nfs: nfs4xdr: encode_compound_hdr does not have to round up reserved bytes

[safe/jmp/linux-2.6] / arch / x86 / kernel / relocate_kernel_32.S

diff --git a/arch/x86/kernel/relocate_kernel_32.S b/arch/x86/kernel/relocate_kernel_32.S
index 703310a..4123553 100644 (file)
--- a/arch/x86/kernel/relocate_kernel_32.S
+++ b/arch/x86/kernel/relocate_kernel_32.S
@@ -7,23 +7,22 @@
  */
 
 #include <linux/linkage.h>
-#include <asm/page.h>
+#include <asm/page_types.h>
 #include <asm/kexec.h>
 #include <asm/processor-flags.h>
-#include <asm/pgtable.h>
 
 /*
  * Must be relocatable PIC code callable as a C function
  */
 
 #define PTR(x) (x << 2)
-#define PAGE_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
-#define PAE_PGD_ATTR (_PAGE_PRESENT)
 
-/* control_page + PAGE_SIZE/2 ~ control_page + PAGE_SIZE * 3/4 are
- * used to save some data for jumping back
+/*
+ * control_page + KEXEC_CONTROL_CODE_MAX_SIZE
+ * ~ control_page + PAGE_SIZE are used as data storage and stack for
+ * jumping back
  */
-#define DATA(offset)           (PAGE_SIZE/2+(offset))
+#define DATA(offset)           (KEXEC_CONTROL_CODE_MAX_SIZE+(offset))
 
 /* Minimal CPU state */
 #define ESP                    DATA(0x0)
@@ -38,7 +37,6 @@
 #define CP_PA_BACKUP_PAGES_MAP DATA(0x1c)
 
        .text
-       .align PAGE_SIZE
        .globl relocate_kernel
 relocate_kernel:
        /* Save the CPU context, used for jumping back */
@@ -59,117 +57,6 @@ relocate_kernel:
        movl    %cr4, %eax
        movl    %eax, CR4(%edi)
 
-#ifdef CONFIG_X86_PAE
-       /* map the control page at its virtual address */
-
-       movl    PTR(VA_PGD)(%ebp), %edi
-       movl    PTR(VA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0xc0000000, %eax
-       shrl    $27, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_PMD_0)(%ebp), %edx
-       orl     $PAE_PGD_ATTR, %edx
-       movl    %edx, (%eax)
-
-       movl    PTR(VA_PMD_0)(%ebp), %edi
-       movl    PTR(VA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0x3fe00000, %eax
-       shrl    $18, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_PTE_0)(%ebp), %edx
-       orl     $PAGE_ATTR, %edx
-       movl    %edx, (%eax)
-
-       movl    PTR(VA_PTE_0)(%ebp), %edi
-       movl    PTR(VA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0x001ff000, %eax
-       shrl    $9, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_CONTROL_PAGE)(%ebp), %edx
-       orl     $PAGE_ATTR, %edx
-       movl    %edx, (%eax)
-
-       /* identity map the control page at its physical address */
-
-       movl    PTR(VA_PGD)(%ebp), %edi
-       movl    PTR(PA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0xc0000000, %eax
-       shrl    $27, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_PMD_1)(%ebp), %edx
-       orl     $PAE_PGD_ATTR, %edx
-       movl    %edx, (%eax)
-
-       movl    PTR(VA_PMD_1)(%ebp), %edi
-       movl    PTR(PA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0x3fe00000, %eax
-       shrl    $18, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_PTE_1)(%ebp), %edx
-       orl     $PAGE_ATTR, %edx
-       movl    %edx, (%eax)
-
-       movl    PTR(VA_PTE_1)(%ebp), %edi
-       movl    PTR(PA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0x001ff000, %eax
-       shrl    $9, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_CONTROL_PAGE)(%ebp), %edx
-       orl     $PAGE_ATTR, %edx
-       movl    %edx, (%eax)
-#else
-       /* map the control page at its virtual address */
-
-       movl    PTR(VA_PGD)(%ebp), %edi
-       movl    PTR(VA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0xffc00000, %eax
-       shrl    $20, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_PTE_0)(%ebp), %edx
-       orl     $PAGE_ATTR, %edx
-       movl    %edx, (%eax)
-
-       movl    PTR(VA_PTE_0)(%ebp), %edi
-       movl    PTR(VA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0x003ff000, %eax
-       shrl    $10, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_CONTROL_PAGE)(%ebp), %edx
-       orl     $PAGE_ATTR, %edx
-       movl    %edx, (%eax)
-
-       /* identity map the control page at its physical address */
-
-       movl    PTR(VA_PGD)(%ebp), %edi
-       movl    PTR(PA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0xffc00000, %eax
-       shrl    $20, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_PTE_1)(%ebp), %edx
-       orl     $PAGE_ATTR, %edx
-       movl    %edx, (%eax)
-
-       movl    PTR(VA_PTE_1)(%ebp), %edi
-       movl    PTR(PA_CONTROL_PAGE)(%ebp), %eax
-       andl    $0x003ff000, %eax
-       shrl    $10, %eax
-       addl    %edi, %eax
-
-       movl    PTR(PA_CONTROL_PAGE)(%ebp), %edx
-       orl     $PAGE_ATTR, %edx
-       movl    %edx, (%eax)
-#endif
-
-relocate_new_kernel:
        /* read the arguments and say goodbye to the stack */
        movl  20+4(%esp), %ebx /* page_list */
        movl  20+8(%esp), %ebp /* list of pages */
@@ -190,8 +77,10 @@ relocate_new_kernel:
        movl    %eax, CP_PA_SWAP_PAGE(%edi)
        movl    %ebx, CP_PA_BACKUP_PAGES_MAP(%edi)
 
-       /* get physical address of control page now */
-       /* this is impossible after page table switch */
+       /*
+        * get physical address of control page now
+        * this is impossible after page table switch
+        */
        movl    PTR(PA_CONTROL_PAGE)(%ebp), %edi
 
        /* switch to new set of page tables */
@@ -211,7 +100,8 @@ identity_mapped:
        /* store the start address on the stack */
        pushl   %edx
 
-       /* Set cr0 to a known state:
+       /*
+        * Set cr0 to a known state:
         *  - Paging disabled
         *  - Alignment check disabled
         *  - Write protect disabled
@@ -227,7 +117,8 @@ identity_mapped:
        /* clear cr4 if applicable */
        testl   %ecx, %ecx
        jz      1f
-       /* Set cr4 to a known state:
+       /*
+        * Set cr4 to a known state:
         * Setting everything to zero seems safe.
         */
        xorl    %eax, %eax
@@ -246,15 +137,18 @@ identity_mapped:
        call    swap_pages
        addl    $8, %esp
 
-       /* To be certain of avoiding problems with self-modifying code
+       /*
+        * To be certain of avoiding problems with self-modifying code
         * I need to execute a serializing instruction here.
         * So I flush the TLB, it's handy, and not processor dependent.
         */
        xorl    %eax, %eax
        movl    %eax, %cr3
 
-       /* set all of the registers to known values */
-       /* leave %esp alone */
+       /*
+        * set all of the registers to known values
+        * leave %esp alone
+        */
 
        testl   %esi, %esi
        jnz 1f
@@ -376,3 +270,6 @@ swap_pages:
        popl    %ebx
        popl    %ebp
        ret
+
+       .globl kexec_control_code_size
+.set kexec_control_code_size, . - relocate_kernel