* PFN of last memory page.
*/
unsigned long end_pfn;
-EXPORT_SYMBOL(end_pfn);
/*
* end_pfn only includes RAM, while end_pfn_map includes all e820 entries.
*/
static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
-extern struct resource code_resource, data_resource, bss_resource;
+/*
+ * Early reserved memory areas.
+ */
+#define MAX_EARLY_RES 20
+
+struct early_res {
+ unsigned long start, end;
+ char name[16];
+};
+static struct early_res early_res[MAX_EARLY_RES] __initdata = {
+ { 0, PAGE_SIZE, "BIOS data page" }, /* BIOS data page */
+#ifdef CONFIG_SMP
+ { SMP_TRAMPOLINE_BASE, SMP_TRAMPOLINE_BASE + 2*PAGE_SIZE, "SMP_TRAMPOLINE" },
+#endif
+ {}
+};
-/* Check for some hardcoded bad areas that early boot is not allowed to touch */
-static inline int bad_addr(unsigned long *addrp, unsigned long size)
+void __init reserve_early(unsigned long start, unsigned long end, char *name)
{
- unsigned long addr = *addrp, last = addr + size;
-
- /* various gunk below that needed for SMP startup */
- if (addr < 0x8000) {
- *addrp = PAGE_ALIGN(0x8000);
- return 1;
+ int i;
+ struct early_res *r;
+ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+ r = &early_res[i];
+ if (end > r->start && start < r->end)
+ panic("Overlapping early reservations %lx-%lx %s to %lx-%lx %s\n",
+ start, end - 1, name?name:"", r->start, r->end - 1, r->name);
}
+ if (i >= MAX_EARLY_RES)
+ panic("Too many early reservations");
+ r = &early_res[i];
+ r->start = start;
+ r->end = end;
+ if (name)
+ strncpy(r->name, name, sizeof(r->name) - 1);
+}
- /* direct mapping tables of the kernel */
- if (last >= table_start<<PAGE_SHIFT && addr < table_end<<PAGE_SHIFT) {
- *addrp = PAGE_ALIGN(table_end << PAGE_SHIFT);
- return 1;
+void __init early_res_to_bootmem(void)
+{
+ int i;
+ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+ struct early_res *r = &early_res[i];
+ printk(KERN_INFO "early res: %d [%lx-%lx] %s\n", i,
+ r->start, r->end - 1, r->name);
+ reserve_bootmem_generic(r->start, r->end - r->start);
}
+}
- /* initrd */
-#ifdef CONFIG_BLK_DEV_INITRD
- if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
- unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
- unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
- unsigned long ramdisk_end = ramdisk_image+ramdisk_size;
-
- if (last >= ramdisk_image && addr < ramdisk_end) {
- *addrp = PAGE_ALIGN(ramdisk_end);
- return 1;
+/* Check for already reserved areas */
+static inline int bad_addr(unsigned long *addrp, unsigned long size)
+{
+ int i;
+ unsigned long addr = *addrp, last;
+ 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->end) {
+ *addrp = addr = r->end;
+ changed = 1;
+ goto again;
}
}
-#endif
- /* kernel code */
- if (last >= __pa_symbol(&_text) && addr < __pa_symbol(&_end)) {
- *addrp = PAGE_ALIGN(__pa_symbol(&_end));
- return 1;
- }
-
- if (last >= ebda_addr && addr < ebda_addr + ebda_size) {
- *addrp = PAGE_ALIGN(ebda_addr + ebda_size);
- return 1;
- }
-
-#ifdef CONFIG_NUMA
- /* NUMA memory to node map */
- if (last >= nodemap_addr && addr < nodemap_addr + nodemap_size) {
- *addrp = nodemap_addr + nodemap_size;
- return 1;
- }
-#endif
- /* XXX ramdisk image here? */
- return 0;
+ return changed;
}
/*
}
/*
- * Find a free area in a specific range.
+ * Find a free area with specified alignment in a specific range.
*/
unsigned long __init find_e820_area(unsigned long start, unsigned long end,
- unsigned size)
+ unsigned size, unsigned long align)
{
int i;
+ unsigned long mask = ~(align - 1);
for (i = 0; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
continue;
while (bad_addr(&addr, size) && addr+size <= ei->addr+ei->size)
;
- last = PAGE_ALIGN(addr) + size;
+ addr = (addr + align - 1) & mask;
+ last = addr + size;
if (last > ei->addr + ei->size)
continue;
if (last > end)
/*
* Mark e820 reserved areas as busy for the resource manager.
*/
-void __init e820_reserve_resources(void)
+void __init e820_reserve_resources(struct resource *code_resource,
+ struct resource *data_resource, struct resource *bss_resource)
{
int i;
for (i = 0; i < e820.nr_map; i++) {
* so we try it repeatedly and let the resource manager
* test it.
*/
- request_resource(res, &code_resource);
- request_resource(res, &data_resource);
- request_resource(res, &bss_resource);
+ request_resource(res, code_resource);
+ request_resource(res, data_resource);
+ request_resource(res, bss_resource);
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end)
request_resource(res, &crashk_res);
return end - start - (ram << PAGE_SHIFT);
}
-void __init e820_print_map(char *who)
+static void __init e820_print_map(char *who)
{
int i;
return 0;
}
-void early_panic(char *msg)
+static void early_panic(char *msg)
{
early_printk(msg);
panic(msg);
}
-void __init setup_memory_region(void)
+/* We're not void only for x86 32-bit compat */
+char * __init machine_specific_memory_setup(void)
{
+ char *who = "BIOS-e820";
/*
* Try to copy the BIOS-supplied E820-map.
*
if (copy_e820_map(boot_params.e820_map, boot_params.e820_entries) < 0)
early_panic("Cannot find a valid memory map");
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
- e820_print_map("BIOS-e820");
+ e820_print_map(who);
+
+ /* In case someone cares... */
+ return who;
}
static int __init parse_memopt(char *p)
mem_size = memparse(p, &p);
if (p == oldp)
return -EINVAL;
+
+ userdef = 1;
if (*p == '@') {
start_at = memparse(p+1, &p);
add_memory_region(start_at, mem_size, E820_RAM);
void __init finish_e820_parsing(void)
{
if (userdef) {
+ char nr = e820.nr_map;
+
+ if (sanitize_e820_map(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");
}
}
+void __init update_e820(void)
+{
+ u8 nr_map;
+
+ nr_map = e820.nr_map;
+ if (sanitize_e820_map(e820.map, &nr_map))
+ return;
+ e820.nr_map = nr_map;
+ printk(KERN_INFO "modified physical RAM map:\n");
+ e820_print_map("modified");
+}
+
unsigned long pci_mem_start = 0xaeedbabe;
EXPORT_SYMBOL(pci_mem_start);
projects / linux-2.6 / blobdiff