LXR qemu/include/hw/char/riscv

   1/*
   2 * QEMU RISCV Host Target Interface (HTIF) Emulation
   3 *
   4 * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
   5 * Copyright (c) 2017-2018 SiFive, Inc.
   6 *
   7 * This program is free software; you can redistribute it and/or modify it
   8 * under the terms and conditions of the GNU General Public License,
   9 * version 2 or later, as published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope it will be useful, but WITHOUT
  12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14 * more details.
  15 *
  16 * You should have received a copy of the GNU General Public License along with
  17 * this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#ifndef HW_RISCV_HTIF_H
  21#define HW_RISCV_HTIF_H
  22
  23#include "chardev/char.h"
  24#include "chardev/char-fe.h"
  25#include "exec/memory.h"
  26#include "target/riscv/cpu.h"
  27
  28#define TYPE_HTIF_UART "riscv.htif.uart"
  29
  30typedef struct HTIFState {
  31    int allow_tohost;
  32    int fromhost_inprogress;
  33
  34    hwaddr tohost_offset;
  35    hwaddr fromhost_offset;
  36    uint64_t tohost_size;
  37    uint64_t fromhost_size;
  38    MemoryRegion mmio;
  39    MemoryRegion *address_space;
  40    MemoryRegion *main_mem;
  41    void *main_mem_ram_ptr;
  42
  43    CPURISCVState *env;
  44    CharBackend chr;
  45    uint64_t pending_read;
  46} HTIFState;
  47
  48extern const VMStateDescription vmstate_htif;
  49extern const MemoryRegionOps htif_io_ops;
  50
  51/* HTIF symbol callback */
  52void htif_symbol_callback(const char *st_name, int st_info, uint64_t st_value,
  53    uint64_t st_size);
  54
  55/* legacy pre qom */
  56HTIFState *htif_mm_init(MemoryRegion *address_space, MemoryRegion *main_mem,
  57    CPURISCVState *env, Chardev *chr);
  58
  59#endif
  60