From c593d1cc2555c5fe6a6a558f4d2bdc3bfd6713de Mon Sep 17 00:00:00 2001 From: Bernhard Beschow Date: Tue, 18 Oct 2022 23:01:40 +0200 Subject: docs/system/ppc/ppce500: Use qemu-system-ppc64 across the board(s) The documentation suggests that there is a qemu-system-ppc32 binary while the 32 bit version is actually just named qemu-system-ppc. Settle on qemu-system-ppc64 which also works for 32 bit machines and causes less clutter in the documentation. Found-by: BALATON Zoltan Suggested-by: Bin Meng Reviewed-by: Daniel Henrique Barboza Signed-off-by: Bernhard Beschow Message-Id: <20221018210146.193159-2-shentey@gmail.com> Signed-off-by: Daniel Henrique Barboza --- docs/system/ppc/ppce500.rst | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'docs') diff --git a/docs/system/ppc/ppce500.rst b/docs/system/ppc/ppce500.rst index ba6bcb7314..7b5eb3c4ee 100644 --- a/docs/system/ppc/ppce500.rst +++ b/docs/system/ppc/ppce500.rst @@ -113,7 +113,7 @@ To boot the 32-bit Linux kernel: .. code-block:: bash - $ qemu-system-ppc{64|32} -M ppce500 -cpu e500mc -smp 4 -m 2G \ + $ qemu-system-ppc64 -M ppce500 -cpu e500mc -smp 4 -m 2G \ -display none -serial stdio \ -kernel vmlinux \ -initrd /path/to/rootfs.cpio \ @@ -154,10 +154,10 @@ interface at PCI address 0.1.0, but we can switch that to an e1000 NIC by: .. code-block:: bash - $ qemu-system-ppc -M ppce500 -smp 4 -m 2G \ - -display none -serial stdio \ - -bios u-boot \ - -nic tap,ifname=tap0,script=no,downscript=no,model=e1000 + $ qemu-system-ppc64 -M ppce500 -smp 4 -m 2G \ + -display none -serial stdio \ + -bios u-boot \ + -nic tap,ifname=tap0,script=no,downscript=no,model=e1000 The QEMU ``ppce500`` machine can also dynamically instantiate an eTSEC device if “-device eTSEC” is given to QEMU: -- cgit v1.2.3-55-g7522 From 63e4bf8e84721231ea447b0e4afcb0a4378763c2 Mon Sep 17 00:00:00 2001 From: Bernhard Beschow Date: Tue, 18 Oct 2022 23:01:44 +0200 Subject: hw/ppc/e500: Implement pflash handling Allows e500 boards to have their root file system reside on flash using only builtin devices located in the eLBC memory region. Note that the flash memory area is only created when a -pflash argument is given, and that the size is determined by the given file. The idea is to put users into control. Signed-off-by: Bernhard Beschow Reviewed-by: Daniel Henrique Barboza Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20221018210146.193159-6-shentey@gmail.com> [danielhb: use memory_region_size() in mmio_size] Signed-off-by: Daniel Henrique Barboza --- docs/system/ppc/ppce500.rst | 15 +++++++++ hw/ppc/Kconfig | 1 + hw/ppc/e500.c | 79 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 95 insertions(+) (limited to 'docs') diff --git a/docs/system/ppc/ppce500.rst b/docs/system/ppc/ppce500.rst index 7b5eb3c4ee..fa40e57d18 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 791fe78a50..769a1ead1c 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 3e950ea3ba..2fe496677c 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! * -- cgit v1.2.3-55-g7522