| Chris Zankel | c658eac | 2008-02-12 13:17:07 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * This header file contains assembly-language definitions (assembly |
| 3 | * macros, etc.) for this specific Xtensa processor's TIE extensions |
| 4 | * and options. It is customized to this Xtensa processor configuration. |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file "COPYING" in the main directory of this archive |
| 8 | * for more details. |
| 9 | * |
| 10 | * Copyright (C) 1999-2008 Tensilica Inc. |
| 11 | */ |
| 12 | |
| 13 | #ifndef _XTENSA_CORE_TIE_ASM_H |
| 14 | #define _XTENSA_CORE_TIE_ASM_H |
| 15 | |
| 16 | /* Selection parameter values for save-area save/restore macros: */ |
| 17 | /* Option vs. TIE: */ |
| 18 | #define XTHAL_SAS_TIE 0x0001 /* custom extension or coprocessor */ |
| 19 | #define XTHAL_SAS_OPT 0x0002 /* optional (and not a coprocessor) */ |
| 20 | /* Whether used automatically by compiler: */ |
| 21 | #define XTHAL_SAS_NOCC 0x0004 /* not used by compiler w/o special opts/code */ |
| 22 | #define XTHAL_SAS_CC 0x0008 /* used by compiler without special opts/code */ |
| 23 | /* ABI handling across function calls: */ |
| 24 | #define XTHAL_SAS_CALR 0x0010 /* caller-saved */ |
| 25 | #define XTHAL_SAS_CALE 0x0020 /* callee-saved */ |
| 26 | #define XTHAL_SAS_GLOB 0x0040 /* global across function calls (in thread) */ |
| 27 | /* Misc */ |
| 28 | #define XTHAL_SAS_ALL 0xFFFF /* include all default NCP contents */ |
| 29 | |
| 30 | |
| 31 | |
| 32 | /* Macro to save all non-coprocessor (extra) custom TIE and optional state |
| 33 | * (not including zero-overhead loop registers). |
| 34 | * Save area ptr (clobbered): ptr (1 byte aligned) |
| 35 | * Scratch regs (clobbered): at1..at4 (only first XCHAL_NCP_NUM_ATMPS needed) |
| 36 | */ |
| 37 | .macro xchal_ncp_store ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL |
| 38 | xchal_sa_start \continue, \ofs |
| 39 | .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select |
| 40 | xchal_sa_align \ptr, 0, 1024-4, 4, 4 |
| 41 | rur \at1, THREADPTR // threadptr option |
| 42 | s32i \at1, \ptr, .Lxchal_ofs_ + 0 |
| 43 | .set .Lxchal_ofs_, .Lxchal_ofs_ + 4 |
| 44 | .endif |
| 45 | .endm // xchal_ncp_store |
| 46 | |
| 47 | /* Macro to save all non-coprocessor (extra) custom TIE and optional state |
| 48 | * (not including zero-overhead loop registers). |
| 49 | * Save area ptr (clobbered): ptr (1 byte aligned) |
| 50 | * Scratch regs (clobbered): at1..at4 (only first XCHAL_NCP_NUM_ATMPS needed) |
| 51 | */ |
| 52 | .macro xchal_ncp_load ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL |
| 53 | xchal_sa_start \continue, \ofs |
| 54 | .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~\select |
| 55 | xchal_sa_align \ptr, 0, 1024-4, 4, 4 |
| 56 | l32i \at1, \ptr, .Lxchal_ofs_ + 0 |
| 57 | wur \at1, THREADPTR // threadptr option |
| 58 | .set .Lxchal_ofs_, .Lxchal_ofs_ + 4 |
| 59 | .endif |
| 60 | .endm // xchal_ncp_load |
| 61 | |
| 62 | |
| 63 | |
| 64 | #define XCHAL_NCP_NUM_ATMPS 1 |
| 65 | |
| 66 | |
| 67 | #define XCHAL_SA_NUM_ATMPS 1 |
| 68 | |
| 69 | #endif /*_XTENSA_CORE_TIE_ASM_H*/ |
| 70 | |