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u-boot/board/bmw/early_init.S
wdenk afd7f3d0de Initial revision
2002-11-03 01:41:26 +00:00

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ArmAsm
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#include <ppc_asm.tmpl>
#include <mpc824x.h>
#include <ppc_defs.h>
#include <asm/cache.h>
#include <asm/mmu.h>
#define USE_V2_INIT 1 /* Jimmy Blair's initialization. */
/*
* Initialize the MMU using BAT entries and hardwired TLB
* This obviates the need for any code in cpu_init_f which
* configures the BAT registers.
*/
#define MEMORY_MGMT_MSR_BITS (MSR_DR | MSR_IR) /* Data and Inst Relocate */
.global iommu_setup
/* Initialize IO/MMU mappings via BAT method Ch. 7,
* PPC Programming Reference
*/
iommu_setup:
/* initialize the BAT registers (SPRs 528 - 543 */
#define mtibat0u(x) mtspr 528,(x) /* SPR 528 (IBAT0U) */
#define mtibat0l(x) mtspr 529,(x) /* SPR 529 (IBAT0L) */
#define mtibat1u(x) mtspr 530,(x) /* SPR 530 (IBAT1U) */
#define mtibat1l(x) mtspr 531,(x) /* SPR 531 (IBAT1L) */
#define mtibat2u(x) mtspr 532,(x) /* SPR 532 (IBAT2U) */
#define mtibat2l(x) mtspr 533,(x) /* SPR 533 (IBAT2L) */
#define mtibat3u(x) mtspr 534,(x) /* SPR 534 (IBAT3U) */
#define mtibat3l(x) mtspr 535,(x) /* SPR 535 (IBAT3L) */
#define mtdbat0u(x) mtspr 536,(x) /* SPR 536 (DBAT0U) */
#define mtdbat0l(x) mtspr 537,(x) /* SPR 537 (DBAT0L) */
#define mtdbat1u(x) mtspr 538,(x) /* SPR 538 (DBAT1U) */
#define mtdbat1l(x) mtspr 539,(x) /* SPR 539 (DBAT1L) */
#define mtdbat2u(x) mtspr 540,(x) /* SPR 540 (DBAT2U) */
#define mtdbat2l(x) mtspr 541,(x) /* SPR 541 (DBAT2L) */
#define mtdbat3u(x) mtspr 542,(x) /* SPR 542 (DBAT3U) */
#define mtdbat3l(x) mtspr 543,(x) /* SPR 543 (DBAT3L) */
/* PowerPC processors do not necessarily initialize the BAT
registers on power-up or reset. So they are in an unknown
state. Before programming the BATs for the first time, all
BAT registers MUST have their Vs and Vp bits cleared in the
upper BAT half in order to avoid possibly having 2 BATs
valid and mapping the same memory region.
The reason for this is that, even with address translation
disabled, multiple BAT hits for an address are treated as
programming errors and can cause unpredictable results.
It is up to the software to make sure it never has 2 IBAT
mappings or 2 DBAT mappings that are valid for the same
addresses. It is not necessary to perform this code
sequence every time the BATs are programmed, only when
there is a possibility that there may be overlapping BAT
entries.
When programming the BATs in non-reset scenarios, even if
you are sure that your new mapping will not temporarily
create overlapping regions, it is still a wise idea to
invalidate a BAT entry by setting its upper BAT register to
all 0's before programming it. This will avoid having a
BAT marked valid that is in an unknown or transient state
*/
addis r5,0,0x0000
mtibat0u(r5)
mtibat0l(r5)
mtibat1u(r5)
mtibat1l(r5)
mtibat2u(r5)
mtibat2l(r5)
mtibat3u(r5)
mtibat3l(r5)
mtdbat0u(r5)
mtdbat0l(r5)
mtdbat1u(r5)
mtdbat1l(r5)
mtdbat2u(r5)
mtdbat2l(r5)
mtdbat3u(r5)
mtdbat3l(r5)
isync
/*
* Set up I/D BAT0
*/
lis r4, CFG_DBAT0L@h
ori r4, r4, CFG_DBAT0L@l
lis r3, CFG_DBAT0U@h
ori r3, r3, CFG_DBAT0U@l
mtdbat0l(r4)
isync
mtdbat0u(r3)
isync
sync
lis r4, CFG_IBAT0L@h
ori r4, r4, CFG_IBAT0L@l
lis r3, CFG_IBAT0U@h
ori r3, r3, CFG_IBAT0U@l
isync
mtibat0l(r4)
isync
mtibat0u(r3)
isync
/*
* Set up I/D BAT1
*/
lis r4, CFG_IBAT1L@h
ori r4, r4, CFG_IBAT1L@l
lis r3, CFG_IBAT1U@h
ori r3, r3, CFG_IBAT1U@l
isync
mtibat1l(r4)
isync
mtibat1u(r3)
isync
mtdbat1l(r4)
isync
mtdbat1u(r3)
isync
sync
/*
* Set up I/D BAT2
*/
lis r4, CFG_IBAT2L@h
ori r4, r4, CFG_IBAT2L@l
lis r3, CFG_IBAT2U@h
ori r3, r3, CFG_IBAT2U@l
isync
mtibat2l(r4)
isync
mtibat2u(r3)
isync
mtdbat2l(r4)
isync
mtdbat2u(r3)
isync
sync
/*
* Setup I/D BAT3
*/
lis r4, CFG_IBAT3L@h
ori r4, r4, CFG_IBAT3L@l
lis r3, CFG_IBAT3U@h
ori r3, r3, CFG_IBAT3U@l
isync
mtibat3l(r4)
isync
mtibat3u(r3)
isync
mtdbat3l(r4)
isync
mtdbat3u(r3)
isync
sync
/*
* Invalidate all 64 TLB's
*/
lis r3, 0
mtctr r3
lis r5, 4
tlblp:
tlbie r3
sync
addi r3, r3, 0x1000
cmplw r3, r5
blt tlblp
sync
/*
* Enable Data Translation
*/
lis r4, MEMORY_MGMT_MSR_BITS@h
ori r4, r4, MEMORY_MGMT_MSR_BITS@l
mfmsr r3
or r3, r4, r3
mtmsr r3
isync
sync
blr
#ifdef USE_V2_INIT
/* #define USER_I_CACHE_ENABLE 1*/ /* Fast rom boots */
/* Macro for hiadjust and lo */
#define HIADJ(arg) arg@ha
#define HI(arg) arg@h
#define LO(arg) arg@l
#undef LOADPTR
#define LOADPTR(reg,const32) \
addis reg,r0,HIADJ(const32); addi reg,reg,LO(const32)
.globl early_init_f
early_init_f:
/* MPC8245/BMW CPCI System Init
* Jimmy Blair, Broadcom Corp, 2002.
*/
mflr r11
/* Zero-out registers */
addis r0,r0,0
mtspr SPRG0,r0
mtspr SPRG1,r0
mtspr SPRG2,r0
mtspr SPRG3,r0
/* Set MPU/MSR to a known state. Turn on FP */
LOADPTR (r3, MSR_FP)
sync
mtmsr r3
isync
/* Init the floating point control/status register */
mtfsfi 7,0x0
mtfsfi 6,0x0
mtfsfi 5,0x0
mtfsfi 4,0x0
mtfsfi 3,0x0
mtfsfi 2,0x0
mtfsfi 1,0x0
mtfsfi 0,0x0
isync
/* Set MPU/MSR to a known state. Turn off FP */
#if 1 /* Turn off floating point (remove to keep FP on) */
andi. r3, r3, 0
sync
mtmsr r3
isync
#endif
/* Init the Segment registers */
andi. r3, r3, 0
isync
mtsr 0,r3
isync
mtsr 1,r3
isync
mtsr 2,r3
isync
mtsr 3,r3
isync
mtsr 4,r3
isync
mtsr 5,r3
isync
mtsr 6,r3
isync
mtsr 7,r3
isync
mtsr 8,r3
isync
mtsr 9,r3
isync
mtsr 10,r3
isync
mtsr 11,r3
isync
mtsr 12,r3
isync
mtsr 13,r3
isync
mtsr 14,r3
isync
mtsr 15,r3
isync
/* Turn off data and instruction cache control bits */
mfspr r3, HID0
isync
rlwinm r4, r3, 0, 18, 15 /* r4 has ICE and DCE bits cleared */
sync
isync
mtspr HID0, r4 /* HID0 = r4 */
isync
/* Get cpu type */
mfspr r28, PVR
rlwinm r28, r28, 16, 16, 31
/* invalidate the MPU's data/instruction caches */
lis r3, 0x0
cmpli 0, 0, r28, CPU_TYPE_603
beq cpuIs603
cmpli 0, 0, r28, CPU_TYPE_603E
beq cpuIs603
cmpli 0, 0, r28, CPU_TYPE_603P
beq cpuIs603
cmpli 0, 0, r28, CPU_TYPE_604R
bne cpuNot604R
cpuIs604R:
lis r3, 0x0
mtspr HID0, r3 /* disable the caches */
isync
ori r4, r4, 0x0002 /* disable BTAC by setting bit 30 */
cpuNot604R:
ori r3, r3, (HID0_ICFI |HID0_DCI)
cpuIs603:
ori r3, r3, (HID0_ICE | HID0_DCE)
or r4, r4, r3 /* set bits */
sync
isync
mtspr HID0, r4 /* HID0 = r4 */
andc r4, r4, r3 /* clear bits */
isync
cmpli 0, 0, r28, CPU_TYPE_604
beq cpuIs604
cmpli 0, 0, r28, CPU_TYPE_604E
beq cpuIs604
cmpli 0, 0, r28, CPU_TYPE_604R
beq cpuIs604
mtspr HID0, r4
isync
#ifdef USER_I_CACHE_ENABLE
b instCacheOn603
#else
b cacheEnableDone
#endif
cpuIs604:
LOADPTR (r5, 0x1000) /* loop count, 0x1000 */
mtspr CTR, r5
loopDelay:
nop
bdnz loopDelay
isync
mtspr HID0, r4
isync
/* turn the Instruction cache ON for faster FLASH ROM boots */
#ifdef USER_I_CACHE_ENABLE
ori r4, r4, (HID0_ICE | HID0_ICFI)
isync /* Synchronize for ICE enable */
b writeReg4
instCacheOn603:
ori r4, r4, (HID0_ICE | HID0_ICFI)
rlwinm r3, r4, 0, 21, 19 /* clear the ICFI bit */
/*
* The setting of the instruction cache enable (ICE) bit must be
* preceded by an isync instruction to prevent the cache from being
* enabled or disabled while an instruction access is in progress.
*/
isync
writeReg4:
mtspr HID0, r4 /* Enable Instr Cache & Inval cache */
cmpli 0, 0, r28, CPU_TYPE_604
beq cacheEnableDone
cmpli 0, 0, r28, CPU_TYPE_604E
beq cacheEnableDone
mtspr HID0, r3 /* using 2 consec instructions */
/* PPC603 recommendation */
#endif
cacheEnableDone:
/* Detect map A or B */
addis r5,r0, HI(CHRP_REG_ADDR)
addis r6,r0, HI(CHRP_REG_DATA)
LOADPTR (r7, KAHLUA_ID) /* Kahlua PCI controller ID */
LOADPTR (r8, BMC_BASE)
stwbrx r8,0,(r5)
lwbrx r3,0,(r6) /* Store read value to r3 */
cmp 0,0,r3,r7
beq cr0, X4_KAHLUA_START
/* It's not an 8240, is it an 8245? */
LOADPTR (r7, KAHLUA2_ID) /* Kahlua PCI controller ID */
cmp 0,0,r3,r7
beq cr0, X4_KAHLUA_START
/* Save the PCI controller type in r7 */
mr r7, r3
LOADPTR (r5, PREP_REG_ADDR)
LOADPTR (r6, PREP_REG_DATA)
X4_KAHLUA_START:
/* MPC8245 changes begin here */
LOADPTR (r3, MPC107_PCI_CMD) /* PCI command reg */
stwbrx r3,0,r5
li r4, 6 /* Command register value */
sthbrx r4, 0, r6
LOADPTR (r3, MPC107_PCI_STAT) /* PCI status reg */
stwbrx r3,0,r5
li r4, -1 /* Write-to-clear all bits */
li r3, 2 /* PCI_STATUS is at +2 offset */
sthbrx r4, r3, r6
/*-------PROC_INT1_ADR */
LOADPTR (r3, PROC_INT1_ADR) /* Processor I/F Config 1 reg. */
stwbrx r3,0,r5
LOADPTR (r4, 0xff141b98)
stwbrx r4,0,r6
/*-------PROC_INT2_ADR */
LOADPTR (r3, PROC_INT2_ADR) /* Processor I/F Config 2 reg. */
stwbrx r3,0,r5
lis r4, 0x2000 /* Flush PCI config writes */
stwbrx r4,0,r6
LOADPTR (r9, KAHLUA2_ID)
cmpl 0, 0, r7, r9
bne L1not8245
/* MIOCR1 -- turn on bit for DLL delay */
LOADPTR (r3, MIOCR1_ADR_X)
stwbrx r3,0,r5
li r4, 0x04
stb r4, MIOCR1_SHIFT(r6)
/* For the MPC8245, set register 77 to %00100000 (see Errata #15) */
/* SDRAM_CLK_DEL (0x77)*/
LOADPTR (r3, MIOCR2_ADR_X)
stwbrx r3,0,r5
li r4, 0x10
stb r4, MIOCR2_SHIFT(r6)
/* PMCR2 -- set PCI hold delay to <10>b for 33 MHz */
LOADPTR (r3, PMCR2_ADR_X)
stwbrx r3,0,r5
li r4, 0x20
stb r4, PMCR2_SHIFT(r6)
/* Initialize EUMBBAR early since 8245 has internal UART in EUMB */
LOADPTR (r3, EUMBBAR)
stwbrx r3,0,r5
LOADPTR (r4, CFG_EUMB_ADDR)
stwbrx r4,0,r6
L1not8245:
/* Toggle the DLL reset bit in AMBOR */
LOADPTR (r3, AMBOR)
stwbrx r3,0,r5
lbz r4, 0(r6)
andi. r4, r4, 0xdf
stb r4, 0(r6) /* Clear DLL_RESET */
sync
ori r4, r4, 0x20 /* Set DLL_RESET */
stb r4, 0(r6)
sync
andi. r4, r4, 0xdf
stb r4, 0(r6) /* Clear DLL_RESET */
/* Enable RCS2, use supplied timings */
LOADPTR (r3, ERCR1)
stwbrx r3,0,r5
LOADPTR (r4, 0x80408000)
stwbrx r4,0,r6
/* Disable RCS3 parameters */
LOADPTR (r3, ERCR2)
stwbrx r3,0,r5
LOADPTR (r4, 0x00000000)
stwbrx r4,0,r6
/* RCS3 at 0x70000000, 64KBytes */
LOADPTR (r3, ERCR2)
stwbrx r3,0,r5
LOADPTR (r4, 0x00000004)
stwbrx r4,0,r6
/*-------MCCR1 */
#ifdef INCLUDE_ECC
#define MC_ECC 1
#else /* INCLUDE_ECC */
#define MC_ECC 0
#endif /* INCLUDE_ECC */
#define MC1_ROMNAL 8 /* 0-15 */
#define MC1_ROMFAL 11 /* 0-31 */
#define MC1_DBUS_SIZE 0 /* 0-3, read only */
#define MC1_BURST 0 /* 0-1 */
#define MC1_MEMGO 0 /* 0-1 */
#define MC1_SREN 1 /* 0-1 */
#define MC1_RAM_TYPE 0 /* 0-1 */
#define MC1_PCKEN MC_ECC /* 0-1 */
#define MC1_BANKBITS 0x5555 /* 2 bits/bank 7-0 */
LOADPTR (r3, MEM_CONT1_ADR) /* Set MCCR1 (F0) */
stwbrx r3,0,r5
LOADPTR(r4, \
MC1_ROMNAL << 28 | MC1_ROMFAL << 23 | \
MC1_DBUS_SIZE << 21 | MC1_BURST << 20 | \
MC1_MEMGO << 19 | MC1_SREN << 18 | \
MC1_RAM_TYPE << 17 | MC1_PCKEN << 16 )
li r3, MC1_BANKBITS
cmpl 0, 0, r7, r9 /* Check for Kahlua2 */
bne BankBitsAdd
cmpli 0, 0, r3, 0x5555
beq K2BankBitsHack /* On 8245, 5555 ==> 0 */
BankBitsAdd:
ori r4, r3, 0
K2BankBitsHack:
stwbrx r4, 0, r6
/*------- MCCR2 */
#define MC2_TS_WAIT_TIMER 0 /* 0-7 */
#define MC2_ASRISE 8 /* 0-15 */
#define MC2_ASFALL 4 /* 0-15 */
#define MC2_INLINE_PAR_NOT_ECC 0 /* 0-1 */
#define MC2_WRITE_PARITY_CHK_EN MC_ECC /* 0-1 */
#define MC2_INLRD_PARECC_CHK_EN MC_ECC /* 0-1 */
#define MC2_ECC_EN 0 /* 0-1 */
#define MC2_EDO 0 /* 0-1 */
/*
* N.B. This refresh interval looks good up to 85 MHz with Hynix SDRAM.
* May need to be decreased for 100 MHz
*/
#define MC2_REFINT 0x3a5 /* 0-0x3fff */
#define MC2_RSV_PG 0 /* 0-1 */
#define MC2_RMW_PAR MC_ECC /* 0-1 */
LOADPTR (r3, MEM_CONT2_ADR) /* Set MCCR2 (F4) */
stwbrx r3,0,r5
LOADPTR(r4, \
MC2_TS_WAIT_TIMER << 29 | MC2_ASRISE << 25 | \
MC2_ASFALL << 21 | MC2_INLINE_PAR_NOT_ECC << 20 | \
MC2_WRITE_PARITY_CHK_EN << 19 | \
MC2_INLRD_PARECC_CHK_EN << 18 | \
MC2_ECC_EN << 17 | MC2_EDO << 16 | \
MC2_REFINT << 2 | MC2_RSV_PG << 1 | MC2_RMW_PAR)
cmpl 0, 0, r7, r9 /* Check for Kahlua2 */
bne notK2
/* clear Kahlua2 reserved bits */
LOADPTR (r3, 0xfffcffff)
and r4, r4, r3
notK2:
stwbrx r4,0,r6
/*------- MCCR3 */
#define MC_BSTOPRE 0x079 /* 0-0x7ff */
#define MC3_BSTOPRE_U (MC_BSTOPRE >> 4 & 0xf)
#define MC3_REFREC 8 /* 0-15 */
#define MC3_RDLAT (4+MC_ECC) /* 0-15 */
#define MC3_CPX 0 /* 0-1 */
#define MC3_RAS6P 0 /* 0-15 */
#define MC3_CAS5 0 /* 0-7 */
#define MC3_CP4 0 /* 0-7 */
#define MC3_CAS3 0 /* 0-7 */
#define MC3_RCD2 0 /* 0-7 */
#define MC3_RP1 0 /* 0-7 */
LOADPTR (r3, MEM_CONT3_ADR) /* Set MCCR3 (F8) */
stwbrx r3,0,r5
LOADPTR(r4, \
MC3_BSTOPRE_U << 28 | MC3_REFREC << 24 | \
MC3_RDLAT << 20 | MC3_CPX << 19 | \
MC3_RAS6P << 15 | MC3_CAS5 << 12 | MC3_CP4 << 9 | \
MC3_CAS3 << 6 | MC3_RCD2 << 3 | MC3_RP1)
cmpl 0, 0, r7, r9 /* Check for Kahlua2 */
bne notK2b
/* clear Kahlua2 reserved bits */
LOADPTR (r3, 0xff000000)
and r4, r4, r3
notK2b:
stwbrx r4,0,r6
/*------- MCCR4 */
#define MC4_PRETOACT 3 /* 0-15 */
#define MC4_ACTOPRE 5 /* 0-15 */
#define MC4_WMODE 0 /* 0-1 */
#define MC4_INLINE MC_ECC /* 0-1 */
#define MC4_REGISTERED (1-MC_ECC) /* 0-1 */
#define MC4_BSTOPRE_UU (MC_BSTOPRE >> 8 & 3)
#define MC4_REGDIMM 0 /* 0-1 */
#define MC4_SDMODE_CAS 2 /* 0-7 */
#define MC4_DBUS_RCS1 1 /* 0-1, 8-bit */
#define MC4_SDMODE_WRAP 0 /* 0-1 */
#define MC4_SDMODE_BURST 2 /* 0-7 */
#define MC4_ACTORW 3 /* 0-15 */
#define MC4_BSTOPRE_L (MC_BSTOPRE & 0xf)
LOADPTR (r3, MEM_CONT4_ADR) /* Set MCCR4 (FC) */
stwbrx r3,0,r5
LOADPTR(r4, \
MC4_PRETOACT << 28 | MC4_ACTOPRE << 24 | \
MC4_WMODE << 23 | MC4_INLINE << 22 | \
MC4_REGISTERED << 20 | MC4_BSTOPRE_UU << 18 | \
MC4_DBUS_RCS1 << 17 | \
MC4_REGDIMM << 15 | MC4_SDMODE_CAS << 12 | \
MC4_SDMODE_WRAP << 11 | MC4_SDMODE_BURST << 8 | \
MC4_ACTORW << 4 | MC4_BSTOPRE_L)
cmpl 0, 0, r7, r9 /* Check for Kahlua 2 */
bne notK2c
/* Turn on Kahlua2 extended ROM space */
LOADPTR (r3, 0x00200000)
or r4, r4, r3
notK2c:
stwbrx r4,0,r6
#ifdef INCLUDE_ECC
/*------- MEM_ERREN1 */
LOADPTR (r3, MEM_ERREN1_ADR) /* Set MEM_ERREN1 (c0) */
stwbrx r3,0,r5
lwbrx r4,0,r6
ori r4,r4,4 /* Set MEM_PERR_EN */
stwbrx r4,0,r6
#endif /* INCLUDE_ECC */
/*------- MSAR/MEAR */
LOADPTR (r3, MEM_START1_ADR) /* Set MSAR1 (80) */
stwbrx r3,0,r5
LOADPTR (r4, 0xc0804000)
stwbrx r4,0,r6
LOADPTR (r3, MEM_START2_ADR) /* Set MSAR2 (84) */
stwbrx r3,0,r5
LOADPTR (r4, 0xc0804000)
stwbrx r4,0,r6
LOADPTR (r3, XMEM_START1_ADR) /* Set MESAR1 (88) */
stwbrx r3,0,r5
LOADPTR (r4, 0x00000000)
stwbrx r4,0,r6
LOADPTR (r3, XMEM_START2_ADR) /* Set MESAR2 (8c) */
stwbrx r3,0,r5
LOADPTR (r4, 0x01010101)
stwbrx r4,0,r6
LOADPTR (r3, MEM_END1_ADR) /* Set MEAR1 (90) */
stwbrx r3,0,r5
LOADPTR (r4, 0xffbf7f3f)
stwbrx r4,0,r6
LOADPTR (r3, MEM_END2_ADR) /* Set MEAR2 (94) */
stwbrx r3,0,r5
LOADPTR (r4, 0xffbf7f3f)
stwbrx r4,0,r6
LOADPTR (r3, XMEM_END1_ADR) /* MEEAR1 (98) */
stwbrx r3,0,r5
LOADPTR (r4, 0x00000000)
stwbrx r4,0,r6
LOADPTR (r3, XMEM_END2_ADR) /* MEEAR2 (9c) */
stwbrx r3,0,r5
LOADPTR (r4, 0x01010101)
stwbrx r4,0,r6
/*-------ODCR */
LOADPTR (r3, ODCR_ADR_X) /* Set ODCR */
stwbrx r3,0,r5
li r4, 0x7f
stb r4, ODCR_SHIFT(r6) /* ODCR is at +3 offset */
/*-------MBEN */
LOADPTR (r3, MEM_EN_ADR) /* Set MBEN (a0) */
stwbrx r3,0,r5
li r4, 0x01 /* Enable bank 0 */
stb r4, 0(r6) /* MBEN is at +0 offset */
#if 0 /* Jimmy: I think page made is broken */
/*-------PGMAX */
LOADPTR (r3, MPM_ADR_X)
stwbrx r3,0,r5
li r4, 0x32
stb r4, MPM_SHIFT(r6) /* PAGE_MODE is at +3 offset */
#endif
/* Wait before initializing other registers */
lis r4,0x0001
mtctr r4
KahluaX4wait200us:
bdnz KahluaX4wait200us
/* Set MEMGO bit */
LOADPTR (r3, MEM_CONT1_ADR) /* MCCR1 (F0) |= PGMAX */
stwbrx r3,0,r5
lwbrx r4,0,r6 /* old MCCR1 */
oris r4,r4,0x0008 /* MEMGO=1 */
stwbrx r4, 0, r6
/* Wait again */
addis r4,r0,0x0002
ori r4,r4,0xffff
mtctr r4
KahluaX4wait8ref:
bdnz KahluaX4wait8ref
sync
eieio
mtlr r11
blr
#else /* USE_V2_INIT */
/* U-Boot works, but memory will not run reliably for all address ranges.
* Early U-Boot Working init, but 2.4.19 kernel will crash since memory is not
* initialized correctly. Could work if debugged.
*/
/* PCI Support routines */
.globl __pci_config_read_32
__pci_config_read_32:
lis r4, 0xfec0
stwbrx r3, r0, r4
sync
lis r4, 0xfee0
lwbrx r3, 0, r4
blr
.globl __pci_config_read_16
__pci_config_read_16:
lis r4, 0xfec0
andi. r5, r3, 2
stwbrx r3, r0, r4
sync
oris r4, r5, 0xfee0
lhbrx r3, r0, r4
blr
.globl __pci_config_read_8
__pci_config_read_8:
lis r4, 0xfec0
andi. r5, r3, 3
stwbrx r3, r0, r4
sync
oris r4, r5, 0xfee0
lbz r3, 0(4)
blr
.globl __pci_config_write_32
__pci_config_write_32:
lis r5, 0xfec0
stwbrx r3, r0, r5
sync
lis r5, 0xfee0
stwbrx r4, r0, r5
sync
blr
.globl __pci_config_write_16
__pci_config_write_16:
lis r5, 0xfec0
andi. r6, r3, 2
stwbrx r3, r0, 5
sync
oris r5, r6, 0xfee0
sthbrx r4, r0, r5
sync
blr
.globl __pci_config_write_8
__pci_config_write_8:
lis r5, 0xfec0
andi. r6, r3, 3
stwbrx r3, r0, r5
sync
oris r5, r6, 0xfee0
stb r4, 0(r5)
sync
blr
.globl in_8
in_8:
oris r3, r3, 0xfe00
lbz r3,0(r3)
blr
.globl in_16
in_16:
oris r3, r3, 0xfe00
lhbrx r3, 0, r3
blr
.globl in_16_ne
in_16_ne:
oris r3, r3, 0xfe00
lhzx r3, 0, r3
blr
.globl in_32
in_32:
oris r3, r3, 0xfe00
lwbrx r3, 0, r3
blr
.globl out_8
out_8:
oris r3, r3, 0xfe00
stb r4, 0(r3)
eieio
blr
.globl out_16
out_16:
oris r3, r3, 0xfe00
sthbrx r4, 0, r3
eieio
blr
.globl out_16_ne
out_16_ne:
oris r3, r3, 0xfe00
sth r4, 0(r3)
eieio
blr
.globl out_32
out_32:
oris r3, r3, 0xfe00
stwbrx r4, 0, r3
eieio
blr
.globl read_8
read_8:
lbz r3,0(r3)
blr
.globl read_16
read_16:
lhbrx r3, 0, r3
blr
.globl read_32
read_32:
lwbrx r3, 0, r3
blr
.globl read_32_ne
read_32_ne:
lwz r3, 0(r3)
blr
.globl write_8
write_8:
stb r4, 0(r3)
eieio
blr
.globl write_16
write_16:
sthbrx r4, 0, r3
eieio
blr
.globl write_32
write_32:
stwbrx r4, 0, r3
eieio
blr
.globl write_32_ne
write_32_ne:
stw r4, 0(r3)
eieio
blr
.globl early_init_f
early_init_f:
mflr r11
lis r10, 0x8000
/* PCI Latency Timer */
li r4, 0x0d
ori r3, r10, PLTR@l
bl __pci_config_write_8
/* Cache Line Size */
li r4, 0x08
ori r3, r10, PCLSR@l
bl __pci_config_write_8
/* PCI Cmd */
li r4, 6
ori r3, r10, PCICR@l
bl __pci_config_write_16
#if 1
/* PCI Stat */
ori r3, r10, PCISR@l
bl __pci_config_read_16
ori r4, r4, 0xffff
ori r3, r10, PCISR@l
bl __pci_config_write_16
#endif
/* PICR1 */
lis r4, 0xff14
ori r4, r4, 0x1b98
ori r3, r10, PICR1@l
bl __pci_config_write_32
/* PICR2 */
lis r4, 0x0404
ori r4, r4, 0x0004
ori r3, r10, PICR2@l
bl __pci_config_write_32
/* MIOCR1 */
li r4, 0x04
ori r3, r10, MIOCR1@l
bl __pci_config_write_8
/* For the MPC8245, set register 77 to %00100000 (see Errata #15) */
/* SDRAM_CLK_DEL (0x77)*/
li r4, 0x10
ori r3, r10, MIOCR2@l
bl __pci_config_write_8
/* EUMBBAR */
lis r4, 0xfc00
ori r3, r10, EUMBBAR@l
bl __pci_config_write_32
/* AMBOR */
/* Even if Address Map B is not being used (though it should),
* the memory DLL needs to be cleared/set/cleared before using memory.
*/
ori r3, r10, AMBOR@l
bl __pci_config_read_8 /* get Current bits */
andi. r4, r4, 0xffdf
ori r3, r10, AMBOR@l
bl __pci_config_write_16 /* Clear DLL_RESET */
ori r4, r4, 0x0020
ori r3, r10, AMBOR@l
bl __pci_config_write_16 /* Set DLL_RESET */
andi. r4, r4, 0xffdf
ori r3, r10, AMBOR@l
bl __pci_config_write_16 /* Clear DLL_RESET */
/* ERCR1 */
lis r4, 0x8040 /* Enable RCS2, use supplied timings */
ori r4, r4, 0x8000
ori r3, r10, ERCR1@l
bl __pci_config_write_32
/* ERCR2 */
lis r4, 0x0000 /* Disable RCS3 parms */
ori r4, r4, 0x0000
ori r3, r10, ERCR2@l
bl __pci_config_write_32
/* ERCR3 */
lis r4, 0x0000 /* RCS3 at 0x70000000, 64K bytes */
ori r4, r4, 0x0004
ori r3, r10, ERCR2@l
bl __pci_config_write_32
/* Preserve memgo bit */
/* MCCR1 */
/* lis r4, 0x75a8 / Safe Local ROM = 11+3 clocks */
lis r4, 0x75a0 /* Safe Local ROM = 11+3 clocks */
/* lis r4, 0x73a0 / Fast Local ROM = 7+3 clocks */
/* oris r4, r4, 0x0010 / Burst ROM/Flash enable */
/* oris r4, r4, 0x0004 / Self-refresh enable */
/* ori r4,r4,0xFFFF / 16Mbit 2bank SDRAM */
/* ori r4,r4,0xAAAA / 256Mbit 4bank SDRAM (8245 only) */
/* ori r4,r4,0x5555 / 64Mbit 2bank SDRAM */
ori r4,r4,0x0000 /* 64Mbit 4bank SDRAM */
ori r3, r10, MCCR1@l
bl __pci_config_write_32
/* MCCR2 */
lis r4,0x0000
/* oris r4,r4,0x4000 / TS_WAIT_TIMER = 3 clocks */
oris r4,r4,0x1000 /* ASRISE = 8 clocks */
oris r4,r4,0x0080 /* ASFALL = 8 clocks */
/* oris r4,r4,0x0010 / SDRAM Parity (else ECC) */
/* oris r4,r4,0x0008 / Write parity check */
/* oris r4,r4,0x0004 / SDRAM inline reads */
/* Select a refresh rate; it needs to match the bus speed; if too */
/* slow, data may be lost; if too fast, performance is lost. We */
/* use the fastest value so we run at all speeds. */
/* Refresh = (15600ns/busclk) - (213 (see UM)). */
/* ori r4,r4,0x1d2c / 133 MHz mem bus = 1867 */
/* ori r4,r4,0x150c / 100 MHz mem bus = 1347 */
/* ori r4,r4,0x10fc / 83 MHz mem bus = 1087 */
/* ori r4,r4,0x0cc4 / 66 MHz mem bus = 817 */
ori r4,r4,0x04cc /* 33 MHz mem bus (SAFE) = 307 */
/* ori r4,r4,0x0002 / Reserve a page */
/* ori r4,r4,0x0001 / RWM parity */
ori r3, r10, MCCR2@l
bl __pci_config_write_32
/* MCCR3 */
lis r4,0x0000 /* BSTOPRE_M = 7 (see A/N) */
oris r4,r4,0x0500 /* REFREC = 8 clocks */
ori r3, r10, MCCR3@l
bl __pci_config_write_32
/* MCCR4 */ /* Turn on registered buffer mode */
lis r4, 0x2000 /* PRETOACT = 3 clocks */
oris r4,r4,0x0400 /* ACTOPRE = 5 clocks */
/* oris r4,r4,0x0080 / Enable 8-beat burst (32-bit bus) */
/* oris r4,r4,0x0040 / Enable Inline ECC/Parity */
oris r4,r4,0x0020 /* EXTROM enabled */
oris r4,r4,0x0010 /* Registered buffers */
/* oris r4,r4,0x0000 / BSTOPRE_U = 0 (see A/N) */
oris r4,r4,0x0002 /* DBUS_SIZ[2] (8 bit on RCS1) */
/* ori r4,r4,0x8000 / Registered DIMMs */
ori r4,r4,0x2000 /*CAS Latency (CL=3) (see RDLAT) */
/* ori r4,r4,0x2000 / CAS Latency (CL=2) (see RDLAT) */
/* ori r4,r4,0x0300 / Sequential wrap/8-beat burst */
ori r4,r4,0x0200 /* Sequential wrap/4-beat burst */
ori r4,r4,0x0030 /* ACTORW = 3 clocks */
ori r4,r4,0x0009 /* BSTOPRE_L = 9 (see A/N) */
ori r3, r10, MCCR4@l
bl __pci_config_write_32
/* MSAR1 */
lis r4, 0xc0804000@h
ori r4, r4, 0xc0804000@l
ori r3, r10, MSAR1@l
bl __pci_config_write_32
/* MSAR2 */
lis r4, 0xc0804000@h
ori r4, r4, 0xc0804000@l
ori r3, r10, MSAR2@l
bl __pci_config_write_32
/* MESAR1 */
lis r4, 0x00000000@h
ori r4, r4, 0x00000000@l
ori r3, r10, EMSAR1@l
bl __pci_config_write_32
/* MESAR2 */
lis r4, 0x01010101@h
ori r4, r4, 0x01010101@l
ori r3, r10, EMSAR2@l
bl __pci_config_write_32
/* MEAR1 */
lis r4, 0xffbf7f3f@h
ori r4, r4, 0xffbf7f3f@l
ori r3, r10, MEAR1@l
bl __pci_config_write_32
/* MEAR2 */
lis r4, 0xffbf7f3f@h
ori r4, r4, 0xffbf7f3f@l
ori r3, r10, MEAR2@l
bl __pci_config_write_32
/* MEEAR1 */
lis r4, 0x00000000@h
ori r4, r4, 0x00000000@l
ori r3, r10, EMEAR1@l
bl __pci_config_write_32
/* MEEAR2 */
lis r4, 0x01010101@h
ori r4, r4, 0x01010101@l
ori r3, r10, EMEAR2@l
bl __pci_config_write_32
/* ODCR */
li r4, 0x7f
ori r3, r10, ODCR@l
bl __pci_config_write_8
/* MBER */
li r4, 0x01
ori r3, r10, MBER@l
bl __pci_config_write_8
/* Page CTR aka PGMAX */
li r4, 0x32
ori r3, r10, 0x70
bl __pci_config_write_8
#if 0
/* CLK Drive */
ori r4, r10, 0xfc01 /* Top bit will be ignored */
ori r3, r10, 0x74
bl __pci_config_write_16
#endif
/* delay */
lis r7, 1
mtctr r7
label1: bdnz label1
/* Set memgo bit */
/* MCCR1 */
ori r3, r10, MCCR1@l
bl __pci_config_read_32
lis r7, 0x0008
or r4, r3, r7
ori r3, r10, MCCR1@l
bl __pci_config_write_32
/* delay again */
lis r7, 1
mtctr r7
label2: bdnz label2
#if 0
/* DEBUG: Infinite loop, write then read */
loop:
lis r7, 0xffff
mtctr r7
li r3, 0x5004
lis r4, 0xa0a0
ori r4, r4, 0x5050
bl write_32_ne
li r3, 0x5004
bl read_32_ne
bdnz loop
#endif
mtlr r11
blr
#endif
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