#include <asm/msr.h>
#include <asm/cache.h>
+#ifdef CONFIG_PARAVIRT
+#include <asm/asm-offsets.h>
+#include <asm/paravirt.h>
+#else
+#define GET_CR2_INTO_RCX movq %cr2, %rcx
+#endif
+
/* we are not able to switch in one step to the final KERNEL ADRESS SPACE
* because we need identity-mapped pages.
*
/* Is the address not 2M aligned? */
movq %rbp, %rax
- andl $~LARGE_PAGE_MASK, %eax
+ andl $~PMD_PAGE_MASK, %eax
testl %eax, %eax
jnz bad_address
/* Add an Identity mapping if I am above 1G */
leaq _text(%rip), %rdi
- andq $LARGE_PAGE_MASK, %rdi
+ andq $PMD_PAGE_MASK, %rdi
movq %rdi, %rax
shrq $PUD_SHIFT, %rax
movq %rdx, 0(%rbx, %rax, 8)
ident_complete:
- /* Fixup the kernel text+data virtual addresses
+ /*
+ * Fixup the kernel text+data virtual addresses. Note that
+ * we might write invalid pmds, when the kernel is relocated
+ * cleanup_highmap() fixes this up along with the mappings
+ * beyond _end.
*/
+
leaq level2_kernel_pgt(%rip), %rdi
leaq 4096(%rdi), %r8
/* See if it is a valid page table entry */
lretq
/* SMP bootup changes these two */
-#ifndef CONFIG_HOTPLUG_CPU
- .pushsection .init.data
-#endif
+ __REFDATA
.align 8
- .globl initial_code
-initial_code:
+ ENTRY(initial_code)
.quad x86_64_start_kernel
-#ifndef CONFIG_HOTPLUG_CPU
- .popsection
-#endif
- .globl init_rsp
-init_rsp:
+ __FINITDATA
+
+ ENTRY(init_rsp)
.quad init_thread_union+THREAD_SIZE-8
bad_address:
jmp bad_address
+#ifdef CONFIG_EARLY_PRINTK
+.macro early_idt_tramp first, last
+ .ifgt \last-\first
+ early_idt_tramp \first, \last-1
+ .endif
+ movl $\last,%esi
+ jmp early_idt_handler
+.endm
+
+ .globl early_idt_handlers
+early_idt_handlers:
+ early_idt_tramp 0, 63
+ early_idt_tramp 64, 127
+ early_idt_tramp 128, 191
+ early_idt_tramp 192, 255
+#endif
+
ENTRY(early_idt_handler)
+#ifdef CONFIG_EARLY_PRINTK
cmpl $2,early_recursion_flag(%rip)
jz 1f
incl early_recursion_flag(%rip)
+ GET_CR2_INTO_RCX
+ movq %rcx,%r9
+ xorl %r8d,%r8d # zero for error code
+ movl %esi,%ecx # get vector number
+ # Test %ecx against mask of vectors that push error code.
+ cmpl $31,%ecx
+ ja 0f
+ movl $1,%eax
+ salq %cl,%rax
+ testl $0x27d00,%eax
+ je 0f
+ popq %r8 # get error code
+0: movq 0(%rsp),%rcx # get ip
+ movq 8(%rsp),%rdx # get cs
xorl %eax,%eax
- movq 8(%rsp),%rsi # get rip
- movq (%rsp),%rdx
- movq %cr2,%rcx
leaq early_idt_msg(%rip),%rdi
call early_printk
cmpl $2,early_recursion_flag(%rip)
movq 8(%rsp),%rsi # get rip again
call __print_symbol
#endif
+#endif /* EARLY_PRINTK */
1: hlt
jmp 1b
+
+#ifdef CONFIG_EARLY_PRINTK
early_recursion_flag:
.long 0
early_idt_msg:
- .asciz "PANIC: early exception rip %lx error %lx cr2 %lx\n"
+ .asciz "PANIC: early exception %02lx rip %lx:%lx error %lx cr2 %lx\n"
early_idt_ripmsg:
.asciz "RIP %s\n"
+#endif /* CONFIG_EARLY_PRINTK */
.balign PAGE_SIZE