1 ## SPDX-License-Identifier: GPL-2.0-only
5 config HAVE_VGA_TEXT_FRAMEBUFFER
7 depends on !NO_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.
62 prompt "Graphics initialization"
63 default NO_GFX_INIT if VGA_ROM_RUN_DEFAULT && PAYLOAD_SEABIOS
64 default VGA_ROM_RUN if VGA_ROM_RUN_DEFAULT
65 default MAINBOARD_DO_NATIVE_VGA_INIT
66 default MAINBOARD_USE_LIBGFXINIT
67 default RUN_FSP_GOP if INTEL_GMA_HAVE_VBT
69 config MAINBOARD_DO_NATIVE_VGA_INIT
70 bool "Use native graphics init"
71 depends on MAINBOARD_HAS_NATIVE_VGA_INIT
73 Some mainboards, such as the Google Link, allow initializing the
74 display without the need of a binary only VGA OPROM. Enabling this
75 option may be faster, but also lacks flexibility in setting modes.
77 config MAINBOARD_USE_LIBGFXINIT
79 depends on MAINBOARD_HAS_LIBGFXINIT
80 select HAVE_VGA_TEXT_FRAMEBUFFER
81 select HAVE_LINEAR_FRAMEBUFFER
82 select VGA if VGA_TEXT_FRAMEBUFFER
84 Use the SPARK library `libgfxinit` for the native graphics
85 initialization. This requires an Ada toolchain.
87 # TODO: Explain differences (if any) for onboard cards.
89 bool "Run VGA Option ROMs"
90 depends on PCI && (ARCH_X86 || ARCH_PPC64) && !MAINBOARD_FORCE_NATIVE_VGA_INIT
91 select HAVE_VGA_TEXT_FRAMEBUFFER
93 Execute VGA Option ROMs in coreboot if found. This can be used
94 to enable PCI/AGP/PCI-E video cards when not using a SeaBIOS
97 When using a SeaBIOS payload it runs all option ROMs with much
98 more complete BIOS interrupt services available than coreboot,
99 which some option ROMs require in order to function correctly.
102 bool "Run a GOP driver"
103 depends on HAVE_FSP_GOP && !MAINBOARD_NO_FSP_GOP
104 select HAVE_LINEAR_FRAMEBUFFER
106 Some platforms (e.g. Intel Braswell and Skylake/Kaby Lake) support
107 to run a GOP blob. This option enables graphics initialization with
112 depends on !MAINBOARD_FORCE_NATIVE_VGA_INIT
114 Select this to not perform any graphics initialization in
115 coreboot. This is useful if the payload (e.g. SeaBIOS) can
116 initialize graphics or if pre-boot graphics are not required.
120 config PRE_GRAPHICS_DELAY_MS
121 int "Graphics initialization delay in ms"
123 depends on VGA_ROM_RUN
125 On some systems, coreboot boots so fast that connected monitors
126 (mostly TVs) won't be able to wake up fast enough to talk to the
127 VBIOS. On those systems we need to wait for a bit before executing
130 config ONBOARD_VGA_IS_PRIMARY
131 bool "Use onboard VGA as primary video device"
135 This option lets you select which VGA device will be used
136 to decode legacy VGA cycles. Not all chipsets implement this
137 however. If not selected, the last adapter found will be used,
138 else the onboard adapter is used.
140 config S3_VGA_ROM_RUN
141 bool "Re-run VGA Option ROMs on S3 resume"
143 depends on VGA_ROM_RUN && HAVE_ACPI_RESUME
145 Execute VGA Option ROMs in coreboot when resuming from S3 suspend.
147 When using a SeaBIOS payload it runs all option ROMs with much
148 more complete BIOS interrupt services available than coreboot,
149 which some option ROMs require in order to function correctly.
151 If unsure, say N when using SeaBIOS as payload, Y otherwise.
153 config ALWAYS_LOAD_OPROM
155 depends on VGA_ROM_RUN
157 Always load option ROMs if any are found. The decision to run
158 the ROM is still determined at runtime, but the distinction
159 between loading and not running comes into play for CHROMEOS.
161 An example where this is required is that VBT (Video BIOS Tables)
162 are needed for the kernel's display driver to know how a piece of
163 hardware is configured to be used.
165 config ALWAYS_RUN_OPROM
167 depends on VGA_ROM_RUN && ALWAYS_LOAD_OPROM
169 Always unconditionally run the option regardless of other
172 config ON_DEVICE_ROM_LOAD
173 bool "Load Option ROMs on PCI devices"
174 default n if PAYLOAD_SEABIOS
175 default y if !PAYLOAD_SEABIOS
176 depends on VGA_ROM_RUN
178 Load Option ROMs stored on PCI/PCIe/AGP VGA devices in coreboot.
180 If disabled, only Option ROMs stored in CBFS will be executed by
181 coreboot. If you are concerned about security, you might want to
182 disable this option, but it might leave your system in a state of
183 degraded functionality.
185 When using a SeaBIOS payload it runs all option ROMs with much
186 more complete BIOS interrupt services available than coreboot,
187 which some option ROMs require in order to function correctly.
189 If unsure, say N when using SeaBIOS as payload, Y otherwise.
192 prompt "Option ROM execution type"
193 default PCI_OPTION_ROM_RUN_YABEL if !ARCH_X86
194 default PCI_OPTION_ROM_RUN_REALMODE if ARCH_X86
195 depends on VGA_ROM_RUN
197 config PCI_OPTION_ROM_RUN_REALMODE
202 If you select this option, PCI Option ROMs will be executed
203 natively on the CPU in real mode. No CPU emulation is involved,
204 so this is the fastest, but also the least secure option.
205 (only works on x86/x64 systems)
207 config PCI_OPTION_ROM_RUN_YABEL
211 If you select this option, the x86emu CPU emulator will be used to
212 execute PCI Option ROMs.
214 This option prevents Option ROMs from doing dirty tricks with the
215 system (such as installing SMM modules or hypervisors), but it is
216 also significantly slower than the native Option ROM initialization
219 This is the default choice for non-x86 systems.
223 config YABEL_PCI_ACCESS_OTHER_DEVICES
224 prompt "Allow Option ROMs to access other devices"
226 depends on PCI_OPTION_ROM_RUN_YABEL
228 Per default, YABEL only allows Option ROMs to access the PCI device
229 that they are associated with. However, this causes trouble for some
230 onboard graphics chips whose Option ROM needs to reconfigure the
233 config YABEL_PCI_FAKE_WRITING_OTHER_DEVICES_CONFIG
234 prompt "Fake success on writing other device's config space"
236 depends on YABEL_PCI_ACCESS_OTHER_DEVICES
238 By default, YABEL aborts when the Option ROM tries to write to other
239 devices' config spaces. With this option enabled, the write doesn't
240 follow through, but the Option ROM is allowed to go on.
241 This can create issues such as hanging Option ROMs (if it depends on
242 that other register changing to the written value), so test for
243 impact before using this option.
245 config YABEL_VIRTMEM_LOCATION
246 prompt "Location of YABEL's virtual memory"
248 depends on PCI_OPTION_ROM_RUN_YABEL
251 YABEL requires 1MB memory for its CPU emulation. This memory is
252 normally located at 16MB.
254 config YABEL_DIRECTHW
255 prompt "Direct hardware access"
257 depends on PCI_OPTION_ROM_RUN_YABEL && ARCH_X86
259 YABEL consists of two parts: It uses x86emu for the CPU emulation and
260 additionally provides a PC system emulation that filters bad device
261 and memory access (such as PCI config space access to other devices
262 than the initialized one).
264 When choosing this option, x86emu will pass through all hardware
265 accesses to memory and I/O devices to the underlying memory and I/O
266 addresses. While this option prevents Option ROMs from doing dirty
267 tricks with the CPU (such as installing SMM modules or hypervisors),
268 they can still access all devices in the system.
269 Enable this option for a good compromise between security and speed.
271 config MULTIPLE_VGA_ADAPTERS
276 depends on HAVE_VGA_TEXT_FRAMEBUFFER || HAVE_LINEAR_FRAMEBUFFER
278 config FRAMEBUFFER_SET_VESA_MODE
279 prompt "Set framebuffer graphics resolution"
281 default y if CHROMEOS
282 depends on PCI_OPTION_ROM_RUN_YABEL || PCI_OPTION_ROM_RUN_REALMODE
283 select HAVE_VBE_LINEAR_FRAMEBUFFER
285 Set VESA/native framebuffer mode (needed for bootsplash and graphical framebuffer console)
287 if FRAMEBUFFER_SET_VESA_MODE
290 prompt "framebuffer graphics resolution"
291 default FRAMEBUFFER_VESA_MODE_118
293 This option sets the resolution used for the coreboot framebuffer (and
296 config FRAMEBUFFER_VESA_MODE_100
297 bool "640x400 256-color"
299 config FRAMEBUFFER_VESA_MODE_101
300 bool "640x480 256-color"
302 config FRAMEBUFFER_VESA_MODE_102
303 bool "800x600 16-color"
305 config FRAMEBUFFER_VESA_MODE_103
306 bool "800x600 256-color"
308 config FRAMEBUFFER_VESA_MODE_104
309 bool "1024x768 16-color"
311 config FRAMEBUFFER_VESA_MODE_105
312 bool "1024x768 256-color"
314 config FRAMEBUFFER_VESA_MODE_106
315 bool "1280x1024 16-color"
317 config FRAMEBUFFER_VESA_MODE_107
318 bool "1280x1024 256-color"
320 config FRAMEBUFFER_VESA_MODE_108
323 config FRAMEBUFFER_VESA_MODE_109
326 config FRAMEBUFFER_VESA_MODE_10A
329 config FRAMEBUFFER_VESA_MODE_10B
332 config FRAMEBUFFER_VESA_MODE_10C
335 config FRAMEBUFFER_VESA_MODE_10D
336 bool "320x200 32k-color (1:5:5:5)"
338 config FRAMEBUFFER_VESA_MODE_10E
339 bool "320x200 64k-color (5:6:5)"
341 config FRAMEBUFFER_VESA_MODE_10F
342 bool "320x200 16.8M-color (8:8:8)"
344 config FRAMEBUFFER_VESA_MODE_110
345 bool "640x480 32k-color (1:5:5:5)"
347 config FRAMEBUFFER_VESA_MODE_111
348 bool "640x480 64k-color (5:6:5)"
350 config FRAMEBUFFER_VESA_MODE_112
351 bool "640x480 16.8M-color (8:8:8)"
353 config FRAMEBUFFER_VESA_MODE_113
354 bool "800x600 32k-color (1:5:5:5)"
356 config FRAMEBUFFER_VESA_MODE_114
357 bool "800x600 64k-color (5:6:5)"
359 config FRAMEBUFFER_VESA_MODE_115
360 bool "800x600 16.8M-color (8:8:8)"
362 config FRAMEBUFFER_VESA_MODE_116
363 bool "1024x768 32k-color (1:5:5:5)"
365 config FRAMEBUFFER_VESA_MODE_117
366 bool "1024x768 64k-color (5:6:5)"
368 config FRAMEBUFFER_VESA_MODE_118
369 bool "1024x768 16.8M-color (8:8:8)"
371 config FRAMEBUFFER_VESA_MODE_119
372 bool "1280x1024 32k-color (1:5:5:5)"
374 config FRAMEBUFFER_VESA_MODE_11A
375 bool "1280x1024 64k-color (5:6:5)"
377 config FRAMEBUFFER_VESA_MODE_11B
378 bool "1280x1024 16.8M-color (8:8:8)"
380 config FRAMEBUFFER_VESA_MODE_USER
381 bool "Manually select VESA mode"
385 # Map the config names to an integer (KB).
386 config FRAMEBUFFER_VESA_MODE
387 prompt "VESA mode" if FRAMEBUFFER_VESA_MODE_USER
389 default 0x100 if FRAMEBUFFER_VESA_MODE_100
390 default 0x101 if FRAMEBUFFER_VESA_MODE_101
391 default 0x102 if FRAMEBUFFER_VESA_MODE_102
392 default 0x103 if FRAMEBUFFER_VESA_MODE_103
393 default 0x104 if FRAMEBUFFER_VESA_MODE_104
394 default 0x105 if FRAMEBUFFER_VESA_MODE_105
395 default 0x106 if FRAMEBUFFER_VESA_MODE_106
396 default 0x107 if FRAMEBUFFER_VESA_MODE_107
397 default 0x108 if FRAMEBUFFER_VESA_MODE_108
398 default 0x109 if FRAMEBUFFER_VESA_MODE_109
399 default 0x10A if FRAMEBUFFER_VESA_MODE_10A
400 default 0x10B if FRAMEBUFFER_VESA_MODE_10B
401 default 0x10C if FRAMEBUFFER_VESA_MODE_10C
402 default 0x10D if FRAMEBUFFER_VESA_MODE_10D
403 default 0x10E if FRAMEBUFFER_VESA_MODE_10E
404 default 0x10F if FRAMEBUFFER_VESA_MODE_10F
405 default 0x110 if FRAMEBUFFER_VESA_MODE_110
406 default 0x111 if FRAMEBUFFER_VESA_MODE_111
407 default 0x112 if FRAMEBUFFER_VESA_MODE_112
408 default 0x113 if FRAMEBUFFER_VESA_MODE_113
409 default 0x114 if FRAMEBUFFER_VESA_MODE_114
410 default 0x115 if FRAMEBUFFER_VESA_MODE_115
411 default 0x116 if FRAMEBUFFER_VESA_MODE_116
412 default 0x117 if FRAMEBUFFER_VESA_MODE_117
413 default 0x118 if FRAMEBUFFER_VESA_MODE_118
414 default 0x119 if FRAMEBUFFER_VESA_MODE_119
415 default 0x11A if FRAMEBUFFER_VESA_MODE_11A
416 default 0x11B if FRAMEBUFFER_VESA_MODE_11B
417 default 0x118 if FRAMEBUFFER_VESA_MODE_USER
418 endif # FRAMEBUFFER_SET_VESA_MODE
420 config WANT_LINEAR_FRAMEBUFFER
422 default y if CHROMEOS
423 default y if PAYLOAD_EDK2
424 default y if COREDOOM_SECONDARY_PAYLOAD
427 prompt "Framebuffer mode"
428 default VBE_LINEAR_FRAMEBUFFER if HAVE_VBE_LINEAR_FRAMEBUFFER && WANT_LINEAR_FRAMEBUFFER
429 default GENERIC_LINEAR_FRAMEBUFFER if HAVE_LINEAR_FRAMEBUFFER && WANT_LINEAR_FRAMEBUFFER
430 default VGA_TEXT_FRAMEBUFFER
432 config VGA_TEXT_FRAMEBUFFER
433 bool "Legacy VGA text mode"
434 depends on HAVE_VGA_TEXT_FRAMEBUFFER
436 If this option is enabled, coreboot will initialize graphics in
437 legacy VGA text mode or, if a VGA BIOS is used and a VESA mode set,
438 switch to text mode before handing control to a payload.
440 config VBE_LINEAR_FRAMEBUFFER
441 bool "VESA framebuffer"
442 depends on HAVE_VBE_LINEAR_FRAMEBUFFER
444 This option keeps the framebuffer mode set after coreboot finishes
445 execution. If this option is enabled, coreboot will pass a
446 framebuffer entry in its coreboot table and the payload will need a
449 config GENERIC_LINEAR_FRAMEBUFFER
450 bool "Linear \"high-resolution\" framebuffer"
451 depends on HAVE_LINEAR_FRAMEBUFFER
453 This option enables a high-resolution, linear framebuffer. If this
454 option is enabled, coreboot will pass a framebuffer entry in its
455 coreboot table and the payload will need a compatible driver.
459 # Workaround to have LINEAR_FRAMEBUFFER set in both cases
460 # VBE_LINEAR_FRAMEBUFFER and GENERIC_LINEAR_FRAMEBUFFER.
461 # `kconfig_lint` doesn't let us use the same name with
462 # different texts in the choice above.
463 config LINEAR_FRAMEBUFFER
465 depends on VBE_LINEAR_FRAMEBUFFER || GENERIC_LINEAR_FRAMEBUFFER
468 prompt "Show graphical bootsplash"
470 depends on LINEAR_FRAMEBUFFER
472 This option shows a graphical bootsplash screen. The graphics are
473 loaded from the CBFS file bootsplash.jpg.
475 You can either specify the location and file name of the
476 image in the 'General' section or add it manually to CBFS, using,
477 for example, cbfstool.
479 config LINEAR_FRAMEBUFFER_MAX_WIDTH
480 int "Maximum width in pixels"
481 depends on LINEAR_FRAMEBUFFER && MAINBOARD_USE_LIBGFXINIT
484 Set the maximum width of the framebuffer. This may help with
485 default fonts too tiny for high-resolution displays.
487 config LINEAR_FRAMEBUFFER_MAX_HEIGHT
488 int "Maximum height in pixels"
489 depends on LINEAR_FRAMEBUFFER && MAINBOARD_USE_LIBGFXINIT
492 Set the maximum height of the framebuffer. This may help with
493 default fonts too tiny for high-resolution displays.
503 config NO_ECAM_MMCONF_SUPPORT
507 Disable the use of the Enhanced Configuration
508 Access mechanism (ECAM) method for accessing PCI config
511 config ECAM_MMCONF_SUPPORT
513 default !NO_ECAM_MMCONF_SUPPORT
515 Enable the use of the Enhanced Configuration
516 Access mechanism (ECAM) method for accessing PCI config
519 config PCIX_PLUGIN_SUPPORT
523 config CARDBUS_PLUGIN_SUPPORT
527 config AZALIA_PLUGIN_SUPPORT
531 config AZALIA_LOCK_DOWN_R_WO_GCAP
533 depends on AZALIA_PLUGIN_SUPPORT
535 The GCAP register is implemented as R/WO (Read / Write Once) on some
536 HD Audio controllers, such as Intel 6-series PCHs. Select this option
537 to lock down the GCAP register after deasserting the controller reset
538 bit. Locking is done by reading GCAP and writing back the read value.
540 config PCIEXP_PLUGIN_SUPPORT
544 config ECAM_MMCONF_BASE_ADDRESS
546 depends on ECAM_MMCONF_SUPPORT
548 config ECAM_MMCONF_BUS_NUMBER
550 depends on ECAM_MMCONF_SUPPORT
552 config ECAM_MMCONF_LENGTH
554 depends on ECAM_MMCONF_SUPPORT
555 default 0x04000000 if ECAM_MMCONF_BUS_NUMBER = 64
556 default 0x08000000 if ECAM_MMCONF_BUS_NUMBER = 128
557 default 0x10000000 if ECAM_MMCONF_BUS_NUMBER = 256
560 config PCI_ALLOW_BUS_MASTER
561 bool "Allow coreboot to set optional PCI bus master bits"
564 For security reasons, bus mastering should be enabled as late as
565 possible. In coreboot, it's usually not necessary and payloads
566 should only enable it for devices they use. Since not all payloads
567 enable bus mastering properly yet, this option gives some sort of
568 "backwards compatibility" and is enabled by default to keep the
569 traditional behaviour for now. This is currently necessary, for
570 instance, for libpayload based payloads as the drivers don't enable
571 bus mastering for PCI bridges.
573 if PCI_ALLOW_BUS_MASTER
575 config PCI_SET_BUS_MASTER_PCI_BRIDGES
579 Let coreboot configure bus mastering for PCI bridges. Enabling bus
580 mastering for a PCI bridge also allows it to forward requests from
581 downstream devices. Currently, payloads ignore this and only enable
582 bus mastering for the downstream device. Hence, this option is needed
583 for compatibility until payloads are fixed.
585 config PCI_ALLOW_BUS_MASTER_ANY_DEVICE
588 select PCI_SET_BUS_MASTER_PCI_BRIDGES
590 Allow coreboot to enable PCI bus mastering for any device. The actual
591 selection of devices depends on the various PCI drivers in coreboot.
593 endif # PCI_ALLOW_BUS_MASTER
597 if PCIEXP_PLUGIN_SUPPORT
599 config PCIEXP_COMMON_CLOCK
600 prompt "Enable PCIe Common Clock"
604 Detect and enable Common Clock on PCIe links.
607 prompt "Enable PCIe ASPM"
611 Detect and enable ASPM (Active State Power Management) on PCIe links.
614 prompt "Enable PCIe Clock Power Management"
618 Detect and enable Clock Power Management on PCIe.
620 config PCIEXP_L1_SUB_STATE
621 prompt "Enable PCIe ASPM L1 SubState"
623 depends on (ECAM_MMCONF_SUPPORT || PCI_IO_CFG_EXT)
626 Detect and enable ASPM on PCIe links.
628 config PCIEXP_SUPPORT_RESIZABLE_BARS
629 prompt "Support PCIe Resizable BARs"
631 depends on (ECAM_MMCONF_SUPPORT || PCI_IO_CFG_EXT)
634 When enabled, this will check PCIe devices for Resizable BAR support,
635 and if found, will use this to discover the preferred BAR sizes of
636 the device in preference over the traditional moving bits method. The
637 amount of address space given out to devices in this manner (since
638 it can range up to 8 EB) can be limited with the
639 PCIEXP_DEFAULT_MAX_RESIZABLE_BAR_BITS Kconfig setting below.
641 if PCIEXP_SUPPORT_RESIZABLE_BARS
643 config PCIEXP_DEFAULT_MAX_RESIZABLE_BAR_BITS
644 int "Bits of address space to give to Resizable BARs"
645 range 20 63 # 1 MiB - 8 EiB
648 This is the maximum number of bits of address space to allocate for
649 PCIe devices with resizable BARs. For instance, if a device requests
650 30 bits of address space (1 GiB), but this field is set to 29, then
651 the device will only be allocated 29 bits worth of address space (512
652 MiB). Valid values range from 20 (1 MiB) to 63 (8 EiB); these come
653 from the Resizable BAR portion of the PCIe spec (7.8.6).
655 endif # PCIEXP_SUPPORT_RESIZABLE_BARS
657 config PCIEXP_LANE_ERR_STAT_CLEAR
658 prompt "Enable Clear PCIe Lane Error Status"
662 Clear the PCIe Lane Error Status at the end of link training.
664 config PCIEXP_HOTPLUG
665 prompt "Enable PCIe Hotplug Support"
669 Allocate resources for PCIe hotplug bridges
673 config PCIEXP_HOTPLUG_BUSES
674 int "PCI Express Hotplug Buses"
675 default 8 if ECAM_MMCONF_SUPPORT && ECAM_MMCONF_BUS_NUMBER <= 64
676 default 16 if ECAM_MMCONF_SUPPORT && ECAM_MMCONF_BUS_NUMBER <= 128
679 This is the number of buses allocated for hotplug PCI express
680 bridges, for use by hotplugged child devices. The default is 32
683 config PCIEXP_HOTPLUG_MEM
684 hex "PCI Express Hotplug Memory"
687 This is the amount of memory space, in bytes, to allocate to
688 hotplug PCI express bridges, for use by hotplugged child devices.
689 This size should be page-aligned. The default is 8 MiB.
691 config PCIEXP_HOTPLUG_PREFETCH_MEM
692 hex "PCI Express Hotplug Prefetch Memory"
695 This is the amount of pre-fetchable memory space, in bytes, to
696 allocate to hot-plug PCI express bridges, for use by hotplugged
697 child devices. This size should be page-aligned. The default is
700 config PCIEXP_HOTPLUG_PREFETCH_MEM_ABOVE_4G
702 depends on RESOURCE_ALLOCATOR_V4
703 default y if !PCIEXP_HOTPLUG_PREFETCH_MEM_BELOW_4G
706 This enables prefetch memory allocation above 4G boundary for the
709 config PCIEXP_HOTPLUG_PREFETCH_MEM_BELOW_4G
710 bool "PCI Express Hotplug Prefetch Memory Allocation below 4G boundary"
713 This enables prefetch memory allocation below 4G boundary for the
716 config PCIEXP_HOTPLUG_IO
717 hex "PCI Express Hotplug I/O Space"
720 This is the amount of I/O space to allocate to hot-plug PCI
721 express bridges, for use by hotplugged child devices. The default
724 endif # PCIEXP_HOTPLUG
726 endif # PCIEXP_PLUGIN_SUPPORT
728 config EARLY_PCI_BRIDGE
729 bool "Early PCI bridge"
733 While coreboot is executing code from ROM, the coreboot resource
734 allocator has not been running yet. Hence PCI devices living behind
735 a bridge are not yet visible to the system.
737 This option enables static configuration for a single pre-defined
738 PCI bridge function on bus 0.
742 config EARLY_PCI_BRIDGE_DEVICE
746 config EARLY_PCI_BRIDGE_FUNCTION
747 hex "bridge function"
750 config EARLY_PCI_MMIO_BASE
751 hex "MMIO window base"
754 endif # EARLY_PCI_BRIDGE
756 config SUBSYSTEM_VENDOR_ID
757 hex "Override PCI Subsystem Vendor ID"
761 This config option will override the devicetree settings for
762 PCI Subsystem Vendor ID.
764 Note: This option is not meant for a board's Kconfig; use the
765 devicetree setting `subsystemid` instead.
767 config SUBSYSTEM_DEVICE_ID
768 hex "Override PCI Subsystem Device ID"
772 This config option will override the devicetree settings for
773 PCI Subsystem Device ID.
775 Note: This option is not meant for a board's Kconfig; use the
776 devicetree setting `subsystemid` instead.
779 bool "Add a VGA BIOS image"
781 select VGA_ROM_RUN_DEFAULT
783 Select this option if you have a VGA BIOS image that you would
784 like to add to your ROM.
786 You will be able to specify the location and file name of the
790 string "VGA BIOS path and filename"
792 default "vgabios.bin"
794 The path and filename of the file to use as VGA BIOS.
797 string "VGA device PCI IDs"
801 The comma-separated PCI vendor and device ID with optional revision if that
802 feature is enabled that would associate your vBIOS to your video card.
804 Example: 1106,3230 or 1106,3230,a3
806 In the above example 1106 is the PCI vendor ID (in hex, but without
807 the "0x" prefix) and 3230 specifies the PCI device ID of the
808 video card (also in hex, without "0x" prefix). a3 specifies the revision.
810 Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
812 config VGA_BIOS_SECOND
813 bool "Add a 2nd video BIOS image"
814 depends on ARCH_X86 && VGA_BIOS
816 Select this option if you have a 2nd video BIOS image that you would
817 like to add to your ROM.
819 config VGA_BIOS_SECOND_FILE
820 string "2nd video BIOS path and filename"
821 depends on VGA_BIOS_SECOND
824 The path and filename of the file to use as video BIOS.
826 config VGA_BIOS_SECOND_ID
827 string "Graphics device PCI IDs"
828 depends on VGA_BIOS_SECOND
830 The comma-separated PCI vendor and device ID with optional revision if that
831 feature is enabled that would associate your vBIOS to your video card.
833 Example: 1106,3230 or 1106,3230,a3
835 In the above example 1106 is the PCI vendor ID (in hex, but without
836 the "0x" prefix) and 3230 specifies the PCI device ID of the
837 video card (also in hex, without "0x" prefix). a3 specifies the revision.
839 Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
841 config CHECK_REV_IN_OPROM_NAME
844 Select this in the platform BIOS or chipset if the option rom has a revision
845 that needs to be checked when searching CBFS.
848 bool "Add a discrete VGA BIOS image"
851 Select this option if you have a VGA BIOS image for discrete GPU
852 that you would like to add to your ROM.
854 You will be able to specify the location and file name of the
857 config VGA_BIOS_DGPU_FILE
858 string "Discrete VGA BIOS path and filename"
859 depends on VGA_BIOS_DGPU
860 default "vgabios_dgpu.bin"
862 The path and filename of the file to use as VGA BIOS for discrete GPU.
864 config VGA_BIOS_DGPU_ID
865 string "Discrete VGA device PCI IDs"
866 depends on VGA_BIOS_DGPU
869 The comma-separated PCI vendor and device ID that would associate
870 your VGA BIOS to your discrete video card.
873 1002,6663 for HD 8570M
874 1002,6665 for R5 M230
876 In the above examples 1002 is the PCI vendor ID (in hex, but without
877 the "0x" prefix) and 6663 / 6665 specifies the PCI device ID of the
878 discrete video card (also in hex, without "0x" prefix).
880 Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
882 config INTEL_GMA_HAVE_VBT
885 Select this in the mainboard Kconfig to indicate the board has
888 config INTEL_GMA_ADD_VBT
889 depends on SOC_INTEL_COMMON || CPU_INTEL_COMMON
890 bool "Add a Video BIOS Table (VBT) binary to CBFS"
891 default y if INTEL_GMA_HAVE_VBT
893 Add a VBT data file to CBFS. The VBT describes the integrated
894 GPU and connections, and is needed by the GOP driver integrated into
895 FSP and the OS driver in order to initialize the display.
897 config INTEL_GMA_VBT_FILE
898 string "VBT binary path and filename"
899 depends on INTEL_GMA_ADD_VBT
900 default "src/mainboard/\$(MAINBOARDDIR)/variants/\$(VARIANT_DIR)/data.vbt" \
901 if INTEL_GMA_HAVE_VBT && VARIANT_DIR != ""
902 default "src/mainboard/\$(MAINBOARDDIR)/data.vbt" if INTEL_GMA_HAVE_VBT
903 default "3rdparty/blobs/mainboard/\$(MAINBOARDDIR)/vbt.bin"
905 The path and filename of the VBT binary.
908 bool "Enable I2C controller emulation in software"
911 This config option will enable code to override the i2c_transfer
912 routine with a (simple) software emulation of the protocol. This may
913 be useful for debugging or on platforms where a driver for the real
914 I2C controller is not (yet) available. The platform code needs to
915 provide bindings to manually toggle I2C lines.
917 config I2C_TRANSFER_TIMEOUT_US
918 int "I2C transfer timeout in microseconds"
921 Timeout for a read/write transfers on the I2C bus, that is, the
922 maximum time a device could stretch clock bits before the transfer
923 is aborted and an error returned.
925 config RESOURCE_ALLOCATOR_V3
929 This config option enables resource allocator v3 which performs
930 top down allocation of resources in a single MMIO window. This is the
931 old resource allocator meant to be used only until the broken AMD
932 chipsets are fixed. DO NOT USE THIS FOR ANY NEW CHIPSETS!
934 config RESOURCE_ALLOCATOR_V4
936 default n if RESOURCE_ALLOCATOR_V3
937 default y if !RESOURCE_ALLOCATOR_V3
939 This config option enables resource allocator v4 which uses multiple
940 ranges for allocating resources. This allows allocation of resources
941 above 4G boundary as well.
943 config RESOURCE_ALLOCATION_TOP_DOWN
944 bool "Allocate resources from top down"
946 depends on RESOURCE_ALLOCATOR_V4
948 Should be the default, but many platforms don't report resources
949 correctly. Hence, the allocator might cause conflicts.
954 Provides xHCI utility functions.