projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| bc22c17e AK |
1 | /* |
| 2 | * linux/compr_mm.h | |
| 3 | * | |
| 4 | * Memory management for pre-boot and ramdisk uncompressors | |
| 5 | * | |
| 6 | * Authors: Alain Knaff <alain@knaff.lu> | |
| 7 | * | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef DECOMPR_MM_H | |
| 11 | #define DECOMPR_MM_H | |
| 12 | ||
| 13 | #ifdef STATIC | |
| 14 | ||
| 15 | /* Code active when included from pre-boot environment: */ | |
| 16 | ||
| 17 | /* A trivial malloc implementation, adapted from | |
| 18 | * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994 | |
| 19 | */ | |
| 20 | static unsigned long malloc_ptr; | |
| 21 | static int malloc_count; | |
| 22 | ||
| 23 | static void *malloc(int size) | |
| 24 | { | |
| 25 | void *p; | |
| 26 | ||
| 27 | if (size < 0) | |
| c1e7c3ae | 28 | return NULL; |
| bc22c17e AK |
29 | if (!malloc_ptr) |
| 30 | malloc_ptr = free_mem_ptr; | |
| 31 | ||
| 32 | malloc_ptr = (malloc_ptr + 3) & ~3; /* Align */ | |
| 33 | ||
| 34 | p = (void *)malloc_ptr; | |
| 35 | malloc_ptr += size; | |
| 36 | ||
| 37 | if (free_mem_end_ptr && malloc_ptr >= free_mem_end_ptr) | |
| c1e7c3ae | 38 | return NULL; |
| bc22c17e AK |
39 | |
| 40 | malloc_count++; | |
| 41 | return p; | |
| 42 | } | |
| 43 | ||
| 44 | static void free(void *where) | |
| 45 | { | |
| 46 | malloc_count--; | |
| 47 | if (!malloc_count) | |
| 48 | malloc_ptr = free_mem_ptr; | |
| 49 | } | |
| 50 | ||
| 51 | #define large_malloc(a) malloc(a) | |
| 52 | #define large_free(a) free(a) | |
| 53 | ||
| 54 | #define set_error_fn(x) | |
| 55 | ||
| 56 | #define INIT | |
| 57 | ||
| 58 | #else /* STATIC */ | |
| 59 | ||
| 60 | /* Code active when compiled standalone for use when loading ramdisk: */ | |
| 61 | ||
| 62 | #include <linux/kernel.h> | |
| 63 | #include <linux/fs.h> | |
| 64 | #include <linux/string.h> | |
| 65 | #include <linux/vmalloc.h> | |
| 66 | ||
| 67 | /* Use defines rather than static inline in order to avoid spurious | |
| 68 | * warnings when not needed (indeed large_malloc / large_free are not | |
| 69 | * needed by inflate */ | |
| 70 | ||
| 71 | #define malloc(a) kmalloc(a, GFP_KERNEL) | |
| 72 | #define free(a) kfree(a) | |
| 73 | ||
| 74 | #define large_malloc(a) vmalloc(a) | |
| 75 | #define large_free(a) vfree(a) | |
| 76 | ||
| 77 | static void(*error)(char *m); | |
| 78 | #define set_error_fn(x) error = x; | |
| 79 | ||
| 80 | #define INIT __init | |
| 81 | #define STATIC | |
| 82 | ||
| 83 | #include <linux/init.h> | |
| 84 | ||
| 85 | #endif /* STATIC */ | |
| 86 | ||
| 87 | #endif /* DECOMPR_MM_H */ |