hw/openrisc: Split re-usable boot time apis out to boot.c

These will be shared with the virt platform.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>

include/hw/openrisc/boot.h

@@ -0,0 +1,34 @@
+/*
+ * QEMU OpenRISC boot helpers.
+ *
+ * Copyright (c) 2022 Stafford Horne <shorne@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef OPENRISC_BOOT_H
+#define OPENRISC_BOOT_H
+
+#include "exec/cpu-defs.h"
+
+hwaddr openrisc_load_kernel(ram_addr_t ram_size,
+                            const char *kernel_filename,
+                            uint32_t *bootstrap_pc);
+
+hwaddr openrisc_load_initrd(void *fdt, const char *filename,
+                            hwaddr load_start, uint64_t mem_size);
+
+uint32_t openrisc_load_fdt(void *fdt, hwaddr load_start,
+                           uint64_t mem_size);
+
+#endif /* OPENRISC_BOOT_H */