diff options
Diffstat (limited to 'nuttx/arch/z16/src/z16f/z16f_irq.c')
| -rw-r--r-- | nuttx/arch/z16/src/z16f/z16f_irq.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/nuttx/arch/z16/src/z16f/z16f_irq.c b/nuttx/arch/z16/src/z16f/z16f_irq.c new file mode 100644 index 000000000..f5335af15 --- /dev/null +++ b/nuttx/arch/z16/src/z16f/z16f_irq.c @@ -0,0 +1,197 @@ +/**************************************************************************** + * z16f/z16f_irq.c + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 NuttX 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 OWNER 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <nuttx/irq.h> + +#include "chip/chip.h" +#include "os_internal.h" +#include "up_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_irqinitialize + ****************************************************************************/ + +void up_irqinitialize(void) +{ + /* Clear and disable all interrupts. Set all to priority 0. */ + + putreg8(0xff, Z16F_IRQ0); + putreg8(0xff, Z16F_IRQ1); + putreg8(0xff, Z16F_IRQ2); + + putreg16(0x0000, Z16F_IRQ0_EN); + putreg16(0x0000, Z16F_IRQ1_EN); + putreg16(0x0000, Z16F_IRQ2_EN); + + /* currents_regs is non-NULL only while processing an interrupt */ + + current_regs = NULL; + + /* And finally, enable interrupts */ + +#ifndef CONFIG_SUPPRESS_INTERRUPTS + EI(); +#endif +} + +/**************************************************************************** + * Name: up_disable_irq + * + * Description: + * Disable the IRQ specified by 'irq' + * + ****************************************************************************/ + +void up_disable_irq(int irq) +{ + /* System exceptions cannot be disabled */ + + if (irq >= Z16F_IRQ_IRQ0) + { + /* Disable the interrupt by clearing the corresponding bit in the + * appropriate IRQ enable register. + */ + + if (irq < Z16F_IRQ_IRQ1) + { + putreg8((getreg8(Z16F_IRQ0_ENH) & ~Z16_IRQ0_BIT(irq)), Z16F_IRQ0_ENH); + } + else if (irq < Z16F_IRQ_IRQ2) + { + putreg8((getreg8(Z16F_IRQ1_ENH) & ~Z16_IRQ1_BIT(irq)), Z16F_IRQ1_ENH); + } + else if (irq < NR_IRQS) + { + putreg8((getreg8(Z16F_IRQ2_ENH) & ~Z16_IRQ2_BIT(irq)), Z16F_IRQ2_ENH); + } + } +} + +/**************************************************************************** + * Name: up_enable_irq + * + * Description: + * Enable the IRQ specified by 'irq' + * + ****************************************************************************/ + +void up_enable_irq(int irq) +{ + /* System exceptions cannot be disabled */ + + if (irq >= Z16F_IRQ_IRQ0) + { + /* Enable the interrupt by setting the corresponding bit in the + * appropriate IRQ enable register. + */ + + if (irq < Z16F_IRQ_IRQ1) + { + putreg8((getreg8(Z16F_IRQ0_ENH) | Z16_IRQ0_BIT(irq)), Z16F_IRQ0_ENH); + } + else if (irq < Z16F_IRQ_IRQ2) + { + putreg8((getreg8(Z16F_IRQ1_ENH) | Z16_IRQ1_BIT(irq)), Z16F_IRQ1_ENH); + } + else if (irq < NR_IRQS) + { + putreg8((getreg8(Z16F_IRQ2_ENH) | Z16_IRQ2_BIT(irq)), Z16F_IRQ2_ENH); + } + } +} + +/**************************************************************************** + * Name: up_maskack_irq + * + * Description: + * Mask the IRQ and acknowledge it + * + ****************************************************************************/ + +void up_maskack_irq(int irq) +{ + /* System exceptions cannot be disabled or acknowledged */ + + if (irq >= Z16F_IRQ_IRQ0) + { + /* Disable the interrupt by clearing the corresponding bit in the + * appropriate IRQ enable register and acknowledge it by setting the + * corresponding bit in the IRQ status register. + */ + + if (irq < Z16F_IRQ_IRQ1) + { + putreg8((getreg8(Z16F_IRQ0_ENH) & ~Z16_IRQ0_BIT(irq)), Z16F_IRQ0_ENH); + putreg8(Z16_IRQ0_BIT(irq), Z16F_IRQ0); + } + else if (irq < Z16F_IRQ_IRQ2) + { + putreg8((getreg8(Z16F_IRQ1_ENH) & ~Z16_IRQ1_BIT(irq)), Z16F_IRQ1_ENH); + putreg8(Z16_IRQ1_BIT(irq), Z16F_IRQ2); + } + else if (irq < NR_IRQS) + { + putreg8((getreg8(Z16F_IRQ2_ENH) & ~Z16_IRQ2_BIT(irq)), Z16F_IRQ2_ENH); + putreg8(Z16_IRQ2_BIT(irq), Z16F_IRQ2); + } + } +} |