Re: [Qemu-devel] [PATCH v4 5/6] m68k: Add serial controller to the NeXTcube machine

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 7/9/19 9:32 AM, Thomas Huth wrote:
> The NeXTcube uses a normal 8530 serial controller, so we can simply use
> our normal "escc" device here.
> While we're at it, also add a boot-serial-test for the next-cube machine,
> now that the serial output works.
> 
> Signed-off-by: Thomas Huth <huth@tuxfamily.org>

Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> ---
>  hw/m68k/Kconfig          |  1 +
>  hw/m68k/next-cube.c      | 37 ++++++++++++++++++++++++++++++++++++-
>  tests/boot-serial-test.c | 12 ++++++++++++
>  3 files changed, 49 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/m68k/Kconfig b/hw/m68k/Kconfig
> index ec58a2eb06..a74fac5abd 100644
> --- a/hw/m68k/Kconfig
> +++ b/hw/m68k/Kconfig
> @@ -11,3 +11,4 @@ config MCF5208
>  config NEXTCUBE
>      bool
>      select FRAMEBUFFER
> +    select ESCC
> diff --git a/hw/m68k/next-cube.c b/hw/m68k/next-cube.c
> index 0737605417..b7f1e9106b 100644
> --- a/hw/m68k/next-cube.c
> +++ b/hw/m68k/next-cube.c
> @@ -846,6 +846,39 @@ void next_irq(void *opaque, int number, int level)
>      }
>  }
>  
> +static void next_serial_irq(void *opaque, int n, int level)
> +{
> +    /* DPRINTF("SCC IRQ NUM %i\n",n); */
> +    if (n) {
> +        next_irq(opaque, NEXT_SCC_DMA_I, level);
> +    } else {
> +        next_irq(opaque, NEXT_SCC_I, level);
> +    }
> +}
> +
> +static void next_escc_init(M68kCPU *cpu)
> +{
> +    qemu_irq *ser_irq = qemu_allocate_irqs(next_serial_irq, cpu, 2);
> +    DeviceState *dev;
> +    SysBusDevice *s;
> +
> +    dev = qdev_create(NULL, TYPE_ESCC);
> +    qdev_prop_set_uint32(dev, "disabled", 0);
> +    qdev_prop_set_uint32(dev, "frequency", 9600 * 384);
> +    qdev_prop_set_uint32(dev, "it_shift", 0);
> +    qdev_prop_set_bit(dev, "bit_swap", true);
> +    qdev_prop_set_chr(dev, "chrB", serial_hd(1));
> +    qdev_prop_set_chr(dev, "chrA", serial_hd(0));
> +    qdev_prop_set_uint32(dev, "chnBtype", escc_serial);
> +    qdev_prop_set_uint32(dev, "chnAtype", escc_serial);
> +    qdev_init_nofail(dev);
> +
> +    s = SYS_BUS_DEVICE(dev);
> +    sysbus_connect_irq(s, 0, ser_irq[0]);
> +    sysbus_connect_irq(s, 1,  ser_irq[1]);
> +    sysbus_mmio_map(s, 0, 0x2118000);
> +}
> +
>  static void next_cube_init(MachineState *machine)
>  {
>      M68kCPU *cpu;
> @@ -937,8 +970,10 @@ static void next_cube_init(MachineState *machine)
>          }
>      }
>  
> -    /* TODO: */
>      /* Serial */
> +    next_escc_init(cpu);
> +
> +    /* TODO: */
>      /* Network */
>      /* SCSI */
>  
> diff --git a/tests/boot-serial-test.c b/tests/boot-serial-test.c
> index 24852d4c7d..c8ded1195e 100644
> --- a/tests/boot-serial-test.c
> +++ b/tests/boot-serial-test.c
> @@ -24,6 +24,17 @@ static const uint8_t kernel_mcf5208[] = {
>      0x60, 0xfa                              /* bra.s  loop */
>  };
>  
> +static const uint8_t bios_nextcube[] = {
> +    0x06, 0x00, 0x00, 0x00,                 /* Initial SP */
> +    0x01, 0x00, 0x00, 0x08,                 /* Initial PC */
> +    0x41, 0xf9, 0x02, 0x11, 0x80, 0x00,     /* lea 0x02118000,%a0 */
> +    0x10, 0x3c, 0x00, 0x54,                 /* move.b #'T',%d0 */
> +    0x11, 0x7c, 0x00, 0x05, 0x00, 0x01,     /* move.b #5,1(%a0)    Sel TXCTRL */
> +    0x11, 0x7c, 0x00, 0x68, 0x00, 0x01,     /* move.b #0x68,1(%a0) Enable TX */
> +    0x11, 0x40, 0x00, 0x03,                 /* move.b %d0,3(%a0)   Print 'T' */
> +    0x60, 0xfa                              /* bra.s  loop */
> +};
> +
>  static const uint8_t kernel_pls3adsp1800[] = {
>      0xb0, 0x00, 0x84, 0x00,                 /* imm   0x8400 */
>      0x30, 0x60, 0x00, 0x04,                 /* addik r3,r0,4 */
> @@ -116,6 +127,7 @@ static testdef_t tests[] = {
>      { "sparc64", "sun4u", "", "UltraSPARC" },
>      { "s390x", "s390-ccw-virtio", "", "device" },
>      { "m68k", "mcf5208evb", "", "TT", sizeof(kernel_mcf5208), kernel_mcf5208 },
> +    { "m68k", "next-cube", "", "TT", sizeof(bios_nextcube), 0, bios_nextcube },
>      { "microblaze", "petalogix-s3adsp1800", "", "TT",
>        sizeof(kernel_pls3adsp1800), kernel_pls3adsp1800 },
>      { "microblazeel", "petalogix-ml605", "", "TT",
>