mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-27 13:23:44 +09:00
a2dc818f21
This patch allows u-boot to expose the complete DDR region(s) to Linux (after subtracting the memory hidden via MEM_TOP_HIDE mechanism). This allows the u-boot to support the 48-bit VA support provided by ARM64 Linux in flavors 3.18 and above, by passing the appropriate 'memory' DTS nodes. Signed-off-by: Bhupesh Sharma <bhupesh.sharma at freescale.com> Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
28 lines
995 B
Plaintext
28 lines
995 B
Plaintext
Freescale ls2085a_emu
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This is a emulator target with limited peripherals.
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Memory map from core's view
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0x00_0000_0000 .. 0x00_000F_FFFF Boot Rom
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0x00_0100_0000 .. 0x00_0FFF_FFFF CCSR
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0x00_1800_0000 .. 0x00_181F_FFFF OCRAM
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0x00_3000_0000 .. 0x00_3FFF_FFFF IFC region #1
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0x00_8000_0000 .. 0x00_FFFF_FFFF DDR region #1
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0x05_1000_0000 .. 0x05_FFFF_FFFF IFC region #2
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0x80_8000_0000 .. 0xFF_FFFF_FFFF DDR region #2
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Other addresses are either reserved, or not used directly by u-boot.
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This list should be updated when more addresses are used.
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Booting Linux flavors which do not support 48-bit VA (< Linux 3.18)
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-------------------------------------------------------------------
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One needs to use appropriate bootargs to boot Linux flavors which do
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not support 48-bit VA (for e.g. < Linux 3.18) by appending mem=2048M, as shown
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below:
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=> setenv bootargs 'console=ttyS1,115200 root=/dev/ram
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earlycon=uart8250,mmio,0x21c0600,115200 default_hugepagesz=2m hugepagesz=2m
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hugepages=16 mem=2048M'
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