/*
- * 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
#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 */
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
-
- /* 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
+ bl early_bats
- /* 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.
GET_GOT /* initialize GOT access */
+ /* setup the rest of the bats */
+ bl setup_bats
+ bl clear_tlbs
+ sync
+
+#if (CFG_CCSRBAR_DEFAULT != CFG_CCSRBAR)
+ /* setup ccsrbar */
+ bl setup_ccsrbar
+#endif
+
/* run low-level CPU init code (from Flash) */
bl cpu_init_f
sync
#ifdef RUN_DIAG
- /* Sri: Code to run the diagnostic automatically */
-
/* Load PX_AUX register address in r4 */
lis r4, 0xf810
ori r4, r4, 0x6
.globl invalidate_bats
invalidate_bats:
+ li r0, 0
/* invalidate BATs */
mtspr IBAT0U, r0
mtspr IBAT1U, r0
/* setup_bats - set them up to some initial state */
+ /* Skip any BATS setup in early_bats */
.globl setup_bats
setup_bats:
mtspr DBAT4U, r3
isync
- /* IBAT 5 */
- addis r4, r0, CFG_IBAT5L@h
- ori r4, r4, CFG_IBAT5L@l
- addis r3, r0, CFG_IBAT5U@h
- ori r3, r3, CFG_IBAT5U@l
- mtspr IBAT5L, r4
- mtspr IBAT5U, r3
- isync
-
- /* DBAT 5 */
- addis r4, r0, CFG_DBAT5L@h
- ori r4, r4, CFG_DBAT5L@l
- addis r3, r0, CFG_DBAT5U@h
- ori r3, r3, CFG_DBAT5U@l
- mtspr DBAT5L, r4
- mtspr DBAT5U, r3
- isync
-
- /* IBAT 6 */
- addis r4, r0, CFG_IBAT6L@h
- ori r4, r4, CFG_IBAT6L@l
- addis r3, r0, CFG_IBAT6U@h
- ori r3, r3, CFG_IBAT6U@l
- mtspr IBAT6L, r4
- mtspr IBAT6U, r3
- isync
-
- /* DBAT 6 */
- addis r4, r0, CFG_DBAT6L@h
- ori r4, r4, CFG_DBAT6L@l
- addis r3, r0, CFG_DBAT6U@h
- ori r3, r3, CFG_DBAT6U@l
- mtspr DBAT6L, r4
- mtspr DBAT6U, r3
- isync
-
/* IBAT 7 */
addis r4, r0, CFG_IBAT7L@h
ori r4, r4, CFG_IBAT7L@l
mtspr DBAT7U, r3
isync
-1:
- addis r3, 0, 0x0000
- addis r5, 0, 0x4 /* upper bound of 0x00040000 for 7400/750 */
+ 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 */
+ lis r4, CFG_IBAT5L@h
+ ori r4, r4, CFG_IBAT5L@l
+ lis r3, CFG_IBAT5U@h
+ ori r3, r3, CFG_IBAT5U@l
+ mtspr IBAT5L, r4
+ mtspr IBAT5U, r3
+ isync
+
+ /* DBAT 5 */
+ lis r4, CFG_DBAT5L@h
+ ori r4, r4, CFG_DBAT5L@l
+ lis r3, CFG_DBAT5U@h
+ ori r3, r3, CFG_DBAT5U@l
+ mtspr DBAT5L, r4
+ mtspr DBAT5U, r3
+ isync
+
+ /* IBAT 6 */
+ lis r4, CFG_IBAT6L@h
+ ori r4, r4, CFG_IBAT6L@l
+ lis r3, CFG_IBAT6U@h
+ ori r3, r3, CFG_IBAT6U@l
+ mtspr IBAT6L, r4
+ mtspr IBAT6U, r3
+ isync
+
+ /* DBAT 6 */
+ lis r4, CFG_DBAT6L@h
+ ori r4, r4, CFG_DBAT6L@l
+ lis r3, CFG_DBAT6U@h
+ ori r3, r3, CFG_DBAT6U@l
+ mtspr DBAT6L, r4
+ mtspr DBAT6U, r3
isync
+ blr
+ .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
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)
*
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 */
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 */
sync
isync
- /*SYNCBE|ABE in HID1*/
+ /* MCP|SYNCBE|ABE in HID1 */
mfspr r4, HID1
+ oris r4, r4, 0x8000
ori r4, r4, 0x0C00
mtspr HID1, r4
sync
projects / oweals / u-boot.git / blobdiff