include/hw/misc/sifive_u_prci.h

   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
  22 #include "hw/sysbus.h"
  23
  24 #define SIFIVE_U_PRCI_HFXOSCCFG     0x00
  25 #define SIFIVE_U_PRCI_COREPLLCFG0   0x04
  26 #define SIFIVE_U_PRCI_DDRPLLCFG0    0x0C
  27 #define SIFIVE_U_PRCI_DDRPLLCFG1    0x10
  28 #define SIFIVE_U_PRCI_GEMGXLPLLCFG0 0x1C
  29 #define SIFIVE_U_PRCI_GEMGXLPLLCFG1 0x20
  30 #define SIFIVE_U_PRCI_CORECLKSEL    0x24
  31 #define SIFIVE_U_PRCI_DEVICESRESET  0x28
  32 #define SIFIVE_U_PRCI_CLKMUXSTATUS  0x2C
  33
  34 /*
  35  * Current FU540-C000 manual says ready bit is at bit 29, but
  36  * freedom-u540-c000-bootloader codes (ux00prci.h) says it is at bit 31.
  37  * We have to trust the actual code that works.
  38  *
  39  * see https://github.com/sifive/freedom-u540-c000-bootloader
  40  */
  41
  42 #define SIFIVE_U_PRCI_HFXOSCCFG_EN  (1 << 30)
  43 #define SIFIVE_U_PRCI_HFXOSCCFG_RDY (1 << 31)
  44
  45 /* xxxPLLCFG0 register bits */
  46 #define SIFIVE_U_PRCI_PLLCFG0_DIVR  (1 << 0)
  47 #define SIFIVE_U_PRCI_PLLCFG0_DIVF  (31 << 6)
  48 #define SIFIVE_U_PRCI_PLLCFG0_DIVQ  (3 << 15)
  49 #define SIFIVE_U_PRCI_PLLCFG0_FSE   (1 << 25)
  50 #define SIFIVE_U_PRCI_PLLCFG0_LOCK  (1 << 31)
  51
  52 /* xxxPLLCFG1 register bits */
  53 #define SIFIVE_U_PRCI_PLLCFG1_CKE   (1 << 24)
  54
  55 /* coreclksel register bits */
  56 #define SIFIVE_U_PRCI_CORECLKSEL_HFCLK  (1 << 0)
  57
  58
  59 #define SIFIVE_U_PRCI_REG_SIZE  0x1000
  60
  61 #define TYPE_SIFIVE_U_PRCI      "riscv.sifive.u.prci"
  62
  63 typedef struct SiFiveUPRCIState SiFiveUPRCIState;
  64 DECLARE_INSTANCE_CHECKER(SiFiveUPRCIState, SIFIVE_U_PRCI,
  65                          TYPE_SIFIVE_U_PRCI)
  66
  67 struct SiFiveUPRCIState {
  68     /*< private >*/
  69     SysBusDevice parent_obj;
  70
  71     /*< public >*/
  72     MemoryRegion mmio;
  73     uint32_t hfxosccfg;
  74     uint32_t corepllcfg0;
  75     uint32_t ddrpllcfg0;
  76     uint32_t ddrpllcfg1;
  77     uint32_t gemgxlpllcfg0;
  78     uint32_t gemgxlpllcfg1;
  79     uint32_t coreclksel;
  80     uint32_t devicesreset;
  81     uint32_t clkmuxstatus;
  82 };
  83
  84 /*
  85  * Clock indexes for use by Device Tree data and the PRCI driver.
  86  *
  87  * These values are from sifive-fu540-prci.h in the Linux kernel.
  88  */
  89 #define PRCI_CLK_COREPLL        0
  90 #define PRCI_CLK_DDRPLL         1
  91 #define PRCI_CLK_GEMGXLPLL      2
  92 #define PRCI_CLK_TLCLK          3
  93
  94 #endif /* HW_SIFIVE_U_PRCI_H */