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134 lines
8.0 KiB
Plaintext
134 lines
8.0 KiB
Plaintext
/*
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*********************************************************************************************************
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* uC/CPU
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* CPU CONFIGURATION & PORT LAYER
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*
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* (c) Copyright 2004-2007; Micrium, Inc.; Weston, FL
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*
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* All rights reserved. Protected by international copyright laws.
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*
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* uC/CPU is provided in source form for FREE evaluation, for educational
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* use or peaceful research. If you plan on using uC/CPU in a commercial
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* product you need to contact Micrium to properly license its use in your
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* product. We provide ALL the source code for your convenience and to
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* help you experience uC/CPU. The fact that the source code is provided
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* does NOT mean that you can use it without paying a licensing fee.
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*
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* Knowledge of the source code may NOT be used to develop a similar product.
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*
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* Please help us continue to provide the Embedded community with the finest
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* software available. Your honesty is greatly appreciated.
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*********************************************************************************************************
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*/
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/*
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*********************************************************************************************************
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*
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* CPU CONFIGURATION DEFINES
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*
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* Filename : cpu_def.h
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* Version : V1.17
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* Programmer(s) : ITJ
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*********************************************************************************************************
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*/
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/*
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*********************************************************************************************************
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* CPU WORD CONFIGURATION
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*
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* Note(s) : (1) Configure CPU_CFG_ADDR_SIZE & CPU_CFG_DATA_SIZE in 'cpu.h' with CPU's word sizes :
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*
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* CPU_WORD_SIZE_08 8-bit word size
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* CPU_WORD_SIZE_16 16-bit word size
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* CPU_WORD_SIZE_32 32-bit word size
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* CPU_WORD_SIZE_64 64-bit word size See Note #1a
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*
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* (a) 64-bit word size NOT currently supported.
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*
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* (b) Ideally, CPU_WORD_SIZE #define's would be calculated at compile-time through use of
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* the sizeof() operator. However, some compilers do NOT allow pre-processor directives
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* to include run-time macro's -- e.g. 'sizeof()'.
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*
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* (2) Configure CPU_CFG_ENDIAN_TYPE in 'cpu.h' with CPU's data-word-memory order :
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*
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* CPU_ENDIAN_TYPE_BIG Big- endian word order (CPU words' most significant
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* octet @ lowest memory address)
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* CPU_ENDIAN_TYPE_LITTLE Little-endian word order (CPU words' least significant
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* octet @ lowest memory address)
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*********************************************************************************************************
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*/
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/* ----------------------- CPU WORD SIZE ---------------------- */
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#define CPU_WORD_SIZE_08 1 /* 8-bit word size = sizeof(CPU_INT08x). */
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#define CPU_WORD_SIZE_16 2 /* 16-bit word size = sizeof(CPU_INT16x). */
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#define CPU_WORD_SIZE_32 4 /* 32-bit word size = sizeof(CPU_INT32x). */
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#define CPU_WORD_SIZE_64 8 /* 64-bit word size = sizeof(CPU_INT64x) [see Note #1a]. */
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/* ------------------- CPU WORD-ENDIAN ORDER ------------------ */
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#define CPU_ENDIAN_TYPE_NONE 0 /* */
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#define CPU_ENDIAN_TYPE_BIG 1 /* Big- endian word order (CPU words' most significant ... */
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/* ... octet @ lowest mem addr). */
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#define CPU_ENDIAN_TYPE_LITTLE 2 /* Little-endian word order (CPU words' least significant ... */
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/* ... octet @ lowest mem addr). */
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/*$PAGE*/
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/*
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*********************************************************************************************************
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* CRITICAL SECTION CONFIGURATION
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*
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* Note(s) : (1) Configure CPU_CFG_CRITICAL_METHOD with CPU's/compiler's critical section method :
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*
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* Enter/Exit critical sections by ...
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*
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* CPU_CRITICAL_METHOD_INT_DIS_EN Disable/Enable interrupts
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* CPU_CRITICAL_METHOD_STATUS_STK Push/Pop interrupt status onto stack
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* CPU_CRITICAL_METHOD_STATUS_LOCAL Save/Restore interrupt status to local variable
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*
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* (a) CPU_CRITICAL_METHOD_INT_DIS_EN is NOT a preferred method since it does NOT support
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* multiple levels of interrupts. However, with some CPUs/compilers, this is the only
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* available method.
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*
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* (b) CPU_CRITICAL_METHOD_STATUS_STK is one preferred method since it DOES support multiple
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* levels of interrupts. However, this method assumes that the compiler allows in-line
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* assembly AND will correctly modify the local stack pointer when interrupt status is
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* pushed/popped onto the stack.
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*
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* (c) CPU_CRITICAL_METHOD_STATUS_LOCAL is one preferred method since it DOES support multiple
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* levels of interrupts. However, this method assumes that the compiler provides C-level
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* &/or assembly-level functionality for the following :
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*
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* ENTER CRITICAL SECTION :
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* (a) Save interrupt status into a local variable
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* (b) Disable interrupts
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*
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* EXIT CRITICAL SECTION :
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* (c) Restore interrupt status from a local variable
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*
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* (2) Critical section macro's most likely require inline assembly. If the compiler does NOT
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* allow inline assembly in C source files, critical section macro's MUST call an assembly
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* subroutine defined in a 'cpu_a.asm' file located in the following software directory :
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*
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* \<CPU-Compiler Directory>\<cpu>\<compiler>\
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*
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* where
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* <CPU-Compiler Directory> directory path for common CPU-compiler software
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* <cpu> directory name for specific CPU
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* <compiler> directory name for specific compiler
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*
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* (3) To save/restore interrupt status, a local variable 'cpu_sr' of type 'CPU_SR' MAY need to
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* be declared (e.g. if 'CPU_CRITICAL_METHOD_STATUS_LOCAL' method is configured). Configure
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* 'CPU_SR' data type in 'cpu.h' with the appropriate-sized CPU data type large enough to
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* completely store the CPU's/compiler's status word.
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*********************************************************************************************************
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*/
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/* --------------- CPU CRITICAL SECTION METHODS --------------- */
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#define CPU_CRITICAL_METHOD_NONE 0 /* */
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#define CPU_CRITICAL_METHOD_INT_DIS_EN 1 /* DIS/EN ints. */
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#define CPU_CRITICAL_METHOD_STATUS_STK 2 /* Push/Pop int status onto stk. */
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#define CPU_CRITICAL_METHOD_STATUS_LOCAL 3 /* Save/Restore int status to local var. */
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