From 29478baf24532391cd94bd08d94cf867dee976e6 Mon Sep 17 00:00:00 2001
From: James Barnett <noreply@jamesbarnett.xyz>
Date: Sun, 6 Oct 2019 18:39:36 +0100
Subject: Start on ram backed filesystem

---
 os/filesystem/ramfs.c | 27 +++++++++++++++++++++++++++
 os/filesystem/ramfs.h | 10 ++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 os/filesystem/ramfs.c
 create mode 100644 os/filesystem/ramfs.h

(limited to 'os/filesystem')

diff --git a/os/filesystem/ramfs.c b/os/filesystem/ramfs.c
new file mode 100644
index 0000000..0c0fdff
--- /dev/null
+++ b/os/filesystem/ramfs.c
@@ -0,0 +1,27 @@
+#include "ramfs.h"
+#include "../../kernel/gpu/text_mode/display.h"
+
+#include "../stdlib/sdtlib.h"
+
+#define RAMDISK_SIZE 102400 // 100 blocks
+#define BLOCK_SIZE 1024
+#define MAX_FILES 128 // fixed size until mem management done
+
+unsigned char ramdisk[RAMDISK_SIZE];
+
+File_t files[MAX_FILES];
+int tip_file_idx = -1;
+
+File_t* ramfs_list_files() {
+  return files;
+}
+
+int ramfs_get_tip_file_idx() {
+  return tip_file_idx;
+}
+
+File_t ramfs_create_file(unsigned char *filename) {
+  int i = ++tip_file_idx;
+  strcpy(filename, files[i].name);
+  return files[i];
+}
diff --git a/os/filesystem/ramfs.h b/os/filesystem/ramfs.h
new file mode 100644
index 0000000..c0dd147
--- /dev/null
+++ b/os/filesystem/ramfs.h
@@ -0,0 +1,10 @@
+typedef struct
+{
+  char name[128]; // 128 max filename lentgh
+  int start_addr;
+  int end_addr;
+} File_t;
+
+File_t ramfs_create_file(unsigned char * filename);
+File_t* ramfs_list_files();
+int ramfs_get_tip_file_idx();
\ No newline at end of file
-- 
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