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38 lines
1.4 KiB
38 lines
1.4 KiB
/* memory.h - roundmb, truncmb, freestk */ |
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#define PAGE_SIZE 4096 |
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/*---------------------------------------------------------------------- |
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* roundmb, truncmb - Round or truncate address to memory block size |
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*---------------------------------------------------------------------- |
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*/ |
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#define roundmb(x) (char *)( (7 + (uint32)(x)) & (~7) ) |
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#define truncmb(x) (char *)( ((uint32)(x)) & (~7) ) |
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/*---------------------------------------------------------------------- |
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* freestk -- Free stack memory allocated by getstk |
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*---------------------------------------------------------------------- |
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*/ |
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#define freestk(p,len) freemem((char *)((uint32)(p) \ |
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- ((uint32)roundmb(len)) \ |
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+ (uint32)sizeof(uint32)), \ |
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(uint32)roundmb(len) ) |
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struct memblk { /* See roundmb & truncmb */ |
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struct memblk *mnext; /* Ptr to next free memory blk */ |
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uint32 mlength; /* Size of blk (includes memblk)*/ |
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}; |
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extern struct memblk memlist; /* Head of free memory list */ |
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extern void *minheap; /* Start of heap */ |
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extern void *maxheap; /* Highest valid heap address */ |
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/* Added by linker */ |
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extern int text; /* Start of text segment */ |
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extern int etext; /* End of text segment */ |
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extern int data; /* Start of data segment */ |
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extern int edata; /* End of data segment */ |
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extern int bss; /* Start of bss segment */ |
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extern int ebss; /* End of bss segment */ |
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extern int end; /* End of program */
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