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Simplify boot parameters and document options

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This commit is contained in:
Rodrigo Arias 2024-07-09 17:27:07 +02:00
parent b8f1ca672f
commit 4707a8b143
1 changed files with 12 additions and 3 deletions
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15
lagarto-ox.nix
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@ -260,9 +260,18 @@
# Reduce memory to 3 GiB [0x80000000, 0x140000000)
fdt set /memory@80000000 reg <0x0 0x80000000 0x0 0xc0000000>
# Set kernel options
setenv debugargs "debug1 trace_options=sym-addr trace_event=initcall:* tp_printk trace_buf_size=1M"
setenv bootargs "root=/dev/ram0 loglevel=7 debug rw earlycon=sbi boot.trace console=hvc0 \''${debugargs} init=${init}"
# Set kernel bootcmd options.
# NixOS interesting options:
# debug1 enable debug shell in stage 1
# boot.trace enable set -x in stage 1
# boot.tracedebug enable set -x in stage 2
# Ftrace interesting options:
# trace_event=initcall:* trace the init function of drivers
# trace_options=sym-addr display function address
# tp_printk write ftrace events to console
# trace_buf_size=1M set ftrace buffer to 1M
#
setenv bootargs "root=/dev/ram0 loglevel=7 debug rw earlycon=sbi console=hvc0 init=${init}"
EOF