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.text
#include <xen/config.h>
#include <xen/multiboot.h>
#include <public/xen.h>
#include <asm/asm_defns.h>
#include <asm/desc.h>
#include <asm/page.h>
#include <asm/msr.h>
.code64
#define GREG(x) %r##x
#define SAVED_GREG(x) saved_r##x(%rip)
#define DECLARE_GREG(x) saved_r##x: .quad 0
#define SAVE_GREG(x) movq GREG(x), SAVED_GREG(x)
#define LOAD_GREG(x) movq SAVED_GREG(x), GREG(x)
#define REF(x) x(%rip)
ENTRY(do_suspend_lowlevel)
SAVE_GREG(sp)
SAVE_GREG(ax)
SAVE_GREG(bx)
SAVE_GREG(cx)
SAVE_GREG(dx)
SAVE_GREG(bp)
SAVE_GREG(si)
SAVE_GREG(di)
SAVE_GREG(8) # save r8...r15
SAVE_GREG(9)
SAVE_GREG(10)
SAVE_GREG(11)
SAVE_GREG(12)
SAVE_GREG(13)
SAVE_GREG(14)
SAVE_GREG(15)
pushfq;
popq SAVED_GREG(flags)
mov %cr8, GREG(ax)
mov GREG(ax), REF(saved_cr8)
mov %ss, REF(saved_ss)
sgdt REF(saved_gdt)
sidt REF(saved_idt)
sldt REF(saved_ldt)
mov %cr0, GREG(ax)
mov GREG(ax), REF(saved_cr0)
mov %cr3, GREG(ax)
mov GREG(ax), REF(saved_cr3)
call save_rest_processor_state
mov $3, %rdi
xor %eax, %eax
/* enter sleep state physically */
call acpi_enter_sleep_state
jmp __ret_point
ENTRY(__ret_point)
/* mmu_cr4_features contains latest cr4 setting */
mov REF(mmu_cr4_features), GREG(ax)
mov GREG(ax), %cr4
mov REF(saved_cr3), GREG(ax)
mov GREG(ax), %cr3
mov REF(saved_cr0), GREG(ax)
mov GREG(ax), %cr0
lgdt REF(saved_gdt)
lidt REF(saved_idt)
lldt REF(saved_ldt)
mov REF(saved_ss), %ss
LOAD_GREG(sp)
/* Reload code selector */
pushq $(__HYPERVISOR_CS64)
leaq 1f(%rip),%rax
pushq %rax
lretq
1:
mov REF(saved_cr8), %rax
mov %rax, %cr8
pushq SAVED_GREG(flags)
popfq
call restore_rest_processor_state
LOAD_GREG(bp)
LOAD_GREG(ax)
LOAD_GREG(bx)
LOAD_GREG(cx)
LOAD_GREG(dx)
LOAD_GREG(si)
LOAD_GREG(di)
LOAD_GREG(8) # save r8...r15
LOAD_GREG(9)
LOAD_GREG(10)
LOAD_GREG(11)
LOAD_GREG(12)
LOAD_GREG(13)
LOAD_GREG(14)
LOAD_GREG(15)
ret
.data
.align 16
GLOBAL(saved_magic)
.long 0x9abcdef0
saved_ss: .word 0
.align 8
DECLARE_GREG(sp)
DECLARE_GREG(bp)
DECLARE_GREG(ax)
DECLARE_GREG(bx)
DECLARE_GREG(cx)
DECLARE_GREG(dx)
DECLARE_GREG(si)
DECLARE_GREG(di)
DECLARE_GREG(flags)
DECLARE_GREG(8)
DECLARE_GREG(9)
DECLARE_GREG(10)
DECLARE_GREG(11)
DECLARE_GREG(12)
DECLARE_GREG(13)
DECLARE_GREG(14)
DECLARE_GREG(15)
saved_gdt: .quad 0,0
saved_idt: .quad 0,0
saved_ldt: .quad 0,0
saved_cr0: .quad 0
saved_cr3: .quad 0
saved_cr8: .quad 0
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