On Tue, Jan 30, 2018 at 9:01 PM, Bin Meng <bmeng...@gmail.com> wrote:
> U-Boot on QEMU does not build ACPI table by ourself, instead it uses
> the prebuilt ACPI table via the qfw interface. This implements the
> qfw version of acpi_get_rsdp_addr() for setup_zimage().
>
> Signed-off-by: Bin Meng <bmeng...@gmail.com>
> ---
>
> drivers/misc/qfw.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/misc/qfw.c b/drivers/misc/qfw.c
> index a8af9e0..9a54803 100644
> --- a/drivers/misc/qfw.c
> +++ b/drivers/misc/qfw.c
> @@ -222,6 +222,14 @@ out:
> free(table_loader);
> return addr;
> }
> +
> +ulong acpi_get_rsdp_addr(void)
> +{
> + struct fw_file *file;
> +
> + file = qemu_fwcfg_find_file("etc/acpi/rsdp");
> + return file->addr;
qemu_fwcfg_find_file() can return NULL. Don't we need to check that ? Or
can we assume etc/acpi/rsdp is always present ?
Sorry for the late response.
Miao
> +}
> #endif
>
> /* Read configuration item using fw_cfg PIO interface */
> --
> 2.7.4
>
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