1/* c-isr library stuff of Andes NDS32 cpu for GNU compiler 2 Copyright (C) 2012-2015 Free Software Foundation, Inc. 3 Contributed by Andes Technology Corporation. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 15 License for more details. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. */ 25 26#include "save_mac_regs.inc" 27#include "save_fpu_regs.inc" 28#include "save_fpu_regs_00.inc" 29#include "save_fpu_regs_01.inc" 30#include "save_fpu_regs_02.inc" 31#include "save_fpu_regs_03.inc" 32#include "save_all.inc" 33#include "save_partial.inc" 34#include "adj_intr_lvl.inc" 35#include "restore_mac_regs.inc" 36#include "restore_fpu_regs_00.inc" 37#include "restore_fpu_regs_01.inc" 38#include "restore_fpu_regs_02.inc" 39#include "restore_fpu_regs_03.inc" 40#include "restore_fpu_regs.inc" 41#include "restore_all.inc" 42#include "restore_partial.inc" 43 .section .nds32_isr, "ax" /* Put it in the section of 1st level handler. */ 44 .align 1 45/* 46 First Level Handlers 47 1. First Level Handlers are invokded in vector section via jump instruction 48 with specific names for different configurations. 49 2. Naming Format: _nds32_e_SR_NT for exception handlers. 50 _nds32_i_SR_NT for interrupt handlers. 51 2.1 All upper case letters are replaced with specific lower case letters encodings. 52 2.2 SR: Saved Registers 53 sa: Save All regs (context) 54 ps: Partial Save (all caller-saved regs) 55 2.3 NT: Nested Type 56 ns: nested 57 nn: not nested 58 nr: nested ready 59*/ 60 61/* 62 This is original 16-byte vector size version. 63*/ 64#ifdef NDS32_SAVE_ALL_REGS 65#if defined(NDS32_NESTED) 66 .globl _nds32_e_sa_ns 67 .type _nds32_e_sa_ns, @function 68_nds32_e_sa_ns: 69#elif defined(NDS32_NESTED_READY) 70 .globl _nds32_e_sa_nr 71 .type _nds32_e_sa_nr, @function 72_nds32_e_sa_nr: 73#else /* Not nested handler. */ 74 .globl _nds32_e_sa_nn 75 .type _nds32_e_sa_nn, @function 76_nds32_e_sa_nn: 77#endif /* endif for Nest Type */ 78#else /* not NDS32_SAVE_ALL_REGS */ 79#if defined(NDS32_NESTED) 80 .globl _nds32_e_ps_ns 81 .type _nds32_e_ps_ns, @function 82_nds32_e_ps_ns: 83#elif defined(NDS32_NESTED_READY) 84 .globl _nds32_e_ps_nr 85 .type _nds32_e_ps_nr, @function 86_nds32_e_ps_nr: 87#else /* Not nested handler. */ 88 .globl _nds32_e_ps_nn 89 .type _nds32_e_ps_nn, @function 90_nds32_e_ps_nn: 91#endif /* endif for Nest Type */ 92#endif /* not NDS32_SAVE_ALL_REGS */ 93 94/* 95 This is 16-byte vector size version. 96 The vector id was restored into $r0 in vector by compiler. 97*/ 98#ifdef NDS32_SAVE_ALL_REGS 99 SAVE_ALL 100#else 101 SAVE_PARTIAL 102#endif 103 /* Prepare to call 2nd level handler. */ 104 la $r2, _nds32_jmptbl_00 105 lw $r2, [$r2 + $r0 << #2] 106 ADJ_INTR_LVL /* Adjust INTR level. $r3 is clobbered. */ 107 jral $r2 108 /* Restore used registers. */ 109#ifdef NDS32_SAVE_ALL_REGS 110 RESTORE_ALL 111#else 112 RESTORE_PARTIAL 113#endif 114 iret 115 116#ifdef NDS32_SAVE_ALL_REGS 117#if defined(NDS32_NESTED) 118 .size _nds32_e_sa_ns, .-_nds32_e_sa_ns 119#elif defined(NDS32_NESTED_READY) 120 .size _nds32_e_sa_nr, .-_nds32_e_sa_nr 121#else /* Not nested handler. */ 122 .size _nds32_e_sa_nn, .-_nds32_e_sa_nn 123#endif /* endif for Nest Type */ 124#else /* not NDS32_SAVE_ALL_REGS */ 125#if defined(NDS32_NESTED) 126 .size _nds32_e_ps_ns, .-_nds32_e_ps_ns 127#elif defined(NDS32_NESTED_READY) 128 .size _nds32_e_ps_nr, .-_nds32_e_ps_nr 129#else /* Not nested handler. */ 130 .size _nds32_e_ps_nn, .-_nds32_e_ps_nn 131#endif /* endif for Nest Type */ 132#endif /* not NDS32_SAVE_ALL_REGS */ 133