x86: clean up arch/x86/kernel/e820_64.c
White space and coding style cleanup. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
Ingo Molnar
parent
05fccb0e38
commit
2f36fa13ce
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@ -1,4 +1,4 @@
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/*
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/*
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* Handle the memory map.
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* The functions here do the job until bootmem takes over.
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*
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@ -29,44 +29,44 @@
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struct e820map e820;
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/*
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/*
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* PFN of last memory page.
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*/
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unsigned long end_pfn;
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unsigned long end_pfn;
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EXPORT_SYMBOL(end_pfn);
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/*
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/*
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* end_pfn only includes RAM, while end_pfn_map includes all e820 entries.
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* The direct mapping extends to end_pfn_map, so that we can directly access
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* apertures, ACPI and other tables without having to play with fixmaps.
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*/
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unsigned long end_pfn_map;
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*/
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unsigned long end_pfn_map;
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/*
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/*
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* Last pfn which the user wants to use.
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*/
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static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT;
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extern struct resource code_resource, data_resource, bss_resource;
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/* Check for some hardcoded bad areas that early boot is not allowed to touch */
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/* Check for some hardcoded bad areas that early boot is not allowed to touch */
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static inline int bad_addr(unsigned long *addrp, unsigned long size)
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{
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unsigned long addr = *addrp, last = addr + size;
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{
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unsigned long addr = *addrp, last = addr + size;
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/* various gunk below that needed for SMP startup */
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if (addr < 0x8000) {
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if (addr < 0x8000) {
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*addrp = PAGE_ALIGN(0x8000);
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return 1;
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return 1;
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}
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/* direct mapping tables of the kernel */
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if (last >= table_start<<PAGE_SHIFT && addr < table_end<<PAGE_SHIFT) {
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if (last >= table_start<<PAGE_SHIFT && addr < table_end<<PAGE_SHIFT) {
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*addrp = PAGE_ALIGN(table_end << PAGE_SHIFT);
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return 1;
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}
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}
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/* initrd */
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/* initrd */
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#ifdef CONFIG_BLK_DEV_INITRD
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if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
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unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
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@ -77,7 +77,7 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size)
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*addrp = PAGE_ALIGN(ramdisk_end);
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return 1;
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}
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}
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}
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#endif
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/* kernel code */
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if (last >= __pa_symbol(&_text) && addr < __pa_symbol(&_end)) {
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@ -97,9 +97,9 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size)
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return 1;
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}
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#endif
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/* XXX ramdisk image here? */
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/* XXX ramdisk image here? */
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return 0;
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}
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}
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/*
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* This function checks if any part of the range <start,end> is mapped
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@ -107,16 +107,18 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size)
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*/
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int
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e820_any_mapped(unsigned long start, unsigned long end, unsigned type)
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{
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{
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int i;
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for (i = 0; i < e820.nr_map; i++) {
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struct e820entry *ei = &e820.map[i];
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if (type && ei->type != type)
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for (i = 0; i < e820.nr_map; i++) {
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struct e820entry *ei = &e820.map[i];
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if (type && ei->type != type)
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continue;
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if (ei->addr >= end || ei->addr + ei->size <= start)
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continue;
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return 1;
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}
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continue;
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return 1;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(e820_any_mapped);
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@ -127,11 +129,14 @@ EXPORT_SYMBOL_GPL(e820_any_mapped);
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* Note: this function only works correct if the e820 table is sorted and
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* not-overlapping, which is the case
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*/
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int __init e820_all_mapped(unsigned long start, unsigned long end, unsigned type)
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int __init e820_all_mapped(unsigned long start, unsigned long end,
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unsigned type)
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{
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int i;
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for (i = 0; i < e820.nr_map; i++) {
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struct e820entry *ei = &e820.map[i];
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if (type && ei->type != type)
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continue;
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/* is the region (part) in overlap with the current region ?*/
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@ -143,59 +148,66 @@ int __init e820_all_mapped(unsigned long start, unsigned long end, unsigned type
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*/
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if (ei->addr <= start)
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start = ei->addr + ei->size;
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/* if start is now at or beyond end, we're done, full coverage */
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/*
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* if start is now at or beyond end, we're done, full
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* coverage
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*/
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if (start >= end)
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return 1; /* we're done */
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return 1;
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}
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return 0;
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}
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/*
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* Find a free area in a specific range.
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*/
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unsigned long __init find_e820_area(unsigned long start, unsigned long end, unsigned size)
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{
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int i;
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for (i = 0; i < e820.nr_map; i++) {
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struct e820entry *ei = &e820.map[i];
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unsigned long addr = ei->addr, last;
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if (ei->type != E820_RAM)
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continue;
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if (addr < start)
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/*
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* Find a free area in a specific range.
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*/
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unsigned long __init find_e820_area(unsigned long start, unsigned long end,
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unsigned size)
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{
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int i;
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for (i = 0; i < e820.nr_map; i++) {
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struct e820entry *ei = &e820.map[i];
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unsigned long addr = ei->addr, last;
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if (ei->type != E820_RAM)
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continue;
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if (addr < start)
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addr = start;
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if (addr > ei->addr + ei->size)
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continue;
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if (addr > ei->addr + ei->size)
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continue;
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while (bad_addr(&addr, size) && addr+size <= ei->addr+ei->size)
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;
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last = PAGE_ALIGN(addr) + size;
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if (last > ei->addr + ei->size)
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continue;
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if (last > end)
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if (last > end)
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continue;
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return addr;
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}
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return -1UL;
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}
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return addr;
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}
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return -1UL;
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}
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/*
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* Find the highest page frame number we have available
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*/
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unsigned long __init e820_end_of_ram(void)
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{
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unsigned long end_pfn = 0;
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unsigned long end_pfn;
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end_pfn = find_max_pfn_with_active_regions();
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if (end_pfn > end_pfn_map)
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if (end_pfn > end_pfn_map)
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end_pfn_map = end_pfn;
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if (end_pfn_map > MAXMEM>>PAGE_SHIFT)
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end_pfn_map = MAXMEM>>PAGE_SHIFT;
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if (end_pfn > end_user_pfn)
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end_pfn = end_user_pfn;
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if (end_pfn > end_pfn_map)
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end_pfn = end_pfn_map;
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if (end_pfn > end_pfn_map)
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end_pfn = end_pfn_map;
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printk("end_pfn_map = %lu\n", end_pfn_map);
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return end_pfn;
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printk(KERN_INFO "end_pfn_map = %lu\n", end_pfn_map);
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return end_pfn;
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}
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/*
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@ -219,9 +231,9 @@ void __init e820_reserve_resources(void)
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request_resource(&iomem_resource, res);
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if (e820.map[i].type == E820_RAM) {
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/*
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* We don't know which RAM region contains kernel data,
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* so we try it repeatedly and let the resource manager
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* test it.
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* We don't know which RAM region contains kernel data,
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* so we try it repeatedly and let the resource manager
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* test it.
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*/
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request_resource(res, &code_resource);
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request_resource(res, &data_resource);
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@ -322,9 +334,9 @@ e820_register_active_regions(int nid, unsigned long start_pfn,
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add_active_range(nid, ei_startpfn, ei_endpfn);
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}
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/*
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/*
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* Add a memory region to the kernel e820 map.
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*/
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*/
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void __init add_memory_region(unsigned long start, unsigned long size, int type)
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{
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int x = e820.nr_map;
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@ -349,9 +361,7 @@ unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
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{
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unsigned long start_pfn = start >> PAGE_SHIFT;
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unsigned long end_pfn = end >> PAGE_SHIFT;
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unsigned long ei_startpfn;
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unsigned long ei_endpfn;
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unsigned long ram = 0;
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unsigned long ei_startpfn, ei_endpfn, ram = 0;
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int i;
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for (i = 0; i < e820.nr_map; i++) {
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@ -369,22 +379,25 @@ void __init e820_print_map(char *who)
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for (i = 0; i < e820.nr_map; i++) {
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printk(KERN_INFO " %s: %016Lx - %016Lx ", who,
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(unsigned long long) e820.map[i].addr,
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(unsigned long long) (e820.map[i].addr + e820.map[i].size));
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(unsigned long long) e820.map[i].addr,
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(unsigned long long)
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(e820.map[i].addr + e820.map[i].size));
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switch (e820.map[i].type) {
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case E820_RAM: printk("(usable)\n");
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break;
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case E820_RAM:
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printk(KERN_CONT "(usable)\n");
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break;
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case E820_RESERVED:
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printk("(reserved)\n");
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break;
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printk(KERN_CONT "(reserved)\n");
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break;
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case E820_ACPI:
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printk("(ACPI data)\n");
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break;
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printk(KERN_CONT "(ACPI data)\n");
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break;
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case E820_NVS:
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printk("(ACPI NVS)\n");
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break;
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default: printk("type %u\n", e820.map[i].type);
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break;
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printk(KERN_CONT "(ACPI NVS)\n");
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break;
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default:
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printk(KERN_CONT "type %u\n", e820.map[i].type);
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break;
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}
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}
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}
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@ -392,11 +405,11 @@ void __init e820_print_map(char *who)
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/*
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* Sanitize the BIOS e820 map.
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*
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* Some e820 responses include overlapping entries. The following
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* Some e820 responses include overlapping entries. The following
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* replaces the original e820 map with a new one, removing overlaps.
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*
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*/
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static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
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static int __init sanitize_e820_map(struct e820entry *biosmap, char *pnr_map)
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{
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struct change_member {
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struct e820entry *pbios; /* pointer to original bios entry */
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@ -416,7 +429,8 @@ static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
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int i;
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/*
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Visually we're performing the following (1,2,3,4 = memory types)...
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Visually we're performing the following
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(1,2,3,4 = memory types)...
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Sample memory map (w/overlaps):
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____22__________________
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@ -458,22 +472,23 @@ static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
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old_nr = *pnr_map;
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/* bail out if we find any unreasonable addresses in bios map */
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for (i=0; i<old_nr; i++)
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for (i = 0; i < old_nr; i++)
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if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
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return -1;
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/* create pointers for initial change-point information (for sorting) */
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for (i=0; i < 2*old_nr; i++)
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for (i = 0; i < 2 * old_nr; i++)
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change_point[i] = &change_point_list[i];
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/* record all known change-points (starting and ending addresses),
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omitting those that are for empty memory regions */
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chgidx = 0;
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for (i=0; i < old_nr; i++) {
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for (i = 0; i < old_nr; i++) {
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if (biosmap[i].size != 0) {
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change_point[chgidx]->addr = biosmap[i].addr;
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change_point[chgidx++]->pbios = &biosmap[i];
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change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
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change_point[chgidx]->addr = biosmap[i].addr +
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biosmap[i].size;
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change_point[chgidx++]->pbios = &biosmap[i];
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}
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}
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@ -483,75 +498,106 @@ static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
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still_changing = 1;
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while (still_changing) {
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still_changing = 0;
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for (i=1; i < chg_nr; i++) {
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/* if <current_addr> > <last_addr>, swap */
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/* or, if current=<start_addr> & last=<end_addr>, swap */
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if ((change_point[i]->addr < change_point[i-1]->addr) ||
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((change_point[i]->addr == change_point[i-1]->addr) &&
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(change_point[i]->addr == change_point[i]->pbios->addr) &&
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(change_point[i-1]->addr != change_point[i-1]->pbios->addr))
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)
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{
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for (i = 1; i < chg_nr; i++) {
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unsigned long long curaddr, lastaddr;
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unsigned long long curpbaddr, lastpbaddr;
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curaddr = change_point[i]->addr;
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lastaddr = change_point[i - 1]->addr;
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curpbaddr = change_point[i]->pbios->addr;
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lastpbaddr = change_point[i - 1]->pbios->addr;
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/*
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* swap entries, when:
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*
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* curaddr > lastaddr or
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* curaddr == lastaddr and curaddr == curpbaddr and
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* lastaddr != lastpbaddr
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*/
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if (curaddr < lastaddr ||
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(curaddr == lastaddr && curaddr == curpbaddr &&
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lastaddr != lastpbaddr)) {
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change_tmp = change_point[i];
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change_point[i] = change_point[i-1];
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change_point[i-1] = change_tmp;
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still_changing=1;
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still_changing = 1;
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}
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}
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}
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/* create a new bios memory map, removing overlaps */
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overlap_entries=0; /* number of entries in the overlap table */
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new_bios_entry=0; /* index for creating new bios map entries */
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overlap_entries = 0; /* number of entries in the overlap table */
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new_bios_entry = 0; /* index for creating new bios map entries */
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last_type = 0; /* start with undefined memory type */
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last_addr = 0; /* start with 0 as last starting address */
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/* loop through change-points, determining affect on the new bios map */
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for (chgidx=0; chgidx < chg_nr; chgidx++)
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{
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for (chgidx = 0; chgidx < chg_nr; chgidx++) {
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/* keep track of all overlapping bios entries */
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if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr)
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{
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/* add map entry to overlap list (> 1 entry implies an overlap) */
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overlap_list[overlap_entries++]=change_point[chgidx]->pbios;
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}
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else
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{
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/* remove entry from list (order independent, so swap with last) */
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for (i=0; i<overlap_entries; i++)
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{
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if (overlap_list[i] == change_point[chgidx]->pbios)
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overlap_list[i] = overlap_list[overlap_entries-1];
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if (change_point[chgidx]->addr ==
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change_point[chgidx]->pbios->addr) {
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/*
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* add map entry to overlap list (> 1 entry
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* implies an overlap)
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*/
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overlap_list[overlap_entries++] =
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change_point[chgidx]->pbios;
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} else {
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/*
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* remove entry from list (order independent,
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* so swap with last)
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*/
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for (i = 0; i < overlap_entries; i++) {
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if (overlap_list[i] ==
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change_point[chgidx]->pbios)
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overlap_list[i] =
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overlap_list[overlap_entries-1];
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}
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overlap_entries--;
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}
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/* if there are overlapping entries, decide which "type" to use */
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/* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
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/*
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* if there are overlapping entries, decide which
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* "type" to use (larger value takes precedence --
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* 1=usable, 2,3,4,4+=unusable)
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*/
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current_type = 0;
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for (i=0; i<overlap_entries; i++)
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for (i = 0; i < overlap_entries; i++)
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if (overlap_list[i]->type > current_type)
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current_type = overlap_list[i]->type;
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/* continue building up new bios map based on this information */
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/*
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* continue building up new bios map based on this
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* 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 */
|
||||
/*
|
||||
* 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 ?
|
||||
*/
|
||||
if (++new_bios_entry >= E820MAX)
|
||||
break; /* no more space left for new bios entries */
|
||||
break;
|
||||
}
|
||||
if (current_type != 0) {
|
||||
new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
|
||||
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_addr = change_point[chgidx]->addr;
|
||||
}
|
||||
last_type = current_type;
|
||||
}
|
||||
}
|
||||
new_nr = new_bios_entry; /* retain count for new bios entries */
|
||||
/* 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));
|
||||
memcpy(biosmap, new_bios, new_nr * sizeof(struct e820entry));
|
||||
*pnr_map = new_nr;
|
||||
|
||||
return 0;
|
||||
|
|
@ -566,7 +612,7 @@ static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
|
|||
* 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.
|
||||
*/
|
||||
static int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
|
||||
static int __init copy_e820_map(struct e820entry *biosmap, int nr_map)
|
||||
{
|
||||
/* Only one memory region (or negative)? Ignore it */
|
||||
if (nr_map < 2)
|
||||
|
|
@ -583,7 +629,7 @@ static int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
|
|||
return -1;
|
||||
|
||||
add_memory_region(start, size, type);
|
||||
} while (biosmap++,--nr_map);
|
||||
} while (biosmap++, --nr_map);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -613,9 +659,9 @@ static int __init parse_memopt(char *p)
|
|||
if (!p)
|
||||
return -EINVAL;
|
||||
end_user_pfn = memparse(p, &p);
|
||||
end_user_pfn >>= PAGE_SHIFT;
|
||||
end_user_pfn >>= PAGE_SHIFT;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
early_param("mem", parse_memopt);
|
||||
|
||||
static int userdef __initdata;
|
||||
|
|
@ -627,9 +673,9 @@ static int __init parse_memmap_opt(char *p)
|
|||
|
||||
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
|
||||
/*
|
||||
* 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);
|
||||
|
|
@ -713,8 +759,10 @@ __init void e820_setup_gap(void)
|
|||
|
||||
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");
|
||||
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");
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -727,8 +775,9 @@ __init void e820_setup_gap(void)
|
|||
/* 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);
|
||||
printk(KERN_INFO
|
||||
"Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
|
||||
pci_mem_start, gapstart, gapsize);
|
||||
}
|
||||
|
||||
int __init arch_get_ram_range(int slot, u64 *addr, u64 *size)
|
||||
|
|
|
|||
Loading…
Reference in New Issue