAINBOARDDIR)/data.vbt" if INTEL_GMA_HAVE_VBT
979 default "3rdparty/blobs/mainboard/\$(MAINBOARDDIR)/vbt.bin"
981 The path and filename of the VBT binary.
984 bool "Enable I2C controller emulation in software"
987 This config option will enable code to override the i2c_transfer
988 routine with a (simple) software emulation of the protocol. This may
989 be useful for debugging or on platforms where a driver for the real
990 I2C controller is not (yet) available. The platform code needs to
991 provide bindings to manually toggle I2C lines.
993 config I2C_TRANSFER_TIMEOUT_US
994 int "I2C transfer timeout in microseconds"
997 Timeout for a read/write transfers on the I2C bus, that is, the
998 maximum time a device could stretch clock bits before the transfer
999 is aborted and an error returned.
1001 config RESOURCE_ALLOCATION_TOP_DOWN
1002 bool "Allocate resources from top down"
1003 default n if PAYLOAD_EDK2
1006 Top-down allocation is required to place resources above 4G by
1007 default (i.e. even when there is still space below). On some
1008 platforms, it might make a difference because of conflicts with
1009 undeclared resources. EDK2 is currently reported to also have
1010 problems on some platforms, at least with Intel's IGD.
1012 config ALWAYS_ALLOW_ABOVE_4G_ALLOCATION
1014 default n if ARCH_X86
1017 Don't limit mem resources to 4G, but to their actual limit.
1022 Provides xHCI utility functions.
1024 config D3COLD_SUPPORT
1028 Enable this option if all devices on your system support the
1029 D3Cold power management state. The D3Cold state is a low-power
1030 state where the device has been powered down and is no longer
1031 able to maintain its context. This state can help reduce
1032 overall system power consumption, which can be beneficial for
1033 energy savings and thermal management.
1035 Please note that enabling D3Cold support may break system
1036 suspend-to-RAM (S3) functionality.
1038 source "src/device/dram/Kconfig"