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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: Geoff Levand <geoff@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Geoff Levand 2015-01-13 01:00:20 +00:00 committed by Michael Ellerman
parent c02d350673
commit d4b18bd675
1 changed files with 38 additions and 30 deletions
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68
arch/powerpc/platforms/ps3/mm.c
View File

@ -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 */
/*============================================================================*/