lots of new stuff. new memory manager, some stuff on file plumbing

1 files changed, 52 insertions, 0 deletions

diff --git a/src/kernel/diskio.h b/src/kernel/diskio.h
new file mode 100644
index 0000000..2f83864
--- /dev/null
+++ b/src/kernel/diskio.h
@@ -0,0 +1,52 @@
+/*
+Copyright 2019 Benji Dial
+
+Permission to use, copy, modify, and/or 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 <stdint.h>
+#include <stdbool.h>
+
+#ifndef DISKIO_H
+#define DISKIO_H
+
+enum interface {
+  FLOPPY,
+  IDE,
+  ATA
+};
+
+enum drive_flags {
+  SPUN    = 0x01,
+  DISK_IN = 0x02,
+  PRESENT = 0x04
+};
+
+struct drive_info {
+  uint8_t interface;
+  uint8_t number;
+  uint8_t flags;
+  uint8_t ssize;//log_2 of B
+  uint32_t length;//in kiB/2
+};
+
+struct drive_info drives[26];
+
+uint32_t read_sectors(uint8_t drive, uint32_t start, uint32_t count, void *buffer);
+uint32_t write_sectors(uint8_t drive, uint32_t start, uint32_t count, void *buffer);
+void update_status(uint8_t drive);
+
+#endif
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