void __init bootmem_init(void)
{
/* Reserve all memory below PHYS_OFFSET, as memory
* accounting doesn't work for pages below that address.
*
* If PHYS_OFFSET is zero reserve page at address 0:
* successfull allocations should never return NULL.
*/
if (PHYS_OFFSET)
memblock_reserve(0, PHYS_OFFSET);
else
memblock_reserve(0, 1);
early_init_fdt_scan_reserved_mem();
if (!memblock_phys_mem_size())
panic("No memory found!\n");
min_low_pfn = PFN_UP(memblock_start_of_DRAM());
min_low_pfn = max(min_low_pfn, PFN_UP(PHYS_OFFSET));
max_pfn = PFN_DOWN(memblock_end_of_DRAM());
max_low_pfn = min(max_pfn, MAX_LOW_PFN);
memblock_set_current_limit(PFN_PHYS(max_low_pfn));
dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
memblock_dump_all();
}
void __init walk_drmem_lmbs_early(unsigned long node,
void (*func)(struct drmem_lmb *, const __be32 **))
{
const __be32 *prop, *usm;
int len;
prop = of_get_flat_dt_prop(node, "ibm,lmb-size", &len);
if (!prop || len < dt_root_size_cells * sizeof(__be32))
return;
drmem_info->lmb_size = dt_mem_next_cell(dt_root_size_cells, &prop);
usm = of_get_flat_dt_prop(node, "linux,drconf-usable-memory", &len);
prop = of_get_flat_dt_prop(node, "ibm,dynamic-memory", &len);
if (prop) {
__walk_drmem_v1_lmbs(prop, usm, func);
} else {
prop = of_get_flat_dt_prop(node, "ibm,dynamic-memory-v2",
&len);
if (prop)
__walk_drmem_v2_lmbs(prop, usm, func);
}
memblock_dump_all();
}
/*
* 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 bootmem_init(void)
{
struct memblock_region *reg;
unsigned long bootmap_size;
unsigned long free_pfn, end_pfn, start_pfn;
init_mm.start_code = (unsigned long)_stext;
init_mm.end_code = (unsigned long)_etext;
init_mm.end_data = (unsigned long)_edata;
init_mm.brk = (unsigned long)_end;
memblock_init();
memblock_add(memory_start, memory_end);
if(((unsigned long)__pa(_end) < memory_start) || ((unsigned long)__pa(_end) > memory_end))
printk("BUG: your kernel is not located in the ddr sdram");
start_pfn = PFN_UP(memory_start);
free_pfn = PFN_UP(__pa((unsigned long)_end));
end_pfn = PFN_DOWN(memory_end);
//memblock_reserve(PFN_PHYS(start_pfn), PFN_PHYS(free_pfn - start_pfn));
memblock_reserve(__pa(_stext), _end - _stext);
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && initrd_end && initrd_start < initrd_end) {
memblock_reserve(initrd_start, initrd_end - initrd_start);
}
#endif
bootmap_size = init_bootmem(free_pfn, end_pfn);
memblock_reserve(PFN_PHYS(free_pfn), bootmap_size);
free_bootmem(PFN_PHYS(free_pfn), PFN_PHYS(end_pfn - free_pfn));
for_each_memblock(reserved, reg)
reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
memory_start += PAGE_OFFSET;
memory_end += PAGE_OFFSET;
memblock_analyze();
memblock_dump_all();
}
/*
* 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
}