summaryrefslogtreecommitdiff
path: root/Documentation/mainboard/ocp
diff options
context:
space:
mode:
authorFurquan Shaikh <furquan@google.com>2020-11-22 11:37:44 -0800
committerFurquan Shaikh <furquan@google.com>2020-12-08 22:55:41 +0000
commit886f4e862a0b064d1055aeff8f621f3c5d1ce3ac (patch)
tree127fd50dd597380c6285fa1a564cb55dff0e655a /Documentation/mainboard/ocp
parentb652aaef990cc3eb481dea7f8d4cc3eecd92ffa1 (diff)
soc/intel/common/fast_spi: Add custom boot media device
This change enables support for a custom boot media device in fast SPI controller driver if the platform supports additional decode window for mapping BIOS regions greater than 16MiB. Following new Kconfigs are added: 1. FAST_SPI_SUPPORTS_EXT_BIOS_WINDOW: SoC can select this to indicate support for extended BIOS window. 2. EXT_BIOS_WIN_BASE: If FAST_SPI_SUPPORTS_EXT_BIOS_WINDOW is selected, this provides the base address of the host space that is reserved for mapping the extended window. 3. EXT_BIOS_WIN_SIZE: If FAST_SPI_SUPPORTS_EXT_BIOS_WINDOW is selected, this provides the size of the host space reserved for mapping extended window. If platform indicates support for extended BIOS decode window, cbfstool add command is provided additional parameters for the decode window using --ext-win-base and --ext-win-size. It is the responsibility of the mainboard fmap author to ensure that the sections in the BIOS region do not cross 16MiB boundary as the host space windows are not contiguous. This change adds a build time check to ensure no sections in FMAP cross the 16MiB boundary. Even though the platform supports extended window, it depends upon the size of BIOS region (which in turn depends on SPI flash size) whether and how much of the additional window is utilized at runtime. This change also provides helper functions for rest of the coreboot components to query how much of the extended window is actually utilized. BUG=b:171534504 Change-Id: I1b564aed9809cf14b40a3b8e907622266fc782e2 Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/47659 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'Documentation/mainboard/ocp')
0 files changed, 0 insertions, 0 deletions