48 lines
1.4 KiB
Markdown
48 lines
1.4 KiB
Markdown
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# IPMI KCS driver
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The driver can be found in `src/drivers/ipmi/`. It works with BMC that provide
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a KCS I/O interface as specified in the [IPMI] standard.
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The driver detects the IPMI version, reserves the I/O space in coreboot's
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resource allocator and writes the required ACPI and SMBIOS tables.
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## For developers
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To use the driver, select the `IPMI_KCS` Kconfig and add the following PNP
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device under the LPC bridge device (in example for the KCS at 0xca2):
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```
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chip drivers/ipmi
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device pnp ca2.0 on end # IPMI KCS
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end
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```
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**Note:** The I/O base address needs to be aligned to 2.
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The following registers can be set:
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* `have_nv_storage`
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* Boolean
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* If true `nv_storage_device_address` will be added to SMBIOS type 38.
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* `nv_storage_device_address`
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* Integer
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* The NV storage address as defined in SMBIOS spec for type 38.
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* `bmc_i2c_address`
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* Integer
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* The i2c address of the BMC. zero if not applicable.
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* `have_apic`
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* Boolean
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* If true the `apic_interrupt` will be added to SPMI table.
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* `apic_interrupt`
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* Integer
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* The APIC interrupt used to notify about a change on the KCS.
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* `have_gpe`
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* Boolean
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* If true the `gpe_interrupt` will be added to SPMI table.
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* `gpe_interrupt`
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* Integer
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* The bit in GPE (SCI) used to notify about a change on the KCS.
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[IPMI]: https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ipmi-second-gen-interface-spec-v2-rev1-1.pdf
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