include/hw/riscv/riscv_htif.h

   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 "hw/hw.h"
  24 #include "chardev/char.h"
  25 #include "chardev/char-fe.h"
  26 #include "sysemu/sysemu.h"
  27 #include "exec/memory.h"
  28 #include "target/riscv/cpu.h"
  29
  30 #define TYPE_HTIF_UART "riscv.htif.uart"
  31
  32 typedef struct HTIFState {
  33     int allow_tohost;
  34     int fromhost_inprogress;
  35
  36     hwaddr tohost_offset;
  37     hwaddr fromhost_offset;
  38     uint64_t tohost_size;
  39     uint64_t fromhost_size;
  40     MemoryRegion mmio;
  41     MemoryRegion *address_space;
  42     MemoryRegion *main_mem;
  43     void *main_mem_ram_ptr;
  44
  45     CPURISCVState *env;
  46     CharBackend chr;
  47     uint64_t pending_read;
  48 } HTIFState;
  49
  50 extern const VMStateDescription vmstate_htif;
  51 extern const MemoryRegionOps htif_io_ops;
  52
  53 /* HTIF symbol callback */
  54 void htif_symbol_callback(const char *st_name, int st_info, uint64_t st_value,
  55     uint64_t st_size);
  56
  57 /* legacy pre qom */
  58 HTIFState *htif_mm_init(MemoryRegion *address_space, MemoryRegion *main_mem,
  59     CPURISCVState *env, Chardev *chr);
  60
  61 #endif