ROM_EXT end-to-end tests

ROM_EXT bootstrap

Properties to test:

• ROM_EXT drops down to bootstrap mode iff bootstrap is enabled by OTP (OWNER_SW_CFG_ROM_EXT_BOOTSTRAP_EN) and it cannot find a bootable silicon owner image. The full truth table:

  #	Enabled in OTP	Bootable silicon owner image	Expect bootstrap
  1	No	None	No
  2	No	Slot A	No
  3	No	Slot B	No
  4	No	Slot A and B	No
  5	Yes	None	Yes
  6	Yes	Slot A	No
  7	Yes	Slot B	No
  8	Yes	Slot A and B	No

• ROM_EXT bootstrap will not erase the chip until it receives a CHIP_ERASE or SECTOR_ERASE SPI command.

• ROM_EXT bootstrap will neither erase nor program the ROM_EXT region of slot A.

• ROM_EXT bootstrap will erase and program the owner/BL0 region of slot A.

• ROM_EXT bootstrap will neither erase nor program the ROM_EXT region of slot B.

• ROM_EXT bootstrap will erase, but will not program the owner/BL0 region of slot A.