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Annotation of MiNT/src/mem.h, revision 1.1.1.1

1.1       root        1: /*
                      2: 
                      3: Copyright 1990,1991,1992 Eric R. Smith. All rights reserved.
                      4: 
                      5: */
                      6: 
                      7: 
                      8: 
                      9: #ifndef _mem_h
                     10: 
                     11: #define _mem_h
                     12: 
                     13: 
                     14: 
                     15: typedef struct memregion {
                     16: 
                     17:        long    loc;            /* base of memory region */
                     18: 
                     19:        ulong   len;            /* length of memory region */
                     20: 
                     21:        ushort  links;          /* number of users of region */
                     22: 
                     23:        ushort  mflags;         /* e.g. which map this came from */
                     24: 
                     25:        struct memregion *next; /* next region in memory map */
                     26: 
                     27: } MEMREGION;
                     28: 
                     29: 
                     30: 
                     31: /* dummy type for virtual addresses */
                     32: 
                     33: typedef struct vaddr {
                     34: 
                     35:        char dummy;
                     36: 
                     37: } *virtaddr;
                     38: 
                     39: 
                     40: 
                     41: /* flags for memory regions */
                     42: 
                     43: #define M_CORE         0x01            /* region came from core map */
                     44: 
                     45: #define M_ALT          0x02            /* region came from alt map */
                     46: 
                     47: #define M_SWAP         0x04            /* region came from swap map */
                     48: 
                     49: #define M_KER          0x08            /* region came from kernel map */
                     50: 
                     51: #define M_MAP          0x0f            /* and with this to pick out map */
                     52: 
                     53: 
                     54: 
                     55: #define M_KEEP         0x0100          /* don't free on process termination */
                     56: 
                     57: 
                     58: 
                     59: /* flags for curproc->memflags */
                     60: 
                     61: #define F_FASTLOAD     0x01            /* don't zero heap */
                     62: 
                     63: #define F_ALTLOAD      0x02            /* OK to load in alternate ram */
                     64: 
                     65: #define F_ALTALLOC     0x04            /* OK to malloc from alt. ram */
                     66: 
                     67: 
                     68: 
                     69: /* flags for Malloc/Mxalloc */
                     70: 
                     71: #define F_KEEP         0x4000          /* don't free memory on termination */
                     72: 
                     73: 
                     74: 
                     75: typedef MEMREGION **MMAP;
                     76: 
                     77: extern MMAP core, alt, ker, swap;
                     78: 
                     79: 
                     80: 
                     81: /* compilers differ on what "sizeof" returns */
                     82: 
                     83: #define SIZEOF         (long)sizeof
                     84: 
                     85: 
                     86: 
                     87: /* MiNT leaves this much memory for TOS to use
                     88: 
                     89:  */
                     90: 
                     91: #define TOS_MEM                (8*1024L)
                     92: 
                     93: 
                     94: 
                     95: /* MiNT tries to keep this much memory available for the kernel and other
                     96: 
                     97:  * programs when a program is launched
                     98: 
                     99:  */
                    100: 
                    101: #define KEEP_MEM       (8*1024L)
                    102: 
                    103: 
                    104: 
                    105: /*
                    106: 
                    107:  * how much memory should be allocated to the kernel?
                    108: 
                    109:  */
                    110: 
                    111: #define KERNEL_MEM     (24*1024L)
                    112: 
                    113: 
                    114: 
                    115: /* macro for rounding off region sizes */
                    116: 
                    117: #define MASKBITS       0xf
                    118: 
                    119: #define ROUND(size) ((size + MASKBITS) & ~MASKBITS)
                    120: 
                    121: 
                    122: 
                    123: #endif /* _mem_h */
                    124: 

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