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[v2,0/2] riscv: cpu: Add support for cv1800b SoC

Message ID 20240309165533.48795-1-seashell11234455@gmail.com
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Series riscv: cpu: Add support for cv1800b SoC | expand

Message

Kongyang Liu March 9, 2024, 4:54 p.m. UTC 
This series add basic support for cv1800b SoC and enable dcache support.

The cv1800b utilizes CSR instructions to manipulate the first and second
bits in the MHCR register (0x7C1) to indicate the activation status of icache
and dcache. As the icache and dcache are already enabled in the FSBL
(first stage bootloader) provided by the vendor, and the U-Boot running in
S-Mode is unable to manipulate CSR registers, support for operations related
to enabling, disabling, or checking the status of the cache is not provided.

Changes in v2:
- Remove duplicate code in function cleanup_before_linux

Kongyang Liu (2):
  riscv: cpu: cv1800b: Add support for cv1800b SoC
  riscv: cache: Implement dcache for cv1800b

 arch/riscv/Kconfig              |  1 +
 arch/riscv/cpu/cv1800b/Kconfig  | 12 +++++++++
 arch/riscv/cpu/cv1800b/Makefile |  7 +++++
 arch/riscv/cpu/cv1800b/cache.c  | 45 +++++++++++++++++++++++++++++++++
 arch/riscv/cpu/cv1800b/cpu.c    |  9 +++++++
 arch/riscv/cpu/cv1800b/dram.c   | 21 +++++++++++++++
 board/sophgo/milkv_duo/Kconfig  |  4 +--
 7 files changed, 97 insertions(+), 2 deletions(-)
 create mode 100644 arch/riscv/cpu/cv1800b/Kconfig
 create mode 100644 arch/riscv/cpu/cv1800b/Makefile
 create mode 100644 arch/riscv/cpu/cv1800b/cache.c
 create mode 100644 arch/riscv/cpu/cv1800b/cpu.c
 create mode 100644 arch/riscv/cpu/cv1800b/dram.c