1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_IA64_FPSWA_H 3 #define _ASM_IA64_FPSWA_H 4 5 /* 6 * Floating-point Software Assist 7 * 8 * Copyright (C) 1999 Intel Corporation. 9 * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com> 10 * Copyright (C) 1999 Goutham Rao <goutham.rao@intel.com> 11 */ 12 13 typedef struct { 14 /* 4 * 128 bits */ 15 unsigned long fp_lp[4*2]; 16 } fp_state_low_preserved_t; 17 18 typedef struct { 19 /* 10 * 128 bits */ 20 unsigned long fp_lv[10 * 2]; 21 } fp_state_low_volatile_t; 22 23 typedef struct { 24 /* 16 * 128 bits */ 25 unsigned long fp_hp[16 * 2]; 26 } fp_state_high_preserved_t; 27 28 typedef struct { 29 /* 96 * 128 bits */ 30 unsigned long fp_hv[96 * 2]; 31 } fp_state_high_volatile_t; 32 33 /** 34 * floating point state to be passed to the FP emulation library by 35 * the trap/fault handler 36 */ 37 typedef struct { 38 unsigned long bitmask_low64; 39 unsigned long bitmask_high64; 40 fp_state_low_preserved_t *fp_state_low_preserved; 41 fp_state_low_volatile_t *fp_state_low_volatile; 42 fp_state_high_preserved_t *fp_state_high_preserved; 43 fp_state_high_volatile_t *fp_state_high_volatile; 44 } fp_state_t; 45 46 typedef struct { 47 unsigned long status; 48 unsigned long err0; 49 unsigned long err1; 50 unsigned long err2; 51 } fpswa_ret_t; 52 53 /** 54 * function header for the Floating Point software assist 55 * library. This function is invoked by the Floating point software 56 * assist trap/fault handler. 57 */ 58 typedef fpswa_ret_t (*efi_fpswa_t) (unsigned long trap_type, void *bundle, unsigned long *ipsr, 59 unsigned long *fsr, unsigned long *isr, unsigned long *preds, 60 unsigned long *ifs, fp_state_t *fp_state); 61 62 /** 63 * This is the FPSWA library interface as defined by EFI. We need to pass a 64 * pointer to the interface itself on a call to the assist library 65 */ 66 typedef struct { 67 unsigned int revision; 68 unsigned int reserved; 69 efi_fpswa_t fpswa; 70 } fpswa_interface_t; 71 72 extern fpswa_interface_t *fpswa_interface; 73 74 #endif /* _ASM_IA64_FPSWA_H */ 75