diff options
Diffstat (limited to 'kernel/include/sys.h')
| -rw-r--r-- | kernel/include/sys.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/include/sys.h b/kernel/include/sys.h index 2304eec..a9d2d4c 100644 --- a/kernel/include/sys.h +++ b/kernel/include/sys.h @@ -29,4 +29,18 @@ void panic_assert(const char* assertion, const char* file, int line); #define BOCHS_BREAKPOINT asm volatile("xchg %bx, %bx") + +// Utility functions for memory alignment + +#define PAGE_SIZE 0x1000 +#define PAGE_MASK 0xFFFFF000 +#define PAGE_ALIGN_DOWN(x) (((size_t)x) & PAGE_MASK) +#define PAGE_ALIGN_UP(x) ((((size_t)x)&(~PAGE_MASK)) == 0 ? ((size_t)x) : (((size_t)x) & PAGE_MASK) + PAGE_SIZE) +#define PAGE_ID(x) (((size_t)x) / PAGE_SIZE) + +#define MASK4 0xFFFFFFFC +#define ALIGN4_UP(x) ((((size_t)x)&(~MASK4)) == 0 ? ((size_t)x) : (((size_t)x) & MASK4) + 4) +#define ALIGN4_DOWN(x) (((size_t)x)&MASK4) + + /* vim: set ts=4 sw=4 tw=0 noet :*/ |