![Santosh Shilimkar](/assets/img/avatar_default.png)
Current code is using PHYS_OFFSET to calculate the arm_dma_limit which will lead to wrong calculations in cases where PHYS_OFFSET is updated runtime. So fix the code by using __pv_phys_offset instead of PHYS_OFFSET. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
714 lines
18 KiB
C
714 lines
18 KiB
C
/*
|
|
* linux/arch/arm/mm/init.c
|
|
*
|
|
* Copyright (C) 1995-2005 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/init.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/export.h>
|
|
#include <linux/nodemask.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/dma-contiguous.h>
|
|
#include <linux/sizes.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
#include <asm/memblock.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/tlb.h>
|
|
#include <asm/fixmap.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
|
|
#include "mm.h"
|
|
|
|
static phys_addr_t phys_initrd_start __initdata = 0;
|
|
static unsigned long phys_initrd_size __initdata = 0;
|
|
|
|
static int __init early_initrd(char *p)
|
|
{
|
|
phys_addr_t start;
|
|
unsigned long size;
|
|
char *endp;
|
|
|
|
start = memparse(p, &endp);
|
|
if (*endp == ',') {
|
|
size = memparse(endp + 1, NULL);
|
|
|
|
phys_initrd_start = start;
|
|
phys_initrd_size = size;
|
|
}
|
|
return 0;
|
|
}
|
|
early_param("initrd", early_initrd);
|
|
|
|
static int __init parse_tag_initrd(const struct tag *tag)
|
|
{
|
|
printk(KERN_WARNING "ATAG_INITRD is deprecated; "
|
|
"please update your bootloader.\n");
|
|
phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
|
|
phys_initrd_size = tag->u.initrd.size;
|
|
return 0;
|
|
}
|
|
|
|
__tagtable(ATAG_INITRD, parse_tag_initrd);
|
|
|
|
static int __init parse_tag_initrd2(const struct tag *tag)
|
|
{
|
|
phys_initrd_start = tag->u.initrd.start;
|
|
phys_initrd_size = tag->u.initrd.size;
|
|
return 0;
|
|
}
|
|
|
|
__tagtable(ATAG_INITRD2, parse_tag_initrd2);
|
|
|
|
/*
|
|
* This keeps memory configuration data used by a couple memory
|
|
* initialization functions, as well as show_mem() for the skipping
|
|
* of holes in the memory map. It is populated by arm_add_memory().
|
|
*/
|
|
struct meminfo meminfo;
|
|
|
|
void show_mem(unsigned int filter)
|
|
{
|
|
int free = 0, total = 0, reserved = 0;
|
|
int shared = 0, cached = 0, slab = 0, i;
|
|
struct meminfo * mi = &meminfo;
|
|
|
|
printk("Mem-info:\n");
|
|
show_free_areas(filter);
|
|
|
|
if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
|
|
return;
|
|
|
|
for_each_bank (i, mi) {
|
|
struct membank *bank = &mi->bank[i];
|
|
unsigned int pfn1, pfn2;
|
|
struct page *page, *end;
|
|
|
|
pfn1 = bank_pfn_start(bank);
|
|
pfn2 = bank_pfn_end(bank);
|
|
|
|
page = pfn_to_page(pfn1);
|
|
end = pfn_to_page(pfn2 - 1) + 1;
|
|
|
|
do {
|
|
total++;
|
|
if (PageReserved(page))
|
|
reserved++;
|
|
else if (PageSwapCache(page))
|
|
cached++;
|
|
else if (PageSlab(page))
|
|
slab++;
|
|
else if (!page_count(page))
|
|
free++;
|
|
else
|
|
shared += page_count(page) - 1;
|
|
page++;
|
|
} while (page < end);
|
|
}
|
|
|
|
printk("%d pages of RAM\n", total);
|
|
printk("%d free pages\n", free);
|
|
printk("%d reserved pages\n", reserved);
|
|
printk("%d slab pages\n", slab);
|
|
printk("%d pages shared\n", shared);
|
|
printk("%d pages swap cached\n", cached);
|
|
}
|
|
|
|
static void __init find_limits(unsigned long *min, unsigned long *max_low,
|
|
unsigned long *max_high)
|
|
{
|
|
struct meminfo *mi = &meminfo;
|
|
int i;
|
|
|
|
/* This assumes the meminfo array is properly sorted */
|
|
*min = bank_pfn_start(&mi->bank[0]);
|
|
for_each_bank (i, mi)
|
|
if (mi->bank[i].highmem)
|
|
break;
|
|
*max_low = bank_pfn_end(&mi->bank[i - 1]);
|
|
*max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]);
|
|
}
|
|
|
|
static void __init arm_bootmem_init(unsigned long start_pfn,
|
|
unsigned long end_pfn)
|
|
{
|
|
struct memblock_region *reg;
|
|
unsigned int boot_pages;
|
|
phys_addr_t bitmap;
|
|
pg_data_t *pgdat;
|
|
|
|
/*
|
|
* Allocate the bootmem bitmap page. This must be in a region
|
|
* of memory which has already been mapped.
|
|
*/
|
|
boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
|
|
bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES,
|
|
__pfn_to_phys(end_pfn));
|
|
|
|
/*
|
|
* Initialise the bootmem allocator, handing the
|
|
* memory banks over to bootmem.
|
|
*/
|
|
node_set_online(0);
|
|
pgdat = NODE_DATA(0);
|
|
init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn);
|
|
|
|
/* Free the lowmem regions from memblock into bootmem. */
|
|
for_each_memblock(memory, reg) {
|
|
unsigned long start = memblock_region_memory_base_pfn(reg);
|
|
unsigned long end = memblock_region_memory_end_pfn(reg);
|
|
|
|
if (end >= end_pfn)
|
|
end = end_pfn;
|
|
if (start >= end)
|
|
break;
|
|
|
|
free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT);
|
|
}
|
|
|
|
/* Reserve the lowmem memblock reserved regions in bootmem. */
|
|
for_each_memblock(reserved, reg) {
|
|
unsigned long start = memblock_region_reserved_base_pfn(reg);
|
|
unsigned long end = memblock_region_reserved_end_pfn(reg);
|
|
|
|
if (end >= end_pfn)
|
|
end = end_pfn;
|
|
if (start >= end)
|
|
break;
|
|
|
|
reserve_bootmem(__pfn_to_phys(start),
|
|
(end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_ZONE_DMA
|
|
|
|
phys_addr_t arm_dma_zone_size __read_mostly;
|
|
EXPORT_SYMBOL(arm_dma_zone_size);
|
|
|
|
/*
|
|
* The DMA mask corresponding to the maximum bus address allocatable
|
|
* using GFP_DMA. The default here places no restriction on DMA
|
|
* allocations. This must be the smallest DMA mask in the system,
|
|
* so a successful GFP_DMA allocation will always satisfy this.
|
|
*/
|
|
phys_addr_t arm_dma_limit;
|
|
unsigned long arm_dma_pfn_limit;
|
|
|
|
static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole,
|
|
unsigned long dma_size)
|
|
{
|
|
if (size[0] <= dma_size)
|
|
return;
|
|
|
|
size[ZONE_NORMAL] = size[0] - dma_size;
|
|
size[ZONE_DMA] = dma_size;
|
|
hole[ZONE_NORMAL] = hole[0];
|
|
hole[ZONE_DMA] = 0;
|
|
}
|
|
#endif
|
|
|
|
void __init setup_dma_zone(const struct machine_desc *mdesc)
|
|
{
|
|
#ifdef CONFIG_ZONE_DMA
|
|
if (mdesc->dma_zone_size) {
|
|
arm_dma_zone_size = mdesc->dma_zone_size;
|
|
arm_dma_limit = __pv_phys_offset + arm_dma_zone_size - 1;
|
|
} else
|
|
arm_dma_limit = 0xffffffff;
|
|
arm_dma_pfn_limit = arm_dma_limit >> PAGE_SHIFT;
|
|
#endif
|
|
}
|
|
|
|
static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
|
|
unsigned long max_high)
|
|
{
|
|
unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
|
|
struct memblock_region *reg;
|
|
|
|
/*
|
|
* initialise the zones.
|
|
*/
|
|
memset(zone_size, 0, sizeof(zone_size));
|
|
|
|
/*
|
|
* The memory size has already been determined. If we need
|
|
* to do anything fancy with the allocation of this memory
|
|
* to the zones, now is the time to do it.
|
|
*/
|
|
zone_size[0] = max_low - min;
|
|
#ifdef CONFIG_HIGHMEM
|
|
zone_size[ZONE_HIGHMEM] = max_high - max_low;
|
|
#endif
|
|
|
|
/*
|
|
* Calculate the size of the holes.
|
|
* holes = node_size - sum(bank_sizes)
|
|
*/
|
|
memcpy(zhole_size, zone_size, sizeof(zhole_size));
|
|
for_each_memblock(memory, reg) {
|
|
unsigned long start = memblock_region_memory_base_pfn(reg);
|
|
unsigned long end = memblock_region_memory_end_pfn(reg);
|
|
|
|
if (start < max_low) {
|
|
unsigned long low_end = min(end, max_low);
|
|
zhole_size[0] -= low_end - start;
|
|
}
|
|
#ifdef CONFIG_HIGHMEM
|
|
if (end > max_low) {
|
|
unsigned long high_start = max(start, max_low);
|
|
zhole_size[ZONE_HIGHMEM] -= end - high_start;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_ZONE_DMA
|
|
/*
|
|
* Adjust the sizes according to any special requirements for
|
|
* this machine type.
|
|
*/
|
|
if (arm_dma_zone_size)
|
|
arm_adjust_dma_zone(zone_size, zhole_size,
|
|
arm_dma_zone_size >> PAGE_SHIFT);
|
|
#endif
|
|
|
|
free_area_init_node(0, zone_size, min, zhole_size);
|
|
}
|
|
|
|
#ifdef CONFIG_HAVE_ARCH_PFN_VALID
|
|
int pfn_valid(unsigned long pfn)
|
|
{
|
|
return memblock_is_memory(__pfn_to_phys(pfn));
|
|
}
|
|
EXPORT_SYMBOL(pfn_valid);
|
|
#endif
|
|
|
|
#ifndef CONFIG_SPARSEMEM
|
|
static void __init arm_memory_present(void)
|
|
{
|
|
}
|
|
#else
|
|
static void __init arm_memory_present(void)
|
|
{
|
|
struct memblock_region *reg;
|
|
|
|
for_each_memblock(memory, reg)
|
|
memory_present(0, memblock_region_memory_base_pfn(reg),
|
|
memblock_region_memory_end_pfn(reg));
|
|
}
|
|
#endif
|
|
|
|
static bool arm_memblock_steal_permitted = true;
|
|
|
|
phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
|
|
{
|
|
phys_addr_t phys;
|
|
|
|
BUG_ON(!arm_memblock_steal_permitted);
|
|
|
|
phys = memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ANYWHERE);
|
|
memblock_free(phys, size);
|
|
memblock_remove(phys, size);
|
|
|
|
return phys;
|
|
}
|
|
|
|
void __init arm_memblock_init(struct meminfo *mi,
|
|
const struct machine_desc *mdesc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < mi->nr_banks; i++)
|
|
memblock_add(mi->bank[i].start, mi->bank[i].size);
|
|
|
|
/* Register the kernel text, kernel data and initrd with memblock. */
|
|
#ifdef CONFIG_XIP_KERNEL
|
|
memblock_reserve(__pa(_sdata), _end - _sdata);
|
|
#else
|
|
memblock_reserve(__pa(_stext), _end - _stext);
|
|
#endif
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
/* FDT scan will populate initrd_start */
|
|
if (initrd_start) {
|
|
phys_initrd_start = __virt_to_phys(initrd_start);
|
|
phys_initrd_size = initrd_end - initrd_start;
|
|
}
|
|
if (phys_initrd_size &&
|
|
!memblock_is_region_memory(phys_initrd_start, phys_initrd_size)) {
|
|
pr_err("INITRD: 0x%08llx+0x%08lx is not a memory region - disabling initrd\n",
|
|
(u64)phys_initrd_start, phys_initrd_size);
|
|
phys_initrd_start = phys_initrd_size = 0;
|
|
}
|
|
if (phys_initrd_size &&
|
|
memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) {
|
|
pr_err("INITRD: 0x%08llx+0x%08lx overlaps in-use memory region - disabling initrd\n",
|
|
(u64)phys_initrd_start, phys_initrd_size);
|
|
phys_initrd_start = phys_initrd_size = 0;
|
|
}
|
|
if (phys_initrd_size) {
|
|
memblock_reserve(phys_initrd_start, phys_initrd_size);
|
|
|
|
/* Now convert initrd to virtual addresses */
|
|
initrd_start = __phys_to_virt(phys_initrd_start);
|
|
initrd_end = initrd_start + phys_initrd_size;
|
|
}
|
|
#endif
|
|
|
|
arm_mm_memblock_reserve();
|
|
arm_dt_memblock_reserve();
|
|
|
|
/* reserve any platform specific memblock areas */
|
|
if (mdesc->reserve)
|
|
mdesc->reserve();
|
|
|
|
/*
|
|
* reserve memory for DMA contigouos allocations,
|
|
* must come from DMA area inside low memory
|
|
*/
|
|
dma_contiguous_reserve(min(arm_dma_limit, arm_lowmem_limit));
|
|
|
|
arm_memblock_steal_permitted = false;
|
|
memblock_allow_resize();
|
|
memblock_dump_all();
|
|
}
|
|
|
|
void __init bootmem_init(void)
|
|
{
|
|
unsigned long min, max_low, max_high;
|
|
|
|
max_low = max_high = 0;
|
|
|
|
find_limits(&min, &max_low, &max_high);
|
|
|
|
arm_bootmem_init(min, max_low);
|
|
|
|
/*
|
|
* Sparsemem tries to allocate bootmem in memory_present(),
|
|
* so must be done after the fixed reservations
|
|
*/
|
|
arm_memory_present();
|
|
|
|
/*
|
|
* sparse_init() needs the bootmem allocator up and running.
|
|
*/
|
|
sparse_init();
|
|
|
|
/*
|
|
* Now free the memory - free_area_init_node needs
|
|
* the sparse mem_map arrays initialized by sparse_init()
|
|
* for memmap_init_zone(), otherwise all PFNs are invalid.
|
|
*/
|
|
arm_bootmem_free(min, max_low, max_high);
|
|
|
|
/*
|
|
* This doesn't seem to be used by the Linux memory manager any
|
|
* more, but is used by ll_rw_block. If we can get rid of it, we
|
|
* also get rid of some of the stuff above as well.
|
|
*/
|
|
min_low_pfn = min;
|
|
max_low_pfn = max_low;
|
|
max_pfn = max_high;
|
|
}
|
|
|
|
/*
|
|
* Poison init memory with an undefined instruction (ARM) or a branch to an
|
|
* undefined instruction (Thumb).
|
|
*/
|
|
static inline void poison_init_mem(void *s, size_t count)
|
|
{
|
|
u32 *p = (u32 *)s;
|
|
for (; count != 0; count -= 4)
|
|
*p++ = 0xe7fddef0;
|
|
}
|
|
|
|
static inline void
|
|
free_memmap(unsigned long start_pfn, unsigned long end_pfn)
|
|
{
|
|
struct page *start_pg, *end_pg;
|
|
phys_addr_t pg, pgend;
|
|
|
|
/*
|
|
* Convert start_pfn/end_pfn to a struct page pointer.
|
|
*/
|
|
start_pg = pfn_to_page(start_pfn - 1) + 1;
|
|
end_pg = pfn_to_page(end_pfn - 1) + 1;
|
|
|
|
/*
|
|
* Convert to physical addresses, and
|
|
* round start upwards and end downwards.
|
|
*/
|
|
pg = PAGE_ALIGN(__pa(start_pg));
|
|
pgend = __pa(end_pg) & PAGE_MASK;
|
|
|
|
/*
|
|
* If there are free pages between these,
|
|
* free the section of the memmap array.
|
|
*/
|
|
if (pg < pgend)
|
|
free_bootmem(pg, pgend - pg);
|
|
}
|
|
|
|
/*
|
|
* The mem_map array can get very big. Free the unused area of the memory map.
|
|
*/
|
|
static void __init free_unused_memmap(struct meminfo *mi)
|
|
{
|
|
unsigned long bank_start, prev_bank_end = 0;
|
|
unsigned int i;
|
|
|
|
/*
|
|
* This relies on each bank being in address order.
|
|
* The banks are sorted previously in bootmem_init().
|
|
*/
|
|
for_each_bank(i, mi) {
|
|
struct membank *bank = &mi->bank[i];
|
|
|
|
bank_start = bank_pfn_start(bank);
|
|
|
|
#ifdef CONFIG_SPARSEMEM
|
|
/*
|
|
* Take care not to free memmap entries that don't exist
|
|
* due to SPARSEMEM sections which aren't present.
|
|
*/
|
|
bank_start = min(bank_start,
|
|
ALIGN(prev_bank_end, PAGES_PER_SECTION));
|
|
#else
|
|
/*
|
|
* Align down here since the VM subsystem insists that the
|
|
* memmap entries are valid from the bank start aligned to
|
|
* MAX_ORDER_NR_PAGES.
|
|
*/
|
|
bank_start = round_down(bank_start, MAX_ORDER_NR_PAGES);
|
|
#endif
|
|
/*
|
|
* If we had a previous bank, and there is a space
|
|
* between the current bank and the previous, free it.
|
|
*/
|
|
if (prev_bank_end && prev_bank_end < bank_start)
|
|
free_memmap(prev_bank_end, bank_start);
|
|
|
|
/*
|
|
* Align up here since the VM subsystem insists that the
|
|
* memmap entries are valid from the bank end aligned to
|
|
* MAX_ORDER_NR_PAGES.
|
|
*/
|
|
prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
|
|
}
|
|
|
|
#ifdef CONFIG_SPARSEMEM
|
|
if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
|
|
free_memmap(prev_bank_end,
|
|
ALIGN(prev_bank_end, PAGES_PER_SECTION));
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
static inline void free_area_high(unsigned long pfn, unsigned long end)
|
|
{
|
|
for (; pfn < end; pfn++)
|
|
free_highmem_page(pfn_to_page(pfn));
|
|
}
|
|
#endif
|
|
|
|
static void __init free_highpages(void)
|
|
{
|
|
#ifdef CONFIG_HIGHMEM
|
|
unsigned long max_low = max_low_pfn;
|
|
struct memblock_region *mem, *res;
|
|
|
|
/* set highmem page free */
|
|
for_each_memblock(memory, mem) {
|
|
unsigned long start = memblock_region_memory_base_pfn(mem);
|
|
unsigned long end = memblock_region_memory_end_pfn(mem);
|
|
|
|
/* Ignore complete lowmem entries */
|
|
if (end <= max_low)
|
|
continue;
|
|
|
|
/* Truncate partial highmem entries */
|
|
if (start < max_low)
|
|
start = max_low;
|
|
|
|
/* Find and exclude any reserved regions */
|
|
for_each_memblock(reserved, res) {
|
|
unsigned long res_start, res_end;
|
|
|
|
res_start = memblock_region_reserved_base_pfn(res);
|
|
res_end = memblock_region_reserved_end_pfn(res);
|
|
|
|
if (res_end < start)
|
|
continue;
|
|
if (res_start < start)
|
|
res_start = start;
|
|
if (res_start > end)
|
|
res_start = end;
|
|
if (res_end > end)
|
|
res_end = end;
|
|
if (res_start != start)
|
|
free_area_high(start, res_start);
|
|
start = res_end;
|
|
if (start == end)
|
|
break;
|
|
}
|
|
|
|
/* And now free anything which remains */
|
|
if (start < end)
|
|
free_area_high(start, end);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* mem_init() marks the free areas in the mem_map and tells us how much
|
|
* memory is free. This is done after various parts of the system have
|
|
* claimed their memory after the kernel image.
|
|
*/
|
|
void __init mem_init(void)
|
|
{
|
|
#ifdef CONFIG_HAVE_TCM
|
|
/* These pointers are filled in on TCM detection */
|
|
extern u32 dtcm_end;
|
|
extern u32 itcm_end;
|
|
#endif
|
|
|
|
max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
|
|
|
|
/* this will put all unused low memory onto the freelists */
|
|
free_unused_memmap(&meminfo);
|
|
free_all_bootmem();
|
|
|
|
#ifdef CONFIG_SA1111
|
|
/* now that our DMA memory is actually so designated, we can free it */
|
|
free_reserved_area(__va(PHYS_OFFSET), swapper_pg_dir, -1, NULL);
|
|
#endif
|
|
|
|
free_highpages();
|
|
|
|
mem_init_print_info(NULL);
|
|
|
|
#define MLK(b, t) b, t, ((t) - (b)) >> 10
|
|
#define MLM(b, t) b, t, ((t) - (b)) >> 20
|
|
#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
|
|
|
|
printk(KERN_NOTICE "Virtual kernel memory layout:\n"
|
|
" vector : 0x%08lx - 0x%08lx (%4ld kB)\n"
|
|
#ifdef CONFIG_HAVE_TCM
|
|
" DTCM : 0x%08lx - 0x%08lx (%4ld kB)\n"
|
|
" ITCM : 0x%08lx - 0x%08lx (%4ld kB)\n"
|
|
#endif
|
|
" fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
|
|
" vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
" lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
#ifdef CONFIG_HIGHMEM
|
|
" pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
#endif
|
|
#ifdef CONFIG_MODULES
|
|
" modules : 0x%08lx - 0x%08lx (%4ld MB)\n"
|
|
#endif
|
|
" .text : 0x%p" " - 0x%p" " (%4d kB)\n"
|
|
" .init : 0x%p" " - 0x%p" " (%4d kB)\n"
|
|
" .data : 0x%p" " - 0x%p" " (%4d kB)\n"
|
|
" .bss : 0x%p" " - 0x%p" " (%4d kB)\n",
|
|
|
|
MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
|
|
(PAGE_SIZE)),
|
|
#ifdef CONFIG_HAVE_TCM
|
|
MLK(DTCM_OFFSET, (unsigned long) dtcm_end),
|
|
MLK(ITCM_OFFSET, (unsigned long) itcm_end),
|
|
#endif
|
|
MLK(FIXADDR_START, FIXADDR_TOP),
|
|
MLM(VMALLOC_START, VMALLOC_END),
|
|
MLM(PAGE_OFFSET, (unsigned long)high_memory),
|
|
#ifdef CONFIG_HIGHMEM
|
|
MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
|
|
(PAGE_SIZE)),
|
|
#endif
|
|
#ifdef CONFIG_MODULES
|
|
MLM(MODULES_VADDR, MODULES_END),
|
|
#endif
|
|
|
|
MLK_ROUNDUP(_text, _etext),
|
|
MLK_ROUNDUP(__init_begin, __init_end),
|
|
MLK_ROUNDUP(_sdata, _edata),
|
|
MLK_ROUNDUP(__bss_start, __bss_stop));
|
|
|
|
#undef MLK
|
|
#undef MLM
|
|
#undef MLK_ROUNDUP
|
|
|
|
/*
|
|
* Check boundaries twice: Some fundamental inconsistencies can
|
|
* be detected at build time already.
|
|
*/
|
|
#ifdef CONFIG_MMU
|
|
BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR);
|
|
BUG_ON(TASK_SIZE > MODULES_VADDR);
|
|
#endif
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
|
|
BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
|
|
#endif
|
|
|
|
if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {
|
|
extern int sysctl_overcommit_memory;
|
|
/*
|
|
* On a machine this small we won't get
|
|
* anywhere without overcommit, so turn
|
|
* it on by default.
|
|
*/
|
|
sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
|
|
}
|
|
}
|
|
|
|
void free_initmem(void)
|
|
{
|
|
#ifdef CONFIG_HAVE_TCM
|
|
extern char __tcm_start, __tcm_end;
|
|
|
|
poison_init_mem(&__tcm_start, &__tcm_end - &__tcm_start);
|
|
free_reserved_area(&__tcm_start, &__tcm_end, -1, "TCM link");
|
|
#endif
|
|
|
|
poison_init_mem(__init_begin, __init_end - __init_begin);
|
|
if (!machine_is_integrator() && !machine_is_cintegrator())
|
|
free_initmem_default(-1);
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
|
|
static int keep_initrd;
|
|
|
|
void free_initrd_mem(unsigned long start, unsigned long end)
|
|
{
|
|
if (!keep_initrd) {
|
|
poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
|
|
free_reserved_area((void *)start, (void *)end, -1, "initrd");
|
|
}
|
|
}
|
|
|
|
static int __init keepinitrd_setup(char *__unused)
|
|
{
|
|
keep_initrd = 1;
|
|
return 1;
|
|
}
|
|
|
|
__setup("keepinitrd", keepinitrd_setup);
|
|
#endif
|