diff options
| author | Patrick Georgi <pgeorgi@google.com> | 2017-08-22 20:26:24 +0200 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-08-30 03:58:28 -0700 |
| commit | f1dfc4cbac2140f51f4a40fec790755ca7d4fafe (patch) | |
| tree | 8bfd0c526430ea8dd4ec070603f5d979333a0a33 /include/ec_commands.h | |
| parent | 6844e4c2793b736b873f97510238ae6ed03c0772 (diff) | |
| download | chrome-ec-f1dfc4cbac2140f51f4a40fec790755ca7d4fafe.tar.gz | |
acpi: Map EC features into ACPI EC memory space
Reserve EC address space offset 0x0a-0x0d for device features. Same
value as with the host command, just different way to access it.
BUG=b:64705535
BRANCH=none
TEST=none
Change-Id: I420aed1ae8d0fb7da477fc72ac55ea75a9f9350b
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://chromium-review.googlesource.com/626976
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@google.com>
Diffstat (limited to 'include/ec_commands.h')
| -rw-r--r-- | include/ec_commands.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/ec_commands.h b/include/ec_commands.h index 8be7a4df8a..633640defd 100644 --- a/include/ec_commands.h +++ b/include/ec_commands.h @@ -326,6 +326,27 @@ #define EC_ACPI_MEM_DEVICE_TABLET_MODE 0x01 /* + * Report device features. Uses the same format as the host command, except: + * + * bit 0 (EC_FEATURE_LIMITED) changes meaning from "EC code has a limited set + * of features", which is of limited interest when the system is already + * interpreting ACPI bytecode, to "EC_FEATURES[0-7] is not supported". Since + * these are supported, it defaults to 0. + * This allows detecting the presence of this field since older versions of + * the EC codebase would simply return 0xff to that unknown address. Check + * FEATURES0 != 0xff (or FEATURES0[0] == 0) to make sure that the other bits + * are valid. + */ +#define EC_ACPI_MEM_DEVICE_FEATURES0 0x0a +#define EC_ACPI_MEM_DEVICE_FEATURES1 0x0b +#define EC_ACPI_MEM_DEVICE_FEATURES2 0x0c +#define EC_ACPI_MEM_DEVICE_FEATURES3 0x0d +#define EC_ACPI_MEM_DEVICE_FEATURES4 0x0e +#define EC_ACPI_MEM_DEVICE_FEATURES5 0x0f +#define EC_ACPI_MEM_DEVICE_FEATURES6 0x10 +#define EC_ACPI_MEM_DEVICE_FEATURES7 0x11 + +/* * ACPI addresses 0x20 - 0xff map to EC_MEMMAP offset 0x00 - 0xdf. This data * is read-only from the AP. Added in EC_ACPI_MEM_VERSION 2. */ |