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EC_RO and WP_RO area are identical and should cover whole range needed to be write-protected. While EC_RO is for legacy firmware updater, the WP_RO is for future factory finalize test. EC_RW is for fw_updater to update both A/B at once. Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org> BUG=chrome-os-partner:9536 TEST=build in chroot and dump_fmap build/link/ec.bin opened build/link/ec.bin hit at 0x00013800 fmap_signature __FMAP__ fmap_version: 1.0 fmap_base: 0x0 fmap_size: 0x0003f800 (260096) fmap_name: EC_FMAP fmap_nareas: 16 area: 1 area_offset: 0x00000000 area_size: 0x00014000 (81920) area_name: RO_SECTION area: 2 area_offset: 0x00000000 area_size: 0x00013000 (77824) area_name: BOOT_STUB area: 5 area_offset: 0x00013800 area_size: 0x00000302 (770) area_name: FMAP area: 7 <---- area_offset: 0x00000000 <---- area_size: 0x00014000 (81920) <---- area_name: EC_RO <---- area: 8 <---- area_offset: 0x00014000 <---- area_size: 0x00028000 (163840) <---- area_name: EC_RW <---- area: 9 <---- area_offset: 0x00000000 <---- area_size: 0x00014000 (81920) <---- area_name: WP_RO <---- area: 10 area_offset: 0x00014000 area_size: 0x00014000 (81920) area_name: RW_SECTION_A area: 14 area_offset: 0x00028000 area_size: 0x00014000 (81920) area_name: RW_SECTION_B Change-Id: I11b9450f87e26ef1cd0ac65ecd059e13d8489e26
- EC Lib
This wraps Blizzard driverlib and implements the EC chip interface defined
by Google. See below diagram for architecture.
+--------------------+
| Host BIOS/OS |
+--------------------+
---- host interface ----
+--------------------+
| Google EC features |
+--------------------+
---- chip interface ---- The interface is defined in
src/platform/ec/chip_interface/*.
+--------------------+ But the real implementation is in EC Lib.
| EC Lib |
+--------------------+
| Blizzard low level |
| driver, the |
| driverlib. |
+--------------------+