GitLab

auto-boot Linux image located in SPI flash.

settings from Microsemi.

to the U-Boot prompt on the serial console.

in FPGA design.

runs from eNVM. Helps U-boot performance a bit.

that the hardware starts up correctly on reset / power-on.

Revert "RT #80404. Added workaround for Libero bug - initialize iomuxes for"
This reverts commit b38452d4.

Removed the iomux cell initialization workaround, found the real fix -
the FPGA_RPRG pin was incorrectly pulled down on the M2S-SOM module.

modules running at 120 and 150 MHz.

- sf probe 0
- sf read a0000000 100000 f00000
reads a 15MB file into DDR for ~3sec.

UART0 and SPI in U-Boot.

Use only with the respective .stp design!

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Vadim Aleynikov <vadim_a@emcraft.com>
Signed-off-by: Alexander Potashev <aspotashev@emcraft.com>
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

This is required for any code execution (including the Linux kernel) in
the external RAM on SmartFusion2 (M2S).

We will reuse this function on SmartFusion2 (M2S).

There's no compatibility with A2F SPI now, so give the appropriate
names to constants, and funtions.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

In this case DDR Bridge buffering BUG isn't triggered.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

We suspect some BUG in the buffering scheme. See RT records for
details.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

This is to avoid slowing things down, when we'll switch to malloc
in external mem.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

This is more precise.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

This allow to dramatically speed-up xfers on high SPI CLKs (previo-
usly we got stuck at ~ 1MHz; higher clocks gave nothing because of
program CPU execution latencies).
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Use more compact macros to access reags instead of read/write.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Supported:
 - UART0 (57600)
 - SPI0 (non-DMA)
 - Ethernet
 - LPDDR
 - Env in SPI Flash

definition of CONFIG_MEM_NVM_UBOOT_OFF for those U-boot configuraitons
that do not require that macro.

U-boot to run from eNVM at offset 0x20000:

- to program that U-boot to eNVM: cptf 0x20000 ${loadaddr} ${filesize} 0
- to run that U-boot from eNVM: go 20375