1 #ifndef EXMEM_H
2 #define EXMEM_H
3
4 // CHDK exmem
5
6 // Note: used in modules and platform independent code.
7 // Do not add platform dependent stuff in here (#ifdef/#endif compile options or camera dependent values)
8
9 //==========================================================
10
11 // Exmem
12
13 // returned information about an exmem type
14 typedef struct
15 {
16 char *addr; // note: address always includes uncached bit (for now)
17 unsigned int len;
18 } exmem_alloc_info;
19
20 extern unsigned int exmem_type_count;
21 extern char *get_exmem_type_name(unsigned int type);
22 extern int get_exmem_type_status(unsigned int type, exmem_alloc_info *allocinf);
23
24 // allocates UNCACHED exmem region for exmem type
25 // only a single allocation by type can exist at any time, assert is thrown otherwise
26 // allocation must be freed as soon as possible, otherwise normal camera functions might become affected
27 // allocation info is returned in allocinf, if not NULL
28 extern void *exmem_alloc_uncached(unsigned int type, unsigned int size, exmem_alloc_info *allocinf);
29 // frees UNCACHED exmem region
30 // in case allocation was accessed through CPU cache, caller must flush data cache before freeing
31 extern void exmem_free_uncached(unsigned int type);
32
33 #endif