?? 44binit.s
字號:
#************************************************************
# NAME: 44binit.s *
# Author: Embest *
# Desc: C start up codes *
# Configure memory, Initialize ISR, stacks *
# Initialize C-variables *
# Fill zeros into zero-initialized C-variables *
# History: C.Liu 2005.02.17 *
#
#************************************************************
.include "option.a"
.include "memcfg.a"
/*------------------------------------------------------------------------------------------*/
/* constant define */
/*------------------------------------------------------------------------------------------*/
# Interrupt Control
.equ INTPND, 0x01e00004
.equ INTMOD, 0x01e00008
.equ INTMSK, 0x01e0000c
.equ I_ISPR, 0x01e00020
.equ I_CMST, 0x01e0001c
# Watchdog timer
.equ WTCON, 0x01d30000
# Clock Controller
.equ PLLCON, 0x01d80000
.equ CLKCON, 0x01d80004
.equ LOCKTIME, 0x01d8000c
# Memory Controller
.equ REFRESH, 0x01c80024
# BDMA destination register
.equ BDIDES0, 0x1f80008
.equ BDIDES1, 0x1f80028
# Pre-defined constants
.equ USERMODE, 0x10
.equ FIQMODE, 0x11
.equ IRQMODE, 0x12
.equ SVCMODE, 0x13
.equ ABORTMODE, 0x17
.equ UNDEFMODE, 0x1b
.equ MODEMASK, 0x1f
.equ NOINT, 0xc0
.equ IRQ_MODE, 0x40 /* Enable Interrupt Mode (IRQ) */
.equ FIQ_MODE, 0x80 /* Enable Fast Interrupt Mode (FIQ) */
/*------------------------------------------------------------------------------------------*/
/* macro define */
/*------------------------------------------------------------------------------------------*/
.macro HANDLER HandleLabel
stmdb sp!, {r0-r11, ip, lr} /* push r0-r11, ip, lr */
ldr r0, =\HandleLabel
ldr r1, [r0]
mov lr, pc
bx r1 /* call interrupt routine */
ldmia sp!, {r0-r11, ip, lr} /* pop r0-r11, ip, lr */
subs pc, r14, #4 /* interrupt ret */
.endm
.equ DON, (1<<6)
.equ DOFF, (0<<6)
.macro LCD_DOFF OPT
ldr r1, =0x01d2001c
ldr r2, =0x9aaa
str r2, [r1]
ldr r2, =0x0
str r2, [r1, #8] @ GPUPD
ldr r2, [r1, #4]
bic r2,r2,#DON @ change the GPD6
orr r2,r2,#\OPT
str r2, [r1, #4] @ GPDATD
.endm
.equ LED1, (1<<8)
.equ LED2, (1<<9)
.macro LED_ON NUM
ldr r1, =0x01d20010 @ GPCONC
ldr r2, =0x0FF5FF55
str r2, [r1]
ldr r2, =0x30ff
str r2, [r1, #8] @ GPUPC
ldr r2, [r1, #4]
bic r2,r2,#\NUM
str r2, [r1, #4] @ GPDATC
.endm
/*------------------------------------------------------------------------------------------*/
/* extern symbol */
/*------------------------------------------------------------------------------------------*/
.extern Image_RO_Base /* start of rom code */
.extern Image_RO_Limit /* End of ROM code (=start of ROM data) */
.extern Image_RW_Base /* Base of RAM to initialise */
.extern Image_ZI_Base /* Base and limit of area */
.extern Image_ZI_Limit /* to zero initialise */
.extern Main /* The main entry of mon program */
/*------------------------------------------------------------------------------------------*/
/* code */
/*------------------------------------------------------------------------------------------*/
.text
ENTRY:
b ResetHandler /* for debug */
b HandlerUndef /* handlerUndef */
b HandlerSWI /* SWI interrupt handler*/
b HandlerPabort /* handlerPAbort */
b HandlerDabort /* handlerDAbort */
b . /* handlerReserved */
ldr pc, =HandlerIRQ
b HandlerFIQ
# ***IMPORTANT NOTE***
# If the H/W vectored interrutp mode is enabled, The above two instructions should
# be changed like below, to work-around with H/W bug of S3C44B0X interrupt controller.
# b HandlerIRQ -> subs pc,lr,# 4
# b HandlerIRQ -> subs pc,lr,# 4
VECTOR_BRANCH:
ldr pc, =HandlerEINT0 /*mGA H/W interrupt vector table */
ldr pc, =HandlerEINT1 /* */
ldr pc, =HandlerEINT2 /* */
ldr pc, =HandlerEINT3 /* */
ldr pc, =HandlerEINT4567 /* */
ldr pc, =HandlerTICK /*mGA */
b .
b .
ldr pc, =HandlerZDMA0 /*mGB */
ldr pc, =HandlerZDMA1 /* */
ldr pc, =HandlerBDMA0 /* */
ldr pc, =HandlerBDMA1 /* */
ldr pc, =HandlerWDT /* */
ldr pc, =HandlerUERR01 /*mGB */
b .
b .
ldr pc, =HandlerTIMER0 /*mGC */
ldr pc, =HandlerTIMER1 /* */
ldr pc, =HandlerTIMER2 /* */
ldr pc, =HandlerTIMER3 /* */
ldr pc, =HandlerTIMER4 /* */
ldr pc, =HandlerTIMER5 /*mGC */
b .
b .
ldr pc, =HandlerURXD0 /*mGD */
ldr pc, =HandlerURXD1 /* */
ldr pc, =HandlerIIC /* */
ldr pc, =HandlerSIO /* */
ldr pc, =HandlerUTXD0 /* */
ldr pc, =HandlerUTXD1 /*mGD */
b .
b .
ldr pc, =HandlerRTC /*mGKA */
b . /* */
b . /* */
b . /* */
b . /* */
b . /*mGKA */
b .
b .
ldr pc,=HandlerADC /*mGKB */
b . /* */
b . /* */
b . /* */
b . /* */
b . /*mGKB */
b .
b .
ldr pc, =EnterPWDN
# the current contents of the literal pool to be dumped into the current section
# (which is assumed to be the .text section) at the current location (aligned to a word boundary).
.align
HandlerFIQ: HANDLER HandleFIQ
HandlerIRQ: HANDLER HandleIRQ
HandlerUndef: HANDLER HandleUndef
HandlerSWI: HANDLER HandleSWI
HandlerDabort: HANDLER HandleDabort
HandlerPabort: HANDLER HandlePabort
HandlerADC: HANDLER HandleADC
HandlerRTC: HANDLER HandleRTC
HandlerUTXD1: HANDLER HandleUTXD1
HandlerUTXD0: HANDLER HandleUTXD0
HandlerSIO: HANDLER HandleSIO
HandlerIIC: HANDLER HandleIIC
HandlerURXD1: HANDLER HandleURXD1
HandlerURXD0: HANDLER HandleURXD0
HandlerTIMER5: HANDLER HandleTIMER5
HandlerTIMER4: HANDLER HandleTIMER4
HandlerTIMER3: HANDLER HandleTIMER3
HandlerTIMER2: HANDLER HandleTIMER2
HandlerTIMER1: HANDLER HandleTIMER1
HandlerTIMER0: HANDLER HandleTIMER0
HandlerUERR01: HANDLER HandleUERR01
HandlerWDT: HANDLER HandleWDT
HandlerBDMA1: HANDLER HandleBDMA1
HandlerBDMA0: HANDLER HandleBDMA0
HandlerZDMA1: HANDLER HandleZDMA1
HandlerZDMA0: HANDLER HandleZDMA0
HandlerTICK: HANDLER HandleTICK
HandlerEINT4567:HANDLER HandleEINT4567
HandlerEINT3: HANDLER HandleEINT3
HandlerEINT2: HANDLER HandleEINT2
HandlerEINT1: HANDLER HandleEINT1
HandlerEINT0: HANDLER HandleEINT0
# One of the following two routines can be used for non-vectored interrupt.
IsrIRQ: /* using I_ISPR register. */
sub sp, sp, #4 /* reserved for PC */
stmfd sp!, {r8-r9}
# if I_ISPC isn't used properly, I_ISPR can be 0 in this routine.
ldr r9, =I_ISPR
ldr r9, [r9]
cmp r9, #0x0 /* If the IDLE mode work-around is used, r9 may be 0 sometimes. */
beq l2
mov r8, #0x0
l0:
movs r9, r9, lsr #1
bcs l1
add r8, r8, #4
b l0
l1:
ldr r9, =HandleADC
add r9, r9, r8
ldr r9, [r9]
str r9, [sp,#8]
ldmfd sp!, {r8-r9,pc}
l2:
ldmfd sp!, {r8-r9}
add sp, sp, #4
# subs pc, lr, #4
mov pc, lr
# ****************************************************
# * START *
# ****************************************************
ResetHandler:
ldr r0, =WTCON /* watch dog disable*/
ldr r1, =0x0
str r1, [r0]
ldr r0, =INTMSK
ldr r1, =0x07ffffff /* all interrupt disable */
str r1, [r0]
# ****************************************************
# * Set boot status *
# ****************************************************
LED_ON (LED1+LED2)
LCD_DOFF DOFF
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -