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  1. 21 May, 2021 1 commit
    • Igor Opaniuk's avatar
      feat(plat/imx8m): add SiP call for secondary boot · 9ce232fe
      Igor Opaniuk authored 
      In iMX8MM it is possible to have two copies of bootloader in
SD/eMMC and switch between them. The switch is triggered either
by the BootROM in case the bootloader image is faulty OR can be
enforced by the user. To trigger that switch the
PERSIST_SECONDARY_BOOT bit should be set in GPR10 SRC register.
As the bit is retained after WARM reset, that permits to control
BootROM behavior regarding what boot image it will boot after
reset: primary or secondary.

This is useful for reliable bootloader A/B updates, as it permits
switching between two copies of bootloader at different offsets of
the same storage.

If the PERSIST_SECONDARY_BOOT is 0, the boot ROM uses address
0x8400 for the primary image. If the PERSIST_SECONDARY_BOOT is 1,
the boot ROM reads that secondary image table from address 0x8200
on the boot media and uses the address specified in the table for
the secondary image.

Secondary Image Table contains the sector of secondary bootloader
image, exluding the offset to that image (explained below in the
note). To generate the Secondary Image Table, use e.g.:
$ printf '\x0\x0\x0\x0\x0\x0\x0\x0\x33\x22\x11'
         '\x00\x00\x10\x0\x0\x00\x0\x0\x0'
  > /tmp/sit.bin
$ hexdump  -vC /tmp/sit.bin
  00000000  00 00 00 00
  00000004  00 00 00 00
  00000008  33 22 11 00 <--- This is the "tag"
  0000000c  00 10 00 00 <--- This is the "firstSectorNumber"
  00000010  00 00 00 00

You can also use NXP script from [1][2] imx-mkimage tool for
SIT generation. Note that the firstSectorNumber is NOT the offset
of the IVT, but an offset of the IVT decremented by Image Vector
Table offset (Table 6-25. Image Vector Table Offset and Initial
Load Region Size for iMX8MM/MQ), so for secondary SPL copy at
offset 0x1042 sectors, firstSectorNumber must be 0x1000
(0x42 sectors * 512 = 0x8400 bytes offset).

In order to test redundant boot board should be closed and
SD/MMC manufacture mode disabled, as secondary boot is not
supported in the SD/MMC manufacture mode, which can be disabled
by blowing DISABLE_SDMMC_MFG (example for iMX8MM):
> fuse prog -y 2 1 0x00800000

For additional details check i.MX 8M Mini Apllication Processor
Reference Manual, 6.1.5.4.5 Redundant boot support for
expansion device chapter.

[1] https://source.codeaurora.org/external/imx/imx-mkimage/


[2] scripts/gen_sit.sh
Change-Id: I0a5cea7295a4197f6c89183d74b4011cada52d4c
Signed-off-by: default avatarIgor Opaniuk <igor.opaniuk@foundries.io>
      9ce232fe
  3. 23 Mar, 2021 2 commits
  5. 19 Aug, 2020 1 commit
  7. 06 Aug, 2020 1 commit
  9. 10 Jul, 2020 1 commit
    • Jacky Bai's avatar
      plat: imx8m: Move the gpc hw reg to a separate header file · 9e5c3e92
      Jacky Bai authored 
      

Although the GPC provides the similar functions for all the
i.MX8M SoC family, the HW register offset and bit defines
still have some slight difference, so move the hw reg
offset & most of the bitfield defines in 'gpc_reg.h' that
is specific to each SoC.
Signed-off-by: default avatarJacky Bai <ping.bai@nxp.com>
Change-Id: I291c435fe98c2f6e6ff8fe0c715ff3a83daa6a0f
      9e5c3e92
  11. 05 Mar, 2020 1 commit
  13. 24 Jan, 2020 1 commit
  15. 05 Nov, 2019 1 commit
  17. 04 Jul, 2019 1 commit
  19. 13 Mar, 2019 1 commit
    • Jacky Bai's avatar
      plat: imx8m: Add the basic support for imx8mm · 179f82a2
      Jacky Bai authored 
      

The i.MX8M Mini is new SOC of the i.MX8M family. it is
focused on delivering the latest and greatest video and
audio experience combining state-of-the-art media-specific
features with high-performance processing while optimized
for lowest power consumption. The i.MX 8M Mini Media Applications
Processor is  14nm FinFET product of the growing i.MX8M family
targeting the consumer & industrial market. It is built in 14LPP
to achieve both high performance and low power consumption
and relies on a powerful fully coherent core complex based on
a quad Cortex-A53 cluster with video and graphics accelerators

this patch add the basic support for i.MX8MM.
Signed-off-by: default avatarJacky Bai <ping.bai@nxp.com>
      179f82a2