Move sw to sw-old and hw to hw-altium, add kicad files

1 files changed, 43 insertions, 0 deletions

diff --git a/sw-old/z80/kernel/include/process.h b/sw-old/z80/kernel/include/process.h
new file mode 100644
index 0000000..3b0c843
--- /dev/null
+++ b/sw-old/z80/kernel/include/process.h
@@ -0,0 +1,43 @@
+#ifndef __PROCESS_H__
+#define __PROCESS_H__
+
+#include "types.h"
+#include "memory.h"
+
+ /* maximum number of processes (i.e. pages in ram)
+  * since each program can use only one page in ram
+  */
+#define PROC_COUNT 2 
+
+/* the pid is defined with a single byte (pid_t is uint8_t), because of that 
+ * there cannot be more than 255 processes open at the same time. this is a
+ * limitation but for our purposes is more than enough
+ */
+#define PID_COUNT_MAX 255
+
+struct executable
+{
+    void *text;
+    size_t text_size;
+    void *bss;
+    size_t bss_size;
+};
+
+struct process
+{
+    uint blocked :1;      // process is waiting for hardware or locked
+    uint running :1;      // pid is used
+    uint pages;           // number of pages used by the process
+    struct page page[4];  // pages used by the process
+};
+
+pid_t newpid(void);
+
+int fork(void);
+int exec(char *path, char *args);
+int spawn(char *path, char *args);
+
+pid_t getpid(void);
+int kill(pid_t pid);
+
+#endif // __PROCESS_H__