Booting from OSPI / QSPI¶

• Table of contents
• Booting from OSPI / QSPI
  • OSPI Boot
  • QSPI Boot
    • Steps

See Boot_options for more details about the boot select pins

NOTE: Booting from OSPI is a different boot config than QSPI

OSPI Boot¶

To boot the Dev Kit from OSPI using a CL supplied image, set the boot pins as follows:

B9	B8	B7	B6	B5	B4	B3
Reserved (0)	lclk (1)	Csel (0)	0	0	0	1

QSPI Boot¶

To boot the Dev Kit from QSPI using a CL supplied image, set the boot pins as follows:

B9	B8	B7	B6	B5	B4	B3
Reserved (0)	lclk (1)	Csel (0)	0	0	1	0

Steps¶

• boot to linux (i.e. from SD card).
• Check that the spi nor was detected
  

  root@mitysom-am62x:~# cat /proc/mtd 
  dev:    size   erasesize  name
  mtd0: 00080000 00020000 "ospi.tiboot3" 
  mtd1: 00200000 00020000 "ospi.tispl" 
  mtd2: 00400000 00020000 "ospi.u-boot" 
  mtd3: 00040000 00020000 "ospi.env" 
  mtd4: 00040000 00020000 "ospi.env.backup" 
  mtd5: 0f7c0000 00020000 "ospi.rootfs" 
  mtd6: 00040000 00020000 "ospi.phypattern" 
  

• cd to boot partition (the directory containing tibot3.bin, etc.../run/media/mmcblk1p1 in my case.)
• Erase the NOR partitions
  

  root@mitysom-am62x:~# flash_erase /dev/mtd0 0 0
  root@mitysom-am62x:~# flash_erase /dev/mtd1 0 0
  root@mitysom-am62x:~# flash_erase /dev/mtd2 0 0
  

• copy the boot files to their respective locations in SPI NOR
  

  root@mitysom-am62x:~# cp tiboot3.bin /dev/mtd0
  root@mitysom-am62x:~# cp tispl.bin /dev/mtd1
  root@mitysom-am62x:~# cp u-boot.img /dev/mtd2
  root@mitysom-am62x:~# dd if=/dev/mmcblk0boot0 bs=512 iskip=13312 count=256 of=/dev/mtd3
  

      0x0 +----------------------------+
          |     ospi.tiboot3(512k)     |
          |                            |
  0x80000 +----------------------------+
          |     ospi.tispl(2m)         |
          |                            |
 0x280000 +----------------------------+
          |     ospi.u-boot(4m)        |
          |                            |
 0x680000 +----------------------------+
          |     ospi.env(128k)         |
          |                            |
 0x6c0000 +----------------------------+
          |   ospi.env.backup(128k)    |
          |                            |
 0x740000 +----------------------------+
          |      padding (768k)        |
 0x800000 +----------------------------+
          |     ospi.rootfs(ubifs)     |
          |                            |
0xffc0000 +----------------------------+
          |   ospi.phypattern (256k)   |
          |                            |
          +----------------------------+