Commit Graph

4 Commits

Author SHA1 Message Date
Eero Nurkkala
8e43f39141 mpfs: cache: provide L1/L2 cache enablers
E51 may configure the L1 and L2 caches. Once configured,
no reconfiguration is possible after hardware reset is
issued.

L2 is 16-way set associative with write-back policy. The
size 2 MB, from which 1 MB is utilized with the values
provided here. That's a total of 8 ways. The rest of the
L2 is left out for the bootloader usage.

mpfs_enable_cache() first checks the bootloader usage
doesn't overlap with the cache itself, thus providing a
set of functional values.

Signed-off-by: Eero Nurkkala <eero.nurkkala@offcode.fi>
2021-11-04 11:00:55 -03:00
Jani Paalijarvi
a16a9f80e2 mpfs: i2c: Add support for adaptive I2C bus frequency
Select the closest possible frequency which is smaller
than or equal to requested in I2C msg
2021-11-02 04:10:08 -05:00
Eero Nurkkala
3b330089d5 mpfs: ddr: add DDR training
This adds DDR training. The training has a small chance of failing,
and then the training is restarted.

DDR training cannot be done meaningfully while the software is
in DDR. If the system is intended to run from eNVM, like a
bootloader, the linker script should be tuned to utilize the envm
region as follows:

  envm (rx)   : ORIGIN = 0x20220100, LENGTH = 128K - 256
  l2lim (rwx) : ORIGIN = 0x08000000, LENGTH = 1024k

256 bytes are reserved for the system; The fixed block may be
installed from the 'hart-software-services' -repository:
https://github.com/polarfire-soc/hart-software-services.git

For example, the 256-byte image: hss-envm-wrapper-bm1-dummySbic.bin
may be prepended on the nuttx bootloader image in the following
manner:

 cat hss-envm-wrapper-bm1-dummySbic.bin > nuttx_bootloader.bin
 cat nuttx.bin >> nuttx_bootloader.bin
 riscv64-unknown-elf-objcopy -I binary -O ihex --change-section-lma
  *+0x20220000 nuttx_bootloader.bin flashable_image.hex

This provides an image 'flashable_image.hex' that may be flashed on
the eNVM region via Microsemi Libero tool.

Signed-off-by: Eero Nurkkala <eero.nurkkala@offcode.fi>
2021-10-21 22:40:26 -05:00
Janne Rosberg
d6205642ab add support for PolarFire SoC and icicle board
Co-authored-by: Eero Nurkkala <eero.nurkkala@offcode.fi>
2021-05-24 22:55:44 -05:00