Commit ba5b14cc authored by Yinghai Lu's avatar Yinghai Lu Committed by Thomas Gleixner
Browse files

x86: extend e820 ealy_res support 32bit - fix 



use find_e820_area to find addess for new RAMDISK, instead of using ram blindly

also print out low ram and bootmap info

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent a4c81cf6

arch/x86/kernel/setup_32.c

+31 −24
Original line number Diff line number Diff line
@@ -466,11 +466,11 @@ static bool do_relocate_initrd = false; 


static void __init reserve_initrd(void)

{

	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;

	unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;

	unsigned long ramdisk_here;

	u64 ramdisk_image = boot_params.hdr.ramdisk_image;

	u64 ramdisk_size  = boot_params.hdr.ramdisk_size;

	u64 ramdisk_end   = ramdisk_image + ramdisk_size;

	u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;

	u64 ramdisk_here;



	if (!boot_params.hdr.type_of_loader ||

	    !ramdisk_image || !ramdisk_size)
@@ -478,14 +478,8 @@ static void __init reserve_initrd(void) 


	initrd_start = 0;



	if (ramdisk_end < ramdisk_image) {

		free_bootmem(ramdisk_image, ramdisk_size);

		printk(KERN_ERR "initrd wraps around end of memory, "

		       "disabling initrd\n");

		return;

	}

	if (ramdisk_size >= end_of_lowmem/2) {

		free_bootmem(ramdisk_image, ramdisk_size);

		free_early(ramdisk_image, ramdisk_image + ramdisk_size - 1);

		printk(KERN_ERR "initrd too large to handle, "

		       "disabling initrd\n");

		return;
@@ -495,8 +489,7 @@ static void __init reserve_initrd(void) 
		/* All in lowmem, easy case */

		/*

		 * don't need to reserve again, already reserved early

		 * in i386_start_kernel, and early_res_to_bootmem

		 * convert that to reserved in bootmem

		 * in i386_start_kernel

		 */

		initrd_start = ramdisk_image + PAGE_OFFSET;

		initrd_end = initrd_start+ramdisk_size;
@@ -504,11 +497,14 @@ static void __init reserve_initrd(void) 
	}



	/* We need to move the initrd down into lowmem */

	ramdisk_here = (end_of_lowmem - ramdisk_size) & PAGE_MASK;

	ramdisk_here = find_e820_area(min_low_pfn<<PAGE_SHIFT,

				 end_of_lowmem, ramdisk_size,

				 PAGE_SIZE);



	/* Note: this includes all the lowmem currently occupied by

	   the initrd, we rely on that fact to keep the data intact. */

	reserve_bootmem(ramdisk_here, ramdisk_size, BOOTMEM_DEFAULT);

	reserve_early(ramdisk_here, ramdisk_here + ramdisk_size - 1,

			 "NEW RAMDISK");

	initrd_start = ramdisk_here + PAGE_OFFSET;

	initrd_end   = initrd_start + ramdisk_size;
@@ -519,10 +515,10 @@ static void __init reserve_initrd(void) 


static void __init relocate_initrd(void)

{

	unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;

	unsigned long ramdisk_size  = boot_params.hdr.ramdisk_size;

	unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;

	unsigned long ramdisk_here;

	u64 ramdisk_image = boot_params.hdr.ramdisk_image;

	u64 ramdisk_size  = boot_params.hdr.ramdisk_size;

	u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;

	u64 ramdisk_here;

	unsigned long slop, clen, mapaddr;

	char *p, *q;
@@ -540,6 +536,8 @@ static void __init relocate_initrd(void) 
		memcpy(q, p, clen);

		q += clen;

		/* need to free these low pages...*/

		printk(KERN_INFO "Freeing old partial RAMDISK %08llx-%08llx\n",

			 ramdisk_image, ramdisk_image + clen - 1);

		free_bootmem(ramdisk_image, clen);

		ramdisk_image += clen;

		ramdisk_size  -= clen;
@@ -560,6 +558,11 @@ static void __init relocate_initrd(void) 
		ramdisk_size  -= clen;

	}

	/* high pages is not converted by early_res_to_bootmem */

	ramdisk_image = boot_params.hdr.ramdisk_image;

	ramdisk_size  = boot_params.hdr.ramdisk_size;

	printk(KERN_INFO "Copied RAMDISK from %016llx - %016llx to %08llx - %08llx\n",

		ramdisk_image, ramdisk_image + ramdisk_size - 1,

		ramdisk_here, ramdisk_here + ramdisk_size - 1);

}



#endif /* CONFIG_BLK_DEV_INITRD */
@@ -576,10 +579,17 @@ void __init setup_bootmem_allocator(void) 
				 PAGE_SIZE);

	if (bootmap == -1L)

		panic("Cannot find bootmem map of size %ld\n", bootmap_size);

	reserve_early(bootmap, bootmap + bootmap_size - 1, "BOOTMAP");

#ifdef CONFIG_BLK_DEV_INITRD

	reserve_initrd();

#endif

	bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn);

	printk(KERN_INFO "  low ram: %08lx - %08lx\n",

		 min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);

	printk(KERN_INFO "  bootmap [%08lx -  %08lx]\n",

		 bootmap, bootmap + bootmap_size - 1);

	register_bootmem_low_pages(max_low_pfn);

	early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);

	reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);



#ifdef CONFIG_ACPI_SLEEP

	/*
@@ -592,9 +602,6 @@ void __init setup_bootmem_allocator(void) 
	 * Find and reserve possible boot-time SMP configuration:

	 */

	find_smp_config();

#endif

#ifdef CONFIG_BLK_DEV_INITRD

	reserve_initrd();

#endif

	numa_kva_reserve();

	reserve_crashkernel();

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