Import backup from 2004-07-12

kernel/block/rd.c

@@ -0,0 +1,53 @@
+
+#include "block/rd.h"
+#include "kernel.h"
+
+ramdisk_t ramdisks[256];
+char rd_refs[256];	//number of references to each ramdisk
+
+void	rd_init()
+{
+
+}
+
+int rd_register(byte *ramdisk, u32_t size)
+{
+	int i;
+	for (i = 0; i < 256; i++)
+	{
+		if (!rd_refs[i])
+		{
+			rd_refs[i]++;
+			ramdisks[i].start = ramdisk;
+			ramdisks[i].size = size;
+			return i;
+		}
+	}
+	return -1;
+}
+
+int rd_remove(minor_t minor)
+{
+	if (rd_refs[minor] <= 0)
+		return -1;
+	rd_refs[minor]--;
+	if (!rd_refs[minor])
+		free(ramdisks[minor].start);
+}
+
+int rd_read_block(minor_t minor, u32_t blockNum, u32_t count, byte *buffer)
+{
+	if (rd_refs[minor] <= 0)
+		return -1;
+	byte *copyFrom = ramdisks[minor] + (blockNum << 9);
+	if (copyFrom > ramdisks[minor].start + ramdisks[minor].size)
+		return -1;
+
+}
+
+int rd_write_block(minor_t minor, u32_t blockNum, u32_t count, byte *buffer)
+{
+
+}
+
+

kernel/block/rd.h

@@ -0,0 +1,21 @@
+
+
+#ifndef __HOS_RD_H__
+#define __HOS_RD_H__ __HOS_RD_H__
+
+#include "kernel.h"
+#include "devices.h"
+
+typedef struct {
+	byte	*start;
+	u32_t	size;
+} ramdisk_t;
+
+void rd_init();
+int rd_register(byte *ramdisk, u32_t size);
+int rd_remove(minor_t minor);
+int rd_read_block(minor_t minor, u32_t blockNum, u32_t count, byte *buffer);
+int rd_write_block(minor_t minor, u32_t blockNum, u32_t count, byte *buffer);
+
+#endif
+