File system interface

Basic file system implementation
Path resolution work in progress

1 files changed, 18 insertions, 24 deletions

diff --git a/sw/z80/kernel/include/sio.h b/sw/z80/kernel/include/sio.h
index 9dc47f6..2efd706 100644
--- a/sw/z80/kernel/include/sio.h
+++ b/sw/z80/kernel/include/sio.h
@@ -3,8 +3,7 @@
 
 #include "types.h"
 
-#define SIO_ROM 0x0
-
+#define SIO_PORT_0 0x0
 #define SIO_PORT_1 0x1
 #define SIO_PORT_2 0x2
 #define SIO_PORT_3 0x3
@@ -13,37 +12,32 @@
 #define SIO_PORT_6 0x6
 #define SIO_PORT_7 0x7
 
-/* initialize serial interface */
-void sio_init();
+/* current port in use */
+extern uint8_t      sio_port;
 
-/* return the device address in the address space */
-void * sio_dev_addr(uint8_t dev);
-/* return the driver id to be used on dev */
-uint8_t sio_dev_driver(uint8_t dev);
+/* current seek in the device */
+extern devsize_t    sio_seek;
 
-/* set current device in use */
-void sio_set_dev(uint8_t dev);
-/* get current device in use */
-uint8_t sio_cdev();
+struct dev_buffer
+{
+   // TODO, bytes needed to the device buffer interface
+};
 
-/* get pointer in given device */
-uint16_t sio_tellg(uint8_t dev);
-/* get pointer in current device */
-uint16_t sio_ctellg();
+/* points to the buffers mapped in the I/O space */
+/* to be defined precisely in assemly */
+extern volatile struct dev_buffer sio_buffers[8];
 
-/* set pointer in given device */
-int sio_seekg(uint8_t dev, uint16_t value);
-/* set pointer in current device */
-int sio_seekg(uint16_t value);
+/* initialize serial interface */
+void sio_init();
 
 /* syscall: read one byte from the current device */
 uint8_t sio_recv();
 /* syscall: write one byte into the current device */
 void sio_send(uint8_t value);
 
-/* read n bytes from the current device */
-char * sio_read(uint8_t *buffer, size_t n);
-/* write n bytes into the current device */
-int sio_write(const uint8_t *buffer, size_t n);
+/* read n bytes from the current port */
+size_t sio_read(void *buffer, size_t n);
+/* write n bytes into the current port */
+int8_t sio_write(const void *buffer, size_t n);
 
 #endif