[v4,05/24] ppc/ppc405: Introduce a PPC405 SoC

It is an initial model to start QOMification of the PPC405 board.
QOM'ified devices will be reintroduced one by one. Start with the
memory regions, which name prefix is changed to "ppc405".

Also, initialize only one RAM bank. The second bank is a dummy one
(zero size) which is here to match the hard coded number of banks in
ppc405ep_init().

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/ppc/ppc405.h        | 16 ++++++++++++++++
 hw/ppc/ppc405_boards.c | 23 ++++++++++++-----------
 hw/ppc/ppc405_uc.c     | 40 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 68 insertions(+), 11 deletions(-)

On Tue, 9 Aug 2022, Cédric Le Goater wrote:
> It is an initial model to start QOMification of the PPC405 board.
> QOM'ified devices will be reintroduced one by one. Start with the
> memory regions, which name prefix is changed to "ppc405".
>
> Also, initialize only one RAM bank. The second bank is a dummy one
> (zero size) which is here to match the hard coded number of banks in
> ppc405ep_init().
>
> Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
> Signed-off-by: Cédric Le Goater <clg@kaod.org>

Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>

> ---
> hw/ppc/ppc405.h        | 16 ++++++++++++++++
> hw/ppc/ppc405_boards.c | 23 ++++++++++++-----------
> hw/ppc/ppc405_uc.c     | 40 ++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 68 insertions(+), 11 deletions(-)
>
> diff --git a/hw/ppc/ppc405.h b/hw/ppc/ppc405.h
> index 83f156f585c8..66dc21cdfed8 100644
> --- a/hw/ppc/ppc405.h
> +++ b/hw/ppc/ppc405.h
> @@ -25,6 +25,7 @@
> #ifndef PPC405_H
> #define PPC405_H
>
> +#include "qom/object.h"
> #include "hw/ppc/ppc4xx.h"
>
> #define PPC405EP_SDRAM_BASE 0x00000000
> @@ -62,6 +63,21 @@ struct ppc4xx_bd_info_t {
>     uint32_t bi_iic_fast[2];
> };
>
> +#define TYPE_PPC405_SOC "ppc405-soc"
> +OBJECT_DECLARE_SIMPLE_TYPE(Ppc405SoCState, PPC405_SOC);
> +
> +struct Ppc405SoCState {
> +    /* Private */
> +    DeviceState parent_obj;
> +
> +    /* Public */
> +    MemoryRegion ram_banks[2];
> +    hwaddr ram_bases[2], ram_sizes[2];
> +
> +    MemoryRegion *dram_mr;
> +    hwaddr ram_size;
> +};
> +
> /* PowerPC 405 core */
> ram_addr_t ppc405_set_bootinfo(CPUPPCState *env, ram_addr_t ram_size);
>
> diff --git a/hw/ppc/ppc405_boards.c b/hw/ppc/ppc405_boards.c
> index 381f39aa94cb..f029d6f415f6 100644
> --- a/hw/ppc/ppc405_boards.c
> +++ b/hw/ppc/ppc405_boards.c
> @@ -57,6 +57,8 @@ struct Ppc405MachineState {
>     /* Private */
>     MachineState parent_obj;
>     /* Public */
> +
> +    Ppc405SoCState soc;
> };
>
> /*****************************************************************************/
> @@ -232,11 +234,10 @@ static void boot_from_kernel(MachineState *machine, PowerPCCPU *cpu)
>
> static void ppc405_init(MachineState *machine)
> {
> +    Ppc405MachineState *ppc405 = PPC405_MACHINE(machine);
>     MachineClass *mc = MACHINE_GET_CLASS(machine);
>     const char *kernel_filename = machine->kernel_filename;
>     PowerPCCPU *cpu;
> -    MemoryRegion *ram_memories = g_new(MemoryRegion, 2);
> -    hwaddr ram_bases[2], ram_sizes[2];
>     MemoryRegion *sysmem = get_system_memory();
>     DeviceState *uicdev;
>
> @@ -247,16 +248,16 @@ static void ppc405_init(MachineState *machine)
>         exit(EXIT_FAILURE);
>     }
>
> -    /* XXX: fix this */
> -    memory_region_init_alias(&ram_memories[0], NULL, "ef405ep.ram.alias",
> -                             machine->ram, 0, machine->ram_size);
> -    ram_bases[0] = 0;
> -    ram_sizes[0] = machine->ram_size;
> -    memory_region_init(&ram_memories[1], NULL, "ef405ep.ram1", 0);
> -    ram_bases[1] = 0x00000000;
> -    ram_sizes[1] = 0x00000000;
> +    object_initialize_child(OBJECT(machine), "soc", &ppc405->soc,
> +                            TYPE_PPC405_SOC);
> +    object_property_set_uint(OBJECT(&ppc405->soc), "ram-size",
> +                             machine->ram_size, &error_fatal);
> +    object_property_set_link(OBJECT(&ppc405->soc), "dram",
> +                             OBJECT(machine->ram), &error_abort);
> +    qdev_realize(DEVICE(&ppc405->soc), NULL, &error_fatal);
>
> -    cpu = ppc405ep_init(sysmem, ram_memories, ram_bases, ram_sizes,
> +    cpu = ppc405ep_init(sysmem, ppc405->soc.ram_banks, ppc405->soc.ram_bases,
> +                        ppc405->soc.ram_sizes,
>                         33333333, &uicdev, kernel_filename == NULL ? 0 : 1);
>
>     /* allocate and load BIOS */
> diff --git a/hw/ppc/ppc405_uc.c b/hw/ppc/ppc405_uc.c
> index d6420c88d3a6..adadb3a0ae08 100644
> --- a/hw/ppc/ppc405_uc.c
> +++ b/hw/ppc/ppc405_uc.c
> @@ -30,6 +30,7 @@
> #include "hw/ppc/ppc.h"
> #include "hw/i2c/ppc4xx_i2c.h"
> #include "hw/irq.h"
> +#include "hw/qdev-properties.h"
> #include "ppc405.h"
> #include "hw/char/serial.h"
> #include "qemu/timer.h"
> @@ -1530,3 +1531,42 @@ PowerPCCPU *ppc405ep_init(MemoryRegion *address_space_mem,
>
>     return cpu;
> }
> +
> +static void ppc405_soc_realize(DeviceState *dev, Error **errp)
> +{
> +    Ppc405SoCState *s = PPC405_SOC(dev);
> +
> +    /* Initialize only one bank */
> +    s->ram_bases[0] = 0;
> +    s->ram_sizes[0] = s->ram_size;
> +    memory_region_init_alias(&s->ram_banks[0], OBJECT(s),
> +                             "ppc405.sdram0", s->dram_mr,
> +                             s->ram_bases[0], s->ram_sizes[0]);
> +}
> +
> +static Property ppc405_soc_properties[] = {
> +    DEFINE_PROP_LINK("dram", Ppc405SoCState, dram_mr, TYPE_MEMORY_REGION,
> +                     MemoryRegion *),
> +    DEFINE_PROP_UINT64("ram-size", Ppc405SoCState, ram_size, 0),
> +    DEFINE_PROP_END_OF_LIST(),
> +};
> +
> +static void ppc405_soc_class_init(ObjectClass *oc, void *data)
> +{
> +    DeviceClass *dc = DEVICE_CLASS(oc);
> +
> +    dc->realize = ppc405_soc_realize;
> +    dc->user_creatable = false;
> +    device_class_set_props(dc, ppc405_soc_properties);
> +}
> +
> +static const TypeInfo ppc405_types[] = {
> +    {
> +        .name           = TYPE_PPC405_SOC,
> +        .parent         = TYPE_DEVICE,
> +        .instance_size  = sizeof(Ppc405SoCState),
> +        .class_init     = ppc405_soc_class_init,
> +    }
> +};
> +
> +DEFINE_TYPES(ppc405_types)
>