1#ifndef _ASM_IA64_FPSWA_H
2#define _ASM_IA64_FPSWA_H
3
4/*
5 * Floating-point Software Assist
6 *
7 * Copyright (C) 1999 Intel Corporation.
8 * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>
9 * Copyright (C) 1999 Goutham Rao <goutham.rao@intel.com>
10 */
11
12typedef struct {
13	/* 4 * 128 bits */
14	unsigned long fp_lp[4*2];
15} fp_state_low_preserved_t;
16
17typedef struct {
18	/* 10 * 128 bits */
19	unsigned long fp_lv[10 * 2];
20} fp_state_low_volatile_t;
21
22typedef	struct {
23	/* 16 * 128 bits */
24	unsigned long fp_hp[16 * 2];
25} fp_state_high_preserved_t;
26
27typedef struct {
28	/* 96 * 128 bits */
29	unsigned long fp_hv[96 * 2];
30} fp_state_high_volatile_t;
31
32/**
33 * floating point state to be passed to the FP emulation library by
34 * the trap/fault handler
35 */
36typedef struct {
37	unsigned long			bitmask_low64;
38	unsigned long			bitmask_high64;
39	fp_state_low_preserved_t	*fp_state_low_preserved;
40	fp_state_low_volatile_t		*fp_state_low_volatile;
41	fp_state_high_preserved_t	*fp_state_high_preserved;
42	fp_state_high_volatile_t	*fp_state_high_volatile;
43} fp_state_t;
44
45typedef struct {
46	unsigned long status;
47	unsigned long err0;
48	unsigned long err1;
49	unsigned long err2;
50} fpswa_ret_t;
51
52/**
53 * function header for the Floating Point software assist
54 * library. This function is invoked by the Floating point software
55 * assist trap/fault handler.
56 */
57typedef fpswa_ret_t (*efi_fpswa_t) (unsigned long trap_type, void *bundle, unsigned long *ipsr,
58				    unsigned long *fsr, unsigned long *isr, unsigned long *preds,
59				    unsigned long *ifs, fp_state_t *fp_state);
60
61/**
62 * This is the FPSWA library interface as defined by EFI.  We need to pass a
63 * pointer to the interface itself on a call to the assist library
64 */
65typedef struct {
66	unsigned int	 revision;
67	unsigned int	 reserved;
68	efi_fpswa_t	 fpswa;
69} fpswa_interface_t;
70
71extern fpswa_interface_t *fpswa_interface;
72
73#endif /* _ASM_IA64_FPSWA_H */
74