diff options
author | Stafford Horne <shorne@gmail.com> | 2022-06-12 21:22:53 +0900 |
---|---|---|
committer | Stafford Horne <shorne@gmail.com> | 2022-09-04 07:02:57 +0100 |
commit | 40fef82c4e7ea723b52eb3d2a0c4a46189f1ad44 (patch) | |
tree | d6f4281f4533b52ce991625541836e23cbb82e2a /hw/openrisc | |
parent | b5fcfe927b7a9cbbc0864e7fc4f34bc94631ee0e (diff) | |
download | qemu-40fef82c4e7ea723b52eb3d2a0c4a46189f1ad44.zip qemu-40fef82c4e7ea723b52eb3d2a0c4a46189f1ad44.tar.gz qemu-40fef82c4e7ea723b52eb3d2a0c4a46189f1ad44.tar.bz2 |
hw/openrisc: Add PCI bus support to virt
This is mostly borrowed from xtensa and riscv as examples. The
create_pcie_irq_map swizzle function is almost and exact copy
but here we use a single cell interrupt, possibly we can make
this generic.
Signed-off-by: Stafford Horne <shorne@gmail.com>
Diffstat (limited to 'hw/openrisc')
-rw-r--r-- | hw/openrisc/Kconfig | 3 | ||||
-rw-r--r-- | hw/openrisc/virt.c | 160 |
2 files changed, 157 insertions, 6 deletions
diff --git a/hw/openrisc/Kconfig b/hw/openrisc/Kconfig index 2021346..97af258 100644 --- a/hw/openrisc/Kconfig +++ b/hw/openrisc/Kconfig @@ -7,8 +7,11 @@ config OR1K_SIM config OR1K_VIRT bool + imply PCI_DEVICES imply VIRTIO_VGA imply TEST_DEVICES + select PCI + select PCI_EXPRESS_GENERIC_BRIDGE select GOLDFISH_RTC select SERIAL select SIFIVE_TEST diff --git a/hw/openrisc/virt.c b/hw/openrisc/virt.c index 54f2732..9a78234 100644 --- a/hw/openrisc/virt.c +++ b/hw/openrisc/virt.c @@ -17,6 +17,8 @@ #include "hw/core/split-irq.h" #include "hw/openrisc/boot.h" #include "hw/misc/sifive_test.h" +#include "hw/pci/pci.h" +#include "hw/pci-host/gpex.h" #include "hw/qdev-properties.h" #include "hw/rtc/goldfish_rtc.h" #include "hw/sysbus.h" @@ -47,6 +49,9 @@ typedef struct OR1KVirtState { enum { VIRT_DRAM, + VIRT_ECAM, + VIRT_MMIO, + VIRT_PIO, VIRT_TEST, VIRT_RTC, VIRT_VIRTIO, @@ -60,6 +65,7 @@ enum { VIRT_RTC_IRQ = 3, VIRT_VIRTIO_IRQ = 4, /* to 12 */ VIRTIO_COUNT = 8, + VIRT_PCI_IRQ_BASE = 13, /* to 17 */ }; static const struct MemmapEntry { @@ -72,6 +78,9 @@ static const struct MemmapEntry { [VIRT_RTC] = { 0x96005000, 0x1000 }, [VIRT_VIRTIO] = { 0x97000000, 0x1000 }, [VIRT_OMPIC] = { 0x98000000, VIRT_CPUS_MAX * 8 }, + [VIRT_ECAM] = { 0x9e000000, 0x1000000 }, + [VIRT_PIO] = { 0x9f000000, 0x1000000 }, + [VIRT_MMIO] = { 0xa0000000, 0x10000000 }, }; static struct openrisc_boot_info { @@ -115,12 +124,12 @@ static qemu_irq get_per_cpu_irq(OpenRISCCPU *cpus[], int num_cpus, int irq_pin) static void openrisc_create_fdt(OR1KVirtState *state, const struct MemmapEntry *memmap, int num_cpus, uint64_t mem_size, - const char *cmdline) + const char *cmdline, + int32_t *pic_phandle) { void *fdt; int cpu; char *nodename; - int pic_ph; fdt = state->fdt = create_device_tree(&state->fdt_size); if (!fdt) { @@ -163,14 +172,14 @@ static void openrisc_create_fdt(OR1KVirtState *state, nodename = (char *)"/pic"; qemu_fdt_add_subnode(fdt, nodename); - pic_ph = qemu_fdt_alloc_phandle(fdt); + *pic_phandle = qemu_fdt_alloc_phandle(fdt); qemu_fdt_setprop_string(fdt, nodename, "compatible", "opencores,or1k-pic-level"); qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", 1); qemu_fdt_setprop(fdt, nodename, "interrupt-controller", NULL, 0); - qemu_fdt_setprop_cell(fdt, nodename, "phandle", pic_ph); + qemu_fdt_setprop_cell(fdt, nodename, "phandle", *pic_phandle); - qemu_fdt_setprop_cell(fdt, "/", "interrupt-parent", pic_ph); + qemu_fdt_setprop_cell(fdt, "/", "interrupt-parent", *pic_phandle); qemu_fdt_add_subnode(fdt, "/chosen"); if (cmdline) { @@ -275,6 +284,7 @@ static void openrisc_virt_test_init(OR1KVirtState *state, hwaddr base, g_free(nodename); } + static void openrisc_virt_rtc_init(OR1KVirtState *state, hwaddr base, hwaddr size, int num_cpus, OpenRISCCPU *cpus[], int irq_pin) @@ -296,6 +306,134 @@ static void openrisc_virt_rtc_init(OR1KVirtState *state, hwaddr base, g_free(nodename); } + +static void create_pcie_irq_map(void *fdt, char *nodename, int irq_base, + uint32_t irqchip_phandle) +{ + int pin, dev; + uint32_t irq_map_stride = 0; + uint32_t full_irq_map[GPEX_NUM_IRQS * GPEX_NUM_IRQS * 6] = {}; + 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 << 3; + + for (pin = 0; pin < GPEX_NUM_IRQS; pin++) { + int irq_nr = irq_base + ((pin + PCI_SLOT(devfn)) % GPEX_NUM_IRQS); + int i = 0; + + /* Fill PCI address cells */ + irq_map[i++] = cpu_to_be32(devfn << 8); + irq_map[i++] = 0; + irq_map[i++] = 0; + + /* Fill PCI Interrupt cells */ + irq_map[i++] = cpu_to_be32(pin + 1); + + /* Fill interrupt controller phandle and cells */ + irq_map[i++] = cpu_to_be32(irqchip_phandle); + irq_map[i++] = cpu_to_be32(irq_nr); + + if (!irq_map_stride) { + irq_map_stride = i; + } + irq_map += irq_map_stride; + } + } + + qemu_fdt_setprop(fdt, nodename, "interrupt-map", full_irq_map, + GPEX_NUM_IRQS * GPEX_NUM_IRQS * + irq_map_stride * sizeof(uint32_t)); + + qemu_fdt_setprop_cells(fdt, nodename, "interrupt-map-mask", + 0x1800, 0, 0, 0x7); +} + +static void openrisc_virt_pcie_init(OR1KVirtState *state, + hwaddr ecam_base, hwaddr ecam_size, + hwaddr pio_base, hwaddr pio_size, + hwaddr mmio_base, hwaddr mmio_size, + int num_cpus, OpenRISCCPU *cpus[], + int irq_base, int32_t pic_phandle) +{ + void *fdt = state->fdt; + char *nodename; + MemoryRegion *alias; + MemoryRegion *reg; + DeviceState *dev; + qemu_irq pcie_irq; + int i; + + dev = qdev_new(TYPE_GPEX_HOST); + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); + + /* Map ECAM space. */ + alias = g_new0(MemoryRegion, 1); + reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0); + memory_region_init_alias(alias, OBJECT(dev), "pcie-ecam", + reg, 0, ecam_size); + memory_region_add_subregion(get_system_memory(), ecam_base, alias); + + /* + * Map the MMIO window into system address space so as to expose + * the section of PCI MMIO space which starts at the same base address + * (ie 1:1 mapping for that part of PCI MMIO space visible through + * the window). + */ + alias = g_new0(MemoryRegion, 1); + reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 1); + memory_region_init_alias(alias, OBJECT(dev), "pcie-mmio", + reg, mmio_base, mmio_size); + memory_region_add_subregion(get_system_memory(), mmio_base, alias); + + /* Map IO port space. */ + alias = g_new0(MemoryRegion, 1); + reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 2); + memory_region_init_alias(alias, OBJECT(dev), "pcie-pio", + reg, 0, pio_size); + memory_region_add_subregion(get_system_memory(), pio_base, alias); + + /* Connect IRQ lines. */ + for (i = 0; i < GPEX_NUM_IRQS; i++) { + pcie_irq = get_per_cpu_irq(cpus, num_cpus, irq_base + i); + + sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, pcie_irq); + gpex_set_irq_num(GPEX_HOST(dev), i, irq_base + i); + } + + nodename = g_strdup_printf("/soc/pci@%" HWADDR_PRIx, ecam_base); + qemu_fdt_add_subnode(fdt, nodename); + qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", 1); + qemu_fdt_setprop_cell(fdt, nodename, "#address-cells", 3); + qemu_fdt_setprop_cell(fdt, nodename, "#size-cells", 2); + 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, + ecam_size / PCIE_MMCFG_SIZE_MIN - 1); + qemu_fdt_setprop(fdt, nodename, "dma-coherent", NULL, 0); + qemu_fdt_setprop_cells(fdt, nodename, "reg", ecam_base, ecam_size); + /* pci-address(3) cpu-address(1) pci-size(2) */ + qemu_fdt_setprop_cells(fdt, nodename, "ranges", + FDT_PCI_RANGE_IOPORT, 0, 0, + pio_base, 0, pio_size, + FDT_PCI_RANGE_MMIO, 0, mmio_base, + mmio_base, 0, mmio_size); + + create_pcie_irq_map(fdt, nodename, irq_base, pic_phandle); + g_free(nodename); +} + static void openrisc_virt_virtio_init(OR1KVirtState *state, hwaddr base, hwaddr size, int num_cpus, OpenRISCCPU *cpus[], int irq_pin) @@ -333,6 +471,7 @@ static void openrisc_virt_init(MachineState *machine) hwaddr load_addr; int n; unsigned int smp_cpus = machine->smp.cpus; + int32_t pic_phandle; assert(smp_cpus >= 1 && smp_cpus <= VIRT_CPUS_MAX); for (n = 0; n < smp_cpus; n++) { @@ -352,7 +491,7 @@ static void openrisc_virt_init(MachineState *machine) memory_region_add_subregion(get_system_memory(), 0, ram); openrisc_create_fdt(state, virt_memmap, smp_cpus, machine->ram_size, - machine->kernel_cmdline); + machine->kernel_cmdline, &pic_phandle); if (smp_cpus > 1) { openrisc_virt_ompic_init(state, virt_memmap[VIRT_OMPIC].base, @@ -371,6 +510,15 @@ static void openrisc_virt_init(MachineState *machine) virt_memmap[VIRT_RTC].size, smp_cpus, cpus, VIRT_RTC_IRQ); + openrisc_virt_pcie_init(state, virt_memmap[VIRT_ECAM].base, + virt_memmap[VIRT_ECAM].size, + virt_memmap[VIRT_PIO].base, + virt_memmap[VIRT_PIO].size, + virt_memmap[VIRT_MMIO].base, + virt_memmap[VIRT_MMIO].size, + smp_cpus, cpus, + VIRT_PCI_IRQ_BASE, pic_phandle); + for (n = 0; n < VIRTIO_COUNT; n++) { openrisc_virt_virtio_init(state, virt_memmap[VIRT_VIRTIO].base + n * virt_memmap[VIRT_VIRTIO].size, |