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/****************************************************************************
* arch/z16f/irq.h
* arch/chip/irq.h
*
* Copyright (C) 2008, 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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.
*
****************************************************************************/
/* This file should never be included directed but, rather,
* only indirectly through nuttx/irq.h (via arch/irq.h)
*/
#ifndef __ARCH_Z16F_IRQ_H
#define __ARCH_Z16F_IRQ_H
/****************************************************************************
* Included Files
****************************************************************************/
#ifndef __ASSEMBLY__
# include <stdint.h>
#endif
/****************************************************************************
* Definitions
****************************************************************************/
/* Interrupt Vectors (excluding reset and sysexec which are handled differently) */
#define Z16F_IRQ_IRQ0 ( 0) /* First of 8 IRQs controlled by IRQ0 registers */
#define Z16F_IRQ_ADC ( 0) /* Vector: 0x2C IRQ0.0 ADC */
#define Z16F_IRQ_SPI ( 1) /* Vector: 0x28 IRQ0.1 SPI */
#define Z16F_IRQ_I2C ( 2) /* Vector: 0x24 IRQ0.2 I2C */
#define Z16F_IRQ_UART0TX ( 3) /* Vector: 0x20 IRQ0.3 UART0 TX */
#define Z16F_IRQ_UART0RX ( 4) /* Vector: 0x1C IRQ0.4 UART0 RX */
#define Z16F_IRQ_TIMER0 ( 5) /* Vector: 0x18 IRQ0.5 Timer 0 */
#define Z16F_IRQ_TIMER1 ( 6) /* Vector: 0x14 IRQ0.6 Timer 1 */
#define Z16F_IRQ_TIMER2 ( 7) /* Vector: 0x10 IRQ0.7 Timer 2 */
#define Z16F_IRQ_IRQ1 ( 8) /* First of 8 IRQs controlled by IRQ1 registers */
#define Z16F_IRQ_P0AD ( 8) /* Vector: 0x4C IRQ1.0 Port A/D0, rising/falling edge */
#define Z16F_IRQ_P1AD ( 9) /* Vector: 0x48 IRQ1.1 Port A/D1, rising/falling edge */
#define Z16F_IRQ_P2AD (10) /* Vector: 0x44 IRQ1.2 Port A/D2, rising/falling edge */
#define Z16F_IRQ_P3AD (11) /* Vector: 0x40 IRQ1.3 Port A/D3, rising/falling edge */
#define Z16F_IRQ_P4AD (12) /* Vector: 0x3C IRQ1.4 Port A/D4, rising/falling edge */
#define Z16F_IRQ_P5AD (13) /* Vector: 0x38 IRQ1.5 Port A/D5, rising/falling edge */
#define Z16F_IRQ_P6AD (14) /* Vector: 0x34 IRQ1.6 Port A/D6, rising/falling edge */
#define Z16F_IRQ_P7AD (15) /* Vector: 0x30 IRQ1.7 Port A/D7, rising/falling edge */
#define Z16F_IRQ_IRQ2 (16) /* First of 8 IRQs controlled by IRQ2 registers */
#define Z16F_IRQ_C0 (16) /* Vector: IRQ2.0 0x6C Port C0, both edges DMA0 */
#define Z16F_IRQ_C1 (17) /* Vector: IRQ2.1 0x68 Port C1, both edges DMA1 */
#define Z16F_IRQ_C2 (18) /* Vector: IRQ2.2 0x64 Port C2, both edges DMA2 */
#define Z16F_IRQ_C3 (19) /* Vector: IRQ2.3 0x60 Port C3, both edges DMA3 */
#define Z16F_IRQ_PWMFAULT (20) /* Vector: IRQ2.4 0x5C PWM Fault */
#define Z16F_IRQ_UART1TX (21) /* Vector: IRQ2.5 0x58 UART1 TX */
#define Z16F_IRQ_UART1RX (22) /* Vector: IRQ2.6 0x54 UART1 RX */
#define Z16F_IRQ_PWMTIMER (23) /* Vector: IRQ2.7 0x50 PWM Timer */
#define Z16F_IRQ_SYSTIMER Z16F_IRQ_TIMER0
#define NR_IRQS (24)
/* These macros will map an IRQ to a register bit position */
#define Z16F_IRQ0_BIT(i) (1 << ((i)-Z16F_IRQ_IRQ0))
#define Z16F_IRQ1_BIT(i) (1 << ((i)-Z16F_IRQ_IRQ1))
#define Z16F_IRQ2_BIT(i) (1 << ((i)-Z16F_IRQ_IRQ2))
/* IRQ Stack Frame Format
*
* This stack frame is created on each interrupt. These registers are stored
* in the TCB to many context switches.
*
* The following represent all of the "static" registers r8-r15. These
* are registers that whose value must be retained across function calls.
* These registers must be saved bothby interrupt handling context switch
* switch logic and also by user-initiated context switches.
*
* Registers are saved in the order consistent with pushmho <r8-r15>,
* that is with r15 pushed first and r8 push last. Since the z16f has
* a "push-down" stack, the registers will be "in order" in memory.
*/
#define REG_R8 ( 0) /* 32-bits: R8 */
#define REG_R9 ( 2) /* 32-bits: R9 */
#define REG_R10 ( 4) /* 32-bits: R10 */
#define REG_R11 ( 6) /* 32-bits: R11 */
#define REG_R12 ( 8) /* 32-bits: R12 */
#define REG_R13 (10) /* 32-bits: R13 */
/* The frame pointer and the SP at the point of task resumption must
* always be saved.
*/
#define REG_R14 (12) /* 32-bits: R14 = fp */
#define REG_FP REG_R14
#define REG_R15 (14) /* 32-bits: R15 = sp */
#define REG_SP REG_R15
/* The following represent all of the "volatile" registers r0-r7. These
* are registers that whose value need not be retained across function
* calls. These registers must be saved by interrupt handling context
* switch logic but not by user-initiated context switches.
*
* Registers are saved in the order consistent with pushmlo <r0-r7>,
* that is with r7 pushed first and r0 push last. Since the z16f has
* a "push-down" stack, the registers will be "in order" in memory.
*/
#define REG_R0 (16) /* 32-bits: R0 */
#define REG_R1 (18) /* 32-bits: R1 */
#define REG_R2 (20) /* 32-bits: R2 */
#define REG_R3 (22) /* 32-bits: R3 */
#define REG_R4 (24) /* 32-bits: R4 */
#define REG_R5 (26) /* 32-bits: R5 */
#define REG_R6 (28) /* 32-bits: R6 */
#define REG_R7 (30) /* 32-bits: R7 */
/* The following two offsets represent the state of the stack on entry
* into the interrupt handler:
*
* TOS[0] = PC[31:24]
* TOS[1] = PC[23:16]
* TOS[2] = PC[15:8]
* TOS[3] = PC[7:0]
* TOS[4] = 0
* TOS[5] = flags
*/
#define REG_PC (32) /* 32-bits: Return PC */
#define REG_FLAGS (34) /* 16-bits: Flags register (with 0x00 padding) */
#define XCPTCONTEXT_REGS (35)
#define XCPTCONTEXT_SIZE (2 * XCPTCONTEXT_REGS)
/****************************************************************************
* Public Types
****************************************************************************/
#ifndef __ASSEMBLY__
/* This is the type of the register save array */
typedef uint16_t chipreg_t;
/* This struct defines the way the registers are stored. */
struct xcptcontext
{
/* Register save area */
uint16_t regs[XCPTCONTEXT_REGS];
/* The following function pointer is non-zero if there
* are pending signals to be processed.
*/
#ifndef CONFIG_DISABLE_SIGNALS
CODE void *sigdeliver; /* Actual type is sig_deliver_t */
/* The following retains that state during signal execution */
uint32_t saved_pc; /* Saved return address */
uint16_t saved_i; /* Saved interrupt state */
#endif
};
#endif
/* The ZDS-II provides built-in operations to test & disable and to restore
* the interrupt state.
*
* irqstate_t irqsave(void);
* void irqrestore(irqstate_t flags);
*/
#ifdef __ZILOG__
# define irqsave() TDI()
# define irqrestore(f) RI(f)
#endif
/****************************************************************************
* Inline functions
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/* ZDS-II intrinsic functions (normally declared in zneo.h) */
EXTERN intrinsic void EI(void);
EXTERN intrinsic void DI(void);
EXTERN intrinsic void RI(unsigned short);
EXTERN intrinsic void SET_VECTOR(int,void (* func) (void));
EXTERN intrinsic unsigned short TDI(void);
#ifndef __ZILOG__
EXTERN irqstate_t irqsave(void);
EXTERN void irqrestore(irqstate_t flags);
#endif
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif
#endif /* __ARCH_Z16F_IRQ_H */
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