2008-05-11 07:30:15 +00:00
|
|
|
/*
|
|
|
|
* Handle the memory map.
|
|
|
|
* The functions here do the job until bootmem takes over.
|
|
|
|
*
|
|
|
|
* Getting sanitize_e820_map() in sync with i386 version by applying change:
|
|
|
|
* - Provisions for empty E820 memory regions (reported by certain BIOSes).
|
|
|
|
* Alex Achenbach <xela@slit.de>, December 2002.
|
|
|
|
* Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/bootmem.h>
|
|
|
|
#include <linux/ioport.h>
|
|
|
|
#include <linux/string.h>
|
|
|
|
#include <linux/kexec.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/mm.h>
|
|
|
|
#include <linux/pfn.h>
|
2008-05-21 03:10:58 +00:00
|
|
|
#include <linux/suspend.h>
|
2008-05-11 07:30:15 +00:00
|
|
|
|
|
|
|
#include <asm/pgtable.h>
|
|
|
|
#include <asm/page.h>
|
|
|
|
#include <asm/e820.h>
|
2008-05-18 08:18:57 +00:00
|
|
|
#include <asm/proto.h>
|
2008-05-11 07:30:15 +00:00
|
|
|
#include <asm/setup.h>
|
2008-05-18 08:18:57 +00:00
|
|
|
#include <asm/trampoline.h>
|
2008-05-11 07:30:15 +00:00
|
|
|
|
|
|
|
struct e820map e820;
|
|
|
|
|
|
|
|
/* For PCI or other memory-mapped resources */
|
|
|
|
unsigned long pci_mem_start = 0xaeedbabe;
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
EXPORT_SYMBOL(pci_mem_start);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This function checks if any part of the range <start,end> is mapped
|
|
|
|
* with type.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
e820_any_mapped(u64 start, u64 end, unsigned type)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < e820.nr_map; i++) {
|
|
|
|
struct e820entry *ei = &e820.map[i];
|
|
|
|
|
|
|
|
if (type && ei->type != type)
|
|
|
|
continue;
|
|
|
|
if (ei->addr >= end || ei->addr + ei->size <= start)
|
|
|
|
continue;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(e820_any_mapped);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This function checks if the entire range <start,end> is mapped with type.
|
|
|
|
*
|
|
|
|
* Note: this function only works correct if the e820 table is sorted and
|
|
|
|
* not-overlapping, which is the case
|
|
|
|
*/
|
|
|
|
int __init e820_all_mapped(u64 start, u64 end, unsigned type)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < e820.nr_map; i++) {
|
|
|
|
struct e820entry *ei = &e820.map[i];
|
|
|
|
|
|
|
|
if (type && ei->type != type)
|
|
|
|
continue;
|
|
|
|
/* is the region (part) in overlap with the current region ?*/
|
|
|
|
if (ei->addr >= end || ei->addr + ei->size <= start)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* if the region is at the beginning of <start,end> we move
|
|
|
|
* start to the end of the region since it's ok until there
|
|
|
|
*/
|
|
|
|
if (ei->addr <= start)
|
|
|
|
start = ei->addr + ei->size;
|
|
|
|
/*
|
|
|
|
* if start is now at or beyond end, we're done, full
|
|
|
|
* coverage
|
|
|
|
*/
|
|
|
|
if (start >= end)
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add a memory region to the kernel e820 map.
|
|
|
|
*/
|
2008-06-16 01:58:51 +00:00
|
|
|
void __init e820_add_region(u64 start, u64 size, int type)
|
2008-05-11 07:30:15 +00:00
|
|
|
{
|
|
|
|
int x = e820.nr_map;
|
|
|
|
|
2008-05-14 15:15:34 +00:00
|
|
|
if (x == ARRAY_SIZE(e820.map)) {
|
2008-05-11 07:30:15 +00:00
|
|
|
printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
e820.map[x].addr = start;
|
|
|
|
e820.map[x].size = size;
|
|
|
|
e820.map[x].type = type;
|
|
|
|
e820.nr_map++;
|
|
|
|
}
|
|
|
|
|
|
|
|
void __init e820_print_map(char *who)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < e820.nr_map; i++) {
|
|
|
|
printk(KERN_INFO " %s: %016Lx - %016Lx ", who,
|
|
|
|
(unsigned long long) e820.map[i].addr,
|
|
|
|
(unsigned long long)
|
|
|
|
(e820.map[i].addr + e820.map[i].size));
|
|
|
|
switch (e820.map[i].type) {
|
|
|
|
case E820_RAM:
|
|
|
|
printk(KERN_CONT "(usable)\n");
|
|
|
|
break;
|
|
|
|
case E820_RESERVED:
|
|
|
|
printk(KERN_CONT "(reserved)\n");
|
|
|
|
break;
|
|
|
|
case E820_ACPI:
|
|
|
|
printk(KERN_CONT "(ACPI data)\n");
|
|
|
|
break;
|
|
|
|
case E820_NVS:
|
|
|
|
printk(KERN_CONT "(ACPI NVS)\n");
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
printk(KERN_CONT "type %u\n", e820.map[i].type);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Sanitize the BIOS e820 map.
|
|
|
|
*
|
|
|
|
* Some e820 responses include overlapping entries. The following
|
2008-05-14 15:15:52 +00:00
|
|
|
* replaces the original e820 map with a new one, removing overlaps,
|
|
|
|
* and resolving conflicting memory types in favor of highest
|
|
|
|
* numbered type.
|
2008-05-11 07:30:15 +00:00
|
|
|
*
|
2008-05-14 15:15:52 +00:00
|
|
|
* The input parameter biosmap points to an array of 'struct
|
|
|
|
* e820entry' which on entry has elements in the range [0, *pnr_map)
|
|
|
|
* valid, and which has space for up to max_nr_map entries.
|
|
|
|
* On return, the resulting sanitized e820 map entries will be in
|
|
|
|
* overwritten in the same location, starting at biosmap.
|
|
|
|
*
|
|
|
|
* The integer pointed to by pnr_map must be valid on entry (the
|
|
|
|
* current number of valid entries located at biosmap) and will
|
|
|
|
* be updated on return, with the new number of valid entries
|
|
|
|
* (something no more than max_nr_map.)
|
|
|
|
*
|
|
|
|
* The return value from sanitize_e820_map() is zero if it
|
|
|
|
* successfully 'sanitized' the map entries passed in, and is -1
|
|
|
|
* if it did nothing, which can happen if either of (1) it was
|
|
|
|
* only passed one map entry, or (2) any of the input map entries
|
|
|
|
* were invalid (start + size < start, meaning that the size was
|
|
|
|
* so big the described memory range wrapped around through zero.)
|
|
|
|
*
|
|
|
|
* Visually we're performing the following
|
|
|
|
* (1,2,3,4 = memory types)...
|
|
|
|
*
|
|
|
|
* Sample memory map (w/overlaps):
|
|
|
|
* ____22__________________
|
|
|
|
* ______________________4_
|
|
|
|
* ____1111________________
|
|
|
|
* _44_____________________
|
|
|
|
* 11111111________________
|
|
|
|
* ____________________33__
|
|
|
|
* ___________44___________
|
|
|
|
* __________33333_________
|
|
|
|
* ______________22________
|
|
|
|
* ___________________2222_
|
|
|
|
* _________111111111______
|
|
|
|
* _____________________11_
|
|
|
|
* _________________4______
|
|
|
|
*
|
|
|
|
* Sanitized equivalent (no overlap):
|
|
|
|
* 1_______________________
|
|
|
|
* _44_____________________
|
|
|
|
* ___1____________________
|
|
|
|
* ____22__________________
|
|
|
|
* ______11________________
|
|
|
|
* _________1______________
|
|
|
|
* __________3_____________
|
|
|
|
* ___________44___________
|
|
|
|
* _____________33_________
|
|
|
|
* _______________2________
|
|
|
|
* ________________1_______
|
|
|
|
* _________________4______
|
|
|
|
* ___________________2____
|
|
|
|
* ____________________33__
|
|
|
|
* ______________________4_
|
2008-05-11 07:30:15 +00:00
|
|
|
*/
|
2008-05-14 15:15:52 +00:00
|
|
|
|
2008-05-14 15:15:34 +00:00
|
|
|
int __init sanitize_e820_map(struct e820entry *biosmap, int max_nr_map,
|
2008-05-14 15:15:46 +00:00
|
|
|
int *pnr_map)
|
2008-05-11 07:30:15 +00:00
|
|
|
{
|
|
|
|
struct change_member {
|
|
|
|
struct e820entry *pbios; /* pointer to original bios entry */
|
|
|
|
unsigned long long addr; /* address for this change point */
|
|
|
|
};
|
2008-05-14 15:15:40 +00:00
|
|
|
static struct change_member change_point_list[2*E820_X_MAX] __initdata;
|
|
|
|
static struct change_member *change_point[2*E820_X_MAX] __initdata;
|
|
|
|
static struct e820entry *overlap_list[E820_X_MAX] __initdata;
|
|
|
|
static struct e820entry new_bios[E820_X_MAX] __initdata;
|
2008-05-11 07:30:15 +00:00
|
|
|
struct change_member *change_tmp;
|
|
|
|
unsigned long current_type, last_type;
|
|
|
|
unsigned long long last_addr;
|
|
|
|
int chgidx, still_changing;
|
|
|
|
int overlap_entries;
|
|
|
|
int new_bios_entry;
|
|
|
|
int old_nr, new_nr, chg_nr;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* if there's only one memory region, don't bother */
|
|
|
|
if (*pnr_map < 2)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
old_nr = *pnr_map;
|
2008-05-14 15:15:46 +00:00
|
|
|
BUG_ON(old_nr > max_nr_map);
|
2008-05-11 07:30:15 +00:00
|
|
|
|
|
|
|
/* bail out if we find any unreasonable addresses in bios map */
|
|
|
|
for (i = 0; i < old_nr; i++)
|
|
|
|
if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* create pointers for initial change-point information (for sorting) */
|
|
|
|
for (i = 0; i < 2 * old_nr; i++)
|
|
|
|
change_point[i] = &change_point_list[i];
|
|
|
|
|
|
|
|
/* record all known change-points (starting and ending addresses),
|
|
|
|
omitting those that are for empty memory regions */
|
|
|
|
chgidx = 0;
|
|
|
|
for (i = 0; i < old_nr; i++) {
|
|
|
|
if (biosmap[i].size != 0) {
|
|
|
|
change_point[chgidx]->addr = biosmap[i].addr;
|
|
|
|
change_point[chgidx++]->pbios = &biosmap[i];
|
|
|
|
change_point[chgidx]->addr = biosmap[i].addr +
|
|
|
|
biosmap[i].size;
|
|
|
|
change_point[chgidx++]->pbios = &biosmap[i];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
chg_nr = chgidx;
|
|
|
|
|
|
|
|
/* sort change-point list by memory addresses (low -> high) */
|
|
|
|
still_changing = 1;
|
|
|
|
while (still_changing) {
|
|
|
|
still_changing = 0;
|
|
|
|
for (i = 1; i < chg_nr; i++) {
|
|
|
|
unsigned long long curaddr, lastaddr;
|
|
|
|
unsigned long long curpbaddr, lastpbaddr;
|
|
|
|
|
|
|
|
curaddr = change_point[i]->addr;
|
|
|
|
lastaddr = change_point[i - 1]->addr;
|
|
|
|
curpbaddr = change_point[i]->pbios->addr;
|
|
|
|
lastpbaddr = change_point[i - 1]->pbios->addr;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* swap entries, when:
|
|
|
|
*
|
|
|
|
* curaddr > lastaddr or
|
|
|
|
* curaddr == lastaddr and curaddr == curpbaddr and
|
|
|
|
* lastaddr != lastpbaddr
|
|
|
|
*/
|
|
|
|
if (curaddr < lastaddr ||
|
|
|
|
(curaddr == lastaddr && curaddr == curpbaddr &&
|
|
|
|
lastaddr != lastpbaddr)) {
|
|
|
|
change_tmp = change_point[i];
|
|
|
|
change_point[i] = change_point[i-1];
|
|
|
|
change_point[i-1] = change_tmp;
|
|
|
|
still_changing = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* create a new bios memory map, removing overlaps */
|
|
|
|
overlap_entries = 0; /* number of entries in the overlap table */
|
|
|
|
new_bios_entry = 0; /* index for creating new bios map entries */
|
|
|
|
last_type = 0; /* start with undefined memory type */
|
|
|
|
last_addr = 0; /* start with 0 as last starting address */
|
|
|
|
|
|
|
|
/* loop through change-points, determining affect on the new bios map */
|
|
|
|
for (chgidx = 0; chgidx < chg_nr; chgidx++) {
|
|
|
|
/* keep track of all overlapping bios entries */
|
|
|
|
if (change_point[chgidx]->addr ==
|
|
|
|
change_point[chgidx]->pbios->addr) {
|
|
|
|
/*
|
|
|
|
* add map entry to overlap list (> 1 entry
|
|
|
|
* implies an overlap)
|
|
|
|
*/
|
|
|
|
overlap_list[overlap_entries++] =
|
|
|
|
change_point[chgidx]->pbios;
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* remove entry from list (order independent,
|
|
|
|
* so swap with last)
|
|
|
|
*/
|
|
|
|
for (i = 0; i < overlap_entries; i++) {
|
|
|
|
if (overlap_list[i] ==
|
|
|
|
change_point[chgidx]->pbios)
|
|
|
|
overlap_list[i] =
|
|
|
|
overlap_list[overlap_entries-1];
|
|
|
|
}
|
|
|
|
overlap_entries--;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* if there are overlapping entries, decide which
|
|
|
|
* "type" to use (larger value takes precedence --
|
|
|
|
* 1=usable, 2,3,4,4+=unusable)
|
|
|
|
*/
|
|
|
|
current_type = 0;
|
|
|
|
for (i = 0; i < overlap_entries; i++)
|
|
|
|
if (overlap_list[i]->type > current_type)
|
|
|
|
current_type = overlap_list[i]->type;
|
|
|
|
/*
|
|
|
|
* continue building up new bios map based on this
|
|
|
|
* information
|
|
|
|
*/
|
|
|
|
if (current_type != last_type) {
|
|
|
|
if (last_type != 0) {
|
|
|
|
new_bios[new_bios_entry].size =
|
|
|
|
change_point[chgidx]->addr - last_addr;
|
|
|
|
/*
|
|
|
|
* move forward only if the new size
|
|
|
|
* was non-zero
|
|
|
|
*/
|
|
|
|
if (new_bios[new_bios_entry].size != 0)
|
|
|
|
/*
|
|
|
|
* no more space left for new
|
|
|
|
* bios entries ?
|
|
|
|
*/
|
2008-05-14 15:15:34 +00:00
|
|
|
if (++new_bios_entry >= max_nr_map)
|
2008-05-11 07:30:15 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (current_type != 0) {
|
|
|
|
new_bios[new_bios_entry].addr =
|
|
|
|
change_point[chgidx]->addr;
|
|
|
|
new_bios[new_bios_entry].type = current_type;
|
|
|
|
last_addr = change_point[chgidx]->addr;
|
|
|
|
}
|
|
|
|
last_type = current_type;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* retain count for new bios entries */
|
|
|
|
new_nr = new_bios_entry;
|
|
|
|
|
|
|
|
/* copy new bios mapping into original location */
|
|
|
|
memcpy(biosmap, new_bios, new_nr * sizeof(struct e820entry));
|
|
|
|
*pnr_map = new_nr;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-06-11 03:33:39 +00:00
|
|
|
static int __init __copy_e820_map(struct e820entry *biosmap, int nr_map)
|
|
|
|
{
|
|
|
|
while (nr_map) {
|
|
|
|
u64 start = biosmap->addr;
|
|
|
|
u64 size = biosmap->size;
|
|
|
|
u64 end = start + size;
|
|
|
|
u32 type = biosmap->type;
|
|
|
|
|
|
|
|
/* Overflow in 64 bits? Ignore the memory map. */
|
|
|
|
if (start > end)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
e820_add_region(start, size, type);
|
|
|
|
|
|
|
|
biosmap++;
|
|
|
|
nr_map--;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-05-11 07:30:15 +00:00
|
|
|
/*
|
|
|
|
* Copy the BIOS e820 map into a safe place.
|
|
|
|
*
|
|
|
|
* Sanity-check it while we're at it..
|
|
|
|
*
|
|
|
|
* If we're lucky and live on a modern system, the setup code
|
|
|
|
* will have given us a memory map that we can use to properly
|
|
|
|
* set up memory. If we aren't, we'll fake a memory map.
|
|
|
|
*/
|
|
|
|
int __init copy_e820_map(struct e820entry *biosmap, int nr_map)
|
|
|
|
{
|
|
|
|
/* Only one memory region (or negative)? Ignore it */
|
|
|
|
if (nr_map < 2)
|
|
|
|
return -1;
|
|
|
|
|
2008-06-11 03:33:39 +00:00
|
|
|
return __copy_e820_map(biosmap, nr_map);
|
2008-05-11 07:30:15 +00:00
|
|
|
}
|
|
|
|
|
2008-06-16 01:58:51 +00:00
|
|
|
u64 __init e820_update_range(u64 start, u64 size, unsigned old_type,
|
2008-05-11 07:30:15 +00:00
|
|
|
unsigned new_type)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
u64 real_updated_size = 0;
|
|
|
|
|
|
|
|
BUG_ON(old_type == new_type);
|
|
|
|
|
|
|
|
for (i = 0; i < e820.nr_map; i++) {
|
|
|
|
struct e820entry *ei = &e820.map[i];
|
|
|
|
u64 final_start, final_end;
|
|
|
|
if (ei->type != old_type)
|
|
|
|
continue;
|
|
|
|
/* totally covered? */
|
|
|
|
if (ei->addr >= start &&
|
|
|
|
(ei->addr + ei->size) <= (start + size)) {
|
|
|
|
ei->type = new_type;
|
|
|
|
real_updated_size += ei->size;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
/* partially covered */
|
|
|
|
final_start = max(start, ei->addr);
|
|
|
|
final_end = min(start + size, ei->addr + ei->size);
|
|
|
|
if (final_start >= final_end)
|
|
|
|
continue;
|
2008-06-16 01:58:51 +00:00
|
|
|
e820_add_region(final_start, final_end - final_start,
|
2008-05-11 07:30:15 +00:00
|
|
|
new_type);
|
|
|
|
real_updated_size += final_end - final_start;
|
|
|
|
}
|
|
|
|
return real_updated_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
void __init update_e820(void)
|
|
|
|
{
|
2008-05-14 15:15:46 +00:00
|
|
|
int nr_map;
|
2008-05-11 07:30:15 +00:00
|
|
|
|
|
|
|
nr_map = e820.nr_map;
|
2008-05-14 15:15:34 +00:00
|
|
|
if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &nr_map))
|
2008-05-11 07:30:15 +00:00
|
|
|
return;
|
|
|
|
e820.nr_map = nr_map;
|
|
|
|
printk(KERN_INFO "modified physical RAM map:\n");
|
|
|
|
e820_print_map("modified");
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Search for the biggest gap in the low 32 bits of the e820
|
|
|
|
* memory space. We pass this space to PCI to assign MMIO resources
|
|
|
|
* for hotplug or unconfigured devices in.
|
|
|
|
* Hopefully the BIOS let enough space left.
|
|
|
|
*/
|
|
|
|
__init void e820_setup_gap(void)
|
|
|
|
{
|
|
|
|
unsigned long gapstart, gapsize, round;
|
|
|
|
unsigned long long last;
|
|
|
|
int i;
|
|
|
|
int found = 0;
|
|
|
|
|
|
|
|
last = 0x100000000ull;
|
|
|
|
gapstart = 0x10000000;
|
|
|
|
gapsize = 0x400000;
|
|
|
|
i = e820.nr_map;
|
|
|
|
while (--i >= 0) {
|
|
|
|
unsigned long long start = e820.map[i].addr;
|
|
|
|
unsigned long long end = start + e820.map[i].size;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Since "last" is at most 4GB, we know we'll
|
|
|
|
* fit in 32 bits if this condition is true
|
|
|
|
*/
|
|
|
|
if (last > end) {
|
|
|
|
unsigned long gap = last - end;
|
|
|
|
|
|
|
|
if (gap > gapsize) {
|
|
|
|
gapsize = gap;
|
|
|
|
gapstart = end;
|
|
|
|
found = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (start < last)
|
|
|
|
last = start;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_X86_64
|
|
|
|
if (!found) {
|
|
|
|
gapstart = (end_pfn << PAGE_SHIFT) + 1024*1024;
|
|
|
|
printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit "
|
|
|
|
"address range\n"
|
|
|
|
KERN_ERR "PCI: Unassigned devices with 32bit resource "
|
|
|
|
"registers may break!\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* See how much we want to round up: start off with
|
|
|
|
* rounding to the next 1MB area.
|
|
|
|
*/
|
|
|
|
round = 0x100000;
|
|
|
|
while ((gapsize >> 4) > round)
|
|
|
|
round += round;
|
|
|
|
/* Fun with two's complement */
|
|
|
|
pci_mem_start = (gapstart + round) & -round;
|
|
|
|
|
|
|
|
printk(KERN_INFO
|
|
|
|
"Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
|
|
|
|
pci_mem_start, gapstart, gapsize);
|
|
|
|
}
|
|
|
|
|
2008-06-11 03:33:39 +00:00
|
|
|
/**
|
|
|
|
* Because of the size limitation of struct boot_params, only first
|
|
|
|
* 128 E820 memory entries are passed to kernel via
|
|
|
|
* boot_params.e820_map, others are passed via SETUP_E820_EXT node of
|
|
|
|
* linked list of struct setup_data, which is parsed here.
|
|
|
|
*/
|
|
|
|
void __init parse_e820_ext(struct setup_data *sdata, unsigned long pa_data)
|
|
|
|
{
|
|
|
|
u32 map_len;
|
|
|
|
int entries;
|
|
|
|
struct e820entry *extmap;
|
|
|
|
|
|
|
|
entries = sdata->len / sizeof(struct e820entry);
|
|
|
|
map_len = sdata->len + sizeof(struct setup_data);
|
|
|
|
if (map_len > PAGE_SIZE)
|
|
|
|
sdata = early_ioremap(pa_data, map_len);
|
|
|
|
extmap = (struct e820entry *)(sdata->data);
|
|
|
|
__copy_e820_map(extmap, entries);
|
|
|
|
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
|
|
|
|
if (map_len > PAGE_SIZE)
|
|
|
|
early_iounmap(sdata, map_len);
|
|
|
|
printk(KERN_INFO "extended physical RAM map:\n");
|
|
|
|
e820_print_map("extended");
|
|
|
|
}
|
|
|
|
|
2008-05-21 03:10:58 +00:00
|
|
|
#if defined(CONFIG_X86_64) || \
|
|
|
|
(defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION))
|
|
|
|
/**
|
|
|
|
* Find the ranges of physical addresses that do not correspond to
|
|
|
|
* e820 RAM areas and mark the corresponding pages as nosave for
|
|
|
|
* hibernation (32 bit) or software suspend and suspend to RAM (64 bit).
|
|
|
|
*
|
|
|
|
* This function requires the e820 map to be sorted and without any
|
|
|
|
* overlapping entries and assumes the first e820 area to be RAM.
|
|
|
|
*/
|
|
|
|
void __init e820_mark_nosave_regions(unsigned long limit_pfn)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
unsigned long pfn;
|
|
|
|
|
|
|
|
pfn = PFN_DOWN(e820.map[0].addr + e820.map[0].size);
|
|
|
|
for (i = 1; i < e820.nr_map; i++) {
|
|
|
|
struct e820entry *ei = &e820.map[i];
|
|
|
|
|
|
|
|
if (pfn < PFN_UP(ei->addr))
|
|
|
|
register_nosave_region(pfn, PFN_UP(ei->addr));
|
|
|
|
|
|
|
|
pfn = PFN_DOWN(ei->addr + ei->size);
|
|
|
|
if (ei->type != E820_RAM)
|
|
|
|
register_nosave_region(PFN_UP(ei->addr), pfn);
|
|
|
|
|
|
|
|
if (pfn >= limit_pfn)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
2008-05-18 08:18:57 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Early reserved memory areas.
|
|
|
|
*/
|
|
|
|
#define MAX_EARLY_RES 20
|
|
|
|
|
|
|
|
struct early_res {
|
|
|
|
u64 start, end;
|
|
|
|
char name[16];
|
|
|
|
};
|
|
|
|
static struct early_res early_res[MAX_EARLY_RES] __initdata = {
|
|
|
|
{ 0, PAGE_SIZE, "BIOS data page" }, /* BIOS data page */
|
|
|
|
#if defined(CONFIG_X86_64) && defined(CONFIG_X86_TRAMPOLINE)
|
|
|
|
{ TRAMPOLINE_BASE, TRAMPOLINE_BASE + 2 * PAGE_SIZE, "TRAMPOLINE" },
|
|
|
|
#endif
|
|
|
|
#if defined(CONFIG_X86_32) && defined(CONFIG_SMP)
|
|
|
|
/*
|
|
|
|
* But first pinch a few for the stack/trampoline stuff
|
|
|
|
* FIXME: Don't need the extra page at 4K, but need to fix
|
|
|
|
* trampoline before removing it. (see the GDT stuff)
|
|
|
|
*/
|
|
|
|
{ PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE" },
|
|
|
|
/*
|
|
|
|
* Has to be in very low memory so we can execute
|
|
|
|
* real-mode AP code.
|
|
|
|
*/
|
|
|
|
{ TRAMPOLINE_BASE, TRAMPOLINE_BASE + PAGE_SIZE, "TRAMPOLINE" },
|
|
|
|
#endif
|
|
|
|
{}
|
|
|
|
};
|
|
|
|
|
2008-06-02 06:26:14 +00:00
|
|
|
static int __init find_overlapped_early(u64 start, u64 end)
|
2008-05-18 08:18:57 +00:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct early_res *r;
|
2008-06-02 06:26:14 +00:00
|
|
|
|
2008-05-18 08:18:57 +00:00
|
|
|
for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
|
|
|
|
r = &early_res[i];
|
|
|
|
if (end > r->start && start < r->end)
|
2008-06-02 06:26:14 +00:00
|
|
|
break;
|
2008-05-18 08:18:57 +00:00
|
|
|
}
|
2008-06-02 06:26:14 +00:00
|
|
|
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
|
|
|
void __init reserve_early(u64 start, u64 end, char *name)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct early_res *r;
|
|
|
|
|
|
|
|
i = find_overlapped_early(start, end);
|
2008-05-18 08:18:57 +00:00
|
|
|
if (i >= MAX_EARLY_RES)
|
|
|
|
panic("Too many early reservations");
|
|
|
|
r = &early_res[i];
|
2008-06-02 06:26:14 +00:00
|
|
|
if (r->end)
|
|
|
|
panic("Overlapping early reservations "
|
|
|
|
"%llx-%llx %s to %llx-%llx %s\n",
|
|
|
|
start, end - 1, name?name:"", r->start,
|
|
|
|
r->end - 1, r->name);
|
2008-05-18 08:18:57 +00:00
|
|
|
r->start = start;
|
|
|
|
r->end = end;
|
|
|
|
if (name)
|
|
|
|
strncpy(r->name, name, sizeof(r->name) - 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
void __init free_early(u64 start, u64 end)
|
|
|
|
{
|
|
|
|
struct early_res *r;
|
|
|
|
int i, j;
|
|
|
|
|
2008-06-02 06:26:14 +00:00
|
|
|
i = find_overlapped_early(start, end);
|
|
|
|
r = &early_res[i];
|
|
|
|
if (i >= MAX_EARLY_RES || r->end != end || r->start != start)
|
2008-05-18 08:18:57 +00:00
|
|
|
panic("free_early on not reserved area: %llx-%llx!",
|
2008-06-02 06:26:14 +00:00
|
|
|
start, end - 1);
|
2008-05-18 08:18:57 +00:00
|
|
|
|
|
|
|
for (j = i + 1; j < MAX_EARLY_RES && early_res[j].end; j++)
|
|
|
|
;
|
|
|
|
|
|
|
|
memmove(&early_res[i], &early_res[i + 1],
|
|
|
|
(j - 1 - i) * sizeof(struct early_res));
|
|
|
|
|
|
|
|
early_res[j - 1].end = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void __init early_res_to_bootmem(u64 start, u64 end)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
u64 final_start, final_end;
|
|
|
|
for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
|
|
|
|
struct early_res *r = &early_res[i];
|
|
|
|
final_start = max(start, r->start);
|
|
|
|
final_end = min(end, r->end);
|
|
|
|
if (final_start >= final_end)
|
|
|
|
continue;
|
|
|
|
printk(KERN_INFO " early res: %d [%llx-%llx] %s\n", i,
|
|
|
|
final_start, final_end - 1, r->name);
|
2008-06-13 09:00:56 +00:00
|
|
|
reserve_bootmem_generic(final_start, final_end - final_start,
|
2008-05-18 08:18:57 +00:00
|
|
|
BOOTMEM_DEFAULT);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check for already reserved areas */
|
|
|
|
static inline int __init bad_addr(u64 *addrp, u64 size, u64 align)
|
|
|
|
{
|
|
|
|
int i;
|
2008-06-02 06:26:14 +00:00
|
|
|
u64 addr = *addrp;
|
2008-05-18 08:18:57 +00:00
|
|
|
int changed = 0;
|
2008-06-02 06:26:14 +00:00
|
|
|
struct early_res *r;
|
2008-05-18 08:18:57 +00:00
|
|
|
again:
|
2008-06-02 06:26:14 +00:00
|
|
|
i = find_overlapped_early(addr, addr + size);
|
|
|
|
r = &early_res[i];
|
|
|
|
if (i < MAX_EARLY_RES && r->end) {
|
|
|
|
*addrp = addr = round_up(r->end, align);
|
|
|
|
changed = 1;
|
|
|
|
goto again;
|
2008-05-18 08:18:57 +00:00
|
|
|
}
|
|
|
|
return changed;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check for already reserved areas */
|
|
|
|
static inline int __init bad_addr_size(u64 *addrp, u64 *sizep, u64 align)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
u64 addr = *addrp, last;
|
|
|
|
u64 size = *sizep;
|
|
|
|
int changed = 0;
|
|
|
|
again:
|
|
|
|
last = addr + size;
|
|
|
|
for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
|
|
|
|
struct early_res *r = &early_res[i];
|
|
|
|
if (last > r->start && addr < r->start) {
|
|
|
|
size = r->start - addr;
|
|
|
|
changed = 1;
|
|
|
|
goto again;
|
|
|
|
}
|
|
|
|
if (last > r->end && addr < r->end) {
|
|
|
|
addr = round_up(r->end, align);
|
|
|
|
size = last - addr;
|
|
|
|
changed = 1;
|
|
|
|
goto again;
|
|
|
|
}
|
|
|
|
if (last <= r->end && addr >= r->start) {
|
|
|
|
(*sizep)++;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (changed) {
|
|
|
|
*addrp = addr;
|
|
|
|
*sizep = size;
|
|
|
|
}
|
|
|
|
return changed;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Find a free area with specified alignment in a specific range.
|
|
|
|
*/
|
|
|
|
u64 __init find_e820_area(u64 start, u64 end, u64 size, u64 align)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < e820.nr_map; i++) {
|
|
|
|
struct e820entry *ei = &e820.map[i];
|
|
|
|
u64 addr, last;
|
|
|
|
u64 ei_last;
|
|
|
|
|
|
|
|
if (ei->type != E820_RAM)
|
|
|
|
continue;
|
|
|
|
addr = round_up(ei->addr, align);
|
|
|
|
ei_last = ei->addr + ei->size;
|
|
|
|
if (addr < start)
|
|
|
|
addr = round_up(start, align);
|
|
|
|
if (addr >= ei_last)
|
|
|
|
continue;
|
|
|
|
while (bad_addr(&addr, size, align) && addr+size <= ei_last)
|
|
|
|
;
|
|
|
|
last = addr + size;
|
|
|
|
if (last > ei_last)
|
|
|
|
continue;
|
|
|
|
if (last > end)
|
|
|
|
continue;
|
|
|
|
return addr;
|
|
|
|
}
|
|
|
|
return -1ULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Find next free range after *start
|
|
|
|
*/
|
|
|
|
u64 __init find_e820_area_size(u64 start, u64 *sizep, u64 align)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < e820.nr_map; i++) {
|
|
|
|
struct e820entry *ei = &e820.map[i];
|
|
|
|
u64 addr, last;
|
|
|
|
u64 ei_last;
|
|
|
|
|
|
|
|
if (ei->type != E820_RAM)
|
|
|
|
continue;
|
|
|
|
addr = round_up(ei->addr, align);
|
|
|
|
ei_last = ei->addr + ei->size;
|
|
|
|
if (addr < start)
|
|
|
|
addr = round_up(start, align);
|
|
|
|
if (addr >= ei_last)
|
|
|
|
continue;
|
|
|
|
*sizep = ei_last - addr;
|
|
|
|
while (bad_addr_size(&addr, sizep, align) &&
|
|
|
|
addr + *sizep <= ei_last)
|
|
|
|
;
|
|
|
|
last = addr + *sizep;
|
|
|
|
if (last > ei_last)
|
|
|
|
continue;
|
|
|
|
return addr;
|
|
|
|
}
|
|
|
|
return -1UL;
|
|
|
|
|
|
|
|
}
|
2008-06-01 20:17:38 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* pre allocated 4k and reserved it in e820
|
|
|
|
*/
|
|
|
|
u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
|
|
|
|
{
|
|
|
|
u64 size = 0;
|
|
|
|
u64 addr;
|
|
|
|
u64 start;
|
|
|
|
|
|
|
|
start = startt;
|
|
|
|
while (size < sizet)
|
|
|
|
start = find_e820_area_size(start, &size, align);
|
|
|
|
|
|
|
|
if (size < sizet)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
addr = round_down(start + size - sizet, align);
|
2008-06-16 01:58:51 +00:00
|
|
|
e820_update_range(addr, sizet, E820_RAM, E820_RESERVED);
|
2008-06-01 20:17:38 +00:00
|
|
|
printk(KERN_INFO "update e820 for early_reserve_e820\n");
|
|
|
|
update_e820();
|
|
|
|
|
|
|
|
return addr;
|
|
|
|
}
|
|
|
|
|
2008-06-04 02:34:00 +00:00
|
|
|
#ifdef CONFIG_X86_32
|
|
|
|
# ifdef CONFIG_X86_PAE
|
|
|
|
# define MAX_ARCH_PFN (1ULL<<(36-PAGE_SHIFT))
|
|
|
|
# else
|
|
|
|
# define MAX_ARCH_PFN (1ULL<<(32-PAGE_SHIFT))
|
|
|
|
# endif
|
|
|
|
#else /* CONFIG_X86_32 */
|
2008-06-04 20:21:29 +00:00
|
|
|
# define MAX_ARCH_PFN MAXMEM>>PAGE_SHIFT
|
2008-06-04 02:34:00 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Last pfn which the user wants to use.
|
|
|
|
*/
|
|
|
|
unsigned long __initdata end_user_pfn = MAX_ARCH_PFN;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Find the highest page frame number we have available
|
|
|
|
*/
|
|
|
|
unsigned long __init e820_end_of_ram(void)
|
|
|
|
{
|
|
|
|
unsigned long last_pfn;
|
|
|
|
unsigned long max_arch_pfn = MAX_ARCH_PFN;
|
|
|
|
|
|
|
|
last_pfn = find_max_pfn_with_active_regions();
|
|
|
|
|
|
|
|
if (last_pfn > max_arch_pfn)
|
|
|
|
last_pfn = max_arch_pfn;
|
|
|
|
if (last_pfn > end_user_pfn)
|
|
|
|
last_pfn = end_user_pfn;
|
|
|
|
|
|
|
|
printk(KERN_INFO "last_pfn = %lu max_arch_pfn = %lu\n",
|
|
|
|
last_pfn, max_arch_pfn);
|
|
|
|
return last_pfn;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Finds an active region in the address range from start_pfn to last_pfn and
|
|
|
|
* returns its range in ei_startpfn and ei_endpfn for the e820 entry.
|
|
|
|
*/
|
|
|
|
int __init e820_find_active_region(const struct e820entry *ei,
|
|
|
|
unsigned long start_pfn,
|
|
|
|
unsigned long last_pfn,
|
|
|
|
unsigned long *ei_startpfn,
|
|
|
|
unsigned long *ei_endpfn)
|
|
|
|
{
|
|
|
|
u64 align = PAGE_SIZE;
|
|
|
|
|
|
|
|
*ei_startpfn = round_up(ei->addr, align) >> PAGE_SHIFT;
|
|
|
|
*ei_endpfn = round_down(ei->addr + ei->size, align) >> PAGE_SHIFT;
|
|
|
|
|
|
|
|
/* Skip map entries smaller than a page */
|
|
|
|
if (*ei_startpfn >= *ei_endpfn)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Skip if map is outside the node */
|
|
|
|
if (ei->type != E820_RAM || *ei_endpfn <= start_pfn ||
|
|
|
|
*ei_startpfn >= last_pfn)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Check for overlaps */
|
|
|
|
if (*ei_startpfn < start_pfn)
|
|
|
|
*ei_startpfn = start_pfn;
|
|
|
|
if (*ei_endpfn > last_pfn)
|
|
|
|
*ei_endpfn = last_pfn;
|
|
|
|
|
|
|
|
/* Obey end_user_pfn to save on memmap */
|
|
|
|
if (*ei_startpfn >= end_user_pfn)
|
|
|
|
return 0;
|
|
|
|
if (*ei_endpfn > end_user_pfn)
|
|
|
|
*ei_endpfn = end_user_pfn;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Walk the e820 map and register active regions within a node */
|
|
|
|
void __init e820_register_active_regions(int nid, unsigned long start_pfn,
|
|
|
|
unsigned long last_pfn)
|
|
|
|
{
|
|
|
|
unsigned long ei_startpfn;
|
|
|
|
unsigned long ei_endpfn;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < e820.nr_map; i++)
|
|
|
|
if (e820_find_active_region(&e820.map[i],
|
|
|
|
start_pfn, last_pfn,
|
|
|
|
&ei_startpfn, &ei_endpfn))
|
|
|
|
add_active_range(nid, ei_startpfn, ei_endpfn);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Find the hole size (in bytes) in the memory range.
|
|
|
|
* @start: starting address of the memory range to scan
|
|
|
|
* @end: ending address of the memory range to scan
|
|
|
|
*/
|
|
|
|
u64 __init e820_hole_size(u64 start, u64 end)
|
|
|
|
{
|
|
|
|
unsigned long start_pfn = start >> PAGE_SHIFT;
|
|
|
|
unsigned long last_pfn = end >> PAGE_SHIFT;
|
|
|
|
unsigned long ei_startpfn, ei_endpfn, ram = 0;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < e820.nr_map; i++) {
|
|
|
|
if (e820_find_active_region(&e820.map[i],
|
|
|
|
start_pfn, last_pfn,
|
|
|
|
&ei_startpfn, &ei_endpfn))
|
|
|
|
ram += ei_endpfn - ei_startpfn;
|
|
|
|
}
|
|
|
|
return end - start - ((u64)ram << PAGE_SHIFT);
|
|
|
|
}
|
2008-06-10 19:55:54 +00:00
|
|
|
|
|
|
|
static void early_panic(char *msg)
|
|
|
|
{
|
|
|
|
early_printk(msg);
|
|
|
|
panic(msg);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* "mem=nopentium" disables the 4MB page tables. */
|
|
|
|
static int __init parse_memopt(char *p)
|
|
|
|
{
|
|
|
|
u64 mem_size;
|
|
|
|
|
|
|
|
if (!p)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
#ifdef CONFIG_X86_32
|
|
|
|
if (!strcmp(p, "nopentium")) {
|
|
|
|
setup_clear_cpu_cap(X86_FEATURE_PSE);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
mem_size = memparse(p, &p);
|
|
|
|
end_user_pfn = mem_size>>PAGE_SHIFT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
early_param("mem", parse_memopt);
|
|
|
|
|
|
|
|
static int userdef __initdata;
|
|
|
|
|
|
|
|
static int __init parse_memmap_opt(char *p)
|
|
|
|
{
|
|
|
|
char *oldp;
|
|
|
|
u64 start_at, mem_size;
|
|
|
|
|
|
|
|
if (!strcmp(p, "exactmap")) {
|
|
|
|
#ifdef CONFIG_CRASH_DUMP
|
|
|
|
/*
|
|
|
|
* If we are doing a crash dump, we still need to know
|
|
|
|
* the real mem size before original memory map is
|
|
|
|
* reset.
|
|
|
|
*/
|
|
|
|
e820_register_active_regions(0, 0, -1UL);
|
|
|
|
saved_max_pfn = e820_end_of_ram();
|
|
|
|
remove_all_active_ranges();
|
|
|
|
#endif
|
|
|
|
e820.nr_map = 0;
|
|
|
|
userdef = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
oldp = p;
|
|
|
|
mem_size = memparse(p, &p);
|
|
|
|
if (p == oldp)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
userdef = 1;
|
|
|
|
if (*p == '@') {
|
|
|
|
start_at = memparse(p+1, &p);
|
2008-06-16 01:58:51 +00:00
|
|
|
e820_add_region(start_at, mem_size, E820_RAM);
|
2008-06-10 19:55:54 +00:00
|
|
|
} else if (*p == '#') {
|
|
|
|
start_at = memparse(p+1, &p);
|
2008-06-16 01:58:51 +00:00
|
|
|
e820_add_region(start_at, mem_size, E820_ACPI);
|
2008-06-10 19:55:54 +00:00
|
|
|
} else if (*p == '$') {
|
|
|
|
start_at = memparse(p+1, &p);
|
2008-06-16 01:58:51 +00:00
|
|
|
e820_add_region(start_at, mem_size, E820_RESERVED);
|
2008-06-10 19:55:54 +00:00
|
|
|
} else {
|
|
|
|
end_user_pfn = (mem_size >> PAGE_SHIFT);
|
|
|
|
}
|
|
|
|
return *p == '\0' ? 0 : -EINVAL;
|
|
|
|
}
|
|
|
|
early_param("memmap", parse_memmap_opt);
|
|
|
|
|
|
|
|
void __init finish_e820_parsing(void)
|
|
|
|
{
|
|
|
|
if (userdef) {
|
|
|
|
int nr = e820.nr_map;
|
|
|
|
|
|
|
|
if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &nr) < 0)
|
|
|
|
early_panic("Invalid user supplied memory map");
|
|
|
|
e820.nr_map = nr;
|
|
|
|
|
|
|
|
printk(KERN_INFO "user-defined physical RAM map:\n");
|
|
|
|
e820_print_map("user");
|
|
|
|
}
|
|
|
|
}
|
2008-06-16 20:03:31 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Mark e820 reserved areas as busy for the resource manager.
|
|
|
|
*/
|
|
|
|
void __init e820_reserve_resources(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct resource *res;
|
|
|
|
|
|
|
|
res = alloc_bootmem_low(sizeof(struct resource) * e820.nr_map);
|
|
|
|
for (i = 0; i < e820.nr_map; i++) {
|
|
|
|
switch (e820.map[i].type) {
|
|
|
|
case E820_RAM: res->name = "System RAM"; break;
|
|
|
|
case E820_ACPI: res->name = "ACPI Tables"; break;
|
|
|
|
case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
|
|
|
|
default: res->name = "reserved";
|
|
|
|
}
|
|
|
|
res->start = e820.map[i].addr;
|
|
|
|
res->end = res->start + e820.map[i].size - 1;
|
|
|
|
#ifndef CONFIG_RESOURCES_64BIT
|
|
|
|
if (res->end > 0x100000000ULL) {
|
|
|
|
res++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
|
|
|
|
insert_resource(&iomem_resource, res);
|
|
|
|
res++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-06-17 02:58:28 +00:00
|
|
|
char *__init __attribute__((weak)) machine_specific_memory_setup(void)
|
|
|
|
{
|
|
|
|
char *who = "BIOS-e820";
|
|
|
|
int new_nr;
|
|
|
|
/*
|
|
|
|
* Try to copy the BIOS-supplied E820-map.
|
|
|
|
*
|
|
|
|
* Otherwise fake a memory map; one section from 0k->640k,
|
|
|
|
* the next section from 1mb->appropriate_mem_k
|
|
|
|
*/
|
|
|
|
new_nr = boot_params.e820_entries;
|
|
|
|
sanitize_e820_map(boot_params.e820_map,
|
|
|
|
ARRAY_SIZE(boot_params.e820_map),
|
|
|
|
&new_nr);
|
|
|
|
boot_params.e820_entries = new_nr;
|
|
|
|
if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries) < 0) {
|
|
|
|
#ifdef CONFIG_X86_64
|
|
|
|
early_panic("Cannot find a valid memory map");
|
|
|
|
#else
|
|
|
|
unsigned long mem_size;
|
|
|
|
|
|
|
|
/* compare results from other methods and take the greater */
|
|
|
|
if (boot_params.alt_mem_k
|
|
|
|
< boot_params.screen_info.ext_mem_k) {
|
|
|
|
mem_size = boot_params.screen_info.ext_mem_k;
|
|
|
|
who = "BIOS-88";
|
|
|
|
} else {
|
|
|
|
mem_size = boot_params.alt_mem_k;
|
|
|
|
who = "BIOS-e801";
|
|
|
|
}
|
|
|
|
|
|
|
|
e820.nr_map = 0;
|
|
|
|
e820_add_region(0, LOWMEMSIZE(), E820_RAM);
|
|
|
|
e820_add_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/* In case someone cares... */
|
|
|
|
return who;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Overridden in paravirt.c if CONFIG_PARAVIRT */
|
|
|
|
char * __init __attribute__((weak)) memory_setup(void)
|
|
|
|
{
|
|
|
|
return machine_specific_memory_setup();
|
|
|
|
}
|
|
|
|
|
|
|
|
void __init setup_memory_map(void)
|
|
|
|
{
|
|
|
|
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
|
|
|
|
e820_print_map(memory_setup());
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_X86_64
|
|
|
|
int __init arch_get_ram_range(int slot, u64 *addr, u64 *size)
|
|
|
|
{
|
|
|
|
int i;
|
2008-06-16 20:03:31 +00:00
|
|
|
|
2008-06-17 02:58:28 +00:00
|
|
|
if (slot < 0 || slot >= e820.nr_map)
|
|
|
|
return -1;
|
|
|
|
for (i = slot; i < e820.nr_map; i++) {
|
|
|
|
if (e820.map[i].type != E820_RAM)
|
|
|
|
continue;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (i == e820.nr_map || e820.map[i].addr > (max_pfn << PAGE_SHIFT))
|
|
|
|
return -1;
|
|
|
|
*addr = e820.map[i].addr;
|
|
|
|
*size = min_t(u64, e820.map[i].size + e820.map[i].addr,
|
|
|
|
max_pfn << PAGE_SHIFT) - *addr;
|
|
|
|
return i + 1;
|
|
|
|
}
|
|
|
|
#endif
|