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

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index fed482c624503045629e06477071f4cb5fd4130a..3c451d143ebab6e872eb14793a2cd99a8a942bd9 100644 (file)
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -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();