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 62