| 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_types.h> |
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| 26 | |
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| 27 | ///////////////////////////////////////////// |
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| 28 | inline void hal_disable_irq( uint32_t * old ) |
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| 29 | { |
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| 30 | register unsigned int sr; |
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| 31 | |
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| 32 | __asm__ volatile |
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| 33 | (".set noat \n" |
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| 34 | ".set noreorder \n" |
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| 35 | "mfc0 $1, $12 \n" |
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| 36 | "nop \n" |
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| 37 | ".set reorder \n" |
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| 38 | "or %0, $0, $1 \n" |
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| 39 | "srl $1, $1, 1 \n" |
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| 40 | "sll $1, $1, 1 \n" |
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| 41 | "mtc0 $1, $12 \n" |
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| 42 | ".set at \n" |
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| 43 | : "=&r" (sr)); |
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| 44 | |
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| 45 | if( old ) *old = sr; |
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| 46 | } |
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| 47 | |
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| 48 | //////////////////////////////////////////// |
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| 49 | inline void hal_enable_irq( uint32_t * old ) |
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| 50 | { |
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| 51 | register unsigned int sr; |
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| 52 | |
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| 53 | __asm__ volatile |
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| 54 | (".set noat \n" |
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| 55 | ".set noreorder \n" |
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| 56 | "mfc0 $1, $12 \n" |
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| 57 | "nop \n" |
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| 58 | "or %0, $0, $1 \n" |
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| 59 | "ori $1, $1, 0x1 \n" |
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| 60 | "mtc0 $1, $12 \n" |
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| 61 | "nop \n" |
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| 62 | ".set reorder \n" |
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| 63 | ".set at \n" |
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| 64 | : "=&r" (sr)); |
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| 65 | |
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| 66 | if( old ) *old = sr; |
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| 67 | } |
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| 68 | |
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| 69 | /////////////////////////////////////////// |
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| 70 | inline void hal_restore_irq( uint32_t old ) |
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| 71 | { |
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| 72 | __asm__ volatile |
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| 73 | (".set noat \n" |
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| 74 | ".set noreorder \n" |
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| 75 | "mfc0 $1, $12 \n" |
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| 76 | "ori $2, $0, 0xFF \n" |
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| 77 | "and $2, $2, %0 \n" |
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| 78 | "or $1, $1, $2 \n" |
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| 79 | "mtc0 $1, $12 \n" |
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| 80 | ".set reorder \n" |
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| 81 | ".set at \n" |
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| 82 | : : "r" (old) : "$2"); |
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| 83 | } |
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| 84 | |
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