u-boot.git/arch/riscv/lib, branch master

riscv: Drop USE_SPL_FIT_GENERATOR

2021-05-19T09:01:51+00:00

Now that we have switched to binman to generate u-boot.itb for all
RISC-V boards, USE_SPL_FIT_GENERATOR is no longer needed and can
be dropped.

Signed-off-by: Bin Meng 
Reviewed-by: Simon Glass

riscv: Fix memmove and optimise memcpy when misalign

2021-05-17T08:47:33+00:00

At present U-Boot SPL fails to boot on SiFive Unleashed board, due
to a load address misaligned exception happens when loading the FIT
image in spl_load_simple_fit(). The exception happens in memmove()
which is called by fdt_splice_().

Commit 8f0dc4cfd106 introduces an assembly version of memmove but
it does take misalignment into account (it checks if length is a
multiple of machine word size but pointers need also be aligned).
As a result it will generate misaligned load/store for the majority
of cases and causes significant performance regression on hardware
that traps misaligned load/store and emulate them using firmware.

The current behaviour of memcpy is that it checks if both src and
dest pointers are co-aligned (aka congruent modular SZ_REG). If
aligned, it will copy data word-by-word after first aligning
pointers to word boundary. If src and dst are not co-aligned,
however, byte-wise copy will be performed.

This patch was taken from the Linux kernel patch [1], which has not
been applied at the time being. It fixes the memmove and optimises
memcpy for misaligned cases. It will first align destination pointer
to word-boundary regardless whether src and dest are co-aligned or
not. If they indeed are, then wordwise copy is performed. If they
are not co-aligned, then it will load two adjacent words from src
and use shifts to assemble a full machine word. Some additional
assembly level micro-optimisation is also performed to ensure more
instructions can be compressed (e.g. prefer a0 to t6).

With this patch, U-Boot boots again on SiFive Unleashed board.

[1] https://patchwork.kernel.org/project/linux-riscv/patch/20210216225555.4976-1-gary@garyguo.net/

Fixes: 8f0dc4cfd106 ("riscv: assembler versions of memcpy, memmove, memset")
Signed-off-by: Bin Meng

riscv: Fix arch_fixup_fdt always failing without /chosen

2021-05-17T08:46:33+00:00

If /chosen was missing, chosen_offset would never get updated with the new
/chosen node. This would cause fdt_setprop_u32 to fail. This patch fixes
this by setting chosen_offset. In addition, log any errors from setting
boot-hartid as well.

Fixes: 5370478d1c7 ("riscv: Add boot hartid to device tree")
Signed-off-by: Sean Anderson 
Reviewed-by: Bin Meng 
Reviewed-by: Rick Chen 
Reviewed-by: Atish Patra

riscv: Split SiFive CLINT support between SPL and U-Boot proper

2021-05-17T08:42:24+00:00

At present there is only one Kconfig option CONFIG_SIFIVE_CLINT to
control the enabling of SiFive CLINT support in both SPL (M-mode)
and U-Boot proper (S-mode). So for a typical SPL config that the
SiFive CLINT driver is enabled in both SPL and U-Boot proper, that
means the S-mode U-Boot tries to access the memory-mapped CLINT
registers directly, instead of the normal 'rdtime' instruction.

This was not a problem before, as the hardware does not forbid the
access from S-mode. However this becomes an issue now with OpenSBI
commit 8b569803475e ("lib: utils/sys: Add CLINT memregion in the root domain")
that the SiFive CLINT register space is protected by PMP for M-mode
access only. U-Boot proper does not boot any more with the latest
OpenSBI, that access exceptions are fired forever from U-Boot when
trying to read the timer value via the SiFive CLINT driver in U-Boot.

To solve this, we need to split current SiFive CLINT support between
SPL and U-Boot proper, using 2 separate Kconfig options.

Signed-off-by: Bin Meng 
Reviewed-by: Sean Anderson

Add support for stack-protector

2021-04-20T11:31:12+00:00

Add support for stack protector for UBOOT, SPL, and TPL
as well as new pytest for stackprotector

Signed-off-by: Joel Peshkin 

Adjust UEFI build flags.
Signed-off-by: Heinrich Schuchardt

riscv: assembler versions of memcpy, memmove, memset

2021-04-08T07:37:29+00:00

Provide optimized versions of memcpy(), memmove(), memset() copied from
the Linux kernel.

Signed-off-by: Heinrich Schuchardt 
Reviewed-by: Leo Yu-Chi Liang

riscv: simplify longjmp

2021-04-08T07:37:29+00:00

The value returned by setjmp must be nonzero. If zero is passed as
parameter it must be replaced by 1.

This patch reduces the code size a bit.

Signed-off-by: Heinrich Schuchardt 
Reviewed-by: Sean Anderson 
Reviewed-by: Leo Yu-Chi Liang

common: Drop asm/global_data.h from common header

2021-02-02T20:33:42+00:00

Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include  at all, so
remove that include.

Signed-off-by: Simon Glass 
Signed-off-by: Tom Rini

Merge tag 'dm-pull-5jan21' of git://git.denx.de/u-boot-dm into next

2021-01-06T03:34:43+00:00

Driver model: make some udevice fields private
Driver model: Rename U_BOOT_DEVICE et al.
dtoc: Tidy up and add more tests
ns16550 code clean-up
x86 and sandbox minor fixes for of-platdata
dtoc prepration for adding build-time instantiation

dm: Rename DM_GET_DRIVER() to DM_DRIVER_GET()

2021-01-05T19:26:35+00:00

In the spirit of using the same base name for all of these related macros,
rename this to have the operation at the end. This is not widely used so
the impact is fairly small.

Signed-off-by: Simon Glass