mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 22:53:55 +08:00
b95f1b31b7
The files changed within are only using the EXPORT_SYMBOL macro variants. They are not using core modular infrastructure and hence don't need module.h but only the export.h header. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
405 lines
10 KiB
C
405 lines
10 KiB
C
/*
|
|
* bootmem - A boot-time physical memory allocator and configurator
|
|
*
|
|
* Copyright (C) 1999 Ingo Molnar
|
|
* 1999 Kanoj Sarcar, SGI
|
|
* 2008 Johannes Weiner
|
|
*
|
|
* Access to this subsystem has to be serialized externally (which is true
|
|
* for the boot process anyway).
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/pfn.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/export.h>
|
|
#include <linux/kmemleak.h>
|
|
#include <linux/range.h>
|
|
#include <linux/memblock.h>
|
|
|
|
#include <asm/bug.h>
|
|
#include <asm/io.h>
|
|
#include <asm/processor.h>
|
|
|
|
#include "internal.h"
|
|
|
|
#ifndef CONFIG_NEED_MULTIPLE_NODES
|
|
struct pglist_data __refdata contig_page_data;
|
|
EXPORT_SYMBOL(contig_page_data);
|
|
#endif
|
|
|
|
unsigned long max_low_pfn;
|
|
unsigned long min_low_pfn;
|
|
unsigned long max_pfn;
|
|
|
|
static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
|
|
u64 goal, u64 limit)
|
|
{
|
|
void *ptr;
|
|
u64 addr;
|
|
|
|
if (limit > memblock.current_limit)
|
|
limit = memblock.current_limit;
|
|
|
|
addr = find_memory_core_early(nid, size, align, goal, limit);
|
|
|
|
if (addr == MEMBLOCK_ERROR)
|
|
return NULL;
|
|
|
|
ptr = phys_to_virt(addr);
|
|
memset(ptr, 0, size);
|
|
memblock_x86_reserve_range(addr, addr + size, "BOOTMEM");
|
|
/*
|
|
* The min_count is set to 0 so that bootmem allocated blocks
|
|
* are never reported as leaks.
|
|
*/
|
|
kmemleak_alloc(ptr, size, 0, 0);
|
|
return ptr;
|
|
}
|
|
|
|
/*
|
|
* free_bootmem_late - free bootmem pages directly to page allocator
|
|
* @addr: starting address of the range
|
|
* @size: size of the range in bytes
|
|
*
|
|
* This is only useful when the bootmem allocator has already been torn
|
|
* down, but we are still initializing the system. Pages are given directly
|
|
* to the page allocator, no bootmem metadata is updated because it is gone.
|
|
*/
|
|
void __init free_bootmem_late(unsigned long addr, unsigned long size)
|
|
{
|
|
unsigned long cursor, end;
|
|
|
|
kmemleak_free_part(__va(addr), size);
|
|
|
|
cursor = PFN_UP(addr);
|
|
end = PFN_DOWN(addr + size);
|
|
|
|
for (; cursor < end; cursor++) {
|
|
__free_pages_bootmem(pfn_to_page(cursor), 0);
|
|
totalram_pages++;
|
|
}
|
|
}
|
|
|
|
static void __init __free_pages_memory(unsigned long start, unsigned long end)
|
|
{
|
|
int i;
|
|
unsigned long start_aligned, end_aligned;
|
|
int order = ilog2(BITS_PER_LONG);
|
|
|
|
start_aligned = (start + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1);
|
|
end_aligned = end & ~(BITS_PER_LONG - 1);
|
|
|
|
if (end_aligned <= start_aligned) {
|
|
for (i = start; i < end; i++)
|
|
__free_pages_bootmem(pfn_to_page(i), 0);
|
|
|
|
return;
|
|
}
|
|
|
|
for (i = start; i < start_aligned; i++)
|
|
__free_pages_bootmem(pfn_to_page(i), 0);
|
|
|
|
for (i = start_aligned; i < end_aligned; i += BITS_PER_LONG)
|
|
__free_pages_bootmem(pfn_to_page(i), order);
|
|
|
|
for (i = end_aligned; i < end; i++)
|
|
__free_pages_bootmem(pfn_to_page(i), 0);
|
|
}
|
|
|
|
unsigned long __init free_all_memory_core_early(int nodeid)
|
|
{
|
|
int i;
|
|
u64 start, end;
|
|
unsigned long count = 0;
|
|
struct range *range = NULL;
|
|
int nr_range;
|
|
|
|
nr_range = get_free_all_memory_range(&range, nodeid);
|
|
|
|
for (i = 0; i < nr_range; i++) {
|
|
start = range[i].start;
|
|
end = range[i].end;
|
|
count += end - start;
|
|
__free_pages_memory(start, end);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* free_all_bootmem_node - release a node's free pages to the buddy allocator
|
|
* @pgdat: node to be released
|
|
*
|
|
* Returns the number of pages actually released.
|
|
*/
|
|
unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
|
|
{
|
|
register_page_bootmem_info_node(pgdat);
|
|
|
|
/* free_all_memory_core_early(MAX_NUMNODES) will be called later */
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* free_all_bootmem - release free pages to the buddy allocator
|
|
*
|
|
* Returns the number of pages actually released.
|
|
*/
|
|
unsigned long __init free_all_bootmem(void)
|
|
{
|
|
/*
|
|
* We need to use MAX_NUMNODES instead of NODE_DATA(0)->node_id
|
|
* because in some case like Node0 doesn't have RAM installed
|
|
* low ram will be on Node1
|
|
* Use MAX_NUMNODES will make sure all ranges in early_node_map[]
|
|
* will be used instead of only Node0 related
|
|
*/
|
|
return free_all_memory_core_early(MAX_NUMNODES);
|
|
}
|
|
|
|
/**
|
|
* free_bootmem_node - mark a page range as usable
|
|
* @pgdat: node the range resides on
|
|
* @physaddr: starting address of the range
|
|
* @size: size of the range in bytes
|
|
*
|
|
* Partial pages will be considered reserved and left as they are.
|
|
*
|
|
* The range must reside completely on the specified node.
|
|
*/
|
|
void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
|
|
unsigned long size)
|
|
{
|
|
kmemleak_free_part(__va(physaddr), size);
|
|
memblock_x86_free_range(physaddr, physaddr + size);
|
|
}
|
|
|
|
/**
|
|
* free_bootmem - mark a page range as usable
|
|
* @addr: starting address of the range
|
|
* @size: size of the range in bytes
|
|
*
|
|
* Partial pages will be considered reserved and left as they are.
|
|
*
|
|
* The range must be contiguous but may span node boundaries.
|
|
*/
|
|
void __init free_bootmem(unsigned long addr, unsigned long size)
|
|
{
|
|
kmemleak_free_part(__va(addr), size);
|
|
memblock_x86_free_range(addr, addr + size);
|
|
}
|
|
|
|
static void * __init ___alloc_bootmem_nopanic(unsigned long size,
|
|
unsigned long align,
|
|
unsigned long goal,
|
|
unsigned long limit)
|
|
{
|
|
void *ptr;
|
|
|
|
if (WARN_ON_ONCE(slab_is_available()))
|
|
return kzalloc(size, GFP_NOWAIT);
|
|
|
|
restart:
|
|
|
|
ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align, goal, limit);
|
|
|
|
if (ptr)
|
|
return ptr;
|
|
|
|
if (goal != 0) {
|
|
goal = 0;
|
|
goto restart;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* __alloc_bootmem_nopanic - allocate boot memory without panicking
|
|
* @size: size of the request in bytes
|
|
* @align: alignment of the region
|
|
* @goal: preferred starting address of the region
|
|
*
|
|
* The goal is dropped if it can not be satisfied and the allocation will
|
|
* fall back to memory below @goal.
|
|
*
|
|
* Allocation may happen on any node in the system.
|
|
*
|
|
* Returns NULL on failure.
|
|
*/
|
|
void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
|
|
unsigned long goal)
|
|
{
|
|
unsigned long limit = -1UL;
|
|
|
|
return ___alloc_bootmem_nopanic(size, align, goal, limit);
|
|
}
|
|
|
|
static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
|
|
unsigned long goal, unsigned long limit)
|
|
{
|
|
void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
|
|
|
|
if (mem)
|
|
return mem;
|
|
/*
|
|
* Whoops, we cannot satisfy the allocation request.
|
|
*/
|
|
printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
|
|
panic("Out of memory");
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* __alloc_bootmem - allocate boot memory
|
|
* @size: size of the request in bytes
|
|
* @align: alignment of the region
|
|
* @goal: preferred starting address of the region
|
|
*
|
|
* The goal is dropped if it can not be satisfied and the allocation will
|
|
* fall back to memory below @goal.
|
|
*
|
|
* Allocation may happen on any node in the system.
|
|
*
|
|
* The function panics if the request can not be satisfied.
|
|
*/
|
|
void * __init __alloc_bootmem(unsigned long size, unsigned long align,
|
|
unsigned long goal)
|
|
{
|
|
unsigned long limit = -1UL;
|
|
|
|
return ___alloc_bootmem(size, align, goal, limit);
|
|
}
|
|
|
|
/**
|
|
* __alloc_bootmem_node - allocate boot memory from a specific node
|
|
* @pgdat: node to allocate from
|
|
* @size: size of the request in bytes
|
|
* @align: alignment of the region
|
|
* @goal: preferred starting address of the region
|
|
*
|
|
* The goal is dropped if it can not be satisfied and the allocation will
|
|
* fall back to memory below @goal.
|
|
*
|
|
* Allocation may fall back to any node in the system if the specified node
|
|
* can not hold the requested memory.
|
|
*
|
|
* The function panics if the request can not be satisfied.
|
|
*/
|
|
void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
|
|
unsigned long align, unsigned long goal)
|
|
{
|
|
void *ptr;
|
|
|
|
if (WARN_ON_ONCE(slab_is_available()))
|
|
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
|
|
|
|
ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
|
|
goal, -1ULL);
|
|
if (ptr)
|
|
return ptr;
|
|
|
|
return __alloc_memory_core_early(MAX_NUMNODES, size, align,
|
|
goal, -1ULL);
|
|
}
|
|
|
|
void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
|
|
unsigned long align, unsigned long goal)
|
|
{
|
|
return __alloc_bootmem_node(pgdat, size, align, goal);
|
|
}
|
|
|
|
#ifdef CONFIG_SPARSEMEM
|
|
/**
|
|
* alloc_bootmem_section - allocate boot memory from a specific section
|
|
* @size: size of the request in bytes
|
|
* @section_nr: sparse map section to allocate from
|
|
*
|
|
* Return NULL on failure.
|
|
*/
|
|
void * __init alloc_bootmem_section(unsigned long size,
|
|
unsigned long section_nr)
|
|
{
|
|
unsigned long pfn, goal, limit;
|
|
|
|
pfn = section_nr_to_pfn(section_nr);
|
|
goal = pfn << PAGE_SHIFT;
|
|
limit = section_nr_to_pfn(section_nr + 1) << PAGE_SHIFT;
|
|
|
|
return __alloc_memory_core_early(early_pfn_to_nid(pfn), size,
|
|
SMP_CACHE_BYTES, goal, limit);
|
|
}
|
|
#endif
|
|
|
|
void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
|
|
unsigned long align, unsigned long goal)
|
|
{
|
|
void *ptr;
|
|
|
|
if (WARN_ON_ONCE(slab_is_available()))
|
|
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
|
|
|
|
ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
|
|
goal, -1ULL);
|
|
if (ptr)
|
|
return ptr;
|
|
|
|
return __alloc_bootmem_nopanic(size, align, goal);
|
|
}
|
|
|
|
#ifndef ARCH_LOW_ADDRESS_LIMIT
|
|
#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
|
|
#endif
|
|
|
|
/**
|
|
* __alloc_bootmem_low - allocate low boot memory
|
|
* @size: size of the request in bytes
|
|
* @align: alignment of the region
|
|
* @goal: preferred starting address of the region
|
|
*
|
|
* The goal is dropped if it can not be satisfied and the allocation will
|
|
* fall back to memory below @goal.
|
|
*
|
|
* Allocation may happen on any node in the system.
|
|
*
|
|
* The function panics if the request can not be satisfied.
|
|
*/
|
|
void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
|
|
unsigned long goal)
|
|
{
|
|
return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
|
|
}
|
|
|
|
/**
|
|
* __alloc_bootmem_low_node - allocate low boot memory from a specific node
|
|
* @pgdat: node to allocate from
|
|
* @size: size of the request in bytes
|
|
* @align: alignment of the region
|
|
* @goal: preferred starting address of the region
|
|
*
|
|
* The goal is dropped if it can not be satisfied and the allocation will
|
|
* fall back to memory below @goal.
|
|
*
|
|
* Allocation may fall back to any node in the system if the specified node
|
|
* can not hold the requested memory.
|
|
*
|
|
* The function panics if the request can not be satisfied.
|
|
*/
|
|
void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
|
|
unsigned long align, unsigned long goal)
|
|
{
|
|
void *ptr;
|
|
|
|
if (WARN_ON_ONCE(slab_is_available()))
|
|
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
|
|
|
|
ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
|
|
goal, ARCH_LOW_ADDRESS_LIMIT);
|
|
if (ptr)
|
|
return ptr;
|
|
|
|
return __alloc_memory_core_early(MAX_NUMNODES, size, align,
|
|
goal, ARCH_LOW_ADDRESS_LIMIT);
|
|
}
|