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Adding TFTP

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Lee Lup Yuen 2023-07-10 10:43:32 +08:00
parent e2f16aacf1
commit dfe6d44d61
1 changed files with 59 additions and 6 deletions
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README.md
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@ -1844,20 +1844,73 @@ $ curl -v tftp://x.x.x.x/a.txt
* set timeouts for state 0; Total 300000, retry 6 maxtry 50
```
https://community.arm.com/oss-platforms/w/docs/495/tftp-remote-network-kernel-using-u-boot
`bootcmd` is now...
```text
bootcmd=run load_vf2_env;run importbootenv;run load_distro_uenv;run boot2;run distro_bootcmd
bootcmd_dhcp=devtype=dhcp; if dhcp ${scriptaddr} ${boot_script_dhcp}; then source ${scriptaddr}; fi;setenv efi_fdtfile ${fdtfile}; setenv efi_old_vci ${bootp_vci};setenv efi_old_arch ${bootp_arch};setenv bootp_vci PXEClient:Arch:00027:UNDI:003000;setenv bootp_arch 0x1b;if dhcp ${kernel_addr_r}; then tftpboot ${fdt_addr_r} dtb/${efi_fdtfile};if fdt addr ${fdt_addr_r}; then bootefi ${kernel_addr_r} ${fdt_addr_r}; else bootefi ${kernel_addr_r} ${fdtcontroladdr};fi;fi;setenv bootp_vci ${efi_old_vci};setenv bootp_arch ${efi_old_arch};setenv efi_fdtfile;setenv efi_old_arch;setenv efi_old_vci;
bootcmd_distro=run fdt_loaddtb; run fdt_sizecheck; run set_fdt_distro; sysboot mmc ${fatbootpart} fat c0000000 ${bootdir}/${boot_syslinux_conf};
load_vf2_env=fatload mmc ${bootpart} ${loadaddr} ${testenv}
importbootenv=echo Importing environment from mmc${devnum} ...; env import -t ${loadaddr} ${filesize}
load_distro_uenv=fatload mmc ${fatbootpart} ${distroloadaddr} ${bootdir}/${bootenv}; env import ${distroloadaddr} 17c;
boot2 not defined, comes from `boot/vf2_uEnv.txt`
```
`bootcmd` calls `distro_bootcmd`, which runs `bootcmd_dhcp`...
```text
distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done
boot_targets=mmc0 dhcp
Other boot_targets:
bootcmd_mmc0=devnum=0; run mmc_boot
distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done
boot_targets=mmc0 dhcp
bootcmd_distro=run fdt_loaddtb; run fdt_sizecheck; run set_fdt_distro; sysboot mmc ${fatbootpart} fat c0000000 ${bootdir}/${boot_syslinux_conf};
```
`bootcmd_dhcp` is...
```text
bootcmd_dhcp=devtype=dhcp; if dhcp ${scriptaddr} ${boot_script_dhcp}; then source ${scriptaddr}; fi;setenv efi_fdtfile ${fdtfile}; setenv efi_old_vci ${bootp_vci};setenv efi_old_arch ${bootp_arch};setenv bootp_vci PXEClient:Arch:00027:UNDI:003000;setenv bootp_arch 0x1b;if dhcp ${kernel_addr_r}; then tftpboot ${fdt_addr_r} dtb/${efi_fdtfile};if fdt addr ${fdt_addr_r}; then bootefi ${kernel_addr_r} ${fdt_addr_r}; else bootefi ${kernel_addr_r} ${fdtcontroladdr};fi;fi;setenv bootp_vci ${efi_old_vci};setenv bootp_arch ${efi_old_arch};setenv efi_fdtfile;setenv efi_old_arch;setenv efi_old_vci;
```
Cleaned up...
```text
devtype=dhcp;
if dhcp ${scriptaddr} ${boot_script_dhcp};
then source ${scriptaddr};
fi;
setenv efi_fdtfile ${fdtfile};
setenv efi_old_vci ${bootp_vci};
setenv efi_old_arch ${bootp_arch};
setenv bootp_vci PXEClient:Arch:00027:UNDI:003000;
setenv bootp_arch 0x1b;
if dhcp ${kernel_addr_r};
then tftpboot ${fdt_addr_r} dtb/${efi_fdtfile};
if fdt addr ${fdt_addr_r};
then bootefi ${kernel_addr_r} ${fdt_addr_r};
else bootefi ${kernel_addr_r} ${fdtcontroladdr};
fi;
fi;
setenv bootp_vci ${efi_old_vci};
setenv bootp_arch ${efi_old_arch};
setenv efi_fdtfile;
setenv efi_old_arch;
setenv efi_old_vci;
```
https://community.arm.com/oss-platforms/w/docs/495/tftp-remote-network-kernel-using-u-boot
```text
Save your host PC's IP address to the `serverip' environment variable: