cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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renesas-rpc-if.h (1905B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Renesas RPC-IF core driver
      4 *
      5 * Copyright (C) 2018~2019 Renesas Solutions Corp.
      6 * Copyright (C) 2019 Macronix International Co., Ltd.
      7 * Copyright (C) 2019-2020 Cogent Embedded, Inc.
      8 */
      9
     10#ifndef __RENESAS_RPC_IF_H
     11#define __RENESAS_RPC_IF_H
     12
     13#include <linux/pm_runtime.h>
     14#include <linux/types.h>
     15
     16enum rpcif_data_dir {
     17	RPCIF_NO_DATA,
     18	RPCIF_DATA_IN,
     19	RPCIF_DATA_OUT,
     20};
     21
     22struct rpcif_op {
     23	struct {
     24		u8 buswidth;
     25		u8 opcode;
     26		bool ddr;
     27	} cmd, ocmd;
     28
     29	struct {
     30		u8 nbytes;
     31		u8 buswidth;
     32		bool ddr;
     33		u64 val;
     34	} addr;
     35
     36	struct {
     37		u8 ncycles;
     38		u8 buswidth;
     39	} dummy;
     40
     41	struct {
     42		u8 nbytes;
     43		u8 buswidth;
     44		bool ddr;
     45		u32 val;
     46	} option;
     47
     48	struct {
     49		u8 buswidth;
     50		unsigned int nbytes;
     51		enum rpcif_data_dir dir;
     52		bool ddr;
     53		union {
     54			void *in;
     55			const void *out;
     56		} buf;
     57	} data;
     58};
     59
     60enum rpcif_type {
     61	RPCIF_RCAR_GEN3,
     62	RPCIF_RZ_G2L,
     63};
     64
     65struct rpcif {
     66	struct device *dev;
     67	void __iomem *base;
     68	void __iomem *dirmap;
     69	struct regmap *regmap;
     70	struct reset_control *rstc;
     71	size_t size;
     72	enum rpcif_type type;
     73	enum rpcif_data_dir dir;
     74	u8 bus_size;
     75	u8 xfer_size;
     76	void *buffer;
     77	u32 xferlen;
     78	u32 smcr;
     79	u32 smadr;
     80	u32 command;		/* DRCMR or SMCMR */
     81	u32 option;		/* DROPR or SMOPR */
     82	u32 enable;		/* DRENR or SMENR */
     83	u32 dummy;		/* DRDMCR or SMDMCR */
     84	u32 ddr;		/* DRDRENR or SMDRENR */
     85};
     86
     87int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
     88int rpcif_hw_init(struct rpcif *rpc, bool hyperflash);
     89void rpcif_prepare(struct rpcif *rpc, const struct rpcif_op *op, u64 *offs,
     90		   size_t *len);
     91int rpcif_manual_xfer(struct rpcif *rpc);
     92ssize_t rpcif_dirmap_read(struct rpcif *rpc, u64 offs, size_t len, void *buf);
     93
     94static inline void rpcif_enable_rpm(struct rpcif *rpc)
     95{
     96	pm_runtime_enable(rpc->dev);
     97}
     98
     99static inline void rpcif_disable_rpm(struct rpcif *rpc)
    100{
    101	pm_runtime_disable(rpc->dev);
    102}
    103
    104#endif // __RENESAS_RPC_IF_H