x86: extend e820 ealy_res support 32bit

move early_res related from e820_64.c to e820.c
make edba detection to be done in head32.c
remove smp_alloc_memory, because we have fixed trampoline address now.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

 arch/x86/kernel/e820.c              |  214 ++++++++++++++++++++++++++++++++++++
 arch/x86/kernel/e820_64.c           |  196 --------------------------------
 arch/x86/kernel/head32.c            |   76 ++++++++++++
 arch/x86/kernel/setup_32.c          |  109 +++---------------
 arch/x86/kernel/smpboot.c           |   17 --
 arch/x86/kernel/trampoline.c        |    2
 arch/x86/mach-voyager/voyager_smp.c |    9 -
 include/asm-x86/e820.h              |    6 +
 include/asm-x86/e820_64.h           |    9 -
 include/asm-x86/smp.h               |    1
 arch/x86/kernel/e820.c              |  214 ++++++++++++++++++++++++++++++++++++
 arch/x86/kernel/e820_64.c           |  196 --------------------------------
 arch/x86/kernel/head32.c            |   76 ++++++++++++
 arch/x86/kernel/setup_32.c          |  109 +++---------------
 arch/x86/kernel/smpboot.c           |   17 --
 arch/x86/kernel/trampoline.c        |    2
 arch/x86/mach-voyager/voyager_smp.c |    9 -
 include/asm-x86/e820.h              |    6 +
 include/asm-x86/e820_64.h           |    9 -
 include/asm-x86/smp.h               |    1
 arch/x86/kernel/e820.c              |  214 ++++++++++++++++++++++++++++++++++++
 arch/x86/kernel/e820_64.c           |  196 --------------------------------
 arch/x86/kernel/head32.c            |   76 ++++++++++++
 arch/x86/kernel/setup_32.c          |  109 +++---------------
 arch/x86/kernel/smpboot.c           |   17 --
 arch/x86/kernel/trampoline.c        |    2
 arch/x86/mach-voyager/voyager_smp.c |    9 -
 include/asm-x86/e820.h              |    6 +
 include/asm-x86/e820_64.h           |    9 -
 include/asm-x86/smp.h               |    1
 10 files changed, 320 insertions(+), 319 deletions(-)

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 23 insertions, 86 deletions

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 5faeab69edd9..fed482c62450 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -359,56 +359,6 @@ unsigned long __init find_max_low_pfn(void)
         return max_low_pfn;
 }
 
-#define BIOS_LOWMEM_KILOBYTES 0x413
-
-/*
- * The BIOS places the EBDA/XBDA at the top of conventional
- * memory, and usually decreases the reported amount of
- * conventional memory (int 0x12) too. This also contains a
- * workaround for Dell systems that neglect to reserve EBDA.
- * The same workaround also avoids a problem with the AMD768MPX
- * chipset: reserve a page before VGA to prevent PCI prefetch
- * into it (errata #56). Usually the page is reserved anyways,
- * unless you have no PS/2 mouse plugged in.
- */
-static void __init reserve_ebda_region(void)
-{
-        unsigned int lowmem, ebda_addr;
-
-        /* To determine the position of the EBDA and the */
-        /* end of conventional memory, we need to look at */
-        /* the BIOS data area. In a paravirtual environment */
-        /* that area is absent. We'll just have to assume */
-        /* that the paravirt case can handle memory setup */
-        /* correctly, without our help. */
-        if (paravirt_enabled())
-                return;
-
-        /* end of low (conventional) memory */
-        lowmem = *(unsigned short *)__va(BIOS_LOWMEM_KILOBYTES);
-        lowmem <<= 10;
-
-        /* start of EBDA area */
-        ebda_addr = get_bios_ebda();
-
-        /* Fixup: bios puts an EBDA in the top 64K segment */
-        /* of conventional memory, but does not adjust lowmem. */
-        if ((lowmem - ebda_addr) <= 0x10000)
-                lowmem = ebda_addr;
-
-        /* Fixup: bios does not report an EBDA at all. */
-        /* Some old Dells seem to need 4k anyhow (bugzilla 2990) */
-        if ((ebda_addr == 0) && (lowmem >= 0x9f000))
-                lowmem = 0x9f000;
-
-        /* Paranoia: should never happen, but... */
-        if ((lowmem == 0) || (lowmem >= 0x100000))
-                lowmem = 0x9f000;
-
-        /* reserve all memory between lowmem and the 1MB mark */
-        reserve_bootmem(lowmem, 0x100000 - lowmem, BOOTMEM_DEFAULT);
-}
-
 #ifndef CONFIG_NEED_MULTIPLE_NODES
 static void __init setup_bootmem_allocator(void);
 static unsigned long __init setup_memory(void)
@@ -522,25 +472,32 @@ static void __init reserve_initrd(void)
         unsigned long end_of_lowmem = max_low_pfn << PAGE_SHIFT;
         unsigned long ramdisk_here;
 
-        initrd_start = 0;
-
         if (!boot_params.hdr.type_of_loader ||
             !ramdisk_image || !ramdisk_size)
                 return;         /* No initrd provided by bootloader */
 
+        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);
                 printk(KERN_ERR "initrd too large to handle, "
                        "disabling initrd\n");
                 return;
         }
+
         if (ramdisk_end <= end_of_lowmem) {
                 /* All in lowmem, easy case */
-                reserve_bootmem(ramdisk_image, ramdisk_size, BOOTMEM_DEFAULT);
+                /*
+                 * don't need to reserve again, already reserved early
+                 * in i386_start_kernel, and early_res_to_bootmem
+                 * convert that to reserved in bootmem
+                 */
                 initrd_start = ramdisk_image + PAGE_OFFSET;
                 initrd_end = initrd_start+ramdisk_size;
                 return;
@@ -582,6 +539,8 @@ static void __init relocate_initrd(void)
                 p = (char *)__va(ramdisk_image);
                 memcpy(q, p, clen);
                 q += clen;
+                /* need to free these low pages...*/
+                free_bootmem(ramdisk_image, clen);
                 ramdisk_image += clen;
                 ramdisk_size  -= clen;
         }
@@ -600,47 +559,28 @@ static void __init relocate_initrd(void)
                 ramdisk_image += clen;
                 ramdisk_size  -= clen;
         }
+        /* high pages is not converted by early_res_to_bootmem */
 }
 
 #endif /* CONFIG_BLK_DEV_INITRD */
 
 void __init setup_bootmem_allocator(void)
 {
-        unsigned long bootmap_size;
+        unsigned long bootmap_size, bootmap;
         /*
          * Initialize the boot-time allocator (with low memory only):
          */
-        bootmap_size = init_bootmem(min_low_pfn, max_low_pfn);
-
+        bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
+        bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT,
+                                 max_low_pfn<<PAGE_SHIFT, bootmap_size,
+                                 PAGE_SIZE);
+        if (bootmap == -1L)
+                panic("Cannot find bootmem map of size %ld\n", bootmap_size);
+        bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn);
         register_bootmem_low_pages(max_low_pfn);
+        early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
+        reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
 
-        /*
-         * Reserve the bootmem bitmap itself as well. We do this in two
-         * steps (first step was init_bootmem()) because this catches
-         * the (very unlikely) case of us accidentally initializing the
-         * bootmem allocator with an invalid RAM area.
-         */
-        reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
-                         bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text),
-                         BOOTMEM_DEFAULT);
-
-        /*
-         * reserve physical page 0 - it's a special BIOS page on many boxes,
-         * enabling clean reboots, SMP operation, laptop functions.
-         */
-        reserve_bootmem(0, PAGE_SIZE, BOOTMEM_DEFAULT);
-
-        /* reserve EBDA region */
-        reserve_ebda_region();
-
-#ifdef 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)
-         */
-        reserve_bootmem(PAGE_SIZE, PAGE_SIZE, BOOTMEM_DEFAULT);
-#endif
 #ifdef CONFIG_ACPI_SLEEP
         /*
          * Reserve low memory region for sleep support.
@@ -803,9 +743,6 @@ void __init setup_arch(char **cmdline_p)
          * not to exceed the 8Mb limit.
          */
 
-#ifdef CONFIG_SMP
-        smp_alloc_memory(); /* AP processor realmode stacks in low memory*/
-#endif
         paging_init();
 
         /*