void __init zone_sizes_init(void)
{
unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES];
unsigned long low, start_pfn;
int nid, i;
mem_prof_t *mp;
for_each_online_node(nid) {
mp = &mem_prof[nid];
for (i = 0 ; i < MAX_NR_ZONES ; i++) {
zones_size[i] = 0;
zholes_size[i] = 0;
}
start_pfn = START_PFN(nid);
low = MAX_LOW_PFN(nid);
zones_size[ZONE_DMA] = low - start_pfn;
zholes_size[ZONE_DMA] = mp->holes;
node_set_state(nid, N_NORMAL_MEMORY);
free_area_init_node(nid, zones_size, start_pfn, zholes_size);
}
/*
* For test
* Use all area of internal RAM.
* see __alloc_pages()
*/
NODE_DATA(1)->node_zones->watermark[WMARK_MIN] = 0;
NODE_DATA(1)->node_zones->watermark[WMARK_LOW] = 0;
NODE_DATA(1)->node_zones->watermark[WMARK_HIGH] = 0;
}
unsigned long __init zone_sizes_init(void)
{
unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES];
unsigned long low, start_pfn;
unsigned long holes = 0;
int nid, i;
mem_prof_t *mp;
for_each_online_node(nid) {
mp = &mem_prof[nid];
for (i = 0 ; i < MAX_NR_ZONES ; i++) {
zones_size[i] = 0;
zholes_size[i] = 0;
}
start_pfn = START_PFN(nid);
low = MAX_LOW_PFN(nid);
zones_size[ZONE_DMA] = low - start_pfn;
zholes_size[ZONE_DMA] = mp->holes;
holes += zholes_size[ZONE_DMA];
free_area_init_node(nid, NODE_DATA(nid), zones_size,
start_pfn, zholes_size);
}
/*
* For test
* Use all area of internal RAM.
* see __alloc_pages()
*/
NODE_DATA(1)->node_zones->pages_min = 0;
NODE_DATA(1)->node_zones->pages_low = 0;
NODE_DATA(1)->node_zones->pages_high = 0;
return holes;
}
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES];
int i, nid;
struct page *node_mem_map;
for (i = 1; i < MAX_NR_ZONES; i++)
zones_size[i] = 0;
for (nid = 0; nid < numnodes; nid++) {
unsigned long start_pfn;
unsigned long end_pfn;
start_pfn = plat_node_bdata[nid].node_boot_start >> PAGE_SHIFT;
end_pfn = plat_node_bdata[nid].node_low_pfn;
zones_size[ZONE_DMA] = end_pfn - start_pfn;
dbg("free_area_init node %d %lx %lx\n", nid,
zones_size[ZONE_DMA], start_pfn);
/*
* Give this empty node a dummy struct page to avoid
* us from trying to allocate a node local mem_map
* in free_area_init_node (which will fail).
*/
if (!node_data[nid].node_spanned_pages)
node_mem_map = alloc_bootmem(sizeof(struct page));
else
node_mem_map = NULL;
free_area_init_node(nid, NODE_DATA(nid), node_mem_map,
zones_size, start_pfn, NULL);
}
}
/*
* First memory setup routine called from setup_arch()
* 1. setup swapper's mm @init_mm
* 2. Count the pages we have and setup bootmem allocator
* 3. zone setup
*/
void __init setup_arch_memory(void)
{
unsigned long zones_size[MAX_NR_ZONES];
unsigned long end_mem = CONFIG_LINUX_LINK_BASE + arc_mem_sz;
init_mm.start_code = (unsigned long)_text;
init_mm.end_code = (unsigned long)_etext;
init_mm.end_data = (unsigned long)_edata;
init_mm.brk = (unsigned long)_end;
/*
* We do it here, so that memory is correctly instantiated
* even if "mem=xxx" cmline over-ride is given and/or
* DT has memory node. Each causes an update to @arc_mem_sz
* and we finally add memory one here
*/
memblock_add(CONFIG_LINUX_LINK_BASE, arc_mem_sz);
/*------------- externs in mm need setting up ---------------*/
/* first page of system - kernel .vector starts here */
min_low_pfn = ARCH_PFN_OFFSET;
/* Last usable page of low mem (no HIGHMEM yet for ARC port) */
max_low_pfn = max_pfn = PFN_DOWN(end_mem);
max_mapnr = max_low_pfn - min_low_pfn;
/*------------- reserve kernel image -----------------------*/
memblock_reserve(CONFIG_LINUX_LINK_BASE,
__pa(_end) - CONFIG_LINUX_LINK_BASE);
#ifdef CONFIG_BLK_DEV_INITRD
/*------------- reserve initrd image -----------------------*/
if (initrd_start)
memblock_reserve(__pa(initrd_start), initrd_end - initrd_start);
#endif
memblock_dump_all();
/*-------------- node setup --------------------------------*/
memset(zones_size, 0, sizeof(zones_size));
zones_size[ZONE_NORMAL] = max_mapnr;
/*
* We can't use the helper free_area_init(zones[]) because it uses
* PAGE_OFFSET to compute the @min_low_pfn which would be wrong
* when our kernel doesn't start at PAGE_OFFSET, i.e.
* PAGE_OFFSET != CONFIG_LINUX_LINK_BASE
*/
free_area_init_node(0, /* node-id */
zones_size, /* num pages per zone */
min_low_pfn, /* first pfn of node */
NULL); /* NO holes */
high_memory = (void *)end_mem;
}
void __init zones_init(void)
{
/* All pages are DMA-able, so we put them all in the DMA zone. */
unsigned long zones_size[MAX_NR_ZONES] = {
[ZONE_DMA] = max_low_pfn - ARCH_PFN_OFFSET,
#ifdef CONFIG_HIGHMEM
[ZONE_HIGHMEM] = max_pfn - max_low_pfn,
#endif
};
free_area_init_node(0, zones_size, ARCH_PFN_OFFSET, NULL);
}
static pg_data_t *hotadd_new_pgdat(int nid, u64 start)
{
struct pglist_data *pgdat;
unsigned long zones_size[MAX_NR_ZONES] = {0};
unsigned long zholes_size[MAX_NR_ZONES] = {0};
unsigned long start_pfn = start >> PAGE_SHIFT;
pgdat = arch_alloc_nodedata(nid);
if (!pgdat)
return NULL;
arch_refresh_nodedata(nid, pgdat);
/* we can use NODE_DATA(nid) from here */
/* init node's zones as empty zones, we don't have any present pages.*/
free_area_init_node(nid, pgdat, zones_size, start_pfn, zholes_size);
return pgdat;
}
/*
* First memory setup routine called from setup_arch()
* 1. setup swapper's mm @init_mm
* 2. Count the pages we have and setup bootmem allocator
* 3. zone setup
*/
void __init setup_arch_memory(void)
{
unsigned long zones_size[MAX_NR_ZONES];
unsigned long zones_holes[MAX_NR_ZONES];
init_mm.start_code = (unsigned long)_text;
init_mm.end_code = (unsigned long)_etext;
init_mm.end_data = (unsigned long)_edata;
init_mm.brk = (unsigned long)_end;
/* first page of system - kernel .vector starts here */
min_low_pfn = ARCH_PFN_OFFSET;
/* Last usable page of low mem */
max_low_pfn = max_pfn = PFN_DOWN(low_mem_start + low_mem_sz);
#ifdef CONFIG_HIGHMEM
min_high_pfn = PFN_DOWN(high_mem_start);
max_pfn = PFN_DOWN(high_mem_start + high_mem_sz);
#endif
max_mapnr = max_pfn - min_low_pfn;
/*------------- bootmem allocator setup -----------------------*/
/*
* seed the bootmem allocator after any DT memory node parsing or
* "mem=xxx" cmdline overrides have potentially updated @arc_mem_sz
*
* Only low mem is added, otherwise we have crashes when allocating
* mem_map[] itself. NO_BOOTMEM allocates mem_map[] at the end of
* avail memory, ending in highmem with a > 32-bit address. However
* it then tries to memset it with a truncaed 32-bit handle, causing
* the crash
*/
memblock_add(low_mem_start, low_mem_sz);
memblock_reserve(low_mem_start, __pa(_end) - low_mem_start);
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
memblock_reserve(__pa(initrd_start), initrd_end - initrd_start);
#endif
memblock_dump_all();
/*----------------- node/zones setup --------------------------*/
memset(zones_size, 0, sizeof(zones_size));
memset(zones_holes, 0, sizeof(zones_holes));
zones_size[ZONE_NORMAL] = max_low_pfn - min_low_pfn;
zones_holes[ZONE_NORMAL] = 0;
#ifdef CONFIG_HIGHMEM
zones_size[ZONE_HIGHMEM] = max_pfn - max_low_pfn;
/* This handles the peripheral address space hole */
zones_holes[ZONE_HIGHMEM] = min_high_pfn - max_low_pfn;
#endif
/*
* We can't use the helper free_area_init(zones[]) because it uses
* PAGE_OFFSET to compute the @min_low_pfn which would be wrong
* when our kernel doesn't start at PAGE_OFFSET, i.e.
* PAGE_OFFSET != CONFIG_LINUX_LINK_BASE
*/
free_area_init_node(0, /* node-id */
zones_size, /* num pages per zone */
min_low_pfn, /* first pfn of node */
zones_holes); /* holes */
#ifdef CONFIG_HIGHMEM
high_memory = (void *)(min_high_pfn << PAGE_SHIFT);
kmap_init();
#endif
}
/*
* First memory setup routine called from setup_arch()
* 1. setup swapper's mm @init_mm
* 2. Count the pages we have and setup bootmem allocator
* 3. zone setup
*/
void __init setup_arch_memory(void)
{
unsigned long zones_size[MAX_NR_ZONES];
unsigned long zones_holes[MAX_NR_ZONES];
init_mm.start_code = (unsigned long)_text;
init_mm.end_code = (unsigned long)_etext;
init_mm.end_data = (unsigned long)_edata;
init_mm.brk = (unsigned long)_end;
/* first page of system - kernel .vector starts here */
min_low_pfn = ARCH_PFN_OFFSET;
/* Last usable page of low mem */
max_low_pfn = max_pfn = PFN_DOWN(low_mem_start + low_mem_sz);
#ifdef CONFIG_FLATMEM
/* pfn_valid() uses this */
max_mapnr = max_low_pfn - min_low_pfn;
#endif
/*------------- bootmem allocator setup -----------------------*/
/*
* seed the bootmem allocator after any DT memory node parsing or
* "mem=xxx" cmdline overrides have potentially updated @arc_mem_sz
*
* Only low mem is added, otherwise we have crashes when allocating
* mem_map[] itself. NO_BOOTMEM allocates mem_map[] at the end of
* avail memory, ending in highmem with a > 32-bit address. However
* it then tries to memset it with a truncaed 32-bit handle, causing
* the crash
*/
memblock_add_node(low_mem_start, low_mem_sz, 0);
memblock_reserve(CONFIG_LINUX_LINK_BASE,
__pa(_end) - CONFIG_LINUX_LINK_BASE);
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
memblock_reserve(__pa(initrd_start), initrd_end - initrd_start);
#endif
early_init_fdt_reserve_self();
early_init_fdt_scan_reserved_mem();
memblock_dump_all();
/*----------------- node/zones setup --------------------------*/
memset(zones_size, 0, sizeof(zones_size));
memset(zones_holes, 0, sizeof(zones_holes));
zones_size[ZONE_NORMAL] = max_low_pfn - min_low_pfn;
zones_holes[ZONE_NORMAL] = 0;
/*
* We can't use the helper free_area_init(zones[]) because it uses
* PAGE_OFFSET to compute the @min_low_pfn which would be wrong
* when our kernel doesn't start at PAGE_OFFSET, i.e.
* PAGE_OFFSET != CONFIG_LINUX_RAM_BASE
*/
free_area_init_node(0, /* node-id */
zones_size, /* num pages per zone */
min_low_pfn, /* first pfn of node */
zones_holes); /* holes */
#ifdef CONFIG_HIGHMEM
/*
* Populate a new node with highmem
*
* On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based)
* than addresses in normal ala low memory (0x8000_0000 based).
* Even with PAE, the huge peripheral space hole would waste a lot of
* mem with single mem_map[]. This warrants a mem_map per region design.
* Thus HIGHMEM on ARC is imlemented with DISCONTIGMEM.
*
* DISCONTIGMEM in turns requires multiple nodes. node 0 above is
* populated with normal memory zone while node 1 only has highmem
*/
node_set_online(1);
min_high_pfn = PFN_DOWN(high_mem_start);
max_high_pfn = PFN_DOWN(high_mem_start + high_mem_sz);
zones_size[ZONE_NORMAL] = 0;
zones_holes[ZONE_NORMAL] = 0;
zones_size[ZONE_HIGHMEM] = max_high_pfn - min_high_pfn;
zones_holes[ZONE_HIGHMEM] = 0;
free_area_init_node(1, /* node-id */
zones_size, /* num pages per zone */
min_high_pfn, /* first pfn of node */
zones_holes); /* holes */
high_memory = (void *)(min_high_pfn << PAGE_SHIFT);
kmap_init();
#endif
}
