diff options
| author | Alistair Francis <alistair.francis@wdc.com> | 2022-04-28 09:41:43 +1000 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2022-04-29 10:48:31 +1000 |
| commit | 1832b7cb3f6450c2c98e5181c7688b8e753fe7fd (patch) | |
| tree | b67b7fbb563aad491fd1ed92383e0211830be7cc | |
| parent | d24a7bc24ec9201357f554f590d247582360e3cf (diff) | |
hw/riscv: virt: Create a platform bus
Create a platform bus to allow dynamic devices to be connected. This is
based on the ARM implementation.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-Id: <20220427234146.1130752-4-alistair.francis@opensource.wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
| -rw-r--r-- | hw/riscv/Kconfig | 1 | ||||
| -rw-r--r-- | hw/riscv/virt.c | 68 | ||||
| -rw-r--r-- | include/hw/riscv/virt.h | 7 |
3 files changed, 56 insertions, 20 deletions
diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig index 91bb9d21c4..da790f5936 100644 --- a/hw/riscv/Kconfig +++ b/hw/riscv/Kconfig @@ -48,6 +48,7 @@ config RISCV_VIRT select SIFIVE_TEST select VIRTIO_MMIO select FW_CFG_DMA + select PLATFORM_BUS config SIFIVE_E bool diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c index f849052c75..d99ea1c9fd 100644 --- a/hw/riscv/virt.c +++ b/hw/riscv/virt.c @@ -37,6 +37,7 @@ #include "hw/intc/riscv_imsic.h" #include "hw/intc/sifive_plic.h" #include "hw/misc/sifive_test.h" +#include "hw/platform-bus.h" #include "chardev/char.h" #include "sysemu/device_tree.h" #include "sysemu/sysemu.h" @@ -68,25 +69,26 @@ #endif static const MemMapEntry virt_memmap[] = { - [VIRT_DEBUG] = { 0x0, 0x100 }, - [VIRT_MROM] = { 0x1000, 0xf000 }, - [VIRT_TEST] = { 0x100000, 0x1000 }, - [VIRT_RTC] = { 0x101000, 0x1000 }, - [VIRT_CLINT] = { 0x2000000, 0x10000 }, - [VIRT_ACLINT_SSWI] = { 0x2F00000, 0x4000 }, - [VIRT_PCIE_PIO] = { 0x3000000, 0x10000 }, - [VIRT_PLIC] = { 0xc000000, VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 2) }, - [VIRT_APLIC_M] = { 0xc000000, APLIC_SIZE(VIRT_CPUS_MAX) }, - [VIRT_APLIC_S] = { 0xd000000, APLIC_SIZE(VIRT_CPUS_MAX) }, - [VIRT_UART0] = { 0x10000000, 0x100 }, - [VIRT_VIRTIO] = { 0x10001000, 0x1000 }, - [VIRT_FW_CFG] = { 0x10100000, 0x18 }, - [VIRT_FLASH] = { 0x20000000, 0x4000000 }, - [VIRT_IMSIC_M] = { 0x24000000, VIRT_IMSIC_MAX_SIZE }, - [VIRT_IMSIC_S] = { 0x28000000, VIRT_IMSIC_MAX_SIZE }, - [VIRT_PCIE_ECAM] = { 0x30000000, 0x10000000 }, - [VIRT_PCIE_MMIO] = { 0x40000000, 0x40000000 }, - [VIRT_DRAM] = { 0x80000000, 0x0 }, + [VIRT_DEBUG] = { 0x0, 0x100 }, + [VIRT_MROM] = { 0x1000, 0xf000 }, + [VIRT_TEST] = { 0x100000, 0x1000 }, + [VIRT_RTC] = { 0x101000, 0x1000 }, + [VIRT_CLINT] = { 0x2000000, 0x10000 }, + [VIRT_ACLINT_SSWI] = { 0x2F00000, 0x4000 }, + [VIRT_PCIE_PIO] = { 0x3000000, 0x10000 }, + [VIRT_PLATFORM_BUS] = { 0x4000000, 0x2000000 }, + [VIRT_PLIC] = { 0xc000000, VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 2) }, + [VIRT_APLIC_M] = { 0xc000000, APLIC_SIZE(VIRT_CPUS_MAX) }, + [VIRT_APLIC_S] = { 0xd000000, APLIC_SIZE(VIRT_CPUS_MAX) }, + [VIRT_UART0] = { 0x10000000, 0x100 }, + [VIRT_VIRTIO] = { 0x10001000, 0x1000 }, + [VIRT_FW_CFG] = { 0x10100000, 0x18 }, + [VIRT_FLASH] = { 0x20000000, 0x4000000 }, + [VIRT_IMSIC_M] = { 0x24000000, VIRT_IMSIC_MAX_SIZE }, + [VIRT_IMSIC_S] = { 0x28000000, VIRT_IMSIC_MAX_SIZE }, + [VIRT_PCIE_ECAM] = { 0x30000000, 0x10000000 }, + [VIRT_PCIE_MMIO] = { 0x40000000, 0x40000000 }, + [VIRT_DRAM] = { 0x80000000, 0x0 }, }; /* PCIe high mmio is fixed for RV32 */ @@ -1162,6 +1164,32 @@ static DeviceState *virt_create_aia(RISCVVirtAIAType aia_type, int aia_guests, return aplic_m; } +static void create_platform_bus(RISCVVirtState *s, DeviceState *irqchip) +{ + DeviceState *dev; + SysBusDevice *sysbus; + const MemMapEntry *memmap = virt_memmap; + int i; + MemoryRegion *sysmem = get_system_memory(); + + dev = qdev_new(TYPE_PLATFORM_BUS_DEVICE); + dev->id = g_strdup(TYPE_PLATFORM_BUS_DEVICE); + qdev_prop_set_uint32(dev, "num_irqs", VIRT_PLATFORM_BUS_NUM_IRQS); + qdev_prop_set_uint32(dev, "mmio_size", memmap[VIRT_PLATFORM_BUS].size); + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); + s->platform_bus_dev = dev; + + sysbus = SYS_BUS_DEVICE(dev); + for (i = 0; i < VIRT_PLATFORM_BUS_NUM_IRQS; i++) { + int irq = VIRT_PLATFORM_BUS_IRQ + i; + sysbus_connect_irq(sysbus, i, qdev_get_gpio_in(irqchip, irq)); + } + + memory_region_add_subregion(sysmem, + memmap[VIRT_PLATFORM_BUS].base, + sysbus_mmio_get_region(sysbus, 0)); +} + static void virt_machine_done(Notifier *notifier, void *data) { RISCVVirtState *s = container_of(notifier, RISCVVirtState, @@ -1418,6 +1446,8 @@ static void virt_machine_init(MachineState *machine) memmap[VIRT_PCIE_PIO].base, DEVICE(pcie_irqchip)); + create_platform_bus(s, DEVICE(mmio_irqchip)); + serial_mm_init(system_memory, memmap[VIRT_UART0].base, 0, qdev_get_gpio_in(DEVICE(mmio_irqchip), UART0_IRQ), 399193, serial_hd(0), DEVICE_LITTLE_ENDIAN); diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h index 8b8db3fb7c..984e55c77f 100644 --- a/include/hw/riscv/virt.h +++ b/include/hw/riscv/virt.h @@ -46,6 +46,7 @@ struct RISCVVirtState { /*< public >*/ Notifier machine_done; + DeviceState *platform_bus_dev; RISCVHartArrayState soc[VIRT_SOCKETS_MAX]; DeviceState *irqchip[VIRT_SOCKETS_MAX]; PFlashCFI01 *flash[2]; @@ -76,6 +77,7 @@ enum { VIRT_DRAM, VIRT_PCIE_MMIO, VIRT_PCIE_PIO, + VIRT_PLATFORM_BUS, VIRT_PCIE_ECAM }; @@ -85,9 +87,12 @@ enum { VIRTIO_IRQ = 1, /* 1 to 8 */ VIRTIO_COUNT = 8, PCIE_IRQ = 0x20, /* 32 to 35 */ - VIRTIO_NDEV = 0x35 /* Arbitrary maximum number of interrupts */ + VIRT_PLATFORM_BUS_IRQ = 64, /* 64 to 96 */ + VIRTIO_NDEV = 96 /* Arbitrary maximum number of interrupts */ }; +#define VIRT_PLATFORM_BUS_NUM_IRQS 32 + #define VIRT_IRQCHIP_IPI_MSI 1 #define VIRT_IRQCHIP_NUM_MSIS 255 #define VIRT_IRQCHIP_NUM_SOURCES VIRTIO_NDEV |