diff options
| author | Alexandru Gagniuc <alexandrux.gagniuc@intel.com> | 2016-03-30 14:38:44 -0700 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-05-06 18:59:00 +0200 |
| commit | 851ef96f4e44888095d4f4f435fa68d44dbe2240 (patch) | |
| tree | 38fec3230bbef2d1d991a88278e339eb0b59b4b1 /src/ec/google/chromeec/ec.h | |
| parent | 3aa34a8167c0e0f0ecdb823b5ab1de5c3b171f06 (diff) | |
ec/google/chromeec/ec_lpc: Declare used IO ports as a resource
Chrome EC uses IO ports 0x800 -> 0x9ff to communicate over LPC;
however, those ports were not declared as a resource. This had two
major downsides:
* It allowed the allocator to assign said ports to other devices
* It required manually open up an IO window in the LPC bridge.
The LPC bridge on many chromeec boards had to be painstakingly
adjusted to meet these constraints.
The advantage of declaring the resources upfront is that the lpc
bridge can now scan its child resources and automatically open up
IO windows, as requested by its LPC children devices.
Change-Id: I35c4e48dddb7300674d7a9858b590c1f20e3b0e3
Signed-off-by: Alexandru Gagniuc <alexandrux.gagniuc@intel.com>
Reviewed-on: https://review.coreboot.org/14585
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/ec/google/chromeec/ec.h')
| -rw-r--r-- | src/ec/google/chromeec/ec.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/ec/google/chromeec/ec.h b/src/ec/google/chromeec/ec.h index 7f52362f2d..85f41adf25 100644 --- a/src/ec/google/chromeec/ec.h +++ b/src/ec/google/chromeec/ec.h @@ -59,6 +59,10 @@ int google_chromeec_vstore_info(uint32_t *locked); int google_chromeec_vstore_read(int slot, uint8_t *data); int google_chromeec_vstore_write(int slot, uint8_t *data, size_t size); +/* MEC uses 0x800/0x804 as register/index pair, thus an 8-byte resource. */ +#define MEC_EMI_BASE 0x800 +#define MEC_EMI_SIZE 8 + /* For MEC, access ranges 0x800 thru 0x9ff using EMI interface instead of LPC */ #define MEC_EMI_RANGE_START EC_HOST_CMD_REGION0 #define MEC_EMI_RANGE_END (EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SIZE) |