[U-Boot] [PATCH 2/2] x86: qemu: qfw: Implement acpi_get_rsdp_addr()

[Bin Meng]

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 at 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;
+}
 #endif
 
 /* Read configuration item using fw_cfg PIO interface */
-- 
2.7.4