ia64/xen-unstable

view xen/include/asm-ia64/linux/asm/fpswa.h @ 10157:faae893d428e

[IA64] support FPSWA emulation

Signed-off-by: Masaki Kanno <kanno.masaki@jp.fujitsu.com>
author awilliam@xenbuild.aw
date Thu May 25 15:47:33 2006 -0600 (2006-05-25)
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1 #ifndef _ASM_IA64_FPSWA_H
2 #define _ASM_IA64_FPSWA_H
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 */
12 typedef struct {
13 /* 4 * 128 bits */
14 unsigned long fp_lp[4*2];
15 } fp_state_low_preserved_t;
17 typedef struct {
18 /* 10 * 128 bits */
19 unsigned long fp_lv[10 * 2];
20 } fp_state_low_volatile_t;
22 typedef struct {
23 /* 16 * 128 bits */
24 unsigned long fp_hp[16 * 2];
25 } fp_state_high_preserved_t;
27 typedef struct {
28 /* 96 * 128 bits */
29 unsigned long fp_hv[96 * 2];
30 } fp_state_high_volatile_t;
32 /**
33 * floating point state to be passed to the FP emulation library by
34 * the trap/fault handler
35 */
36 typedef 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;
45 typedef struct {
46 unsigned long status;
47 unsigned long err0;
48 unsigned long err1;
49 unsigned long err2;
50 } fpswa_ret_t;
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 */
57 typedef 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);
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 */
65 typedef struct {
66 unsigned int revision;
67 unsigned int reserved;
68 efi_fpswa_t fpswa;
69 } fpswa_interface_t;
71 extern fpswa_interface_t *fpswa_interface;
73 #endif /* _ASM_IA64_FPSWA_H */