| 1 | /* |
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| 2 | * hal_irqmask.c - implementation of Generic IRQ Masking API for TSAR-MIPS32 |
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| 3 | * |
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| 4 | * Author Ghassan Almaless (2008,2009,2010,2011,2012) |
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| 5 | * Alain Greiner (2016) |
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| 6 | * |
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| 7 | * Copyright (c) UPMC Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH.. |
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| 10 | * |
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| 11 | * ALMOS-MKH. is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH. is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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| 25 | #include <hal_kernel_types.h> |
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| 26 | #include <hal_shared_types.h> |
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| 27 | |
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| 28 | ////////////////////////////////////////// |
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| 29 | inline void hal_disable_irq( reg_t * old ) |
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| 30 | { |
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| 31 | register uint32_t sr; |
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| 32 | |
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| 33 | __asm__ volatile |
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| 34 | (".set noat \n" |
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| 35 | "mfc0 $1, $12 \n" |
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| 36 | "or %0, $0, $1 \n" |
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| 37 | "srl $1, $1, 1 \n" |
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| 38 | "sll $1, $1, 1 \n" |
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| 39 | "mtc0 $1, $12 \n" |
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| 40 | ".set at \n" |
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| 41 | : "=&r" (sr) ); |
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| 42 | |
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| 43 | if( old ) *old = sr; |
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| 44 | } |
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| 45 | |
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| 46 | ///////////////////////////////////////// |
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| 47 | inline void hal_enable_irq( reg_t * old ) |
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| 48 | { |
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| 49 | register uint32_t sr; |
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| 50 | |
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| 51 | __asm__ volatile |
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| 52 | (".set noat \n" |
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| 53 | "mfc0 $1, $12 \n" |
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| 54 | "or %0, $0, $1 \n" |
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| 55 | "ori $1, $1, 0xFF01 \n" |
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| 56 | "mtc0 $1, $12 \n" |
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| 57 | ".set at \n" |
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| 58 | : "=&r" (sr) ); |
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| 59 | |
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| 60 | if( old ) *old = sr; |
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| 61 | } |
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| 62 | |
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| 63 | //////////////////////////////////////// |
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| 64 | inline void hal_restore_irq( reg_t old ) |
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| 65 | { |
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| 66 | __asm__ volatile |
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| 67 | ( "mtc0 %0, $12" : : "r" (old) ); |
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| 68 | } |
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| 69 | |
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| 70 | |
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