Re: [Qemu-devel] [PATCH 17/19] uninorth: create new uninorth device

[David Gibson <david@gibson.dropbear.id.au>]

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On Tue, Mar 06, 2018 at 08:31:01PM +0000, Mark Cave-Ayland wrote:
> Commit 4e46dcdbd3 "PPC: Newworld: Add uninorth token register" added a TODO
> which was to convert the uninorth registers hack to a proper device. Move
> these registers to a new uninorth device, removing the old hacks from
> mac_newworld.c.
> 
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> ---
>  hw/pci-host/trace-events       |  2 ++
>  hw/pci-host/uninorth.c         | 58 ++++++++++++++++++++++++++++++++++++++++++
>  hw/ppc/mac_newworld.c          | 41 +++++------------------------
>  hw/ppc/trace-events            |  4 ---
>  include/hw/pci-host/uninorth.h | 11 ++++++++
>  5 files changed, 77 insertions(+), 39 deletions(-)
> 
> diff --git a/hw/pci-host/trace-events b/hw/pci-host/trace-events
> index 341a87a702..dd7a398e96 100644
> --- a/hw/pci-host/trace-events
> +++ b/hw/pci-host/trace-events
> @@ -18,3 +18,5 @@ unin_set_irq(int irq_num, int level) "setting INT %d = %d"
>  unin_get_config_reg(uint32_t reg, uint32_t addr, uint32_t retval) "converted config space accessor 0x%"PRIx32 "/0x%"PRIx32 " -> 0x%"PRIx32
>  unin_data_write(uint64_t addr, unsigned len, uint64_t val) "write addr 0x%"PRIx64 " len %d val 0x%"PRIx64
>  unin_data_read(uint64_t addr, unsigned len, uint64_t val) "read addr 0x%"PRIx64 " len %d val 0x%"PRIx64
> +unin_write(uint64_t addr, uint64_t value) "addr=0x%" PRIx64 " val=0x%"PRIx64
> +unin_read(uint64_t addr, uint64_t value) "addr=0x%" PRIx64 " val=0x%"PRIx64
> diff --git a/hw/pci-host/uninorth.c b/hw/pci-host/uninorth.c
> index fada0ffd5f..dbfad01d9d 100644
> --- a/hw/pci-host/uninorth.c
> +++ b/hw/pci-host/uninorth.c
> @@ -519,6 +519,62 @@ static const TypeInfo pci_unin_internal_info = {
>      .class_init    = pci_unin_internal_class_init,
>  };
>  
> +/* UniN device */
> +static void unin_write(void *opaque, hwaddr addr, uint64_t value,
> +                       unsigned size)
> +{
> +    trace_unin_write(addr, value);
> +    if (addr == 0x0) {
> +        *(int *)opaque = value;
> +    }
> +}
> +
> +static uint64_t unin_read(void *opaque, hwaddr addr, unsigned size)
> +{
> +    uint32_t value;
> +
> +    value = 0;
> +    switch (addr) {
> +    case 0:
> +        value = *(int *)opaque;
> +    }
> +
> +    trace_unin_read(addr, value);
> +
> +    return value;
> +}
> +
> +static const MemoryRegionOps unin_ops = {
> +    .read = unin_read,
> +    .write = unin_write,
> +    .endianness = DEVICE_NATIVE_ENDIAN,

DEVICE_NATIVE_ENDIAN is almost always wrong.  I'm pretty sure it
should be DEVICE_BIG_ENDIAN.  I realize this is just a code motion,
but while you're making a proper device of it, you might as well fix
this to.

> +};
> +
> +static void unin_init(Object *obj)
> +{
> +    UNINState *s = UNI_NORTH(obj);
> +    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
> +
> +    memory_region_init_io(&s->mem, obj, &unin_ops, &s->token, "unin", 0x1000);
> +
> +    sysbus_init_mmio(sbd, &s->mem);
> +}
> +
> +static void unin_class_init(ObjectClass *klass, void *data)
> +{
> +    DeviceClass *dc = DEVICE_CLASS(klass);
> +
> +    set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
> +}
> +
> +static const TypeInfo unin_info = {
> +    .name          = TYPE_UNI_NORTH,
> +    .parent        = TYPE_SYS_BUS_DEVICE,
> +    .instance_size = sizeof(UNINState),
> +    .instance_init = unin_init,
> +    .class_init    = unin_class_init,
> +};
> +
>  static void unin_register_types(void)
>  {
>      type_register_static(&unin_main_pci_host_info);
> @@ -530,6 +586,8 @@ static void unin_register_types(void)
>      type_register_static(&pci_u3_agp_info);
>      type_register_static(&pci_unin_agp_info);
>      type_register_static(&pci_unin_internal_info);
> +
> +    type_register_static(&unin_info);
>  }
>  
>  type_init(unin_register_types)
> diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
> index ae0de4e36e..2fcb101982 100644
> --- a/hw/ppc/mac_newworld.c
> +++ b/hw/ppc/mac_newworld.c
> @@ -83,36 +83,6 @@
>  
>  #define NDRV_VGA_FILENAME "qemu_vga.ndrv"
>  
> -/* UniN device */
> -static void unin_write(void *opaque, hwaddr addr, uint64_t value,
> -                       unsigned size)
> -{
> -    trace_mac99_uninorth_write(addr, value);
> -    if (addr == 0x0) {
> -        *(int*)opaque = value;
> -    }
> -}
> -
> -static uint64_t unin_read(void *opaque, hwaddr addr, unsigned size)
> -{
> -    uint32_t value;
> -
> -    value = 0;
> -    switch (addr) {
> -    case 0:
> -        value = *(int*)opaque;
> -    }
> -
> -    trace_mac99_uninorth_read(addr, value);
> -
> -    return value;
> -}
> -
> -static const MemoryRegionOps unin_ops = {
> -    .read = unin_read,
> -    .write = unin_write,
> -    .endianness = DEVICE_NATIVE_ENDIAN,
> -};
>  
>  static void fw_cfg_boot_set(void *opaque, const char *boot_device,
>                              Error **errp)
> @@ -146,7 +116,6 @@ static void ppc_core99_init(MachineState *machine)
>      CPUPPCState *env = NULL;
>      char *filename;
>      qemu_irq *pic, **openpic_irqs;
> -    MemoryRegion *unin_memory = g_new(MemoryRegion, 1);
>      int linux_boot, i, j, k;
>      MemoryRegion *ram = g_new(MemoryRegion, 1), *bios = g_new(MemoryRegion, 1);
>      hwaddr kernel_base, initrd_base, cmdline_base = 0;
> @@ -165,7 +134,6 @@ static void ppc_core99_init(MachineState *machine)
>      int machine_arch;
>      SysBusDevice *s;
>      DeviceState *dev, *pic_dev;
> -    int *token = g_new(int, 1);
>      hwaddr nvram_addr = 0xFFF04000;
>      uint64_t tbfreq;
>  
> @@ -273,9 +241,12 @@ static void ppc_core99_init(MachineState *machine)
>          }
>      }
>  
> -    /* UniN init: XXX should be a real device */
> -    memory_region_init_io(unin_memory, NULL, &unin_ops, token, "unin", 0x1000);
> -    memory_region_add_subregion(get_system_memory(), 0xf8000000, unin_memory);
> +    /* UniN init */
> +    dev = qdev_create(NULL, TYPE_UNI_NORTH);
> +    qdev_init_nofail(dev);
> +    s = SYS_BUS_DEVICE(dev);
> +    memory_region_add_subregion(get_system_memory(), 0xf8000000,
> +                                sysbus_mmio_get_region(s, 0));
>  
>      openpic_irqs = g_malloc0(smp_cpus * sizeof(qemu_irq *));
>      openpic_irqs[0] =
> diff --git a/hw/ppc/trace-events b/hw/ppc/trace-events
> index 66ec7eda6e..dc5e65aee9 100644
> --- a/hw/ppc/trace-events
> +++ b/hw/ppc/trace-events
> @@ -92,10 +92,6 @@ rs6000mc_size_read(uint32_t addr, uint32_t val) "read addr=0x%x val=0x%x"
>  rs6000mc_size_write(uint32_t addr, uint32_t val) "write addr=0x%x val=0x%x"
>  rs6000mc_parity_read(uint32_t addr, uint32_t val) "read addr=0x%x val=0x%x"
>  
> -# hw/ppc/mac_newworld.c
> -mac99_uninorth_write(uint64_t addr, uint64_t value) "addr=0x%" PRIx64 " val=0x%"PRIx64
> -mac99_uninorth_read(uint64_t addr, uint64_t value) "addr=0x%" PRIx64 " val=0x%"PRIx64
> -
>  # hw/ppc/ppc4xx_pci.c
>  ppc4xx_pci_map_irq(int32_t devfn, int irq_num, int slot) "devfn 0x%x irq %d -> %d"
>  ppc4xx_pci_set_irq(int irq_num) "PCI irq %d"
> diff --git a/include/hw/pci-host/uninorth.h b/include/hw/pci-host/uninorth.h
> index d1424b165a..b0eb093e72 100644
> --- a/include/hw/pci-host/uninorth.h
> +++ b/include/hw/pci-host/uninorth.h
> @@ -51,4 +51,15 @@ typedef struct UNINHostState {
>      MemoryRegion pci_io;
>  } UNINHostState;
>  
> +typedef struct UNINState {
> +    SysBusDevice parent_obj;
> +
> +    MemoryRegion mem;
> +    int token[1];
> +} UNINState;
> +
> +#define TYPE_UNI_NORTH "uni-north"
> +#define UNI_NORTH(obj) \
> +    OBJECT_CHECK(UNINState, (obj), TYPE_UNI_NORTH)
> +
>  #endif /* UNINORTH_H */

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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