u-boot.git/arch/riscv/include/asm/encoding.h, branch next

arch/riscv: Remove unused macro in encoding.h

2025-09-19T11:23:17+00:00

This patch remove the unused macro DRAM_BASE.

Signed-off-by: Greentime Hu 
Reviewed-by: Leo Yu-Chi Liang

global: Finish CONFIG -> CFG migration

2023-01-20T17:27:24+00:00

At this point, the remaining places where we have a symbol that is
defined as CONFIG_... are in fairly odd locations. While as much dead
code has been removed as possible, some of these locations are simply
less obvious at first. In other cases, this code is used, but was
defined in such a way as to have been missed by earlier checks.  Perform
a rename of all such remaining symbols to be CFG_... rather than
CONFIG_...

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

common: Drop linux/bitops.h from common header

2020-05-19T01:19:23+00:00

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass

riscv: add run mode configuration for SPL

2019-08-26T08:07:42+00:00

U-Boot SPL can be run in a different privilege mode from U-Boot proper.
Add new configuration entries for SPL to allow the run mode to be
configured independently of U-Boot proper.

Extend all uses of the CONFIG_RISCV_SMODE and CONFIG_RISCV_MMODE
configuration symbols to also cover the SPL equivalents. Ensure that
files compatible with only one privilege mode are not included in builds
targeting an incompatible privilege mode.

Signed-off-by: Lukas Auer 
Reviewed-by: Bin Meng 
Tested-by: Bin Meng 
Reviewed-by: Anup Patel

riscv: Access CSRs using CSR numbers

2019-08-15T05:42:28+00:00

We should prefer accessing CSRs using their CSR numbers
because:
1. It compiles fine with older toolchains.
2. We can use latest CSR names in #define macro names of CSR
   numbers as-per RISC-V spec.
3. We can access newly added CSRs even if toolchain does not
   recognize newly added CSRs by name.

This commit is inspired from Linux kernel commit a3182c91ef4e
("RISC-V: Access CSRs using CSR numbers").

Signed-off-by: Bin Meng 
Reviewed-by: Rick Chen 
Reviewed-by: Anup Patel 
Reviewed-by: Lukas Auer

riscv: Add exception codes for xcause register

2018-12-18T01:56:27+00:00

This adds all exception codes in encoding.h.

Signed-off-by: Bin Meng 
Reviewed-by: Lukas Auer 
Reviewed-by: Anup Patel

riscv: Add CSR numbers

2018-12-18T01:56:27+00:00

The standard RISC-V ISA sets aside a 12-bit encoding space for up
to 4096 CSRs. This adds all known CSR numbers as defined in the
RISC-V Privileged Architecture Version 1.10.

Signed-off-by: Bin Meng 
Reviewed-by: Lukas Auer 
Reviewed-by: Anup Patel

riscv: Add kconfig option to run U-Boot in S-mode

2018-12-05T06:13:53+00:00

This patch adds kconfig option RISCV_SMODE to run U-Boot in
S-mode. When this opition is enabled we use s CSRs instead
of m CSRs.

It is important to note that there is no equivalent S-mode CSR
for misa and mhartid CSRs so we expect M-mode runtime firmware
(BBL or equivalent) to emulate misa and mhartid CSR read.

In-future, we will have more patches to avoid accessing misa and
mhartid CSRs from S-mode.

Signed-off-by: Anup Patel 
Reviewed-by: Bin Meng 
Tested-by: Bin Meng 
Reviewed-by: Lukas Auer

riscv: Remove CSR read/write defines in encoding.h

2018-10-03T09:48:02+00:00

There is no reason to keep two versions of CSR read/write defines
in encoding.h. We already have one set of defines in csr.h, which
is from Linux kernel, and let's drop the one in encoding.h.

Signed-off-by: Bin Meng 
Reviewed-by: Lukas Auer 
Reviewed-by: Rick Chen

SPDX: Convert all of our single license tags to Linux Kernel style

2018-05-07T13:34:12+00:00

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini