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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/boards/imx.rst | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/Documentation/boards/imx.rst b/Documentation/boards/imx.rst index 56fd3ab41c..99ca10b7cc 100644 --- a/Documentation/boards/imx.rst +++ b/Documentation/boards/imx.rst @@ -118,33 +118,6 @@ Some notes about the mentioned *conditions*. - ``until_any_bit_clear`` waits until ``(*addr & mask) != mask`` is true - ``until_any_bit_set`` waits until ``(*addr & mask) != 0`` is true. -Internal Boot Mode Through Internal RAM(IRAM) ---------------------------------------------- - -The Internal Boot Mode Through Internal RAM is supported on: - -* i.MX51 - -As can be easily deduced from its name, the Internal Boot Mode Through -Internal RAM is just a variant of Internal Boot Mode so all of the -stated above still applies in this case. What it differs in is the following: - -* Boot process is done in two stages(First stage binary can be - produced with ``imx_v7-xload_defconfig``) -* DCD of the first stage image is set such that the image is fetched - into an unoccupied area or IRAM -* First stage image once uncompressed and set up will look for a - second stage bootloader on the same media it booted from and start - it(see mach-imx/xload.c for more details) -* Second stage images are just regular i.MX boot images - -Since on a typical i.MX SoC unused IRAM area is not enough to run -anything but a PBL this mode, due to its very limited usability, -serves only one purpose -- allow for a portion of a bootloader to be -executed without depending on DRAM to be functional. This peculiarity -of the mode can be used to implement various memory testing -scenarious. - USB Boot ^^^^^^^^ |