;/*****************************************************************************/ ;/* S3C2440.S: Startup file for Samsung S3C440 */ ;/*****************************************************************************/ ;/* <<< Use Configuration Wizard in Context Menu >>> */ ;/*****************************************************************************/ ;/* This file is part of the uVision/ARM development tools. */ ;/* Copyright (c) 2005-2008 Keil Software. 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 S3C2440.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_MC_SETUP: when set the startup code will not initialize Memory ; * Controller (used mostly when clock is already initialized from script ; * .ini file). ; * ; * NO_GP_SETUP: when set the startup code will not initialize General Ports ; * (used mostly when clock is already initialized from script .ini ; * file). ; * ; * RAM_INTVEC: when set the startup code copies exception vectors ; * from execution address to on-chip RAM. ; */ ; 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 ;----------------------- 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 ;----------------------- Memory Definitions ------------------------------------ ; Internal Memory Base Addresses IRAM_BASE EQU 0x40000000 ;----------------------- Watchdog Timer Definitions ---------------------------- WT_BASE EQU 0x53000000 ; Watchdog Timer Base Address WTCON_OFS EQU 0x00 ; Watchdog Timer Control Register Offset WTDAT_OFS EQU 0x04 ; Watchdog Timer Data Register Offset WTCNT_OFS EQU 0x08 ; Watchdog Timer Count Register Offset ;// Watchdog Timer Setup ;// Watchdog Timer Control Register (WTCON) ;// Prescaler Value <0-255> ;// Watchdog Timer Enable ;// Clock Division Factor ;// <0=> 16 <1=> 32 <2=> 64 <3=> 128 ;// Interrupt Generation Enable ;// Reset Enable ;// ;// Watchdog Timer Data Register (WTDAT) ;// Count Reload Value <0-65535> ;// ;// Watchdog Timer Setup WT_SETUP EQU 1 WTCON_Val EQU 0x00000000 WTDAT_Val EQU 0x00008000 ;----------------------- Clock and Power Management Definitions ---------------- CLOCK_BASE EQU 0x4C000000 ; Clock Base Address LOCKTIME_OFS EQU 0x00 ; PLL Lock Time Count Register Offset MPLLCON_OFS EQU 0x04 ; MPLL Configuration Register Offset UPLLCON_OFS EQU 0x08 ; UPLL Configuration Register Offset CLKCON_OFS EQU 0x0C ; Clock Generator Control Reg Offset CLKSLOW_OFS EQU 0x10 ; Clock Slow Control Register Offset CLKDIVN_OFS EQU 0x14 ; Clock Divider Control Register Offset CAMDIVN_OFS EQU 0x18 ; Camera Clock Divider Register Offset ;// Clock Setup ;// PLL Lock Time Count Register (LOCKTIME) ;// U_LTIME: UPLL Lock Time Count Value for UCLK <0x0-0xFFFF> ;// M_LTIME: MPLL Lock Time Count Value for FCLK, HCLK and PCLK <0x0-0xFFFF> ;// ;// MPLL Configuration Register (MPLLCON) ;// MPLL = (2 * m * Fin) / (p * 2^s) ;// m: Main Divider m Value <9-256><#-8> ;// m = MDIV + 8 ;// p: Pre-divider p Value <3-64><#-2> ;// p = PDIV + 2 ;// s: Post Divider s Value <0-3> ;// s = SDIV ;// ;// UPLL Configuration Register (UPLLCON) ;// UPLL = ( m * Fin) / (p * 2^s) ;// m: Main Divider m Value <8-263><#-8> ;// m = MDIV + 8 ;// p: Pre-divider p Value <2-65><#-2> ;// p = PDIV + 2 ;// s: Post Divider s Value <0-3> ;// s = SDIV ;// ;// Clock Generation Control Register (CLKCON) ;// AC97 Enable ;// Camera Enable ;// SPI Enable ;// IIS Enable ;// IIC Enable ;// ADC + Touch Screen Enable ;// RTC Enable ;// GPIO Enable ;// UART2 Enable ;// UART1 Enable ;// UART0 Enable ;// SDI Enable ;// PWMTIMER Enable ;// USB Device Enable ;// USB Host Enable ;// LCDC Enable ;// NAND FLASH Controller Enable ;// SLEEP Enable ;// IDLE BIT Enable ;// ;// Clock Slow Control Register (CLKSLOW) ;// UCLK_ON: UCLK ON ;// MPLL_OFF: Turn off PLL ;// SLOW_BIT: Slow Mode Enable ;// SLOW_VAL: Slow Clock Divider <0-7> ;// ;// Clock Divider Control Register (CLKDIVN) ;// DIVN_UPLL: UCLK Select ;// <0=> UCLK = UPLL clock ;// <1=> UCLK = UPLL clock / 2 ;// HDIVN: HCLK Select ;// <0=> HCLK = FCLK ;// <1=> HCLK = FCLK / 2 ;// <2=> HCLK = FCLK / 4 if HCLK4_HALF = 0 in CAMDIVN, else HCLK = FCLK / 8 ;// <3=> HCLK = FCLK / 3 if HCLK3_HALF = 0 in CAMDIVN, else HCLK = FCLK / 6 ;// PDIVN: PCLK Select ;// <0=> PCLK = HCLK ;// <1=> PCLK = HCLK / 2 ;// ;// Camera Clock Divider Control Register (CAMDIVN) ;// DVS_EN: ARM Core Clock Select ;// <0=> ARM core runs at FCLK ;// <1=> ARM core runs at HCLK ;// HCLK4_HALF: HDIVN Division Rate Change Bit ;// <0=> If HDIVN = 2 in CLKDIVN then HCLK = FCLK / 4 ;// <1=> If HDIVN = 2 in CLKDIVN then HCLK = FCLK / 8 ;// HCLK3_HALF: HDIVN Division Rate Change Bit ;// <0=> If HDIVN = 3 in CLKDIVN then HCLK = FCLK / 3 ;// <1=> If HDIVN = 3 in CLKDIVN then HCLK = FCLK / 6 ;// CAMCLK Select ;// <0=> CAMCLK = UPLL ;// <1=> CAMCLK = UPLL / CAMCLK_DIV ;// CAMCLK_DIV: CAMCLK Divider <0-15> ;// Camera Clock = UPLL / (2 * (CAMCLK_DIV + 1)) ;// Divider is used only if CAMCLK_SEL = 1 ;// ;// Clock Setup CLOCK_SETUP EQU 0 LOCKTIME_Val EQU 0x0FFF0FFF MPLLCON_Val EQU 0x00043011 UPLLCON_Val EQU 0x00038021 CLKCON_Val EQU 0x001FFFF0 CLKSLOW_Val EQU 0x00000004 CLKDIVN_Val EQU 0x0000000F CAMDIVN_Val EQU 0x00000000 ;----------------------- Memory Controller Definitions ------------------------- MC_BASE EQU 0x48000000 ; Memory Controller Base Address BWSCON_OFS EQU 0x00 ; Bus Width and Wait Status Ctrl Offset BANKCON0_OFS EQU 0x04 ; Bank 0 Control Register Offset BANKCON1_OFS EQU 0x08 ; Bank 1 Control Register Offset BANKCON2_OFS EQU 0x0C ; Bank 2 Control Register Offset BANKCON3_OFS EQU 0x10 ; Bank 3 Control Register Offset BANKCON4_OFS EQU 0x14 ; Bank 4 Control Register Offset BANKCON5_OFS EQU 0x18 ; Bank 5 Control Register Offset BANKCON6_OFS EQU 0x1C ; Bank 6 Control Register Offset BANKCON7_OFS EQU 0x20 ; Bank 7 Control Register Offset REFRESH_OFS EQU 0x24 ; SDRAM Refresh Control Register Offset BANKSIZE_OFS EQU 0x28 ; Flexible Bank Size Register Offset MRSRB6_OFS EQU 0x2C ; Bank 6 Mode Register Offset MRSRB7_OFS EQU 0x30 ; Bank 7 Mode Register Offset ;// Memory Controller Setup ;// Bus Width and Wait Control Register (BWSCON) ;// ST7: Use UB/LB for Bank 7 ;// WS7: Enable Wait Status for Bank 7 ;// DW7: Data Bus Width for Bank 7 ;// <0=> 8-bit <1=> 16-bit <2=> 32-bit <3=> Reserved ;// ST6: Use UB/LB for Bank 6 ;// WS6: Enable Wait Status for Bank 6 ;// DW6: Data Bus Width for Bank 6 ;// <0=> 8-bit <1=> 16-bit <2=> 32-bit <3=> Reserved ;// ST5: Use UB/LB for Bank 5 ;// WS5: Enable Wait Status for Bank 5 ;// DW5: Data Bus Width for Bank 5 ;// <0=> 8-bit <1=> 16-bit <2=> 32-bit <3=> Reserved ;// ST4: Use UB/LB for Bank 4 ;// WS4: Enable Wait Status for Bank 4 ;// DW4: Data Bus Width for Bank 4 ;// <0=> 8-bit <1=> 16-bit <2=> 32-bit <3=> Reserved ;// ST3: Use UB/LB for Bank 3 ;// WS3: Enable Wait Status for Bank 3 ;// DW3: Data Bus Width for Bank 3 ;// <0=> 8-bit <1=> 16-bit <2=> 32-bit <3=> Reserved ;// ST2: Use UB/LB for Bank 2 ;// WS2: Enable Wait Status for Bank 2 ;// DW2: Data Bus Width for Bank 2 ;// <0=> 8-bit <1=> 16-bit <2=> 32-bit <3=> Reserved ;// ST1: Use UB/LB for Bank 1 ;// WS1: Enable Wait Status for Bank 1 ;// DW1: Data Bus Width for Bank 1 ;// <0=> 8-bit <1=> 16-bit <2=> 32-bit <3=> Reserved ;// DW0: Indicate Data Bus Width for Bank 0 ;// <1=> 16-bit <2=> 32-bit ;// ;// Bank 0 Control Register (BANKCON0) ;// Tacs: Address Set-up Time before nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcos: Chip Selection Set-up Time before nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacc: Access Cycle ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks <3=> 4 clocks ;// <4=> 6 clocks <5=> 8 clocks <6=> 10 clocks <7=> 14 clocks ;// Tcoh: Chip Selection Hold Time after nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcah: Address Hold Time after nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacp: Page Mode Access Cycle at Page Mode ;// <0=> 2 clocks <1=> 3 clocks <2=> 4 clocks <3=> 6 clocks ;// PMC: Page Mode Configuration ;// <0=> normal (1 data) <1=> 4 data <2=> 8 data <3=> 16 data ;// ;// Bank 1 Control Register (BANKCON1) ;// Tacs: Address Set-up Time before nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcos: Chip Selection Set-up Time before nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacc: Access Cycle ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks <3=> 4 clocks ;// <4=> 6 clocks <5=> 8 clocks <6=> 10 clocks <7=> 14 clocks ;// Tcoh: Chip Selection Hold Time after nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcah: Address Hold Time after nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacp: Page Mode Access Cycle at Page Mode ;// <0=> 2 clocks <1=> 3 clocks <2=> 4 clocks <3=> 6 clocks ;// PMC: Page Mode Configuration ;// <0=> normal (1 data) <1=> 4 data <2=> 8 data <3=> 16 data ;// ;// Bank 2 Control Register (BANKCON2) ;// Tacs: Address Set-up Time before nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcos: Chip Selection Set-up Time before nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacc: Access Cycle ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks <3=> 4 clocks ;// <4=> 6 clocks <5=> 8 clocks <6=> 10 clocks <7=> 14 clocks ;// Tcoh: Chip Selection Hold Time after nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcah: Address Hold Time after nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacp: Page Mode Access Cycle at Page Mode ;// <0=> 2 clocks <1=> 3 clocks <2=> 4 clocks <3=> 6 clocks ;// PMC: Page Mode Configuration ;// <0=> normal (1 data) <1=> 4 data <2=> 8 data <3=> 16 data ;// ;// Bank 3 Control Register (BANKCON3) ;// Tacs: Address Set-up Time before nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcos: Chip Selection Set-up Time before nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacc: Access Cycle ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks <3=> 4 clocks ;// <4=> 6 clocks <5=> 8 clocks <6=> 10 clocks <7=> 14 clocks ;// Tcoh: Chip Selection Hold Time after nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcah: Address Hold Time after nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacp: Page Mode Access Cycle at Page Mode ;// <0=> 2 clocks <1=> 3 clocks <2=> 4 clocks <3=> 6 clocks ;// PMC: Page Mode Configuration ;// <0=> normal (1 data) <1=> 4 data <2=> 8 data <3=> 16 data ;// ;// Bank 4 Control Register (BANKCON4) ;// Tacs: Address Set-up Time before nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcos: Chip Selection Set-up Time before nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacc: Access Cycle ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks <3=> 4 clocks ;// <4=> 6 clocks <5=> 8 clocks <6=> 10 clocks <7=> 14 clocks ;// Tcoh: Chip Selection Hold Time after nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcah: Address Hold Time after nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacp: Page Mode Access Cycle at Page Mode ;// <0=> 2 clocks <1=> 3 clocks <2=> 4 clocks <3=> 6 clocks ;// PMC: Page Mode Configuration ;// <0=> normal (1 data) <1=> 4 data <2=> 8 data <3=> 16 data ;// ;// Bank 5 Control Register (BANKCON5) ;// Tacs: Address Set-up Time before nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcos: Chip Selection Set-up Time before nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacc: Access Cycle ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks <3=> 4 clocks ;// <4=> 6 clocks <5=> 8 clocks <6=> 10 clocks <7=> 14 clocks ;// Tcoh: Chip Selection Hold Time after nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcah: Address Hold Time after nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacp: Page Mode Access Cycle at Page Mode ;// <0=> 2 clocks <1=> 3 clocks <2=> 4 clocks <3=> 6 clocks ;// PMC: Page Mode Configuration ;// <0=> normal (1 data) <1=> 4 data <2=> 8 data <3=> 16 data ;// ;// Bank 6 Control Register (BANKCON6) ;// Memory Type Selection ;// <0=> ROM or SRAM <3=> SDRAM ;// Tacs: Address Set-up Time before nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcos: Chip Selection Set-up Time before nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacc: Access Cycle ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks <3=> 4 clocks ;// <4=> 6 clocks <5=> 8 clocks <6=> 10 clocks <7=> 14 clocks ;// Tcoh: Chip Selection Hold Time after nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcah: Address Hold Time after nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacp/Trcd: Page Mode Access Cycle at Page Mode / RAS to CAS Delay ;// Parameter depends on Memory Type: if type SRAM then parameter is Tacp, ;// if type is SDRAM then parameter is Trcd ;// For SDRAM 6 cycles setting is not allowed ;// <0=> 2 clocks <1=> 3 clocks <2=> 4 clocks <3=> 6 clocks ;// PMC/SCAN: Page Mode Configuration / Column Address Number <0-3> ;// Parameter depends on Memory Type: if type SRAM then parameter is PMC, ;// if type is SDRAM then parameter is SCAN ;// ;// Bank 7 Control Register (BANKCON7) ;// Memory Type Selection ;// <0=> ROM or SRAM <3=> SDRAM ;// Tacs: Address Set-up Time before nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcos: Chip Selection Set-up Time before nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacc: Access Cycle ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks <3=> 4 clocks ;// <4=> 6 clocks <5=> 8 clocks <6=> 10 clocks <7=> 14 clocks ;// Tcoh: Chip Selection Hold Time after nOE ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tcah: Address Hold Time after nGCS ;// <0=> 0 clocks <1=> 1 clocks <2=> 2 clocks <3=> 4 clocks ;// Tacp/Trcd: Page Mode Access Cycle at Page Mode / RAS to CAS Delay ;// Parameter depends on Memory Type: if type SRAM then parameter is Tacp, ;// if type is SDRAM then parameter is Trcd ;// For SDRAM 6 cycles setting is not allowed ;// <0=> 2 clocks <1=> 3 clocks <2=> 4 clocks <3=> 6 clocks ;// PMC/SCAN: Page Mode Configuration / Column Address Number <0-3> ;// Parameter depends on Memory Type: if type SRAM then parameter is PMC, ;// if type is SDRAM then parameter is SCAN ;// ;// SDRAM Refresh Control Register (REFRESH) ;// REFEN: SDRAM Refresh Enable ;// TREFMD: SDRAM Refresh Mode ;// <0=> CBR/Auto Refresh <1=> Self Refresh ;// Trp: SDRAM RAS Pre-charge Time ;// <0=> 2 clocks <1=> 3 clocks <2=> 4 clocks <3=> Reserved ;// Tsrc: SDRAM Semi Row Cycle Time ;// SDRAM Row cycle time: Trc = Tsrc + Trp ;// <0=> 4 clocks <1=> 5 clocks <2=> 6 clocks <3=> 7 clocks ;// Refresh Counter <0-1023> ;// Refresh Period = (2048 - Refresh Count + 1) / HCLK ;// ;// Flexible Bank Size Register (BANKSIZE) ;// BURST_EN: ARM Core Burst Operation Enable ;// SCKE_EN: SDRAM Power Down Mode Enable ;// SCLK_EN: SCLK Enabled During SDRAM Access Cycle ;// <0=> SCLK is always active <1=> SCLK is active only during the access ;// BK76MAP: BANK6 and BANK7 Memory Map ;// <0=> 32MB / 32MB <1=> 64MB / 64MB <2=> 128MB / 128MB ;// <4=> 2MB / 2MB <5=> 4MB / 4MB <6=> 8MB / 8MB <7=> 16MB / 16MB ;// Refresh Counter <0-1023> ;// Refresh Period = (2048 - Refresh Count + 1) / HCLK ;// ;// SDRAM Mode Register Set Register 6 (MRSRB6) ;// WBL: Write Burst Length ;// <0=> Burst (Fixed) ;// TM: Test Mode ;// <0=> Mode register set (Fixed) ;// CL: CAS Latency ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks ;// BT: Burst Type ;// <0=> Sequential (Fixed) ;// BL: Burst Length ;// <0=> 1 (Fixed) ;// ;// SDRAM Mode Register Set Register 7 (MRSRB7) ;// WBL: Write Burst Length ;// <0=> Burst (Fixed) ;// TM: Test Mode ;// <0=> Mode register set (Fixed) ;// CL: CAS Latency ;// <0=> 1 clocks <1=> 2 clocks <2=> 3 clocks ;// BT: Burst Type ;// <0=> Sequential (Fixed) ;// BL: Burst Length ;// <0=> 1 (Fixed) ;// ;// Memory Controller Setup MC_SETUP EQU 0 BWSCON_Val EQU 0x22000000 BANKCON0_Val EQU 0x00000700 BANKCON1_Val EQU 0x00000700 BANKCON2_Val EQU 0x00000700 BANKCON3_Val EQU 0x00000700 BANKCON4_Val EQU 0x00000700 BANKCON5_Val EQU 0x00000700 BANKCON6_Val EQU 0x00018005 BANKCON7_Val EQU 0x00018005 REFRESH_Val EQU 0x008404F3 BANKSIZE_Val EQU 0x00000032 MRSRB6_Val EQU 0x00000020 MRSRB7_Val EQU 0x00000020 ;----------------------- I/O Port Definitions ---------------------------------- GPA_BASE EQU 0x56000000 ; GPA Base Address GPB_BASE EQU 0x56000010 ; GPB Base Address GPC_BASE EQU 0x56000020 ; GPC Base Address GPD_BASE EQU 0x56000030 ; GPD Base Address GPE_BASE EQU 0x56000040 ; GPE Base Address GPF_BASE EQU 0x56000050 ; GPF Base Address GPG_BASE EQU 0x56000060 ; GPG Base Address GPH_BASE EQU 0x56000070 ; GPH Base Address GPJ_BASE EQU 0x560000D0 ; GPJ Base Address GPCON_OFS EQU 0x00 ; Control Register Offset GPDAT_OFS EQU 0x04 ; Data Register Offset GPUP_OFS EQU 0x08 ; Pull-up Disable Register Offset ;// I/O Setup GP_SETUP EQU 0 ;// Port A Settings ;// Port A Control Register (GPACON) ;// GPA22 <0=> Output <1=> nFCE ;// GPA21 <0=> Output <1=> nRSTOUT ;// GPA20 <0=> Output <1=> nFRE ;// GPA19 <0=> Output <1=> nFWE ;// GPA18 <0=> Output <1=> ALE ;// GPA17 <0=> Output <1=> CLE ;// GPA16 <0=> Output <1=> nGCS[5] ;// GPA15 <0=> Output <1=> nGCS[4] ;// GPA14 <0=> Output <1=> nGCS[3] ;// GPA13 <0=> Output <1=> nGCS[2] ;// GPA12 <0=> Output <1=> nGCS[1] ;// GPA11 <0=> Output <1=> ADDR26 ;// GPA10 <0=> Output <1=> ADDR25 ;// GPA9 <0=> Output <1=> ADDR24 ;// GPA8 <0=> Output <1=> ADDR23 ;// GPA7 <0=> Output <1=> ADDR22 ;// GPA6 <0=> Output <1=> ADDR21 ;// GPA5 <0=> Output <1=> ADDR20 ;// GPA4 <0=> Output <1=> ADDR19 ;// GPA3 <0=> Output <1=> ADDR18 ;// GPA2 <0=> Output <1=> ADDR17 ;// GPA1 <0=> Output <1=> ADDR16 ;// GPA0 <0=> Output <1=> ADDR0 ;// ;// GPA_SETUP EQU 0 GPACON_Val EQU 0x000003FF ;// Port B Settings ;// Port B Control Register (GPBCON) ;// GPB10 <0=> Input <1=> Output <2=> nXDREQ0 <3=> Reserved ;// GPB9 <0=> Input <1=> Output <2=> nXDACK0 <3=> Reserved ;// GPB8 <0=> Input <1=> Output <2=> nXDREQ1 <3=> Reserved ;// GPB7 <0=> Input <1=> Output <2=> nXDACK1 <3=> Reserved ;// GPB6 <0=> Input <1=> Output <2=> nXBREQ <3=> Reserved ;// GPB5 <0=> Input <1=> Output <2=> nXBACK <3=> Reserved ;// GPB4 <0=> Input <1=> Output <2=> TCLK[0] <3=> Reserved ;// GPB3 <0=> Input <1=> Output <2=> TOUT3 <3=> Reserved ;// GPB2 <0=> Input <1=> Output <2=> TOUT2 <3=> Reserved ;// GPB1 <0=> Input <1=> Output <2=> TOUT1 <3=> Reserved ;// GPB0 <0=> Input <1=> Output <2=> TOUT0 <3=> Reserved ;// ;// Port B Pull-up Settings Register (GPBUP) ;// GPB10 Pull-up Disable ;// GPB9 Pull-up Disable ;// GPB8 Pull-up Disable ;// GPB7 Pull-up Disable ;// GPB6 Pull-up Disable ;// GPB5 Pull-up Disable ;// GPB4 Pull-up Disable ;// GPB3 Pull-up Disable ;// GPB2 Pull-up Disable ;// GPB1 Pull-up Disable ;// GPB0 Pull-up Disable ;// ;// GPB_SETUP EQU 0 GPBCON_Val EQU 0x00000000 GPBUP_Val EQU 0x00000000 ;// Port C Settings ;// Port C Control Register (GPCCON) ;// GPC15 <0=> Input <1=> Output <2=> VD[7] <3=> Reserved ;// GPC14 <0=> Input <1=> Output <2=> VD[6] <3=> Reserved ;// GPC13 <0=> Input <1=> Output <2=> VD[5] <3=> Reserved ;// GPC12 <0=> Input <1=> Output <2=> VD[4] <3=> Reserved ;// GPC11 <0=> Input <1=> Output <2=> VD[3] <3=> Reserved ;// GPC10 <0=> Input <1=> Output <2=> VD[2] <3=> Reserved ;// GPC9 <0=> Input <1=> Output <2=> VD[1] <3=> Reserved ;// GPC8 <0=> Input <1=> Output <2=> VD[0] <3=> Reserved ;// GPC7 <0=> Input <1=> Output <2=> LCD_LPCREVB <3=> Reserved ;// GPC6 <0=> Input <1=> Output <2=> LCD_LPCREV <3=> Reserved ;// GPC5 <0=> Input <1=> Output <2=> LCD_LPCOE <3=> Reserved ;// GPC4 <0=> Input <1=> Output <2=> VM <3=> I2SSDI ;// GPC3 <0=> Input <1=> Output <2=> VFRAME <3=> Reserved ;// GPC2 <0=> Input <1=> Output <2=> VLINE <3=> Reserved ;// GPC1 <0=> Input <1=> Output <2=> VCLK <3=> Reserved ;// GPC0 <0=> Input <1=> Output <2=> LEND <3=> Reserved ;// ;// Port C Pull-up Settings Register (GPCUP) ;// GPC15 Pull-up Disable ;// GPC14 Pull-up Disable ;// GPC13 Pull-up Disable ;// GPC12 Pull-up Disable ;// GPC11 Pull-up Disable ;// GPC10 Pull-up Disable ;// GPC9 Pull-up Disable ;// GPC8 Pull-up Disable ;// GPC7 Pull-up Disable ;// GPC6 Pull-up Disable ;// GPC5 Pull-up Disable ;// GPC4 Pull-up Disable ;// GPC3 Pull-up Disable ;// GPC2 Pull-up Disable ;// GPC1 Pull-up Disable ;// GPC0 Pull-up Disable ;// ;// GPC_SETUP EQU 0 GPCCON_Val EQU 0x00000000 GPCUP_Val EQU 0x00000000 ;// Port D Settings ;// Port D Control Register (GPDCON) ;// GPD15 <0=> Input <1=> Output <2=> VD[23] <3=> nSS0 ;// GPD14 <0=> Input <1=> Output <2=> VD[22] <3=> nSS1 ;// GPD13 <0=> Input <1=> Output <2=> VD[21] <3=> Reserved ;// GPD12 <0=> Input <1=> Output <2=> VD[20] <3=> Reserved ;// GPD11 <0=> Input <1=> Output <2=> VD[19] <3=> Reserved ;// GPD10 <0=> Input <1=> Output <2=> VD[18] <3=> SPICLK1 ;// GPD9 <0=> Input <1=> Output <2=> VD[17] <3=> SPIMOSI1 ;// GPD8 <0=> Input <1=> Output <2=> VD[16] <3=> SPIMISO1 ;// GPD7 <0=> Input <1=> Output <2=> VD[15] <3=> Reserved ;// GPD6 <0=> Input <1=> Output <2=> VD[14] <3=> Reserved ;// GPD5 <0=> Input <1=> Output <2=> VD[13] <3=> Reserved ;// GPD4 <0=> Input <1=> Output <2=> VD[12] <3=> Reserved ;// GPD3 <0=> Input <1=> Output <2=> VD[11] <3=> Reserved ;// GPD2 <0=> Input <1=> Output <2=> VD[10] <3=> Reserved ;// GPD1 <0=> Input <1=> Output <2=> VD[9] <3=> Reserved ;// GPD0 <0=> Input <1=> Output <2=> VD[8] <3=> Reserved ;// ;// Port D Pull-up Settings Register (GPDUP) ;// GPD15 Pull-up Disable ;// GPD14 Pull-up Disable ;// GPD13 Pull-up Disable ;// GPD12 Pull-up Disable ;// GPD11 Pull-up Disable ;// GPD10 Pull-up Disable ;// GPD9 Pull-up Disable ;// GPD8 Pull-up Disable ;// GPD7 Pull-up Disable ;// GPD6 Pull-up Disable ;// GPD5 Pull-up Disable ;// GPD4 Pull-up Disable ;// GPD3 Pull-up Disable ;// GPD2 Pull-up Disable ;// GPD1 Pull-up Disable ;// GPD0 Pull-up Disable ;// ;// GPD_SETUP EQU 0 GPDCON_Val EQU 0x00000000 GPDUP_Val EQU 0x00000000 ;// Port E Settings ;// Port E Control Register (GPECON) ;// GPE15 <0=> Input <1=> Output <2=> IICSDA <3=> Reserved ;// This pad is open-drain, and has no pull-up option. ;// GPE14 <0=> Input <1=> Output <2=> IICSCL <3=> Reserved ;// This pad is open-drain, and has no pull-up option. ;// GPE13 <0=> Input <1=> Output <2=> SPICLK0 <3=> Reserved ;// GPE12 <0=> Input <1=> Output <2=> SPIMOSI0 <3=> Reserved ;// GPE11 <0=> Input <1=> Output <2=> SPIMISO0 <3=> Reserved ;// GPE10 <0=> Input <1=> Output <2=> SDDAT3 <3=> Reserved ;// GPE9 <0=> Input <1=> Output <2=> SDDAT2 <3=> Reserved ;// GPE8 <0=> Input <1=> Output <2=> SDDAT1 <3=> Reserved ;// GPE7 <0=> Input <1=> Output <2=> SDDAT0 <3=> Reserved ;// GPE6 <0=> Input <1=> Output <2=> SDCMD <3=> Reserved ;// GPE5 <0=> Input <1=> Output <2=> SDCLK <3=> Reserved ;// GPE4 <0=> Input <1=> Output <2=> I2SDO <3=> AC_SDATA_OUT ;// GPE3 <0=> Input <1=> Output <2=> I2SDI <3=> AC_SDATA_IN ;// GPE2 <0=> Input <1=> Output <2=> CDCLK <3=> AC_nRESET ;// GPE1 <0=> Input <1=> Output <2=> I2SSCLK <3=> AC_BIT_CLK ;// GPE0 <0=> Input <1=> Output <2=> I2SLRCK <3=> AC_SYNC ;// ;// Port E Pull-up Settings Register (GPEUP) ;// GPE13 Pull-up Disable ;// GPE12 Pull-up Disable ;// GPE11 Pull-up Disable ;// GPE10 Pull-up Disable ;// GPE9 Pull-up Disable ;// GPE8 Pull-up Disable ;// GPE7 Pull-up Disable ;// GPE6 Pull-up Disable ;// GPE5 Pull-up Disable ;// GPE4 Pull-up Disable ;// GPE3 Pull-up Disable ;// GPE2 Pull-up Disable ;// GPE1 Pull-up Disable ;// GPE0 Pull-up Disable ;// ;// GPE_SETUP EQU 0 GPECON_Val EQU 0x00000000 GPEUP_Val EQU 0x00000000 ;// Port F Settings ;// Port F Control Register (GPFCON) ;// GPF7 <0=> Input <1=> Output <2=> EINT[7] <3=> Reserved ;// GPF6 <0=> Input <1=> Output <2=> EINT[6] <3=> Reserved ;// GPF5 <0=> Input <1=> Output <2=> EINT[5] <3=> Reserved ;// GPF4 <0=> Input <1=> Output <2=> EINT[4] <3=> Reserved ;// GPF3 <0=> Input <1=> Output <2=> EINT[3] <3=> Reserved ;// GPF2 <0=> Input <1=> Output <2=> EINT[2] <3=> Reserved ;// GPF1 <0=> Input <1=> Output <2=> EINT[1] <3=> Reserved ;// GPF0 <0=> Input <1=> Output <2=> EINT[0] <3=> Reserved ;// ;// Port F Pull-up Settings Register (GPFUP) ;// GPF7 Pull-up Disable ;// GPF6 Pull-up Disable ;// GPF5 Pull-up Disable ;// GPF4 Pull-up Disable ;// GPF3 Pull-up Disable ;// GPF2 Pull-up Disable ;// GPF1 Pull-up Disable ;// GPF0 Pull-up Disable ;// ;// GPF_SETUP EQU 0 GPFCON_Val EQU 0x00000000 GPFUP_Val EQU 0x00000000 ;// Port G Settings ;// Port G Control Register (GPGCON) ;// GPG15 <0=> Input <1=> Output <2=> EINT[23] <3=> Reserved ;// GPG14 <0=> Input <1=> Output <2=> EINT[22] <3=> Reserved ;// GPG13 <0=> Input <1=> Output <2=> EINT[21] <3=> Reserved ;// GPG12 <0=> Input <1=> Output <2=> EINT[20] <3=> Reserved ;// GPG11 <0=> Input <1=> Output <2=> EINT[19] <3=> TCLK[1] ;// GPG10 <0=> Input <1=> Output <2=> EINT[18] <3=> nCTS1 ;// GPG9 <0=> Input <1=> Output <2=> EINT[17] <3=> nRTS1 ;// GPG8 <0=> Input <1=> Output <2=> EINT[16] <3=> Reserved ;// GPG7 <0=> Input <1=> Output <2=> EINT[15] <3=> SPICLK1 ;// GPG6 <0=> Input <1=> Output <2=> EINT[14] <3=> SPIMOSI1 ;// GPG5 <0=> Input <1=> Output <2=> EINT[13] <3=> SPIMISO1 ;// GPG4 <0=> Input <1=> Output <2=> EINT[12] <3=> LCD_PWRDN ;// GPG3 <0=> Input <1=> Output <2=> EINT[11] <3=> nSS1 ;// GPG2 <0=> Input <1=> Output <2=> EINT[10] <3=> nSS0 ;// GPG1 <0=> Input <1=> Output <2=> EINT[9] <3=> Reserved ;// GPG0 <0=> Input <1=> Output <2=> EINT[8] <3=> Reserved ;// ;// Port G Pull-up Settings Register (GPGUP) ;// GPG15 Pull-up Disable ;// GPG14 Pull-up Disable ;// GPG13 Pull-up Disable ;// GPG12 Pull-up Disable ;// GPG11 Pull-up Disable ;// GPG10 Pull-up Disable ;// GPG9 Pull-up Disable ;// GPG8 Pull-up Disable ;// GPG7 Pull-up Disable ;// GPG6 Pull-up Disable ;// GPG5 Pull-up Disable ;// GPG4 Pull-up Disable ;// GPG3 Pull-up Disable ;// GPG2 Pull-up Disable ;// GPG1 Pull-up Disable ;// GPG0 Pull-up Disable ;// ;// GPG_SETUP EQU 0 GPGCON_Val EQU 0x00000000 GPGUP_Val EQU 0x00000000 ;// Port H Settings ;// Port H Control Register (GPHCON) ;// GPH10 <0=> Input <1=> Output <2=> CLKOUT1 <3=> Reserved ;// GPH9 <0=> Input <1=> Output <2=> CLKOUT0 <3=> Reserved ;// GPH8 <0=> Input <1=> Output <2=> UEXTCLK <3=> Reserved ;// GPH7 <0=> Input <1=> Output <2=> RXD[2] <3=> nCTS1 ;// GPH6 <0=> Input <1=> Output <2=> TXD[2] <3=> nRTS1 ;// GPH5 <0=> Input <1=> Output <2=> RXD[1] <3=> Reserved ;// GPH4 <0=> Input <1=> Output <2=> TXD[1] <3=> Reserved ;// GPH3 <0=> Input <1=> Output <2=> RXD[0] <3=> Reserved ;// GPH2 <0=> Input <1=> Output <2=> TXD[0] <3=> Reserved ;// GPH1 <0=> Input <1=> Output <2=> nRTS0 <3=> Reserved ;// GPH0 <0=> Input <1=> Output <2=> nCTS0 <3=> Reserved ;// ;// Port H Pull-up Settings Register (GPHUP) ;// GPH10 Pull-up Disable ;// GPH9 Pull-up Disable ;// GPH8 Pull-up Disable ;// GPH7 Pull-up Disable ;// GPH6 Pull-up Disable ;// GPH5 Pull-up Disable ;// GPH4 Pull-up Disable ;// GPH3 Pull-up Disable ;// GPH2 Pull-up Disable ;// GPH1 Pull-up Disable ;// GPH0 Pull-up Disable ;// ;// GPH_SETUP EQU 0 GPHCON_Val EQU 0x00000000 GPHUP_Val EQU 0x00000000 ;// Port J Settings ;// Port J Control Register (GPJCON) ;// GPJ12 <0=> Input <1=> Output <2=> CAMRESET <3=> Reserved ;// GPJ11 <0=> Input <1=> Output <2=> CAMCLKOUT <3=> Reserved ;// GPJ10 <0=> Input <1=> Output <2=> CAMHREF <3=> Reserved ;// GPJ9 <0=> Input <1=> Output <2=> CAMVSYNC <3=> Reserved ;// GPJ8 <0=> Input <1=> Output <2=> CAMPCLK <3=> Reserved ;// GPJ7 <0=> Input <1=> Output <2=> CAMDATA[7] <3=> Reserved ;// GPJ6 <0=> Input <1=> Output <2=> CAMDATA[6] <3=> Reserved ;// GPJ5 <0=> Input <1=> Output <2=> CAMDATA[5] <3=> Reserved ;// GPJ4 <0=> Input <1=> Output <2=> CAMDATA[4] <3=> Reserved ;// GPJ3 <0=> Input <1=> Output <2=> CAMDATA[3] <3=> Reserved ;// GPJ2 <0=> Input <1=> Output <2=> CAMDATA[2] <3=> Reserved ;// GPJ1 <0=> Input <1=> Output <2=> CAMDATA[1] <3=> Reserved ;// GPJ0 <0=> Input <1=> Output <2=> CAMDATA[0] <3=> Reserved ;// ;// Port J Pull-up Settings Register (GPJUP) ;// GPJ12 Pull-up Disable ;// GPJ11 Pull-up Disable ;// GPJ10 Pull-up Disable ;// GPJ9 Pull-up Disable ;// GPJ8 Pull-up Disable ;// GPJ7 Pull-up Disable ;// GPJ6 Pull-up Disable ;// GPJ5 Pull-up Disable ;// GPJ4 Pull-up Disable ;// GPJ3 Pull-up Disable ;// GPJ2 Pull-up Disable ;// GPJ1 Pull-up Disable ;// GPJ0 Pull-up Disable ;// ;// GPJ_SETUP EQU 0 GPJCON_Val EQU 0x00000000 GPJUP_Val EQU 0x00000000 ;// I/O Setup ;----------------------- CODE -------------------------------------------------- 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. EXPORT Entry_Point Entry_Point Vectors LDR PC, Reset_Addr LDR PC, Undef_Addr LDR PC, SWI_Addr LDR PC, PAbt_Addr LDR PC, DAbt_Addr NOP 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 Undef_Handler B Undef_Handler SWI_Handler B SWI_Handler PAbt_Handler B PAbt_Handler DAbt_Handler B DAbt_Handler FIQ_Handler B FIQ_Handler ; Reset Handler EXPORT Reset_Handler Reset_Handler ; Watchdog Setup --------------------------------------------------------------- IF WT_SETUP != 0 LDR R0, =WT_BASE LDR R1, =WTCON_Val LDR R2, =WTDAT_Val STR R2, [R0, #WTCNT_OFS] STR R2, [R0, #WTDAT_OFS] STR R1, [R0, #WTCON_OFS] ENDIF ; Clock Setup ------------------------------------------------------------------ IF (:LNOT:(:DEF:NO_CLOCK_SETUP)):LAND:(CLOCK_SETUP != 0) LDR R0, =CLOCK_BASE LDR R1, =LOCKTIME_Val STR R1, [R0, #LOCKTIME_OFS] MOV R1, #CLKDIVN_Val STR R1, [R0, #CLKDIVN_OFS] LDR R1, =CAMDIVN_Val STR R1, [R0, #CAMDIVN_OFS] LDR R1, =MPLLCON_Val STR R1, [R0, #MPLLCON_OFS] LDR R1, =UPLLCON_Val STR R1, [R0, #UPLLCON_OFS] MOV R1, #CLKSLOW_Val STR R1, [R0, #CLKSLOW_OFS] LDR R1, =CLKCON_Val STR R1, [R0, #CLKCON_OFS] ENDIF ; Memory Controller Setup ------------------------------------------------------ IF (:LNOT:(:DEF:NO_MC_SETUP)):LAND:(CLOCK_SETUP != 0) LDR R0, =MC_BASE LDR R1, =BWSCON_Val STR R1, [R0, #BWSCON_OFS] LDR R1, =BANKCON0_Val STR R1, [R0, #BANKCON0_OFS] LDR R1, =BANKCON1_Val STR R1, [R0, #BANKCON1_OFS] LDR R1, =BANKCON2_Val STR R1, [R0, #BANKCON2_OFS] LDR R1, =BANKCON3_Val STR R1, [R0, #BANKCON3_OFS] LDR R1, =BANKCON4_Val STR R1, [R0, #BANKCON4_OFS] LDR R1, =BANKCON5_Val STR R1, [R0, #BANKCON5_OFS] LDR R1, =BANKCON6_Val STR R1, [R0, #BANKCON6_OFS] LDR R1, =BANKCON7_Val STR R1, [R0, #BANKCON7_OFS] LDR R1, =REFRESH_Val STR R1, [R0, #REFRESH_OFS] MOV R1, #BANKSIZE_Val STR R1, [R0, #BANKSIZE_OFS] MOV R1, #MRSRB6_Val STR R1, [R0, #MRSRB6_OFS] MOV R1, #MRSRB7_Val STR R1, [R0, #MRSRB7_OFS] ENDIF ; I/O Pins Setup --------------------------------------------------------------- IF (:LNOT:(:DEF:NO_GP_SETUP)):LAND:(GP_SETUP != 0) IF GPA_SETUP != 0 LDR R0, =GPA_BASE LDR R1, =GPACON_Val STR R1, [R0, #GPCON_OFS] ENDIF IF GPB_SETUP != 0 LDR R0, =GPB_BASE LDR R1, =GPBCON_Val STR R1, [R0, #GPCON_OFS] LDR R1, =GPBUP_Val STR R1, [R0, #GPUP_OFS] ENDIF IF GPC_SETUP != 0 LDR R0, =GPC_BASE LDR R1, =GPCCON_Val STR R1, [R0, #GPCON_OFS] LDR R1, =GPCUP_Val STR R1, [R0, #GPUP_OFS] ENDIF IF GPD_SETUP != 0 LDR R0, =GPD_BASE LDR R1, =GPDCON_Val STR R1, [R0, #GPCON_OFS] LDR R1, =GPDUP_Val STR R1, [R0, #GPUP_OFS] ENDIF IF GPE_SETUP != 0 LDR R0, =GPE_BASE LDR R1, =GPECON_Val STR R1, [R0, #GPCON_OFS] LDR R1, =GPEUP_Val STR R1, [R0, #GPUP_OFS] ENDIF IF GPF_SETUP != 0 LDR R0, =GPF_BASE LDR R1, =GPFCON_Val STR R1, [R0, #GPCON_OFS] LDR R1, =GPFUP_Val STR R1, [R0, #GPUP_OFS] ENDIF IF GPG_SETUP != 0 LDR R0, =GPG_BASE LDR R1, =GPGCON_Val STR R1, [R0, #GPCON_OFS] LDR R1, =GPGUP_Val STR R1, [R0, #GPUP_OFS] ENDIF IF GPH_SETUP != 0 LDR R0, =GPH_BASE LDR R1, =GPHCON_Val STR R1, [R0, #GPCON_OFS] LDR R1, =GPHUP_Val STR R1, [R0, #GPUP_OFS] ENDIF IF GPJ_SETUP != 0 LDR R0, =GPJ_BASE LDR R1, =GPJCON_Val STR R1, [R0, #GPCON_OFS] LDR R1, =GPJUP_Val STR R1, [R0, #GPUP_OFS] ENDIF ENDIF ; Copy Exception Vectors to Internal RAM --------------------------------------- IF :DEF:RAM_INTVEC ADR R8, Vectors ; Source LDR R9, =IRAM_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 ; 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 ; Enter User Mode and set its Stack Pointer ; MSR CPSR_c, #Mode_USR MOV SP, R0 SUB SL, SP, #USR_Stack_Size ; Enter the C code ------------------------------------------------------------- IMPORT __main LDR R0, =__main BX R0 IMPORT rt_interrupt_enter IMPORT rt_interrupt_leave IMPORT rt_thread_switch_interrput_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_interrput_flag set, jump to ; rt_hw_context_switch_interrupt_do and don't return LDR r0, =rt_thread_switch_interrput_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|F_Bit|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 MRS r4, spsr STMFD sp!, {r4} ; push old task's spsr 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 spsr MSR spsr_cxsf, r4 LDMFD sp!, {r4} ; pop new task's psr MSR cpsr_cxsf, r4 LDMFD sp!, {r0-r12,lr,pc} ; pop new task's r0-r12,lr & pc 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