1 # HP EliteBook Folio 9480m
3 This page is about the notebook [HP EliteBook Folio 9480m].
7 HP EliteBook Folio 9480m was released in 2014 and is now end of life.
8 It can be bought from a secondhand market like Taobao or eBay.
10 ## Required proprietary blobs
12 The following blobs are required to operate the hardware:
18 HP EliteBook Folio 9480m uses SMSC MEC1322 as its embedded controller.
19 The EC firmware is stored in the flash chip, but we don't need to touch it
20 or use it in the coreboot build process.
22 Intel ME firmware is in the flash chip. It is not needed when building coreboot.
24 The Haswell memory reference code binary is needed when building coreboot.
25 Please see [mrc.bin](../../northbridge/intel/haswell/mrc.bin).
29 Before flashing, remove the battery and the hard drive cover according to the
30 [Maintenance and Service Guide] of this laptop.
32 ![Two flash chips of HP EliteBook Folio 9480m](folio_9480m_flash.webp)
34 HP EliteBook Folio 9480m has two flash chips, a 16MiB system flash, and a 2MiB
35 private flash. To install coreboot, we need to program both flash chips.
36 Read [HP Sure Start] for detailed information.
38 To access the system flash, we need to connect the AC adapter to the machine,
39 then clip on the flash chip with an SOIC-8 clip. An [STM32-based flash programmer]
40 made with an STM32 development board is tested to work.
42 To access the private flash chip, we can use a ch341a based flash programmer and
43 flash the chip with the AC adapter disconnected.
45 Before flashing coreboot, we need to do the following:
47 1. Erase the private flash to disable the IFD protection
48 2. Modify the IFD to shrink the BIOS region, so that we'll not use or override
49 the protected bootblock and PEI region, as well as the EC firmware
51 To erase the private flash chip, attach it with the flash programmer via the SOIC-8 clip,
54 flashrom -p <programmer> --erase
56 To modify the IFD, we need a new flash layout. The flash layout of the OEM firmware is:
61 00600000:00ffffff bios
63 The default coreboot configuration sets the flash chip size to 12MiB, so set the end of the
64 BIOS region to 0xbfffff in the new layout. The modified IFD is as follows (Platform Data
65 region pd is the region protected by HP Sure Start):
70 00600000:00bfffff bios
73 Write the above layout in a file, and use ifdtool to modify the IFD of a flash image.
74 Suppose the above layout file is ``layout.txt`` and the origin content of the system flash
75 is in ``factory-sys.rom``, run:
77 ifdtool -n layout.txt factory-sys.rom
79 Then a flash image with a new IFD will be in ``factory-sys.rom.new``.
81 Flash the IFD of the system flash:
83 flashrom -p <programmer> --ifd -i fd -w factory-sys.rom.new
85 Then flash the coreboot image:
87 # first extend the 12M coreboot.rom to 16M
88 fallocate -l 16M build/coreboot.rom
89 flashrom -p <programmer> --ifd -i bios -w build/coreboot.rom
91 After coreboot is installed, the coreboot firmware can be updated with internal flashing:
93 flashrom -p internal --ifd -i bios --noverify-all -w build/coreboot.rom
97 The board can be debugged with EHCI debug. The EHCI debug port is the USB port on the left.
103 - GRUB payload freezes just like previous EliteBook laptops
104 - Sometimes the PCIe WLAN module can not be found in the OS after booting to the system
105 - Sometimes all the USB devices can not be found in the OS after S3 resume
114 - i5-4310U CPU with 4G+4G memory
115 - SATA and M.2 SATA disk
121 - Keyboard and touchpad
125 - Audio output from speaker and headphone jack
130 - Arch Linux with Linux 5.8.9
131 - Memory initialization with mrc.bin version 1.6.1 Build 2
132 - Graphics initialization with libgfxinit
133 - Payload: SeaBIOS, edk2
135 - KBC Revision 92.15 from OEM firmware version 01.33
136 - KBC Revision 92.17 from OEM firmware version 01.50
137 - Internal flashing under coreboot
142 +------------------+-----------------------------+
143 | CPU | Intel Haswell-ULT |
144 +------------------+-----------------------------+
145 | PCH | Intel Lynx Point Low Power |
146 +------------------+-----------------------------+
147 | EC | SMSC MEC1322 |
148 +------------------+-----------------------------+
149 | Coprocessor | Intel Management Engine |
150 +------------------+-----------------------------+
153 [HP EliteBook Folio 9480m]: https://support.hp.com/us-en/product/hp-elitebook-folio-9480m-notebook-pc/7089926
154 [Maintenance and Service Guide]: http://h10032.www1.hp.com/ctg/Manual/c05228980
155 [STM32-based flash programmer]: https://github.com/dword1511/stm32-vserprog
156 [HP Sure Start]: hp_sure_start.md