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The non-IRQ stack is moved to near the end of the SRAM C, which is very
high, and have no need to save.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

Signed-off-by: Priit Laes <plaes@plaes.org>

The watchdog register isn't in the same place, nor uses the same values
to trigger a reset.
Signed-off-by: Karl Palsson <karlp@tweak.net.au>

The watchdog register isn't in the same place, nor uses the same values
to trigger a reset.
Signed-off-by: Karl Palsson <karlp@tweak.net.au>

Allwinner H6 is a new SoC with its memory map changed.

Add its SoC info, including SRAM addresses and SID address.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Andre Przywara <osp@andrep.de>

As per the wiki[1] set ttbr0 to 0x44000 to enable the MMU. Transfer
speed is increased from 191KB/s to ~800KB/s which is handy when
transferring larger kernels and root filesystems.

Tested on a custom H8/A83T board.

[1] https://linux-sunxi.org/FEL/USBBoot

Use a hardwired L.NOP instruction from the OpenRISC reset
vector as a way to check if the workaround is necessary.
Because these L.NOP instructions are guaranteed to be there
and are read-only, this is the most reliable non-invasive test.

Reading SID would be less reliable because it is one-time
programmable and theoretically may be set to zero on some boards.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>

H3 SID controller has some bug, that makes the initial value at
0x01c14200 wrong.

This commit workarounds this bug by reading them with register access
first.
Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Reviewed-by: Bernhard Nortmann <bernhard.nortmann@web.de>

This is a preparatory step. Instead of using memory-based access,
we might want to retrieve SID keys (e-fuses) via SID registers.
For this, it's convenient if the plain base address is available.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

The V3s SoC looks like A10/13/20 in SRAM mapping and SID address.

Add support for it.
Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>

Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

open_fel_device() will automatically provide this member field,
based on the SoC ID from FEL/BROM version data. The field will
either receive a human-readable identifier, or the ID in 4-digit
hexadecimal representation (for unknown SoCs).
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

The SID block in the A80 is at 0x01c0e000, with the e-fuses we care
about at offset 0x200 within the block.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

The R40 is marketed as the successor to the A20. The SRAM layout is the
same as the A20, but there doesn't seem to be a secure SRAM block.

The SID block is at a completely different address. The layout is the
same as the newer SoCs, with the e-fuses at an offset of 0x200.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

Besides having fewer lines of code, the #define macros should
also prevent users from accidentally using these names without
braces (i.e. as function pointers). Instead, this will cause
compiler errors now.

soc_info.c: add "A10s" label in comment for SoC ID 0x1625.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>

While at it, modify the former "sram_info" identifiers
to carry a broader "soc_info" meaning.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>