| /* |
| * Copyright 2015, Imagination Technologies Limited and/or its |
| * affiliated group companies. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holder nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| .set nomips16 |
| #include <mips/asm.h> |
| #include <mips/regdef.h> |
| #include <mips/m32c0.h> |
| #include <mips/hal.h> |
| #include <mips/endian.h> |
| |
| # |
| # FUNCTION: _xpa_save |
| # |
| # DESCRIPTION: save the XPA version of badvaddr. |
| # |
| # RETURNS: int |
| # |
| # 0: No context saved |
| # CTX_*: Type of conext stored |
| # |
| LEAF(_xpa_save) |
| PTR_S zero, LINKCTX_NEXT(a0) |
| # Test for LPA support |
| mfc0 t0, C0_CONFIG3 |
| ext t0, t0, CFG3_LPA_SHIFT, 1 |
| beqz t0, 1f |
| # Test for LPA enabled |
| mfc0 t0, C0_PAGEGRAIN |
| ext t0, t0, PAGEGRAIN_ELPA_SHIFT, PAGEGRAIN_ELPA_BITS |
| bnez t0, 2f |
| |
| # LPA either unavailable or not enabled |
| # return 0 |
| 1: move v0, zero |
| jr ra |
| |
| 2: lui v0, %hi(LINKCTX_TYPE_XPA) |
| addiu v0, v0, %lo(LINKCTX_TYPE_XPA) |
| mfc0 t0, C0_BADVADDR |
| .set push |
| .set mips32r5 |
| .set xpa |
| mfhc0 t1, C0_BADVADDR |
| .set pop |
| #if BYTE_ORDER == BIG_ENDIAN |
| sw t0, XPACTX_BADVADDR(a0) |
| sw t1, (XPACTX_BADVADDR+4)(a0) |
| #else /* BYTE ORDER == LITTLE_ENDIAN */ |
| sw t1, XPACTX_BADVADDR(a0) |
| sw t0, (XPACTX_BADVADDR+4)(a0) |
| #endif |
| REG_S v0, LINKCTX_ID(a0) |
| jr ra |
| END(_xpa_save) |
