;/*****************************************************************************/
;/* LPC32x0.S: Startup file for Philips LPC32x0 device series                 */
;/*****************************************************************************/
;/* <<< 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 LPC32x0.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.
; *
; *  EMC_NO_INIT:   when set, the external memory controller is not initialized 
; *                 in startup (if 2-nd level bootloader is used this should 
; *                 set as bootloader already initializes SDRAM).
; *
; *  EMC_DYNAMIC_NO_INIT: when set, the dynamic memory interface of the 
; *                 external memory controller is not initialized in startup 
; *
; *  EMC_STATIC_NO_INIT:  when set, the static memory interface of the 
; *                 external memory controller is not initialized in startup 
; *
; *  NAND_NO_INIT:  when set, the NAND Flash controller is not initialized in 
; *                 startup (if 2-nd level bootloader is used this should 
; *                 be set as bootloader already initializes NAND Flash 
; *                 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 remaps exception vectors from
; *                 on-chip RAM to address 0.
; *
; */


; 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
IRAM_BASE       EQU     0x08000000
IROM_BASE       EQU     0x0C000000

; External Memory Base Addresses
DYN_MEM0_BASE   EQU     0x80000000   
DYN_MEM1_BASE   EQU     0xA0000000
STA_MEM0_BASE   EQU     0xE0000000
STA_MEM1_BASE   EQU     0xE1000000
STA_MEM2_BASE   EQU     0xE2000000
STA_MEM3_BASE   EQU     0xE3000000


; System Control User Interface
SYSTEM_BASE     EQU     0x40004000      ; System Control          Base Address
BOOT_MAP_OFS    EQU     0x14            ; Boot Map Control Reg    Address Offset
SDRAMCLK_CTRL_OFS EQU   0x68            ; SDRAM Clock Control Reg Address Offset
DDR_LAP_NOM_OFS   EQU   0x6C            ; DDR DQS Nominal Value   Address Offset
DDR_LAP_COUNT_OFS EQU   0x70            ; DDR Ring Osc Counter    Address Offset
DDR_CAL_DELAY_OFS EQU   0x74            ; DDR DQS Calibrate Value Address Offset

; Constants
REMAP_BIT       EQU     (1<<0)          ; Remap RAM to 0

;----------------------- Stack and Heap Definitions ----------------------------

;// <h> Stack Configuration (Stack Sizes in Bytes)
;//   <o0> Undefined Mode      <0x0-0xFFFFFFFF:8>
;//   <o1> Supervisor Mode     <0x0-0xFFFFFFFF:8>
;//   <o2> Abort Mode          <0x0-0xFFFFFFFF:8>
;//   <o3> Fast Interrupt Mode <0x0-0xFFFFFFFF:8>
;//   <o4> Interrupt Mode      <0x0-0xFFFFFFFF:8>
;//   <o5> User/System Mode    <0x0-0xFFFFFFFF:8>
;// </h>

UND_Stack_Size  EQU     0x00000000
SVC_Stack_Size  EQU     0x00000008
ABT_Stack_Size  EQU     0x00000000
FIQ_Stack_Size  EQU     0x00000000
IRQ_Stack_Size  EQU     0x00000080
USR_Stack_Size  EQU     0x00000400

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


;// <h> Heap Configuration
;//   <o>  Heap Size (in Bytes) <0x0-0xFFFFFFFF>
;// </h>

Heap_Size       EQU     0x00000000

                AREA    HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
Heap_Mem        SPACE   Heap_Size
__heap_limit


;----------------------- Clock Definitions -------------------------------------

; Clock User Interface
PWR_CTRL_OFS     EQU    0x44            ; Power Control Register  Address Offset
OSC_CTRL_OFS     EQU    0x4C            ; Main Oscilator Ctrl Reg Address Offset
SYSCLK_CTRL_OFS  EQU    0x50            ; SYSCLK Control Register Address Offset
PLL397_CTRL_OFS  EQU    0x48            ; PLL397 Control Register Address Offset
HCLKPLL_CTRL_OFS EQU    0x58            ; ARM and HCLK Ctrl Reg   Address Offset
HCLKDIV_CTRL_OFS EQU    0x40            ; HCLK Divider Settings   Address Offset

; Constants
NORMAL_RUN_BIT   EQU    (1<<2)          ; Run mode control                   bit
SYSCLK_PLL_BIT   EQU    (1<<1)          ; PLL397 used for system clock       bit
PLL_LOCK_BIT     EQU    (1<<0)          ; PLL locked                         bit
HCLKPLL_PD_BIT   EQU    (1<<16)         ; HCLK PLL power down mode           bit

;// <e> Clock Configuration
CLOCK_SETUP      EQU    1

;//   <h> Main Oscillator Control Register (OSC_CTRL)
;//     <e0.0>                     Main Oscillator Disable
;//     </e>
;//   </h>
OSC_CTRL_Val     EQU    0x00000000

;//   <h> SYSCLK Control Register (SYSCLK_CTRL)
;//     <o0.2..11>                 Bad Phase Length Before Clock Switching Trigger <0x000-0x3FF>
;//     <o0.1>                     Oscillator Switch
;//                   <0=> Switch to main oscillator
;//                   <1=> Switch to 13MHz clock source (PLL397 output)
;//   </h>
SYSCLK_CTRL_Val  EQU    0x00000140

;//   <h> PLL397 Control Register (PLL397_CTRL)
;//     <o0.1>                     PLL397 Operational Control
;//                   <0=> PLL397 is running
;//                   <1=> PLL397 is stopped and is in low power mode
;//   </h>
PLL397_CTRL_Val  EQU    0x00000000

;//   <h> HCLK PLL Control Register (HCLKPLL_CTRL)
;//     <i> Example for 208MHz PLL from 13MHz oscillator
;//     <i> settings:
;//     <i> - PLL Power Down: PLL in operating mode
;//     <i> - Bypass Control: CCO clock is sent to post-divider
;//     <i> - Direct Output Control: CCO clock is the direct output of the PLL
;//     <i> - Feedback Divider Path Control: don't care
;//     <i> - PLL Post-divider Settings (P): don't care
;//     <i> - PLL Pre-divider Settings (N): 1
;//     <i> - PLL Feedback Divider (M): 16
;//     <o0.16>                    PLL Power Down
;//                   <0=> PLL in power down mode
;//                   <1=> PLL in operating mode
;//     <o0.15>                    Bypass Control
;//                   <0=> CCO clock is sent to post-divider
;//                   <1=> PLL input bypasses the CCO
;//     <o0.14>                    Direct Output Control
;//                   <0=> The output of the post-divider is output of the PLL
;//                   <1=> CCO clock is the direct output of the PLL
;//     <o0.13>                    Feedback Divider Path Control
;//                   <0=> Clocked by CCO clock
;//                   <1=> Clocked by PLL_CLKOUT
;//     <o0.11..12>                PLL Post-divider Settings (P)
;//                   <0=> / 2 (P=1)
;//                   <1=> / 4 (P=2)
;//                   <2=> / 8 (P=4)
;//                   <3=> / 16 (P=8)
;//     <o0.9..10>                 PLL Pre-divider Settings (N)
;//                   <0=> 1
;//                   <1=> 2
;//                   <2=> 3
;//                   <3=> 4
;//     <o0.1..8>                  PLL Feedback Divider (M) 
;//                   <1-256><#-1>
;//   </h>
HCLKPLL_CTRL_Val EQU    0x0001401E

;//   <h> HCLK Divider Control Register (HCLKDIV_CTRL)
;//     <o0.7..8>                  DDRAM_CLK Control
;//                   <0=> Stopped
;//                   <1=> Nominal speed
;//                   <2=> Half speed
;//     <o0.2..6>                  PERIPH_CLK Divider Control <1-32><#-1>
;//                   <i>  PERIPH_CLK = ARM PLL clock / value
;//     <o0.0..1>                  HCLK Divider Control
;//                   <0=> HCLK = ARM PLL clock
;//                   <1=> HCLK = ARM PLL clock / 2
;//                   <2=> HCLK = ARM PLL clock / 4
;//   </h>
HCLKDIV_CTRL_Val EQU    0x0000003D

;// </e> Clock Configuration


;----------------------- EMC Definitions ---------------------------------------

; External Memory Controller (EMC) User Interface
EMC_BASE            EQU     0x31080000  ; EMC Controller          Base Address
EMCControl_OFS      EQU     0x00        ; Memory Controller Contr Address Offset
EMCStatus_OFS       EQU     0x04        ; EMC Status              Address Offset
EMCConfig_OFS       EQU     0x08        ; Mem Controller Oper Cfg Address Offset
EMCDynControl_OFS   EQU     0x20        ; Dynamic Mem Control Reg Address Offset
EMCDynRefresh_OFS   EQU     0x24        ; Dynamic Mem Refresh Reg Address Offset
EMCDynReadCfg_OFS   EQU     0x28        ; Dynamic Mem Read Config Address Offset
EMCDynRP_OFS        EQU     0x30        ; Precharge Cmd Period    Address Offset
EMCDynRAS_OFS       EQU     0x34        ; Active to Prchg Period  Address Offset
EMCDynSREX_OFS      EQU     0x38        ; Self-refresh Exit Time  Address Offset
EMCDynWR_OFS        EQU     0x44        ; Write Recovery Time     Address Offset
EMCDynRC_OFS        EQU     0x48        ; Act to Act Cmd Period   Address Offset
EMCDynRFC_OFS       EQU     0x4C        ; Auto-refresh Period     Address Offset
EMCDynXSR_OFS       EQU     0x50        ; Exit Selfref to Act Cmd Address Offset
EMCDynRRD_OFS       EQU     0x54        ; Active bank A to B      Address Offset
EMCDynMRD_OFS       EQU     0x58        ; Load Mode to Act Cmd    Address Offset
EMCDynCDLR_OFS      EQU     0x5C        ; Last data into Read Cmd Address Offset
EMCStaExtWait_OFS   EQU     0x80        ; Static Mem Extend Wait  Address Offset
EMCDynConfig0_OFS   EQU     0x100       ; SDRAM0 Config Info      Address Offset
EMCDynRasCas0_OFS   EQU     0x104       ; RAS0 and CAS0 Latencies Address Offset
EMCDynConfig1_OFS   EQU     0x120       ; SDRAM1 Config Info      Address Offset
EMCDynRasCas1_OFS   EQU     0x124       ; RAS1 and CAS1 Latencies Address Offset
EMCStaConfig0_OFS   EQU     0x200       ; CS0 Memory Config       Address Offset
EMCStaWaitWen0_OFS  EQU     0x204       ; CS0 to Wr Enable Delay  Address Offset
EMCStaWaitOen0_OFS  EQU     0x208       ; CS0 to Out Enable Delay Address Offset
EMCStaWaitRd0_OFS   EQU     0x20C       ; CS0 to Rd Access Delay  Address Offset
EMCStaWaitPage0_OFS EQU     0x210       ; CS0 Seq Access Delay    Address Offset
EMCStaWaitWr0_OFS   EQU     0x214       ; CS0 to Wr Access Delay  Address Offset
EMCStaWaitTurn0_OFS EQU     0x218       ; CS0 Turnaround Cycles   Address Offset
EMCStaConfig1_OFS   EQU     0x220       ; CS1 Memory Config       Address Offset
EMCStaWaitWen1_OFS  EQU     0x224       ; CS1 to Wr Enable Delay  Address Offset
EMCStaWaitOen1_OFS  EQU     0x228       ; CS1 to Out Enable Delay Address Offset
EMCStaWaitRd1_OFS   EQU     0x22C       ; CS1 to Rd Access Delay  Address Offset
EMCStaWaitPage1_OFS EQU     0x230       ; CS1 Seq Access Delay    Address Offset
EMCStaWaitWr1_OFS   EQU     0x234       ; CS1 to Wr Access Delay  Address Offset
EMCStaWaitTurn1_OFS EQU     0x238       ; CS1 Turnaround Cycles   Address Offset
EMCStaConfig2_OFS   EQU     0x240       ; CS2 Memory Config       Address Offset
EMCStaWaitWen2_OFS  EQU     0x244       ; CS2 to Wr Enable Delay  Address Offset
EMCStaWaitOen2_OFS  EQU     0x248       ; CS2 to Out Enable Delay Address Offset
EMCStaWaitRd2_OFS   EQU     0x24C       ; CS2 to Rd Access Delay  Address Offset
EMCStaWaitPage2_OFS EQU     0x250       ; CS2 Seq Access Delay    Address Offset
EMCStaWaitWr2_OFS   EQU     0x254       ; CS2 to Wr Access Delay  Address Offset
EMCStaWaitTurn2_OFS EQU     0x258       ; CS2 Turnaround Cycles   Address Offset
EMCStaConfig3_OFS   EQU     0x260       ; CS3 Memory Config       Address Offset
EMCStaWaitWen3_OFS  EQU     0x264       ; CS3 to Wr Enable Delay  Address Offset
EMCStaWaitOen3_OFS  EQU     0x268       ; CS3 to Out Enable Delay Address Offset
EMCStaWaitRd3_OFS   EQU     0x26C       ; CS3 to Rd Access Delay  Address Offset
EMCStaWaitPage3_OFS EQU     0x270       ; CS3 Seq Access Delay    Address Offset
EMCStaWaitWr3_OFS   EQU     0x274       ; CS3 to Wr Access Delay  Address Offset
EMCStaWaitTurn3_OFS EQU     0x278       ; CS3 Turnaround Cycles   Address Offset
EMCAHBControl0_OFS  EQU     0x400       ; AHB port 0 Control Reg  Address Offset
EMCAHBStatus0_OFS   EQU     0x404       ; AHB port 0 Status  Reg  Address Offset
EMCAHBTimeOut0_OFS  EQU     0x408       ; AHB port 0 Timeout Reg  Address Offset
EMCAHBControl2_OFS  EQU     0x440       ; AHB port 2 Control Reg  Address Offset
EMCAHBStatus2_OFS   EQU     0x444       ; AHB port 2 Status  Reg  Address Offset
EMCAHBTimeOut2_OFS  EQU     0x448       ; AHB port 2 Timeout Reg  Address Offset
EMCAHBControl3_OFS  EQU     0x460       ; AHB port 3 Control Reg  Address Offset
EMCAHBStatus3_OFS   EQU     0x464       ; AHB port 3 Status  Reg  Address Offset
EMCAHBTimeOut3_OFS  EQU     0x468       ; AHB port 3 Timeout Reg  Address Offset