/*
- * Copyright 2004 Freescale Semiconductor.
+ * Copyright 2004, 2007 Freescale Semiconductor.
* Srikanth Srinivasan <srikanth.srinivaan@freescale.com>
*
* See file CREDITS for list of people who contributed to this
#include <asm/cache.h>
#include <asm/mmu.h>
-#ifndef CONFIG_IDENT_STRING
-#define CONFIG_IDENT_STRING ""
+#ifndef CONFIG_IDENT_STRING
+#define CONFIG_IDENT_STRING ""
#endif
-/* We don't want the MMU yet.
-*/
-#undef MSR_KERNEL
-/* Machine Check and Recoverable Interr. */
-#define MSR_KERNEL ( MSR_ME | MSR_RI )
+/*
+ * Need MSR_DR | MSR_IR enabled to access I/O (printf) in exceptions
+ */
/*
* Set up GOT: Global Offset Table
/* Alignment exception. */
. = 0x600
Alignment:
- EXCEPTION_PROLOG
+ EXCEPTION_PROLOG(SRR0, SRR1)
mfspr r4,DAR
stw r4,_DAR(r21)
mfspr r5,DSISR
/* Program check exception */
. = 0x700
ProgramCheck:
- EXCEPTION_PROLOG
+ 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 */
#if (CONFIG_NUM_CPUS > 1)
mfspr r0, MSSCR0
andi. r0, r0, 0x0020
- rlwinm r0,r0,27,31,31
- mtspr PIR, r0
+ rlwinm r0,r0,27,31,31
+ mtspr PIR, r0
beq 1f
- bl secondary_cpu_setup
+ bl secondary_cpu_setup
#endif
+1:
+#ifdef CFG_RAMBOOT
/* disable everything */
-1: li r0, 0
+ li r0, 0
mtspr HID0, r0
sync
mtmsr 0
+#endif
+
bl invalidate_bats
sync
#ifdef CFG_L2
/* init the L2 cache */
- addis r3, r0, L2_INIT@h
+ lis r3, L2_INIT@h
ori r3, r3, L2_INIT@l
mtspr l2cr, r3
/* invalidate the L2 cache */
bl enable_ext_addr
/* setup the bats */
- bl setup_bats
- sync
-
-#if (CFG_CCSRBAR_DEFAULT != CFG_CCSRBAR)
- /* setup ccsrbar */
- bl setup_ccsrbar
-#endif
+ bl early_bats
- /* Fix for SMP linux - Changing arbitration to round-robin */
- lis r3, CFG_CCSRBAR@h
- ori r3, r3, 0x1000
- xor r4, r4, r4
- li r4, 0x1000
- stw r4, 0(r3)
-
- /* setup the law entries */
- bl law_entry
- sync
-
- /* Don't use this feature due to bug in 8641D PD4 */
- /* Disable ERD_DIS */
- lis r3, CFG_CCSRBAR@h
- ori r3, r3, 0x1008
- lwz r4, 0(r3)
- oris r4, r4, 0x4000
- stw r4, 0(r3)
- sync
-
-#if (EMULATOR_RUN == 1)
- /* On the emulator we want to adjust these ASAP */
- /* otherwise things are sloooow */
- /* Setup OR0 (LALE FIX)*/
- lis r3, CFG_CCSRBAR@h
- ori r3, r3, 0x5004
- li r4, 0x0FF3
- stw r4, 0(r3)
- sync
-
- /* Setup LCRR */
- lis r3, CFG_CCSRBAR@h
- ori r3, r3, 0x50D4
- lis r4, 0x8000
- ori r4, r4, 0x0002
- stw r4, 0(r3)
- sync
-#endif
-#if 1
- /* make sure timer enabled in guts register too */
- lis r3, CFG_CCSRBAR@h
- oris r3,r3, 0xE
- ori r3,r3,0x0070
- lwz r4, 0(r3)
- lis r5,0xFFFC
- ori r5,r5,0x5FFF
- and r4,r4,r5
- stw r4,0(r3)
-#endif
/*
* Cache must be enabled here for stack-in-cache trick.
* This means we need to enable the BATS.
/* enable and invalidate the data cache */
/* bl l1dcache_enable */
- bl dcache_enable
+ bl dcache_enable
sync
#if 1
lis r1, (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET)@h
ori r1, r1, (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET)@l
- li r0, 0 /* Make room for stack frame header and */
+ 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
+ /* setup the rest of the bats */
+ bl setup_bats
+ bl clear_tlbs
sync
-#ifdef RUN_DIAG
+#if (CFG_CCSRBAR_DEFAULT != CFG_CCSRBAR)
+ /* setup ccsrbar */
+ bl setup_ccsrbar
+#endif
- /* Sri: Code to run the diagnostic automatically */
+ /* run low-level CPU init code (from Flash) */
+ bl cpu_init_f
+ sync
- /* Load PX_AUX register address in r4 */
- lis r4, 0xf810
- ori r4, r4, 0x6
- /* Load contents of PX_AUX in r3 bits 24 to 31*/
- lbz r3, 0(r4)
+#ifdef RUN_DIAG
- /* 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 PX_AUX register address in r4 */
+ lis r4, 0xf810
+ ori r4, r4, 0x6
+ /* Load contents of PX_AUX in r3 bits 24 to 31*/
+ lbz r3, 0(r4)
- /* 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)
+ /* 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
- /* Get the address to jump to in r3*/
- lis r3, CFG_DIAG_ADDR@h
- ori r3, r3, CFG_DIAG_ADDR@l
+ /* 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)
- /* Load the LR with the branch address */
- mtlr r3
+ /* Get the address to jump to in r3*/
+ lis r3, CFG_DIAG_ADDR@h
+ ori r3, r3, CFG_DIAG_ADDR@l
- /* Branch to diagnostic */
- blr
+ /* Load the LR with the branch address */
+ mtlr r3
+
+ /* Branch to diagnostic */
+ blr
diag_done:
#endif
- /* bl l2cache_enable*/
- mr r3, r21
+/* bl l2cache_enable */
+ mr r3, r21
/* r3: BOOTFLAG */
- /* run 1st part of board init code (from Flash) */
+ /* run 1st part of board init code (from Flash) */
bl board_init_f
sync
.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
+ 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
+ mtspr DBAT4U, r0
+ mtspr DBAT5U, r0
+ mtspr DBAT6U, r0
+ mtspr DBAT7U, r0
isync
sync
/* setup_bats - set them up to some initial state */
+ /* Skip any BATS setup in early_bats */
.globl setup_bats
setup_bats:
isync
/* IBAT 4 */
- addis r4, r0, CFG_IBAT4L@h
- ori r4, r4, CFG_IBAT4L@l
- addis r3, r0, CFG_IBAT4U@h
- ori r3, r3, CFG_IBAT4U@l
- mtspr IBAT4L, r4
- mtspr IBAT4U, r3
+ addis r4, r0, CFG_IBAT4L@h
+ ori r4, r4, CFG_IBAT4L@l
+ addis r3, r0, CFG_IBAT4U@h
+ ori r3, r3, CFG_IBAT4U@l
+ mtspr IBAT4L, r4
+ mtspr IBAT4U, r3
isync
/* DBAT 4 */
- addis r4, r0, CFG_DBAT4L@h
- ori r4, r4, CFG_DBAT4L@l
- addis r3, r0, CFG_DBAT4U@h
- ori r3, r3, CFG_DBAT4U@l
- mtspr DBAT4L, r4
- mtspr DBAT4U, r3
+ addis r4, r0, CFG_DBAT4L@h
+ ori r4, r4, CFG_DBAT4L@l
+ addis r3, r0, CFG_DBAT4U@h
+ ori r3, r3, CFG_DBAT4U@l
+ mtspr DBAT4L, r4
+ mtspr DBAT4U, r3
+ isync
+
+ /* IBAT 7 */
+ addis r4, r0, CFG_IBAT7L@h
+ ori r4, r4, CFG_IBAT7L@l
+ addis r3, r0, CFG_IBAT7U@h
+ ori r3, r3, CFG_IBAT7U@l
+ mtspr IBAT7L, r4
+ mtspr IBAT7U, r3
isync
+ /* DBAT 7 */
+ addis r4, r0, CFG_DBAT7L@h
+ ori r4, r4, CFG_DBAT7L@l
+ addis r3, r0, CFG_DBAT7U@h
+ ori r3, r3, CFG_DBAT7U@l
+ mtspr DBAT7L, r4
+ mtspr DBAT7U, r3
+ isync
+
+ sync
+ blr
+
+/*
+ * early_bats:
+ *
+ * Set up bats needed early on - this is usually the BAT for the
+ * stack-in-cache and the Flash
+ */
+ .globl early_bats
+early_bats:
/* IBAT 5 */
- addis r4, r0, CFG_IBAT5L@h
+ lis r4, CFG_IBAT5L@h
ori r4, r4, CFG_IBAT5L@l
- addis r3, r0, CFG_IBAT5U@h
+ lis r3, CFG_IBAT5U@h
ori r3, r3, CFG_IBAT5U@l
mtspr IBAT5L, r4
mtspr IBAT5U, r3
isync
/* DBAT 5 */
- addis r4, r0, CFG_DBAT5L@h
+ lis r4, CFG_DBAT5L@h
ori r4, r4, CFG_DBAT5L@l
- addis r3, r0, CFG_DBAT5U@h
+ lis r3, CFG_DBAT5U@h
ori r3, r3, CFG_DBAT5U@l
mtspr DBAT5L, r4
mtspr DBAT5U, r3
isync
/* IBAT 6 */
- addis r4, r0, CFG_IBAT6L@h
+ lis r4, CFG_IBAT6L@h
ori r4, r4, CFG_IBAT6L@l
- addis r3, r0, CFG_IBAT6U@h
+ lis r3, CFG_IBAT6U@h
ori r3, r3, CFG_IBAT6U@l
mtspr IBAT6L, r4
mtspr IBAT6U, r3
isync
/* DBAT 6 */
- addis r4, r0, CFG_DBAT6L@h
+ lis r4, CFG_DBAT6L@h
ori r4, r4, CFG_DBAT6L@l
- addis r3, r0, CFG_DBAT6U@h
+ lis r3, CFG_DBAT6U@h
ori r3, r3, CFG_DBAT6U@l
mtspr DBAT6L, r4
mtspr DBAT6U, r3
isync
+ blr
- /* IBAT 7 */
- addis r4, r0, CFG_IBAT7L@h
- ori r4, r4, CFG_IBAT7L@l
- addis r3, r0, CFG_IBAT7U@h
- ori r3, r3, CFG_IBAT7U@l
- mtspr IBAT7L, r4
- mtspr IBAT7U, r3
- isync
-
- /* DBAT 7 */
- addis r4, r0, CFG_DBAT7L@h
- ori r4, r4, CFG_DBAT7L@l
- addis r3, r0, CFG_DBAT7U@h
- ori r3, r3, CFG_DBAT7U@l
- mtspr DBAT7L, r4
- mtspr DBAT7U, r3
- isync
-
-1:
- addis r3, 0, 0x0000
- addis r5, 0, 0x4 /* upper bound of 0x00040000 for 7400/750 */
+ .globl clear_tlbs
+clear_tlbs:
+ addis r3, 0, 0x0000
+ addis r5, 0, 0x4
isync
-
tlblp:
- tlbie r3
+ tlbie r3
sync
- addi r3, r3, 0x1000
- cmp 0, 0, r3, r5
+ addi r3, r3, 0x1000
+ cmp 0, 0, r3, r5
blt tlblp
-
blr
.globl enable_addr_trans
/*
- * Function: in8
- * Description: Input 8 bits
+ * Function: in8
+ * Description: Input 8 bits
*/
.globl in8
in8:
blr
/*
- * Function: out8
- * Description: Output 8 bits
+ * Function: out8
+ * Description: Output 8 bits
*/
.globl out8
out8:
blr
/*
- * Function: out16
- * Description: Output 16 bits
+ * Function: out16
+ * Description: Output 16 bits
*/
.globl out16
out16:
blr
/*
- * Function: out16r
- * Description: Byte reverse and output 16 bits
+ * Function: out16r
+ * Description: Byte reverse and output 16 bits
*/
.globl out16r
out16r:
blr
/*
- * Function: out32
- * Description: Output 32 bits
+ * Function: out32
+ * Description: Output 32 bits
*/
.globl out32
out32:
blr
/*
- * Function: out32r
- * Description: Byte reverse and output 32 bits
+ * Function: out32r
+ * Description: Byte reverse and output 32 bits
*/
.globl out32r
out32r:
blr
/*
- * Function: in16
- * Description: Input 16 bits
+ * Function: in16
+ * Description: Input 16 bits
*/
.globl in16
in16:
blr
/*
- * Function: in16r
- * Description: Input 16 bits and byte reverse
+ * Function: in16r
+ * Description: Input 16 bits and byte reverse
*/
.globl in16r
in16r:
blr
/*
- * Function: in32
- * Description: Input 32 bits
+ * Function: in32
+ * Description: Input 32 bits
*/
.globl in32
in32:
blr
/*
- * Function: in32r
- * Description: Input 32 bits and byte reverse
+ * Function: in32r
+ * Description: Input 32 bits and byte reverse
*/
.globl in32r
in32r:
lwbrx r3,r0,r3
blr
-/*
- * Function: ppcDcbf
- * Description: Data Cache block flush
- * Input: r3 = effective address
- * Output: none.
- */
- .globl ppcDcbf
-ppcDcbf:
- dcbf r0,r3
- blr
-
-/*
- * Function: ppcDcbi
- * Description: Data Cache block Invalidate
- * Input: r3 = effective address
- * Output: none.
- */
- .globl ppcDcbi
-ppcDcbi:
- dcbi r0,r3
- blr
-
-/*
- * Function: ppcDcbz
- * Description: Data Cache block zero.
- * Input: r3 = effective address
- * Output: none.
- */
- .globl ppcDcbz
-ppcDcbz:
- dcbz r0,r3
- blr
-
-/*
- * Function: ppcSync
- * Description: Processor Synchronize
- * Input: none.
- * Output: none.
- */
- .globl ppcSync
-ppcSync:
- sync
- blr
-
/*
* void relocate_code (addr_sp, gd, addr_moni)
*
.globl relocate_code
relocate_code:
- mr r1, r3 /* Set new stack pointer */
+ mr r1, r3 /* Set new stack pointer */
mr r9, r4 /* Save copy of Global Data pointer */
- mr r29, r9 /* Save for DECLARE_GLOBAL_DATA_PTR */
+ mr r2, r9 /* Save for DECLARE_GLOBAL_DATA_PTR */
mr r10, r5 /* Save copy of Destination Address */
mr r3, r5 /* Destination Address */
add r4,r4,r6
cmplw r4,r5
blt 6b
-7: sync /* Wait for all icbi to complete on bus */
+7: sync /* Wait for all icbi to complete on bus */
isync
/*
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 */
.globl enable_ext_addr
enable_ext_addr:
mfspr r0, HID0
- lis r0, (HID0_HIGH_BAT_EN | HID0_XBSEN | HID0_XAEN)@h
+ 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
+ mtspr HID0, r0
sync
isync
blr
lis r4, CFG_CCSRBAR_DEFAULT@h
ori r4, r4, CFG_CCSRBAR_DEFAULT@l
- lis r5, CFG_CCSRBAR@h
- ori r5, r5, CFG_CCSRBAR@l
+ lis r5, CFG_CCSRBAR@h
+ ori r5, r5, CFG_CCSRBAR@l
srwi r6,r5,12
stw r6, 0(r4)
isync
1: icbi r0, r3
addi r3, r3, 32
bdnz 1b
- sync /* Wait for all icbi to complete on bus */
+ 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
+ mfspr r0, HID0
+ li r3,0x1000
+ andc r0,r0,r3
li r3,0x0400
or r0,r0,r3
sync
- mtspr HID0, r0
+ 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
+ mfspr r0, LDSTCR
+ li r3,0x0080
+ andc r0,r0,r3
#ifdef CONFIG_ALTIVEC
dssall
#endif
sync
- mtspr LDSTCR, r0
+ mtspr LDSTCR, r0
sync
isync
li r3,0x0400
or r0,r0,r3
sync
- mtspr HID0, r0
+ mtspr HID0, r0
sync
blr
#endif
/* If this is a multi-cpu system then we need to handle the
* 2nd cpu. The assumption is that the 2nd cpu is being
* held in boot holdoff mode until the 1st cpu unlocks it
- * from Linux. We'll do some basic cpu init and then pass
+ * from Linux. We'll do some basic cpu init and then pass
* it to the Linux Reset Vector.
- * Sri: Much of this initialization is not required. Linux
+ * Sri: Much of this initialization is not required. Linux
* rewrites the bats, and the sprs and also enables the L1 cache.
*/
#if (CONFIG_NUM_CPUS > 1)
bl dcache_enable
sync
- /* enable and invalidate the instruction cache*/
- bl icache_enable
- sync
+ /* enable and invalidate the instruction cache*/
+ bl icache_enable
+ sync
- /* TBEN in HID0 */
+ /* TBEN in HID0 */
mfspr r4, HID0
- oris r4, r4, 0x0400
- mtspr HID0, r4
- sync
- isync
-
- /*SYNCBE|ABE in HID1*/
- mfspr r4, HID1
- ori r4, r4, 0x0C00
- mtspr HID1, r4
- sync
- isync
-
- lis r3, CONFIG_LINUX_RESET_VEC@h
+ oris r4, r4, 0x0400
+ mtspr HID0, r4
+ sync
+ isync
+
+ /* MCP|SYNCBE|ABE in HID1 */
+ mfspr r4, HID1
+ oris r4, r4, 0x8000
+ ori r4, r4, 0x0C00
+ mtspr HID1, r4
+ sync
+ isync
+
+ lis r3, CONFIG_LINUX_RESET_VEC@h
ori r3, r3, CONFIG_LINUX_RESET_VEC@l
- mtlr r3
+ mtlr r3
blr
/* Never Returns, Running in Linux Now */
#endif
-
projects / oweals / u-boot.git / blobdiff