From b14d0afe86966b91ad6a40816439cdc34602b49e Mon Sep 17 00:00:00 2001 From: Nao Pross Date: Tue, 4 Jul 2017 11:35:23 +0200 Subject: new structure for process management, structures to discuss the idea behind kernel/include/progman.h was good but the implementation was very not unix-like, so I made a new file under kernel/include/process.h that will implement the same features other changes: - move usart register structs definitions outside of the device - remove old build files - delete boot.h and boot_loader.h (as they weren't used by anything) - change on makefile to build binary with `makebin` instead of `xxd` - new file memory.h to implement memory mapping and mmu control - new type `uint` in types.h --- sw/z80/kernel/include/process.h | 42 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 sw/z80/kernel/include/process.h (limited to 'sw/z80/kernel/include/process.h') diff --git a/sw/z80/kernel/include/process.h b/sw/z80/kernel/include/process.h new file mode 100644 index 0000000..ffd39e7 --- /dev/null +++ b/sw/z80/kernel/include/process.h @@ -0,0 +1,42 @@ +#ifndef __PROCESS_H__ +#define __PROCESS_H__ + +#include "types.h" + + /* maximum number of processes (i.e. pages in ram) + * since each program can use only one page in ram + */ +#define PROC_COUNT 2 + +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[4]; // pages used by the process + // TODO: implement quick callback? +}; + +/* 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 + */ +extern struct process proc_table[255]; + +static 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__ -- cgit v1.2.1