summaryrefslogtreecommitdiff
path: root/cpu/mpc86xx/start.S
diff options
context:
space:
mode:
authorPeter Tyser <ptyser@xes-inc.com>2010-04-12 22:28:09 -0500
committerWolfgang Denk <wd@denx.de>2010-04-13 09:13:16 +0200
commit8d1f268204b07e172f3cb5cee0a3974d605b0b98 (patch)
treec3359e920cc886e7060fb099bf933496aca37153 /cpu/mpc86xx/start.S
parent819833af39a91fa1c1e8252862bbda6f5a602f7b (diff)
downloadu-boot-imx-8d1f268204b07e172f3cb5cee0a3974d605b0b98.zip
u-boot-imx-8d1f268204b07e172f3cb5cee0a3974d605b0b98.tar.gz
u-boot-imx-8d1f268204b07e172f3cb5cee0a3974d605b0b98.tar.bz2
ppc: Move cpu/$CPU to arch/ppc/cpu/$CPU
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'cpu/mpc86xx/start.S')
-rw-r--r--cpu/mpc86xx/start.S957
1 files changed, 0 insertions, 957 deletions
diff --git a/cpu/mpc86xx/start.S b/cpu/mpc86xx/start.S
deleted file mode 100644
index ed1e4ca..0000000
--- a/cpu/mpc86xx/start.S
+++ /dev/null
@@ -1,957 +0,0 @@
-/*
- * Copyright 2004, 2007 Freescale Semiconductor.
- * Srikanth Srinivasan <srikanth.srinivaan@freescale.com>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/* U-Boot - Startup Code for 86xx PowerPC based Embedded Boards
- *
- *
- * The processor starts at 0xfff00100 and the code is executed
- * from flash. The code is organized to be at an other address
- * in memory, but as long we don't jump around before relocating.
- * board_init lies at a quite high address and when the cpu has
- * jumped there, everything is ok.
- */
-#include <config.h>
-#include <mpc86xx.h>
-#include <timestamp.h>
-#include <version.h>
-
-#include <ppc_asm.tmpl>
-#include <ppc_defs.h>
-
-#include <asm/cache.h>
-#include <asm/mmu.h>
-
-#ifndef CONFIG_IDENT_STRING
-#define CONFIG_IDENT_STRING ""
-#endif
-
-/*
- * Need MSR_DR | MSR_IR enabled to access I/O (printf) in exceptions
- */
-
-/*
- * Set up GOT: Global Offset Table
- *
- * Use r12 to access the GOT
- */
- 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(_end)
- GOT_ENTRY(__bss_start)
- END_GOT
-
-/*
- * r3 - 1st arg to board_init(): IMMP pointer
- * r4 - 2nd arg to board_init(): boot flag
- */
- .text
- .long 0x27051956 /* U-Boot Magic Number */
- .globl version_string
-version_string:
- .ascii U_BOOT_VERSION
- .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
- .ascii CONFIG_IDENT_STRING, "\0"
-
- . = EXC_OFF_SYS_RESET
- .globl _start
-_start:
- li r21, BOOTFLAG_COLD /* Normal Power-On: Boot from FLASH */
- b boot_cold
- sync
-
- . = EXC_OFF_SYS_RESET + 0x10
-
- .globl _start_warm
-_start_warm:
- li r21, BOOTFLAG_WARM /* Software reboot */
- b boot_warm
- sync
-
- /* the boot code is located below the exception table */
-
- .globl _start_of_vectors
-_start_of_vectors:
-
-/* Machine check */
- STD_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(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)
-
- 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)
- STD_EXCEPTION(0x1000, SoftEmu, SoftEmuException)
- 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)
-
- .globl _end_of_vectors
-_end_of_vectors:
-
- . = 0x2000
-
-boot_cold:
-boot_warm:
- /*
- * NOTE: Only Cpu 0 will ever come here. Other cores go to an
- * address specified by the BPTR
- */
-1:
-#ifdef CONFIG_SYS_RAMBOOT
- /* disable everything */
- li r0, 0
- mtspr HID0, r0
- sync
- mtmsr 0
-#endif
-
- /* Invalidate BATs */
- bl invalidate_bats
- sync
- /* Invalidate all of TLB before MMU turn on */
- bl clear_tlbs
- sync
-
-#ifdef CONFIG_SYS_L2
- /* init the L2 cache */
- lis r3, L2_INIT@h
- ori r3, r3, L2_INIT@l
- mtspr l2cr, r3
- /* invalidate the L2 cache */
- bl l2cache_invalidate
- sync
-#endif
-
- /*
- * Calculate absolute address in FLASH and jump there
- *------------------------------------------------------*/
- lis r3, CONFIG_SYS_MONITOR_BASE_EARLY@h
- ori r3, r3, CONFIG_SYS_MONITOR_BASE_EARLY@l
- addi r3, r3, in_flash - _start + EXC_OFF_SYS_RESET
- mtlr r3
- blr
-
-in_flash:
- /* let the C-code set up the rest */
- /* */
- /* Be careful to keep code relocatable ! */
- /*------------------------------------------------------*/
- /* perform low-level init */
-
- /* enable extended addressing */
- bl enable_ext_addr
-
- /* setup the bats */
- bl early_bats
-
- /*
- * Cache must be enabled here for stack-in-cache trick.
- * This means we need to enable the BATS.
- * Cache should be turned on after BATs, since by default
- * everything is write-through.
- */
-
- /* enable address translation */
- mfmsr r5
- ori r5, r5, (MSR_IR | MSR_DR)
- lis r3,addr_trans_enabled@h
- ori r3, r3, addr_trans_enabled@l
- mtspr SPRN_SRR0,r3
- mtspr SPRN_SRR1,r5
- rfi
-
-addr_trans_enabled:
- /* enable and invalidate the data cache */
-/* bl l1dcache_enable */
- bl dcache_enable
- sync
-
-#if 1
- bl icache_enable
-#endif
-
-#ifdef CONFIG_SYS_INIT_RAM_LOCK
- bl lock_ram_in_cache
- sync
-#endif
-
-#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR)
- bl setup_ccsrbar
-#endif
-
- /* set up the stack pointer in our newly created
- * cache-ram (r1) */
- lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h
- ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l
-
- 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 */
-
- GET_GOT /* initialize GOT access */
-
- /* run low-level CPU init code (from Flash) */
- bl cpu_init_f
- sync
-
-#ifdef RUN_DIAG
-
- /* Load PX_AUX register address in r4 */
- lis r4, PIXIS_BASE@h
- ori r4, r4, 0x6
- /* Load contents of PX_AUX in r3 bits 24 to 31*/
- lbz r3, 0(r4)
-
- /* Mask and obtain the bit in r3 */
- rlwinm. r3, r3, 0, 24, 24
- /* If not zero, jump and continue with u-boot */
- bne diag_done
-
- /* Load back contents of PX_AUX in r3 bits 24 to 31 */
- lbz r3, 0(r4)
- /* Set the MSB of the register value */
- ori r3, r3, 0x80
- /* Write value in r3 back to PX_AUX */
- stb r3, 0(r4)
-
- /* Get the address to jump to in r3*/
- lis r3, CONFIG_SYS_DIAG_ADDR@h
- ori r3, r3, CONFIG_SYS_DIAG_ADDR@l
-
- /* Load the LR with the branch address */
- mtlr r3
-
- /* Branch to diagnostic */
- blr
-
-diag_done:
-#endif
-
-/* bl l2cache_enable */
- mr r3, r21
-
- /* r3: BOOTFLAG */
- /* run 1st part of board init code (from Flash) */
- bl board_init_f
- sync
-
- /* NOTREACHED */
-
- .globl invalidate_bats
-invalidate_bats:
-
- li r0, 0
- /* invalidate BATs */
- mtspr IBAT0U, r0
- mtspr IBAT1U, r0
- mtspr IBAT2U, r0
- mtspr IBAT3U, r0
- mtspr IBAT4U, r0
- mtspr IBAT5U, r0
- mtspr IBAT6U, r0
- mtspr IBAT7U, r0
-
- isync
- mtspr DBAT0U, r0
- mtspr DBAT1U, r0
- mtspr DBAT2U, r0
- mtspr DBAT3U, r0
- mtspr DBAT4U, r0
- mtspr DBAT5U, r0
- mtspr DBAT6U, r0
- mtspr DBAT7U, r0
-
- isync
- sync
- blr
-
-/*
- * early_bats:
- *
- * Set up bats needed early on - this is usually the BAT for the
- * stack-in-cache, the Flash, and CCSR space
- */
- .globl early_bats
-early_bats:
- /* IBAT 3 */
- lis r4, CONFIG_SYS_IBAT3L@h
- ori r4, r4, CONFIG_SYS_IBAT3L@l
- lis r3, CONFIG_SYS_IBAT3U@h
- ori r3, r3, CONFIG_SYS_IBAT3U@l
- mtspr IBAT3L, r4
- mtspr IBAT3U, r3
- isync
-
- /* DBAT 3 */
- lis r4, CONFIG_SYS_DBAT3L@h
- ori r4, r4, CONFIG_SYS_DBAT3L@l
- lis r3, CONFIG_SYS_DBAT3U@h
- ori r3, r3, CONFIG_SYS_DBAT3U@l
- mtspr DBAT3L, r4
- mtspr DBAT3U, r3
- isync
-
- /* IBAT 5 */
- lis r4, CONFIG_SYS_IBAT5L@h
- ori r4, r4, CONFIG_SYS_IBAT5L@l
- lis r3, CONFIG_SYS_IBAT5U@h
- ori r3, r3, CONFIG_SYS_IBAT5U@l
- mtspr IBAT5L, r4
- mtspr IBAT5U, r3
- isync
-
- /* DBAT 5 */
- lis r4, CONFIG_SYS_DBAT5L@h
- ori r4, r4, CONFIG_SYS_DBAT5L@l
- lis r3, CONFIG_SYS_DBAT5U@h
- ori r3, r3, CONFIG_SYS_DBAT5U@l
- mtspr DBAT5L, r4
- mtspr DBAT5U, r3
- isync
-
- /* IBAT 6 */
- lis r4, CONFIG_SYS_IBAT6L_EARLY@h
- ori r4, r4, CONFIG_SYS_IBAT6L_EARLY@l
- lis r3, CONFIG_SYS_IBAT6U_EARLY@h
- ori r3, r3, CONFIG_SYS_IBAT6U_EARLY@l
- mtspr IBAT6L, r4
- mtspr IBAT6U, r3
- isync
-
- /* DBAT 6 */
- lis r4, CONFIG_SYS_DBAT6L_EARLY@h
- ori r4, r4, CONFIG_SYS_DBAT6L_EARLY@l
- lis r3, CONFIG_SYS_DBAT6U_EARLY@h
- ori r3, r3, CONFIG_SYS_DBAT6U_EARLY@l
- mtspr DBAT6L, r4
- mtspr DBAT6U, r3
- isync
-
-#if(CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR)
- /* IBAT 7 */
- lis r4, CONFIG_SYS_CCSR_DEFAULT_IBATL@h
- ori r4, r4, CONFIG_SYS_CCSR_DEFAULT_IBATL@l
- lis r3, CONFIG_SYS_CCSR_DEFAULT_IBATU@h
- ori r3, r3, CONFIG_SYS_CCSR_DEFAULT_IBATU@l
- mtspr IBAT7L, r4
- mtspr IBAT7U, r3
- isync
-
- /* DBAT 7 */
- lis r4, CONFIG_SYS_CCSR_DEFAULT_DBATL@h
- ori r4, r4, CONFIG_SYS_CCSR_DEFAULT_DBATL@l
- lis r3, CONFIG_SYS_CCSR_DEFAULT_DBATU@h
- ori r3, r3, CONFIG_SYS_CCSR_DEFAULT_DBATU@l
- mtspr DBAT7L, r4
- mtspr DBAT7U, r3
- isync
-#endif
- blr
-
- .globl clear_tlbs
-clear_tlbs:
- addis r3, 0, 0x0000
- addis r5, 0, 0x4
- isync
-tlblp:
- tlbie r3
- sync
- addi r3, r3, 0x1000
- cmp 0, 0, r3, r5
- blt tlblp
- blr
-
- .globl disable_addr_trans
-disable_addr_trans:
- /* disable address translation */
- mflr r4
- mfmsr r3
- andi. r0, r3, (MSR_IR | MSR_DR)
- beqlr
- andc r3, r3, r0
- mtspr SRR0, r4
- mtspr SRR1, r3
- rfi
-
-/*
- * 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
-
- .globl dc_read
-dc_read:
- blr
-
- .globl get_pvr
-get_pvr:
- mfspr r3, PVR
- blr
-
- .globl get_svr
-get_svr:
- mfspr r3, SVR
- 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
- */
- .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: out32
- * Description: Output 32 bits
- */
- .globl out32
-out32:
- stw r4,0x0000(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: in32
- * Description: Input 32 bits
- */
- .globl in32
-in32:
- lwz 3,0x0000(3)
- blr
-
-/*
- * Function: in32r
- * Description: Input 32 bits and byte reverse
- */
- .globl in32r
-in32r:
- lwbrx r3,r0,r3
- blr
-
-/*
- * void relocate_code (addr_sp, gd, addr_moni)
- *
- * This "function" does not return, instead it continues in RAM
- * after relocating the monitor code.
- *
- * r3 = dest
- * r4 = src
- * r5 = length in bytes
- * r6 = cachelinesize
- */
- .globl relocate_code
-relocate_code:
-
- mr r1, r3 /* Set new stack pointer */
- mr r9, r4 /* Save copy of Global 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, CONFIG_SYS_CACHELINE_SIZE /* 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 + EXC_OFF_SYS_RESET
- mtlr r0
- blr
-
-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
- add r0,r0,r11
- stw r10,0(r3)
- stw r0,0(r4)
- bdnz 3b
-4:
-/* clear_bss: */
- /*
- * Now clear BSS segment
- */
- lwz r3,GOT(__bss_start)
- lwz r4,GOT(_end)
-
- cmplw 0, r3, r4
- beq 6f
-
- li r0, 0
-5:
- stw r0, 0(r3)
- addi r3, r3, 4
- cmplw 0, r3, r4
- bne 5b
-6:
- mr r3, r9 /* Init Date pointer */
- mr r4, r10 /* Destination Address */
- bl board_init_r
-
- /* not reached - end relocate_code */
-/*-----------------------------------------------------------------------*/
-
- /*
- * 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)
- 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 + EXC_OFF_SYS_RESET
- li r8, Alignment - _start + EXC_OFF_SYS_RESET
-2:
- bl trap_reloc
- addi r7, r7, 0x100 /* next exception vector */
- cmplw 0, r7, r8
- blt 2b
-
- li r7, .L_Alignment - _start + EXC_OFF_SYS_RESET
- bl trap_reloc
-
- li r7, .L_ProgramCheck - _start + EXC_OFF_SYS_RESET
- bl trap_reloc
-
- li r7, .L_FPUnavailable - _start + EXC_OFF_SYS_RESET
- li r8, SystemCall - _start + EXC_OFF_SYS_RESET
-3:
- 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:
- bl trap_reloc
- addi r7, r7, 0x100 /* next exception vector */
- cmplw 0, r7, r8
- blt 4b
-
- /* enable execptions from RAM vectors */
- mfmsr r7
- li r8,MSR_IP
- andc r7,r7,r8
- ori r7,r7,MSR_ME /* Enable Machine Check */
- mtmsr r7
-
- mtlr r4 /* restore link register */
- blr
-
-.globl enable_ext_addr
-enable_ext_addr:
- mfspr r0, HID0
- lis r0, (HID0_HIGH_BAT_EN | HID0_XBSEN | HID0_XAEN)@h
- ori r0, r0, (HID0_HIGH_BAT_EN | HID0_XBSEN | HID0_XAEN)@l
- mtspr HID0, r0
- sync
- isync
- blr
-
-#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR)
-.globl setup_ccsrbar
-setup_ccsrbar:
- /* Special sequence needed to update CCSRBAR itself */
- lis r4, CONFIG_SYS_CCSRBAR_DEFAULT@h
- ori r4, r4, CONFIG_SYS_CCSRBAR_DEFAULT@l
-
- lis r5, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
- ori r5, r5, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
- srwi r5,r5,12
- li r6, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
- rlwimi r5,r6,20,8,11
- stw r5, 0(r4) /* Store physical value of CCSR */
- isync
-
- lis r5, TEXT_BASE@h
- ori r5,r5,TEXT_BASE@l
- lwz r5, 0(r5)
- isync
-
- /* Use VA of CCSR to do read */
- lis r3, CONFIG_SYS_CCSRBAR@h
- lwz r5, CONFIG_SYS_CCSRBAR@l(r3)
- isync
-
- blr
-#endif
-
-#ifdef CONFIG_SYS_INIT_RAM_LOCK
-lock_ram_in_cache:
- /* Allocate Initial RAM in data cache.
- */
- lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h
- ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l
- li r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \
- (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
- mtctr r4
-1:
- dcbz r0, r3
- addi r3, r3, 32
- bdnz 1b
-#if 1
-/* Lock the data cache */
- mfspr r0, HID0
- ori r0, r0, 0x1000
- sync
- mtspr HID0, r0
- sync
- blr
-#endif
-#if 0
- /* Lock the first way of the data cache */
- mfspr r0, LDSTCR
- ori r0, r0, 0x0080
-#if defined(CONFIG_ALTIVEC)
- dssall
-#endif
- sync
- mtspr LDSTCR, r0
- sync
- isync
- blr
-#endif
-
-.globl unlock_ram_in_cache
-unlock_ram_in_cache:
- /* invalidate the INIT_RAM section */
- lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h
- ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l
- li r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \
- (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
- mtctr r4
-1: icbi r0, r3
- addi r3, r3, 32
- bdnz 1b
- sync /* Wait for all icbi to complete on bus */
- isync
-#if 1
-/* Unlock the data cache and invalidate it */
- mfspr r0, HID0
- li r3,0x1000
- andc r0,r0,r3
- li r3,0x0400
- or r0,r0,r3
- sync
- mtspr HID0, r0
- sync
- blr
-#endif
-#if 0
- /* Unlock the first way of the data cache */
- mfspr r0, LDSTCR
- li r3,0x0080
- andc r0,r0,r3
-#ifdef CONFIG_ALTIVEC
- dssall
-#endif
- sync
- mtspr LDSTCR, r0
- sync
- isync
- li r3,0x0400
- or r0,r0,r3
- sync
- mtspr HID0, r0
- sync
- blr
-#endif
-#endif