emulation/qemu-i440fx,q35: Split chromeos.c

This drops VBOOT_NO_BOARD_SUPPORT.

There is little impact of always having recovery_mode_switch()
implemented in bootmode.c. A weak write_protect_state() is not
necessary as there is no BOOT_DEVICE_SPI_FLASH with the emulation.
Call to fill_lb_gpios() is already guarded with CONFIG(CHROMEOS)
so the weak implementation would not be referenced.

Change-Id: I3c00b30c5233ae3556b7622f97c3166668c8ab12
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58946
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/mainboard/emulation/qemu-i440fx/bootmode.c b/src/mainboard/emulation/qemu-i440fx/bootmode.c
new file mode 100644
index 000000000000..12990b2552ac
--- /dev/null
+++ b/src/mainboard/emulation/qemu-i440fx/bootmode.c
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <bootmode.h>
+#include <console/console.h>
+#include "fw_cfg.h"
+
+/*
+ * Enable recovery mode with fw_cfg option to qemu:
+ *   -fw_cfg name=opt/cros/recovery,string=1
+ */
+int get_recovery_mode_switch(void)
+{
+	FWCfgFile f;
+
+	if (!fw_cfg_check_file(&f, "opt/cros/recovery")) {
+		uint8_t rec_mode;
+		if (f.size != 1) {
+			printk(BIOS_ERR, "opt/cros/recovery invalid size %d\n", f.size);
+			return 0;
+		}
+		fw_cfg_get(f.select, &rec_mode, f.size);
+		if (rec_mode == '1') {
+			printk(BIOS_INFO, "Recovery is enabled.\n");
+			return 1;
+		}
+	}
+
+	return 0;
+}