[PATCH v2 0/3] Add support for SBI v0.2

[Atish Patra]

The Supervisor Binary Interface(SBI) specification[1] now defines a
base extension that provides extendability to add future extensions
while maintaining backward compatibility with previous versions.
The new version is defined as 0.2 and older version is marked as 0.1.

This series adds support v0.2 and a unified calling convention
implementation between 0.1 and 0.2. It also adds minimal SBI functions
from 0.2 as well to keep the series lean. 

[1] https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.adoc

The SBI v0.2 support for OpenSBI is already available at

https://github.com/atishp04/opensbi/tree/sbi_v0.2_2
and in the OpenSBI mailing list.

Tested on both BBL, OpenSBI with/without the above patch series. 

Changes from v1->v2
1. Removed the legacy calling convention.
2. Moved all SBI related calls to sbi.c.
3. Moved all SBI related macros to uapi.

Atish Patra (3):
RISC-V: Mark existing SBI as 0.1 SBI.
RISC-V: Add basic support for SBI v0.2
RISC-V: Move SBI related macros under uapi.

arch/riscv/include/asm/sbi.h      | 109 +++++---------
arch/riscv/include/uapi/asm/sbi.h |  48 ++++++
arch/riscv/kernel/Makefile        |   1 +
arch/riscv/kernel/sbi.c           | 241 ++++++++++++++++++++++++++++++
arch/riscv/kernel/setup.c         |   2 +
5 files changed, 328 insertions(+), 73 deletions(-)
create mode 100644 arch/riscv/include/uapi/asm/sbi.h
create mode 100644 arch/riscv/kernel/sbi.c

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2.21.0