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u-boot-brain/board/freescale/ls2080a
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York Sun 4961eafc25 armv8: layerscape: Update early MMU for DDR after initialization 
In early MMU table, DDR has to be mapped as device memory to avoid
speculative access. After DDR is initialized, it needs to be updated
to normal memory to allow code execution. To simplify the code,
dram_init() is moved into a common file as a weak function.

Signed-off-by: York Sun <york.sun@nxp.com>
2017-03-14 08:44:03 -07:00
..
ddr.c armv8: layerscape: Rewrite memory reservation 2017-03-14 08:44:03 -07:00
ddr.h armv8: LS2080A: Rename LS2085A to reflect LS2080A 2015-11-30 08:53:04 -08:00
Kconfig NXP: Introduce board/freescale/common/Kconfig and migrate CHAIN_OF_TRUST 2017-01-24 10:33:59 -05:00
ls2080a.c armv8: layerscape: Update early MMU for DDR after initialization 2017-03-14 08:44:03 -07:00
MAINTAINERS armv8: fsl-layerscape: Add NXP LS2088A SoC support 2016-11-22 11:37:54 -08:00
Makefile armv8: LS2080A: Rename LS2085A to reflect LS2080A 2015-11-30 08:53:04 -08:00
README Use correct spelling of "U-Boot" 2016-02-06 12:00:59 +01:00

README 

Freescale ls2080a_emu

This is a emulator target with limited peripherals.

Memory map from core's view

0x00_0000_0000 .. 0x00_000F_FFFF	Boot Rom
0x00_0100_0000 .. 0x00_0FFF_FFFF	CCSR
0x00_1800_0000 .. 0x00_181F_FFFF	OCRAM
0x00_3000_0000 .. 0x00_3FFF_FFFF	IFC region #1
0x00_8000_0000 .. 0x00_FFFF_FFFF	DDR region #1
0x05_1000_0000 .. 0x05_FFFF_FFFF	IFC region #2
0x80_8000_0000 .. 0xFF_FFFF_FFFF	DDR region #2

Other addresses are either reserved, or not used directly by U-Boot.
This list should be updated when more addresses are used.

Booting Linux flavors which do not support 48-bit VA (< Linux 3.18)
-------------------------------------------------------------------
One needs to use appropriate bootargs to boot Linux flavors which do
not support 48-bit VA (for e.g. < Linux 3.18) by appending mem=2048M, as shown
below:

=> setenv bootargs 'console=ttyS1,115200 root=/dev/ram
   earlycon=uart8250,mmio,0x21c0600,115200 default_hugepagesz=2m hugepagesz=2m
   hugepages=16 mem=2048M'