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x86: qemu: qfw: Implement acpi_get_rsdp_addr()

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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.cn@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Bin Meng 2018-01-30 05:01:17 -08:00
parent 45410da714
commit 2d1c661915
1 changed files with 8 additions and 0 deletions
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8
drivers/misc/qfw.c
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@ -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;
}
#endif
/* Read configuration item using fw_cfg PIO interface */