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	vm_offset_t high_heap_base;			vm_offset_t high_heap_base;
	uint32_t bios_basemem, bios_extmem, high_heap_size;			uint32_t bios_basemem, bios_extmem, high_heap_size;

	static struct bios_smap smap;			static struct bios_smap smap;

	/*			/*
	* The minimum amount of memory to reserve in bios_extmem for the heap.			* The minimum amount of memory to reserve in bios_extmem for the heap.
	*/			*/
	#define HEAP_MIN (3 * 1024 * 1024)			#define HEAP_MIN (64 * 1024 * 1024)

	static char *heap_next;			static char *heap_next;
	static char *heap_end;			static char *heap_end;

	/* Buffers that must not span a 64k boundary. */			/* Buffers that must not span a 64k boundary. */
	#define READ_BUF_SIZE 8192			#define READ_BUF_SIZE 8192
	struct dmadat {			struct dmadat {
	char rdbuf[READ_BUF_SIZE]; /* for reading large things */			char rdbuf[READ_BUF_SIZE]; /* for reading large things */
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