static int spu_map_resource(struct spu *spu, int nr,
void __iomem** virt, unsigned long *phys)
{
struct device_node *np = spu->devnode;
unsigned long start_pfn, nr_pages;
struct pglist_data *pgdata;
struct zone *zone;
struct resource resource = { };
unsigned long len;
int ret;
ret = of_address_to_resource(np, nr, &resource);
if (ret)
goto out;
if (phys)
*phys = resource.start;
len = resource.end - resource.start + 1;
*virt = ioremap(resource.start, len);
if (!*virt)
ret = -EINVAL;
start_pfn = resource.start >> PAGE_SHIFT;
nr_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
pgdata = NODE_DATA(spu->node);
zone = pgdata->node_zones;
ret = __add_pages(zone, start_pfn, nr_pages);
out:
return ret;
}
static int __init cell_spuprop_present(struct spu *spu, struct device_node *spe,
const char *prop)
{
const struct address_prop {
unsigned long address;
unsigned int len;
} __attribute__((packed)) *p;
int proplen;
unsigned long start_pfn, nr_pages;
struct pglist_data *pgdata;
struct zone *zone;
int ret;
p = get_property(spe, prop, &proplen);
WARN_ON(proplen != sizeof (*p));
start_pfn = p->address >> PAGE_SHIFT;
nr_pages = ((unsigned long)p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
pgdata = NODE_DATA(spu->node);
zone = pgdata->node_zones;
ret = __add_pages(zone, start_pfn, nr_pages);
return ret;
}
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
{
struct pglist_data *pgdata;
struct zone *zone;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
int rc;
resize_hpt_for_hotplug(memblock_phys_mem_size());
pgdata = NODE_DATA(nid);
start = (unsigned long)__va(start);
rc = create_section_mapping(start, start + size);
if (rc) {
pr_warning(
"Unable to create mapping for hot added memory 0x%llx..0x%llx: %d\n",
start, start + size, rc);
return -EFAULT;
}
/* this should work for most non-highmem platforms */
zone = pgdata->node_zones +
zone_for_memory(nid, start, size, 0, for_device);
return __add_pages(nid, zone, start_pfn, nr_pages);
}
int arch_add_memory(u64 start, u64 size)
{
struct pglist_data *pgdata = &contig_page_data;
struct zone *zone = pgdata->node_zones + MAX_NR_ZONES-1;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
return __add_pages(zone, start_pfn, nr_pages);
}
int arch_add_memory(int nid, u64 start, u64 size)
{
struct pglist_data *pgdat;
struct zone *zone;
int rc;
pgdat = NODE_DATA(nid);
zone = pgdat->node_zones + ZONE_MOVABLE;
rc = vmem_add_mapping(start, size);
if (rc)
return rc;
rc = __add_pages(nid, zone, PFN_DOWN(start), PFN_DOWN(size));
if (rc)
vmem_remove_mapping(start, size);
return rc;
}
int arch_add_memory(int nid, u64 start, u64 size)
{
pg_data_t *pgdat;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
pgdat = NODE_DATA(nid);
/* We only have ZONE_NORMAL, so this is easy.. */
ret = __add_pages(pgdat->node_zones + ZONE_NORMAL, start_pfn, nr_pages);
if (unlikely(ret))
printk("%s: Failed, __add_pages() == %d\n", __func__, ret);
return ret;
}
/*
* This works only for the non-NUMA case. Later, we'll need a lookup
* to convert from real physical addresses to nid, that doesn't use
* pfn_to_nid().
*/
int __devinit add_memory(u64 start, u64 size)
{
struct pglist_data *pgdata = NODE_DATA(0);
struct zone *zone;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
start += KERNELBASE;
create_section_mapping(start, start + size);
/* this should work for most non-highmem platforms */
zone = pgdata->node_zones;
return __add_pages(zone, start_pfn, nr_pages);
return 0;
}
static void setup_grant_area(void)
{
ulong pgs;
int err;
struct zone *zone;
struct pglist_data *pgdata;
int nid;
pgs = find_grant_maps();
setup_foreign_segment();
printk("%s: Xen VIO will use a foreign address space of 0x%lx pages\n",
__func__, pgs);
/* add pages to the zone */
nid = 0;
pgdata = NODE_DATA(nid);
zone = pgdata->node_zones;
err = __add_pages(zone, foreign_map_pfn, pgs);
if (err < 0) {
printk(KERN_EMERG "%s: add_pages(0x%lx, 0x%lx) = %d\n",
__func__, foreign_map_pfn, pgs, err);
BUG();
}
/* create a bitmap to manage these pages */
foreign_map_bitmap = kmalloc(BITS_TO_LONGS(pgs) * sizeof(long),
GFP_KERNEL);
if (foreign_map_bitmap == NULL) {
printk(KERN_EMERG
"%s: could not allocate foreign_map_bitmap to "
"manage 0x%lx foreign pages\n", __func__, pgs);
BUG();
}
/* I'm paranoid so make sure we assign the top bits so we
* don't give them away */
bitmap_fill(&foreign_map_bitmap[BITS_TO_LONGS(pgs) - 1],
BITS_PER_LONG);
/* now clear all the real bits */
bitmap_zero(foreign_map_bitmap, pgs);
foreign_map_pgs = pgs;
}
int arch_add_memory(int nid, u64 start, u64 size)
{
struct pglist_data *pgdata;
struct zone *zone;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
pgdata = NODE_DATA(nid);
start = (unsigned long)__va(start);
if (create_section_mapping(start, start + size))
return -EINVAL;
/* this should work for most non-highmem platforms */
zone = pgdata->node_zones;
return __add_pages(nid, zone, start_pfn, nr_pages);
}
/*
* Memory is added always to NORMAL zone. This means you will never get
* additional DMA/DMA32 memory.
*/
int arch_add_memory(int nid, u64 start, u64 size)
{
struct pglist_data *pgdat = NODE_DATA(nid);
struct zone *zone = pgdat->node_zones + ZONE_NORMAL;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
init_memory_mapping(start, (start + size -1));
ret = __add_pages(zone, start_pfn, nr_pages);
if (ret)
goto error;
return ret;
error:
printk("%s: Problem encountered in __add_pages!\n", __func__);
return ret;
}
int __meminit arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
bool want_memblock)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
int rc;
resize_hpt_for_hotplug(memblock_phys_mem_size());
start = (unsigned long)__va(start);
rc = create_section_mapping(start, start + size, nid);
if (rc) {
pr_warn("Unable to create mapping for hot added memory 0x%llx..0x%llx: %d\n",
start, start + size, rc);
return -EFAULT;
}
flush_inval_dcache_range(start, start + size);
return __add_pages(nid, start_pfn, nr_pages, altmap, want_memblock);
}
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
{
unsigned long zone_start_pfn, zone_end_pfn, nr_pages;
unsigned long start_pfn = PFN_DOWN(start);
unsigned long size_pages = PFN_DOWN(size);
struct zone *zone;
int rc;
rc = vmem_add_mapping(start, size);
if (rc)
return rc;
for_each_zone(zone) {
if (zone_idx(zone) != ZONE_MOVABLE) {
/* Add range within existing zone limits */
zone_start_pfn = zone->zone_start_pfn;
zone_end_pfn = zone->zone_start_pfn +
zone->spanned_pages;
} else {
/* Add remaining range to ZONE_MOVABLE */
zone_start_pfn = start_pfn;
zone_end_pfn = start_pfn + size_pages;
}
if (start_pfn < zone_start_pfn || start_pfn >= zone_end_pfn)
continue;
nr_pages = (start_pfn + size_pages > zone_end_pfn) ?
zone_end_pfn - start_pfn : size_pages;
rc = __add_pages(nid, zone, start_pfn, nr_pages);
if (rc)
break;
start_pfn += nr_pages;
size_pages -= nr_pages;
if (!size_pages)
break;
}
if (rc)
vmem_remove_mapping(start, size);
return rc;
}
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
{
unsigned long normal_end_pfn = PFN_DOWN(memblock_end_of_DRAM());
unsigned long dma_end_pfn = PFN_DOWN(MAX_DMA_ADDRESS);
unsigned long start_pfn = PFN_DOWN(start);
unsigned long size_pages = PFN_DOWN(size);
unsigned long nr_pages;
int rc, zone_enum;
rc = vmem_add_mapping(start, size);
if (rc)
return rc;
while (size_pages > 0) {
if (start_pfn < dma_end_pfn) {
nr_pages = (start_pfn + size_pages > dma_end_pfn) ?
dma_end_pfn - start_pfn : size_pages;
zone_enum = ZONE_DMA;
} else if (start_pfn < normal_end_pfn) {
nr_pages = (start_pfn + size_pages > normal_end_pfn) ?
normal_end_pfn - start_pfn : size_pages;
zone_enum = ZONE_NORMAL;
} else {
nr_pages = size_pages;
zone_enum = ZONE_MOVABLE;
}
rc = __add_pages(nid, NODE_DATA(nid)->node_zones + zone_enum,
start_pfn, size_pages);
if (rc)
break;
start_pfn += nr_pages;
size_pages -= nr_pages;
}
if (rc)
vmem_remove_mapping(start, size);
return rc;
}
