| 1 | /*
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| 2 | * Copyright (c) 2013 Jakub Klama
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup genarch
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | * @brief Gaisler GRLIB interrupt controller.
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| 35 | */
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| 36 |
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| 37 | #include <genarch/drivers/grlib/irqmp.h>
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| 38 | #include <arch/arch.h>
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| 39 | #include <arch/asm.h>
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| 40 | #include <mm/km.h>
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| 41 |
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| 42 | void grlib_irqmp_init(grlib_irqmp_t *irqc, bootinfo_t *bootinfo)
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| 43 | {
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| 44 | irqc->regs = (void *) km_map(bootinfo->intc_base, PAGE_SIZE,
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| 45 | PAGE_NOT_CACHEABLE);
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| 46 |
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| 47 | /* Clear all pending interrupts */
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| 48 | pio_write_32(&irqc->regs->clear, 0xffffffff);
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| 49 |
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| 50 | /* Mask all interrupts */
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| 51 | pio_write_32((void *) irqc->regs + GRLIB_IRQMP_MASK_OFFSET, 0);
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| 52 | }
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| 53 |
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| 54 | int grlib_irqmp_inum_get(grlib_irqmp_t *irqc)
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| 55 | {
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| 56 | uint32_t pending = pio_read_32(&irqc->regs->pending);
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| 57 |
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| 58 | for (unsigned int i = 1; i < 16; i++) {
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| 59 | if (pending & (1 << i))
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| 60 | return i;
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| 61 | }
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| 62 |
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| 63 | return -1;
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| 64 | }
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| 65 |
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| 66 | void grlib_irqmp_clear(grlib_irqmp_t *irqc, unsigned int inum)
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| 67 | {
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| 68 | pio_write_32(&irqc->regs->clear, (1 << inum));
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| 69 | }
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| 70 |
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| 71 | void grlib_irqmp_mask(grlib_irqmp_t *irqc, unsigned int src)
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| 72 | {
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| 73 | uint32_t mask = pio_read_32((void *) irqc->regs +
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| 74 | GRLIB_IRQMP_MASK_OFFSET);
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| 75 |
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| 76 | mask &= ~(1 << src);
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| 77 | pio_write_32((void *) irqc->regs + GRLIB_IRQMP_MASK_OFFSET, mask);
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| 78 | }
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| 79 |
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| 80 | void grlib_irqmp_unmask(grlib_irqmp_t *irqc, unsigned int src)
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| 81 | {
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| 82 | uint32_t mask = pio_read_32((void *) irqc->regs +
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| 83 | GRLIB_IRQMP_MASK_OFFSET);
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| 84 |
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| 85 | mask |= (1 << src);
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| 86 | pio_write_32((void *) irqc->regs + GRLIB_IRQMP_MASK_OFFSET, mask);
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| 87 | }
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| 88 |
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| 89 | /** @}
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| 90 | */
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