📄 cpu_core.c
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/*
*********************************************************************************************************
* uC/CPU
* CPU CONFIGURATION & PORT LAYER
*
* (c) Copyright 2004-2011; Micrium, Inc.; Weston, FL
*
* All rights reserved. Protected by international copyright laws.
*
* uC/CPU is provided in source form to registered licensees ONLY. It is
* illegal to distribute this source code to any third party unless you receive
* written permission by an authorized Micrium representative. Knowledge of
* the source code may NOT be used to develop a similar product.
*
* Please help us continue to provide the Embedded community with the finest
* software available. Your honesty is greatly appreciated.
*
* You can contact us at www.micrium.com.
*********************************************************************************************************
*/
/*
*********************************************************************************************************
*
* CORE CPU MODULE
*
* Filename : cpu_core.c
* Version : V1.28.01
* Programmer(s) : SR
* ITJ
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* INCLUDE FILES
*********************************************************************************************************
*/
#define CPU_CORE_MODULE
#include <cpu_core.h>
/*$PAGE*/
/*
*********************************************************************************************************
* LOCAL DEFINES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL CONSTANTS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL DATA TYPES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL TABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* CPU COUNT LEAD ZEROs LOOKUP TABLE
*
* Note(s) : (1) Index into bit pattern table determines the number of leading zeros in an 8-bit value :
*
* b07 b06 b05 b04 b03 b02 b01 b00 # Leading Zeros
* --- --- --- --- --- --- --- --- ---------------
* 1 x x x x x x x 0
* 0 1 x x x x x x 1
* 0 0 1 x x x x x 2
* 0 0 0 1 x x x x 3
* 0 0 0 0 1 x x x 4
* 0 0 0 0 0 1 x x 5
* 0 0 0 0 0 0 1 x 6
* 0 0 0 0 0 0 0 1 7
* 0 0 0 0 0 0 0 0 8
*********************************************************************************************************
*/
#ifndef CPU_CFG_LEAD_ZEROS_ASM_PRESENT
static const CPU_INT08U CPU_CntLeadZerosTbl[256] = { /* Data vals : */
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
8u, 7u, 6u, 6u, 5u, 5u, 5u, 5u, 4u, 4u, 4u, 4u, 4u, 4u, 4u, 4u, /* 0x00 to 0x0F */
3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u, 3u, /* 0x10 to 0x1F */
2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, /* 0x20 to 0x2F */
2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, 2u, /* 0x30 to 0x3F */
1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, /* 0x40 to 0x4F */
1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, /* 0x50 to 0x5F */
1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, /* 0x60 to 0x6F */
1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, 1u, /* 0x70 to 0x7F */
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, /* 0x80 to 0x8F */
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, /* 0x90 to 0x9F */
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, /* 0xA0 to 0xAF */
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, /* 0xB0 to 0xBF */
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, /* 0xC0 to 0xCF */
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, /* 0xD0 to 0xDF */
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, /* 0xE0 to 0xEF */
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u /* 0xF0 to 0xFF */
};
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* LOCAL GLOBAL VARIABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL FUNCTION PROTOTYPES
*********************************************************************************************************
*/
#if (CPU_CFG_NAME_EN == DEF_ENABLED) /* ---------------- CPU NAME FNCTS ---------------- */
static void CPU_NameInit (void);
#endif
/* ----------------- CPU TS FNCTS ----------------- */
#if ((CPU_CFG_TS_EN == DEF_ENABLED) || \
(CPU_CFG_TS_TMR_EN == DEF_ENABLED))
static void CPU_TS_Init (void);
#endif
#ifdef CPU_CFG_INT_DIS_MEAS_EN /* ---------- CPU INT DIS TIME MEAS FNCTS --------- */
static void CPU_IntDisMeasInit (void);
static CPU_TS_TMR CPU_IntDisMeasMaxCalc(CPU_TS_TMR time_tot_cnts);
#endif
/*
*********************************************************************************************************
* LOCAL CONFIGURATION ERRORS
*********************************************************************************************************
*/
/*$PAGE*/
/*
*********************************************************************************************************
* CPU_Init()
*
* Description : (1) Initialize CPU module :
*
* (a) Initialize CPU timestamps
* (b) Initialize CPU interrupts disabled time measurements
* (c) Initialize CPU host name
*
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : Your Product's Application.
*
* This function is a CPU initialization function & MAY be called by application/
* initialization function(s).
*
* Note(s) : (2) CPU_Init() MUST be called ... :
*
* (a) ONLY ONCE from a product's application; ...
* (b) BEFORE product's application calls any core CPU module function(s)
*
* (3) The following initialization functions MUST be sequenced as follows :
*
* (a) CPU_TS_Init() SHOULD precede ALL calls to other CPU timestamp functions
*
* (b) CPU_IntDisMeasInit() SHOULD precede ALL calls to CPU_CRITICAL_ENTER()/CPU_CRITICAL_EXIT()
* & other CPU interrupts disabled time measurement functions
*********************************************************************************************************
*/
void CPU_Init (void)
{
/* --------------------- INIT TS ---------------------- */
#if ((CPU_CFG_TS_EN == DEF_ENABLED) || \
(CPU_CFG_TS_TMR_EN == DEF_ENABLED))
CPU_TS_Init(); /* See Note #3a. */
#endif
/* -------------- INIT INT DIS TIME MEAS -------------- */
#ifdef CPU_CFG_INT_DIS_MEAS_EN
CPU_IntDisMeasInit(); /* See Note #3b. */
#endif
/* ------------------ INIT CPU NAME ------------------- */
#if (CPU_CFG_NAME_EN == DEF_ENABLED)
CPU_NameInit();
#endif
}
/*$PAGE*/
/*
*********************************************************************************************************
* CPU_SW_Exception()
*
* Description : Trap unrecoverable software exception.
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : various.
*
* Note(s) : (1) CPU_SW_Exception() deadlocks the current code execution -- whether multi-tasked/
* -processed/-threaded or single-threaded -- when the current code execution cannot
* gracefully recover or report a fault or exception condition.
*
* See also 'cpu_core.h CPU_SW_EXCEPTION() Note #1'.
*********************************************************************************************************
*/
void CPU_SW_Exception (void)
{
while (DEF_ON) {
;
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* CPU_NameClr()
*
* Description : Clear CPU Name.
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : CPU_NameInit(),
* Application.
*
* This function is a CPU module application interface (API) function & MAY be called by
* application function(s).
*
* Note(s) : none.
*********************************************************************************************************
*/
#if (CPU_CFG_NAME_EN == DEF_ENABLED)
void CPU_NameClr (void)
{
CPU_SR_ALLOC();
CPU_CRITICAL_ENTER();
Mem_Clr((void *)&CPU_Name[0],
(CPU_SIZE_T) CPU_CFG_NAME_SIZE);
CPU_CRITICAL_EXIT();
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
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