b79f300c1f
Introduce support for nonstandard noncoherent systems in the RISC-V architecture. It enables function pointer support to handle cache management in such systems. This patch adds a new configuration option called "RISCV_NONSTANDARD_CACHE_OPS." This option is a boolean flag that depends on "RISCV_DMA_NONCOHERENT" and enables the function pointer support for cache management in nonstandard noncoherent systems. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Tested-by: Conor Dooley <conor.dooley@microchip.com> # tyre-kicking on a d1 Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com> Tested-by: Emil Renner Berthing <emil.renner.berthing@canonical.com> # Link: https://lore.kernel.org/r/20230818135723.80612-4-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
29 lines
835 B
C
29 lines
835 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2023 Renesas Electronics Corp.
|
|
*/
|
|
|
|
#ifndef __ASM_DMA_NONCOHERENT_H
|
|
#define __ASM_DMA_NONCOHERENT_H
|
|
|
|
#include <linux/dma-direct.h>
|
|
|
|
/*
|
|
* struct riscv_nonstd_cache_ops - Structure for non-standard CMO function pointers
|
|
*
|
|
* @wback: Function pointer for cache writeback
|
|
* @inv: Function pointer for invalidating cache
|
|
* @wback_inv: Function pointer for flushing the cache (writeback + invalidating)
|
|
*/
|
|
struct riscv_nonstd_cache_ops {
|
|
void (*wback)(phys_addr_t paddr, size_t size);
|
|
void (*inv)(phys_addr_t paddr, size_t size);
|
|
void (*wback_inv)(phys_addr_t paddr, size_t size);
|
|
};
|
|
|
|
extern struct riscv_nonstd_cache_ops noncoherent_cache_ops;
|
|
|
|
void riscv_noncoherent_register_cache_ops(const struct riscv_nonstd_cache_ops *ops);
|
|
|
|
#endif /* __ASM_DMA_NONCOHERENT_H */
|