[PATCH] x86: increase interrupt vector range

[safe/jmp/linux-2.6] / arch / i386 / kernel / head.S

diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S
index 58d2746..3debc2e 100644 (file)
--- a/arch/i386/kernel/head.S
+++ b/arch/i386/kernel/head.S
@@ -398,7 +398,11 @@ ignore_int:
        pushl 32(%esp)
        pushl 40(%esp)
        pushl $int_msg
+#ifdef CONFIG_EARLY_PRINTK
+       call early_printk
+#else
        call printk
+#endif
        addl $(5*4),%esp
        popl %ds
        popl %es
@@ -446,7 +450,6 @@ int_msg:
 
 .globl boot_gdt_descr
 .globl idt_descr
-.globl cpu_gdt_descr
 
        ALIGN
 # early boot GDT descriptor (must use 1:1 address mapping)
@@ -466,8 +469,6 @@ cpu_gdt_descr:
        .word GDT_ENTRIES*8-1
        .long cpu_gdt_table
 
-       .fill NR_CPUS-1,8,0             # space for the other GDT descriptors
-
 /*
  * The boot_gdt_table must mirror the equivalent in setup.S and is
  * used only for booting.
@@ -481,7 +482,7 @@ ENTRY(boot_gdt_table)
 /*
  * The Global Descriptor Table contains 28 quadwords, per-CPU.
  */
-       .align PAGE_SIZE_asm
+       .align L1_CACHE_BYTES
 ENTRY(cpu_gdt_table)
        .quad 0x0000000000000000        /* NULL descriptor */
        .quad 0x0000000000000000        /* 0x0b reserved */
@@ -504,10 +505,14 @@ ENTRY(cpu_gdt_table)
        .quad 0x0000000000000000        /* 0x80 TSS descriptor */
        .quad 0x0000000000000000        /* 0x88 LDT descriptor */
 
-       /* Segments used for calling PnP BIOS have byte granularity */
-       .quad 0x00409a0000000000        /* 0x90 32-bit code */
-       .quad 0x00009a0000000000        /* 0x98 16-bit code */
-       .quad 0x0000920000000000        /* 0xa0 16-bit data */
+       /*
+        * Segments used for calling PnP BIOS have byte granularity.
+        * They code segments and data segments have fixed 64k limits,
+        * the transfer segment sizes are set at run time.
+        */
+       .quad 0x00409a000000ffff        /* 0x90 32-bit code */
+       .quad 0x00009a000000ffff        /* 0x98 16-bit code */
+       .quad 0x000092000000ffff        /* 0xa0 16-bit data */
        .quad 0x0000920000000000        /* 0xa8 16-bit data */
        .quad 0x0000920000000000        /* 0xb0 16-bit data */
 
@@ -526,5 +531,3 @@ ENTRY(cpu_gdt_table)
        .quad 0x0000000000000000        /* 0xf0 - unused */
        .quad 0x0000000000000000        /* 0xf8 - GDT entry 31: double-fault TSS */
 
-       /* Be sure this is zeroed to avoid false validations in Xen */
-       .fill PAGE_SIZE_asm / 8 - GDT_ENTRIES,8,0