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device/Kconfig: Introduce MMCONF_LENGTH

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This is necessary because ASL Memory32Fixed values cannot contain
operations, even if they can be evaluated to constants. Add a sanity
check in pci_mmio_cfg.h to ensure consistency with MMCONF_BUS_NUMBER.

Change-Id: I8f0b5edf166580cc12c1363d8d6b6ef0f2854be9
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50033
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Angel Pons 2021-01-28 13:04:06 +01:00
parent 67df3ff800
commit 50632878bf
2 changed files with 12 additions and 0 deletions
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8
src/device/Kconfig
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@ -521,6 +521,14 @@ config MMCONF_BUS_NUMBER
int
depends on MMCONF_SUPPORT
config MMCONF_LENGTH
hex
depends on MMCONF_SUPPORT
default 0x04000000 if MMCONF_BUS_NUMBER = 64
default 0x08000000 if MMCONF_BUS_NUMBER = 128
default 0x10000000 if MMCONF_BUS_NUMBER = 256
default 0x0
config PCI_ALLOW_BUS_MASTER
bool "Allow coreboot to set optional PCI bus master bits"
default y

4
src/include/device/pci_mmio_cfg.h
View file

@ -101,6 +101,10 @@ uint32_t *pci_mmio_config32_addr(pci_devfn_t dev, uint16_t reg)
#error "CONFIG_MMCONF_BASE_ADDRESS undefined!"
#endif
#if CONFIG_MMCONF_BUS_NUMBER * MiB != CONFIG_MMCONF_LENGTH
#error "CONFIG_MMCONF_LENGTH does not correspond with CONFIG_MMCONF_BUS_NUMBER!"
#endif
/* Avoid name collisions as different stages have different signature
* for these functions. The _s_ stands for simple, fundamental IO or
* MMIO variant.