Add RISC-V 64-bit support.

sys/stand/efiboot/bootriscv64/Makefile

@@ -0,0 +1,20 @@
+# $NetBSD: Makefile,v 1.1 2021/05/02 15:22:27 jmcneill Exp $
+
+PROG=		bootriscv64.efi
+OBJFMT=		binary
+NEWVERSWHAT=	"efiboot (riscv64)"
+GNUEFIARCH=	riscv64
+LIBGNUEFI_ARCH=	riscv64
+
+EXTRA_SOURCES=	efibootriscv64.c
+
+COPTS+=		-mcmodel=medany
+AFLAGS+=	-x assembler-with-cpp
+CFLAGS+=	-DEFIBOOT_ALIGN=0x200000
+CFLAGS+=	-DEFIBOOT_MODULE_MACHINE=\"riscv\"
+
+.include "${.CURDIR}/../Makefile.efiboot"
+
+release: check_RELEASEDIR
+	${HOST_INSTALL_FILE} -m ${BINMODE} ${PROG} \
+		${RELEASEDIR}/${RELEASEMACHINEDIR}/installation/misc

sys/stand/efiboot/bootriscv64/efibootriscv64.c

@@ -0,0 +1,78 @@
+/* $NetBSD: efibootriscv64.c,v 1.1 2021/05/02 15:22:27 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2021 Jared McNeill <jmcneill@invisible.ca>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "../efiboot.h"
+#include "../efifdt.h"
+
+#include <sys/bootblock.h>
+
+#include <loadfile.h>
+#include <libfdt.h>
+
+typedef void (*riscv_kernel_entry_t)(register_t, register_t);
+
+static uint32_t
+efi_fdt_get_boot_hartid(void)
+{
+	const int chosen = fdt_path_offset(efi_fdt_data(), "/chosen");
+	const uint32_t *data;
+
+	data = fdt_getprop(efi_fdt_data(), chosen, "boot-hartid", NULL);
+	if (data == NULL) {
+		return 0;	/* XXX */
+	}
+
+	return fdt32_to_cpu(*data);
+}
+
+void
+efi_boot_kernel(u_long marks[MARK_MAX])
+{
+	riscv_kernel_entry_t entry_fn;
+	register_t hart_id; /* a0 */
+	register_t fdt_start; /* a1 */
+
+	entry_fn = (riscv_kernel_entry_t)(uintptr_t)marks[MARK_ENTRY];
+
+	hart_id = efi_fdt_get_boot_hartid();
+	fdt_start = (register_t)efi_fdt_data();
+
+	asm volatile("fence rw,rw; fence.i" ::: "memory");
+
+	entry_fn(hart_id, fdt_start);
+}
+
+void
+efi_md_show(void)
+{
+}
+
+void
+efi_dcache_flush(u_long start, u_long size)
+{
+}