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Commit d4b18bd6 authored by Geoff Levand's avatar Geoff Levand Committed by Michael Ellerman
Browse files

powerpc/ps3: Add ps3_mm_set_repository_highmem 



Add the new routine ps3_mm_set_repository_highmem() that saves highmem info to
the LV1 hypervisor registry so that the info will be available to second stage
OS's loaded by petitboot/kexec. FreeBSD and some Linux derivatives use
this feature.

Also, move the existing ps3_mm_get_repository_highmem() routine up in
the source file.

This implementation of ps3_mm_set_repository_highmem() assumes the repository
will have a single highmem region entry (at index 0).

Signed-off-by: default avatarGeoff Levand <geoff@infradead.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent c02d3506

arch/powerpc/platforms/ps3/mm.c

+38 −30
Original line number Diff line number Diff line
@@ -223,6 +223,44 @@ void ps3_mm_vas_destroy(void) 
	}

}



static int ps3_mm_get_repository_highmem(struct mem_region *r)

{

	int result;



	/* Assume a single highmem region. */



	result = ps3_repository_read_highmem_info(0, &r->base, &r->size);



	if (result)

		goto zero_region;



	if (!r->base || !r->size) {

		result = -1;

		goto zero_region;

	}



	r->offset = r->base - map.rm.size;



	DBG("%s:%d: Found high region in repository: %llxh %llxh\n",

	    __func__, __LINE__, r->base, r->size);



	return 0;



zero_region:

	DBG("%s:%d: No high region in repository.\n", __func__, __LINE__);



	r->size = r->base = r->offset = 0;

	return result;

}



static int ps3_mm_set_repository_highmem(const struct mem_region *r)

{

	/* Assume a single highmem region. */



	return r ? ps3_repository_write_highmem_info(0, r->base, r->size) :

		ps3_repository_write_highmem_info(0, 0, 0);

}



/**

 * ps3_mm_region_create - create a memory region in the vas

 * @r: pointer to a struct mem_region to accept initialized values
@@ -293,36 +331,6 @@ static void ps3_mm_region_destroy(struct mem_region *r) 
	}

}



static int ps3_mm_get_repository_highmem(struct mem_region *r)

{

	int result;



	/* Assume a single highmem region. */



	result = ps3_repository_read_highmem_info(0, &r->base, &r->size);



	if (result)

		goto zero_region;



	if (!r->base || !r->size) {

		result = -1;

		goto zero_region;

	}



	r->offset = r->base - map.rm.size;



	DBG("%s:%d: Found high region in repository: %llxh %llxh\n",

	    __func__, __LINE__, r->base, r->size);



	return 0;



zero_region:

	DBG("%s:%d: No high region in repository.\n", __func__, __LINE__);



	r->size = r->base = r->offset = 0;

	return result;

}



/*============================================================================*/

/* dma routines                                                               */

/*============================================================================*/