156 lines
4.4 KiB
C
156 lines
4.4 KiB
C
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/************************************************************
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* irq.h
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 Gregory Nutt 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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/* This file should never be included directed but, rather,
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* only indirectly through nuttx/irq.h
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*/
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#ifndef __ARCH_IRQ_H
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#define __ARCH_IRQ_H
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/************************************************************
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* Included Files
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************************************************************/
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/************************************************************
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* Definitions
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************************************************************/
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#define EXT_INT0_IRQ 0
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#define TIMER0_IRQ 1
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#define EXT_INT1_IRQ 2
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#define TIMER1_IRQ 3
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#define UART_IRQ 4
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#define TIMER2_IRQ 5
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#define NR_IRQS 6
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/* The stack for all tasks/threads lie at the same position
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* in IRAM. On context switches, the STACK contents will be
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* copied into the TCB.
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*/
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#define IRAM_BASE 0x0000
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#define IRAM_SIZE 0x0100
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#define STACK_BASE 0x0030
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#define STACK_SIZE (IRAM_SIZE - STACK_BASE)
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/* This is the form of initial stack frame
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*
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* This initial stack frame will be configured to hold.
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* (1) The 16-bit return address of either:
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*
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* void task_start(void);
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* void pthread_start(void)
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*
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* The return address is stored at the top of stack.
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* so that the RETI instruction will work:
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*
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* PC15-8 <- ((SP))
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* (SP) <- (SP) -1
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* PC7-0 <- ((SP))
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* (SP) <- (SP) -1
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*/
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#define FRAME_RETLS 0
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#define FRAME_RETMS 1
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/* Then a full context save area which can be indexed with
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* the following definitions (relative to the beginning of
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* the initial frame.
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*/
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#define FRAME_ACC 2
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#define FRAME_IE 3
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#define FRAME_DPL 4
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#define FRAME_DPH 5
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#define FRAME_B 6
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#define FRAME_R2 7
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#define FRAME_R3 8
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#define FRAME_R4 9
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#define FRAME_R5 10
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#define FRAME_R6 11
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#define FRAME_R7 12
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#define FRAME_R0 13
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#define FRAME_R1 14
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#define FRAME_PSW 15
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#define FRAME_BP 16
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#define FRAME_SIZE 17
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/************************************************************
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* Public Types
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************************************************************/
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/* This struct defines the way the registers are stored */
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#ifndef __ASSEMBLY__
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struct xcptcontext
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{
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ubyte nbytes;
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ubyte stack[STACK_SIZE];
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};
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#endif /* __ASSEMBLY */
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/************************************************************
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* Public Variables
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************************************************************/
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/************************************************************
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* Public Function Prototypes
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************************************************************/
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#ifndef __ASSEMBLY__
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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EXTERN irqstate_t irqsave(void) __naked;
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EXTERN void irqrestore(irqstate_t flags) __naked;
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ASSEMBLY */
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#endif /* __ARCH_IRQ_H */
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