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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/linux/decompress/mm.h
4 * Memory management for pre-boot and ramdisk uncompressors
6 * Authors: Alain Knaff <alain@knaff.lu>
15 /* Code active when included from pre-boot environment: */
18 * Some architectures want to ensure there is no local data in their
19 * pre-boot environment, so that data can arbitrarily relocated (via
20 * GOT references). This is achieved by defining STATIC_RW_DATA to
23 #ifndef STATIC_RW_DATA
24 #define STATIC_RW_DATA static
27 /* A trivial malloc implementation, adapted from
28 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
30 STATIC_RW_DATA
unsigned long malloc_ptr
;
31 STATIC_RW_DATA
int malloc_count
;
33 static void *malloc(int size
)
40 malloc_ptr
= free_mem_ptr
;
42 malloc_ptr
= (malloc_ptr
+ 3) & ~3; /* Align */
44 p
= (void *)malloc_ptr
;
47 if (free_mem_end_ptr
&& malloc_ptr
>= free_mem_end_ptr
)
54 static void free(void *where
)
58 malloc_ptr
= free_mem_ptr
;
61 #define large_malloc(a) malloc(a)
62 #define large_free(a) free(a)
68 /* Code active when compiled standalone for use when loading ramdisk: */
70 #include <linux/kernel.h>
72 #include <linux/string.h>
73 #include <linux/slab.h>
74 #include <linux/vmalloc.h>
76 /* Use defines rather than static inline in order to avoid spurious
77 * warnings when not needed (indeed large_malloc / large_free are not
78 * needed by inflate */
80 #define malloc(a) kmalloc(a, GFP_KERNEL)
81 #define free(a) kfree(a)
83 #define large_malloc(a) vmalloc(a)
84 #define large_free(a) vfree(a)
89 #include <linux/init.h>
93 #endif /* DECOMPR_MM_H */