zynqmp-pmufw-builder's Introduction

zynqmp-pmufw-builder

This is a simple script to build a PMU firmware for the Xilinx ZynqMP System-on-Chip.

It design goals are to:

be simple to use: just type a few commands to have a PMU firmware ready
be easy to understand and modify to your needs
have minimal dependencies: only crosstool-NG and the PMU firmware source code are needed

Usage

Get the source code:

git clone --recurse-submodules https://github.com/lucaceresoli/zynqmp-pmufw-builder.git
cd zynqmp-pmufw-builder

Generate a suitable microblaze toolchain (this is normally needed only once):
```
./build.sh toolchain
```
At the end a toolchain will be available in ~/x-tools/microblazeel-xilinx-elf/.
Build it:
```
./build.sh pmufw-build
```
The PMU firmware will be called pmufw.bin in the current directory. Custom compiler flags can be passed in the CFLAGS environment variable, E.G.:
```
CFLAGS="-DENABLE_EM" ./build.sh pmufw-build
```

Enjoy!

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zynqmp-pmufw-builder's Issues

Fatal warning -Wstringop-overflow

I get the following fatal warning when building the pmufw, the xpfw_restart.c file.
I don't think the warning is valid in this case since it is a raw memory copy.
I am curious why someone else hasn't complained about this though.
A fix is adding -Wno-stringop-overflow to CFLAGS in build.sh which I think is okay since we aren't writing any new code here and just want to compile and use the same as xilinx tools are using.

Do you want a patch for this? Or am I just bonkers.

In function 'XPfw_StoreFsblToDDR',
    inlined from 'XPfw_StoreFsblToDDR' at xpfw_restart.c:636:5,
    inlined from 'CheckFsblCompletion' at xpfw_mod_common.c:97:12,
    inlined from 'CheckFsblCompletion' at xpfw_mod_common.c:31:13:
xpfw_restart.c:656:31: warning: 'memcpy' writing 174080 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=]
  656 |                         (void)memcpy((u32 *)FSBL_STORE_ADDR, (u32 *)FSBL_LOAD_ADDR,
      |                               ^
In function 'XPfw_RestoreFsblToOCM',
    inlined from 'XPfw_RestoreFsblToOCM' at xpfw_restart.c:693:5,
    inlined from 'PmMasterRestart' at pm_master.c:973:13,
    inlined from 'PmSystemShutdown' at pm_core.c:1302:12,
    inlined from 'PmProcessRequest' at pm_core.c:2097:3:
xpfw_restart.c:718:23: warning: 'memcpy' writing 174080 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=]
  718 |                 (void)memcpy((u32 *)FSBL_LOAD_ADDR, (u32 *)FSBL_STORE_ADDR,
      |                       ^