[coreboot-gerrit] Change in coreboot[master]: superio/common: Add ssdtgen for generic SuperIOs

[Patrick Rudolph (Code Review)]

Hello Felix Held, Christian Walter, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/33033

to look at the new patch set (#25).

Change subject: superio/common: Add ssdtgen for generic SuperIOs
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superio/common: Add ssdtgen for generic SuperIOs

Add a generic SuperIO ACPI generator, dropping the need to include
additional code in DSDT for SuperIO.

It generates a device HID based on the decoded I/O range.

Tested on Supermicro X11SSH-TF using AST2400.
The SSDT contains no errors and all devices are present.

Possible TODOs:
* Add "enter config" and "exit config" bytes
* Generate support methods to enter and exit config mode
* Generate support methods to query, change or disable current
  resource settings on specific LDNs

Change-Id: I2716ae0580d68e5d4fcc484cb1648a2cdc1f4ca0
Signed-off-by: Patrick Rudolph 
---
A Documentation/superio/common/ssdt.md
M Documentation/superio/index.md
M src/arch/x86/include/arch/acpi.h
A src/superio/common/chip.h
A src/superio/common/generic.c
A src/superio/common/ssdt.c
A src/superio/common/ssdt.h
7 files changed, 534 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/33033/25