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Commit 729d69e6 authored by Robin Holt's avatar Robin Holt Committed by Linus Torvalds
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x86: uv: introduce a means to translate from gpa -> socket_paddr 



The UV BIOS has been updated to implement some of our interface
functionality differently than originally expected.  These patches update
the kernel to the bios implementation and include a few minor bug fixes
which prevent us from doing significant testing on real hardware.

This patch:

For SGI UV systems, translate from a global physical address back to a
socket physical address.  This does nothing to ensure the socket physical
address is actually addressable by the kernel.  That is the responsibility
of the user of the function.

Signed-off-by: default avatarRobin Holt <holt@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5fe878ae

arch/x86/include/asm/uv/uv_hub.h

+13 −0
Original line number Diff line number Diff line
@@ -232,6 +232,19 @@ static inline unsigned long uv_gpa(void *v) 
	return uv_soc_phys_ram_to_gpa(__pa(v));

}



/* UV global physical address --> socket phys RAM */

static inline unsigned long uv_gpa_to_soc_phys_ram(unsigned long gpa)

{

	unsigned long paddr = gpa & uv_hub_info->gpa_mask;

	unsigned long remap_base = uv_hub_info->lowmem_remap_base;

	unsigned long remap_top =  uv_hub_info->lowmem_remap_top;



	if (paddr >= remap_base && paddr < remap_base + remap_top)

		paddr -= remap_base;

	return paddr;

}





/* gnode -> pnode */

static inline unsigned long uv_gpa_to_gnode(unsigned long gpa)

{