include/hw/riscv/virt.h

   1 /*
   2  * QEMU RISC-V VirtIO machine interface
   3  *
   4  * Copyright (c) 2017 SiFive, Inc.
   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_RISCV_VIRT_H
  20 #define HW_RISCV_VIRT_H
  21
  22 #include "hw/boards.h"
  23 #include "hw/riscv/riscv_hart.h"
  24 #include "hw/sysbus.h"
  25 #include "hw/block/flash.h"
  26 #include "hw/intc/riscv_imsic.h"
  27
  28 #define VIRT_CPUS_MAX_BITS             9
  29 #define VIRT_CPUS_MAX                  (1 << VIRT_CPUS_MAX_BITS)
  30 #define VIRT_SOCKETS_MAX_BITS          2
  31 #define VIRT_SOCKETS_MAX               (1 << VIRT_SOCKETS_MAX_BITS)
  32
  33 #define TYPE_RISCV_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
  34 typedef struct RISCVVirtState RISCVVirtState;
  35 DECLARE_INSTANCE_CHECKER(RISCVVirtState, RISCV_VIRT_MACHINE,
  36                          TYPE_RISCV_VIRT_MACHINE)
  37
  38 typedef enum RISCVVirtAIAType {
  39     VIRT_AIA_TYPE_NONE = 0,
  40     VIRT_AIA_TYPE_APLIC,
  41     VIRT_AIA_TYPE_APLIC_IMSIC,
  42 } RISCVVirtAIAType;
  43
  44 struct RISCVVirtState {
  45     /*< private >*/
  46     MachineState parent;
  47
  48     /*< public >*/
  49     Notifier machine_done;
  50     DeviceState *platform_bus_dev;
  51     RISCVHartArrayState soc[VIRT_SOCKETS_MAX];
  52     DeviceState *irqchip[VIRT_SOCKETS_MAX];
  53     PFlashCFI01 *flash[2];
  54     FWCfgState *fw_cfg;
  55
  56     int fdt_size;
  57     bool have_aclint;
  58     RISCVVirtAIAType aia_type;
  59     int aia_guests;
  60     char *oem_id;
  61     char *oem_table_id;
  62     OnOffAuto acpi;
  63     const MemMapEntry *memmap;
  64     struct GPEXHost *gpex_host;
  65 };
  66
  67 enum {
  68     VIRT_DEBUG,
  69     VIRT_MROM,
  70     VIRT_TEST,
  71     VIRT_RTC,
  72     VIRT_CLINT,
  73     VIRT_ACLINT_SSWI,
  74     VIRT_PLIC,
  75     VIRT_APLIC_M,
  76     VIRT_APLIC_S,
  77     VIRT_UART0,
  78     VIRT_VIRTIO,
  79     VIRT_FW_CFG,
  80     VIRT_IMSIC_M,
  81     VIRT_IMSIC_S,
  82     VIRT_FLASH,
  83     VIRT_DRAM,
  84     VIRT_PCIE_MMIO,
  85     VIRT_PCIE_PIO,
  86     VIRT_PLATFORM_BUS,
  87     VIRT_PCIE_ECAM
  88 };
  89
  90 enum {
  91     UART0_IRQ = 10,
  92     RTC_IRQ = 11,
  93     VIRTIO_IRQ = 1, /* 1 to 8 */
  94     VIRTIO_COUNT = 8,
  95     PCIE_IRQ = 0x20, /* 32 to 35 */
  96     VIRT_PLATFORM_BUS_IRQ = 64, /* 64 to 95 */
  97 };
  98
  99 #define VIRT_PLATFORM_BUS_NUM_IRQS 32
 100
 101 #define VIRT_IRQCHIP_NUM_MSIS 255
 102 #define VIRT_IRQCHIP_NUM_SOURCES 96
 103 #define VIRT_IRQCHIP_NUM_PRIO_BITS 3
 104 #define VIRT_IRQCHIP_MAX_GUESTS_BITS 3
 105 #define VIRT_IRQCHIP_MAX_GUESTS ((1U << VIRT_IRQCHIP_MAX_GUESTS_BITS) - 1U)
 106
 107 #define VIRT_PLIC_PRIORITY_BASE 0x00
 108 #define VIRT_PLIC_PENDING_BASE 0x1000
 109 #define VIRT_PLIC_ENABLE_BASE 0x2000
 110 #define VIRT_PLIC_ENABLE_STRIDE 0x80
 111 #define VIRT_PLIC_CONTEXT_BASE 0x200000
 112 #define VIRT_PLIC_CONTEXT_STRIDE 0x1000
 113 #define VIRT_PLIC_SIZE(__num_context) \
 114     (VIRT_PLIC_CONTEXT_BASE + (__num_context) * VIRT_PLIC_CONTEXT_STRIDE)
 115
 116 #define FDT_PCI_ADDR_CELLS    3
 117 #define FDT_PCI_INT_CELLS     1
 118 #define FDT_PLIC_ADDR_CELLS   0
 119 #define FDT_PLIC_INT_CELLS    1
 120 #define FDT_APLIC_INT_CELLS   2
 121 #define FDT_IMSIC_INT_CELLS   0
 122 #define FDT_MAX_INT_CELLS     2
 123 #define FDT_MAX_INT_MAP_WIDTH (FDT_PCI_ADDR_CELLS + FDT_PCI_INT_CELLS + \
 124                                  1 + FDT_MAX_INT_CELLS)
 125 #define FDT_PLIC_INT_MAP_WIDTH  (FDT_PCI_ADDR_CELLS + FDT_PCI_INT_CELLS + \
 126                                  1 + FDT_PLIC_INT_CELLS)
 127 #define FDT_APLIC_INT_MAP_WIDTH (FDT_PCI_ADDR_CELLS + FDT_PCI_INT_CELLS + \
 128                                  1 + FDT_APLIC_INT_CELLS)
 129
 130 bool virt_is_acpi_enabled(RISCVVirtState *s);
 131 void virt_acpi_setup(RISCVVirtState *vms);
 132 uint32_t imsic_num_bits(uint32_t count);
 133
 134 /*
 135  * The virt machine physical address space used by some of the devices
 136  * namely ACLINT, PLIC, APLIC, and IMSIC depend on number of Sockets,
 137  * number of CPUs, and number of IMSIC guest files.
 138  *
 139  * Various limits defined by VIRT_SOCKETS_MAX_BITS, VIRT_CPUS_MAX_BITS,
 140  * and VIRT_IRQCHIP_MAX_GUESTS_BITS are tuned for maximum utilization
 141  * of virt machine physical address space.
 142  */
 143
 144 #define VIRT_IMSIC_GROUP_MAX_SIZE      (1U << IMSIC_MMIO_GROUP_MIN_SHIFT)
 145 #if VIRT_IMSIC_GROUP_MAX_SIZE < \
 146     IMSIC_GROUP_SIZE(VIRT_CPUS_MAX_BITS, VIRT_IRQCHIP_MAX_GUESTS_BITS)
 147 #error "Can't accomodate single IMSIC group in address space"
 148 #endif
 149
 150 #define VIRT_IMSIC_MAX_SIZE            (VIRT_SOCKETS_MAX * \
 151                                         VIRT_IMSIC_GROUP_MAX_SIZE)
 152 #if 0x4000000 < VIRT_IMSIC_MAX_SIZE
 153 #error "Can't accomodate all IMSIC groups in address space"
 154 #endif
 155
 156 #endif