diff options
| -rw-r--r-- | default-configs/riscv32-softmmu.mak | 5 | ||||
| -rw-r--r-- | default-configs/riscv64-softmmu.mak | 5 | ||||
| -rw-r--r-- | hw/riscv/virt.c | 131 | ||||
| -rw-r--r-- | include/hw/riscv/virt.h | 13 |
4 files changed, 150 insertions, 4 deletions
diff --git a/default-configs/riscv32-softmmu.mak b/default-configs/riscv32-softmmu.mak index 7937c69..c5ea36c 100644 --- a/default-configs/riscv32-softmmu.mak +++ b/default-configs/riscv32-softmmu.mak @@ -1,7 +1,10 @@ # Default configuration for riscv-softmmu +include pci.mak + CONFIG_SERIAL=y CONFIG_VIRTIO_MMIO=y -include virtio.mak CONFIG_CADENCE=y + +CONFIG_PCI_GENERIC=y diff --git a/default-configs/riscv64-softmmu.mak b/default-configs/riscv64-softmmu.mak index 7937c69..c5ea36c 100644 --- a/default-configs/riscv64-softmmu.mak +++ b/default-configs/riscv64-softmmu.mak @@ -1,7 +1,10 @@ # Default configuration for riscv-softmmu +include pci.mak + CONFIG_SERIAL=y CONFIG_VIRTIO_MMIO=y -include virtio.mak CONFIG_CADENCE=y + +CONFIG_PCI_GENERIC=y diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c index 6b6fa39..e7f0716 100644 --- a/hw/riscv/virt.c +++ b/hw/riscv/virt.c @@ -39,6 +39,8 @@ #include "sysemu/arch_init.h" #include "sysemu/device_tree.h" #include "exec/address-spaces.h" +#include "hw/pci/pci.h" +#include "hw/pci-host/gpex.h" #include "elf.h" #include <libfdt.h> @@ -55,6 +57,9 @@ static const struct MemmapEntry { [VIRT_UART0] = { 0x10000000, 0x100 }, [VIRT_VIRTIO] = { 0x10001000, 0x1000 }, [VIRT_DRAM] = { 0x80000000, 0x0 }, + [VIRT_PCIE_MMIO] = { 0x40000000, 0x40000000 }, + [VIRT_PCIE_PIO] = { 0x03000000, 0x00010000 }, + [VIRT_PCIE_ECAM] = { 0x30000000, 0x10000000 }, }; static uint64_t load_kernel(const char *kernel_filename) @@ -98,6 +103,51 @@ static hwaddr load_initrd(const char *filename, uint64_t mem_size, return *start + size; } +static void create_pcie_irq_map(void *fdt, char *nodename, + uint32_t plic_phandle) +{ + int pin, dev; + uint32_t + full_irq_map[GPEX_NUM_IRQS * GPEX_NUM_IRQS * FDT_INT_MAP_WIDTH] = {}; + uint32_t *irq_map = full_irq_map; + + /* This code creates a standard swizzle of interrupts such that + * each device's first interrupt is based on it's PCI_SLOT number. + * (See pci_swizzle_map_irq_fn()) + * + * We only need one entry per interrupt in the table (not one per + * possible slot) seeing the interrupt-map-mask will allow the table + * to wrap to any number of devices. + */ + for (dev = 0; dev < GPEX_NUM_IRQS; dev++) { + int devfn = dev * 0x8; + + for (pin = 0; pin < GPEX_NUM_IRQS; pin++) { + int irq_nr = PCIE_IRQ + ((pin + PCI_SLOT(devfn)) % GPEX_NUM_IRQS); + int i = 0; + + irq_map[i] = cpu_to_be32(devfn << 8); + + i += FDT_PCI_ADDR_CELLS; + irq_map[i] = cpu_to_be32(pin + 1); + + i += FDT_PCI_INT_CELLS; + irq_map[i++] = cpu_to_be32(plic_phandle); + + i += FDT_PLIC_ADDR_CELLS; + irq_map[i] = cpu_to_be32(irq_nr); + + irq_map += FDT_INT_MAP_WIDTH; + } + } + + qemu_fdt_setprop(fdt, nodename, "interrupt-map", + full_irq_map, sizeof(full_irq_map)); + + qemu_fdt_setprop_cells(fdt, nodename, "interrupt-map-mask", + 0x1800, 0, 0, 0x7); +} + static void *create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap, uint64_t mem_size, const char *cmdline) { @@ -203,7 +253,10 @@ static void *create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap, nodename = g_strdup_printf("/soc/interrupt-controller@%lx", (long)memmap[VIRT_PLIC].base); qemu_fdt_add_subnode(fdt, nodename); - qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", 1); + qemu_fdt_setprop_cells(fdt, nodename, "#address-cells", + FDT_PLIC_ADDR_CELLS); + qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", + FDT_PLIC_INT_CELLS); qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,plic0"); qemu_fdt_setprop(fdt, nodename, "interrupt-controller", NULL, 0); qemu_fdt_setprop(fdt, nodename, "interrupts-extended", @@ -233,6 +286,33 @@ static void *create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap, g_free(nodename); } + nodename = g_strdup_printf("/soc/pci@%lx", + (long) memmap[VIRT_PCIE_ECAM].base); + qemu_fdt_add_subnode(fdt, nodename); + qemu_fdt_setprop_cells(fdt, nodename, "#address-cells", + FDT_PCI_ADDR_CELLS); + qemu_fdt_setprop_cells(fdt, nodename, "#interrupt-cells", + FDT_PCI_INT_CELLS); + qemu_fdt_setprop_cells(fdt, nodename, "#size-cells", 0x2); + qemu_fdt_setprop_string(fdt, nodename, "compatible", + "pci-host-ecam-generic"); + qemu_fdt_setprop_string(fdt, nodename, "device_type", "pci"); + qemu_fdt_setprop_cell(fdt, nodename, "linux,pci-domain", 0); + qemu_fdt_setprop_cells(fdt, nodename, "bus-range", 0, + memmap[VIRT_PCIE_ECAM].base / + PCIE_MMCFG_SIZE_MIN - 1); + qemu_fdt_setprop(fdt, nodename, "dma-coherent", NULL, 0); + qemu_fdt_setprop_cells(fdt, nodename, "reg", 0, memmap[VIRT_PCIE_ECAM].base, + 0, memmap[VIRT_PCIE_ECAM].size); + qemu_fdt_setprop_sized_cells(fdt, nodename, "ranges", + 1, FDT_PCI_RANGE_IOPORT, 2, 0, + 2, memmap[VIRT_PCIE_PIO].base, 2, memmap[VIRT_PCIE_PIO].size, + 1, FDT_PCI_RANGE_MMIO, + 2, memmap[VIRT_PCIE_MMIO].base, + 2, memmap[VIRT_PCIE_MMIO].base, 2, memmap[VIRT_PCIE_MMIO].size); + create_pcie_irq_map(fdt, nodename, plic_phandle); + g_free(nodename); + nodename = g_strdup_printf("/test@%lx", (long)memmap[VIRT_TEST].base); qemu_fdt_add_subnode(fdt, nodename); @@ -263,6 +343,47 @@ static void *create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap, return fdt; } + +static inline DeviceState *gpex_pcie_init(MemoryRegion *sys_mem, + hwaddr ecam_base, hwaddr ecam_size, + hwaddr mmio_base, hwaddr mmio_size, + hwaddr pio_base, + DeviceState *plic, bool link_up) +{ + DeviceState *dev; + MemoryRegion *ecam_alias, *ecam_reg; + MemoryRegion *mmio_alias, *mmio_reg; + qemu_irq irq; + int i; + + dev = qdev_create(NULL, TYPE_GPEX_HOST); + + qdev_init_nofail(dev); + + ecam_alias = g_new0(MemoryRegion, 1); + ecam_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0); + memory_region_init_alias(ecam_alias, OBJECT(dev), "pcie-ecam", + ecam_reg, 0, ecam_size); + memory_region_add_subregion(get_system_memory(), ecam_base, ecam_alias); + + mmio_alias = g_new0(MemoryRegion, 1); + mmio_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 1); + memory_region_init_alias(mmio_alias, OBJECT(dev), "pcie-mmio", + mmio_reg, mmio_base, mmio_size); + memory_region_add_subregion(get_system_memory(), mmio_base, mmio_alias); + + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 2, pio_base); + + for (i = 0; i < GPEX_NUM_IRQS; i++) { + irq = qdev_get_gpio_in(plic, PCIE_IRQ + i); + + sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, irq); + gpex_set_irq_num(GPEX_HOST(dev), i, PCIE_IRQ + i); + } + + return dev; +} + static void riscv_virt_board_init(MachineState *machine) { const struct MemmapEntry *memmap = virt_memmap; @@ -385,6 +506,14 @@ static void riscv_virt_board_init(MachineState *machine) qdev_get_gpio_in(DEVICE(s->plic), VIRTIO_IRQ + i)); } + gpex_pcie_init(system_memory, + memmap[VIRT_PCIE_ECAM].base, + memmap[VIRT_PCIE_ECAM].size, + memmap[VIRT_PCIE_MMIO].base, + memmap[VIRT_PCIE_MMIO].size, + memmap[VIRT_PCIE_PIO].base, + DEVICE(s->plic), true); + serial_mm_init(system_memory, memmap[VIRT_UART0].base, 0, qdev_get_gpio_in(DEVICE(s->plic), UART0_IRQ), 399193, serial_hd(0), DEVICE_LITTLE_ENDIAN); diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h index 2b2e6dd..f12deae 100644 --- a/include/hw/riscv/virt.h +++ b/include/hw/riscv/virt.h @@ -38,13 +38,17 @@ enum { VIRT_PLIC, VIRT_UART0, VIRT_VIRTIO, - VIRT_DRAM + VIRT_DRAM, + VIRT_PCIE_MMIO, + VIRT_PCIE_PIO, + VIRT_PCIE_ECAM }; enum { UART0_IRQ = 10, VIRTIO_IRQ = 1, /* 1 to 8 */ VIRTIO_COUNT = 8, + PCIE_IRQ = 0x20, /* 32 to 35 */ VIRTIO_NDEV = 0x35 /* Arbitrary maximum number of interrupts */ }; @@ -62,6 +66,13 @@ enum { #define VIRT_PLIC_CONTEXT_BASE 0x200000 #define VIRT_PLIC_CONTEXT_STRIDE 0x1000 +#define FDT_PCI_ADDR_CELLS 3 +#define FDT_PCI_INT_CELLS 1 +#define FDT_PLIC_ADDR_CELLS 0 +#define FDT_PLIC_INT_CELLS 1 +#define FDT_INT_MAP_WIDTH (FDT_PCI_ADDR_CELLS + FDT_PCI_INT_CELLS + 1 + \ + FDT_PLIC_ADDR_CELLS + FDT_PLIC_INT_CELLS) + #if defined(TARGET_RISCV32) #define VIRT_CPU TYPE_RISCV_CPU_RV32GCSU_V1_10_0 #elif defined(TARGET_RISCV64) |