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tools/litex_json2dts: minor changes/cleanup on #745.

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- shorten args description.
- avoid mixing initrd_start/initrd_start_offset: just use initrd_start and indicate it's relative.
- others minor cleanups.
This commit is contained in:
Florent Kermarrec 2020-12-29 08:36:55 +01:00
parent 152ae03798
commit d9a44ce10f
1 changed files with 15 additions and 12 deletions
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27
litex/tools/litex_json2dts.py
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@ -12,7 +12,7 @@ import json
import argparse
def generate_dts(d, initrd_start_offset=None, initrd_size=None):
def generate_dts(d, initrd_start=None, initrd_size=None):
kB = 1024
mB = kB*1024
@ -33,16 +33,17 @@ def generate_dts(d, initrd_start_offset=None, initrd_size=None):
"""
# Boot Arguments -------------------------------------------------------------------------------
default_initrd_start_offset = {
default_initrd_start = {
"mor1kx": 8*mB,
"vexriscv smp-linux" : 16*mB,
}
default_initrd_size = 8*mB
if initrd_start_offset is None:
initrd_start_offset = default_initrd_start_offset[cpu_name]
if initrd_start is None:
initrd_start = default_initrd_start[cpu_name]
if initrd_size is None:
initrd_size = 8*mB
initrd_size = default_initrd_size
dts += """
chosen {{
@ -54,8 +55,8 @@ def generate_dts(d, initrd_start_offset=None, initrd_size=None):
main_ram_base = d["memories"]["main_ram"]["base"],
main_ram_size = d["memories"]["main_ram"]["size"],
main_ram_size_mb = d["memories"]["main_ram"]["size"] // mB,
linux_initrd_start = d["memories"]["main_ram"]["base"] + initrd_start_offset,
linux_initrd_end = d["memories"]["main_ram"]["base"] + initrd_start_offset + initrd_size)
linux_initrd_start = d["memories"]["main_ram"]["base"] + initrd_start,
linux_initrd_end = d["memories"]["main_ram"]["base"] + initrd_start + initrd_size)
# CPU ------------------------------------------------------------------------------------------
@ -550,14 +551,16 @@ def generate_dts(d, initrd_start_offset=None, initrd_size=None):
def main():
parser = argparse.ArgumentParser(description="LiteX's CSR JSON to Linux DTS generator")
parser.add_argument("csr_json", help="CSR JSON file")
parser.add_argument("--initrd-start", type=int, help="The location the kernel will look for initrd, used to define linux,initrd-start (default depends on CPU)")
parser.add_argument("--initrd-size", type=int, help="The size of the initrd, used to calculate linux,initrd-end (default=8MB)")
parser.add_argument("--initrd-start", type=int, help="Location of initrd in RAM (relative, default depends on CPU)")
parser.add_argument("--initrd-size", type=int, help="Size of initrd (default=8MB)")
args = parser.parse_args()
d = json.load(open(args.csr_json))
print(generate_dts(d, getattr(args, "initrd_start"), getattr(args, "initrd_size")))
r = generate_dts(d,
initrd_start = args.initrd_start,
initrd_size = args.initrd_size
)
print(r)
if __name__ == "__main__":
main()