Differential D32962 Diff 98757 sys/amd64/include/vmparam.h

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sys/amd64/include/vmparam.h

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	#define VM_MIN_ADDRESS (0)			#define VM_MIN_ADDRESS (0)

	/*			/*
	* XXX Allowing dmaplimit == 0 is a temporary workaround for vt(4) efifb's			* XXX Allowing dmaplimit == 0 is a temporary workaround for vt(4) efifb's
	* early use of PHYS_TO_DMAP before the mapping is actually setup. This works			* early use of PHYS_TO_DMAP before the mapping is actually setup. This works
	* because the result is not actually accessed until later, but the early			* because the result is not actually accessed until later, but the early
	* vt fb startup needs to be reworked.			* vt fb startup needs to be reworked.
	*/			*/
				#define PHYS_IN_DMAP(pa) (dmaplimit == 0 \|\| (pa) < dmaplimit)
				#define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \
				(va) < (DMAP_MIN_ADDRESS + dmaplimit))

	#define PMAP_HAS_DMAP 1			#define PMAP_HAS_DMAP 1
	#define PHYS_TO_DMAP(x) ({ \			#define PHYS_TO_DMAP(x) ({ \
	KASSERT(dmaplimit == 0 \|\| (x) < dmaplimit, \			KASSERT(PHYS_IN_DMAP(x), \
	("physical address %#jx not covered by the DMAP", \			("physical address %#jx not covered by the DMAP", \
	(uintmax_t)x)); \			(uintmax_t)x)); \
	(x) \| DMAP_MIN_ADDRESS; })			(x) \| DMAP_MIN_ADDRESS; })

	#define DMAP_TO_PHYS(x) ({ \			#define DMAP_TO_PHYS(x) ({ \
	KASSERT((x) < (DMAP_MIN_ADDRESS + dmaplimit) && \			KASSERT(VIRT_IN_DMAP(x), \
	(x) >= DMAP_MIN_ADDRESS, \
	("virtual address %#jx not covered by the DMAP", \			("virtual address %#jx not covered by the DMAP", \
	(uintmax_t)x)); \			(uintmax_t)x)); \
	(x) & ~DMAP_MIN_ADDRESS; })			(x) & ~DMAP_MIN_ADDRESS; })

	/*			/*
	* amd64 maps the page array into KVA so that it can be more easily			* amd64 maps the page array into KVA so that it can be more easily
	* allocated on the correct memory domains.			* allocated on the correct memory domains.
	*/			*/
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