/* SPDX-License-Identifier: GPL-2.0 */ // Copyright (C) 2005-2017 Andes Technology Corporation #ifndef _ASMNDS32_SIGCONTEXT_H #define _ASMNDS32_SIGCONTEXT_H /* * Signal context structure - contains all info to do with the state * before the signal handler was invoked. Note: only add new entries * to the end of the structure. */ struct fpu_struct { unsigned long long fd_regs[32]; unsigned long fpcsr; /* * When CONFIG_SUPPORT_DENORMAL_ARITHMETIC is defined, kernel prevents * hardware from treating the denormalized output as an underflow case * and rounding it to a normal number. Hence kernel enables the UDF and * IEX trap in the fpcsr register to step in the calculation. * However, the UDF and IEX trap enable bit in $fpcsr also lose * their use. * * UDF_IEX_trap replaces the feature of UDF and IEX trap enable bit in * $fpcsr to control the trap of underflow and inexact. The bit filed * of UDF_IEX_trap is the same as $fpcsr, 10th bit is used to enable UDF * exception trapping and 11th bit is used to enable IEX exception * trapping. * * UDF_IEX_trap is only modified through fp_udfiex_crtl syscall. * Therefore, UDF_IEX_trap needn't be saved and restored in each * context switch. */ unsigned long UDF_IEX_trap; }; struct zol_struct { unsigned long nds32_lc; /* $LC */ unsigned long nds32_le; /* $LE */ unsigned long nds32_lb; /* $LB */ }; struct sigcontext { unsigned long trap_no; unsigned long error_code; unsigned long oldmask; unsigned long nds32_r0; unsigned long nds32_r1; unsigned long nds32_r2; unsigned long nds32_r3; unsigned long nds32_r4; unsigned long nds32_r5; unsigned long nds32_r6; unsigned long nds32_r7; unsigned long nds32_r8; unsigned long nds32_r9; unsigned long nds32_r10; unsigned long nds32_r11; unsigned long nds32_r12; unsigned long nds32_r13; unsigned long nds32_r14; unsigned long nds32_r15; unsigned long nds32_r16; unsigned long nds32_r17; unsigned long nds32_r18; unsigned long nds32_r19; unsigned long nds32_r20; unsigned long nds32_r21; unsigned long nds32_r22; unsigned long nds32_r23; unsigned long nds32_r24; unsigned long nds32_r25; unsigned long nds32_fp; /* $r28 */ unsigned long nds32_gp; /* $r29 */ unsigned long nds32_lp; /* $r30 */ unsigned long nds32_sp; /* $r31 */ unsigned long nds32_ipc; unsigned long fault_address; unsigned long used_math_flag; /* FPU Registers */ struct fpu_struct fpu; struct zol_struct zol; }; #endif