Introduce Rust FSBL

This PR introduces some major features while also changing the project structure to be more flexible
for multiple platforms (e.g. host tooling). It also includes a lot of
bugfixes, renamings for consistency purposes and dependency updates.

Added features:

1. Pure Rust FSBL for the Zedboard. This first variant is simplistic. It
   is currently only capable of QSPI boot. It searches for a bitstream
   and ELF file inside the boot binary, flashes them and jumps to them.
2. QSPI flasher for the Zedboard.
3. DDR, QSPI, DEVC, private CPU timer and PLL configuration modules
3. Tooling to auto-generate board specific DDR and DDRIOB config
   parameters from the vendor provided ps7init.tcl file

Changed project structure:

1. All target specific project are inside a dedicated workspace inside
   the `zynq` folder now.
2. All tool intended to be run on a host are inside a `tools` workspace
3. All other common projects are at the project root

Major bugfixes:

1. SPI module: CPOL was not configured properly
2. Logger flush implementation was empty, implemented properly now.

scripts/zynq7000-init.py

@@ -7,7 +7,7 @@ import sys
 from pathlib import Path
 
 # Define the default values
-TCL_SCRIPT_NAME = "xsct-init.tcl"
+TCL_SCRIPT_NAME = "xsct-flasher.tcl"
 SCRIPTS_DIR = "scripts"
 DEFAULT_IP_ADDRESS_HW_SERVER = "localhost"
 
@@ -55,7 +55,7 @@ def main():
         default=os.getenv("TCL_INIT_SCRIPT"),
         help="Path to the ps7 initialization TCL file to prepare the processing system.\n"
         "You can also set the TCL_INIT_SCRIPT env variable to set this.\n"
-        "It is also set implicitely when specifying the SDT folder with --sdt"
+        "It is also set implicitely when specifying the SDT folder with --sdt",
     )
     parser.add_argument(
         "-b",
@@ -63,7 +63,7 @@ def main():
         dest="bit",
         default=os.getenv("ZYNQ_BITSTREAM"),
         help="Optional path to the bitstream which will also be programed to the device. It is"
-        " also searched automatically if the --sdt option is used.\n"
+        " also searched automatically if the --sdt option is used.\n",
     )
 
     args = parser.parse_args()
@@ -91,9 +91,6 @@ def main():
         print(f"The app '{args.app}' does not exist")
         sys.exit(1)
 
-    # Export environment variables
-    if args.app:
-        os.environ["APP"] = args.app
     os.environ["IP_ADDRESS_HW_SERVER"] = args.ip
     init_tcl = None
     bitstream = None
@@ -124,7 +121,9 @@ def main():
             bitstream = args.bit
         init_tcl = args.init_tcl
 
-    xsct_script = Path(TCL_SCRIPT_NAME)
+    # Get the script's directory
+    script_dir = Path(__file__).resolve().parent
+    xsct_script = script_dir / TCL_SCRIPT_NAME
 
     if not xsct_script.exists():
         xsct_script = Path(os.path.join(SCRIPTS_DIR, TCL_SCRIPT_NAME))
@@ -136,7 +135,11 @@ def main():
     # Prepare tcl_args as a list to avoid manual string concatenation issues
     cmd_list = ["xsct", str(xsct_script), init_tcl]
     if bitstream:
+        cmd_list.append("--bit")
         cmd_list.append(bitstream)
+    if args.app:
+        cmd_list.append("--app")
+        cmd_list.append(args.app)
 
     # Join safely for shell execution
     xsct_cmd = shlex.join(cmd_list)