| /* |
| * Copyright (C) 1998 Dan Malek <dmalek@jlc.net> |
| * Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se> |
| * Copyright (C) 2000,2001,2002 Wolfgang Denk <wd@denx.de> |
| * Copyright (C) 2007 Stefan Roese <sr@denx.de>, DENX Software Engineering |
| * Copyright (c) 2008 Nuovation System Designs, LLC |
| * Grant Erickson <gerickson@nuovations.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0 IBM-pibs |
| */ |
| |
| /* |
| * Startup code for IBM/AMCC PowerPC 4xx (PPC4xx) based boards |
| * |
| * The following description only applies to the NOR flash style booting. |
| * NAND booting is different. For more details about NAND booting on 4xx |
| * take a look at doc/README.nand-boot-ppc440. |
| * |
| * The CPU starts at address 0xfffffffc (last word in the address space). |
| * The U-Boot image therefore has to be located in the "upper" area of the |
| * flash (e.g. 512MiB - 0xfff80000 ... 0xffffffff). The default value for |
| * the boot chip-select (CS0) is quite big and covers this area. On the |
| * 405EX this is for example 0xffe00000 ... 0xffffffff. U-Boot will |
| * reconfigure this CS0 (and other chip-selects as well when configured |
| * this way) in the boot process to the "correct" values matching the |
| * board layout. |
| */ |
| |
| #include <asm-offsets.h> |
| #include <config.h> |
| #include <asm/ppc4xx.h> |
| #include <version.h> |
| |
| #include <ppc_asm.tmpl> |
| #include <ppc_defs.h> |
| |
| #include <asm/cache.h> |
| #include <asm/mmu.h> |
| #include <asm/ppc4xx-isram.h> |
| |
| #ifdef CONFIG_SYS_INIT_DCACHE_CS |
| # if (CONFIG_SYS_INIT_DCACHE_CS == 0) |
| # define PBxAP PB1AP |
| # define PBxCR PB0CR |
| # if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR)) |
| # define PBxAP_VAL CONFIG_SYS_EBC_PB0AP |
| # define PBxCR_VAL CONFIG_SYS_EBC_PB0CR |
| # endif |
| # endif |
| # if (CONFIG_SYS_INIT_DCACHE_CS == 1) |
| # define PBxAP PB1AP |
| # define PBxCR PB1CR |
| # if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR)) |
| # define PBxAP_VAL CONFIG_SYS_EBC_PB1AP |
| # define PBxCR_VAL CONFIG_SYS_EBC_PB1CR |
| # endif |
| # endif |
| # if (CONFIG_SYS_INIT_DCACHE_CS == 2) |
| # define PBxAP PB2AP |
| # define PBxCR PB2CR |
| # if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR)) |
| # define PBxAP_VAL CONFIG_SYS_EBC_PB2AP |
| # define PBxCR_VAL CONFIG_SYS_EBC_PB2CR |
| # endif |
| # endif |
| # if (CONFIG_SYS_INIT_DCACHE_CS == 3) |
| # define PBxAP PB3AP |
| # define PBxCR PB3CR |
| # if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR)) |
| # define PBxAP_VAL CONFIG_SYS_EBC_PB3AP |
| # define PBxCR_VAL CONFIG_SYS_EBC_PB3CR |
| # endif |
| # endif |
| # if (CONFIG_SYS_INIT_DCACHE_CS == 4) |
| # define PBxAP PB4AP |
| # define PBxCR PB4CR |
| # if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR)) |
| # define PBxAP_VAL CONFIG_SYS_EBC_PB4AP |
| # define PBxCR_VAL CONFIG_SYS_EBC_PB4CR |
| # endif |
| # endif |
| # if (CONFIG_SYS_INIT_DCACHE_CS == 5) |
| # define PBxAP PB5AP |
| # define PBxCR PB5CR |
| # if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR)) |
| # define PBxAP_VAL CONFIG_SYS_EBC_PB5AP |
| # define PBxCR_VAL CONFIG_SYS_EBC_PB5CR |
| # endif |
| # endif |
| # if (CONFIG_SYS_INIT_DCACHE_CS == 6) |
| # define PBxAP PB6AP |
| # define PBxCR PB6CR |
| # if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR)) |
| # define PBxAP_VAL CONFIG_SYS_EBC_PB6AP |
| # define PBxCR_VAL CONFIG_SYS_EBC_PB6CR |
| # endif |
| # endif |
| # if (CONFIG_SYS_INIT_DCACHE_CS == 7) |
| # define PBxAP PB7AP |
| # define PBxCR PB7CR |
| # if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR)) |
| # define PBxAP_VAL CONFIG_SYS_EBC_PB7AP |
| # define PBxCR_VAL CONFIG_SYS_EBC_PB7CR |
| # endif |
| # endif |
| # ifndef PBxAP_VAL |
| # define PBxAP_VAL 0 |
| # endif |
| # ifndef PBxCR_VAL |
| # define PBxCR_VAL 0 |
| # endif |
| /* |
| * Memory Bank x (nothingness) initialization CONFIG_SYS_INIT_RAM_ADDR + 64 MiB |
| * used as temporary stack pointer for the primordial stack |
| */ |
| # ifndef CONFIG_SYS_INIT_DCACHE_PBxAR |
| # define CONFIG_SYS_INIT_DCACHE_PBxAR (EBC_BXAP_BME_DISABLED | \ |
| EBC_BXAP_TWT_ENCODE(7) | \ |
| EBC_BXAP_BCE_DISABLE | \ |
| EBC_BXAP_BCT_2TRANS | \ |
| EBC_BXAP_CSN_ENCODE(0) | \ |
| EBC_BXAP_OEN_ENCODE(0) | \ |
| EBC_BXAP_WBN_ENCODE(0) | \ |
| EBC_BXAP_WBF_ENCODE(0) | \ |
| EBC_BXAP_TH_ENCODE(2) | \ |
| EBC_BXAP_RE_DISABLED | \ |
| EBC_BXAP_SOR_NONDELAYED | \ |
| EBC_BXAP_BEM_WRITEONLY | \ |
| EBC_BXAP_PEN_DISABLED) |
| # endif /* CONFIG_SYS_INIT_DCACHE_PBxAR */ |
| # ifndef CONFIG_SYS_INIT_DCACHE_PBxCR |
| # define CONFIG_SYS_INIT_DCACHE_PBxCR (EBC_BXCR_BAS_ENCODE(CONFIG_SYS_INIT_RAM_ADDR) | \ |
| EBC_BXCR_BS_64MB | \ |
| EBC_BXCR_BU_RW | \ |
| EBC_BXCR_BW_16BIT) |
| # endif /* CONFIG_SYS_INIT_DCACHE_PBxCR */ |
| # ifndef CONFIG_SYS_INIT_RAM_PATTERN |
| # define CONFIG_SYS_INIT_RAM_PATTERN 0xDEADDEAD |
| # endif |
| #endif /* CONFIG_SYS_INIT_DCACHE_CS */ |
| |
| #if (defined(CONFIG_SYS_INIT_RAM_DCACHE) && (CONFIG_SYS_INIT_RAM_SIZE > (4 << 10))) |
| #error Only 4k of init-ram is supported - please adjust CONFIG_SYS_INIT_RAM_SIZE! |
| #endif |
| |
| /* |
| * Unless otherwise overriden, enable two 128MB cachable instruction regions |
| * at CONFIG_SYS_SDRAM_BASE and another 128MB cacheable instruction region covering |
| * NOR flash at CONFIG_SYS_FLASH_BASE. Disable all cacheable data regions. |
| */ |
| #if !defined(CONFIG_SYS_FLASH_BASE) |
| /* If not already defined, set it to the "last" 128MByte region */ |
| # define CONFIG_SYS_FLASH_BASE 0xf8000000 |
| #endif |
| #if !defined(CONFIG_SYS_ICACHE_SACR_VALUE) |
| # define CONFIG_SYS_ICACHE_SACR_VALUE \ |
| (PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + ( 0 << 20)) | \ |
| PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + (128 << 20)) | \ |
| PPC_128MB_SACR_VALUE(CONFIG_SYS_FLASH_BASE)) |
| #endif /* !defined(CONFIG_SYS_ICACHE_SACR_VALUE) */ |
| |
| #if !defined(CONFIG_SYS_DCACHE_SACR_VALUE) |
| # define CONFIG_SYS_DCACHE_SACR_VALUE \ |
| (0x00000000) |
| #endif /* !defined(CONFIG_SYS_DCACHE_SACR_VALUE) */ |
| |
| #if !defined(CONFIG_SYS_TLB_FOR_BOOT_FLASH) |
| #define CONFIG_SYS_TLB_FOR_BOOT_FLASH 0 /* use TLB 0 as default */ |
| #endif |
| |
| #define function_prolog(func_name) .text; \ |
| .align 2; \ |
| .globl func_name; \ |
| func_name: |
| #define function_epilog(func_name) .type func_name,@function; \ |
| .size func_name,.-func_name |
| |
| /* We don't want the MMU yet. |
| */ |
| #undef MSR_KERNEL |
| #define MSR_KERNEL ( MSR_ME ) /* Machine Check */ |
| |
| |
| .extern ext_bus_cntlr_init |
| |
| /* |
| * Set up GOT: Global Offset Table |
| * |
| * Use r12 to access the GOT |
| */ |
| #if !defined(CONFIG_SPL_BUILD) |
| START_GOT |
| GOT_ENTRY(_GOT2_TABLE_) |
| GOT_ENTRY(_FIXUP_TABLE_) |
| |
| GOT_ENTRY(_start) |
| GOT_ENTRY(_start_of_vectors) |
| GOT_ENTRY(_end_of_vectors) |
| GOT_ENTRY(transfer_to_handler) |
| |
| GOT_ENTRY(__init_end) |
| GOT_ENTRY(__bss_end) |
| GOT_ENTRY(__bss_start) |
| END_GOT |
| #endif /* CONFIG_SPL_BUILD */ |
| |
| #if defined(CONFIG_SYS_RAMBOOT) || defined(CONFIG_BOOT_FROM_XMD) |
| /* |
| * 4xx RAM-booting U-Boot image is started from offset 0 |
| */ |
| .text |
| bl _start_440 |
| #endif |
| |
| #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD) |
| /* |
| * This is the entry of the real U-Boot from a board port |
| * that supports SPL booting on the PPC4xx. We only need |
| * to call board_init_f() here. Everything else has already |
| * been done in the SPL u-boot version. |
| */ |
| GET_GOT /* initialize GOT access */ |
| bl board_init_f /* run 1st part of board init code (in Flash)*/ |
| /* NOTREACHED - board_init_f() does not return */ |
| #endif |
| |
| /* |
| * 440 Startup -- on reset only the top 4k of the effective |
| * address space is mapped in by an entry in the instruction |
| * and data shadow TLB. The .bootpg section is located in the |
| * top 4k & does only what's necessary to map in the the rest |
| * of the boot rom. Once the boot rom is mapped in we can |
| * proceed with normal startup. |
| * |
| * NOTE: CS0 only covers the top 2MB of the effective address |
| * space after reset. |
| */ |
| |
| #if defined(CONFIG_440) |
| .section .bootpg,"ax" |
| .globl _start_440 |
| |
| /**************************************************************************/ |
| _start_440: |
| /*--------------------------------------------------------------------+ |
| | 440EPX BUP Change - Hardware team request |
| +--------------------------------------------------------------------*/ |
| #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) |
| sync |
| nop |
| nop |
| #endif |
| /*----------------------------------------------------------------+ |
| | Core bug fix. Clear the esr |
| +-----------------------------------------------------------------*/ |
| li r0,0 |
| mtspr SPRN_ESR,r0 |
| /*----------------------------------------------------------------*/ |
| /* Clear and set up some registers. */ |
| /*----------------------------------------------------------------*/ |
| iccci r0,r0 /* NOTE: operands not used for 440 */ |
| dccci r0,r0 /* NOTE: operands not used for 440 */ |
| sync |
| li r0,0 |
| mtspr SPRN_SRR0,r0 |
| mtspr SPRN_SRR1,r0 |
| mtspr SPRN_CSRR0,r0 |
| mtspr SPRN_CSRR1,r0 |
| /* NOTE: 440GX adds machine check status regs */ |
| #if defined(CONFIG_440) && !defined(CONFIG_440GP) |
| mtspr SPRN_MCSRR0,r0 |
| mtspr SPRN_MCSRR1,r0 |
| mfspr r1,SPRN_MCSR |
| mtspr SPRN_MCSR,r1 |
| #endif |
| |
| /*----------------------------------------------------------------*/ |
| /* CCR0 init */ |
| /*----------------------------------------------------------------*/ |
| /* Disable store gathering & broadcast, guarantee inst/data |
| * cache block touch, force load/store alignment |
| * (see errata 1.12: 440_33) |
| */ |
| lis r1,0x0030 /* store gathering & broadcast disable */ |
| ori r1,r1,0x6000 /* cache touch */ |
| mtspr SPRN_CCR0,r1 |
| |
| /*----------------------------------------------------------------*/ |
| /* Initialize debug */ |
| /*----------------------------------------------------------------*/ |
| mfspr r1,SPRN_DBCR0 |
| andis. r1, r1, 0x8000 /* test DBCR0[EDM] bit */ |
| bne skip_debug_init /* if set, don't clear debug register */ |
| mfspr r1,SPRN_CCR0 |
| ori r1,r1,CCR0_DTB@l /* Disable Trace Broadcast */ |
| mtspr SPRN_CCR0,r1 |
| mtspr SPRN_DBCR0,r0 |
| mtspr SPRN_DBCR1,r0 |
| mtspr SPRN_DBCR2,r0 |
| mtspr SPRN_IAC1,r0 |
| mtspr SPRN_IAC2,r0 |
| mtspr SPRN_IAC3,r0 |
| mtspr SPRN_DAC1,r0 |
| mtspr SPRN_DAC2,r0 |
| mtspr SPRN_DVC1,r0 |
| mtspr SPRN_DVC2,r0 |
| |
| mfspr r1,SPRN_DBSR |
| mtspr SPRN_DBSR,r1 /* Clear all valid bits */ |
| skip_debug_init: |
| |
| #if defined (CONFIG_440SPE) |
| /*----------------------------------------------------------------+ |
| | Initialize Core Configuration Reg1. |
| | a. ICDPEI: Record even parity. Normal operation. |
| | b. ICTPEI: Record even parity. Normal operation. |
| | c. DCTPEI: Record even parity. Normal operation. |
| | d. DCDPEI: Record even parity. Normal operation. |
| | e. DCUPEI: Record even parity. Normal operation. |
| | f. DCMPEI: Record even parity. Normal operation. |
| | g. FCOM: Normal operation |
| | h. MMUPEI: Record even parity. Normal operation. |
| | i. FFF: Flush only as much data as necessary. |
| | j. TCS: Timebase increments from CPU clock. |
| +-----------------------------------------------------------------*/ |
| li r0,0 |
| mtspr SPRN_CCR1, r0 |
| |
| /*----------------------------------------------------------------+ |
| | Reset the timebase. |
| | The previous write to CCR1 sets the timebase source. |
| +-----------------------------------------------------------------*/ |
| mtspr SPRN_TBWL, r0 |
| mtspr SPRN_TBWU, r0 |
| #endif |
| |
| /*----------------------------------------------------------------*/ |
| /* Setup interrupt vectors */ |
| /*----------------------------------------------------------------*/ |
| mtspr SPRN_IVPR,r0 /* Vectors start at 0x0000_0000 */ |
| li r1,0x0100 |
| mtspr SPRN_IVOR0,r1 /* Critical input */ |
| li r1,0x0200 |
| mtspr SPRN_IVOR1,r1 /* Machine check */ |
| li r1,0x0300 |
| mtspr SPRN_IVOR2,r1 /* Data storage */ |
| li r1,0x0400 |
| mtspr SPRN_IVOR3,r1 /* Instruction storage */ |
| li r1,0x0500 |
| mtspr SPRN_IVOR4,r1 /* External interrupt */ |
| li r1,0x0600 |
| mtspr SPRN_IVOR5,r1 /* Alignment */ |
| li r1,0x0700 |
| mtspr SPRN_IVOR6,r1 /* Program check */ |
| li r1,0x0800 |
| mtspr SPRN_IVOR7,r1 /* Floating point unavailable */ |
| li r1,0x0c00 |
| mtspr SPRN_IVOR8,r1 /* System call */ |
| li r1,0x0a00 |
| mtspr SPRN_IVOR9,r1 /* Auxiliary Processor unavailable */ |
| li r1,0x0900 |
| mtspr SPRN_IVOR10,r1 /* Decrementer */ |
| li r1,0x1300 |
| mtspr SPRN_IVOR13,r1 /* Data TLB error */ |
| li r1,0x1400 |
| mtspr SPRN_IVOR14,r1 /* Instr TLB error */ |
| li r1,0x2000 |
| mtspr SPRN_IVOR15,r1 /* Debug */ |
| |
| /*----------------------------------------------------------------*/ |
| /* Configure cache regions */ |
| /*----------------------------------------------------------------*/ |
| mtspr SPRN_INV0,r0 |
| mtspr SPRN_INV1,r0 |
| mtspr SPRN_INV2,r0 |
| mtspr SPRN_INV3,r0 |
| mtspr SPRN_DNV0,r0 |
| mtspr SPRN_DNV1,r0 |
| mtspr SPRN_DNV2,r0 |
| mtspr SPRN_DNV3,r0 |
| mtspr SPRN_ITV0,r0 |
| mtspr SPRN_ITV1,r0 |
| mtspr SPRN_ITV2,r0 |
| mtspr SPRN_ITV3,r0 |
| mtspr SPRN_DTV0,r0 |
| mtspr SPRN_DTV1,r0 |
| mtspr SPRN_DTV2,r0 |
| mtspr SPRN_DTV3,r0 |
| |
| /*----------------------------------------------------------------*/ |
| /* Cache victim limits */ |
| /*----------------------------------------------------------------*/ |
| /* floors 0, ceiling max to use the entire cache -- nothing locked |
| */ |
| lis r1,0x0001 |
| ori r1,r1,0xf800 |
| mtspr SPRN_IVLIM,r1 |
| mtspr SPRN_DVLIM,r1 |
| |
| /*----------------------------------------------------------------+ |
| |Initialize MMUCR[STID] = 0. |
| +-----------------------------------------------------------------*/ |
| mfspr r0,SPRN_MMUCR |
| addis r1,0,0xFFFF |
| ori r1,r1,0xFF00 |
| and r0,r0,r1 |
| mtspr SPRN_MMUCR,r0 |
| |
| /*----------------------------------------------------------------*/ |
| /* Clear all TLB entries -- TID = 0, TS = 0 */ |
| /*----------------------------------------------------------------*/ |
| addis r0,0,0x0000 |
| #ifdef CONFIG_SYS_RAMBOOT |
| li r4,0 /* Start with TLB #0 */ |
| #else |
| li r4,1 /* Start with TLB #1 */ |
| #endif |
| li r1,64 /* 64 TLB entries */ |
| sub r1,r1,r4 /* calculate last TLB # */ |
| mtctr r1 |
| rsttlb: |
| #ifdef CONFIG_SYS_RAMBOOT |
| tlbre r3,r4,0 /* Read contents from TLB word #0 to get EPN */ |
| rlwinm. r3,r3,0,0xfffffc00 /* Mask EPN */ |
| beq tlbnxt /* Skip EPN=0 TLB, this is the SDRAM TLB */ |
| #endif |
| tlbwe r0,r4,0 /* Invalidate all entries (V=0)*/ |
| tlbwe r0,r4,1 |
| tlbwe r0,r4,2 |
| tlbnxt: addi r4,r4,1 /* Next TLB */ |
| bdnz rsttlb |
| |
| /*----------------------------------------------------------------*/ |
| /* TLB entry setup -- step thru tlbtab */ |
| /*----------------------------------------------------------------*/ |
| #if defined(CONFIG_440SPE_REVA) |
| /*----------------------------------------------------------------*/ |
| /* We have different TLB tables for revA and rev B of 440SPe */ |
| /*----------------------------------------------------------------*/ |
| mfspr r1, PVR |
| lis r0,0x5342 |
| ori r0,r0,0x1891 |
| cmpw r7,r1,r0 |
| bne r7,..revA |
| bl tlbtabB |
| b ..goon |
| ..revA: |
| bl tlbtabA |
| ..goon: |
| #else |
| bl tlbtab /* Get tlbtab pointer */ |
| #endif |
| mr r5,r0 |
| li r1,0x003f /* 64 TLB entries max */ |
| mtctr r1 |
| li r4,0 /* TLB # */ |
| |
| addi r5,r5,-4 |
| 1: |
| #ifdef CONFIG_SYS_RAMBOOT |
| tlbre r3,r4,0 /* Read contents from TLB word #0 */ |
| rlwinm. r3,r3,0,0x00000200 /* Mask V (valid) bit */ |
| bne tlbnx2 /* Skip V=1 TLB, this is the SDRAM TLB */ |
| #endif |
| lwzu r0,4(r5) |
| cmpwi r0,0 |
| beq 2f /* 0 marks end */ |
| lwzu r1,4(r5) |
| lwzu r2,4(r5) |
| tlbwe r0,r4,0 /* TLB Word 0 */ |
| tlbwe r1,r4,1 /* TLB Word 1 */ |
| tlbwe r2,r4,2 /* TLB Word 2 */ |
| tlbnx2: addi r4,r4,1 /* Next TLB */ |
| bdnz 1b |
| |
| /*----------------------------------------------------------------*/ |
| /* Continue from 'normal' start */ |
| /*----------------------------------------------------------------*/ |
| 2: |
| bl 3f |
| b _start |
| |
| 3: li r0,0 |
| mtspr SPRN_SRR1,r0 /* Keep things disabled for now */ |
| mflr r1 |
| mtspr SPRN_SRR0,r1 |
| rfi |
| #endif /* CONFIG_440 */ |
| |
| /* |
| * r3 - 1st arg to board_init(): IMMP pointer |
| * r4 - 2nd arg to board_init(): boot flag |
| */ |
| #if !defined(CONFIG_SPL_BUILD) |
| .text |
| .long 0x27051956 /* U-Boot Magic Number */ |
| .globl version_string |
| version_string: |
| .ascii U_BOOT_VERSION_STRING, "\0" |
| |
| . = EXC_OFF_SYS_RESET |
| .globl _start_of_vectors |
| _start_of_vectors: |
| |
| /* Critical input. */ |
| CRIT_EXCEPTION(0x100, CritcalInput, UnknownException) |
| |
| #ifdef CONFIG_440 |
| /* Machine check */ |
| MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException) |
| #else |
| CRIT_EXCEPTION(0x200, MachineCheck, MachineCheckException) |
| #endif /* CONFIG_440 */ |
| |
| /* Data Storage exception. */ |
| STD_EXCEPTION(0x300, DataStorage, UnknownException) |
| |
| /* Instruction Storage exception. */ |
| STD_EXCEPTION(0x400, InstStorage, UnknownException) |
| |
| /* External Interrupt exception. */ |
| STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt) |
| |
| /* Alignment exception. */ |
| . = 0x600 |
| Alignment: |
| EXCEPTION_PROLOG(SRR0, SRR1) |
| mfspr r4,DAR |
| stw r4,_DAR(r21) |
| mfspr r5,DSISR |
| stw r5,_DSISR(r21) |
| addi r3,r1,STACK_FRAME_OVERHEAD |
| EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE) |
| |
| /* Program check exception */ |
| . = 0x700 |
| ProgramCheck: |
| EXCEPTION_PROLOG(SRR0, SRR1) |
| addi r3,r1,STACK_FRAME_OVERHEAD |
| EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException, |
| MSR_KERNEL, COPY_EE) |
| |
| #ifdef CONFIG_440 |
| STD_EXCEPTION(0x800, FPUnavailable, UnknownException) |
| STD_EXCEPTION(0x900, Decrementer, DecrementerPITException) |
| STD_EXCEPTION(0xa00, APU, UnknownException) |
| #endif |
| STD_EXCEPTION(0xc00, SystemCall, UnknownException) |
| |
| #ifdef CONFIG_440 |
| STD_EXCEPTION(0x1300, DataTLBError, UnknownException) |
| STD_EXCEPTION(0x1400, InstructionTLBError, UnknownException) |
| #else |
| STD_EXCEPTION(0x1000, PIT, DecrementerPITException) |
| STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException) |
| STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException) |
| #endif |
| CRIT_EXCEPTION(0x2000, DebugBreakpoint, DebugException ) |
| |
| .globl _end_of_vectors |
| _end_of_vectors: |
| . = _START_OFFSET |
| #endif |
| .globl _start |
| _start: |
| |
| #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD) |
| /* |
| * This is the entry of the real U-Boot from a board port |
| * that supports SPL booting on the PPC4xx. We only need |
| * to call board_init_f() here. Everything else has already |
| * been done in the SPL u-boot version. |
| */ |
| GET_GOT /* initialize GOT access */ |
| bl board_init_f /* run 1st part of board init code (in Flash)*/ |
| /* NOTREACHED - board_init_f() does not return */ |
| #endif |
| |
| /*****************************************************************************/ |
| #if defined(CONFIG_440) |
| |
| /*----------------------------------------------------------------*/ |
| /* Clear and set up some registers. */ |
| /*----------------------------------------------------------------*/ |
| li r0,0x0000 |
| lis r1,0xffff |
| mtspr SPRN_DEC,r0 /* prevent dec exceptions */ |
| mtspr SPRN_TBWL,r0 /* prevent fit & wdt exceptions */ |
| mtspr SPRN_TBWU,r0 |
| mtspr SPRN_TSR,r1 /* clear all timer exception status */ |
| mtspr SPRN_TCR,r0 /* disable all */ |
| mtspr SPRN_ESR,r0 /* clear exception syndrome register */ |
| mtxer r0 /* clear integer exception register */ |
| |
| /*----------------------------------------------------------------*/ |
| /* Debug setup -- some (not very good) ice's need an event*/ |
| /* to establish control :-( Define CONFIG_SYS_INIT_DBCR to the dbsr */ |
| /* value you need in this case 0x8cff 0000 should do the trick */ |
| /*----------------------------------------------------------------*/ |
| #if defined(CONFIG_SYS_INIT_DBCR) |
| lis r1,0xffff |
| ori r1,r1,0xffff |
| mtspr SPRN_DBSR,r1 /* Clear all status bits */ |
| lis r0,CONFIG_SYS_INIT_DBCR@h |
| ori r0,r0,CONFIG_SYS_INIT_DBCR@l |
| mtspr SPRN_DBCR0,r0 |
| isync |
| #endif |
| |
| /*----------------------------------------------------------------*/ |
| /* Setup the internal SRAM */ |
| /*----------------------------------------------------------------*/ |
| li r0,0 |
| |
| #ifdef CONFIG_SYS_INIT_RAM_DCACHE |
| /* Clear Dcache to use as RAM */ |
| addis r3,r0,CONFIG_SYS_INIT_RAM_ADDR@h |
| ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l |
| addis r4,r0,CONFIG_SYS_INIT_RAM_SIZE@h |
| ori r4,r4,CONFIG_SYS_INIT_RAM_SIZE@l |
| rlwinm. r5,r4,0,27,31 |
| rlwinm r5,r4,27,5,31 |
| beq ..d_ran |
| addi r5,r5,0x0001 |
| ..d_ran: |
| mtctr r5 |
| ..d_ag: |
| dcbz r0,r3 |
| addi r3,r3,32 |
| bdnz ..d_ag |
| |
| /* |
| * Lock the init-ram/stack in d-cache, so that other regions |
| * may use d-cache as well |
| * Note, that this current implementation locks exactly 4k |
| * of d-cache, so please make sure that you don't define a |
| * bigger init-ram area. Take a look at the lwmon5 440EPx |
| * implementation as a reference. |
| */ |
| msync |
| isync |
| /* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */ |
| lis r1,0x0201 |
| ori r1,r1,0xf808 |
| mtspr SPRN_DVLIM,r1 |
| lis r1,0x0808 |
| ori r1,r1,0x0808 |
| mtspr SPRN_DNV0,r1 |
| mtspr SPRN_DNV1,r1 |
| mtspr SPRN_DNV2,r1 |
| mtspr SPRN_DNV3,r1 |
| mtspr SPRN_DTV0,r1 |
| mtspr SPRN_DTV1,r1 |
| mtspr SPRN_DTV2,r1 |
| mtspr SPRN_DTV3,r1 |
| msync |
| isync |
| #endif /* CONFIG_SYS_INIT_RAM_DCACHE */ |
| |
| /* 440EP & 440GR are only 440er PPC's without internal SRAM */ |
| #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) |
| /* not all PPC's have internal SRAM usable as L2-cache */ |
| #if defined(CONFIG_440GX) || \ |
| defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \ |
| defined(CONFIG_460SX) |
| mtdcr L2_CACHE_CFG,r0 /* Ensure L2 Cache is off */ |
| #elif defined(CONFIG_460EX) || defined(CONFIG_460GT) |
| lis r1, 0x0000 |
| ori r1,r1,0x0008 /* Set L2_CACHE_CFG[RDBW]=1 */ |
| mtdcr L2_CACHE_CFG,r1 |
| #endif |
| |
| lis r2,0x7fff |
| ori r2,r2,0xffff |
| mfdcr r1,ISRAM0_DPC |
| and r1,r1,r2 /* Disable parity check */ |
| mtdcr ISRAM0_DPC,r1 |
| mfdcr r1,ISRAM0_PMEG |
| and r1,r1,r2 /* Disable pwr mgmt */ |
| mtdcr ISRAM0_PMEG,r1 |
| |
| lis r1,0x8000 /* BAS = 8000_0000 */ |
| #if defined(CONFIG_440GX) || defined(CONFIG_440SP) |
| ori r1,r1,0x0980 /* first 64k */ |
| mtdcr ISRAM0_SB0CR,r1 |
| lis r1,0x8001 |
| ori r1,r1,0x0980 /* second 64k */ |
| mtdcr ISRAM0_SB1CR,r1 |
| lis r1, 0x8002 |
| ori r1,r1, 0x0980 /* third 64k */ |
| mtdcr ISRAM0_SB2CR,r1 |
| lis r1, 0x8003 |
| ori r1,r1, 0x0980 /* fourth 64k */ |
| mtdcr ISRAM0_SB3CR,r1 |
| #elif defined(CONFIG_440SPE) || defined(CONFIG_460EX) || \ |
| defined(CONFIG_460GT) |
| lis r1,0x0000 /* BAS = X_0000_0000 */ |
| ori r1,r1,0x0984 /* first 64k */ |
| mtdcr ISRAM0_SB0CR,r1 |
| lis r1,0x0001 |
| ori r1,r1,0x0984 /* second 64k */ |
| mtdcr ISRAM0_SB1CR,r1 |
| lis r1, 0x0002 |
| ori r1,r1, 0x0984 /* third 64k */ |
| mtdcr ISRAM0_SB2CR,r1 |
| lis r1, 0x0003 |
| ori r1,r1, 0x0984 /* fourth 64k */ |
| mtdcr ISRAM0_SB3CR,r1 |
| #if defined(CONFIG_460EX) || defined(CONFIG_460GT) |
| lis r2,0x7fff |
| ori r2,r2,0xffff |
| mfdcr r1,ISRAM1_DPC |
| and r1,r1,r2 /* Disable parity check */ |
| mtdcr ISRAM1_DPC,r1 |
| mfdcr r1,ISRAM1_PMEG |
| and r1,r1,r2 /* Disable pwr mgmt */ |
| mtdcr ISRAM1_PMEG,r1 |
| |
| lis r1,0x0004 /* BAS = 4_0004_0000 */ |
| ori r1,r1,ISRAM1_SIZE /* ocm size */ |
| mtdcr ISRAM1_SB0CR,r1 |
| #endif |
| #elif defined(CONFIG_460SX) |
| lis r1,0x0000 /* BAS = 0000_0000 */ |
| ori r1,r1,0x0B84 /* first 128k */ |
| mtdcr ISRAM0_SB0CR,r1 |
| lis r1,0x0001 |
| ori r1,r1,0x0B84 /* second 128k */ |
| mtdcr ISRAM0_SB1CR,r1 |
| lis r1, 0x0002 |
| ori r1,r1, 0x0B84 /* third 128k */ |
| mtdcr ISRAM0_SB2CR,r1 |
| lis r1, 0x0003 |
| ori r1,r1, 0x0B84 /* fourth 128k */ |
| mtdcr ISRAM0_SB3CR,r1 |
| #elif defined(CONFIG_440GP) |
| ori r1,r1,0x0380 /* 8k rw */ |
| mtdcr ISRAM0_SB0CR,r1 |
| mtdcr ISRAM0_SB1CR,r0 /* Disable bank 1 */ |
| #endif |
| #endif /* #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) */ |
| |
| /*----------------------------------------------------------------*/ |
| /* Setup the stack in internal SRAM */ |
| /*----------------------------------------------------------------*/ |
| lis r1,CONFIG_SYS_INIT_RAM_ADDR@h |
| ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l |
| li r0,0 |
| stwu r0,-4(r1) |
| stwu r0,-4(r1) /* Terminate call chain */ |
| |
| stwu r1,-8(r1) /* Save back chain and move SP */ |
| lis r0,RESET_VECTOR@h /* Address of reset vector */ |
| ori r0,r0, RESET_VECTOR@l |
| stwu r1,-8(r1) /* Save back chain and move SP */ |
| stw r0,+12(r1) /* Save return addr (underflow vect) */ |
| |
| #ifndef CONFIG_SPL_BUILD |
| GET_GOT |
| #endif |
| |
| bl cpu_init_f /* run low-level CPU init code (from Flash) */ |
| #ifdef CONFIG_SYS_GENERIC_BOARD |
| mr r3, r1 |
| bl board_init_f_alloc_reserve |
| mr r1, r3 |
| bl board_init_f_init_reserve |
| li r0,0 |
| stwu r0, -4(r1) |
| stwu r0, -4(r1) |
| #endif |
| li r3, 0 |
| bl board_init_f |
| /* NOTREACHED - board_init_f() does not return */ |
| |
| #endif /* CONFIG_440 */ |
| |
| /*****************************************************************************/ |
| #if defined(CONFIG_405GP) || \ |
| defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \ |
| defined(CONFIG_405EX) || defined(CONFIG_405) |
| /*----------------------------------------------------------------------- */ |
| /* Clear and set up some registers. */ |
| /*----------------------------------------------------------------------- */ |
| addi r4,r0,0x0000 |
| #if !defined(CONFIG_405EX) |
| mtspr SPRN_SGR,r4 |
| #else |
| /* |
| * On 405EX, completely clearing the SGR leads to PPC hangup |
| * upon PCIe configuration access. The PCIe memory regions |
| * need to be guarded! |
| */ |
| lis r3,0x0000 |
| ori r3,r3,0x7FFC |
| mtspr SPRN_SGR,r3 |
| #endif |
| mtspr SPRN_DCWR,r4 |
| mtesr r4 /* clear Exception Syndrome Reg */ |
| mttcr r4 /* clear Timer Control Reg */ |
| mtxer r4 /* clear Fixed-Point Exception Reg */ |
| mtevpr r4 /* clear Exception Vector Prefix Reg */ |
| addi r4,r0,(0xFFFF-0x10000) /* set r4 to 0xFFFFFFFF (status in the */ |
| /* dbsr is cleared by setting bits to 1) */ |
| mtdbsr r4 /* clear/reset the dbsr */ |
| |
| /* Invalidate the i- and d-caches. */ |
| bl invalidate_icache |
| bl invalidate_dcache |
| |
| /* Set-up icache cacheability. */ |
| lis r4, CONFIG_SYS_ICACHE_SACR_VALUE@h |
| ori r4, r4, CONFIG_SYS_ICACHE_SACR_VALUE@l |
| mticcr r4 |
| isync |
| |
| /* Set-up dcache cacheability. */ |
| lis r4, CONFIG_SYS_DCACHE_SACR_VALUE@h |
| ori r4, r4, CONFIG_SYS_DCACHE_SACR_VALUE@l |
| mtdccr r4 |
| |
| #if !(defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))\ |
| && !defined (CONFIG_XILINX_405) |
| /*----------------------------------------------------------------------- */ |
| /* Tune the speed and size for flash CS0 */ |
| /*----------------------------------------------------------------------- */ |
| bl ext_bus_cntlr_init |
| #endif |
| |
| #if !(defined(CONFIG_SYS_INIT_DCACHE_CS) || defined(CONFIG_SYS_TEMP_STACK_OCM)) |
| /* |
| * For boards that don't have OCM and can't use the data cache |
| * for their primordial stack, setup stack here directly after the |
| * SDRAM is initialized in ext_bus_cntlr_init. |
| */ |
| lis r1, CONFIG_SYS_INIT_RAM_ADDR@h |
| ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack in SDRAM */ |
| |
| li r0, 0 /* Make room for stack frame header and */ |
| stwu r0, -4(r1) /* clear final stack frame so that */ |
| stwu r0, -4(r1) /* stack backtraces terminate cleanly */ |
| /* |
| * Set up a dummy frame to store reset vector as return address. |
| * this causes stack underflow to reset board. |
| */ |
| stwu r1, -8(r1) /* Save back chain and move SP */ |
| lis r0, RESET_VECTOR@h /* Address of reset vector */ |
| ori r0, r0, RESET_VECTOR@l |
| stwu r1, -8(r1) /* Save back chain and move SP */ |
| stw r0, +12(r1) /* Save return addr (underflow vect) */ |
| #endif /* !(CONFIG_SYS_INIT_DCACHE_CS || !CONFIG_SYS_TEM_STACK_OCM) */ |
| |
| #if defined(CONFIG_405EP) |
| /*----------------------------------------------------------------------- */ |
| /* DMA Status, clear to come up clean */ |
| /*----------------------------------------------------------------------- */ |
| addis r3,r0, 0xFFFF /* Clear all existing DMA status */ |
| ori r3,r3, 0xFFFF |
| mtdcr DMASR, r3 |
| |
| bl ppc405ep_init /* do ppc405ep specific init */ |
| #endif /* CONFIG_405EP */ |
| |
| #if defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE) |
| #if defined(CONFIG_405EZ) |
| /******************************************************************** |
| * Setup OCM - On Chip Memory - PPC405EZ uses OCM Controller V2 |
| *******************************************************************/ |
| /* |
| * We can map the OCM on the PLB3, so map it at |
| * CONFIG_SYS_OCM_DATA_ADDR + 0x8000 |
| */ |
| lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */ |
| ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l |
| ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */ |
| mtdcr OCM0_PLBCR1,r3 /* Set PLB Access */ |
| ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */ |
| mtdcr OCM0_PLBCR2,r3 /* Set PLB Access */ |
| isync |
| |
| lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */ |
| ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l |
| ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */ |
| mtdcr OCM0_DSRC1, r3 /* Set Data Side */ |
| mtdcr OCM0_ISRC1, r3 /* Set Instruction Side */ |
| ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */ |
| mtdcr OCM0_DSRC2, r3 /* Set Data Side */ |
| mtdcr OCM0_ISRC2, r3 /* Set Instruction Side */ |
| addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */ |
| mtdcr OCM0_DISDPC,r3 |
| |
| isync |
| #else /* CONFIG_405EZ */ |
| /******************************************************************** |
| * Setup OCM - On Chip Memory |
| *******************************************************************/ |
| /* Setup OCM */ |
| lis r0, 0x7FFF |
| ori r0, r0, 0xFFFF |
| mfdcr r3, OCM0_ISCNTL /* get instr-side IRAM config */ |
| mfdcr r4, OCM0_DSCNTL /* get data-side IRAM config */ |
| and r3, r3, r0 /* disable data-side IRAM */ |
| and r4, r4, r0 /* disable data-side IRAM */ |
| mtdcr OCM0_ISCNTL, r3 /* set instr-side IRAM config */ |
| mtdcr OCM0_DSCNTL, r4 /* set data-side IRAM config */ |
| isync |
| |
| lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */ |
| ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l |
| mtdcr OCM0_DSARC, r3 |
| addis r4, 0, 0xC000 /* OCM data area enabled */ |
| mtdcr OCM0_DSCNTL, r4 |
| isync |
| #endif /* CONFIG_405EZ */ |
| #endif |
| |
| /*----------------------------------------------------------------------- */ |
| /* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */ |
| /*----------------------------------------------------------------------- */ |
| #ifdef CONFIG_SYS_INIT_DCACHE_CS |
| li r4, PBxAP |
| mtdcr EBC0_CFGADDR, r4 |
| lis r4, CONFIG_SYS_INIT_DCACHE_PBxAR@h |
| ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxAR@l |
| mtdcr EBC0_CFGDATA, r4 |
| |
| addi r4, 0, PBxCR |
| mtdcr EBC0_CFGADDR, r4 |
| lis r4, CONFIG_SYS_INIT_DCACHE_PBxCR@h |
| ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxCR@l |
| mtdcr EBC0_CFGDATA, r4 |
| |
| /* |
| * Enable the data cache for the 128MB storage access control region |
| * at CONFIG_SYS_INIT_RAM_ADDR. |
| */ |
| mfdccr r4 |
| oris r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h |
| ori r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l |
| mtdccr r4 |
| |
| /* |
| * Preallocate data cache lines to be used to avoid a subsequent |
| * cache miss and an ensuing machine check exception when exceptions |
| * are enabled. |
| */ |
| li r0, 0 |
| |
| lis r3, CONFIG_SYS_INIT_RAM_ADDR@h |
| ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l |
| |
| lis r4, CONFIG_SYS_INIT_RAM_SIZE@h |
| ori r4, r4, CONFIG_SYS_INIT_RAM_SIZE@l |
| |
| /* |
| * Convert the size, in bytes, to the number of cache lines/blocks |
| * to preallocate. |
| */ |
| clrlwi. r5, r4, (32 - L1_CACHE_SHIFT) |
| srwi r5, r4, L1_CACHE_SHIFT |
| beq ..load_counter |
| addi r5, r5, 0x0001 |
| ..load_counter: |
| mtctr r5 |
| |
| /* Preallocate the computed number of cache blocks. */ |
| ..alloc_dcache_block: |
| dcba r0, r3 |
| addi r3, r3, L1_CACHE_BYTES |
| bdnz ..alloc_dcache_block |
| sync |
| |
| /* |
| * Load the initial stack pointer and data area and convert the size, |
| * in bytes, to the number of words to initialize to a known value. |
| */ |
| lis r1, CONFIG_SYS_INIT_RAM_ADDR@h |
| ori r1, r1, CONFIG_SYS_INIT_SP_OFFSET@l |
| |
| lis r4, (CONFIG_SYS_INIT_RAM_SIZE >> 2)@h |
| ori r4, r4, (CONFIG_SYS_INIT_RAM_SIZE >> 2)@l |
| mtctr r4 |
| |
| lis r2, CONFIG_SYS_INIT_RAM_ADDR@h |
| ori r2, r2, CONFIG_SYS_INIT_RAM_SIZE@l |
| |
| lis r4, CONFIG_SYS_INIT_RAM_PATTERN@h |
| ori r4, r4, CONFIG_SYS_INIT_RAM_PATTERN@l |
| |
| ..stackloop: |
| stwu r4, -4(r2) |
| bdnz ..stackloop |
| |
| /* |
| * Make room for stack frame header and clear final stack frame so |
| * that stack backtraces terminate cleanly. |
| */ |
| stwu r0, -4(r1) |
| stwu r0, -4(r1) |
| |
| /* |
| * Set up a dummy frame to store reset vector as return address. |
| * this causes stack underflow to reset board. |
| */ |
| stwu r1, -8(r1) /* Save back chain and move SP */ |
| addis r0, 0, RESET_VECTOR@h /* Address of reset vector */ |
| ori r0, r0, RESET_VECTOR@l |
| stwu r1, -8(r1) /* Save back chain and move SP */ |
| stw r0, +12(r1) /* Save return addr (underflow vect) */ |
| |
| #elif defined(CONFIG_SYS_TEMP_STACK_OCM) && \ |
| (defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE)) |
| /* |
| * Stack in OCM. |
| */ |
| |
| /* Set up Stack at top of OCM */ |
| lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@h |
| ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@l |
| |
| /* Set up a zeroized stack frame so that backtrace works right */ |
| li r0, 0 |
| stwu r0, -4(r1) |
| stwu r0, -4(r1) |
| |
| /* |
| * Set up a dummy frame to store reset vector as return address. |
| * this causes stack underflow to reset board. |
| */ |
| stwu r1, -8(r1) /* Save back chain and move SP */ |
| lis r0, RESET_VECTOR@h /* Address of reset vector */ |
| ori r0, r0, RESET_VECTOR@l |
| stwu r1, -8(r1) /* Save back chain and move SP */ |
| stw r0, +12(r1) /* Save return addr (underflow vect) */ |
| #endif /* CONFIG_SYS_INIT_DCACHE_CS */ |
| |
| GET_GOT /* initialize GOT access */ |
| |
| bl cpu_init_f /* run low-level CPU init code (from Flash) */ |
| #ifdef CONFIG_SYS_GENERIC_BOARD |
| mr r3, r1 |
| bl board_init_f_alloc_reserve |
| mr r1, r3 |
| bl board_init_f_init_reserve |
| stwu r0, -4(r1) |
| stwu r0, -4(r1) |
| #endif |
| li r3, 0 |
| bl board_init_f /* run first part of init code (from Flash) */ |
| /* NOTREACHED - board_init_f() does not return */ |
| |
| #endif /* CONFIG_405GP || CONFIG_405 || CONFIG_405EP */ |
| /*----------------------------------------------------------------------- */ |
| |
| |
| #if !defined(CONFIG_SPL_BUILD) |
| /* |
| * This code finishes saving the registers to the exception frame |
| * and jumps to the appropriate handler for the exception. |
| * Register r21 is pointer into trap frame, r1 has new stack pointer. |
| */ |
| .globl transfer_to_handler |
| transfer_to_handler: |
| stw r22,_NIP(r21) |
| lis r22,MSR_POW@h |
| andc r23,r23,r22 |
| stw r23,_MSR(r21) |
| SAVE_GPR(7, r21) |
| SAVE_4GPRS(8, r21) |
| SAVE_8GPRS(12, r21) |
| SAVE_8GPRS(24, r21) |
| mflr r23 |
| andi. r24,r23,0x3f00 /* get vector offset */ |
| stw r24,TRAP(r21) |
| li r22,0 |
| stw r22,RESULT(r21) |
| mtspr SPRG2,r22 /* r1 is now kernel sp */ |
| lwz r24,0(r23) /* virtual address of handler */ |
| lwz r23,4(r23) /* where to go when done */ |
| mtspr SRR0,r24 |
| mtspr SRR1,r20 |
| mtlr r23 |
| SYNC |
| rfi /* jump to handler, enable MMU */ |
| |
| int_return: |
| mfmsr r28 /* Disable interrupts */ |
| li r4,0 |
| ori r4,r4,MSR_EE |
| andc r28,r28,r4 |
| SYNC /* Some chip revs need this... */ |
| mtmsr r28 |
| SYNC |
| lwz r2,_CTR(r1) |
| lwz r0,_LINK(r1) |
| mtctr r2 |
| mtlr r0 |
| lwz r2,_XER(r1) |
| lwz r0,_CCR(r1) |
| mtspr XER,r2 |
| mtcrf 0xFF,r0 |
| REST_10GPRS(3, r1) |
| REST_10GPRS(13, r1) |
| REST_8GPRS(23, r1) |
| REST_GPR(31, r1) |
| lwz r2,_NIP(r1) /* Restore environment */ |
| lwz r0,_MSR(r1) |
| mtspr SRR0,r2 |
| mtspr SRR1,r0 |
| lwz r0,GPR0(r1) |
| lwz r2,GPR2(r1) |
| lwz r1,GPR1(r1) |
| SYNC |
| rfi |
| |
| crit_return: |
| mfmsr r28 /* Disable interrupts */ |
| li r4,0 |
| ori r4,r4,MSR_EE |
| andc r28,r28,r4 |
| SYNC /* Some chip revs need this... */ |
| mtmsr r28 |
| SYNC |
| lwz r2,_CTR(r1) |
| lwz r0,_LINK(r1) |
| mtctr r2 |
| mtlr r0 |
| lwz r2,_XER(r1) |
| lwz r0,_CCR(r1) |
| mtspr XER,r2 |
| mtcrf 0xFF,r0 |
| REST_10GPRS(3, r1) |
| REST_10GPRS(13, r1) |
| REST_8GPRS(23, r1) |
| REST_GPR(31, r1) |
| lwz r2,_NIP(r1) /* Restore environment */ |
| lwz r0,_MSR(r1) |
| mtspr SPRN_CSRR0,r2 |
| mtspr SPRN_CSRR1,r0 |
| lwz r0,GPR0(r1) |
| lwz r2,GPR2(r1) |
| lwz r1,GPR1(r1) |
| SYNC |
| rfci |
| |
| #ifdef CONFIG_440 |
| mck_return: |
| mfmsr r28 /* Disable interrupts */ |
| li r4,0 |
| ori r4,r4,MSR_EE |
| andc r28,r28,r4 |
| SYNC /* Some chip revs need this... */ |
| mtmsr r28 |
| SYNC |
| lwz r2,_CTR(r1) |
| lwz r0,_LINK(r1) |
| mtctr r2 |
| mtlr r0 |
| lwz r2,_XER(r1) |
| lwz r0,_CCR(r1) |
| mtspr XER,r2 |
| mtcrf 0xFF,r0 |
| REST_10GPRS(3, r1) |
| REST_10GPRS(13, r1) |
| REST_8GPRS(23, r1) |
| REST_GPR(31, r1) |
| lwz r2,_NIP(r1) /* Restore environment */ |
| lwz r0,_MSR(r1) |
| mtspr SPRN_MCSRR0,r2 |
| mtspr SPRN_MCSRR1,r0 |
| lwz r0,GPR0(r1) |
| lwz r2,GPR2(r1) |
| lwz r1,GPR1(r1) |
| SYNC |
| rfmci |
| #endif /* CONFIG_440 */ |
| |
| |
| .globl get_pvr |
| get_pvr: |
| mfspr r3, PVR |
| blr |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: out16 */ |
| /* Description: Output 16 bits */ |
| /*------------------------------------------------------------------------------- */ |
| .globl out16 |
| out16: |
| sth r4,0x0000(r3) |
| blr |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: out16r */ |
| /* Description: Byte reverse and output 16 bits */ |
| /*------------------------------------------------------------------------------- */ |
| .globl out16r |
| out16r: |
| sthbrx r4,r0,r3 |
| blr |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: out32r */ |
| /* Description: Byte reverse and output 32 bits */ |
| /*------------------------------------------------------------------------------- */ |
| .globl out32r |
| out32r: |
| stwbrx r4,r0,r3 |
| blr |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: in16 */ |
| /* Description: Input 16 bits */ |
| /*------------------------------------------------------------------------------- */ |
| .globl in16 |
| in16: |
| lhz r3,0x0000(r3) |
| blr |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: in16r */ |
| /* Description: Input 16 bits and byte reverse */ |
| /*------------------------------------------------------------------------------- */ |
| .globl in16r |
| in16r: |
| lhbrx r3,r0,r3 |
| blr |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: in32r */ |
| /* Description: Input 32 bits and byte reverse */ |
| /*------------------------------------------------------------------------------- */ |
| .globl in32r |
| in32r: |
| lwbrx r3,r0,r3 |
| blr |
| |
| #if !defined(CONFIG_SPL_BUILD) |
| /* |
| * void relocate_code (addr_sp, gd, addr_moni) |
| * |
| * This "function" does not return, instead it continues in RAM |
| * after relocating the monitor code. |
| * |
| * r3 = Relocated stack pointer |
| * r4 = Relocated global data pointer |
| * r5 = Relocated text pointer |
| */ |
| .globl relocate_code |
| relocate_code: |
| #if defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS) |
| /* |
| * We need to flush the initial global data (gd_t) and bd_info |
| * before the dcache will be invalidated. |
| */ |
| |
| /* Save registers */ |
| mr r9, r3 |
| mr r10, r4 |
| mr r11, r5 |
| |
| /* |
| * Flush complete dcache, this is faster than flushing the |
| * ranges for global_data and bd_info instead. |
| */ |
| bl flush_dcache |
| |
| #if defined(CONFIG_SYS_INIT_DCACHE_CS) |
| /* |
| * Undo the earlier data cache set-up for the primordial stack and |
| * data area. First, invalidate the data cache and then disable data |
| * cacheability for that area. Finally, restore the EBC values, if |
| * any. |
| */ |
| |
| /* Invalidate the primordial stack and data area in cache */ |
| lis r3, CONFIG_SYS_INIT_RAM_ADDR@h |
| ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l |
| |
| lis r4, CONFIG_SYS_INIT_RAM_SIZE@h |
| ori r4, r4, CONFIG_SYS_INIT_RAM_SIZE@l |
| add r4, r4, r3 |
| |
| bl invalidate_dcache_range |
| |
| /* Disable cacheability for the region */ |
| mfdccr r3 |
| lis r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h |
| ori r4, r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l |
| and r3, r3, r4 |
| mtdccr r3 |
| |
| /* Restore the EBC parameters */ |
| li r3, PBxAP |
| mtdcr EBC0_CFGADDR, r3 |
| lis r3, PBxAP_VAL@h |
| ori r3, r3, PBxAP_VAL@l |
| mtdcr EBC0_CFGDATA, r3 |
| |
| li r3, PBxCR |
| mtdcr EBC0_CFGADDR, r3 |
| lis r3, PBxCR_VAL@h |
| ori r3, r3, PBxCR_VAL@l |
| mtdcr EBC0_CFGDATA, r3 |
| #endif /* defined(CONFIG_SYS_INIT_DCACHE_CS) */ |
| |
| /* Restore registers */ |
| mr r3, r9 |
| mr r4, r10 |
| mr r5, r11 |
| #endif /* defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS) */ |
| |
| #ifdef CONFIG_SYS_INIT_RAM_DCACHE |
| /* |
| * Unlock the previously locked d-cache |
| */ |
| msync |
| isync |
| /* set TFLOOR/NFLOOR to 0 again */ |
| lis r6,0x0001 |
| ori r6,r6,0xf800 |
| mtspr SPRN_DVLIM,r6 |
| lis r6,0x0000 |
| ori r6,r6,0x0000 |
| mtspr SPRN_DNV0,r6 |
| mtspr SPRN_DNV1,r6 |
| mtspr SPRN_DNV2,r6 |
| mtspr SPRN_DNV3,r6 |
| mtspr SPRN_DTV0,r6 |
| mtspr SPRN_DTV1,r6 |
| mtspr SPRN_DTV2,r6 |
| mtspr SPRN_DTV3,r6 |
| msync |
| isync |
| |
| /* Invalidate data cache, now no longer our stack */ |
| dccci 0,0 |
| sync |
| isync |
| #endif /* CONFIG_SYS_INIT_RAM_DCACHE */ |
| |
| /* |
| * On some 440er platforms the cache is enabled in the first TLB (Boot-CS) |
| * to speed up the boot process. Now this cache needs to be disabled. |
| */ |
| #if defined(CONFIG_440) |
| /* Clear all potential pending exceptions */ |
| mfspr r1,SPRN_MCSR |
| mtspr SPRN_MCSR,r1 |
| addi r1,r0,CONFIG_SYS_TLB_FOR_BOOT_FLASH /* Use defined TLB */ |
| tlbre r0,r1,0x0002 /* Read contents */ |
| ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */ |
| tlbwe r0,r1,0x0002 /* Save it out */ |
| sync |
| isync |
| #endif /* defined(CONFIG_440) */ |
| mr r1, r3 /* Set new stack pointer */ |
| mr r9, r4 /* Save copy of Init Data pointer */ |
| mr r10, r5 /* Save copy of Destination Address */ |
| |
| GET_GOT |
| mr r3, r5 /* Destination Address */ |
| lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */ |
| ori r4, r4, CONFIG_SYS_MONITOR_BASE@l |
| lwz r5, GOT(__init_end) |
| sub r5, r5, r4 |
| li r6, L1_CACHE_BYTES /* Cache Line Size */ |
| |
| /* |
| * Fix GOT pointer: |
| * |
| * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address |
| * |
| * Offset: |
| */ |
| sub r15, r10, r4 |
| |
| /* First our own GOT */ |
| add r12, r12, r15 |
| /* then the one used by the C code */ |
| add r30, r30, r15 |
| |
| /* |
| * Now relocate code |
| */ |
| |
| cmplw cr1,r3,r4 |
| addi r0,r5,3 |
| srwi. r0,r0,2 |
| beq cr1,4f /* In place copy is not necessary */ |
| beq 7f /* Protect against 0 count */ |
| mtctr r0 |
| bge cr1,2f |
| |
| la r8,-4(r4) |
| la r7,-4(r3) |
| 1: lwzu r0,4(r8) |
| stwu r0,4(r7) |
| bdnz 1b |
| b 4f |
| |
| 2: slwi r0,r0,2 |
| add r8,r4,r0 |
| add r7,r3,r0 |
| 3: lwzu r0,-4(r8) |
| stwu r0,-4(r7) |
| bdnz 3b |
| |
| /* |
| * Now flush the cache: note that we must start from a cache aligned |
| * address. Otherwise we might miss one cache line. |
| */ |
| 4: cmpwi r6,0 |
| add r5,r3,r5 |
| beq 7f /* Always flush prefetch queue in any case */ |
| subi r0,r6,1 |
| andc r3,r3,r0 |
| mr r4,r3 |
| 5: dcbst 0,r4 |
| add r4,r4,r6 |
| cmplw r4,r5 |
| blt 5b |
| sync /* Wait for all dcbst to complete on bus */ |
| mr r4,r3 |
| 6: icbi 0,r4 |
| add r4,r4,r6 |
| cmplw r4,r5 |
| blt 6b |
| 7: sync /* Wait for all icbi to complete on bus */ |
| isync |
| |
| /* |
| * We are done. Do not return, instead branch to second part of board |
| * initialization, now running from RAM. |
| */ |
| |
| addi r0, r10, in_ram - _start + _START_OFFSET |
| mtlr r0 |
| blr /* NEVER RETURNS! */ |
| |
| in_ram: |
| |
| /* |
| * Relocation Function, r12 point to got2+0x8000 |
| * |
| * Adjust got2 pointers, no need to check for 0, this code |
| * already puts a few entries in the table. |
| */ |
| li r0,__got2_entries@sectoff@l |
| la r3,GOT(_GOT2_TABLE_) |
| lwz r11,GOT(_GOT2_TABLE_) |
| mtctr r0 |
| sub r11,r3,r11 |
| addi r3,r3,-4 |
| 1: lwzu r0,4(r3) |
| cmpwi r0,0 |
| beq- 2f |
| add r0,r0,r11 |
| stw r0,0(r3) |
| 2: bdnz 1b |
| |
| /* |
| * Now adjust the fixups and the pointers to the fixups |
| * in case we need to move ourselves again. |
| */ |
| li r0,__fixup_entries@sectoff@l |
| lwz r3,GOT(_FIXUP_TABLE_) |
| cmpwi r0,0 |
| mtctr r0 |
| addi r3,r3,-4 |
| beq 4f |
| 3: lwzu r4,4(r3) |
| lwzux r0,r4,r11 |
| cmpwi r0,0 |
| add r0,r0,r11 |
| stw r4,0(r3) |
| beq- 5f |
| stw r0,0(r4) |
| 5: bdnz 3b |
| 4: |
| clear_bss: |
| /* |
| * Now clear BSS segment |
| */ |
| lwz r3,GOT(__bss_start) |
| lwz r4,GOT(__bss_end) |
| |
| cmplw 0, r3, r4 |
| beq 7f |
| |
| li r0, 0 |
| |
| andi. r5, r4, 3 |
| beq 6f |
| sub r4, r4, r5 |
| mtctr r5 |
| mr r5, r4 |
| 5: stb r0, 0(r5) |
| addi r5, r5, 1 |
| bdnz 5b |
| 6: |
| stw r0, 0(r3) |
| addi r3, r3, 4 |
| cmplw 0, r3, r4 |
| bne 6b |
| |
| 7: |
| mr r3, r9 /* Init Data pointer */ |
| mr r4, r10 /* Destination Address */ |
| bl board_init_r |
| |
| /* |
| * Copy exception vector code to low memory |
| * |
| * r3: dest_addr |
| * r7: source address, r8: end address, r9: target address |
| */ |
| .globl trap_init |
| trap_init: |
| mflr r4 /* save link register */ |
| GET_GOT |
| lwz r7, GOT(_start_of_vectors) |
| lwz r8, GOT(_end_of_vectors) |
| |
| li r9, 0x100 /* reset vector always at 0x100 */ |
| |
| cmplw 0, r7, r8 |
| bgelr /* return if r7>=r8 - just in case */ |
| 1: |
| lwz r0, 0(r7) |
| stw r0, 0(r9) |
| addi r7, r7, 4 |
| addi r9, r9, 4 |
| cmplw 0, r7, r8 |
| bne 1b |
| |
| /* |
| * relocate `hdlr' and `int_return' entries |
| */ |
| li r7, .L_MachineCheck - _start + _START_OFFSET |
| li r8, Alignment - _start + _START_OFFSET |
| 2: |
| bl trap_reloc |
| addi r7, r7, 0x100 /* next exception vector */ |
| cmplw 0, r7, r8 |
| blt 2b |
| |
| li r7, .L_Alignment - _start + _START_OFFSET |
| bl trap_reloc |
| |
| li r7, .L_ProgramCheck - _start + _START_OFFSET |
| bl trap_reloc |
| |
| #ifdef CONFIG_440 |
| li r7, .L_FPUnavailable - _start + _START_OFFSET |
| bl trap_reloc |
| |
| li r7, .L_Decrementer - _start + _START_OFFSET |
| bl trap_reloc |
| |
| li r7, .L_APU - _start + _START_OFFSET |
| bl trap_reloc |
| |
| li r7, .L_InstructionTLBError - _start + _START_OFFSET |
| bl trap_reloc |
| |
| li r7, .L_DataTLBError - _start + _START_OFFSET |
| bl trap_reloc |
| #else /* CONFIG_440 */ |
| li r7, .L_PIT - _start + _START_OFFSET |
| bl trap_reloc |
| |
| li r7, .L_InstructionTLBMiss - _start + _START_OFFSET |
| bl trap_reloc |
| |
| li r7, .L_DataTLBMiss - _start + _START_OFFSET |
| bl trap_reloc |
| #endif /* CONFIG_440 */ |
| |
| li r7, .L_DebugBreakpoint - _start + _START_OFFSET |
| bl trap_reloc |
| |
| #if !defined(CONFIG_440) |
| addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */ |
| oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */ |
| mtmsr r7 /* change MSR */ |
| #else |
| bl __440_msr_set |
| b __440_msr_continue |
| |
| __440_msr_set: |
| addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */ |
| oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */ |
| mtspr SPRN_SRR1,r7 |
| mflr r7 |
| mtspr SPRN_SRR0,r7 |
| rfi |
| __440_msr_continue: |
| #endif |
| |
| mtlr r4 /* restore link register */ |
| blr |
| #endif /* CONFIG_SPL_BUILD */ |
| |
| #if defined(CONFIG_440) |
| /*----------------------------------------------------------------------------+ |
| | dcbz_area. |
| +----------------------------------------------------------------------------*/ |
| function_prolog(dcbz_area) |
| rlwinm. r5,r4,0,27,31 |
| rlwinm r5,r4,27,5,31 |
| beq ..d_ra2 |
| addi r5,r5,0x0001 |
| ..d_ra2:mtctr r5 |
| ..d_ag2:dcbz r0,r3 |
| addi r3,r3,32 |
| bdnz ..d_ag2 |
| sync |
| blr |
| function_epilog(dcbz_area) |
| #endif /* CONFIG_440 */ |
| #endif /* CONFIG_SPL_BUILD */ |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: in8 */ |
| /* Description: Input 8 bits */ |
| /*------------------------------------------------------------------------------- */ |
| .globl in8 |
| in8: |
| lbz r3,0x0000(r3) |
| blr |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: out8 */ |
| /* Description: Output 8 bits */ |
| /*------------------------------------------------------------------------------- */ |
| .globl out8 |
| out8: |
| stb r4,0x0000(r3) |
| blr |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: out32 */ |
| /* Description: Output 32 bits */ |
| /*------------------------------------------------------------------------------- */ |
| .globl out32 |
| out32: |
| stw r4,0x0000(r3) |
| blr |
| |
| /*------------------------------------------------------------------------------- */ |
| /* Function: in32 */ |
| /* Description: Input 32 bits */ |
| /*------------------------------------------------------------------------------- */ |
| .globl in32 |
| in32: |
| lwz 3,0x0000(3) |
| blr |
| |
| /**************************************************************************/ |
| /* PPC405EP specific stuff */ |
| /**************************************************************************/ |
| #ifdef CONFIG_405EP |
| ppc405ep_init: |
| |
| #ifdef CONFIG_BUBINGA |
| /* |
| * Initialize EBC chip selects 1 & 4 and GPIO pins (for alternate |
| * function) to support FPGA and NVRAM accesses below. |
| */ |
| |
| lis r3,GPIO0_OSRH@h /* config GPIO output select */ |
| ori r3,r3,GPIO0_OSRH@l |
| lis r4,CONFIG_SYS_GPIO0_OSRH@h |
| ori r4,r4,CONFIG_SYS_GPIO0_OSRH@l |
| stw r4,0(r3) |
| lis r3,GPIO0_OSRL@h |
| ori r3,r3,GPIO0_OSRL@l |
| lis r4,CONFIG_SYS_GPIO0_OSRL@h |
| ori r4,r4,CONFIG_SYS_GPIO0_OSRL@l |
| stw r4,0(r3) |
| |
| lis r3,GPIO0_ISR1H@h /* config GPIO input select */ |
| ori r3,r3,GPIO0_ISR1H@l |
| lis r4,CONFIG_SYS_GPIO0_ISR1H@h |
| ori r4,r4,CONFIG_SYS_GPIO0_ISR1H@l |
| stw r4,0(r3) |
| lis r3,GPIO0_ISR1L@h |
| ori r3,r3,GPIO0_ISR1L@l |
| lis r4,CONFIG_SYS_GPIO0_ISR1L@h |
| ori r4,r4,CONFIG_SYS_GPIO0_ISR1L@l |
| stw r4,0(r3) |
| |
| lis r3,GPIO0_TSRH@h /* config GPIO three-state select */ |
| ori r3,r3,GPIO0_TSRH@l |
| lis r4,CONFIG_SYS_GPIO0_TSRH@h |
| ori r4,r4,CONFIG_SYS_GPIO0_TSRH@l |
| stw r4,0(r3) |
| lis r3,GPIO0_TSRL@h |
| ori r3,r3,GPIO0_TSRL@l |
| lis r4,CONFIG_SYS_GPIO0_TSRL@h |
| ori r4,r4,CONFIG_SYS_GPIO0_TSRL@l |
| stw r4,0(r3) |
| |
| lis r3,GPIO0_TCR@h /* config GPIO driver output enables */ |
| ori r3,r3,GPIO0_TCR@l |
| lis r4,CONFIG_SYS_GPIO0_TCR@h |
| ori r4,r4,CONFIG_SYS_GPIO0_TCR@l |
| stw r4,0(r3) |
| |
| li r3,PB1AP /* program EBC bank 1 for RTC access */ |
| mtdcr EBC0_CFGADDR,r3 |
| lis r3,CONFIG_SYS_EBC_PB1AP@h |
| ori r3,r3,CONFIG_SYS_EBC_PB1AP@l |
| mtdcr EBC0_CFGDATA,r3 |
| li r3,PB1CR |
| mtdcr EBC0_CFGADDR,r3 |
| lis r3,CONFIG_SYS_EBC_PB1CR@h |
| ori r3,r3,CONFIG_SYS_EBC_PB1CR@l |
| mtdcr EBC0_CFGDATA,r3 |
| |
| li r3,PB1AP /* program EBC bank 1 for RTC access */ |
| mtdcr EBC0_CFGADDR,r3 |
| lis r3,CONFIG_SYS_EBC_PB1AP@h |
| ori r3,r3,CONFIG_SYS_EBC_PB1AP@l |
| mtdcr EBC0_CFGDATA,r3 |
| li r3,PB1CR |
| mtdcr EBC0_CFGADDR,r3 |
| lis r3,CONFIG_SYS_EBC_PB1CR@h |
| ori r3,r3,CONFIG_SYS_EBC_PB1CR@l |
| mtdcr EBC0_CFGDATA,r3 |
| |
| li r3,PB4AP /* program EBC bank 4 for FPGA access */ |
| mtdcr EBC0_CFGADDR,r3 |
| lis r3,CONFIG_SYS_EBC_PB4AP@h |
| ori r3,r3,CONFIG_SYS_EBC_PB4AP@l |
| mtdcr EBC0_CFGDATA,r3 |
| li r3,PB4CR |
| mtdcr EBC0_CFGADDR,r3 |
| lis r3,CONFIG_SYS_EBC_PB4CR@h |
| ori r3,r3,CONFIG_SYS_EBC_PB4CR@l |
| mtdcr EBC0_CFGDATA,r3 |
| #endif |
| |
| /* |
| !----------------------------------------------------------------------- |
| ! Check to see if chip is in bypass mode. |
| ! If so, write stored CPC0_PLLMR0 and CPC0_PLLMR1 values and perform a |
| ! CPU reset Otherwise, skip this step and keep going. |
| ! Note: Running BIOS in bypass mode is not supported since PLB speed |
| ! will not be fast enough for the SDRAM (min 66MHz) |
| !----------------------------------------------------------------------- |
| */ |
| mfdcr r5, CPC0_PLLMR1 |
| rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */ |
| cmpi cr0,0,r4,0x1 |
| |
| beq pll_done /* if SSCS =b'1' then PLL has */ |
| /* already been set */ |
| /* and CPU has been reset */ |
| /* so skip to next section */ |
| |
| #ifdef CONFIG_BUBINGA |
| /* |
| !----------------------------------------------------------------------- |
| ! Read NVRAM to get value to write in PLLMR. |
| ! If value has not been correctly saved, write default value |
| ! Default config values (assuming on-board 33MHz SYS_CLK) are above. |
| ! See CPU_DEFAULT_200 and CPU_DEFAULT_266 above. |
| ! |
| ! WARNING: This code assumes the first three words in the nvram_t |
| ! structure in openbios.h. Changing the beginning of |
| ! the structure will break this code. |
| ! |
| !----------------------------------------------------------------------- |
| */ |
| addis r3,0,NVRAM_BASE@h |
| addi r3,r3,NVRAM_BASE@l |
| |
| lwz r4, 0(r3) |
| addis r5,0,NVRVFY1@h |
| addi r5,r5,NVRVFY1@l |
| cmp cr0,0,r4,r5 /* Compare 1st NVRAM Magic number*/ |
| bne ..no_pllset |
| addi r3,r3,4 |
| lwz r4, 0(r3) |
| addis r5,0,NVRVFY2@h |
| addi r5,r5,NVRVFY2@l |
| cmp cr0,0,r4,r5 /* Compare 2 NVRAM Magic number */ |
| bne ..no_pllset |
| addi r3,r3,8 /* Skip over conf_size */ |
| lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */ |
| lwz r3, 0(r3) /* Load PLLMR0 value from NVRAM */ |
| rlwinm r5,r4,1,0x1 /* get system clock source (SSCS) */ |
| cmpi cr0,0,r5,1 /* See if PLL is locked */ |
| beq pll_write |
| ..no_pllset: |
| #endif /* CONFIG_BUBINGA */ |
| |
| addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */ |
| ori r3,r3,PLLMR0_DEFAULT@l /* */ |
| addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */ |
| ori r4,r4,PLLMR1_DEFAULT@l /* */ |
| |
| 1: |
| b pll_write /* Write the CPC0_PLLMR with new value */ |
| |
| pll_done: |
| /* |
| !----------------------------------------------------------------------- |
| ! Clear Soft Reset Register |
| ! This is needed to enable PCI if not booting from serial EPROM |
| !----------------------------------------------------------------------- |
| */ |
| addi r3, 0, 0x0 |
| mtdcr CPC0_SRR, r3 |
| |
| addis r3,0,0x0010 |
| mtctr r3 |
| pci_wait: |
| bdnz pci_wait |
| |
| blr /* return to main code */ |
| |
| /* |
| !----------------------------------------------------------------------------- |
| ! Function: pll_write |
| ! Description: Updates the value of the CPC0_PLLMR according to CMOS27E documentation |
| ! That is: |
| ! 1. Pll is first disabled (de-activated by putting in bypass mode) |
| ! 2. PLL is reset |
| ! 3. Clock dividers are set while PLL is held in reset and bypassed |
| ! 4. PLL Reset is cleared |
| ! 5. Wait 100us for PLL to lock |
| ! 6. A core reset is performed |
| ! Input: r3 = Value to write to CPC0_PLLMR0 |
| ! Input: r4 = Value to write to CPC0_PLLMR1 |
| ! Output r3 = none |
| !----------------------------------------------------------------------------- |
| */ |
| .globl pll_write |
| pll_write: |
| mfdcr r5, CPC0_UCR |
| andis. r5,r5,0xFFFF |
| ori r5,r5,0x0101 /* Stop the UART clocks */ |
| mtdcr CPC0_UCR,r5 /* Before changing PLL */ |
| |
| mfdcr r5, CPC0_PLLMR1 |
| rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */ |
| mtdcr CPC0_PLLMR1,r5 |
| oris r5,r5,0x4000 /* Set PLL Reset */ |
| mtdcr CPC0_PLLMR1,r5 |
| |
| mtdcr CPC0_PLLMR0,r3 /* Set clock dividers */ |
| rlwinm r5,r4,0,0x3FFFFFFF /* Reset & Bypass new PLL dividers */ |
| oris r5,r5,0x4000 /* Set PLL Reset */ |
| mtdcr CPC0_PLLMR1,r5 /* Set clock dividers */ |
| rlwinm r5,r5,0,0xBFFFFFFF /* Clear PLL Reset */ |
| mtdcr CPC0_PLLMR1,r5 |
| |
| /* |
| ! Wait min of 100us for PLL to lock. |
| ! See CMOS 27E databook for more info. |
| ! At 200MHz, that means waiting 20,000 instructions |
| */ |
| addi r3,0,20000 /* 2000 = 0x4e20 */ |
| mtctr r3 |
| pll_wait: |
| bdnz pll_wait |
| |
| oris r5,r5,0x8000 /* Enable PLL */ |
| mtdcr CPC0_PLLMR1,r5 /* Engage */ |
| |
| /* |
| * Reset CPU to guarantee timings are OK |
| * Not sure if this is needed... |
| */ |
| addis r3,0,0x1000 |
| mtspr SPRN_DBCR0,r3 /* This will cause a CPU core reset, and */ |
| /* execution will continue from the poweron */ |
| /* vector of 0xfffffffc */ |
| #endif /* CONFIG_405EP */ |
| |
| #if defined(CONFIG_440) |
| /*----------------------------------------------------------------------------+ |
| | mttlb3. |
| +----------------------------------------------------------------------------*/ |
| function_prolog(mttlb3) |
| TLBWE(4,3,2) |
| blr |
| function_epilog(mttlb3) |
| |
| /*----------------------------------------------------------------------------+ |
| | mftlb3. |
| +----------------------------------------------------------------------------*/ |
| function_prolog(mftlb3) |
| TLBRE(3,3,2) |
| blr |
| function_epilog(mftlb3) |
| |
| /*----------------------------------------------------------------------------+ |
| | mttlb2. |
| +----------------------------------------------------------------------------*/ |
| function_prolog(mttlb2) |
| TLBWE(4,3,1) |
| blr |
| function_epilog(mttlb2) |
| |
| /*----------------------------------------------------------------------------+ |
| | mftlb2. |
| +----------------------------------------------------------------------------*/ |
| function_prolog(mftlb2) |
| TLBRE(3,3,1) |
| blr |
| function_epilog(mftlb2) |
| |
| /*----------------------------------------------------------------------------+ |
| | mttlb1. |
| +----------------------------------------------------------------------------*/ |
| function_prolog(mttlb1) |
| TLBWE(4,3,0) |
| blr |
| function_epilog(mttlb1) |
| |
| /*----------------------------------------------------------------------------+ |
| | mftlb1. |
| +----------------------------------------------------------------------------*/ |
| function_prolog(mftlb1) |
| TLBRE(3,3,0) |
| blr |
| function_epilog(mftlb1) |
| #endif /* CONFIG_440 */ |