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Diffstat (limited to 'arch/x86/kernel/traps.c')
-rw-r--r--arch/x86/kernel/traps.c107
1 files changed, 3 insertions, 104 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index bf54309b85da..34ea3651362e 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -38,11 +38,6 @@
#include <linux/smp.h>
#include <linux/io.h>
-#ifdef CONFIG_EISA
-#include <linux/ioport.h>
-#include <linux/eisa.h>
-#endif
-
#if defined(CONFIG_EDAC)
#include <linux/edac.h>
#endif
@@ -70,20 +65,13 @@
#include <asm/x86_init.h>
#include <asm/pgalloc.h>
#include <asm/proto.h>
-
-/* No need to be aligned, but done to keep all IDTs defined the same way. */
-gate_desc debug_idt_table[NR_VECTORS] __page_aligned_bss;
#else
#include <asm/processor-flags.h>
#include <asm/setup.h>
#include <asm/proto.h>
#endif
-/* Must be page-aligned because the real IDT is used in a fixmap. */
-gate_desc idt_table[NR_VECTORS] __page_aligned_bss;
-
DECLARE_BITMAP(used_vectors, NR_VECTORS);
-EXPORT_SYMBOL_GPL(used_vectors);
static inline void cond_local_irq_enable(struct pt_regs *regs)
{
@@ -935,87 +923,9 @@ dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code)
}
#endif
-/* Set of traps needed for early debugging. */
-void __init early_trap_init(void)
-{
- /*
- * Don't use IST to set DEBUG_STACK as it doesn't work until TSS
- * is ready in cpu_init() <-- trap_init(). Before trap_init(),
- * CPU runs at ring 0 so it is impossible to hit an invalid
- * stack. Using the original stack works well enough at this
- * early stage. DEBUG_STACK will be equipped after cpu_init() in
- * trap_init().
- *
- * We don't need to set trace_idt_table like set_intr_gate(),
- * since we don't have trace_debug and it will be reset to
- * 'debug' in trap_init() by set_intr_gate_ist().
- */
- set_intr_gate_notrace(X86_TRAP_DB, debug);
- /* int3 can be called from all */
- set_system_intr_gate(X86_TRAP_BP, &int3);
-#ifdef CONFIG_X86_32
- set_intr_gate(X86_TRAP_PF, page_fault);
-#endif
- load_idt(&idt_descr);
-}
-
-void __init early_trap_pf_init(void)
-{
-#ifdef CONFIG_X86_64
- set_intr_gate(X86_TRAP_PF, page_fault);
-#endif
-}
-
void __init trap_init(void)
{
- int i;
-
-#ifdef CONFIG_EISA
- void __iomem *p = early_ioremap(0x0FFFD9, 4);
-
- if (readl(p) == 'E' + ('I'<<8) + ('S'<<16) + ('A'<<24))
- EISA_bus = 1;
- early_iounmap(p, 4);
-#endif
-
- set_intr_gate(X86_TRAP_DE, divide_error);
- set_intr_gate_ist(X86_TRAP_NMI, &nmi, NMI_STACK);
- /* int4 can be called from all */
- set_system_intr_gate(X86_TRAP_OF, &overflow);
- set_intr_gate(X86_TRAP_BR, bounds);
- set_intr_gate(X86_TRAP_UD, invalid_op);
- set_intr_gate(X86_TRAP_NM, device_not_available);
-#ifdef CONFIG_X86_32
- set_task_gate(X86_TRAP_DF, GDT_ENTRY_DOUBLEFAULT_TSS);
-#else
- set_intr_gate_ist(X86_TRAP_DF, &double_fault, DOUBLEFAULT_STACK);
-#endif
- set_intr_gate(X86_TRAP_OLD_MF, coprocessor_segment_overrun);
- set_intr_gate(X86_TRAP_TS, invalid_TSS);
- set_intr_gate(X86_TRAP_NP, segment_not_present);
- set_intr_gate(X86_TRAP_SS, stack_segment);
- set_intr_gate(X86_TRAP_GP, general_protection);
- set_intr_gate(X86_TRAP_SPURIOUS, spurious_interrupt_bug);
- set_intr_gate(X86_TRAP_MF, coprocessor_error);
- set_intr_gate(X86_TRAP_AC, alignment_check);
-#ifdef CONFIG_X86_MCE
- set_intr_gate_ist(X86_TRAP_MC, &machine_check, MCE_STACK);
-#endif
- set_intr_gate(X86_TRAP_XF, simd_coprocessor_error);
-
- /* Reserve all the builtin and the syscall vector: */
- for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
- set_bit(i, used_vectors);
-
-#ifdef CONFIG_IA32_EMULATION
- set_system_intr_gate(IA32_SYSCALL_VECTOR, entry_INT80_compat);
- set_bit(IA32_SYSCALL_VECTOR, used_vectors);
-#endif
-
-#ifdef CONFIG_X86_32
- set_system_intr_gate(IA32_SYSCALL_VECTOR, entry_INT80_32);
- set_bit(IA32_SYSCALL_VECTOR, used_vectors);
-#endif
+ idt_setup_traps();
/*
* Set the IDT descriptor to a fixed read-only location, so that the
@@ -1030,20 +940,9 @@ void __init trap_init(void)
*/
cpu_init();
- /*
- * X86_TRAP_DB and X86_TRAP_BP have been set
- * in early_trap_init(). However, ITS works only after
- * cpu_init() loads TSS. See comments in early_trap_init().
- */
- set_intr_gate_ist(X86_TRAP_DB, &debug, DEBUG_STACK);
- /* int3 can be called from all */
- set_system_intr_gate_ist(X86_TRAP_BP, &int3, DEBUG_STACK);
+ idt_setup_ist_traps();
x86_init.irqs.trap_init();
-#ifdef CONFIG_X86_64
- memcpy(&debug_idt_table, &idt_table, IDT_ENTRIES * 16);
- set_nmi_gate(X86_TRAP_DB, &debug);
- set_nmi_gate(X86_TRAP_BP, &int3);
-#endif
+ idt_setup_debugidt_traps();
}