| 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 "system/memory.h" |
| 26 | |
| 27 | #define TYPE_HTIF_UART "riscv.htif.uart" |
| 28 | |
| 29 | typedef struct HTIFState { |
| 30 | int allow_tohost; |
| 31 | int fromhost_inprogress; |
| 32 | |
| 33 | uint64_t tohost; |
| 34 | uint64_t fromhost; |
| 35 | hwaddr tohost_offset; |
| 36 | hwaddr fromhost_offset; |
| 37 | MemoryRegion mmio; |
| 38 | |
| 39 | CharFrontend chr; |
| 40 | uint64_t pending_read; |
| 41 | } HTIFState; |
| 42 | |
| 43 | extern const char *sig_file; |
| 44 | extern uint8_t line_size; |
| 45 | |
| 46 | /* HTIF symbol callback */ |
| 47 | void htif_symbol_callback(const char *st_name, int st_info, uint64_t st_value, |
| 48 | uint64_t st_size); |
| 49 | |
| 50 | /* legacy pre qom */ |
| 51 | HTIFState *htif_mm_init(MemoryRegion *address_space, Chardev *chr, |
| 52 | uint64_t nonelf_base, bool custom_base); |
| 53 | |
| 54 | #endif |