[v6,06/22] hw/arm/virt-acpi-build: Generation of DSDT table for virt devices

From: Shannon Zhao <shannon.zhao@linaro.org>

DSDT consists of the usual common table header plus a definition
block in AML encoding which describes all devices in the platform.

After initializing DSDT with header information the namespace is
created which is followed by the device encodings. The devices are
described using the Resource Template for the 32-Bit Fixed Memory
Range and the Extended Interrupt Descriptors.

Signed-off-by: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
---
 hw/arm/virt-acpi-build.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)

Shannon Zhao <zhaoshenglong@huawei.com> writes:

> From: Shannon Zhao <shannon.zhao@linaro.org>
>
> DSDT consists of the usual common table header plus a definition
> block in AML encoding which describes all devices in the platform.
>
> After initializing DSDT with header information the namespace is
> created which is followed by the device encodings. The devices are
> described using the Resource Template for the 32-Bit Fixed Memory
> Range and the Extended Interrupt Descriptors.
>
> Signed-off-by: Shannon Zhao <zhaoshenglong@huawei.com>
> Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>


> ---
>  hw/arm/virt-acpi-build.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 128 insertions(+)
>
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index 960206d..1a00ad7 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -42,6 +42,130 @@
>  #include "hw/hw.h"
>  #include "hw/acpi/aml-build.h"
>  
> +static void acpi_dsdt_add_cpus(Aml *scope, int smp_cpus)
> +{
> +    uint16_t i;
> +
> +    for (i = 0; i < smp_cpus; i++) {
> +        Aml *dev = aml_device("C%03x", i);
> +        aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007")));
> +        aml_append(dev, aml_name_decl("_UID", aml_int(i)));
> +        Aml *crs = aml_resource_template();
> +        aml_append(dev, aml_name_decl("_CRS", crs));
> +        aml_append(scope, dev);
> +    }
> +}
> +
> +static void acpi_dsdt_add_uart(Aml *scope, const MemMap *uart_memmap,
> +                                           const int *uart_irq)
> +{
> +    Aml *dev = aml_device("COM0");
> +    aml_append(dev, aml_name_decl("_HID", aml_string("ARMH0011")));
> +    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
> +
> +    Aml *crs = aml_resource_template();
> +    aml_append(crs, aml_memory32_fixed(uart_memmap->addr,
> +                                       uart_memmap->size, aml_ReadWrite));
> +    aml_append(crs,
> +               aml_interrupt(aml_consumer, aml_level, aml_active_high,
> +               aml_exclusive, aml_not_wake_capable, *uart_irq + 32));
> +    aml_append(dev, aml_name_decl("_CRS", crs));
> +    aml_append(scope, dev);
> +}
> +
> +static void acpi_dsdt_add_rtc(Aml *scope, const MemMap *rtc_memmap,
> +                                          const int *rtc_irq)
> +{
> +    Aml *dev = aml_device("RTC0");
> +    aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0013")));
> +    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
> +
> +    Aml *crs = aml_resource_template();
> +    aml_append(crs, aml_memory32_fixed(rtc_memmap->addr,
> +                                       rtc_memmap->size, aml_ReadWrite));
> +    aml_append(crs,
> +               aml_interrupt(aml_consumer, aml_level, aml_active_high,
> +               aml_exclusive, aml_not_wake_capable, *rtc_irq + 32));
> +    aml_append(dev, aml_name_decl("_CRS", crs));
> +    aml_append(scope, dev);
> +}
> +
> +static void acpi_dsdt_add_flash(Aml *scope, const MemMap *flash_memmap)
> +{
> +    Aml *dev, *crs;
> +    hwaddr base = flash_memmap->addr;
> +    hwaddr size = flash_memmap->size;
> +
> +    dev = aml_device("FLS0");
> +    aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0015")));
> +    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
> +
> +    crs = aml_resource_template();
> +    aml_append(crs, aml_memory32_fixed(base, size, aml_ReadWrite));
> +    aml_append(dev, aml_name_decl("_CRS", crs));
> +    aml_append(scope, dev);
> +
> +    dev = aml_device("FLS1");
> +    aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0015")));
> +    aml_append(dev, aml_name_decl("_UID", aml_int(1)));
> +    crs = aml_resource_template();
> +    aml_append(crs, aml_memory32_fixed(base + size, size, aml_ReadWrite));
> +    aml_append(dev, aml_name_decl("_CRS", crs));
> +    aml_append(scope, dev);
> +}
> +
> +static void acpi_dsdt_add_virtio(Aml *scope, const MemMap *virtio_mmio_memmap,
> +                                             const int *mmio_irq, int num)
> +{
> +    hwaddr base = virtio_mmio_memmap->addr;
> +    hwaddr size = virtio_mmio_memmap->size;
> +    int irq = *mmio_irq + 32;
> +    int i;
> +
> +    for (i = 0; i < num; i++) {
> +        Aml *dev = aml_device("VR%02u", i);
> +        aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
> +        aml_append(dev, aml_name_decl("_UID", aml_int(i)));
> +
> +        Aml *crs = aml_resource_template();
> +        aml_append(crs, aml_memory32_fixed(base, size, aml_ReadWrite));
> +        aml_append(crs,
> +                   aml_interrupt(aml_consumer, aml_level, aml_active_high,
> +                   aml_exclusive, aml_not_wake_capable, irq + i));
> +        aml_append(dev, aml_name_decl("_CRS", crs));
> +        aml_append(scope, dev);
> +        base += size;
> +    }
> +}
> +
> +/* DSDT */
> +static void
> +build_dsdt(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
> +{
> +    Aml *scope, *dsdt;
> +    AcpiDsdtInfo *info = guest_info->dsdt_info;
> +
> +    dsdt = init_aml_allocator();
> +    /* Reserve space for header */
> +    acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader));
> +
> +    scope = aml_scope("\\_SB");
> +    acpi_dsdt_add_cpus(scope, guest_info->smp_cpus);
> +    acpi_dsdt_add_uart(scope, info->uart_memmap, info->uart_irq);
> +    acpi_dsdt_add_rtc(scope, info->rtc_memmap, info->rtc_irq);
> +    acpi_dsdt_add_flash(scope, info->flash_memmap);
> +    acpi_dsdt_add_virtio(scope, info->virtio_mmio_memmap,
> +             info->virtio_mmio_irq, info->virtio_mmio_num);
> +    aml_append(dsdt, scope);
> +
> +    /* copy AML table into ACPI tables blob and patch header there */
> +    g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
> +    build_header(linker, table_data,
> +        (void *)(table_data->data + table_data->len - dsdt->buf->len),
> +        "DSDT", dsdt->buf->len, 5);
> +    free_aml_allocator();
> +}
> +
>  typedef
>  struct AcpiBuildState {
>      /* Copy of table in RAM (for patching). */
> @@ -57,6 +181,7 @@ static
>  void virt_acpi_build(VirtGuestInfo *guest_info, AcpiBuildTables *tables)
>  {
>      GArray *table_offsets;
> +    GArray *tables_blob = tables->table_data;
>  
>      table_offsets = g_array_new(false, true /* clear */,
>                                          sizeof(uint32_t));
> @@ -74,6 +199,9 @@ void virt_acpi_build(VirtGuestInfo *guest_info, AcpiBuildTables *tables)
>       * DSDT
>       */
>  
> +    /* DSDT is pointed to by FADT */
> +    build_dsdt(tables_blob, tables->linker, guest_info);
> +
>      /* Cleanup memory that's no longer used. */
>      g_array_free(table_offsets, true);
>  }