241 lines
8.6 KiB
C
241 lines
8.6 KiB
C
/****************************************************************************
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* arch/misoc/include/lm32/irq.h
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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* Ramtin Amin <keytwo@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __ARCH_MISOC_INCLUDE_LM32_IRQ_H
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#define __ARCH_MISOC_INCLUDE_LM32_IRQ_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <arch/types.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* 32 True interrupts plus the software interrupt */
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#define LM32_NINTERRUPTS 32
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#define LM32_IRQ_SWINT 32
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#define NR_IRQS 33
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/* Registers */
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#define REG_X0_NDX 0 /* Holds the value zero */
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#define REG_X1_NDX 1 /* General-purpose/argument 0/return value 0 */
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#define REG_X2_NDX 2 /* General-purpose/argument 1/return value 1 */
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#define REG_X3_NDX 3 /* General-purpose/argument 2 */
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#define REG_X4_NDX 4 /* General-purpose/argument 3 */
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#define REG_X5_NDX 5 /* General-purpose/argument 4 */
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#define REG_X6_NDX 6 /* General-purpose/argument 5 */
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#define REG_X7_NDX 7 /* General-purpose/argument 6 */
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#define REG_X8_NDX 8 /* General-purpose/argument 7 */
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#define REG_X9_NDX 9 /* General-purpose */
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#define REG_X10_NDX 10 /* General-purpose */
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#define REG_X11_NDX 11 /* General-purpose */
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#define REG_X12_NDX 12 /* General-purpose */
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#define REG_X13_NDX 13 /* General-purpose */
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#define REG_X14_NDX 14 /* General-purpose */
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#define REG_X15_NDX 15 /* General-purpose */
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#define REG_X16_NDX 16 /* General-purpose */
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#define REG_X17_NDX 17 /* General-purpose */
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#define REG_X18_NDX 18 /* General-purpose */
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#define REG_X19_NDX 19 /* General-purpose */
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#define REG_X20_NDX 20 /* General-purpose */
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#define REG_X21_NDX 21 /* General-purpose */
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#define REG_X22_NDX 22 /* General-purpose */
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#define REG_X23_NDX 23 /* General-purpose */
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#define REG_X24_NDX 24 /* General-purpose */
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#define REG_X25_NDX 25 /* General-purpose */
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#define REG_X26_NDX 26 /* General-purpose/global pointer */
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#define REG_X27_NDX 27 /* General-purpose/frame pointer */
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#define REG_X28_NDX 28 /* Stack pointer */
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#define REG_X29_NDX 29 /* General-purpose/return address */
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#define REG_X30_NDX 30 /* Exception address */
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#define REG_X31_NDX 31 /* Breakpoint address */
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#define REG_X32_NDX 32 /* Reg IE */
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/* Interrupt Context register */
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#define XCPTCONTEXT_REGS 33
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#define XCPTCONTEXT_SIZE (4 * XCPTCONTEXT_REGS)
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#ifdef __ASSEMBLY__
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# define REG_X0 (4*REG_X0_NDX)
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# define REG_X1 (4*REG_X1_NDX)
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# define REG_X2 (4*REG_X2_NDX)
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# define REG_X3 (4*REG_X3_NDX)
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# define REG_X4 (4*REG_X4_NDX)
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# define REG_X5 (4*REG_X5_NDX)
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# define REG_X6 (4*REG_X6_NDX)
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# define REG_X7 (4*REG_X7_NDX)
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# define REG_X8 (4*REG_X8_NDX)
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# define REG_X9 (4*REG_X9_NDX)
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# define REG_X10 (4*REG_X10_NDX)
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# define REG_X11 (4*REG_X11_NDX)
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# define REG_X12 (4*REG_X12_NDX)
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# define REG_X13 (4*REG_X13_NDX)
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# define REG_X14 (4*REG_X14_NDX)
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# define REG_X15 (4*REG_X15_NDX)
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# define REG_X16 (4*REG_X16_NDX)
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# define REG_X17 (4*REG_X17_NDX)
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# define REG_X18 (4*REG_X18_NDX)
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# define REG_X19 (4*REG_X19_NDX)
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# define REG_X20 (4*REG_X20_NDX)
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# define REG_X21 (4*REG_X21_NDX)
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# define REG_X22 (4*REG_X22_NDX)
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# define REG_X23 (4*REG_X23_NDX)
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# define REG_X24 (4*REG_X24_NDX)
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# define REG_X25 (4*REG_X25_NDX)
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# define REG_X26 (4*REG_X26_NDX)
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# define REG_X27 (4*REG_X27_NDX)
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# define REG_X28 (4*REG_X28_NDX)
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# define REG_X29 (4*REG_X29_NDX)
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# define REG_X30 (4*REG_X30_NDX)
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# define REG_X31 (4*REG_X31_NDX)
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# define REG_INT_CTX (4*REG_X32_NDX)
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#else
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# define REG_X0 REG_X0_NDX
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# define REG_X1 REG_X1_NDX
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# define REG_X2 REG_X2_NDX
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# define REG_X3 REG_X3_NDX
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# define REG_X4 REG_X4_NDX
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# define REG_X5 REG_X5_NDX
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# define REG_X6 REG_X6_NDX
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# define REG_X7 REG_X7_NDX
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# define REG_X8 REG_X8_NDX
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# define REG_X9 REG_X9_NDX
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# define REG_X10 REG_X10_NDX
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# define REG_X11 REG_X11_NDX
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# define REG_X12 REG_X12_NDX
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# define REG_X13 REG_X13_NDX
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# define REG_X14 REG_X14_NDX
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# define REG_X15 REG_X15_NDX
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# define REG_X16 REG_X16_NDX
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# define REG_X17 REG_X17_NDX
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# define REG_X18 REG_X18_NDX
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# define REG_X19 REG_X19_NDX
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# define REG_X20 REG_X20_NDX
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# define REG_X21 REG_X21_NDX
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# define REG_X22 REG_X22_NDX
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# define REG_X23 REG_X23_NDX
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# define REG_X24 REG_X24_NDX
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# define REG_X25 REG_X25_NDX
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# define REG_X26 REG_X26_NDX
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# define REG_X27 REG_X27_NDX
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# define REG_X28 REG_X28_NDX
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# define REG_X29 REG_X29_NDX
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# define REG_X30 REG_X30_NDX
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# define REG_X31 REG_X31_NDX
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# define REG_INT_CTX REG_X32_NDX
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#endif
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/* Register aliases */
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#define REG_GP REG_X26
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#define REG_FP REG_X27
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#define REG_SP REG_X28
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#define REG_RA REG_X29
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#define REG_EA REG_X30
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#define REG_BA REG_X31
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#define REG_EPC REG_X30
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#define REG_A0 REG_X1
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#define REG_A1 REG_X2
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#define REG_A2 REG_X3
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#define REG_A3 REG_X4
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#define REG_A4 REG_X5
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#define REG_A5 REG_X6
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#define REG_A6 REG_X7
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#define REG_A7 REG_X8
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#define REG_IE REG_INT_CTX
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifndef __ASSEMBLY__
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struct xcptcontext
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{
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/* The following function pointer is non-NULL if there are pending signals
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* to be processed.
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*/
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void *sigdeliver; /* Actual type is sig_deliver_t */
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/* These additional register save locations are used to implement the
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* signal delivery trampoline.
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*
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* REVISIT: Because there is only one copy of these save areas,
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* only a single signal handler can be active. This precludes
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* queuing of signal actions. As a result, signals received while
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* another signal handler is executing will be ignored!
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*/
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uint32_t saved_epc; /* Trampoline PC */
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uint32_t saved_int_ctx; /* Interrupt context with interrupts disabled. */
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#ifdef CONFIG_BUILD_KERNEL
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/* This is the saved address to use when returning from a user-space
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* signal handler.
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*/
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uint32_t sigreturn;
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#endif
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#ifdef CONFIG_BUILD_KERNEL
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/* The following array holds information needed to return from each nested
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* system call.
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*/
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uint8_t nsyscalls;
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struct xcpt_syscall_s syscall[CONFIG_SYS_NNEST];
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#endif
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/* Register save area */
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uint32_t regs[XCPTCONTEXT_REGS];
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};
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_MISOC_INCLUDE_LM32_IRQ_H */
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