[v9,2/3] hw/ppc: Add emulation of AmigaOne XE board

The AmigaOne is a rebranded MAI Teron board that uses U-Boot firmware
with patches to support AmigaOS and is very similar to pegasos2 so can
be easily emulated sharing most code with pegasos2. The reason to
emulate it is that AmigaOS comes in different versions for AmigaOne
and PegasosII which only have drivers for one machine and firmware so
these only run on the specific machine. Adding this board allows
another AmigaOS version to be used reusing already existing peagasos2
emulation. (The AmigaOne was the first of these boards so likely most
widespread which then inspired Pegasos that was later replaced with
PegasosII due to problems with Articia S, so these have a lot of
similarity. Pegasos mainly ran MorphOS while the PegasosII version of
AmigaOS was added later and therefore less common than the AmigaOne
version.)

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Tested-by: Rene Engel <ReneEngel80@emailn.de>
---
v9: Skip error about missing -bios when using qtest

 MAINTAINERS                             |   8 ++
 configs/devices/ppc-softmmu/default.mak |   1 +
 hw/ppc/Kconfig                          |   7 +
 hw/ppc/amigaone.c                       | 166 ++++++++++++++++++++++++
 hw/ppc/meson.build                      |   2 +
 5 files changed, 184 insertions(+)
 create mode 100644 hw/ppc/amigaone.c

On 11/7/23 15:40, BALATON Zoltan wrote:
> The AmigaOne is a rebranded MAI Teron board that uses U-Boot firmware
> with patches to support AmigaOS and is very similar to pegasos2 so can
> be easily emulated sharing most code with pegasos2. The reason to
> emulate it is that AmigaOS comes in different versions for AmigaOne
> and PegasosII which only have drivers for one machine and firmware so
> these only run on the specific machine. Adding this board allows
> another AmigaOS version to be used reusing already existing peagasos2
> emulation. (The AmigaOne was the first of these boards so likely most
> widespread which then inspired Pegasos that was later replaced with
> PegasosII due to problems with Articia S, so these have a lot of
> similarity. Pegasos mainly ran MorphOS while the PegasosII version of
> AmigaOS was added later and therefore less common than the AmigaOne
> version.)
> 
> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> Tested-by: Rene Engel <ReneEngel80@emailn.de>

Acked-by: Daniel Henrique Barboza <danielhb413@gmail.com>

This is passing qtest-hmp and it's not adding a new firmware in pc-bios, so
let's go with it.


Thanks,

Daniel

> ---
> v9: Skip error about missing -bios when using qtest
> 
>   MAINTAINERS                             |   8 ++
>   configs/devices/ppc-softmmu/default.mak |   1 +
>   hw/ppc/Kconfig                          |   7 +
>   hw/ppc/amigaone.c                       | 166 ++++++++++++++++++++++++
>   hw/ppc/meson.build                      |   2 +
>   5 files changed, 184 insertions(+)
>   create mode 100644 hw/ppc/amigaone.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index b86ea7f75a..3d0aec7ffa 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1536,6 +1536,14 @@ F: hw/pci-host/mv64361.c
>   F: hw/pci-host/mv643xx.h
>   F: include/hw/pci-host/mv64361.h
>   
> +amigaone
> +M: BALATON Zoltan <balaton@eik.bme.hu>
> +L: qemu-ppc@nongnu.org
> +S: Maintained
> +F: hw/ppc/amigaone.c
> +F: hw/pci-host/articia.c
> +F: include/hw/pci-host/articia.h
> +
>   Virtual Open Firmware (VOF)
>   M: Alexey Kardashevskiy <aik@ozlabs.ru>
>   R: David Gibson <david@gibson.dropbear.id.au>
> diff --git a/configs/devices/ppc-softmmu/default.mak b/configs/devices/ppc-softmmu/default.mak
> index a887f5438b..b85fd2bcd7 100644
> --- a/configs/devices/ppc-softmmu/default.mak
> +++ b/configs/devices/ppc-softmmu/default.mak
> @@ -14,6 +14,7 @@ CONFIG_SAM460EX=y
>   CONFIG_MAC_OLDWORLD=y
>   CONFIG_MAC_NEWWORLD=y
>   
> +CONFIG_AMIGAONE=y
>   CONFIG_PEGASOS2=y
>   
>   # For PReP
> diff --git a/hw/ppc/Kconfig b/hw/ppc/Kconfig
> index 5dfbf47ef5..56f0475a8e 100644
> --- a/hw/ppc/Kconfig
> +++ b/hw/ppc/Kconfig
> @@ -69,6 +69,13 @@ config SAM460EX
>       select USB_OHCI
>       select FDT_PPC
>   
> +config AMIGAONE
> +    bool
> +    imply ATI_VGA
> +    select ARTICIA
> +    select VT82C686
> +    select SMBUS_EEPROM
> +
>   config PEGASOS2
>       bool
>       imply ATI_VGA
> diff --git a/hw/ppc/amigaone.c b/hw/ppc/amigaone.c
> new file mode 100644
> index 0000000000..992a55e632
> --- /dev/null
> +++ b/hw/ppc/amigaone.c
> @@ -0,0 +1,166 @@
> +/*
> + * QEMU Eyetech AmigaOne/Mai Logic Teron emulation
> + *
> + * Copyright (c) 2023 BALATON Zoltan
> + *
> + * This work is licensed under the GNU GPL license version 2 or later.
> + *
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qemu/units.h"
> +#include "qemu/datadir.h"
> +#include "qemu/log.h"
> +#include "qemu/error-report.h"
> +#include "qapi/error.h"
> +#include "hw/ppc/ppc.h"
> +#include "hw/boards.h"
> +#include "hw/loader.h"
> +#include "hw/pci-host/articia.h"
> +#include "hw/isa/vt82c686.h"
> +#include "hw/ide/pci.h"
> +#include "hw/i2c/smbus_eeprom.h"
> +#include "hw/ppc/ppc.h"
> +#include "sysemu/qtest.h"
> +#include "sysemu/reset.h"
> +#include "kvm_ppc.h"
> +
> +#define BUS_FREQ_HZ 100000000
> +
> +/*
> + * Firmware binary available at
> + * https://www.hyperion-entertainment.com/index.php/downloads?view=files&parent=28
> + * then "tail -c 524288 updater.image >u-boot-amigaone.bin"
> + *
> + * BIOS emulator in firmware cannot run QEMU vgabios and hangs on it, use
> + * -device VGA,romfile=VGABIOS-lgpl-latest.bin
> + * from http://www.nongnu.org/vgabios/ instead.
> + */
> +#define PROM_FILENAME "u-boot-amigaone.bin"
> +#define PROM_ADDR 0xfff00000
> +#define PROM_SIZE (512 * KiB)
> +
> +static void amigaone_cpu_reset(void *opaque)
> +{
> +    PowerPCCPU *cpu = opaque;
> +
> +    cpu_reset(CPU(cpu));
> +    cpu_ppc_tb_reset(&cpu->env);
> +}
> +
> +static void fix_spd_data(uint8_t *spd)
> +{
> +    uint32_t bank_size = 4 * MiB * spd[31];
> +    uint32_t rows = bank_size / spd[13] / spd[17];
> +    spd[3] = ctz32(rows) - spd[4];
> +}
> +
> +static void amigaone_init(MachineState *machine)
> +{
> +    PowerPCCPU *cpu;
> +    CPUPPCState *env;
> +    MemoryRegion *rom, *pci_mem, *mr;
> +    const char *fwname = machine->firmware ?: PROM_FILENAME;
> +    char *filename;
> +    ssize_t sz;
> +    PCIBus *pci_bus;
> +    Object *via;
> +    DeviceState *dev;
> +    I2CBus *i2c_bus;
> +    uint8_t *spd_data;
> +    int i;
> +
> +    /* init CPU */
> +    cpu = POWERPC_CPU(cpu_create(machine->cpu_type));
> +    env = &cpu->env;
> +    if (PPC_INPUT(env) != PPC_FLAGS_INPUT_6xx) {
> +        error_report("Incompatible CPU, only 6xx bus supported");
> +        exit(1);
> +    }
> +    cpu_ppc_tb_init(env, BUS_FREQ_HZ / 4);
> +    qemu_register_reset(amigaone_cpu_reset, cpu);
> +
> +    /* RAM */
> +    if (machine->ram_size > 2 * GiB) {
> +        error_report("RAM size more than 2 GiB is not supported");
> +        exit(1);
> +    }
> +    memory_region_add_subregion(get_system_memory(), 0, machine->ram);
> +    if (machine->ram_size < 1 * GiB + 32 * KiB) {
> +        /* Firmware uses this area for startup */
> +        mr = g_new(MemoryRegion, 1);
> +        memory_region_init_ram(mr, NULL, "init-cache", 32 * KiB, &error_fatal);
> +        memory_region_add_subregion(get_system_memory(), 0x40000000, mr);
> +    }
> +
> +    /* allocate and load firmware */
> +    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, fwname);
> +    if (filename) {
> +        rom = g_new(MemoryRegion, 1);
> +        memory_region_init_rom(rom, NULL, "rom", PROM_SIZE, &error_fatal);
> +        memory_region_add_subregion(get_system_memory(), PROM_ADDR, rom);
> +        sz = load_image_targphys(filename, PROM_ADDR, PROM_SIZE);
> +        if (sz <= 0 || sz > PROM_SIZE) {
> +            error_report("Could not load firmware '%s'", filename);
> +            exit(1);
> +        }
> +        g_free(filename);
> +    } else if (!qtest_enabled()) {
> +        error_report("Could not find firmware '%s'", fwname);
> +        exit(1);
> +    }
> +
> +    /* Articia S */
> +    dev = sysbus_create_simple(TYPE_ARTICIA, 0xfe000000, NULL);
> +
> +    i2c_bus = I2C_BUS(qdev_get_child_bus(dev, "smbus"));
> +    if (machine->ram_size > 512 * MiB) {
> +        spd_data = spd_data_generate(SDR, machine->ram_size / 2);
> +    } else {
> +        spd_data = spd_data_generate(SDR, machine->ram_size);
> +    }
> +    fix_spd_data(spd_data);
> +    smbus_eeprom_init_one(i2c_bus, 0x51, spd_data);
> +    if (machine->ram_size > 512 * MiB) {
> +        smbus_eeprom_init_one(i2c_bus, 0x52, spd_data);
> +    }
> +
> +    pci_mem = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 1);
> +    mr = g_new(MemoryRegion, 1);
> +    memory_region_init_alias(mr, OBJECT(dev), "pci-mem-low", pci_mem,
> +                             0, 0x1000000);
> +    memory_region_add_subregion(get_system_memory(), 0xfd000000, mr);
> +    mr = g_new(MemoryRegion, 1);
> +    memory_region_init_alias(mr, OBJECT(dev), "pci-mem-high", pci_mem,
> +                             0x80000000, 0x7d000000);
> +    memory_region_add_subregion(get_system_memory(), 0x80000000, mr);
> +    pci_bus = PCI_BUS(qdev_get_child_bus(dev, "pci.0"));
> +
> +    /* VIA VT82c686B South Bridge (multifunction PCI device) */
> +    via = OBJECT(pci_create_simple_multifunction(pci_bus, PCI_DEVFN(7, 0),
> +                                                 TYPE_VT82C686B_ISA));
> +    object_property_add_alias(OBJECT(machine), "rtc-time",
> +                              object_resolve_path_component(via, "rtc"),
> +                              "date");
> +    qdev_connect_gpio_out(DEVICE(via), 0,
> +                          qdev_get_gpio_in(DEVICE(cpu), PPC6xx_INPUT_INT));
> +    for (i = 0; i < PCI_NUM_PINS; i++) {
> +        qdev_connect_gpio_out(dev, i, qdev_get_gpio_in_named(DEVICE(via),
> +                                                             "pirq", i));
> +    }
> +    pci_ide_create_devs(PCI_DEVICE(object_resolve_path_component(via, "ide")));
> +    pci_vga_init(pci_bus);
> +}
> +
> +static void amigaone_machine_init(MachineClass *mc)
> +{
> +    mc->desc = "Eyetech AmigaOne/Mai Logic Teron";
> +    mc->init = amigaone_init;
> +    mc->block_default_type = IF_IDE;
> +    mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("7457_v1.2");
> +    mc->default_display = "std";
> +    mc->default_ram_id = "ram";
> +    mc->default_ram_size = 512 * MiB;
> +}
> +
> +DEFINE_MACHINE("amigaone", amigaone_machine_init)
> diff --git a/hw/ppc/meson.build b/hw/ppc/meson.build
> index 7c2c52434a..7338f9432a 100644
> --- a/hw/ppc/meson.build
> +++ b/hw/ppc/meson.build
> @@ -81,6 +81,8 @@ ppc_ss.add(when: 'CONFIG_E500', if_true: files(
>   ))
>   # PowerPC 440 Xilinx ML507 reference board.
>   ppc_ss.add(when: 'CONFIG_VIRTEX', if_true: files('virtex_ml507.c'))
> +# AmigaOne
> +ppc_ss.add(when: 'CONFIG_AMIGAONE', if_true: files('amigaone.c'))
>   # Pegasos2
>   ppc_ss.add(when: 'CONFIG_PEGASOS2', if_true: files('pegasos2.c'))
>