1 /* 2 * QEMU SiFive U PRCI (Power, Reset, Clock, Interrupt) interface 3 * 4 * Copyright (c) 2019 Bin Meng <bmeng.cn@gmail.com> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2 or later, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along with 16 * this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #ifndef HW_SIFIVE_U_PRCI_H 20 #define HW_SIFIVE_U_PRCI_H 21 #include "qom/object.h" 22 23 #define SIFIVE_U_PRCI_HFXOSCCFG 0x00 24 #define SIFIVE_U_PRCI_COREPLLCFG0 0x04 25 #define SIFIVE_U_PRCI_DDRPLLCFG0 0x0C 26 #define SIFIVE_U_PRCI_DDRPLLCFG1 0x10 27 #define SIFIVE_U_PRCI_GEMGXLPLLCFG0 0x1C 28 #define SIFIVE_U_PRCI_GEMGXLPLLCFG1 0x20 29 #define SIFIVE_U_PRCI_CORECLKSEL 0x24 30 #define SIFIVE_U_PRCI_DEVICESRESET 0x28 31 #define SIFIVE_U_PRCI_CLKMUXSTATUS 0x2C 32 33 /* 34 * Current FU540-C000 manual says ready bit is at bit 29, but 35 * freedom-u540-c000-bootloader codes (ux00prci.h) says it is at bit 31. 36 * We have to trust the actual code that works. 37 * 38 * see https://github.com/sifive/freedom-u540-c000-bootloader 39 */ 40 41 #define SIFIVE_U_PRCI_HFXOSCCFG_EN (1 << 30) 42 #define SIFIVE_U_PRCI_HFXOSCCFG_RDY (1 << 31) 43 44 /* xxxPLLCFG0 register bits */ 45 #define SIFIVE_U_PRCI_PLLCFG0_DIVR (1 << 0) 46 #define SIFIVE_U_PRCI_PLLCFG0_DIVF (31 << 6) 47 #define SIFIVE_U_PRCI_PLLCFG0_DIVQ (3 << 15) 48 #define SIFIVE_U_PRCI_PLLCFG0_FSE (1 << 25) 49 #define SIFIVE_U_PRCI_PLLCFG0_LOCK (1 << 31) 50 51 /* xxxPLLCFG1 register bits */ 52 #define SIFIVE_U_PRCI_PLLCFG1_CKE (1 << 24) 53 54 /* coreclksel register bits */ 55 #define SIFIVE_U_PRCI_CORECLKSEL_HFCLK (1 << 0) 56 57 58 #define SIFIVE_U_PRCI_REG_SIZE 0x1000 59 60 #define TYPE_SIFIVE_U_PRCI "riscv.sifive.u.prci" 61 62 typedef struct SiFiveUPRCIState SiFiveUPRCIState; 63 DECLARE_INSTANCE_CHECKER(SiFiveUPRCIState, SIFIVE_U_PRCI, 64 TYPE_SIFIVE_U_PRCI) 65 66 struct SiFiveUPRCIState { 67 /*< private >*/ 68 SysBusDevice parent_obj; 69 70 /*< public >*/ 71 MemoryRegion mmio; 72 uint32_t hfxosccfg; 73 uint32_t corepllcfg0; 74 uint32_t ddrpllcfg0; 75 uint32_t ddrpllcfg1; 76 uint32_t gemgxlpllcfg0; 77 uint32_t gemgxlpllcfg1; 78 uint32_t coreclksel; 79 uint32_t devicesreset; 80 uint32_t clkmuxstatus; 81 }; 82 83 /* 84 * Clock indexes for use by Device Tree data and the PRCI driver. 85 * 86 * These values are from sifive-fu540-prci.h in the Linux kernel. 87 */ 88 #define PRCI_CLK_COREPLL 0 89 #define PRCI_CLK_DDRPLL 1 90 #define PRCI_CLK_GEMGXLPLL 2 91 #define PRCI_CLK_TLCLK 3 92 93 #endif /* HW_SIFIVE_U_PRCI_H */ 94