1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Function calling ABI conversion from Linux to EFI for x86_64
4 *
5 * Copyright (C) 2007 Intel Corp
6 *	Bibo Mao <bibo.mao@intel.com>
7 *	Huang Ying <ying.huang@intel.com>
8 */
9
10#include <linux/linkage.h>
11#include <asm/segment.h>
12#include <asm/msr.h>
13#include <asm/processor-flags.h>
14#include <asm/page_types.h>
15
16#define SAVE_XMM			\
17	mov %rsp, %rax;			\
18	subq $0x70, %rsp;		\
19	and $~0xf, %rsp;		\
20	mov %rax, (%rsp);		\
21	mov %cr0, %rax;			\
22	clts;				\
23	mov %rax, 0x8(%rsp);		\
24	movaps %xmm0, 0x60(%rsp);	\
25	movaps %xmm1, 0x50(%rsp);	\
26	movaps %xmm2, 0x40(%rsp);	\
27	movaps %xmm3, 0x30(%rsp);	\
28	movaps %xmm4, 0x20(%rsp);	\
29	movaps %xmm5, 0x10(%rsp)
30
31#define RESTORE_XMM			\
32	movaps 0x60(%rsp), %xmm0;	\
33	movaps 0x50(%rsp), %xmm1;	\
34	movaps 0x40(%rsp), %xmm2;	\
35	movaps 0x30(%rsp), %xmm3;	\
36	movaps 0x20(%rsp), %xmm4;	\
37	movaps 0x10(%rsp), %xmm5;	\
38	mov 0x8(%rsp), %rsi;		\
39	mov %rsi, %cr0;			\
40	mov (%rsp), %rsp
41
42ENTRY(efi_call)
43	pushq %rbp
44	movq %rsp, %rbp
45	SAVE_XMM
46	mov 16(%rbp), %rax
47	subq $48, %rsp
48	mov %r9, 32(%rsp)
49	mov %rax, 40(%rsp)
50	mov %r8, %r9
51	mov %rcx, %r8
52	mov %rsi, %rcx
53	call *%rdi
54	addq $48, %rsp
55	RESTORE_XMM
56	popq %rbp
57	ret
58ENDPROC(efi_call)
59