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/**
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* \file startup.c
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*
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* \brief Configures the PLL registers to achieve the required Operating
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* frequency. Power and sleep controller is activated for UART and
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* Interuppt controller. Interrupt vector is copied to the shared Ram.
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* After doing all the above, controller is given to the application.
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*/
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/*
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* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
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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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* 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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*
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* Neither the name of Texas Instruments Incorporated nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software 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 FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "hw_syscfg0_OMAPL138.h"
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#include "hw_syscfg1_OMAPL138.h"
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#include "hw_pllc_OMAPL138.h"
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#include "soc_OMAPL138.h"
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#include "evmOMAPL138.h"
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#include "hw_types.h"
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#include "hw_ddr2_mddr.h"
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#include "psc.h"
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#define E_PASS 0
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#define E_FAIL -1
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/***********************************************************************
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** EXTERNAL FUNCTION PROTOTYPES
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***********************************************************************/
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extern void Entry(void);
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extern void UndefInstHandler(void);
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extern void SWIHandler(void);
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extern void AbortHandler(void);
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extern void IRQHandler(void);
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extern void FIQHandler(void);
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/**********************************************************************
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* INTERNAL FUNCTION PROTOTYPES
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**********************************************************************/
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unsigned int PLL0Init(unsigned char clk_src, unsigned char pllm,
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unsigned char prediv, unsigned char postdiv,
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unsigned char div1, unsigned char div3,
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unsigned char div7);
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unsigned int PLL1Init(unsigned char pllm, unsigned char postdiv,
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unsigned char div1, unsigned char div2,
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unsigned char div3);
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unsigned int DDR_Init ( unsigned int freq );
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static void CopyVectorTable(void);
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void BootAbort(void);
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int main(void);
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/******************************************************************************
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** INTERNAL VARIABLE DEFINITIONS
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*******************************************************************************/
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static unsigned int const vecTbl[14]=
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{
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0xE59FF018,
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0xE59FF018,
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0xE59FF018,
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0xE59FF018,
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0xE59FF014,
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0xE24FF008,
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0xE59FF010,
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0xE59FF010,
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(unsigned int)Entry,
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(unsigned int)UndefInstHandler,
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(unsigned int)SWIHandler,
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(unsigned int)AbortHandler,
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(unsigned int)IRQHandler,
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(unsigned int)FIQHandler
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};
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/******************************************************************************
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** FUNCTION DEFINITIONS
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*******************************************************************************/
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/**
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* \brief Boot strap function which enables the PLL(s) and PSC(s) for basic
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* module(s)
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*
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* \param none
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*
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* \return None.
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*
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* This function is the first function that needs to be called in a system.
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* This should be set as the entry point in the linker script if loading the
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* elf binary via a debugger, on the target. This function never returns, but
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* gives control to the application entry point
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**/
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unsigned int start_boot(void)
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{
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/* Enable write-protection for registers of SYSCFG module. */
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SysCfgRegistersLock();
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/* Disable write-protection for registers of SYSCFG module. */
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SysCfgRegistersUnlock();
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asm(" mrc p15, #0, r0, c1, c0, #0\n\t"
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" orr r0, r0, #0x00002000\n\t"
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" mcr p15, #0, r0, c1, c0, #0\n\t");
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PSCModuleControl(SOC_PSC_1_REGS, HW_PSC_UART2, 0, PSC_MDCTL_NEXT_ENABLE);
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PSCModuleControl(SOC_PSC_0_REGS, HW_PSC_AINTC, 0, PSC_MDCTL_NEXT_ENABLE);
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/* Initialize the vector table with opcodes */
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CopyVectorTable();
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/* Calling the main */
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main();
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while(1);
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}
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static void CopyVectorTable(void)
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{
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unsigned int *dest = (unsigned int *)0xFFFF0000;
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unsigned int *src = (unsigned int *)vecTbl;
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unsigned int count;
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for(count = 0; count < sizeof(vecTbl)/sizeof(vecTbl[0]); count++)
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{
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dest[count] = src[count];
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}
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}
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void BootAbort(void)
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{
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while (1);
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}
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/***************************** End Of File ***********************************/
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