| #ifndef ROS_INC_MEMLAYOUT_H |
| #define ROS_INC_MEMLAYOUT_H |
| |
| #ifndef __ASSEMBLER__ |
| #include <ros/common.h> |
| #endif /* not __ASSEMBLER__ */ |
| |
| #include <ros/arch/mmu.h> |
| |
| /* |
| * This file contains definitions for memory management in our OS, |
| * which are relevant to both the kernel and user-mode software. |
| */ |
| |
| /* TODO: sort out multiboot being in src/ (depends on this) */ |
| #ifndef EXTPHYSMEM |
| #define EXTPHYSMEM 0x100000 |
| #endif |
| |
| #define KSTKSHIFT (PGSHIFT + 1) /* KSTKSIZE == PGSIZE */ |
| #define KSTKSIZE (1 << KSTKSHIFT) /* size of a static kernel stack */ |
| |
| /* Read-only, per-process shared info structures */ |
| #define UINFO (UVPT - PTSIZE) |
| /* Top of user-writable VM */ |
| #define UWLIM UINFO |
| /* Read-write, per-process shared info structures */ |
| #define UDATA (UWLIM - PTSIZE) |
| /* Read-write, global page. Shared by all processes. */ |
| #define UGDATA (UDATA - PGSIZE) |
| /* Limit of what is mmap()/munmap()-able */ |
| #define UMAPTOP UGDATA |
| /* Top of normal user stack */ |
| #define USTACKTOP UMAPTOP |
| /* Stack size of thread0, allocated by the kernel */ |
| #define USTACK_NUM_PAGES 256 |
| |
| #endif /* !ROS_INC_MEMLAYOUT_H */ |
