arch/ia64/include/asm/fpswa.h

   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
  12 typedef struct {
  13         /* 4 * 128 bits */
  14         unsigned long fp_lp[4*2];
  15 } fp_state_low_preserved_t;
  16
  17 typedef struct {
  18         /* 10 * 128 bits */
  19         unsigned long fp_lv[10 * 2];
  20 } fp_state_low_volatile_t;
  21
  22 typedef struct {
  23         /* 16 * 128 bits */
  24         unsigned long fp_hp[16 * 2];
  25 } fp_state_high_preserved_t;
  26
  27 typedef 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  */
  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;
  44
  45 typedef 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  */
  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);
  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  */
  65 typedef struct {
  66         unsigned int     revision;
  67         unsigned int     reserved;
  68         efi_fpswa_t      fpswa;
  69 } fpswa_interface_t;
  70
  71 extern fpswa_interface_t *fpswa_interface;
  72
  73 #endif /* _ASM_IA64_FPSWA_H */