1 files changed, 133 insertions, 0 deletions
diff --git a/sys/arch/loongson/stand/boot/rd.c b/sys/arch/loongson/stand/boot/rd.c
new file mode 100644
index 00000000000..5a00bfd4b76
--- /dev/null
+++ b/sys/arch/loongson/stand/boot/rd.c
@@ -0,0 +1,133 @@
+/*	$OpenBSD: rd.c,v 1.1 2010/02/17 21:25:49 miod Exp $	*/
+
+/*
+ * Copyright (c) 2010 Miodrag Vallat.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include "libsa.h"
+#include <machine/cpu.h>
+#include <machine/param.h>
+#include <sys/exec_elf.h>
+
+static	off_t rdoffs;
+
+/*
+ * INITRD I/O
+ */
+
+int
+rd_iostrategy(void *f, int rw, daddr_t dblk, size_t size, void *buf,
+    size_t *rsize)
+{
+	/* never invoked directly */
+	return ENXIO;
+}
+
+int
+rd_ioopen(struct open_file *f, ...)
+{
+	return 0;
+}
+
+int
+rd_ioclose(struct open_file *f)
+{
+	return 0;
+}
+
+int
+rd_isvalid()
+{
+	Elf64_Ehdr *elf64 = (Elf64_Ehdr *)INITRD_BASE;
+
+	if (memcmp(elf64->e_ident, ELFMAG, SELFMAG) != 0 ||
+	    elf64->e_ident[EI_CLASS] != ELFCLASS64 ||
+	    elf64->e_ident[EI_DATA] != ELFDATA2LSB ||
+	    elf64->e_type != ET_EXEC || elf64->e_machine != EM_MIPS)
+		return 0;
+
+	return 1;
+}
+
+/*
+ * INITRD filesystem
+ */
+int
+rdfs_open(char *path, struct open_file *f)
+{
+	if (f->f_dev->dv_open == rd_ioopen) {
+		rdoffs = 0;
+		return 0;
+	}
+
+	return EINVAL;
+}
+
+int
+rdfs_close(struct open_file *f)
+{
+	return 0;
+}
+
+int
+rdfs_read(struct open_file *f, void *buf, size_t size, size_t *resid)
+{
+	if (size != 0) {
+		bcopy((void *)(INITRD_BASE + rdoffs), buf, size);
+		rdoffs += size;
+	}
+	*resid = 0;
+
+	return 0;
+}
+
+int
+rdfs_write(struct open_file *f, void *buf, size_t size, size_t *resid)
+{
+	return EIO;
+}
+
+off_t
+rdfs_seek(struct open_file *f, off_t offset, int where)
+{
+	switch (where) {
+	case 0:	/* SEEK_SET */
+		rdoffs = offset;
+		break;
+	case 1: /* SEEK_CUR */
+		rdoffs += offset;
+		break;
+	default:
+		errno = EIO;
+		return -1;
+	}
+
+	return rdoffs;
+}
+
+int
+rdfs_stat(struct open_file *f, struct stat *sb)
+{
+	return EIO;
+}
+
+#ifndef NO_READDIR
+int
+rdfs_readdir(struct open_file *f, char *path)
+{
+	return EIO;
+}
+#endif