72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/*
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* $QNXLicenseC:
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* Copyright 2007, QNX Software Systems. All Rights Reserved.
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*
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* You must obtain a written license from and pay applicable
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* license fees to QNX Software Systems before you may reproduce,
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* modify or distribute this software, or any work that includes
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* all or part of this software. Free development licenses are
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* available for evaluation and non-commercial purposes. For more
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* information visit http://licensing.qnx.com or email
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* licensing@qnx.com.
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*
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* This file may contain contributions from others. Please review
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* this entire file for other proprietary rights or license notices,
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* as well as the QNX Development Suite License Guide at
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* http://licensing.qnx.com/license-guide/ for other information.
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* $
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*/
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#include "kdintl.h"
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#define ROUND(v, r) ((v) + ((r)-1) & ~((r)-1))
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struct meminfo {
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struct asinfo_entry *as;
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unsigned size;
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unsigned align;
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paddr64_t start;
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};
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static int
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carve_mem(struct asinfo_entry *as, char *name, void *data) {
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struct meminfo *mem = data;
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paddr64_t start;
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start = ROUND(as->start, mem->align);
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if(((as->end - start) > mem->size) && (mem->start > start)) {
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mem->start = start;
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mem->as = as;
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}
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return 1;
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}
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paddr64_t
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alloc_pmem(unsigned size, unsigned align) {
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struct meminfo mem;
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if(private->kdebug_info != 0) {
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// if kdebug_info is filled in, the kernel has started and
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// we can't allocate any more memory
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return ~(paddr64_t)0;
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}
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if(align == 0) align = sizeof(uint64_t);
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mem.as = NULL;
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mem.start = ~(paddr64_t)0;
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mem.align = align;
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mem.size = ROUND(size, align);
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walk_asinfo("sysram", carve_mem, &mem);
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if(mem.as == NULL) {
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// no memory
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return ~(paddr64_t)0;
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}
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mem.as->start = mem.start + mem.size;
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return mem.start;
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}
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