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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ipc.h (1521B)

      1/* SPDX-License-Identifier: GPL-2.0+ */
      2/*
      3 * Copyright 2018 NXP
      4 *
      5 * Header file for the IPC implementation.
      6 */
      7
      8#ifndef _SC_IPC_H
      9#define _SC_IPC_H
     10
     11#include <linux/device.h>
     12#include <linux/types.h>
     13
     14#define IMX_SC_RPC_VERSION	1
     15#define IMX_SC_RPC_MAX_MSG	8
     16
     17struct imx_sc_ipc;
     18
     19enum imx_sc_rpc_svc {
     20	IMX_SC_RPC_SVC_UNKNOWN = 0,
     21	IMX_SC_RPC_SVC_RETURN = 1,
     22	IMX_SC_RPC_SVC_PM = 2,
     23	IMX_SC_RPC_SVC_RM = 3,
     24	IMX_SC_RPC_SVC_TIMER = 5,
     25	IMX_SC_RPC_SVC_PAD = 6,
     26	IMX_SC_RPC_SVC_MISC = 7,
     27	IMX_SC_RPC_SVC_IRQ = 8,
     28};
     29
     30struct imx_sc_rpc_msg {
     31	uint8_t ver;
     32	uint8_t size;
     33	uint8_t svc;
     34	uint8_t func;
     35};
     36
     37#ifdef CONFIG_IMX_SCU
     38/*
     39 * This is an function to send an RPC message over an IPC channel.
     40 * It is called by client-side SCFW API function shims.
     41 *
     42 * @param[in]     ipc         IPC handle
     43 * @param[in,out] msg         handle to a message
     44 * @param[in]     have_resp   response flag
     45 *
     46 * If have_resp is true then this function waits for a response
     47 * and returns the result in msg.
     48 */
     49int imx_scu_call_rpc(struct imx_sc_ipc *ipc, void *msg, bool have_resp);
     50
     51/*
     52 * This function gets the default ipc handle used by SCU
     53 *
     54 * @param[out]	ipc	sc ipc handle
     55 *
     56 * @return Returns an error code (0 = success, failed if < 0)
     57 */
     58int imx_scu_get_handle(struct imx_sc_ipc **ipc);
     59#else
     60static inline int imx_scu_call_rpc(struct imx_sc_ipc *ipc, void *msg,
     61				   bool have_resp)
     62{
     63	return -ENOTSUPP;
     64}
     65
     66static inline int imx_scu_get_handle(struct imx_sc_ipc **ipc)
     67{
     68	return -ENOTSUPP;
     69}
     70#endif
     71#endif /* _SC_IPC_H */