?? startup.s
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;
; Copyright (c) Microsoft Corporation. All rights reserved.
;
;
; Use of this source code is subject to the terms of the Microsoft end-user
; license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
; If you did not accept the terms of the EULA, you are not authorized to use
; this source code. For a copy of the EULA, please see the LICENSE.RTF on your
; install media.
;
;------------------------------------------------------------------------------
;
; Module: startup.s
;
; Common kernel startup routine for Samsung S3C2440a CPU.
;
; Include Files
OPT 2
INCLUDE kxarm.h
INCLUDE armmacros.s
INCLUDE s3c2440a.inc
; Defines
;------------------------------------------------------------------------------
; BUGBUG - ?
;PLLVAL EQU (((0xa1 << 12) + (0x3 << 4) + 0x1))
PLLVAL EQU (((0x6e << 12) + (0x3 << 4) + 0x1)) ; 2440A
;------------------------------------------------------------------------------
; Cache Configuration
DCACHE_LINES_PER_SET_BITS EQU (6)
DCACHE_LINES_PER_SET EQU (64)
DCACHE_NUM_SETS EQU (8)
DCACHE_SET_INDEX_BIT EQU (32 - DCACHE_LINES_PER_SET_BITS)
DCACHE_LINE_SIZE EQU (32)
;------------------------------------------------------------------------------
; Memory Controller Configuration
;
; The below defines are used in the MEMCTRLTAB table
; defined below to iniatialize the memory controller's
; register bank.
;
; SDRAM refresh control register configuration
REFEN EQU (0x1) ; Refresh enable
TREFMD EQU (0x0) ; CBR(CAS before RAS)/Auto refresh
Trp EQU (0x0) ; 2clk
Trc EQU (0x3) ; 7clk
Tchr EQU (0x2) ; 3clk
REFCNT EQU (1113) ; period=15.6us, HCLK=60Mhz, (2048+1-15.6*60)
; Bank Control
;
; Bus width and wait status control
B1_BWSCON EQU (DW32)
B2_BWSCON EQU (DW16)
B3_BWSCON EQU (DW16 + WAIT + UBLB)
B4_BWSCON EQU (DW16)
B5_BWSCON EQU (DW16)
B6_BWSCON EQU (DW32)
B7_BWSCON EQU (DW32)
; Bank 0
B0_Tacs EQU (0x0) ; 0clk
B0_Tcos EQU (0x0) ; 0clk
B0_Tacc EQU (0x7) ; 14clk
B0_Tcoh EQU (0x0) ; 0clk
B0_Tah EQU (0x0) ; 0clk
B0_Tacp EQU (0x0)
B0_PMC EQU (0x0) ; normal
; Bank 1
B1_Tacs EQU (0x0) ; 0clk
B1_Tcos EQU (0x0) ; 0clk
B1_Tacc EQU (0x7) ; 14clk
B1_Tcoh EQU (0x0) ; 0clk
B1_Tah EQU (0x0) ; 0clk
B1_Tacp EQU (0x0)
B1_PMC EQU (0x0) ; normal
; Bank 2
B2_Tacs EQU (0x0) ; 0clk
B2_Tcos EQU (0x0) ; 0clk
B2_Tacc EQU (0x7) ; 14clk
B2_Tcoh EQU (0x0) ; 0clk
B2_Tah EQU (0x0) ; 0clk
B2_Tacp EQU (0x0)
B2_PMC EQU (0x0) ; normal
; Bank 3
B3_Tacs EQU (0x0) ; 0clk
B3_Tcos EQU (0x0) ; 0clk
B3_Tacc EQU (0x7) ; 14clk
B3_Tcoh EQU (0x0) ; 0clk
B3_Tah EQU (0x0) ; 0clk
B3_Tacp EQU (0x0)
B3_PMC EQU (0x0) ; normal
; Bank 4
B4_Tacs EQU (0x0) ; 0clk
B4_Tcos EQU (0x0) ; 0clk
B4_Tacc EQU (0x7) ; 14clk
B4_Tcoh EQU (0x0) ; 0clk
B4_Tah EQU (0x0) ; 0clk
B4_Tacp EQU (0x0)
B4_PMC EQU (0x0) ; normal
; Bank 5
B5_Tacs EQU (0x0) ; 0clk
B5_Tcos EQU (0x0) ; 0clk
B5_Tacc EQU (0x7) ; 14clk
B5_Tcoh EQU (0x0) ; 0clk
B5_Tah EQU (0x0) ; 0clk
B5_Tacp EQU (0x0)
B5_PMC EQU (0x0) ; normal
; Bank 6
B6_MT EQU (0x3) ; SDRAM
B6_Trcd EQU (0x1) ; 3clk
B6_SCAN EQU (0x1) ; 9bit
; Bank 7
;
; Note - there is no memory connected to Bank 7
B7_MT EQU (0x3) ; SDRAM
B7_Trcd EQU (0x1) ; 3clk
B7_SCAN EQU (0x1) ; 9bit
;------------------------------------------------------------------------------
; Sleep state constants
;
; Location of sleep data
; BUGBUG - this needs to be declared as a local var.
SLEEPDATA_BASE_PHYSICAL EQU 0x30058000
; Sleep State memory locations
SleepState_Data_Start EQU (0)
SleepState_WakeAddr EQU (SleepState_Data_Start + 0)
SleepState_MMUCTL EQU (SleepState_WakeAddr + WORD_SIZE)
SleepState_MMUTTB EQU (SleepState_MMUCTL + WORD_SIZE)
SleepState_MMUDOMAIN EQU (SleepState_MMUTTB + WORD_SIZE)
SleepState_SVC_SP EQU (SleepState_MMUDOMAIN + WORD_SIZE)
SleepState_SVC_SPSR EQU (SleepState_SVC_SP + WORD_SIZE)
SleepState_FIQ_SPSR EQU (SleepState_SVC_SPSR + WORD_SIZE)
SleepState_FIQ_R8 EQU (SleepState_FIQ_SPSR + WORD_SIZE)
SleepState_FIQ_R9 EQU (SleepState_FIQ_R8 + WORD_SIZE)
SleepState_FIQ_R10 EQU (SleepState_FIQ_R9 + WORD_SIZE)
SleepState_FIQ_R11 EQU (SleepState_FIQ_R10 + WORD_SIZE)
SleepState_FIQ_R12 EQU (SleepState_FIQ_R11 + WORD_SIZE)
SleepState_FIQ_SP EQU (SleepState_FIQ_R12 + WORD_SIZE)
SleepState_FIQ_LR EQU (SleepState_FIQ_SP + WORD_SIZE)
SleepState_ABT_SPSR EQU (SleepState_FIQ_LR + WORD_SIZE)
SleepState_ABT_SP EQU (SleepState_ABT_SPSR + WORD_SIZE)
SleepState_ABT_LR EQU (SleepState_ABT_SP + WORD_SIZE)
SleepState_IRQ_SPSR EQU (SleepState_ABT_LR + WORD_SIZE)
SleepState_IRQ_SP EQU (SleepState_IRQ_SPSR + WORD_SIZE)
SleepState_IRQ_LR EQU (SleepState_IRQ_SP + WORD_SIZE)
SleepState_UND_SPSR EQU (SleepState_IRQ_LR + WORD_SIZE)
SleepState_UND_SP EQU (SleepState_UND_SPSR + WORD_SIZE)
SleepState_UND_LR EQU (SleepState_UND_SP + WORD_SIZE)
SleepState_SYS_SP EQU (SleepState_UND_LR + WORD_SIZE)
SleepState_SYS_LR EQU (SleepState_SYS_SP + WORD_SIZE)
SleepState_Data_End EQU (SleepState_SYS_LR + WORD_SIZE)
SLEEPDATA_SIZE EQU (SleepState_Data_End - SleepState_Data_Start) / 4
; External Variables
; External Functions
IMPORT OALStartUp
IMPORT ARMClearUTLB
IMPORT ARMFlushICache
IMPORT ARMFlushDCache
; Global Variables
; Local Variables
; Local Functions
;-------------------------------------------------------------------------------
; Function: Startup
;
; Main entry point for CPU initialization.
;
STARTUPTEXT
LEAF_ENTRY StartUp
; Jump over power-off code.
b ResetHandler
; Power-off the CPU.
str r1, [r0] ; enable SDRAM self-refresh.
str r3, [r2] ; MISCCR setting.
str r5, [r4] ; POWER OFF!!!!!
b .
ResetHandler
bl ARMClearUTLB
bl ARMFlushICache
ldr r0, = (DCACHE_LINES_PER_SET - 1)
ldr r1, = (DCACHE_NUM_SETS - 1)
ldr r2, = DCACHE_SET_INDEX_BIT
ldr r3, = DCACHE_LINE_SIZE
bl ARMFlushDCache
nop
nop
nop
ldr r0, = GPFCON
ldr r1, = 0x55aa
str r1, [r0]
ldr r0, = WTCON ; disable watch dog
ldr r1, = 0x0
str r1, [r0]
ldr r0, = INTMSK
ldr r1, = 0xffffffff ; disable all interrupts
str r1, [r0]
ldr r0, = INTSUBMSK
ldr r1, = 0x7ff ; disable all sub interrupt
str r1, [r0]
ldr r0, = INTMOD
mov r1, #0x0 ; set all interrupt as IRQ
str r1, [r0]
ldr r0, = CLKDIVN
ldr r1, = 0x7 ; 0x0 = 1:1:1, 0x1 = 1:1:2
; 0x2 = 1:2:2, 0x3 = 1:2:4, 0x7 = 1:3:6 0x8 = 1:4:4
str r1, [r0]
ands r1, r1, #0x2 ; set AsyncBusMode
beq %F1
mrc p15, 0, r0, c1, c0, 0
orr r0, r0, #R1_nF:OR:R1_iA
mcr p15, 0, r0, c1, c0, 0
1
ldr r0, = LOCKTIME ; To reduce PLL lock time, adjust the LOCKTIME register.
ldr r1, = 0xffffff
str r1, [r0]
ldr r0, = MPLLCON ; Configure MPLL
; Fin=16MHz, Fout=50MHz -> Fo= 399.65Mhz
ldr r1, = PLLVAL
str r1, [r0]
ldr r0, = UPLLCON
; ldr r1, = ((0x3c << 12) + (0x3 << 4) + 0x2) ; 16Mhz
ldr r1, = ((0x38 << 12) + (0x2 << 4) + 0x2) ; 12Mhz
str r1, [r0]
mov r0, #0x2000
1
subs r0, r0, #1
bne %B1
;------------------------------------------------------------------------------
; Add for Power Management
ldr r1, =GSTATUS2 ; Determine Booting Mode
ldr r10, [r1]
tst r10, #0x2
beq %F2 ; if not wakeup from PowerOffmode
; Skip MISCCR setting
ldr r1, =MISCCR ; MISCCR's Bit 17, 18, 19 -> 0
ldr r0, [r1] ; I don't know why, Just fallow Sample Code.
bic r0, r0, #(7 << 17) ; SCLK0:0->SCLK, SCLK1:0->SCLK, SCKE:L->H
str r0, [r1]
;------------------------------------------------------------------------------
; Add for Power Management
2
add r0, pc, #MEMCTRLTAB - (. + 8)
ldr r1, = BWSCON ; BWSCON Address
add r2, r0, #52 ; End address of MEMCTRLTAB
1
ldr r3, [r0], #4
str r3, [r1], #4
cmp r2, r0
bne %B1
;------------------------------------------------------------------------------
; Add for Power Management
tst r10, #0x2
beq BringUpWinCE ; Normal Mode Booting
;------------------------------------------------------------------------------
; Recover Process : Starting Point
;
; 1. Checksum Calculation saved Data
ldr r5, =SLEEPDATA_BASE_PHYSICAL ; pointer to physical address of reserved Sleep mode info data structure
mov r3, r5 ; pointer for checksum calculation
mov r2, #0
ldr r0, =SLEEPDATA_SIZE ; get size of data structure to do checksum on
40
ldr r1, [r3], #4 ; pointer to SLEEPDATA
and r1, r1, #0x1
mov r1, r1, LSL #31
orr r1, r1, r1, LSR #1
add r2, r2, r1
subs r0, r0, #1 ; dec the count
bne %b40 ; loop till done
ldr r0,=GSTATUS3
ldr r3, [r0] ; get the Sleep data checksum from the Power Manager Scratch pad register
teq r2, r3 ; compare to what we saved before going to sleep
bne BringUpWinCE ; bad news - do a cold boot
; 2. MMU Enable
ldr r10, [r5, #SleepState_MMUDOMAIN] ; load the MMU domain access info
ldr r9, [r5, #SleepState_MMUTTB] ; load the MMU TTB info
ldr r8, [r5, #SleepState_MMUCTL] ; load the MMU control info
ldr r7, [r5, #SleepState_WakeAddr ] ; load the LR address
nop
nop
nop
nop
nop
; if software reset
mov r1, #0
teq r1, r7
bne %f1
bl BringUpWinCE
; wakeup routine
1
mcr p15, 0, r10, c3, c0, 0 ; setup access to domain 0
mcr p15, 0, r9, c2, c0, 0 ; PT address
mcr p15, 0, r0, c8, c7, 0 ; flush I+D TLBs
mcr p15, 0, r8, c1, c0, 0 ; restore MMU control
; 3. Jump to Kernel Image's fw.s (Awake_address)
mov pc, r7 ; jump to new VA (back up Power management stack)
nop
;------------------------------------------------------------------------------
; Add for Power Management ?
BringUpWinCE
ldr r0, = GPFDAT
mov r1, #0x60
str r1, [r0]
; Execute OALStartup
bl OALStartUp
ENTRY_END
LTORG
;------------------------------------------------------------------------------
; Memory Controller Configuration Data Table
;
; This data block is loaded into the memory controller's
; registers to configure the platform memory.
;
MEMCTRLTAB DATA
DCD (0+(B1_BWSCON<<4)+(B2_BWSCON<<8)+(B3_BWSCON<<12)+(B4_BWSCON<<16)+(B5_BWSCON<<20)+(B6_BWSCON<<24)+(B7_BWSCON<<28))
DCD ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC)) ; BANKCON0
DCD ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC)) ; BANKCON1
DCD ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC)) ; BANKCON2
DCD ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC)) ; BANKCON3
DCD ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC)) ; BANKCON4
DCD ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC)) ; BANKCON5
DCD ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN)) ; BANKCON6
DCD ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN)) ; BANKCON7
DCD ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT) ; REFRESH
DCD 0xB2 ; BANKSIZE
DCD 0x20 ; MRSRB6
DCD 0x20 ; MRSRB7
END
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