diff options
| -rw-r--r-- | docs/system/ppc/ppce500.rst | 15 | ||||
| -rw-r--r-- | hw/ppc/Kconfig | 1 | ||||
| -rw-r--r-- | hw/ppc/e500.c | 79 |
3 files changed, 95 insertions, 0 deletions
diff --git a/docs/system/ppc/ppce500.rst b/docs/system/ppc/ppce500.rst index 7b5eb3c..fa40e57 100644 --- a/docs/system/ppc/ppce500.rst +++ b/docs/system/ppc/ppce500.rst @@ -165,3 +165,18 @@ if “-device eTSEC” is given to QEMU: .. code-block:: bash -netdev tap,ifname=tap0,script=no,downscript=no,id=net0 -device eTSEC,netdev=net0 + +Root file system on flash drive +------------------------------- + +Rather than using a root file system on ram disk, it is possible to have it on +CFI flash. Given an ext2 image whose size must be a power of two, it can be used +as follows: + +.. code-block:: bash + + $ qemu-system-ppc64 -M ppce500 -cpu e500mc -smp 4 -m 2G \ + -display none -serial stdio \ + -kernel vmlinux \ + -drive if=pflash,file=/path/to/rootfs.ext2,format=raw \ + -append "rootwait root=/dev/mtdblock0" diff --git a/hw/ppc/Kconfig b/hw/ppc/Kconfig index 791fe78..769a1ea 100644 --- a/hw/ppc/Kconfig +++ b/hw/ppc/Kconfig @@ -126,6 +126,7 @@ config E500 select ETSEC select GPIO_MPC8XXX select OPENPIC + select PFLASH_CFI01 select PLATFORM_BUS select PPCE500_PCI select SERIAL diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c index 3e950ea..2fe4966 100644 --- a/hw/ppc/e500.c +++ b/hw/ppc/e500.c @@ -23,8 +23,10 @@ #include "e500-ccsr.h" #include "net/net.h" #include "qemu/config-file.h" +#include "hw/block/flash.h" #include "hw/char/serial.h" #include "hw/pci/pci.h" +#include "sysemu/block-backend-io.h" #include "sysemu/sysemu.h" #include "sysemu/kvm.h" #include "sysemu/reset.h" @@ -267,6 +269,31 @@ static void sysbus_device_create_devtree(SysBusDevice *sbdev, void *opaque) } } +static void create_devtree_flash(SysBusDevice *sbdev, + PlatformDevtreeData *data) +{ + g_autofree char *name = NULL; + uint64_t num_blocks = object_property_get_uint(OBJECT(sbdev), + "num-blocks", + &error_fatal); + uint64_t sector_length = object_property_get_uint(OBJECT(sbdev), + "sector-length", + &error_fatal); + uint64_t bank_width = object_property_get_uint(OBJECT(sbdev), + "width", + &error_fatal); + hwaddr flashbase = 0; + hwaddr flashsize = num_blocks * sector_length; + void *fdt = data->fdt; + + name = g_strdup_printf("%s/nor@%" PRIx64, data->node, flashbase); + qemu_fdt_add_subnode(fdt, name); + qemu_fdt_setprop_string(fdt, name, "compatible", "cfi-flash"); + qemu_fdt_setprop_sized_cells(fdt, name, "reg", + 1, flashbase, 1, flashsize); + qemu_fdt_setprop_cell(fdt, name, "bank-width", bank_width); +} + static void platform_bus_create_devtree(PPCE500MachineState *pms, void *fdt, const char *mpic) { @@ -276,6 +303,8 @@ static void platform_bus_create_devtree(PPCE500MachineState *pms, uint64_t addr = pmc->platform_bus_base; uint64_t size = pmc->platform_bus_size; int irq_start = pmc->platform_bus_first_irq; + SysBusDevice *sbdev; + bool ambiguous; /* Create a /platform node that we can put all devices into */ @@ -302,6 +331,13 @@ static void platform_bus_create_devtree(PPCE500MachineState *pms, /* Loop through all dynamic sysbus devices and create nodes for them */ foreach_dynamic_sysbus_device(sysbus_device_create_devtree, &data); + sbdev = SYS_BUS_DEVICE(object_resolve_path_type("", TYPE_PFLASH_CFI01, + &ambiguous)); + if (sbdev) { + assert(!ambiguous); + create_devtree_flash(sbdev, &data); + } + g_free(node); } @@ -856,6 +892,7 @@ void ppce500_init(MachineState *machine) unsigned int pci_irq_nrs[PCI_NUM_PINS] = {1, 2, 3, 4}; IrqLines *irqs; DeviceState *dev, *mpicdev; + DriveInfo *dinfo; CPUPPCState *firstenv = NULL; MemoryRegion *ccsr_addr_space; SysBusDevice *s; @@ -1024,6 +1061,48 @@ void ppce500_init(MachineState *machine) pmc->platform_bus_base, &pms->pbus_dev->mmio); + dinfo = drive_get(IF_PFLASH, 0, 0); + if (dinfo) { + BlockBackend *blk = blk_by_legacy_dinfo(dinfo); + BlockDriverState *bs = blk_bs(blk); + uint64_t mmio_size = memory_region_size(&pms->pbus_dev->mmio); + uint64_t size = bdrv_getlength(bs); + uint32_t sector_len = 64 * KiB; + + if (!is_power_of_2(size)) { + error_report("Size of pflash file must be a power of two."); + exit(1); + } + + if (size > mmio_size) { + error_report("Size of pflash file must not be bigger than %" PRIu64 + " bytes.", mmio_size); + exit(1); + } + + if (!QEMU_IS_ALIGNED(size, sector_len)) { + error_report("Size of pflash file must be a multiple of %" PRIu32 + ".", sector_len); + exit(1); + } + + dev = qdev_new(TYPE_PFLASH_CFI01); + qdev_prop_set_drive(dev, "drive", blk); + qdev_prop_set_uint32(dev, "num-blocks", size / sector_len); + qdev_prop_set_uint64(dev, "sector-length", sector_len); + qdev_prop_set_uint8(dev, "width", 2); + qdev_prop_set_bit(dev, "big-endian", true); + qdev_prop_set_uint16(dev, "id0", 0x89); + qdev_prop_set_uint16(dev, "id1", 0x18); + qdev_prop_set_uint16(dev, "id2", 0x0000); + qdev_prop_set_uint16(dev, "id3", 0x0); + qdev_prop_set_string(dev, "name", "e500.flash"); + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); + + memory_region_add_subregion(&pms->pbus_dev->mmio, 0, + pflash_cfi01_get_memory(PFLASH_CFI01(dev))); + } + /* * Smart firmware defaults ahead! * |