/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __UM_FIXMAP_H #define __UM_FIXMAP_H #include <asm/processor.h> #include <asm/kmap_types.h> #include <asm/archparam.h> #include <asm/page.h> #include <linux/threads.h> /* * Here we define all the compile-time 'special' virtual * addresses. The point is to have a constant address at * compile time, but to set the physical address only * in the boot process. We allocate these special addresses * from the end of virtual memory (0xfffff000) backwards. * Also this lets us do fail-safe vmalloc(), we * can guarantee that these special addresses and * vmalloc()-ed addresses never overlap. * * these 'compile-time allocated' memory buffers are * fixed-size 4k pages. (or larger if used with an increment * highger than 1) use fixmap_set(idx,phys) to associate * physical memory with fixmap indices. * * TLB entries of such buffers will not be flushed across * task switches. */ /* * on UP currently we will have no trace of the fixmap mechanizm, * no page table allocations, etc. This might change in the * future, say framebuffers for the console driver(s) could be * fix-mapped? */ enum fixed_addresses { __end_of_fixed_addresses }; extern void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags); /* * used by vmalloc.c. * * Leave one empty page between vmalloc'ed areas and * the start of the fixmap, and leave one page empty * at the top of mem.. */ #define FIXADDR_TOP (TASK_SIZE - 2 * PAGE_SIZE) #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) #include <asm-generic/fixmap.h> #endifOverall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jeff Dike | 55 | 85.94% | 4 | 50.00% |
| Mark Salter | 3 | 4.69% | 1 | 12.50% |
| Al Viro | 3 | 4.69% | 1 | 12.50% |
| Bodo Stroesser | 2 | 3.12% | 1 | 12.50% |
| Greg Kroah-Hartman | 1 | 1.56% | 1 | 12.50% |
| Total | 64 | 100.00% | 8 | 100.00% |