Add build system scaffolding and libc headers

1 files changed, 60 insertions, 0 deletions

diff --git a/include/arch/x86_64/linux/romfs_fs.h b/include/arch/x86_64/linux/romfs_fs.h
new file mode 100644
index 00000000..7d9aeb24
--- /dev/null
+++ b/include/arch/x86_64/linux/romfs_fs.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __LINUX_ROMFS_FS_H
+#define __LINUX_ROMFS_FS_H
+
+#include <linux/types.h>
+#include <linux/fs.h>
+
+/* The basic structures of the romfs filesystem */
+
+#define ROMBSIZE    BLOCK_SIZE
+#define ROMBSBITS   BLOCK_SIZE_BITS
+#define ROMBMASK    (ROMBSIZE - 1)
+#define ROMFS_MAGIC 0x7275
+
+#define ROMFS_MAXFN 128
+
+#define __mkw(h, l)	  (((h) & 0x00ff) << 8 | ((l) & 0x00ff))
+#define __mkl(h, l)	  (((h) & 0xffff) << 16 | ((l) & 0xffff))
+#define __mk4(a, b, c, d) cpu_to_be32(__mkl(__mkw(a, b), __mkw(c, d)))
+#define ROMSB_WORD0	  __mk4('-', 'r', 'o', 'm')
+#define ROMSB_WORD1	  __mk4('1', 'f', 's', '-')
+
+/* On-disk "super block" */
+
+struct romfs_super_block {
+	__be32 word0;
+	__be32 word1;
+	__be32 size;
+	__be32 checksum;
+	char name[]; /* volume name */
+};
+
+/* On disk inode */
+
+struct romfs_inode {
+	__be32 next; /* low 4 bits see ROMFH_ */
+	__be32 spec;
+	__be32 size;
+	__be32 checksum;
+	char name[];
+};
+
+#define ROMFH_TYPE 7
+#define ROMFH_HRD  0
+#define ROMFH_DIR  1
+#define ROMFH_REG  2
+#define ROMFH_SYM  3
+#define ROMFH_BLK  4
+#define ROMFH_CHR  5
+#define ROMFH_SCK  6
+#define ROMFH_FIF  7
+#define ROMFH_EXEC 8
+
+/* Alignment */
+
+#define ROMFH_SIZE 16
+#define ROMFH_PAD  (ROMFH_SIZE - 1)
+#define ROMFH_MASK (~ROMFH_PAD)
+
+#endif