1 /* 2 * QEMU RISC-V PMP (Physical Memory Protection) 3 * 4 * Author: Daire McNamara, daire.mcnamara@emdalo.com 5 * Ivan Griffin, ivan.griffin@emdalo.com 6 * 7 * This provides a RISC-V Physical Memory Protection interface 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms and conditions of the GNU General Public License, 11 * version 2 or later, as published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope it will be useful, but WITHOUT 14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 16 * more details. 17 * 18 * You should have received a copy of the GNU General Public License along with 19 * this program. If not, see <http://www.gnu.org/licenses/>. 20 */ 21 22 #ifndef RISCV_PMP_H 23 #define RISCV_PMP_H 24 25 typedef enum { 26 PMP_READ = 1 << 0, 27 PMP_WRITE = 1 << 1, 28 PMP_EXEC = 1 << 2, 29 PMP_LOCK = 1 << 7 30 } pmp_priv_t; 31 32 typedef enum { 33 PMP_AMATCH_OFF, /* Null (off) */ 34 PMP_AMATCH_TOR, /* Top of Range */ 35 PMP_AMATCH_NA4, /* Naturally aligned four-byte region */ 36 PMP_AMATCH_NAPOT /* Naturally aligned power-of-two region */ 37 } pmp_am_t; 38 39 typedef enum { 40 MSECCFG_MML = 1 << 0, 41 MSECCFG_MMWP = 1 << 1, 42 MSECCFG_RLB = 1 << 2 43 } mseccfg_field_t; 44 45 typedef struct { 46 target_ulong addr_reg; 47 uint8_t cfg_reg; 48 } pmp_entry_t; 49 50 typedef struct { 51 target_ulong sa; 52 target_ulong ea; 53 } pmp_addr_t; 54 55 typedef struct { 56 pmp_entry_t pmp[MAX_RISCV_PMPS]; 57 pmp_addr_t addr[MAX_RISCV_PMPS]; 58 uint32_t num_rules; 59 } pmp_table_t; 60 61 void pmpcfg_csr_write(CPURISCVState *env, uint32_t reg_index, 62 target_ulong val); 63 target_ulong pmpcfg_csr_read(CPURISCVState *env, uint32_t reg_index); 64 65 void mseccfg_csr_write(CPURISCVState *env, target_ulong val); 66 target_ulong mseccfg_csr_read(CPURISCVState *env); 67 68 void pmpaddr_csr_write(CPURISCVState *env, uint32_t addr_index, 69 target_ulong val); 70 target_ulong pmpaddr_csr_read(CPURISCVState *env, uint32_t addr_index); 71 bool pmp_hart_has_privs(CPURISCVState *env, target_ulong addr, 72 target_ulong size, pmp_priv_t privs, pmp_priv_t *allowed_privs, 73 target_ulong mode); 74 bool pmp_is_range_in_tlb(CPURISCVState *env, hwaddr tlb_sa, 75 target_ulong *tlb_size); 76 void pmp_update_rule_addr(CPURISCVState *env, uint32_t pmp_index); 77 void pmp_update_rule_nums(CPURISCVState *env); 78 uint32_t pmp_get_num_rules(CPURISCVState *env); 79 int pmp_priv_to_page_prot(pmp_priv_t pmp_priv); 80 81 #define MSECCFG_MML_ISSET(env) get_field(env->mseccfg, MSECCFG_MML) 82 #define MSECCFG_MMWP_ISSET(env) get_field(env->mseccfg, MSECCFG_MMWP) 83 #define MSECCFG_RLB_ISSET(env) get_field(env->mseccfg, MSECCFG_RLB) 84 85 #endif 86