Re: [Qemu-devel] [RFC 5/9] acpi: add PNP0C02 to PCI0 bus

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Feb 07, 2014 at 01:51:32PM +0100, Igor Mammedov wrote:
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> ---
>  hw/i386/acpi-build.c |   55 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 55 insertions(+), 0 deletions(-)
> 
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index 1dbe5ce..f0bedbd 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -492,6 +492,55 @@ static inline void acpi_add_table(GArray *table_offsets, GArray *table_data)
>      g_array_append_val(table_offsets, offset);
>  }
>  
> +static uint8_t Hex2Digit(char c)
> +{
> +    if (c >= 'A') {
> +        return c - 'A' + 10;
> +    }
> +    return c - '0';
> +}
> +
> +static uint32_t encodeEisaId(const char *str)
> +{
> +    uint32_t ret;
> +    g_assert(strlen(str) == 7);
> +    ret = (str[0] - 0x40) << 26 |
> +          (str[1] - 0x40) << 21 |
> +          (str[2] - 0x40) << 16 |
> +          Hex2Digit(str[3]) << 12 |
> +          Hex2Digit(str[4]) << 8 |
> +          Hex2Digit(str[5]) << 4 |
> +          Hex2Digit(str[6]);
> +    return bswap32(ret);
> +}
> +

Why the camel case here?
Seems uncalled for ...

> +#define ACPI_SCOPE(ctx, name, ...) {\
> +    GArray *name = build_alloc_array(); \
> +    build_append_nameseg(name, stringify(name)); \
> +    __VA_ARGS__; \
> +    build_package(name, ScopeOp, 0); \
> +    build_append_array(ctx, name); \
> +    build_free_array(name); \
> +}
> +
> +#define ACPI_NAME(ctx, name) { \
> +    build_append_byte(ctx, NameOp); \
> +    build_append_nameseg(ctx, name); \
> +}
> +
> +#define ACPI_EISAID(ctx, val) { \
> +    build_append_value(ctx, encodeEisaId(val), sizeof(uint32_t)); \
> +}
> +
> +#define ACPI_DEVICE(ctx, name, ...) {\
> +    GArray *name = build_alloc_array(); \
> +    build_append_nameseg(name, stringify(name)); \
> +    __VA_ARGS__; \
> +    build_extop_package(name, DeviceOp); \
> +    build_append_array(ctx, name); \
> +    build_free_array(name); \
> +}
> +
>  /* FACS */
>  static void
>  build_facs(GArray *table_data, GArray *linker, PcGuestInfo *guest_info)
> @@ -1032,6 +1081,12 @@ build_ssdt(GArray *table_data, GArray *linker,
>              build_pci_bus_state_cleanup(&hotplug_state);
>          }
>  
> +        ACPI_SCOPE(sb_scope, PCI0,
> +            ACPI_DEVICE(PCI0, MRES,
> +                ACPI_NAME(MRES, "_HID"); ACPI_EISAID(MRES, "PNP0C02");
> +            );
> +        );
> +

Wow you managed to make C look like ACPI,
including 4-character identifier limitation.
This needs some thought.

>          build_package(sb_scope, op, 3);
>          build_append_array(table_data, sb_scope);
>          build_free_array(sb_scope);
> -- 
> 1.7.1