diff options
| author | Felix Held <felix-coreboot@felixheld.de> | 2024-01-11 22:26:18 +0100 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2024-01-16 22:59:55 +0000 |
| commit | 3b5b66d82954e026a91a1eff833fa7f652fed629 (patch) | |
| tree | c7ff2cb87807e204d6f9e04e1cae14516eae0801 /src/device/Kconfig | |
| parent | 090ea7ab8fceae54488620160aa95da4292d663f (diff) | |
device: Add support for multiple PCI segment groups
Add initial support for multiple PCI segment groups. Instead of
modifying secondary in the bus struct introduce a new segment_group
struct element and keep existing common code.
Since all platforms currently only use 1 segment this is not a
functional change. On platforms that support more than 1 segment the
segment has to be set when creating the PCI domain.
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ied3313c41896362dd989ee2ab1b1bcdced840aa8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79927
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
Diffstat (limited to 'src/device/Kconfig')
| -rw-r--r-- | src/device/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/device/Kconfig b/src/device/Kconfig index 5202c186b4..e5b90bbcb0 100644 --- a/src/device/Kconfig +++ b/src/device/Kconfig @@ -589,6 +589,13 @@ config ECAM_MMCONF_BASE_ADDRESS config ECAM_MMCONF_BUS_NUMBER int depends on ECAM_MMCONF_SUPPORT + help + Total number of PCI buses in the system across all segment groups. + The number needs to be a power of 2. For values <= 256, + PCI_BUSES_PER_SEGMENT_GROUP is CONFIG_ECAM_MMCONF_BUS_NUMBER and + PCI_SEGMENT_GROUP_COUNT is 1. For values > 256, + PCI_BUSES_PER_SEGMENT_GROUP is 256 and PCI_SEGMENT_GROUP_COUNT is + CONFIG_ECAM_MMCONF_BUS_NUMBER / 256. config ECAM_MMCONF_LENGTH hex @@ -597,6 +604,8 @@ config ECAM_MMCONF_LENGTH default 0x04000000 if ECAM_MMCONF_BUS_NUMBER = 64 default 0x08000000 if ECAM_MMCONF_BUS_NUMBER = 128 default 0x10000000 if ECAM_MMCONF_BUS_NUMBER = 256 + default 0x20000000 if ECAM_MMCONF_BUS_NUMBER = 512 + default 0x80000000 if ECAM_MMCONF_BUS_NUMBER = 1024 default 0x0 config PCI_ALLOW_BUS_MASTER |