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--- swarren_brain_dump [2011/11/20 08:46] – swarren
+++ swarren_brain_dump [2012/12/26 07:01] (current) – [Using a GPT partition table] stuw
@@ Line 52: / Line 52: @@
   sudo ./nvflash -r ${downloads}
-(For correctness, you should probably add "--odmdata 0x200c0000" to all
+(For correctness, you should probably add "--odmdata 0x800c0085" to all
 the nvflash commands. See
 http://nv-tegra.nvidia.com/gitweb/?p=linux-2.6.git;a=blob;f=arch/arm/mach-tegra/odm_kit/query/harmony/tegra_devkit_custopt.h;h=1ec7010911454f19a5018952fd245785a62c59ad;hb=0e52d7fe25b11a656c376a37890be219470661fb
@@ Line 75: / Line 75: @@
   cp ac100.bct ac100.bct.orig
-  dd if=/dev/zero of=ac100.bct seek=2704 bs=48 count=1 conv=notrunc
+  dd if=/dev/zero of=ac100.bct seek=2704 bs=1 count=48 conv=notrunc
 If you don't nvflash might fail later with e.g.:
@@ Line 87: / Line 87: @@
 (as of 2011/11/19)
+(2012/01/13 UPDATE: most of the patches mentioned are upstream now, see [[uboot]] for the temporary tree with a known working version -- paulf)
 Mainline U-Boot has some Tegra support now. There's quite a bit of
@@ Line 102: / Line 104: @@
 patchwork linked above.
+<code>
 tegra2: Add support for Paz00 (Toshiba AC100)
 tegra2: Fix conflicting pinmux for UARTA
@@ Line 128: / Line 131: @@
 tegra2: Move board_mmc_init into board files
 disk: part_efi: fix regression due to incorrect buffer usage
+</code>
 ====== Running an updated U-Boot from RAM ======
@@ Line 144: / Line 147: @@
 You can use this command:
-  sudo ./nvflash --bl bootloader.bin --bct ac100.bct --odmdata 0x200c0000 --download 4 ~/git_wa/u-boot/u-boot.bin
+  sudo ./nvflash --bl bootloader.bin --bct ac100.bct --odmdata 0x800c0085 --download 4 ~/git_wa/u-boot/u-boot.bin
 Note: This works for me now. It did not work for me before when ALL of
@@ Line 214: / Line 217: @@
 and ran the following nvflash command to write this to the AC100:
   bin=bootloader.bin
   cfg=flash.cfg
   bct=ac100.bct
-  odm=0x200c0000
+  odm=0x800c0085
   sudo ./nvflash \
@@ Line 241: / Line 244: @@
 The MMC device has two 1MiB "boot sectors" at the start.
+**Note** from stuw: some ac100 have two 2Mib "boot sectors"
 Note that the term "boot sectors" comes from a flash memory background,
@@ Line 301: / Line 305: @@
 ====== Using a GPT partition table ======
-Given the existence of MMC boot-sectors, and the fact both U-Boot and Linux expose separate devices for each of the boot partitions and the rest of the MMC, I suggest creating a GPT at 2M into the device (i.e. at the start of the main portion of the flash after the boot sectors and covering until the end of the device. Then, write the BCT, Tegra PT, and bootloader into the first (or both) bootsector(s). This keeps the GPT-based and Tegra-PT-based portions of the flash completely separate. An advantage here is that the BCT can be stored right at the start of flash, which is where it's supposed to be.
+Given the existence of MMC boot-sectors, and the fact both U-Boot and Linux expose separate devices for each of the boot partitions and the rest of the MMC (the "main" partition), I suggest creating a GPT at 2M into the device (i.e. at the start of the main portion of the flash after the boot sectors and covering until the end of the device. Then, write the BCT, Tegra PT, and bootloader into the first (or both) bootsector(s). This keeps the GPT-based and Tegra-PT-based portions of the flash completely separate. An advantage here is that the BCT can be stored right at the start of flash, which is where it's supposed to be.
 A diagram:
@@ Line 313: / Line 317: @@
   |     |        | PT cover this area too.               |
   |     +--------+---------------------------------------+
-  |     | Rest   | Primary GPT                           |
+  |     | Main   | Primary GPT                           |
   |     |        | GPT partition 1                       |
   |     |        | ...                                   |
@@ Line 326: / Line 330: @@
 Write the BCT, Tegra PT, bootloader to flash as I described above.
-Create a disk image for the "Rest" by:
+Create a disk image for the main partition by:
   dd if=/dev/zero of=image.bin bs=16384 count=484864
@@ Line 340: / Line 344: @@
 The following writes the 34 GPT (512-byte) sectors to the start of the
-"rest" part of the MMC:
+main partition of the MMC:
   sudo ./nvflash --bl bootloader.bin --rawdevicewrite 1024 9 image.bin
@@ Line 388: / Line 392: @@
 a) Use bct_dump (from cbootimage) to create ac100-cboot.cfg.
-b) Edit ac100-cboot.cfg to add the following line at the end:
+b) Edit ac100-cboot.cfg to add the following line **at the end**:
   BootLoader    = u-boot.bin,0x00108000,0x00108000,Complete;