diff options
Diffstat (limited to 'cpu/ppc4xx/start.S')
| -rw-r--r-- | cpu/ppc4xx/start.S | 671 |
1 files changed, 376 insertions, 295 deletions
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S index 85660b4..a46197d 100644 --- a/cpu/ppc4xx/start.S +++ b/cpu/ppc4xx/start.S @@ -22,26 +22,27 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ -/*------------------------------------------------------------------------------+ */ -/* */ -/* This source code has been made available to you by IBM on an AS-IS */ -/* basis. Anyone receiving this source is licensed under IBM */ -/* copyrights to use it in any way he or she deems fit, including */ -/* copying it, modifying it, compiling it, and redistributing it either */ -/* with or without modifications. No license under IBM patents or */ -/* patent applications is to be implied by the copyright license. */ -/* */ -/* Any user of this software should understand that IBM cannot provide */ -/* technical support for this software and will not be responsible for */ -/* any consequences resulting from the use of this software. */ -/* */ -/* Any person who transfers this source code or any derivative work */ -/* must include the IBM copyright notice, this paragraph, and the */ -/* preceding two paragraphs in the transferred software. */ -/* */ -/* COPYRIGHT I B M CORPORATION 1995 */ -/* LICENSED MATERIAL - PROGRAM PROPERTY OF I B M */ -/*------------------------------------------------------------------------------- */ +/*------------------------------------------------------------------------------+ + * + * This source code has been made available to you by IBM on an AS-IS + * basis. Anyone receiving this source is licensed under IBM + * copyrights to use it in any way he or she deems fit, including + * copying it, modifying it, compiling it, and redistributing it either + * with or without modifications. No license under IBM patents or + * patent applications is to be implied by the copyright license. + * + * Any user of this software should understand that IBM cannot provide + * technical support for this software and will not be responsible for + * any consequences resulting from the use of this software. + * + * Any person who transfers this source code or any derivative work + * must include the IBM copyright notice, this paragraph, and the + * preceding two paragraphs in the transferred software. + * + * COPYRIGHT I B M CORPORATION 1995 + * LICENSED MATERIAL - PROGRAM PROPERTY OF I B M + *------------------------------------------------------------------------------- + */ /* U-Boot - Startup Code for AMCC 4xx PowerPC based Embedded Boards * @@ -110,6 +111,13 @@ # endif #endif /* CFG_INIT_DCACHE_CS */ +#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 @@ -148,7 +156,9 @@ * NAND U-Boot image is started from offset 0 */ .text +#if defined(CONFIG_440) bl reconfig_tlb0 +#endif GET_GOT bl cpu_init_f /* run low-level CPU init code (from Flash) */ bl board_init_f @@ -285,11 +295,13 @@ skip_debug_init: mtspr ivor7,r1 /* Floating point unavailable */ li r1,0x0c00 mtspr ivor8,r1 /* System call */ - li r1,0x1000 - mtspr ivor10,r1 /* Decrementer (PIT for 440) */ - li r1,0x1400 - mtspr ivor13,r1 /* Data TLB error */ + li r1,0x0a00 + mtspr ivor9,r1 /* Auxiliary Processor unavailable */ + li r1,0x0900 + mtspr ivor10,r1 /* Decrementer */ li r1,0x1300 + mtspr ivor13,r1 /* Data TLB error */ + li r1,0x1400 mtspr ivor14,r1 /* Instr TLB error */ li r1,0x2000 mtspr ivor15,r1 /* Debug */ @@ -388,8 +400,9 @@ rsttlb: tlbwe r0,r1,0x0000 /* Invalidate all entries (V=0)*/ 2: #if defined(CONFIG_NAND_SPL) +#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) /* - * Enable internal SRAM + * Enable internal SRAM (only on 440EPx/GRx, 440EP/GR have no OCM) */ lis r2,0x7fff ori r2,r2,0xffff @@ -399,6 +412,45 @@ rsttlb: tlbwe r0,r1,0x0000 /* Invalidate all entries (V=0)*/ mfdcr r1,isram0_pmeg and r1,r1,r2 /* Disable pwr mgmt */ mtdcr isram0_pmeg,r1 +#endif +#if defined(CONFIG_440EP) + /* + * On 440EP with no internal SRAM, we setup SDRAM very early + * and copy the NAND_SPL to SDRAM and jump to it + */ + /* Clear Dcache to use as RAM */ + addis r3,r0,CFG_INIT_RAM_ADDR@h + ori r3,r3,CFG_INIT_RAM_ADDR@l + addis r4,r0,CFG_INIT_RAM_END@h + ori r4,r4,CFG_INIT_RAM_END@l + rlwinm. r5,r4,0,27,31 + rlwinm r5,r4,27,5,31 + beq ..d_ran3 + addi r5,r5,0x0001 +..d_ran3: + mtctr r5 +..d_ag3: + dcbz r0,r3 + addi r3,r3,32 + bdnz ..d_ag3 + /*----------------------------------------------------------------*/ + /* Setup the stack in internal SRAM */ + /*----------------------------------------------------------------*/ + lis r1,CFG_INIT_RAM_ADDR@h + ori r1,r1,CFG_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) */ + sync + bl early_sdram_init + sync +#endif /* CONFIG_440EP */ /* * Copy SPL from cache into internal SRAM @@ -429,7 +481,7 @@ spl_loop: start_ram: sync isync -#endif +#endif /* CONFIG_NAND_SPL */ bl 3f b _start @@ -454,11 +506,81 @@ version_string: .ascii " (", __DATE__, " - ", __TIME__, ")" .ascii CONFIG_IDENT_STRING, "\0" -/* - * Maybe this should be moved somewhere else because the current - * location (0x100) is where the CriticalInput Execption should be. - */ . = 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 + li r20,MSR_KERNEL + rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */ + lwz r6,GOT(transfer_to_handler) + mtlr r6 + blrl +.L_Alignment: + .long AlignmentException - _start + _START_OFFSET + .long int_return - _start + _START_OFFSET + +/* Program check exception */ + . = 0x700 +ProgramCheck: + EXCEPTION_PROLOG(SRR0, SRR1) + addi r3,r1,STACK_FRAME_OVERHEAD + li r20,MSR_KERNEL + rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */ + lwz r6,GOT(transfer_to_handler) + mtlr r6 + blrl +.L_ProgramCheck: + .long ProgramCheckException - _start + _START_OFFSET + .long int_return - _start + _START_OFFSET + +#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: @@ -768,21 +890,21 @@ _start: */ lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */ ori r3,r3,CFG_OCM_DATA_ADDR@l - ori r3,r3,0x8270 /* 32K Offset, 16K for Bank 1, R/W/Enable */ + ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */ mtdcr ocmplb3cr1,r3 /* Set PLB Access */ ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */ mtdcr ocmplb3cr2,r3 /* Set PLB Access */ isync - lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */ + lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */ ori r3,r3,CFG_OCM_DATA_ADDR@l - ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */ - mtdcr ocmdscr1, r3 /* Set Data Side */ - mtdcr ocmiscr1, r3 /* Set Instruction Side */ + ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */ + mtdcr ocmdscr1, r3 /* Set Data Side */ + mtdcr ocmiscr1, r3 /* Set Instruction Side */ ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */ - mtdcr ocmdscr2, r3 /* Set Data Side */ - mtdcr ocmiscr2, r3 /* Set Instruction Side */ - addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */ + mtdcr ocmdscr2, r3 /* Set Data Side */ + mtdcr ocmiscr2, r3 /* Set Instruction Side */ + addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */ mtdcr ocmdsisdpc,r3 isync @@ -801,7 +923,7 @@ _start: mtdcr ocmdscntl, r4 /* set data-side IRAM config */ isync - lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */ + lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */ ori r3,r3,CFG_OCM_DATA_ADDR@l mtdcr ocmdsarc, r3 addis r4, 0, 0xC000 /* OCM data area enabled */ @@ -810,6 +932,38 @@ _start: #endif /* CONFIG_405EZ */ #endif +#ifdef CONFIG_NAND_SPL + /* + * Copy SPL from cache into internal SRAM + */ + li r4,(CFG_NAND_BOOT_SPL_SIZE >> 2) - 1 + mtctr r4 + lis r2,CFG_NAND_BOOT_SPL_SRC@h + ori r2,r2,CFG_NAND_BOOT_SPL_SRC@l + lis r3,CFG_NAND_BOOT_SPL_DST@h + ori r3,r3,CFG_NAND_BOOT_SPL_DST@l +spl_loop: + lwzu r4,4(r2) + stwu r4,4(r3) + bdnz spl_loop + + /* + * Jump to code in RAM + */ + bl 00f +00: mflr r10 + lis r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@h + ori r3,r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@l + sub r10,r10,r3 + addi r10,r10,28 + mtlr r10 + blr + +start_ram: + sync + isync +#endif /* CONFIG_NAND_SPL */ + /*----------------------------------------------------------------------- */ /* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */ /*----------------------------------------------------------------------- */ @@ -920,119 +1074,22 @@ _start: stw r0, +12(r1) /* Save return addr (underflow vect) */ #endif /* !(CFG_INIT_DCACHE_CS || !CFG_TEM_STACK_OCM) */ +#ifdef CONFIG_NAND_SPL + bl nand_boot /* will not return */ +#else GET_GOT /* initialize GOT access */ bl cpu_init_f /* run low-level CPU init code (from Flash) */ /* NEVER RETURNS! */ bl board_init_f /* run first part of init code (from Flash) */ +#endif /* CONFIG_NAND_SPL */ #endif /* CONFIG_405GP || CONFIG_405CR || CONFIG_405 || CONFIG_405EP */ /*----------------------------------------------------------------------- */ #ifndef CONFIG_NAND_SPL -/*****************************************************************************/ - .globl _start_of_vectors -_start_of_vectors: - -#if 0 -/*TODO Fixup _start above so we can do this*/ -/* Critical input. */ - CRIT_EXCEPTION(0x100, CritcalInput, CritcalInputException) -#endif - -/* Machine check */ - CRIT_EXCEPTION(0x200, MachineCheck, MachineCheckException) - -/* 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 - mfspr r4,DAR - stw r4,_DAR(r21) - mfspr r5,DSISR - stw r5,_DSISR(r21) - addi r3,r1,STACK_FRAME_OVERHEAD - li r20,MSR_KERNEL - rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */ - lwz r6,GOT(transfer_to_handler) - mtlr r6 - blrl -.L_Alignment: - .long AlignmentException - _start + EXC_OFF_SYS_RESET - .long int_return - _start + EXC_OFF_SYS_RESET - -/* Program check exception */ - . = 0x700 -ProgramCheck: - EXCEPTION_PROLOG - addi r3,r1,STACK_FRAME_OVERHEAD - li r20,MSR_KERNEL - rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */ - lwz r6,GOT(transfer_to_handler) - mtlr r6 - blrl -.L_ProgramCheck: - .long ProgramCheckException - _start + EXC_OFF_SYS_RESET - .long int_return - _start + EXC_OFF_SYS_RESET - - /* No FPU on MPC8xx. This exception is not supposed to happen. - */ - STD_EXCEPTION(0x800, FPUnavailable, UnknownException) - - /* I guess we could implement decrementer, and may have - * to someday for timekeeping. - */ - STD_EXCEPTION(0x900, Decrementer, timer_interrupt) - STD_EXCEPTION(0xa00, Trap_0a, UnknownException) - STD_EXCEPTION(0xb00, Trap_0b, UnknownException) - STD_EXCEPTION(0xc00, SystemCall, UnknownException) - STD_EXCEPTION(0xd00, SingleStep, UnknownException) - - STD_EXCEPTION(0xe00, Trap_0e, UnknownException) - STD_EXCEPTION(0xf00, Trap_0f, UnknownException) - - /* On the MPC8xx, this is a software emulation interrupt. It occurs - * for all unimplemented and illegal instructions. - */ - STD_EXCEPTION(0x1000, PIT, PITException) - - STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException) - STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException) - STD_EXCEPTION(0x1300, InstructionTLBError, UnknownException) - STD_EXCEPTION(0x1400, DataTLBError, UnknownException) - - STD_EXCEPTION(0x1500, Reserved5, UnknownException) - STD_EXCEPTION(0x1600, Reserved6, UnknownException) - STD_EXCEPTION(0x1700, Reserved7, UnknownException) - STD_EXCEPTION(0x1800, Reserved8, UnknownException) - STD_EXCEPTION(0x1900, Reserved9, UnknownException) - STD_EXCEPTION(0x1a00, ReservedA, UnknownException) - STD_EXCEPTION(0x1b00, ReservedB, UnknownException) - - STD_EXCEPTION(0x1c00, DataBreakpoint, UnknownException) - STD_EXCEPTION(0x1d00, InstructionBreakpoint, UnknownException) - STD_EXCEPTION(0x1e00, PeripheralBreakpoint, UnknownException) - STD_EXCEPTION(0x1f00, DevPortBreakpoint, UnknownException) - - CRIT_EXCEPTION(0x2000, DebugBreakpoint, DebugException ) - - .globl _end_of_vectors -_end_of_vectors: - - - . = 0x2100 - /* * This code finishes saving the registers to the exception frame * and jumps to the appropriate handler for the exception. @@ -1048,28 +1105,12 @@ transfer_to_handler: SAVE_4GPRS(8, r21) SAVE_8GPRS(12, r21) SAVE_8GPRS(24, r21) -#if 0 - andi. r23,r23,MSR_PR - mfspr r23,SPRG3 /* if from user, fix up tss.regs */ - beq 2f - addi r24,r1,STACK_FRAME_OVERHEAD - stw r24,PT_REGS(r23) -2: addi r2,r23,-TSS /* set r2 to current */ - tovirt(r2,r2,r23) -#endif 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 */ -#if 0 - addi r24,r2,TASK_STRUCT_SIZE /* check for kernel stack overflow */ - cmplw 0,r1,r2 - cmplw 1,r1,r24 - crand 1,1,4 - bgt stack_ovf /* if r2 < r1 < r2+TASK_STRUCT_SIZE */ -#endif lwz r24,0(r23) /* virtual address of handler */ lwz r23,4(r23) /* where to go when done */ mtspr SRR0,r24 @@ -1130,34 +1171,64 @@ crit_return: REST_GPR(31, r1) lwz r2,_NIP(r1) /* Restore environment */ lwz r0,_MSR(r1) - mtspr 990,r2 /* SRR2 */ - mtspr 991,r0 /* SRR3 */ + mtspr csrr0,r2 + mtspr csrr1,r0 lwz r0,GPR0(r1) lwz r2,GPR2(r1) lwz r1,GPR1(r1) SYNC rfci -#endif /* CONFIG_NAND_SPL */ -/* Cache functions. -*/ -invalidate_icache: - iccci r0,r0 /* for 405, iccci invalidates the */ - blr /* entire I cache */ +#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 mcsrr0,r2 + mtspr mcsrr1,r0 + lwz r0,GPR0(r1) + lwz r2,GPR2(r1) + lwz r1,GPR1(r1) + SYNC + rfmci +#endif /* CONFIG_440 */ -invalidate_dcache: - addi r6,0,0x0000 /* clear GPR 6 */ - /* Do loop for # of dcache congruence classes. */ - lis r7, (CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@ha /* TBS for large sized cache */ - ori r7, r7, (CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@l - /* NOTE: dccci invalidates both */ - mtctr r7 /* ways in the D cache */ -..dcloop: - dccci 0,r6 /* invalidate line */ - addi r6,r6, CFG_CACHELINE_SIZE /* bump to next line */ - bdnz ..dcloop + +/* + * Cache functions. + * + * NOTE: currently the 440s run with dcache _disabled_ once relocated to DRAM, + * although for some cache-ralated calls stubs have to be provided to satisfy + * symbols resolution. + * + */ +#ifdef CONFIG_440 + .globl dcache_disable +dcache_disable: blr + .globl dcache_status +dcache_status: + blr +#else flush_dcache: addis r9,r0,0x0002 /* set mask for EE and CE msr bits */ ori r9,r9,0x8000 @@ -1236,42 +1307,13 @@ dcache_status: mfdccr r3 srwi r3, r3, 31 /* >>31 => select bit 0 */ blr +#endif .globl get_pvr get_pvr: mfspr r3, PVR blr -#if !defined(CONFIG_440) - .globl wr_pit -wr_pit: - mtspr pit, r3 - blr -#endif - - .globl wr_tcr -wr_tcr: - mtspr tcr, r3 - blr - -/*------------------------------------------------------------------------------- */ -/* 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: out16 */ /* Description: Output 16 bits */ @@ -1291,15 +1333,6 @@ out16r: blr /*------------------------------------------------------------------------------- */ -/* Function: out32 */ -/* Description: Output 32 bits */ -/*------------------------------------------------------------------------------- */ - .globl out32 -out32: - stw r4,0x0000(r3) - blr - -/*------------------------------------------------------------------------------- */ /* Function: out32r */ /* Description: Byte reverse and output 32 bits */ /*------------------------------------------------------------------------------- */ @@ -1327,15 +1360,6 @@ in16r: blr /*------------------------------------------------------------------------------- */ -/* Function: in32 */ -/* Description: Input 32 bits */ -/*------------------------------------------------------------------------------- */ - .globl in32 -in32: - lwz 3,0x0000(3) - blr - -/*------------------------------------------------------------------------------- */ /* Function: in32r */ /* Description: Input 32 bits and byte reverse */ /*------------------------------------------------------------------------------- */ @@ -1377,9 +1401,6 @@ ppcSync: sync blr -/*------------------------------------------------------------------------------*/ - -#ifndef CONFIG_NAND_SPL /* * void relocate_code (addr_sp, gd, addr_moni) * @@ -1490,7 +1511,7 @@ relocate_code: * initialization, now running from RAM. */ - addi r0, r10, in_ram - _start + EXC_OFF_SYS_RESET + addi r0, r10, in_ram - _start + _START_OFFSET mtlr r0 blr /* NEVER RETURNS! */ @@ -1560,7 +1581,7 @@ clear_bss: */ .globl trap_init trap_init: - lwz r7, GOT(_start) + lwz r7, GOT(_start_of_vectors) lwz r8, GOT(_end_of_vectors) li r9, 0x100 /* reset vector always at 0x100 */ @@ -1580,35 +1601,48 @@ trap_init: /* * relocate `hdlr' and `int_return' entries */ - li r7, .L_MachineCheck - _start + EXC_OFF_SYS_RESET - li r8, Alignment - _start + EXC_OFF_SYS_RESET + li r7, .L_MachineCheck - _start + _START_OFFSET + li r8, Alignment - _start + _START_OFFSET 2: bl trap_reloc - addi r7, r7, 0x100 /* next exception vector */ + addi r7, r7, 0x100 /* next exception vector */ cmplw 0, r7, r8 blt 2b - li r7, .L_Alignment - _start + EXC_OFF_SYS_RESET + li r7, .L_Alignment - _start + _START_OFFSET bl trap_reloc - li r7, .L_ProgramCheck - _start + EXC_OFF_SYS_RESET + li r7, .L_ProgramCheck - _start + _START_OFFSET bl trap_reloc - li r7, .L_FPUnavailable - _start + EXC_OFF_SYS_RESET - li r8, SystemCall - _start + EXC_OFF_SYS_RESET -3: +#ifdef CONFIG_440 + li r7, .L_FPUnavailable - _start + _START_OFFSET bl trap_reloc - addi r7, r7, 0x100 /* next exception vector */ - cmplw 0, r7, r8 - blt 3b - li r7, .L_SingleStep - _start + EXC_OFF_SYS_RESET - li r8, _end_of_vectors - _start + EXC_OFF_SYS_RESET -4: + 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 - addi r7, r7, 0x100 /* next exception vector */ - cmplw 0, r7, r8 - blt 4b #if !defined(CONFIG_440) addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */ @@ -1644,8 +1678,105 @@ trap_reloc: stw r0, 4(r7) blr + +#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) + +/*----------------------------------------------------------------------------+ +| dflush. Assume 32K at vector address is cachable. ++----------------------------------------------------------------------------*/ + function_prolog(dflush) + mfmsr r9 + rlwinm r8,r9,0,15,13 + rlwinm r8,r8,0,17,15 + mtmsr r8 + addi r3,r0,0x0000 + mtspr dvlim,r3 + mfspr r3,ivpr + addi r4,r0,1024 + mtctr r4 +..dflush_loop: + lwz r6,0x0(r3) + addi r3,r3,32 + bdnz ..dflush_loop + addi r3,r3,-32 + mtctr r4 +..ag: dcbf r0,r3 + addi r3,r3,-32 + bdnz ..ag + sync + mtmsr r9 + blr + function_epilog(dflush) +#endif /* CONFIG_440 */ #endif /* CONFIG_NAND_SPL */ +/*------------------------------------------------------------------------------- */ +/* 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 + +invalidate_icache: + iccci r0,r0 /* for 405, iccci invalidates the */ + blr /* entire I cache */ + +invalidate_dcache: + addi r6,0,0x0000 /* clear GPR 6 */ + /* Do loop for # of dcache congruence classes. */ + lis r7, (CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@ha /* TBS for large sized cache */ + ori r7, r7, (CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@l + /* NOTE: dccci invalidates both */ + mtctr r7 /* ways in the D cache */ +..dcloop: + dccci 0,r6 /* invalidate line */ + addi r6,r6, CFG_CACHELINE_SIZE /* bump to next line */ + bdnz ..dcloop + blr /**************************************************************************/ /* PPC405EP specific stuff */ @@ -1892,13 +2023,6 @@ pll_wait: #endif /* CONFIG_405EP */ #if defined(CONFIG_440) -#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 - /*----------------------------------------------------------------------------+ | mttlb3. +----------------------------------------------------------------------------*/ @@ -1946,47 +2070,4 @@ pll_wait: TLBRE(3,3,0) blr function_epilog(mftlb1) - -/*----------------------------------------------------------------------------+ -| 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) - -/*----------------------------------------------------------------------------+ -| dflush. Assume 32K at vector address is cachable. -+----------------------------------------------------------------------------*/ - function_prolog(dflush) - mfmsr r9 - rlwinm r8,r9,0,15,13 - rlwinm r8,r8,0,17,15 - mtmsr r8 - addi r3,r0,0x0000 - mtspr dvlim,r3 - mfspr r3,ivpr - addi r4,r0,1024 - mtctr r4 -..dflush_loop: - lwz r6,0x0(r3) - addi r3,r3,32 - bdnz ..dflush_loop - addi r3,r3,-32 - mtctr r4 -..ag: dcbf r0,r3 - addi r3,r3,-32 - bdnz ..ag - sync - mtmsr r9 - blr - function_epilog(dflush) #endif /* CONFIG_440 */ |