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diff --git a/chromium/docs/website/site/chromium-os/firmware-porting-guide/fmap/index.md b/chromium/docs/website/site/chromium-os/firmware-porting-guide/fmap/index.md deleted file mode 100644 index 6771fff507e..00000000000 --- a/chromium/docs/website/site/chromium-os/firmware-porting-guide/fmap/index.md +++ /dev/null @@ -1,360 +0,0 @@ ---- -breadcrumbs: -- - /chromium-os - - Chromium OS -- - /chromium-os/firmware-porting-guide - - Firmware Overview and Porting Guide -page_name: fmap -title: FMAP ---- - -Flash Map (FMAP) is a simple specification for layout of flash devices. A -reference implementation is available at [flashmap git -repo](https://chromium.googlesource.com/chromiumos/third_party/flashmap). - -Below is the FMAP defined for [Pixel 2 / -Samus](/chromium-os/developer-information-for-chrome-os-devices/chromebook-pixel-2015), -retrieved by running *dump_fmap image.bin*: - -fmap_signature __FMAP__ - -fmap_version: 1.0 - -fmap_base: 0x0 - -fmap_size: 0x00800000 (8388608) - -fmap_name: FMAP - -fmap_nareas: 33 - ->>> This section describes the attributes of this FMAP. Note that the -Samus FW image size is 8MB. - -area: 1 - -area_offset: 0x00000000 - -area_size: 0x00200000 (2097152) - -area_name: SI_ALL - ->>> This region contains the SPI descriptor in a format defined by the -on-chip SPI controller and Intel Management Engine. - -area: 2 - -area_offset: 0x00000000 - -area_size: 0x00001000 (4096) - -area_name: SI_DESC - ->>> SPI descriptor. - -area: 3 - -area_offset: 0x00001000 - -area_size: 0x001ff000 (2093056) - -area_name: SI_ME - ->>> Management Engine. - -area: 4 - -area_offset: 0x00200000 - -area_size: 0x00600000 (6291456) - -area_name: SI_BIOS - ->>> Non descriptor / ME region. - -area: 5 - -area_offset: 0x00200000 - -area_size: 0x000f0000 (983040) - -area_name: RW_SECTION_A - ->>> Region A of re-writable FW, which may be reflashed during -[auto-update](/chromium-os/chromiumos-design-docs/autoupdate-details). - -area: 6 - -area_offset: 0x00200000 - -area_size: 0x00010000 (65536) - -area_name: VBLOCK_A - ->>> Keyblock for RW Region A. - -area: 7 - -area_offset: 0x00210000 - -area_size: 0x000b0000 (720896) - -area_name: FW_MAIN_A - ->>> Rewritable ramstage BIOS image A. - -area: 8 - -area_offset: 0x002c0000 - -area_size: 0x00010000 (65536) - -area_name: PD_MAIN_A - ->>> PD MCU (USB-PD / USB-C power controller) EC image A. - -area: 9 - -area_offset: 0x002d0000 - -area_size: 0x0001ffc0 (131008) - -area_name: EC_MAIN_A - ->>> Main EC ([Embedded Controller](/chromium-os/ec-development)) image -A. - -area: 10 - -area_offset: 0x002effc0 - -area_size: 0x00000040 (64) - -area_name: RW_FWID_A - ->>> ID string of rewritable ramstage BIOS image A. Eg. -"Google_Samus.6300.174.0". - -area: 11 - -area_offset: 0x002f0000 - -area_size: 0x000f0000 (983040) - -area_name: RW_SECTION_B - ->>> Region B of re-writable FW. For redundancy / recovery on failed -update. - -area: 12 - -area_offset: 0x002f0000 - -area_size: 0x00010000 (65536) - -area_name: VBLOCK_B - -area: 13 - -area_offset: 0x00300000 - -area_size: 0x000b0000 (720896) - -area_name: FW_MAIN_B - -area: 14 - -area_offset: 0x003b0000 - -area_size: 0x00010000 (65536) - -area_name: PD_MAIN_B - -area: 15 - -area_offset: 0x003c0000 - -area_size: 0x0001ffc0 (131008) - -area_name: EC_MAIN_B - -area: 16 - -area_offset: 0x003dffc0 - -area_size: 0x00000040 (64) - -area_name: RW_FWID_B - ->>> RW Region B. - -area: 17 - -area_offset: 0x003e0000 - -area_size: 0x00010000 (65536) - -area_name: RW_MRC_CACHE - ->>> Region that stores board DRAM timing information, written during -initial memory training. - -area: 18 - -area_offset: 0x003f0000 - -area_size: 0x00004000 (16384) - -area_name: RW_ELOG - ->>> Event log. Normally exported and decoded on a Chromebook to -/var/log/eventlog. - -area: 19 - -area_offset: 0x003f4000 - -area_size: 0x00004000 (16384) - -area_name: RW_SHARED - -area: 20 - -area_offset: 0x003f4000 - -area_size: 0x00002000 (8192) - -area_name: SHARED_DATA - -area: 21 - -area_offset: 0x003f6000 - -area_size: 0x00002000 (8192) - -area_name: VBLOCK_DEV - ->>> Shared FW data related to dev-mode FW verification. - -area: 22 - -area_offset: 0x003f8000 - -area_size: 0x00002000 (8192) - -area_name: RW_VPD - ->>> Writable vital product data, eg. first use date. - -area: 23 - -area_offset: 0x003fa000 - -area_size: 0x00006000 (24576) - -area_name: RW_UNUSED - ->>> Extra / unused space in RW region. - -area: 24 - -area_offset: 0x00400000 - -area_size: 0x00200000 (2097152) - -area_name: RW_LEGACY - ->>> Alternate OtherOS payload, normally for booting SeaBIOS. - -area: 25 - -area_offset: 0x00600000 - -area_size: 0x00200000 (2097152) - -area_name: WP_RO - ->>> RO region of FW - written once at the factory and (normally) never -again. - -area: 26 - -area_offset: 0x00600000 - -area_size: 0x00004000 (16384) - -area_name: RO_VPD - ->>> RO vital product data, eg. sensor calibration data, keyboard / -region information. - -area: 27 - -area_offset: 0x00604000 - -area_size: 0x0000c000 (49152) - -area_name: RO_UNUSED - ->> Extra . unused space. - -area: 28 - -area_offset: 0x00610000 - -area_size: 0x001f0000 (2031616) - -area_name: RO_SECTION - ->>> RO FW region. - -area: 29 - -area_offset: 0x00610000 - -area_size: 0x00000800 (2048) - -area_name: FMAP - ->> Data structure that describes what you're looking at right now :) - -area: 30 - -area_offset: 0x00610800 - -area_size: 0x00000040 (64) - -area_name: RO_FRID - ->>> ID string of RO BIOS image. Eg. "Google_Samus.6300.174.0". - -area: 31 - -area_offset: 0x00610840 - -area_size: 0x000007c0 (1984) - -area_name: RO_FRID_PAD - ->>> For alignment of RO_FRID / GBB??? - -area: 32 - -area_offset: 0x00611000 - -area_size: 0x000ef000 (978944) - -area_name: GBB - ->>> Google Binary Block. Stores key information, FW screen bitmaps, and -special developer flags that can be set to modify boot behavior. - -area: 33 - -area_offset: 0x00700000 - -area_size: 0x00100000 (1048576) - -area_name: BOOT_STUB - ->>> RO Coreboot - Ramstage, romstage, CBFS, etc.
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