1 #ifndef _GPXE_MALLOC_H 2 #define _GPXE_MALLOC_H 3 4 #include <stdint.h> 5 6 /** @file 7 * 8 * Dynamic memory allocation 9 * 10 */ 11 12 FILE_LICENCE ( GPL2_OR_LATER ); 13 14 /* 15 * Prototypes for the standard functions (malloc() et al) are in 16 * stdlib.h. Include <gpxe/malloc.h> only if you need the 17 * non-standard functions, such as malloc_dma(). 18 * 19 */ 20 #include <stdlib.h> 21 22 extern size_t freemem; 23 24 extern void * __malloc alloc_memblock ( size_t size, size_t align ); 25 extern void free_memblock ( void *ptr, size_t size ); 26 extern void mpopulate ( void *start, size_t len ); 27 extern void mdumpfree ( void ); 28 29 /** 30 * Allocate memory for DMA 31 * 32 * @v size Requested size 33 * @v align Physical alignment 34 * @ret ptr Memory, or NULL 35 * 36 * Allocates physically-aligned memory for DMA. 37 * 38 * @c align must be a power of two. @c size may not be zero. 39 */ 40 static inline void * __malloc malloc_dma ( size_t size, size_t phys_align ) { 41 return alloc_memblock ( size, phys_align ); 42 } 43 44 /** 45 * Free memory allocated with malloc_dma() 46 * 47 * @v ptr Memory allocated by malloc_dma(), or NULL 48 * @v size Size of memory, as passed to malloc_dma() 49 * 50 * Memory allocated with malloc_dma() can only be freed with 51 * free_dma(); it cannot be freed with the standard free(). 52 * 53 * If @c ptr is NULL, no action is taken. 54 */ 55 static inline void free_dma ( void *ptr, size_t size ) { 56 free_memblock ( ptr, size ); 57 } 58 59 #endif /* _GPXE_MALLOC_H */ 60
