diff options
Diffstat (limited to 'target/linux/mediatek/image/mt7623n_bpir2-uEnv.txt')
| -rw-r--r-- | target/linux/mediatek/image/mt7623n_bpir2-uEnv.txt | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/target/linux/mediatek/image/mt7623n_bpir2-uEnv.txt b/target/linux/mediatek/image/mt7623n_bpir2-uEnv.txt new file mode 100644 index 0000000000..f260ed9176 --- /dev/null +++ b/target/linux/mediatek/image/mt7623n_bpir2-uEnv.txt @@ -0,0 +1,78 @@ +# Boot menu for Banana Pi R2 +# Copyright © 2020 David Woodhouse <dwmw2@infradead.org> + +kernel=uImage +loadaddr=0x88000000 +dtaddr=0x83f00000 +fdt_high=0xffffffff + +console=ttyS2,115200 +bootopts=rootfstype=squashfs,ext4 rootwait + +# Create the command line (with appropriate root=) and boot the Linux FIT image. +boot1=setenv bootargs "console=${console} root=${rootdev} ${bootopts}";printenv bootargs;\ + fatload mmc ${partition} ${loadaddr} ${kernel}; bootm + +# The preloader leaves a breadcrumb behind to say what it booted from. +checkbootedfrom=if itest.l *81dffff0 == 434d4d65 ; then setenv bootedfrom eMMC; else setenv bootedfrom SD; fi; + +# Build the boot menu one item at a time +bm_count=0 +checkkernel=test -e mmc ${bm_part} ${kernel} +addbm=if run checkkernel; then setenv bootmenu_${bm_count} "Boot from ${bm_dev}.=setenv partition ${bm_part};setenv rootdev ${bm_root};run boot1";if test "${bootedfrom}" = "${bm_dev}"; then setenv bootmenu_default ${bm_count};fi;setexpr bm_count ${bm_count} + 1; fi +# Here we assume that SD card id mmcblk1 and eMMC is mmcblk0 in linux. Swap them if your DTS define them in reverse order. +addeMMCbm=setenv bm_part 0:2;setenv bm_root /dev/mmcblk0p3;setenv bm_dev eMMC;run addbm +addSDbm=setenv bm_part 1:2;setenv bm_root /dev/mmcblk1p3;setenv bm_dev SD;run addbm +addinstallbm=if test "${bootedfrom}" = "SD";then run checkinstall; if run validparts; then setenv bootmenu_${bm_count} "Install OpenWrt from SD to internal eMMC.=run doinstall";setexpr bm_count ${bm_count} + 1;fi;fi + +runbootmenu=if test "${bootedfrom}" = "";then run checkbootedfrom;fi;\ + setenv bm_count 0;run addeMMCbm;run addSDbm;run addinstallbm;setenv bootmenu_${bm_count};\ + bootmenu + +bootdelay=0 +bootcmd=run checkbootedfrom;run runbootmenu + +# XX: Can we read this from the device, or must we trust they're all the same as mine? +# Probably not that important as we're unlikely ever to hit the limit anyway. +maxsect=0xe8ffff +validparts=false + +# We could use 'part size' here but I'd like to check the types too. +checkinstall=mmc dev 1;\ + mmc read 0x88000002 0 1;\ + setenv validparts true;\ + test -e mmc 1:2 eMMCboot.bin || setenv validparts false && echo "eMMCboot.bin not present on SD partition 2";\ + if run validparts && itest.b *0x880001c4 != 0x41; then echo "SD partition 1 is not a PReP Boot partition"; setenv validparts false; fi;\ + if run validparts && itest.l *0x880001c8 != 0x280; then echo "SD partition 1 does not start at 320KiB for U-Boot"; mmc part; exit; fi;\ + if run validparts && itest.l *0x880001cc != 0x400; then echo "SD partition 1 is not 512KiB in size for U-Boot"; mmc part; exit; fi;\ + if run validparts && itest.b *0x880001d4 != 0x0c; then echo "SD partition 2 is not a FAT32 partition"; setenv validparts false; fi;\ + if run validparts && itest.b *0x880001e4 != 0x83; then echo "SD partition 3 is not a Linux partition"; setenv validparts false; fi;\ + setexpr.l part2_start *0x880001d8;setexpr.l part2_len *0x880001dc;setexpr.l part3_start *0x880001e8;setexpr.l part3_len *0x880001ec;\ + if run validparts && test 0x${part2_start} -gt ${maxsect}; then echo "SD partition 2 start too high"; setenv validparts false; fi;\ + if run validparts && test 0x${part2_len} -gt ${maxsect}; then echo "SD partition 2 is too large"; setenv validparts false; fi;\ + if run validparts && test 0x${part3_start} -gt ${maxsect}; then echo "SD partition 3 start too high"; setenv validparts false; fi;\ + if run validparts && test 0x${part3_len} -gt ${maxsect}; then echo "SD partition 2 is too large"; setenv validparts false; fi;\ + setexpr.l part2_end 0x$(part2_start} + 0x${part2_len};setexpr.l part3_end 0x${part3_start} + 0x${part3_len};\ + if run validparts && test 0x${part2_end} -ge ${maxsect}; then echo "SD partition 2 end too high"; setenv validparts false; fi;\ + if run validparts && test 0x${part3_end} -ge ${maxsect}; then echo "SD partition 3 end too high"; setenv validparts false; fi; + +# Copy a single chunk, up to 0x8000 sectors / 16MiB, from SD to eMMC at the specified offset. +writechunk=setenv thislen 8000; if test 0x${partlen} -lt 0x${thislen}; then setenv thislen ${partlen};fi;\ + mmc dev 1;mmc read ${loadaddr} 0x${partofs} 0x${thislen};\ + mmc dev 0; mmc write ${loadaddr} 0x${partofs} 0x${thislen};\ + setexpr partofs 0x${partofs} + 0x${thislen};setexpr partlen 0x${partlen} - 0x${thislen} + +# Copy a partition defined by ${partofs} / ${partlen} from SD to eMMC +writepart=while test 0x${partlen} -ne 0; do run writechunk; done + +# Configure the eMMC boot partition and write eMMCboot.bin to it +writeboot=mmc partconf 0 1 1 0;fatload mmc 1:2 ${loadaddr} eMMCboot.bin;\ + setexpr filesize ${filesize} + 0x1ff;setexpr blocks ${filesize} / 0x200;\ + mmc dev 0 1;mmc write ${loadaddr} 0 ${blocks} + +# Install OpenWrt from the SD card to internal eMMC. +doinstall=run checkinstall;if run validparts;then run writeboot;\ + echo "Copying preloader and U-Boot";setenv partofs 0;setenv partlen 680;run writepart;\ + echo "Copying FAT boot partition";setenv partofs ${part2_start};setenv partlen ${part2_len};run writepart;\ + echo "Copying root partition";setenv partofs ${part3_start};setenv partlen ${part3_len};run writepart;\ + echo "Installed OpenWrt to eMMC";setenv bootedfrom eMMC;run runbootmenu;fi |