1 files changed, 80 insertions, 0 deletions
diff --git a/package/aboot/src/fs/dummy.c b/package/aboot/src/fs/dummy.c
new file mode 100644
index 000000000..82d73d441
--- /dev/null
+++ b/package/aboot/src/fs/dummy.c
@@ -0,0 +1,80 @@
+/*
+ * This is a set of functions that provides access to a Linux kernel
+ * starting at sector BOOT_SECT+aboot_size/SECT_SIZE
+ *
+ * Michael Schwingen (rincewind@discworld.oche.de).
+ */
+#include "system.h"
+
+#include <config.h>
+#include <aboot.h>
+#include <bootfs.h>
+#include <cons.h>
+#include <utils.h>
+
+#define BLOCKSIZE (16*SECT_SIZE)
+
+static int dummy_mount(long cons_dev, long p_offset, long quiet);
+static int dummy_bread(int fd, long blkno, long nblks, char *buffer);
+static int dummy_open(const char *filename);
+static void dummy_close(int fd);
+
+struct bootfs dummyfs = {
+	0, BLOCKSIZE,
+	dummy_mount,
+	dummy_open,  dummy_bread,  dummy_close
+};
+
+static long dev = -1;
+
+
+/*
+ * Initialize 'filesystem' 
+ * Returns 0 if successful, -1 on failure.
+ */
+static int
+dummy_mount(long cons_dev, long p_offset, long quiet)
+{
+	dev = cons_dev;
+	return 0;
+}
+
+
+/*
+ * Read block number "blkno".
+ */
+static int
+dummy_bread(int fd, long blkno, long nblks, char *buffer)
+{
+	extern char _end;
+	static long aboot_size = 0;
+
+	if (!aboot_size) {
+		aboot_size = &_end - (char *) BOOT_ADDR + SECT_SIZE - 1;
+		aboot_size &= ~(SECT_SIZE - 1);
+	}
+
+	if (cons_read(dev, buffer, nblks*BLOCKSIZE, 
+		      BOOT_SECTOR*SECT_SIZE + blkno*BLOCKSIZE + aboot_size)
+	    != nblks*BLOCKSIZE)
+	{
+		printf("dummy_bread: read error\n");
+		return -1;
+	}
+	return nblks*BLOCKSIZE;
+}
+
+
+/*
+ * Unix-like open routine.  Returns a small integer 
+ * (does not care what file, we say it's OK)
+ */
+static int dummy_open(const char *filename)
+{
+	return 1;
+}
+
+
+static void dummy_close(int fd)
+{
+}