;/* ; * Copyright (c) 2006-2022, RT-Thread Development Team ; * ; * SPDX-License-Identifier: Apache-2.0 ; * ; * Change Logs: ; * Date Author Notes ; */ ; ;/*****************************************************************************/ ;/* LPC2400.S: Startup file for Philips LPC2400 device series */ ;/*****************************************************************************/ ;/* <<< Use Configuration Wizard in Context Menu >>> */ ;/*****************************************************************************/ ;/* This file is part of the uVision/ARM development tools. */ ;/* Copyright (c) 2007-2008 Keil - An ARM Company. All rights reserved. */ ;/* This software may only be used under the terms of a valid, current, */ ;/* end user licence from KEIL for a compatible version of KEIL software */ ;/* development tools. Nothing else gives you the right to use this software. */ ;/*****************************************************************************/ ;/* ; * The LPC2400.S code is executed after CPU Reset. This file may be ; * translated with the following SET symbols. In uVision these SET ; * symbols are entered under Options - ASM - Define. ; * ; * NO_CLOCK_SETUP: when set the startup code will not initialize Clock ; * (used mostly when clock is already initialized from script .ini ; * file). ; * ; * NO_EMC_SETUP: when set the startup code will not initialize ; * External Bus Controller. ; * ; * RAM_INTVEC: when set the startup code copies exception vectors ; * from on-chip Flash to on-chip RAM. ; * ; * REMAP: when set the startup code initializes the register MEMMAP ; * which overwrites the settings of the CPU configuration pins. The ; * startup and interrupt vectors are remapped from: ; * 0x00000000 default setting (not remapped) ; * 0x40000000 when RAM_MODE is used ; * 0x80000000 when EXTMEM_MODE is used ; * ; * EXTMEM_MODE: when set the device is configured for code execution ; * from external memory starting at address 0x80000000. ; * ; * RAM_MODE: when set the device is configured for code execution ; * from on-chip RAM starting at address 0x40000000. ; */ ; Standard definitions of Mode bits and Interrupt (I & F) flags in PSRs Mode_USR EQU 0x10 Mode_FIQ EQU 0x11 Mode_IRQ EQU 0x12 Mode_SVC EQU 0x13 Mode_ABT EQU 0x17 Mode_UND EQU 0x1B Mode_SYS EQU 0x1F I_Bit EQU 0x80 ; when I bit is set, IRQ is disabled F_Bit EQU 0x40 ; when F bit is set, FIQ is disabled ;----------------------- Memory Definitions ------------------------------------ ; Internal Memory Base Addresses FLASH_BASE EQU 0x00000000 RAM_BASE EQU 0x40000000 EXTMEM_BASE EQU 0x80000000 ; External Memory Base Addresses STA_MEM0_BASE EQU 0x80000000 STA_MEM1_BASE EQU 0x81000000 STA_MEM2_BASE EQU 0x82000000 STA_MEM3_BASE EQU 0x83000000 DYN_MEM0_BASE EQU 0xA0000000 DYN_MEM1_BASE EQU 0xB0000000 DYN_MEM2_BASE EQU 0xC0000000 DYN_MEM3_BASE EQU 0xD0000000 ;----------------------- Stack and Heap Definitions ---------------------------- ;// Stack Configuration (Stack Sizes in Bytes) ;// Undefined Mode <0x0-0xFFFFFFFF:8> ;// Supervisor Mode <0x0-0xFFFFFFFF:8> ;// Abort Mode <0x0-0xFFFFFFFF:8> ;// Fast Interrupt Mode <0x0-0xFFFFFFFF:8> ;// Interrupt Mode <0x0-0xFFFFFFFF:8> ;// User/System Mode <0x0-0xFFFFFFFF:8> ;// UND_Stack_Size EQU 0x00000000 SVC_Stack_Size EQU 0x00000100 ABT_Stack_Size EQU 0x00000000 FIQ_Stack_Size EQU 0x00000000 IRQ_Stack_Size EQU 0x00000100 USR_Stack_Size EQU 0x00000100 ISR_Stack_Size EQU (UND_Stack_Size + SVC_Stack_Size + ABT_Stack_Size + \ FIQ_Stack_Size + IRQ_Stack_Size) AREA STACK, NOINIT, READWRITE, ALIGN=3 Stack_Mem SPACE USR_Stack_Size __initial_sp SPACE ISR_Stack_Size Stack_Top ;// Heap Configuration ;// Heap Size (in Bytes) <0x0-0xFFFFFFFF> ;// Heap_Size EQU 0x00000000 AREA HEAP, NOINIT, READWRITE, ALIGN=3 __heap_base Heap_Mem SPACE Heap_Size __heap_limit ;----------------------- Clock Definitions ------------------------------------- ; System Control Block (SCB) Module Definitions SCB_BASE EQU 0xE01FC000 ; SCB Base Address PLLCON_OFS EQU 0x80 ; PLL Control Offset PLLCFG_OFS EQU 0x84 ; PLL Configuration Offset PLLSTAT_OFS EQU 0x88 ; PLL Status Offset PLLFEED_OFS EQU 0x8C ; PLL Feed Offset CCLKCFG_OFS EQU 0x104 ; CPU Clock Divider Reg Offset USBCLKCFG_OFS EQU 0x108 ; USB Clock Divider Reg Offset CLKSRCSEL_OFS EQU 0x10C ; Clock Source Sel Reg Offset SCS_OFS EQU 0x1A0 ; Sys Control and Status Reg Offset PCLKSEL0_OFS EQU 0x1A8 ; Periph Clock Sel Reg 0 Offset PCLKSEL1_OFS EQU 0x1AC ; Periph Clock Sel Reg 0 Offset PCON_OFS EQU 0x0C0 ; Power Mode Control Reg Offset PCONP_OFS EQU 0x0C4 ; Power Control for Periphs Reg Offset ; Constants OSCRANGE EQU (1<<4) ; Oscillator Range Select OSCEN EQU (1<<5) ; Main oscillator Enable OSCSTAT EQU (1<<6) ; Main Oscillator Status PLLCON_PLLE EQU (1<<0) ; PLL Enable PLLCON_PLLC EQU (1<<1) ; PLL Connect PLLSTAT_M EQU (0x7FFF<<0) ; PLL M Value PLLSTAT_N EQU (0xFF<<16) ; PLL N Value PLLSTAT_PLOCK EQU (1<<26) ; PLL Lock Status ;// Clock Setup ;// System Controls and Status Register (SYS) ;// OSCRANGE: Main Oscillator Range Select ;// <0=> 1 MHz to 20 MHz ;// <1=> 15 MHz to 24 MHz ;// OSCEN: Main Oscillator Enable ;// ;// ;// ;// PLL Clock Source Select Register (CLKSRCSEL) ;// CLKSRC: PLL Clock Source Selection ;// <0=> Internal RC oscillator ;// <1=> Main oscillator ;// <2=> RTC oscillator ;// ;// ;// PLL Configuration Register (PLLCFG) ;// PLL_clk = (2* M * PLL_clk_src) / N ;// MSEL: PLL Multiplier Selection ;// <1-32768><#-1> ;// M Value ;// NSEL: PLL Divider Selection ;// <1-256><#-1> ;// N Value ;// ;// ;// CPU Clock Configuration Register (CCLKCFG) ;// CCLKSEL: Divide Value for CPU Clock from PLL ;// <1-256><#-1> ;// ;// ;// USB Clock Configuration Register (USBCLKCFG) ;// USBSEL: Divide Value for USB Clock from PLL ;// <1-16><#-1> ;// ;// ;// Peripheral Clock Selection Register 0 (PCLKSEL0) ;// PCLK_WDT: Peripheral Clock Selection for WDT ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_TIMER0: Peripheral Clock Selection for TIMER0 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_TIMER1: Peripheral Clock Selection for TIMER1 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_UART0: Peripheral Clock Selection for UART0 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_UART1: Peripheral Clock Selection for UART1 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_PWM0: Peripheral Clock Selection for PWM0 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_PWM1: Peripheral Clock Selection for PWM1 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_I2C0: Peripheral Clock Selection for I2C0 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_SPI: Peripheral Clock Selection for SPI ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_RTC: Peripheral Clock Selection for RTC ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_SSP1: Peripheral Clock Selection for SSP1 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_DAC: Peripheral Clock Selection for DAC ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_ADC: Peripheral Clock Selection for ADC ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_CAN1: Peripheral Clock Selection for CAN1 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 6 ;// PCLK_CAN2: Peripheral Clock Selection for CAN2 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 6 ;// PCLK_ACF: Peripheral Clock Selection for ACF ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 6 ;// ;// ;// Peripheral Clock Selection Register 1 (PCLKSEL1) ;// PCLK_BAT_RAM: Peripheral Clock Selection for the Battery Supported RAM ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_GPIO: Peripheral Clock Selection for GPIOs ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_PCB: Peripheral Clock Selection for Pin Connect Block ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_I2C1: Peripheral Clock Selection for I2C1 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_SSP0: Peripheral Clock Selection for SSP0 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_TIMER2: Peripheral Clock Selection for TIMER2 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_TIMER3: Peripheral Clock Selection for TIMER3 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_UART2: Peripheral Clock Selection for UART2 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_UART3: Peripheral Clock Selection for UART3 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_I2C2: Peripheral Clock Selection for I2C2 ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_I2S: Peripheral Clock Selection for I2S ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_MCI: Peripheral Clock Selection for MCI ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// PCLK_SYSCON: Peripheral Clock Selection for System Control Block ;// <0=> Pclk = Cclk / 4 ;// <1=> Pclk = Cclk ;// <2=> Pclk = Cclk / 2 ;// <3=> Pclk = Cclk / 8 ;// ;// CLOCK_SETUP EQU 1 SCS_Val EQU 0x00000020 CLKSRCSEL_Val EQU 0x00000001 PLLCFG_Val EQU 0x0000000B CCLKCFG_Val EQU 0x00000004 USBCLKCFG_Val EQU 0x00000005 PCLKSEL0_Val EQU 0x00000000 PCLKSEL1_Val EQU 0x00000000 ;----------------------- Memory Accelerator Module (MAM) Definitions ----------- MAM_BASE EQU 0xE01FC000 ; MAM Base Address MAMCR_OFS EQU 0x00 ; MAM Control Offset MAMTIM_OFS EQU 0x04 ; MAM Timing Offset ;// MAM Setup ;// MAM Control ;// <0=> Disabled ;// <1=> Partially Enabled ;// <2=> Fully Enabled ;// Mode ;// MAM Timing ;// <0=> Reserved <1=> 1 <2=> 2 <3=> 3 ;// <4=> 4 <5=> 5 <6=> 6 <7=> 7 ;// Fetch Cycles ;// MAM_SETUP EQU 1 MAMCR_Val EQU 0x00000002 MAMTIM_Val EQU 0x00000004 ;----------------------- Pin Connect Block Definitions ------------------------- PCB_BASE EQU 0xE002C000 ; PCB Base Address PINSEL0_OFS EQU 0x00 ; PINSEL0 Address Offset PINSEL1_OFS EQU 0x04 ; PINSEL1 Address Offset PINSEL2_OFS EQU 0x08 ; PINSEL2 Address Offset PINSEL3_OFS EQU 0x0C ; PINSEL3 Address Offset PINSEL4_OFS EQU 0x10 ; PINSEL4 Address Offset PINSEL5_OFS EQU 0x14 ; PINSEL5 Address Offset PINSEL6_OFS EQU 0x18 ; PINSEL6 Address Offset PINSEL7_OFS EQU 0x1C ; PINSEL7 Address Offset PINSEL8_OFS EQU 0x20 ; PINSEL8 Address Offset PINSEL9_OFS EQU 0x24 ; PINSEL9 Address Offset PINSEL10_OFS EQU 0x28 ; PINSEL10 Address Offset ;----------------------- External Memory Controller (EMC) Definitons ----------- EMC_BASE EQU 0xFFE08000 ; EMC Base Address EMC_CTRL_OFS EQU 0x000 EMC_STAT_OFS EQU 0x004 EMC_CONFIG_OFS EQU 0x008 EMC_DYN_CTRL_OFS EQU 0x020 EMC_DYN_RFSH_OFS EQU 0x024 EMC_DYN_RD_CFG_OFS EQU 0x028 EMC_DYN_RP_OFS EQU 0x030 EMC_DYN_RAS_OFS EQU 0x034 EMC_DYN_SREX_OFS EQU 0x038 EMC_DYN_APR_OFS EQU 0x03C EMC_DYN_DAL_OFS EQU 0x040 EMC_DYN_WR_OFS EQU 0x044 EMC_DYN_RC_OFS EQU 0x048 EMC_DYN_RFC_OFS EQU 0x04C EMC_DYN_XSR_OFS EQU 0x050 EMC_DYN_RRD_OFS EQU 0x054 EMC_DYN_MRD_OFS EQU 0x058 EMC_DYN_CFG0_OFS EQU 0x100 EMC_DYN_RASCAS0_OFS EQU 0x104 EMC_DYN_CFG1_OFS EQU 0x140 EMC_DYN_RASCAS1_OFS EQU 0x144 EMC_DYN_CFG2_OFS EQU 0x160 EMC_DYN_RASCAS2_OFS EQU 0x164 EMC_DYN_CFG3_OFS EQU 0x180 EMC_DYN_RASCAS3_OFS EQU 0x184 EMC_STA_CFG0_OFS EQU 0x200 EMC_STA_WWEN0_OFS EQU 0x204 EMC_STA_WOEN0_OFS EQU 0x208 EMC_STA_WRD0_OFS EQU 0x20C EMC_STA_WPAGE0_OFS EQU 0x210 EMC_STA_WWR0_OFS EQU 0x214 EMC_STA_WTURN0_OFS EQU 0x218 EMC_STA_CFG1_OFS EQU 0x220 EMC_STA_WWEN1_OFS EQU 0x224 EMC_STA_WOEN1_OFS EQU 0x228 EMC_STA_WRD1_OFS EQU 0x22C EMC_STA_WPAGE1_OFS EQU 0x230 EMC_STA_WWR1_OFS EQU 0x234 EMC_STA_WTURN1_OFS EQU 0x238 EMC_STA_CFG2_OFS EQU 0x240 EMC_STA_WWEN2_OFS EQU 0x244 EMC_STA_WOEN2_OFS EQU 0x248 EMC_STA_WRD2_OFS EQU 0x24C EMC_STA_WPAGE2_OFS EQU 0x250 EMC_STA_WWR2_OFS EQU 0x254 EMC_STA_WTURN2_OFS EQU 0x258 EMC_STA_CFG3_OFS EQU 0x260 EMC_STA_WWEN3_OFS EQU 0x264 EMC_STA_WOEN3_OFS EQU 0x268 EMC_STA_WRD3_OFS EQU 0x26C EMC_STA_WPAGE3_OFS EQU 0x270 EMC_STA_WWR3_OFS EQU 0x274 EMC_STA_WTURN3_OFS EQU 0x278 EMC_STA_EXT_W_OFS EQU 0x880 ; Constants NORMAL_CMD EQU (0x0 << 7) ; NORMAL Command MODE_CMD EQU (0x1 << 7) ; MODE Command PALL_CMD EQU (0x2 << 7) ; Precharge All Command NOP_CMD EQU (0x3 << 7) ; NOP Command BUFEN_Const EQU (1 << 19) ; Buffer enable bit EMC_PCONP_Const EQU (1 << 11) ; PCONP val to enable power for EMC ; External Memory Pins definitions ; pin functions for SDRAM, NOR and NAND flash interfacing EMC_PINSEL5_Val EQU 0x05010115 ; !CAS, !RAS, CLKOUT0, !DYCS0, DQMOUT0, DQMOUT1 EMC_PINSEL6_Val EQU 0x55555555 ; D0 .. D15 EMC_PINSEL8_Val EQU 0x55555555 ; A0 .. A15 EMC_PINSEL9_Val EQU 0x50055555; ; A16 .. A23, !OE, !WE, !CS0, !CS1 ;// External Memory Controller Setup (EMC) --------------------------------- ;// External Memory Controller Setup (EMC) EMC_SETUP EQU 0 ;// EMC Control Register (EMCControl) ;// Controls operation of the memory controller ;// L: Low-power mode enable ;// M: Address mirror enable ;// E: EMC enable ;// EMC_CTRL_Val EQU 0x00000001 ;// EMC Configuration Register (EMCConfig) ;// Configures operation of the memory controller ;// CCLK: CLKOUT ratio ;// <0=> 1:1 ;// <1=> 1:2 ;// Endian mode ;// <0=> Little-endian ;// <1=> Big-endian ;// EMC_CONFIG_Val EQU 0x00000000 ;// Dynamic Memory Interface Setup --------------------------------------- ;// Dynamic Memory Interface Setup EMC_DYNAMIC_SETUP EQU 1 ;// Dynamic Memory Refresh Timer Register (EMCDynamicRefresh) ;// Configures dynamic memory refresh operation ;// REFRESH: Refresh timer <0x000-0x7FF> ;// 0 = refresh disabled, 0x01-0x7FF: value * 16 CCLKS ;// EMC_DYN_RFSH_Val EQU 0x0000001C ;// Dynamic Memory Read Configuration Register (EMCDynamicReadConfig) ;// Configures the dynamic memory read strategy ;// RD: Read data strategy ;// <0=> Clock out delayed strategy ;// <1=> Command delayed strategy ;// <2=> Command delayed strategy plus one clock cycle ;// <3=> Command delayed strategy plus two clock cycles ;// EMC_DYN_RD_CFG_Val EQU 0x00000001 ;// Dynamic Memory Timings ;// Dynamic Memory Percentage Command Period Register (EMCDynamictRP) ;// tRP: Precharge command period <1-16> <#-1> ;// The delay is in EMCCLK cycles ;// This value is normally found in SDRAM data sheets as tRP ;// ;// Dynamic Memory Active to Precharge Command Period Register (EMCDynamictRAS) ;// tRAS: Active to precharge command period <1-16> <#-1> ;// The delay is in EMCCLK cycles ;// This value is normally found in SDRAM data sheets as tRAS ;// ;// Dynamic Memory Self-refresh Exit Time Register (EMCDynamictSREX) ;// tSREX: Self-refresh exit time <1-16> <#-1> ;// The delay is in CCLK cycles ;// This value is normally found in SDRAM data sheets as tSREX, ;// for devices without this parameter you use the same value as tXSR ;// ;// Dynamic Memory Last Data Out to Active Time Register (EMCDynamictAPR) ;// tAPR: Last-data-out to active command time <1-16> <#-1> ;// The delay is in CCLK cycles ;// This value is normally found in SDRAM data sheets as tAPR ;// ;// Dynamic Memory Data-in to Active Command Time Register (EMCDynamictDAL) ;// tDAL: Data-in to active command time <1-16> <#-1> ;// The delay is in CCLK cycles ;// This value is normally found in SDRAM data sheets as tDAL or tAPW ;// ;// Dynamic Memory Write Recovery Time Register (EMCDynamictWR) ;// tWR: Write recovery time <1-16> <#-1> ;// The delay is in CCLK cycles ;// This value is normally found in SDRAM data sheets as tWR, tDPL, tRWL, or tRDL ;// ;// Dynamic Memory Active to Active Command Period Register (EMCDynamictRC) ;// tRC: Active to active command period <1-32> <#-1> ;// The delay is in CCLK cycles ;// This value is normally found in SDRAM data sheets as tRC ;// ;// Dynamic Memory Auto-refresh Period Register (EMCDynamictRFC) ;// tRFC: Auto-refresh period and auto-refresh to active command period <1-32> <#-1> ;// The delay is in CCLK cycles ;// This value is normally found in SDRAM data sheets as tRFC or tRC ;// ;// Dynamic Memory Exit Self-refresh Register (EMCDynamictXSR) ;// tXSR: Exit self-refresh to active command time <1-32> <#-1> ;// The delay is in CCLK cycles ;// This value is normally found in SDRAM data sheets as tXSR ;// ;// Dynamic Memory Active Bank A to Active Bank B Time Register (EMCDynamicRRD) ;// tRRD: Active bank A to active bank B latency <1-16> <#-1> ;// The delay is in CCLK cycles ;// This value is normally found in SDRAM data sheets as tRRD ;// ;// Dynamic Memory Load Mode Register to Active Command Time (EMCDynamictMRD) ;// tMRD: Load mode register to active command time <1-16> <#-1> ;// The delay is in CCLK cycles ;// This value is normally found in SDRAM data sheets as tMRD or tRSA ;// ;// EMC_DYN_RP_Val EQU 0x00000002 EMC_DYN_RAS_Val EQU 0x00000003 EMC_DYN_SREX_Val EQU 0x00000007 EMC_DYN_APR_Val EQU 0x00000002 EMC_DYN_DAL_Val EQU 0x00000005 EMC_DYN_WR_Val EQU 0x00000001 EMC_DYN_RC_Val EQU 0x00000005 EMC_DYN_RFC_Val EQU 0x00000005 EMC_DYN_XSR_Val EQU 0x00000007 EMC_DYN_RRD_Val EQU 0x00000001 EMC_DYN_MRD_Val EQU 0x00000002 ;// Configure External Bus Behaviour for Dynamic CS0 Area EMC_DYNCS0_SETUP EQU 1 ;// Dynamic Memory Configuration Register (EMCDynamicConfig0) ;// Defines the configuration information for the dynamic memory CS0 ;// P: Write protect ;// B: Buffer enable ;// AM 14: External bus data width ;// <0=> 16 bit ;// <1=> 32 bit ;// AM 12: External bus memory type ;// <0=> High-performance ;// <1=> Low-power SDRAM ;// AM 11..7: External bus address mapping (Row, Bank, Column) ;// <0x00=> 16 Mb = 2MB (2Mx8), 2 banks, row length = 11, column length = 9 ;// <0x01=> 16 Mb = 2MB (1Mx16), 2 banks, row length = 11, column length = 8 ;// <0x04=> 64 Mb = 8MB (8Mx8), 4 banks, row length = 12, column length = 9 ;// <0x05=> 64 Mb = 8MB (4Mx16), 4 banks, row length = 12, column length = 8 ;// <0x08=> 128 Mb = 16MB (16Mx8), 4 banks, row length = 12, column length = 10 ;// <0x09=> 128 Mb = 16MB (8Mx16), 4 banks, row length = 12, column length = 9 ;// <0x0C=> 256 Mb = 32MB (32Mx8), 4 banks, row length = 13, column length = 10 ;// <0x0D=> 256 Mb = 32MB (16Mx16), 4 banks, row length = 13, column length = 9 ;// <0x10=> 512 Mb = 64MB (64Mx8), 4 banks, row length = 13, column length = 11 ;// <0x11=> 512 Mb = 64MB (32Mx16), 4 banks, row length = 13, column length = 10 ;// MD: Memory device ;// <0=> SDRAM ;// <1=> Low-power SDRAM ;// <2=> Micron SyncFlash ;// EMC_DYN_CFG0_Val EQU 0x00080680 ;// Dynamic Memory RAS & CAS Delay register (EMCDynamicRASCAS0) ;// Controls the RAS and CAS latencies for the dynamic memory CS0 ;// CAS: CAS latency ;// <1=> One CCLK cycle ;// <2=> Two CCLK cycles ;// <3=> Three CCLK cycles ;// RAS: RAS latency (active to read/write delay) ;// <1=> One CCLK cycle ;// <2=> Two CCLK cycles ;// <3=> Three CCLK cycles ;// EMC_DYN_RASCAS0_Val EQU 0x00000303 ;// End of Dynamic Setup for CS0 Area ;// Configure External Bus Behaviour for Dynamic CS1 Area EMC_DYNCS1_SETUP EQU 0 ;// Dynamic Memory Configuration Register (EMCDynamicConfig1) ;// Defines the configuration information for the dynamic memory CS1 ;// P: Write protect ;// B: Buffer enable ;// AM 14: External bus data width ;// <0=> 16 bit ;// <1=> 32 bit ;// AM 12: External bus memory type ;// <0=> High-performance ;// <1=> Low-power SDRAM ;// AM 11..7: External bus address mapping (Row, Bank, Column) ;// <0x00=> 16 Mb = 2MB (2Mx8), 2 banks, row length = 11, column length = 9 ;// <0x01=> 16 Mb = 2MB (1Mx16), 2 banks, row length = 11, column length = 8 ;// <0x04=> 64 Mb = 8MB (8Mx8), 4 banks, row length = 12, column length = 9 ;// <0x05=> 64 Mb = 8MB (4Mx16), 4 banks, row length = 12, column length = 8 ;// <0x08=> 128 Mb = 16MB (16Mx8), 4 banks, row length = 12, column length = 10 ;// <0x09=> 128 Mb = 16MB (8Mx16), 4 banks, row length = 12, column length = 9 ;// <0x0C=> 256 Mb = 32MB (32Mx8), 4 banks, row length = 13, column length = 10 ;// <0x0D=> 256 Mb = 32MB (16Mx16), 4 banks, row length = 13, column length = 9 ;// <0x10=> 512 Mb = 64MB (64Mx8), 4 banks, row length = 13, column length = 11 ;// <0x11=> 512 Mb = 64MB (32Mx16), 4 banks, row length = 13, column length = 10 ;// MD: Memory device ;// <0=> SDRAM ;// <1=> Low-power SDRAM ;// <2=> Micron SyncFlash ;// EMC_DYN_CFG1_Val EQU 0x00000000 ;// Dynamic Memory RAS & CAS Delay register (EMCDynamicRASCAS1) ;// Controls the RAS and CAS latencies for the dynamic memory CS1 ;// CAS: CAS latency ;// <1=> One CCLK cycle ;// <2=> Two CCLK cycles ;// <3=> Three CCLK cycles ;// RAS: RAS latency (active to read/write delay) ;// <1=> One CCLK cycle ;// <2=> Two CCLK cycles ;// <3=> Three CCLK cycles ;// EMC_DYN_RASCAS1_Val EQU 0x00000303 ;// End of Dynamic Setup for CS1 Area ;// Configure External Bus Behaviour for Dynamic CS2 Area EMC_DYNCS2_SETUP EQU 0 ;// Dynamic Memory Configuration Register (EMCDynamicConfig2) ;// Defines the configuration information for the dynamic memory CS2 ;// P: Write protect ;// B: Buffer enable ;// AM 14: External bus data width ;// <0=> 16 bit ;// <1=> 32 bit ;// AM 12: External bus memory type ;// <0=> High-performance ;// <1=> Low-power SDRAM ;// AM 11..7: External bus address mapping (Row, Bank, Column) ;// <0x00=> 16 Mb = 2MB (2Mx8), 2 banks, row length = 11, column length = 9 ;// <0x01=> 16 Mb = 2MB (1Mx16), 2 banks, row length = 11, column length = 8 ;// <0x04=> 64 Mb = 8MB (8Mx8), 4 banks, row length = 12, column length = 9 ;// <0x05=> 64 Mb = 8MB (4Mx16), 4 banks, row length = 12, column length = 8 ;// <0x08=> 128 Mb = 16MB (16Mx8), 4 banks, row length = 12, column length = 10 ;// <0x09=> 128 Mb = 16MB (8Mx16), 4 banks, row length = 12, column length = 9 ;// <0x0C=> 256 Mb = 32MB (32Mx8), 4 banks, row length = 13, column length = 10 ;// <0x0D=> 256 Mb = 32MB (16Mx16), 4 banks, row length = 13, column length = 9 ;// <0x10=> 512 Mb = 64MB (64Mx8), 4 banks, row length = 13, column length = 11 ;// <0x11=> 512 Mb = 64MB (32Mx16), 4 banks, row length = 13, column length = 10 ;// MD: Memory device ;// <0=> SDRAM ;// <1=> Low-power SDRAM ;// <2=> Micron SyncFlash ;// EMC_DYN_CFG2_Val EQU 0x00000000 ;// Dynamic Memory RAS & CAS Delay register (EMCDynamicRASCAS2) ;// Controls the RAS and CAS latencies for the dynamic memory CS2 ;// CAS: CAS latency ;// <1=> One CCLK cycle ;// <2=> Two CCLK cycles ;// <3=> Three CCLK cycles ;// RAS: RAS latency (active to read/write delay) ;// <1=> One CCLK cycle ;// <2=> Two CCLK cycles ;// <3=> Three CCLK cycles ;// EMC_DYN_RASCAS2_Val EQU 0x00000303 ;// End of Dynamic Setup for CS2 Area ;// Configure External Bus Behaviour for Dynamic CS3 Area EMC_DYNCS3_SETUP EQU 0 ;// Dynamic Memory Configuration Register (EMCDynamicConfig3) ;// Defines the configuration information for the dynamic memory CS3 ;// P: Write protect ;// B: Buffer enable ;// AM 14: External bus data width ;// <0=> 16 bit ;// <1=> 32 bit ;// AM 12: External bus memory type ;// <0=> High-performance ;// <1=> Low-power SDRAM ;// AM 11..7: External bus address mapping (Row, Bank, Column) ;// <0x00=> 16 Mb = 2MB (2Mx8), 2 banks, row length = 11, column length = 9 ;// <0x01=> 16 Mb = 2MB (1Mx16), 2 banks, row length = 11, column length = 8 ;// <0x04=> 64 Mb = 8MB (8Mx8), 4 banks, row length = 12, column length = 9 ;// <0x05=> 64 Mb = 8MB (4Mx16), 4 banks, row length = 12, column length = 8 ;// <0x08=> 128 Mb = 16MB (16Mx8), 4 banks, row length = 12, column length = 10 ;// <0x09=> 128 Mb = 16MB (8Mx16), 4 banks, row length = 12, column length = 9 ;// <0x0C=> 256 Mb = 32MB (32Mx8), 4 banks, row length = 13, column length = 10 ;// <0x0D=> 256 Mb = 32MB (16Mx16), 4 banks, row length = 13, column length = 9 ;// <0x10=> 512 Mb = 64MB (64Mx8), 4 banks, row length = 13, column length = 11 ;// <0x11=> 512 Mb = 64MB (32Mx16), 4 banks, row length = 13, column length = 10 ;// MD: Memory device ;// <0=> SDRAM ;// <1=> Low-power SDRAM ;// <2=> Micron SyncFlash ;// EMC_DYN_CFG3_Val EQU 0x00000000 ;// Dynamic Memory RAS & CAS Delay register (EMCDynamicRASCAS3) ;// Controls the RAS and CAS latencies for the dynamic memory CS3 ;// CAS: CAS latency ;// <1=> One CCLK cycle ;// <2=> Two CCLK cycles ;// <3=> Three CCLK cycles ;// RAS: RAS latency (active to read/write delay) ;// <1=> One CCLK cycle ;// <2=> Two CCLK cycles ;// <3=> Three CCLK cycles ;// EMC_DYN_RASCAS3_Val EQU 0x00000303 ;// End of Dynamic Setup for CS3 Area ;// End of Dynamic Setup ;// Static Memory Interface Setup ---------------------------------------- ;// Static Memory Interface Setup EMC_STATIC_SETUP EQU 1 ;// Configure External Bus Behaviour for Static CS0 Area --------------- ;// Configure External Bus Behaviour for Static CS0 Area EMC_STACS0_SETUP EQU 1 ;// Static Memory Configuration Register (EMCStaticConfig0) ;// Defines the configuration information for the static memory CS0 ;// WP: Write protect ;// B: Buffer enable ;// EW: Extended wait enable ;// PB: Byte lane state ;// <0=> For reads BLSn are HIGH, for writes BLSn are LOW ;// <1=> For reads BLSn are LOW, for writes BLSn are LOW ;// PC: Chip select polarity ;// <0=> Active LOW chip select ;// <1=> Active HIGH chip select ;// PM: Page mode enable ;// MW: Memory width ;// <0=> 8 bit ;// <1=> 16 bit ;// <2=> 32 bit ;// EMC_STA_CFG0_Val EQU 0x00000081 ;// Static Memory Write Enable Delay Register (EMCStaticWaitWen0) ;// Selects the delay from CS0 to write enable ;// WAITWEN: Wait write enable <1-16> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WWEN0_Val EQU 0x00000002 ;// Static Memory Output Enable Delay register (EMCStaticWaitOen0) ;// Selects the delay from CS0 or address change, whichever is later, to output enable ;// WAITOEN: Wait output enable <0-15> ;// The delay is in CCLK cycles ;// EMC_STA_WOEN0_Val EQU 0x00000002 ;// Static Memory Read Delay Register (EMCStaticWaitRd0) ;// Selects the delay from CS0 to a read access ;// WAITRD: Non-page mode read wait states or asynchronous page mode read first access wait states <1-32> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WRD0_Val EQU 0x0000001F ;// Static Memory Page Mode Read Delay Register (EMCStaticWaitPage0) ;// Selects the delay for asynchronous page mode sequential accesses for CS0 ;// WAITPAGE: Asynchronous page mode read after the first read wait states <1-32> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WPAGE0_Val EQU 0x0000001F ;// Static Memory Write Delay Register (EMCStaticWaitWr0) ;// Selects the delay from CS0 to a write access ;// WAITWR: Write wait states <2-33> <#-2> ;// The delay is in CCLK cycles ;// EMC_STA_WWR0_Val EQU 0x0000001F ;// Static Memory Turn Round Delay Register (EMCStaticWaitTurn0) ;// Selects the number of bus turnaround cycles for CS0 ;// WAITTURN: Bus turnaround cycles <1-16> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WTURN0_Val EQU 0x0000000F ;// End of Static Setup for Static CS0 Area ;// Configure External Bus Behaviour for Static CS1 Area --------------- ;// Configure External Bus Behaviour for Static CS1 Area EMC_STACS1_SETUP EQU 0 ;// Static Memory Configuration Register (EMCStaticConfig1) ;// Defines the configuration information for the static memory CS1 ;// WP: Write protect ;// B: Buffer enable ;// EW: Extended wait enable ;// PB: Byte lane state ;// <0=> For reads BLSn are HIGH, for writes BLSn are LOW ;// <1=> For reads BLSn are LOW, for writes BLSn are LOW ;// PC: Chip select polarity ;// <0=> Active LOW chip select ;// <1=> Active HIGH chip select ;// PM: Page mode enable ;// MW: Memory width ;// <0=> 8 bit ;// <1=> 16 bit ;// <2=> 32 bit ;// EMC_STA_CFG1_Val EQU 0x00000000 ;// Static Memory Write Enable Delay Register (EMCStaticWaitWen1) ;// Selects the delay from CS1 to write enable ;// WAITWEN: Wait write enable <1-16> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WWEN1_Val EQU 0x00000000 ;// Static Memory Output Enable Delay register (EMCStaticWaitOen1) ;// Selects the delay from CS1 or address change, whichever is later, to output enable ;// WAITOEN: Wait output enable <0-15> ;// The delay is in CCLK cycles ;// EMC_STA_WOEN1_Val EQU 0x00000000 ;// Static Memory Read Delay Register (EMCStaticWaitRd1) ;// Selects the delay from CS1 to a read access ;// WAITRD: Non-page mode read wait states or asynchronous page mode read first access wait states <1-32> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WRD1_Val EQU 0x0000001F ;// Static Memory Page Mode Read Delay Register (EMCStaticWaitPage0) ;// Selects the delay for asynchronous page mode sequential accesses for CS1 ;// WAITPAGE: Asynchronous page mode read after the first read wait states <1-32> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WPAGE1_Val EQU 0x0000001F ;// Static Memory Write Delay Register (EMCStaticWaitWr1) ;// Selects the delay from CS1 to a write access ;// WAITWR: Write wait states <2-33> <#-2> ;// The delay is in CCLK cycles ;// EMC_STA_WWR1_Val EQU 0x0000001F ;// Static Memory Turn Round Delay Register (EMCStaticWaitTurn1) ;// Selects the number of bus turnaround cycles for CS1 ;// WAITTURN: Bus turnaround cycles <1-16> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WTURN1_Val EQU 0x0000000F ;// End of Static Setup for Static CS1 Area ;// Configure External Bus Behaviour for Static CS2 Area --------------- ;// Configure External Bus Behaviour for Static CS2 Area EMC_STACS2_SETUP EQU 0 ;// Static Memory Configuration Register (EMCStaticConfig2) ;// Defines the configuration information for the static memory CS2 ;// WP: Write protect ;// B: Buffer enable ;// EW: Extended wait enable ;// PB: Byte lane state ;// <0=> For reads BLSn are HIGH, for writes BLSn are LOW ;// <1=> For reads BLSn are LOW, for writes BLSn are LOW ;// PC: Chip select polarity ;// <0=> Active LOW chip select ;// <1=> Active HIGH chip select ;// PM: Page mode enable ;// MW: Memory width ;// <0=> 8 bit ;// <1=> 16 bit ;// <2=> 32 bit ;// EMC_STA_CFG2_Val EQU 0x00000000 ;// Static Memory Write Enable Delay Register (EMCStaticWaitWen2) ;// Selects the delay from CS2 to write enable ;// WAITWEN: Wait write enable <1-16> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WWEN2_Val EQU 0x00000000 ;// Static Memory Output Enable Delay register (EMCStaticWaitOen2) ;// Selects the delay from CS2 or address change, whichever is later, to output enable ;// WAITOEN: Wait output enable <0-15> ;// The delay is in CCLK cycles ;// EMC_STA_WOEN2_Val EQU 0x00000000 ;// Static Memory Read Delay Register (EMCStaticWaitRd2) ;// Selects the delay from CS2 to a read access ;// WAITRD: Non-page mode read wait states or asynchronous page mode read first access wait states <1-32> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WRD2_Val EQU 0x0000001F ;// Static Memory Page Mode Read Delay Register (EMCStaticWaitPage2) ;// Selects the delay for asynchronous page mode sequential accesses for CS2 ;// WAITPAGE: Asynchronous page mode read after the first read wait states <1-32> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WPAGE2_Val EQU 0x0000001F ;// Static Memory Write Delay Register (EMCStaticWaitWr2) ;// Selects the delay from CS2 to a write access ;// WAITWR: Write wait states <2-33> <#-2> ;// The delay is in CCLK cycles ;// EMC_STA_WWR2_Val EQU 0x0000001F ;// Static Memory Turn Round Delay Register (EMCStaticWaitTurn2) ;// Selects the number of bus turnaround cycles for CS2 ;// WAITTURN: Bus turnaround cycles <1-16> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WTURN2_Val EQU 0x0000000F ;// End of Static Setup for Static CS2 Area ;// Configure External Bus Behaviour for Static CS3 Area --------------- ;// Configure External Bus Behaviour for Static CS3 Area EMC_STACS3_SETUP EQU 0 ;// Static Memory Configuration Register (EMCStaticConfig3) ;// Defines the configuration information for the static memory CS3 ;// WP: Write protect ;// B: Buffer enable ;// EW: Extended wait enable ;// PB: Byte lane state ;// <0=> For reads BLSn are HIGH, for writes BLSn are LOW ;// <1=> For reads BLSn are LOW, for writes BLSn are LOW ;// PC: Chip select polarity ;// <0=> Active LOW chip select ;// <1=> Active HIGH chip select ;// PM: Page mode enable ;// MW: Memory width ;// <0=> 8 bit ;// <1=> 16 bit ;// <2=> 32 bit ;// EMC_STA_CFG3_Val EQU 0x00000000 ;// Static Memory Write Enable Delay Register (EMCStaticWaitWen3) ;// Selects the delay from CS3 to write enable ;// WAITWEN: Wait write enable <1-16> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WWEN3_Val EQU 0x00000000 ;// Static Memory Output Enable Delay register (EMCStaticWaitOen3) ;// Selects the delay from CS3 or address change, whichever is later, to output enable ;// WAITOEN: Wait output enable <0-15> ;// The delay is in CCLK cycles ;// EMC_STA_WOEN3_Val EQU 0x00000000 ;// Static Memory Read Delay Register (EMCStaticWaitRd3) ;// Selects the delay from CS3 to a read access ;// WAITRD: Non-page mode read wait states or asynchronous page mode read first access wait states <1-32> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WRD3_Val EQU 0x0000001F ;// Static Memory Page Mode Read Delay Register (EMCStaticWaitPage3) ;// Selects the delay for asynchronous page mode sequential accesses for CS3 ;// WAITPAGE: Asynchronous page mode read after the first read wait states <1-32> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WPAGE3_Val EQU 0x0000001F ;// Static Memory Write Delay Register (EMCStaticWaitWr3) ;// Selects the delay from CS3 to a write access ;// WAITWR: Write wait states <2-33> <#-2> ;// The delay is in CCLK cycles ;// EMC_STA_WWR3_Val EQU 0x0000001F ;// Static Memory Turn Round Delay Register (EMCStaticWaitTurn3) ;// Selects the number of bus turnaround cycles for CS3 ;// WAITTURN: Bus turnaround cycles <1-16> <#-1> ;// The delay is in CCLK cycles ;// EMC_STA_WTURN3_Val EQU 0x0000000F ;// End of Static Setup for Static CS3 Area ;// Static Memory Extended Wait Register (EMCStaticExtendedWait) ;// Time long static memory read and write transfers ;// EXTENDEDWAIT: Extended wait time out <0-1023> ;// The delay is in (16 * CCLK) cycles ;// EMC_STA_EXT_W_Val EQU 0x00000000 ;// End of Static Setup ;// End of EMC Setup PRESERVE8 ; Area Definition and Entry Point ; Startup Code must be linked first at Address at which it expects to run. AREA RESET, CODE, READONLY ARM ; Exception Vectors ; Mapped to Address 0. ; Absolute addressing mode must be used. ; Dummy Handlers are implemented as infinite loops which can be modified. Vectors LDR PC, Reset_Addr LDR PC, Undef_Addr LDR PC, SWI_Addr LDR PC, PAbt_Addr LDR PC, DAbt_Addr NOP ; Reserved Vector LDR PC, IRQ_Addr LDR PC, FIQ_Addr Reset_Addr DCD Reset_Handler Undef_Addr DCD Undef_Handler SWI_Addr DCD SWI_Handler PAbt_Addr DCD PAbt_Handler DAbt_Addr DCD DAbt_Handler DCD 0 ; Reserved Address IRQ_Addr DCD IRQ_Handler FIQ_Addr DCD FIQ_Handler ; Exception Handler IMPORT rt_hw_trap_udef IMPORT rt_hw_trap_swi IMPORT rt_hw_trap_pabt IMPORT rt_hw_trap_dabt IMPORT rt_hw_trap_fiq ; Prepare Fatal Context MACRO prepare_fatal STMFD sp!, {r0-r3} MOV r1, sp ADD sp, sp, #16 SUB r2, lr, #4 MRS r3, spsr ; switch to SVC mode and no interrupt MSR cpsr_c, #I_Bit :OR: F_Bit :OR: Mode_SVC STMFD sp!, {r0} ; old r0 ; get sp ADD r0, sp, #4 STMFD sp!, {r3} ; cpsr STMFD sp!, {r2} ; pc STMFD sp!, {lr} ; lr STMFD sp!, {r0} ; sp STMFD sp!, {r4-r12} MOV r4, r1 LDMFD r4!, {r0-r3} STMFD sp!, {r0-r3} MOV r0, sp MEND Undef_Handler prepare_fatal BL rt_hw_trap_irq B . SWI_Handler prepare_fatal BL rt_hw_trap_swi B . PAbt_Handler prepare_fatal BL rt_hw_trap_pabt B . DAbt_Handler prepare_fatal BL rt_hw_trap_dabt B . FIQ_Handler prepare_fatal BL rt_hw_trap_fiq B . ; Reset Handler EXPORT Reset_Handler Reset_Handler ; Clock Setup ------------------------------------------------------------------ IF (:LNOT:(:DEF:NO_CLOCK_SETUP)):LAND:(CLOCK_SETUP != 0) LDR R0, =SCB_BASE MOV R1, #0xAA MOV R2, #0x55 ; Configure and Enable PLL LDR R3, =SCS_Val ; Enable main oscillator STR R3, [R0, #SCS_OFS] IF (SCS_Val:AND:OSCEN) != 0 OSC_Loop LDR R3, [R0, #SCS_OFS] ; Wait for main osc stabilize ANDS R3, R3, #OSCSTAT BEQ OSC_Loop ENDIF LDR R3, =CLKSRCSEL_Val ; Select PLL source clock STR R3, [R0, #CLKSRCSEL_OFS] LDR R3, =PLLCFG_Val STR R3, [R0, #PLLCFG_OFS] STR R1, [R0, #PLLFEED_OFS] STR R2, [R0, #PLLFEED_OFS] MOV R3, #PLLCON_PLLE STR R3, [R0, #PLLCON_OFS] STR R1, [R0, #PLLFEED_OFS] STR R2, [R0, #PLLFEED_OFS] IF (CLKSRCSEL_Val:AND:3) != 2 ; Wait until PLL Locked (if source is not RTC oscillator) PLL_Loop LDR R3, [R0, #PLLSTAT_OFS] ANDS R3, R3, #PLLSTAT_PLOCK BEQ PLL_Loop ELSE ; Wait at least 200 cycles (if source is RTC oscillator) MOV R3, #(200/4) PLL_Loop SUBS R3, R3, #1 BNE PLL_Loop ENDIF M_N_Lock LDR R3, [R0, #PLLSTAT_OFS] LDR R4, =(PLLSTAT_M:OR:PLLSTAT_N) AND R3, R3, R4 LDR R4, =PLLCFG_Val EORS R3, R3, R4 BNE M_N_Lock ; Setup CPU clock divider MOV R3, #CCLKCFG_Val STR R3, [R0, #CCLKCFG_OFS] ; Setup USB clock divider LDR R3, =USBCLKCFG_Val STR R3, [R0, #USBCLKCFG_OFS] ; Setup Peripheral Clock LDR R3, =PCLKSEL0_Val STR R3, [R0, #PCLKSEL0_OFS] LDR R3, =PCLKSEL1_Val STR R3, [R0, #PCLKSEL1_OFS] ; Switch to PLL Clock MOV R3, #(PLLCON_PLLE:OR:PLLCON_PLLC) STR R3, [R0, #PLLCON_OFS] STR R1, [R0, #PLLFEED_OFS] STR R2, [R0, #PLLFEED_OFS] ENDIF ; CLOCK_SETUP ; Setup Memory Accelerator Module ---------------------------------------------- IF MAM_SETUP != 0 LDR R0, =MAM_BASE MOV R1, #MAMTIM_Val STR R1, [R0, #MAMTIM_OFS] MOV R1, #MAMCR_Val STR R1, [R0, #MAMCR_OFS] ENDIF ; MAM_SETUP ; Setup External Memory Controller --------------------------------------------- IF (:LNOT:(:DEF:NO_EMC_SETUP)):LAND:(EMC_SETUP != 0) LDR R0, =EMC_BASE LDR R1, =SCB_BASE LDR R2, =PCB_BASE LDR R4, =EMC_PCONP_Const ; Enable EMC LDR R3, [R1, #PCONP_OFS] ORR R4, R4, R3 STR R4, [R1, #PCONP_OFS] LDR R4, =EMC_CTRL_Val STR R4, [R0, #EMC_CTRL_OFS] LDR R4, =EMC_CONFIG_Val STR R4, [R0, #EMC_CONFIG_OFS] ; Setup pin functions for External Bus functionality LDR R4, =EMC_PINSEL5_Val STR R4, [R2, #PINSEL5_OFS] LDR R4, =EMC_PINSEL6_Val STR R4, [R2, #PINSEL6_OFS] LDR R4, =EMC_PINSEL8_Val STR R4, [R2, #PINSEL8_OFS] LDR R4, =EMC_PINSEL9_Val STR R4, [R2, #PINSEL9_OFS] ; Setup Dynamic Memory Interface IF (EMC_DYNAMIC_SETUP != 0) LDR R4, =EMC_DYN_RP_Val STR R4, [R0, #EMC_DYN_RP_OFS] LDR R4, =EMC_DYN_RAS_Val STR R4, [R0, #EMC_DYN_RAS_OFS] LDR R4, =EMC_DYN_SREX_Val STR R4, [R0, #EMC_DYN_SREX_OFS] LDR R4, =EMC_DYN_APR_Val STR R4, [R0, #EMC_DYN_APR_OFS] LDR R4, =EMC_DYN_DAL_Val STR R4, [R0, #EMC_DYN_DAL_OFS] LDR R4, =EMC_DYN_WR_Val STR R4, [R0, #EMC_DYN_WR_OFS] LDR R4, =EMC_DYN_RC_Val STR R4, [R0, #EMC_DYN_RC_OFS] LDR R4, =EMC_DYN_RFC_Val STR R4, [R0, #EMC_DYN_RFC_OFS] LDR R4, =EMC_DYN_XSR_Val STR R4, [R0, #EMC_DYN_XSR_OFS] LDR R4, =EMC_DYN_RRD_Val STR R4, [R0, #EMC_DYN_RRD_OFS] LDR R4, =EMC_DYN_MRD_Val STR R4, [R0, #EMC_DYN_MRD_OFS] LDR R4, =EMC_DYN_RD_CFG_Val STR R4, [R0, #EMC_DYN_RD_CFG_OFS] IF (EMC_DYNCS0_SETUP != 0) LDR R4, =EMC_DYN_RASCAS0_Val STR R4, [R0, #EMC_DYN_RASCAS0_OFS] LDR R4, =EMC_DYN_CFG0_Val MVN R5, #BUFEN_Const AND R4, R4, R5 STR R4, [R0, #EMC_DYN_CFG0_OFS] ENDIF IF (EMC_DYNCS1_SETUP != 0) LDR R4, =EMC_DYN_RASCAS1_Val STR R4, [R0, #EMC_DYN_RASCAS1_OFS] LDR R4, =EMC_DYN_CFG1_Val MVN R5, =BUFEN_Const AND R4, R4, R5 STR R4, [R0, #EMC_DYN_CFG1_OFS] ENDIF IF (EMC_DYNCS2_SETUP != 0) LDR R4, =EMC_DYN_RASCAS2_Val STR R4, [R0, #EMC_DYN_RASCAS2_OFS] LDR R4, =EMC_DYN_CFG2_Val MVN R5, =BUFEN_Const AND R4, R4, R5 STR R4, [R0, #EMC_DYN_CFG2_OFS] ENDIF IF (EMC_DYNCS3_SETUP != 0) LDR R4, =EMC_DYN_RASCAS3_Val STR R4, [R0, #EMC_DYN_RASCAS3_OFS] LDR R4, =EMC_DYN_CFG3_Val MVN R5, =BUFEN_Const AND R4, R4, R5 STR R4, [R0, #EMC_DYN_CFG3_OFS] ENDIF LDR R6, =1440000 ; Number of cycles to delay Wait_0 SUBS R6, R6, #1 ; Delay ~100 ms proc clk 57.6 MHz BNE Wait_0 ; BNE (3 cyc) + SUBS (1 cyc) = 4 cyc LDR R4, =(NOP_CMD:OR:0x03) ; Write NOP Command STR R4, [R0, #EMC_DYN_CTRL_OFS] LDR R6, =2880000 ; Number of cycles to delay Wait_1 SUBS R6, R6, #1 ; Delay ~200 ms proc clk 57.6 MHz BNE Wait_1 LDR R4, =(PALL_CMD:OR:0x03) ; Write Precharge All Command STR R4, [R0, #EMC_DYN_CTRL_OFS] MOV R4, #2 STR R4, [R0, #EMC_DYN_RFSH_OFS] MOV R6, #64 ; Number of cycles to delay Wait_2 SUBS R6, R6, #1 ; Delay BNE Wait_2 LDR R4, =EMC_DYN_RFSH_Val STR R4, [R0, #EMC_DYN_RFSH_OFS] LDR R4, =(MODE_CMD:OR:0x03) ; Write MODE Command STR R4, [R0, #EMC_DYN_CTRL_OFS] ; Dummy read IF (EMC_DYNCS0_SETUP != 0) LDR R4, =DYN_MEM0_BASE MOV R5, #(0x33 << 12) ADD R4, R4, R5 LDR R4, [R4, #0] ENDIF IF (EMC_DYNCS1_SETUP != 0) LDR R4, =DYN_MEM1_BASE MOV R5, #(0x33 << 12) ADD R4, R4, R5 LDR R4, [R4, #0] ENDIF IF (EMC_DYNCS2_SETUP != 0) LDR R4, =DYN_MEM2_BASE MOV R5, #(0x33 << 12) ADD R4, R4, R5 LDR R4, [R4, #0] ENDIF IF (EMC_DYNCS3_SETUP != 0) LDR R4, =DYN_MEM3_BASE MOV R5, #(0x33 << 12) ADD R4, R4, R5 LDR R4, [R4, #0] ENDIF LDR R4, =NORMAL_CMD ; Write NORMAL Command STR R4, [R0, #EMC_DYN_CTRL_OFS] ; Enable buffer if requested by settings IF (EMC_DYNCS0_SETUP != 0):LAND:((EMC_DYN_CFG0_Val:AND:BUFEN_Const) != 0) LDR R4, =EMC_DYN_CFG0_Val STR R4, [R0, #EMC_DYN_CFG0_OFS] ENDIF IF (EMC_DYNCS1_SETUP != 0):LAND:((EMC_DYN_CFG1_Val:AND:BUFEN_Const) != 0) LDR R4, =EMC_DYN_CFG1_Val STR R4, [R0, #EMC_DYN_CFG1_OFS] ENDIF IF (EMC_DYNCS2_SETUP != 0):LAND:((EMC_DYN_CFG2_Val:AND:BUFEN_Const) != 0) LDR R4, =EMC_DYN_CFG2_Val STR R4, [R0, #EMC_DYN_CFG2_OFS] ENDIF IF (EMC_DYNCS3_SETUP != 0):LAND:((EMC_DYN_CFG3_Val:AND:BUFEN_Const) != 0) LDR R4, =EMC_DYN_CFG3_Val STR R4, [R0, #EMC_DYN_CFG3_OFS] ENDIF LDR R6, =14400 ; Number of cycles to delay Wait_3 SUBS R6, R6, #1 ; Delay ~1 ms @ proc clk 57.6 MHz BNE Wait_3 ENDIF ; EMC_DYNAMIC_SETUP ; Setup Static Memory Interface IF (EMC_STATIC_SETUP != 0) LDR R6, =1440000 ; Number of cycles to delay Wait_4 SUBS R6, R6, #1 ; Delay ~100 ms @ proc clk 57.6 MHz BNE Wait_4 IF (EMC_STACS0_SETUP != 0) LDR R4, =EMC_STA_CFG0_Val STR R4, [R0, #EMC_STA_CFG0_OFS] LDR R4, =EMC_STA_WWEN0_Val STR R4, [R0, #EMC_STA_WWEN0_OFS] LDR R4, =EMC_STA_WOEN0_Val STR R4, [R0, #EMC_STA_WOEN0_OFS] LDR R4, =EMC_STA_WRD0_Val STR R4, [R0, #EMC_STA_WRD0_OFS] LDR R4, =EMC_STA_WPAGE0_Val STR R4, [R0, #EMC_STA_WPAGE0_OFS] LDR R4, =EMC_STA_WWR0_Val STR R4, [R0, #EMC_STA_WWR0_OFS] LDR R4, =EMC_STA_WTURN0_Val STR R4, [R0, #EMC_STA_WTURN0_OFS] ENDIF IF (EMC_STACS1_SETUP != 0) LDR R4, =EMC_STA_CFG1_Val STR R4, [R0, #EMC_STA_CFG1_OFS] LDR R4, =EMC_STA_WWEN1_Val STR R4, [R0, #EMC_STA_WWEN1_OFS] LDR R4, =EMC_STA_WOEN1_Val STR R4, [R0, #EMC_STA_WOEN1_OFS] LDR R4, =EMC_STA_WRD1_Val STR R4, [R0, #EMC_STA_WRD1_OFS] LDR R4, =EMC_STA_WPAGE1_Val STR R4, [R0, #EMC_STA_WPAGE1_OFS] LDR R4, =EMC_STA_WWR1_Val STR R4, [R0, #EMC_STA_WWR1_OFS] LDR R4, =EMC_STA_WTURN1_Val STR R4, [R0, #EMC_STA_WTURN1_OFS] ENDIF IF (EMC_STACS2_SETUP != 0) LDR R4, =EMC_STA_CFG2_Val STR R4, [R0, #EMC_STA_CFG2_OFS] LDR R4, =EMC_STA_WWEN2_Val STR R4, [R0, #EMC_STA_WWEN2_OFS] LDR R4, =EMC_STA_WOEN2_Val STR R4, [R0, #EMC_STA_WOEN2_OFS] LDR R4, =EMC_STA_WRD2_Val STR R4, [R0, #EMC_STA_WRD2_OFS] LDR R4, =EMC_STA_WPAGE2_Val STR R4, [R0, #EMC_STA_WPAGE2_OFS] LDR R4, =EMC_STA_WWR2_Val STR R4, [R0, #EMC_STA_WWR2_OFS] LDR R4, =EMC_STA_WTURN2_Val STR R4, [R0, #EMC_STA_WTURN2_OFS] ENDIF IF (EMC_STACS3_SETUP != 0) LDR R4, =EMC_STA_CFG3_Val STR R4, [R0, #EMC_STA_CFG3_OFS] LDR R4, =EMC_STA_WWEN3_Val STR R4, [R0, #EMC_STA_WWEN3_OFS] LDR R4, =EMC_STA_WOEN3_Val STR R4, [R0, #EMC_STA_WOEN3_OFS] LDR R4, =EMC_STA_WRD3_Val STR R4, [R0, #EMC_STA_WRD3_OFS] LDR R4, =EMC_STA_WPAGE3_Val STR R4, [R0, #EMC_STA_WPAGE3_OFS] LDR R4, =EMC_STA_WWR3_Val STR R4, [R0, #EMC_STA_WWR3_OFS] LDR R4, =EMC_STA_WTURN3_Val STR R4, [R0, #EMC_STA_WTURN3_OFS] ENDIF LDR R6, =144000 ; Number of cycles to delay Wait_5 SUBS R6, R6, #1 ; Delay ~10 ms @ proc clk 57.6 MHz BNE Wait_5 LDR R4, =EMC_STA_EXT_W_Val LDR R5, =EMC_STA_EXT_W_OFS ADD R5, R5, R0 STR R4, [R5, #0] ENDIF ; EMC_STATIC_SETUP ENDIF ; EMC_SETUP ; Copy Exception Vectors to Internal RAM --------------------------------------- IF :DEF:RAM_INTVEC ADR R8, Vectors ; Source LDR R9, =RAM_BASE ; Destination LDMIA R8!, {R0-R7} ; Load Vectors STMIA R9!, {R0-R7} ; Store Vectors LDMIA R8!, {R0-R7} ; Load Handler Addresses STMIA R9!, {R0-R7} ; Store Handler Addresses ENDIF ; Memory Mapping (when Interrupt Vectors are in RAM) --------------------------- MEMMAP EQU 0xE01FC040 ; Memory Mapping Control IF :DEF:REMAP LDR R0, =MEMMAP IF :DEF:EXTMEM_MODE MOV R1, #3 ELIF :DEF:RAM_MODE MOV R1, #2 ELSE MOV R1, #1 ENDIF STR R1, [R0] ENDIF ; Setup Stack for each mode ---------------------------------------------------- LDR R0, =Stack_Top ; Enter Undefined Instruction Mode and set its Stack Pointer MSR CPSR_c, #Mode_UND:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #UND_Stack_Size ; Enter Abort Mode and set its Stack Pointer MSR CPSR_c, #Mode_ABT:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #ABT_Stack_Size ; Enter FIQ Mode and set its Stack Pointer MSR CPSR_c, #Mode_FIQ:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #FIQ_Stack_Size ; Enter IRQ Mode and set its Stack Pointer MSR CPSR_c, #Mode_IRQ:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #IRQ_Stack_Size ; Enter Supervisor Mode and set its Stack Pointer MSR CPSR_c, #Mode_SVC:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #SVC_Stack_Size IF :DEF:__MICROLIB EXPORT __initial_sp ELSE ENDIF ; Enter the C code ------------------------------------------------------------- IMPORT __main LDR R0, =__main BX R0 IMPORT rt_interrupt_enter IMPORT rt_interrupt_leave IMPORT rt_thread_switch_interrupt_flag IMPORT rt_interrupt_from_thread IMPORT rt_interrupt_to_thread IMPORT rt_hw_trap_irq IRQ_Handler PROC EXPORT IRQ_Handler STMFD sp!, {r0-r12,lr} BL rt_interrupt_enter BL rt_hw_trap_irq BL rt_interrupt_leave ; if rt_thread_switch_interrupt_flag set, jump to ; rt_hw_context_switch_interrupt_do and don't return LDR r0, =rt_thread_switch_interrupt_flag LDR r1, [r0] CMP r1, #1 BEQ rt_hw_context_switch_interrupt_do LDMFD sp!, {r0-r12,lr} SUBS pc, lr, #4 ENDP ; /* ; * void rt_hw_context_switch_interrupt_do(rt_base_t flag) ; */ rt_hw_context_switch_interrupt_do PROC EXPORT rt_hw_context_switch_interrupt_do MOV r1, #0 ; clear flag STR r1, [r0] LDMFD sp!, {r0-r12,lr}; reload saved registers STMFD sp!, {r0-r3} ; save r0-r3 MOV r1, sp ADD sp, sp, #16 ; restore sp SUB r2, lr, #4 ; save old task's pc to r2 MRS r3, spsr ; get cpsr of interrupt thread ; switch to SVC mode and no interrupt MSR cpsr_c, #I_Bit :OR: F_Bit :OR: Mode_SVC STMFD sp!, {r2} ; push old task's pc STMFD sp!, {r4-r12,lr}; push old task's lr,r12-r4 MOV r4, r1 ; Special optimised code below MOV r5, r3 LDMFD r4!, {r0-r3} STMFD sp!, {r0-r3} ; push old task's r3-r0 STMFD sp!, {r5} ; push old task's cpsr LDR r4, =rt_interrupt_from_thread LDR r5, [r4] STR sp, [r5] ; store sp in preempted tasks's TCB LDR r6, =rt_interrupt_to_thread LDR r6, [r6] LDR sp, [r6] ; get new task's stack pointer LDMFD sp!, {r4} ; pop new task's cpsr to spsr MSR spsr_cxsf, r4 BIC r4, r4, #0x20 ; must be ARM mode MSR cpsr_cxsf, r4 LDMFD sp!, {r0-r12,lr,pc}^ ; pop new task's r0-r12,lr & pc, copy spsr to cpsr ENDP IF :DEF:__MICROLIB EXPORT __heap_base EXPORT __heap_limit ELSE ; User Initial Stack & Heap AREA |.text|, CODE, READONLY IMPORT __use_two_region_memory EXPORT __user_initial_stackheap __user_initial_stackheap LDR R0, = Heap_Mem LDR R1, =(Stack_Mem + USR_Stack_Size) LDR R2, = (Heap_Mem + Heap_Size) LDR R3, = Stack_Mem BX LR ENDIF END