From b1234a6bda32468937862ba9e9f74c0bd83e238a Mon Sep 17 00:00:00 2001 From: patacongo Date: Sun, 9 Mar 2008 19:56:37 +0000 Subject: [PATCH] EZ80 support git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@729 42af7a65-404d-4744-a932-0658087f49c3 --- arch/z80/include/ez80/arch.h | 77 ++++++++++ arch/z80/include/ez80/irq.h | 256 ++++++++++++++++++++++++++++++++++ arch/z80/include/ez80/types.h | 95 +++++++++++++ arch/z80/src/ez80/Make.defs | 49 +++++++ arch/z80/src/ez80/chip.h | 100 +++++++++++++ arch/z80/src/ez80/switch.h | 249 +++++++++++++++++++++++++++++++++ 6 files changed, 826 insertions(+) create mode 100644 arch/z80/include/ez80/arch.h create mode 100644 arch/z80/include/ez80/irq.h create mode 100644 arch/z80/include/ez80/types.h create mode 100644 arch/z80/src/ez80/Make.defs create mode 100644 arch/z80/src/ez80/chip.h create mode 100644 arch/z80/src/ez80/switch.h diff --git a/arch/z80/include/ez80/arch.h b/arch/z80/include/ez80/arch.h new file mode 100644 index 0000000000..2440c12e49 --- /dev/null +++ b/arch/z80/include/ez80/arch.h @@ -0,0 +1,77 @@ +/**************************************************************************** + * arch/ez80/arch.h + * arch/chip/arch.h + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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/arch.h (via arch/arch.h) + */ + +#ifndef __ARCH_EZ80_ARCH_H +#define __ARCH_EZ80_ARCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ARCH_EZ80_ARCH_H */ + diff --git a/arch/z80/include/ez80/irq.h b/arch/z80/include/ez80/irq.h new file mode 100644 index 0000000000..96cb54f08a --- /dev/null +++ b/arch/z80/include/ez80/irq.h @@ -0,0 +1,256 @@ +/**************************************************************************** + * arch/ez80/include/ez80/irq.h + * arch/chip/irq.h + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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_EZ80_IRQ_H +#define __ARCH_EZ80_IRQ_H + +#ifndef _EZ80F91 +# error "Only the EZ80F91 is currently supported" +#endif + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* ez80 Interrupt Numbers ***************************************************/ + +#define EZ80_EMACRX_IRQ (0) /* Vector 0x40 */ +#define EZ80_EMACTX_IRQ (1) /* Vector 0x44 */ +#define EZ80_EMACSYS_IRQ (2) /* Vector 0x48 */ +#define EZ80_PLL_IRQ (3) /* Vector 0x4c */ +#define EZ80_FLASH_IRQ (4) /* Vector 0x50 */ + +#define EZ80_TIMER0_IRQ (5) /* Vector Ox54 */ +#define EZ80_TIMER1_IRQ (6) /* Vector Ox58 */ +#define EZ80_TIMER2_IRQ (7) /* Vector Ox5c */ +#define EZ80_TIMER3_IRQ (8) /* Vector Ox60 */ + +#define EZ80_RTC_IRQ (9) /* Vector Ox6C */ +#define EZ80_UART0_IRQ (10) /* Vector Ox70 */ +#define EZ80_UART1_IRQ (11) /* Vector Ox74 */ + +#define EZ80_I2C_IRQ (12) /* Vector Ox78 */ +#define EZ80_SPI_IRQ (13) /* Vector Ox7c */ + +#define EZ80_PORTA0_IRQ (14) /* Vector Ox80 */ +#define EZ80_PORTA1_IRQ (15) /* Vector Ox84 */ +#define EZ80_PORTA2_IRQ (16) /* Vector Ox88 */ +#define EZ80_PORTA3_IRQ (17) /* Vector Ox8c */ +#define EZ80_PORTA4_IRQ (18) /* Vector Ox90 */ +#define EZ80_PORTA5_IRQ (19) /* Vector Ox94 */ +#define EZ80_PORTA6_IRQ (20) /* Vector Ox98 */ +#define EZ80_PORTA7_IRQ (21) /* Vector Ox9c */ + +#define EZ80_PORTB0_IRQ (22) /* Vector Oxa0 */ +#define EZ80_PORTB1_IRQ (23) /* Vector Oxa4 */ +#define EZ80_PORTB2_IRQ (24) /* Vector Oxa8 */ +#define EZ80_PORTB3_IRQ (25) /* Vector Oxac */ +#define EZ80_PORTB4_IRQ (26) /* Vector Oxb0 */ +#define EZ80_PORTB5_IRQ (27) /* Vector Oxb4 */ +#define EZ80_PORTB6_IRQ (28) /* Vector Oxb8 */ +#define EZ80_PORTB7_IRQ (29) /* Vector Oxbc */ + +#define EZ80_PORTC0_IRQ (30) /* Vector Oxc0 */ +#define EZ80_PORTC1_IRQ (31) /* Vector Oxc4 */ +#define EZ80_PORTC2_IRQ (32) /* Vector Oxc8 */ +#define EZ80_PORTC3_IRQ (33) /* Vector Oxcc */ +#define EZ80_PORTC4_IRQ (34) /* Vector Oxd0 */ +#define EZ80_PORTC5_IRQ (35) /* Vector Oxd4 */ +#define EZ80_PORTC6_IRQ (36) /* Vector Oxd8 */ +#define EZ80_PORTC7_IRQ (37) /* Vector Oxdc */ + +#define EZ80_PORTD0_IRQ (38) /* Vector Oxe0 */ +#define EZ80_PORTD1_IRQ (39) /* Vector Oxe4 */ +#define EZ80_PORTD2_IRQ (40) /* Vector Oxe8 */ +#define EZ80_PORTD3_IRQ (41) /* Vector Oxec */ +#define EZ80_PORTD4_IRQ (42) /* Vector Oxf0 */ +#define EZ80_PORTD5_IRQ (43) /* Vector Oxf4 */ +#define EZ80_PORTD6_IRQ (44) /* Vector Oxf8 */ +#define EZ80_PORTD7_IRQ (45) /* Vector Oxfc */ + +#define NR_IRQS (46) +#define EZ80_IRQ_SYSTIMER EZ80_TIMER0_IRQ + +/* IRQ Management Macros ****************************************************/ + +/* IRQ State Save Format **************************************************** + * + * These indices describe how the ez8 context is save in the state save array + * + * Byte offsets: + */ + +/* IRQ Stack Frame Format + * + * This stack frame is created on each interrupt. These registers are stored + * in the TCB to many context switches. + */ + +/* chipreg_t indices */ + +#define XCPT_I (0) /* Index 0: 16-bit interrupt vector register */ +#define XCPT_BC (1) /* Index 1: Saved 16-bit BC register */ +#define XCPT_DE (2) /* Index 2: Saved 16-bit DE register */ +#define XCPT_IX (3) /* Index 3: Saved 16-bit IX register */ +#define XCPT_IY (4) /* Index 4: Saved 16-bit IY register */ +#define XCPT_SP (5) /* Index 5: Saved 16-bit SP at time of interrupt */ +#define XCPT_HL (6) /* Index 6: Saved 16-bit HL register */ +#define XCPT_AF (7) /* Index 7: Saved 16-bit AF register */ +#define XCPT_PC (8) /* Index 8: Offset to 16-bit PC at time of interrupt */ +#define XCPTCONTEXT_REGS (9) + +#ifdef CONFIG_EZ80_Z80MODE +/* Byte offsets */ + +# define XCPT_I16_OFFSET (2*XCPT_I) /* Offset 0: 16-bit interrupt vector register */ +# define XCPT_I_OFFSET (2*XCPT_I+1) /* Offset 1: 8-bit interrupt vector register */ +# define XCPT_BC_OFFSET (2*XCPT_BC) /* Offset 2: Saved 16-bit BC register */ +# define XCPT_C_OFFSET (2*XCPT_BC+0) /* Offset 2: Saved 8-bit C register */ +# define XCPT_B_OFFSET (2*XCPT_BC+1) /* Offset 3: Saved 8-bit D register */ +# define XCPT_DE_OFFSET (2*XCPT_DE) /* Offset 4: Saved 16-bit DE register */ +# define XCPT_E_OFFSET (2*XCPT_DE+0) /* Offset 4: Saved 8-bit E register */ +# define XCPT_D_OFFSET (2*XCPT_DE+1) /* Offset 5: Saved 8-bit D register */ +# define XCPT_IX_OFFSET (2*XCPT_IX) /* Offset 6: Saved 16-bit IX register */ +# define XCPT_IY_OFFSET (2*XCPT_IY) /* Offset 8: Saved 16-bit IY register */ +# define XCPT_SP_OFFSET (2*XCPT_SP) /* Offset 10: Saved 16-bit SP at time of interrupt */ +# define XCPT_HL_OFFSET (2*XCPT_HL) /* Offset 12: Saved 16-bit HL register */ +# define XCPT_L_OFFSET (2*XCPT_HL+0) /* Offset 12: Saved 8-bit L register */ +# define XCPT_H_OFFSET (2*XCPT_HL+1) /* Offset 13: Saved 8-bit H register */ +# define XCPT_AF_OFFSET (2*XCPT_AF) /* Offset 14: Saved 16-bit AF register */ +# define XCPT_F_OFFSET (2*XCPT_AF+0) /* Offset 14: Saved flags */ +# define XCPT_A_OFFSET (2*XCPT_AF+1) /* Offset 15: Saved 8-bit A register */ +# define XCPT_PC_OFFSET (2*XCPT_PC) /* Offset 16: Offset to 16-bit PC at time of interrupt */ +# define XCPTCONTEXT_SIZE (2*XCPTCONTEXT_REGS) +#else +/* Byte offsets */ + +# define XCPT_I24_OFFSET (3*XCPT_I) /* Offset 0: Saved 24-bit interrupt vector register */ +# define XCPT_I_OFFSET (3*XCPT_I+2) /* Offset 2: Saved 8-bit interrupt vector register */ +# define XCPT_BC_OFFSET (3*XCPT_BC) /* Offset 3: Saved 24-bit BC register */ +# define XCPT_C_OFFSET (3*XCPT_BC+1) /* Offset 4: Saved 8-bit C register */ +# define XCPT_B_OFFSET (3*XCPT_BC+2) /* Offset 5: Saved 8-bit D register */ +# define XCPT_DE_OFFSET (3*XCPT_DE) /* Offset 6: Saved 24-bit DE register */ +# define XCPT_E_OFFSET (3*XCPT_DE+1) /* Offset 7: Saved 8-bit E register */ +# define XCPT_D_OFFSET (3*XCPT_DE+2) /* Offset 8: Saved 8-bit D register */ +# define XCPT_IX_OFFSET (3*XCPT_IX) /* Offset 9: Saved 24-bit IX register */ +# define XCPT_IY_OFFSET (3*XCPT_IY) /* Offset 12: Saved 24-bit IY register */ +# define XCPT_SP_OFFSET (3*XCPT_SP) /* Offset 15: Saved 24-bit SP at time of interrupt */ +# define XCPT_HL_OFFSET (3*XCPT_HL) /* Offset 18: Saved 24-bit HL register */ +# define XCPT_L_OFFSET (3*XCPT_HL+1) /* Offset 19: Saved 8-bit L register */ +# define XCPT_H_OFFSET (3*XCPT_HL+2) /* Offset 20: Saved 8-bit H register */ +# define XCPT_AF_OFFSET (3*XCPT_AF) /* Offset 21: Saved AF register */ +# define XCPT_F_OFFSET (3*XCPT_AF+1) /* Offset 22: Saved AF register */ +# define XCPT_A_OFFSET (3*XCPT_AF+2) /* Offset 23: Saved 8-bit A register */ +# define XCPT_PC_OFFSET (3*XCPT_PC) /* Offset 24: Offset to 24-bit PC at time of interrupt */ +# define XCPTCONTEXT_SIZE (3*XCPTCONTEXT_REGS) +#endif + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* This is the type of the register save array */ + +#ifdef CONFIG_EZ80_Z80MODE +typedef uint16 chipreg_t; +#else +typedef uint24 chipreg_t; +#endif + +/* This struct defines the way the registers are stored. */ + +struct xcptcontext +{ + /* Register save area */ + + chipreg_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 */ + + chipreg_t saved_pc; /* Saved return address */ + chipreg_t saved_irqctl; /* Saved interrupt state */ +#endif +}; +#endif + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifndef __ASSEMBLY__ +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +EXTERN irqstate_t irqsave(void); +EXTERN void irqrestore(irqstate_t flags); + +#undef EXTERN +#ifdef __cplusplus +} +#endif +#endif + +#endif /* __ARCH_EZ80_IRQ_H */ + diff --git a/arch/z80/include/ez80/types.h b/arch/z80/include/ez80/types.h new file mode 100644 index 0000000000..a84e9eb57e --- /dev/null +++ b/arch/z80/include/ez80/types.h @@ -0,0 +1,95 @@ +/**************************************************************************** + * arch/z80/include/ez80/types.h + * include/arch/chip/types.h + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 Gregory Nutt 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 sys/types.h + */ + +#ifndef __ARCH_CHIP_TYPES_H +#define __ARCH_CHIP_TYPES_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Type Declarations + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +/* These are the sizes of the types supported by the ZiLOG Z8Encore! compiler: + * + * int - 24-bits + * short - 16-bits + * long - 32-bits + * char - 8-bits + * float - 32-bits + * + * Pointers: + * + * Z80 mode - 16 bits + * ADL mode - 24 bits + */ + +typedef char sbyte; +typedef unsigned char ubyte; +typedef unsigned char uint8; +typedef unsigned char boolean; +typedef short sint16; +typedef unsigned short uint16; +typedef int sint24; +typedef unsigned int uint24; +typedef long sint32; +typedef unsigned long uint32; + +/* This is the size of the interrupt state save returned by irqsave(). + * It holds the contents of the interrupt vector address + */ + +typedef ubyte irqstate_t; + +#endif /* __ASSEMBLY__ */ + +/**************************************************************************** + * Global Function Prototypes + ****************************************************************************/ + +#endif /* __ARCH_CHIP_TYPES_H */ diff --git a/arch/z80/src/ez80/Make.defs b/arch/z80/src/ez80/Make.defs new file mode 100644 index 0000000000..4c64bd84c5 --- /dev/null +++ b/arch/z80/src/ez80/Make.defs @@ -0,0 +1,49 @@ +############################################################################ +# arch/z80/src/ez80/Make.defs +# +# Copyright (C) 2008 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt +# +# 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. +# +############################################################################ + +HEAD_SSRC = ez80_head.S + +CMN_SSRCS = +CMN_CSRCS = up_initialize.c up_allocateheap.c up_createstack.c \ + up_releasestack.c up_interruptcontext.c up_blocktask.c \ + up_unblocktask.c up_exit.c up_releasepending.c \ + up_reprioritizertr.c up_idle.c up_assert.c up_doirq.c \ + up_mdelay.c up_udelay.c up_usestack.c + +CHIP_SSRCS = ez80_vector.S ez80_saveusercontext.S ez80_restorecontext.S +CHIP_CSRCS = ez80_initialstate.c ez80_irq.c ez80_saveirqcontext.c \ + ez80_schedulesigaction.c ez80_sigdeliver.c ez80_timerisr.c \ + ez80_lowuart.c ez80_serial.c ez80_registerdump.c + diff --git a/arch/z80/src/ez80/chip.h b/arch/z80/src/ez80/chip.h new file mode 100644 index 0000000000..18a2c62cd8 --- /dev/null +++ b/arch/z80/src/ez80/chip.h @@ -0,0 +1,100 @@ +/************************************************************************************ + * arch/z80/src/ez80/chip.h + * arch/z80/src/chip/chip.h + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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. + * + ************************************************************************************/ + +#ifndef __EZ80_CHIP_H +#define __EZ80_CHIP_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/* Hexadecimal Representation *******************************************************/ + +#ifdef __ASSEMBLY__ +# define _HX(h) %##h +#else +# define _HX(h) 0x##h +#endif + +/* Memory Map */ +/* Special Function Registers ******************************************************* + */ + +/* Timer Register Bit Definitions ***************************************************/ + + +/* UART Register Offsets *************************************************************/ + +/* UART0/1 Base Register Addresses **************************************************/ + +/* UART Register Bit Definitions ****************************************************/ + +/* Register access macros ***********************************************************/ + +#ifndef __ASSEMBLY__ + +# define getreg8(a) (*(volatile ubyte *)(a)) +# define putreg8(v,a) (*(volatile ubyte *)(a) = (v)) +# define getreg32(a) (*(volatile uint32 *)(a)) +# define putreg32(v,a) (*(volatile uint32 *)(a) = (v)) +# define getreg(a) getreg16(1) +# define putreg(v,a) putreg16(v,a) + +#endif + +/************************************************************************************ + * Public Function Prototypes + ************************************************************************************/ + +#ifndef __ASSEMBLY__ +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif +#endif + +#endif /* __EZ80_CHIP_H */ diff --git a/arch/z80/src/ez80/switch.h b/arch/z80/src/ez80/switch.h new file mode 100644 index 0000000000..8aec784f2e --- /dev/null +++ b/arch/z80/src/ez80/switch.h @@ -0,0 +1,249 @@ +/************************************************************************************ + * arch/z80/src/ez80/switch.h + * arch/z80/src/chip/switch.h + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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. + * + ************************************************************************************/ + +#ifndef __EZ80_SWITCH_H +#define __EZ80_SWITCH_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include +#ifndef __ASSEMBLY__ +# include +# include +#endif +#include "common/up_internal.h" + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/* EZ80_IRQSTATE_* definitions ******************************************************** + * These are used in the state field of 'struct z8_irqstate_s' structure to define + * the current state of the interrupt handling. These definition support "lazy" + * interrupt context saving. See comments below associated with s'truct z8_irqstate_s'. + */ + +#define EZ80_IRQSTATE_NONE 0 /* Not handling an interrupt */ +#define EZ80_IRQSTATE_ENTRY 1 /* In interrupt, context has not been saved */ +#define EZ80_IRQSTATE_SAVED 2 /* In interrupt, context has been saved */ + +/* The information saved on interrupt entry can be retained in a array of two + * uint16 values. These are + * + * value[0] = RP (MS byte) and Flags (LS) byte + * value[1] = PC + * + * The pointer to the save structure is a stack pointer at the time that up_doirq() + * was called: + * + * PC[7:0] + * PC[15:8] + * Flags Register + * SP -> RP + * + * The stack pointer on return from interrupt can be obtained by adding 4 to the + * pointer to the save structure. + */ + +#define EZ80_IRQSAVE_RPFLAGS (0) /* Index 10: RP (MS) and FLAGS (LS) */ +#define EZ80_IRQSAVE_PC (1) /* Index 2: PC[8:15] */ +#define EZ80_IRQSAVE_REGS (2) /* Number 16-bit values saved */ + +/* Byte offsets */ + +#define EZ80_IRQSAVE_RP_OFFS (2*EZ80_IRQSAVE_RPFLAGS) /* Offset 0: RP */ +#define EZ80_IRQSAVE_FLAGS_OFFS (2*EZ80_IRQSAVE_RPFLAGS+1) /* Offset 1: FLAGS */ +#define EZ80_IRQSAVE_PCH_OFFS (2*EZ80_IRQSAVE_PC) /* Offset 2: PC[8:15] */ +#define EZ80_IRQSAVE_PCL_OFFS (2*EZ80_IRQSAVE_PC+1) /* Offset 3: PC[0:7] */ +#define EZ80_IRQSAVE_SIZE (2*EZ80_IRQSAVE_REGS) /* Number 8-bit values saved */ + +/* Macros for portability *********************************************************** + * + * Common logic in arch/z80/src/common is customized for the z8 context switching + * logic via the following macros. + */ + +/* Initialize the IRQ state */ + +#define INIT_IRQCONTEXT() \ + do { \ + g_z8irqstate.state = EZ80_IRQSTATE_NONE; \ + } while (0) + +/* IN_INTERRUPT returns TRUE if the system is current operating in the interrupt + * context. IN_INTERRUPT is the inline equivalent of up_interrupt_context(). + */ + +#define IN_INTERRUPT() \ + (g_z8irqstate.state != EZ80_IRQSTATE_NONE) + +/* The following macro is used when the system enters interrupt handling logic */ + +#define IRQ_ENTER(irq, regs) \ + do { \ + g_z8irqstate.state = EZ80_IRQSTATE_ENTRY; \ + g_z8irqstate.regs = (regs); \ + up_maskack_irq(irq); \ + } while (0) + +/* The following macro is used when the system exits interrupt handling logic */ + +#define IRQ_LEAVE(irq) \ + do { \ + g_z8irqstate.state = EZ80_IRQSTATE_NONE; \ + up_enable_irq(irq); \ + } while (0) + +/* The following macro is used to sample the interrupt state (as a opaque handle) */ + +#define IRQ_STATE() \ + (g_z8irqstate.regs) + +/* Save the current IRQ context in the specified TCB */ + +#define SAVE_IRQCONTEXT(tcb) \ + z8_saveirqcontext((tcb)->xcp.regs) + +/* Set the current IRQ context to the state specified in the TCB */ + +#define SET_IRQCONTEXT(tcb) \ + do { \ + g_z8irqstate.state = EZ80_IRQSTATE_SAVED; \ + g_z8irqstate.regs = (tcb)->xcp.regs; \ + } while (0) + +/* Save the user context in the specified TCB. User context saves can be simpler + * because only those registers normally saved in a C called need be stored. + */ + +#define SAVE_USERCONTEXT(tcb) \ + z8_saveusercontext((tcb)->xcp.regs) + +/* Restore the full context -- either a simple user state save or the full, + * IRQ state save. + */ + +#define RESTORE_USERCONTEXT(tcb) \ + z8_restorecontext((tcb)->xcp.regs) + +/* Dump the current machine registers */ + +#define _REGISTER_DUMP() \ + z8_registerdump() + +/************************************************************************************ + * Public Types + ************************************************************************************/ + +/* In order to provide faster interrupt handling, the interrupt logic does "lazy" + * context saving as described below: + * + * (1) At the time of the interrupt, minimum information is saved and the register + * pointer is changed so that the interrupt logic does not alter the state of + * the interrupted task's registers. + * (2) If no context switch occurs during the interrupt processing, then the return + * from interrupt is also simple. + * (3) If a context switch occurs during interrupt processing, then + * (a) The full context of the interrupt task is saved, and + * (b) A full context switch is performed when the interrupt exits (see + * z8_vector.S). + * + * The following structure is used to manage this "lazy" context saving. + */ + +#ifndef __ASSEMBLY__ +struct z8_irqstate_s +{ + ubyte state; /* See EZ80_IRQSTATE_* definitions above */ + chipreg_t *regs; /* Saved register information */ +}; +#endif + +/************************************************************************************ + * Public Variables + ************************************************************************************/ + +#ifndef __ASSEMBLY__ +/* This structure holds information about the current interrupt processing state */ + +extern struct z8_irqstate_s g_z8irqstate; +#endif + +/************************************************************************************ + * Public Function Prototypes + ************************************************************************************/ + +#ifndef __ASSEMBLY__ +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +/* Defined in z8_irq.c */ + +EXTERN void up_maskack_irq(int irq); + +/* Defined in z8_saveusercontext.asm */ + +EXTERN int z8_saveusercontext(FAR chipreg_t *regs); + +/* Defined in z8_saveirqcontext.c */ + +EXTERN void z8_saveirqcontext(FAR chipreg_t *regs); + +/* Defined in z8_restorecontext.asm */ + +EXTERN void z8_restorecontext(FAR chipreg_t *regs); + +/* Defined in z8_sigsetup.c */ + +EXTERN void z8_sigsetup(FAR _TCB *tcb, sig_deliver_t sigdeliver, FAR chipreg_t *regs); + +/* Defined in z8_registerdump.c */ + +EXTERN void z8_registerdump(void); + +#undef EXTERN +#ifdef __cplusplus +} +#endif +#endif + +#endif /* __EZ80_SWITCH_H */