mb/apple/macbookair4_2: Add CMOS support
Added CMOS support for MacBook Air 4,2. In future, I hope there will
be more useful options available, because I'm working on macbooks
support.
Also, it may be necessary for hyper_threading support (#29669) once it
will be ready.
Change-Id: I369ed9aeff2098a4840918531be6a34cfc8d2a1e
Signed-off-by: Evgeny Zinoviev <me@ch1p.io>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33045
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Peter Lemenkov <lemenkov@gmail.com>
diff --git a/src/mainboard/apple/macbookair4_2/Kconfig b/src/mainboard/apple/macbookair4_2/Kconfig
index 771f327..627b421 100644
--- a/src/mainboard/apple/macbookair4_2/Kconfig
+++ b/src/mainboard/apple/macbookair4_2/Kconfig
@@ -14,6 +14,8 @@
select SYSTEM_TYPE_LAPTOP
select GFX_GMA_INTERNAL_IS_EDP
select MAINBOARD_HAS_LIBGFXINIT
+ select HAVE_CMOS_DEFAULT
+ select HAVE_OPTION_TABLE
config MAINBOARD_DIR
string
diff --git a/src/mainboard/apple/macbookair4_2/cmos.default b/src/mainboard/apple/macbookair4_2/cmos.default
new file mode 100644
index 0000000..06b0433
--- /dev/null
+++ b/src/mainboard/apple/macbookair4_2/cmos.default
@@ -0,0 +1,2 @@
+boot_option=Fallback
+debug_level=Debug
diff --git a/src/mainboard/apple/macbookair4_2/cmos.layout b/src/mainboard/apple/macbookair4_2/cmos.layout
new file mode 100644
index 0000000..4f5df93
--- /dev/null
+++ b/src/mainboard/apple/macbookair4_2/cmos.layout
@@ -0,0 +1,85 @@
+##
+## This file is part of the coreboot project.
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+# -----------------------------------------------------------------
+entries
+# -----------------------------------------------------------------
+# Status Register A
+# -----------------------------------------------------------------
+# Status Register B
+# -----------------------------------------------------------------
+# Status Register C
+#96 4 r 0 status_c_rsvd
+#100 1 r 0 uf_flag
+#101 1 r 0 af_flag
+#102 1 r 0 pf_flag
+#103 1 r 0 irqf_flag
+# -----------------------------------------------------------------
+# Status Register D
+#104 7 r 0 status_d_rsvd
+#111 1 r 0 valid_cmos_ram
+# -----------------------------------------------------------------
+# Diagnostic Status Register
+#112 8 r 0 diag_rsvd1
+# -----------------------------------------------------------------
+0 120 r 0 reserved_memory
+#120 264 r 0 unused
+# -----------------------------------------------------------------
+# RTC_BOOT_BYTE (coreboot hardcoded)
+384 1 e 4 boot_option
+388 4 h 0 reboot_counter
+#390 2 r 0 unused?
+# -----------------------------------------------------------------
+# coreboot config options: console
+#392 3 r 0 unused
+395 4 e 6 debug_level
+#399 1 r 0 unused
+#400 8 r 0 reserved for century byte
+# coreboot config options: southbridge
+408 1 e 1 nmi
+409 2 e 7 power_on_after_fail
+# coreboot config options: cpu
+#424 8 r 0 unused
+# coreboot config options: northbridge
+#432 5 e 11 gfx_uma_size
+#437 3 r 0 unused
+#440 8 h 0 volume
+# SandyBridge MRC Scrambler Seed values
+896 32 r 0 mrc_scrambler_seed
+928 32 r 0 mrc_scrambler_seed_s3
+960 16 r 0 mrc_scrambler_seed_chk
+# coreboot config options: check sums
+984 16 h 0 check_sum
+# -----------------------------------------------------------------
+enumerations
+#ID value text
+1 0 Disable
+1 1 Enable
+2 0 Enable
+2 1 Disable
+4 0 Fallback
+4 1 Normal
+6 0 Emergency
+6 1 Alert
+6 2 Critical
+6 3 Error
+6 4 Warning
+6 5 Notice
+6 6 Info
+6 7 Debug
+6 8 Spew
+7 0 Disable
+7 1 Enable
+7 2 Keep
+# -----------------------------------------------------------------
+checksums
+checksum 392 447 984