* 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 2004 Freescale Semiconductor, Inc.
+ * Copyright Freescale Semiconductor, Inc. 2004, 2006. All rights reserved.
*
* See file CREDITS for list of people who contributed to this
* project.
END_GOT
/*
- * Version string - must be in data segment because MPC83xx uses the
- * first 256 bytes for the Hard Reset Configuration Word table (see
- * below). Similarly, can't have the U-Boot Magic Number as the first
- * thing in the image - don't know how this will affect the image tools,
- * but I guess I'll find out soon.
+ * The Hard Reset Configuration Word (HRCW) table is in the first 64
+ * (0x40) bytes of flash. It has 8 bytes, but each byte is repeated 8
+ * times so the processor can fetch it out of flash whether the flash
+ * is 8, 16, 32, or 64 bits wide (hardware trickery).
*/
- .data
- .globl version_string
-version_string:
- .ascii U_BOOT_VERSION
- .ascii " (", __DATE__, " - ", __TIME__, ")"
- .ascii " ", CONFIG_IDENT_STRING, "\0"
-
.text
#define _HRCW_TABLE_ENTRY(w) \
.fill 8,1,(((w)>>24)&0xff); \
_HRCW_TABLE_ENTRY(CFG_HRCW_LOW)
_HRCW_TABLE_ENTRY(CFG_HRCW_HIGH)
+/*
+ * Magic number and version string - put it after the HRCW since it
+ * cannot be first in flash like it is in many other processors.
+ */
+ .long 0x27051956 /* U-Boot Magic Number */
+
+ .globl version_string
+version_string:
+ .ascii U_BOOT_VERSION
+ .ascii " (", __DATE__, " - ", __TIME__, ")"
+ .ascii " ", CONFIG_IDENT_STRING, "\0"
+
#ifndef CONFIG_DEFAULT_IMMR
#error CONFIG_DEFAULT_IMMR must be defined
#endif /* CFG_DEFAULT_IMMR */
-#ifndef CFG_IMMRBAR
-#define CFG_IMMRBAR CONFIG_DEFAULT_IMMR
-#endif /* CFG_IMMRBAR */
+#ifndef CFG_IMMR
+#define CFG_IMMR CONFIG_DEFAULT_IMMR
+#endif /* CFG_IMMR */
/*
* After configuration, a system reset exception is executed using the
nop
boot_warm: /* time t 5 */
mfmsr r5 /* save msr contents */
- lis r3, CFG_IMMRBAR@h
- ori r3, r3, CFG_IMMRBAR@l
+ lis r3, CFG_IMMR@h
+ ori r3, r3, CFG_IMMR@l
stw r3, IMMRBAR(r4)
/* Initialise the E300 processor core */
GET_GOT /* initialize GOT access */
/* r3: IMMR */
- lis r3, CFG_IMMRBAR@h
+ lis r3, CFG_IMMR@h
/* run low-level CPU init code (in Flash)*/
bl cpu_init_f
/* 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 */
mtspr SRR1, r3 /* Make SRR1 match MSR */
- lis r3, CFG_IMMRBAR@h
+ lis r3, CFG_IMMR@h
#if defined(CONFIG_WATCHDOG)
/* Initialise the Wathcdog values and reset it (if req) */
/*------------------------------------------------------*/
li r4, 0x556C
sth r4, SWSRR@l(r3)
- li r4, 0xAA39
+ li r4, -0x55C7
sth r4, SWSRR@l(r3)
#else
/* Disable Wathcdog */
.globl icache_status
icache_status:
mfspr r3, HID0
- rlwinm r3, r3, HID0_ICE_SHIFT, 31, 31
+ rlwinm r3, r3, (31 - HID0_ICE_SHIFT + 1), 31, 31
blr
.globl dcache_enable
.globl dcache_status
dcache_status:
mfspr r3, HID0
- rlwinm r3, r3, HID0_DCE_SHIFT, 31, 31
+ rlwinm r3, r3, (31 - HID0_DCE_SHIFT + 1), 31, 31
blr
.globl get_pvr
mfspr r3, PVR
blr
+ .globl ppcDWstore
+ppcDWstore:
+ lfd 1, 0(r4)
+ stfd 1, 0(r3)
+ blr
+
+ .globl ppcDWload
+ppcDWload:
+ lfd 1, 0(r3)
+ stfd 1, 0(r4)
+ blr
+
/*-------------------------------------------------------------------*/
/*
/* When booting from ROM (Flash or EPROM), clear the */
/* Address Mask in OR0 so ROM appears everywhere */
/*----------------------------------------------------*/
- lis r3, (CFG_IMMRBAR)@h /* r3 <= CFG_IMMRBAR */
+ lis r3, (CFG_IMMR)@h /* r3 <= CFG_IMMR */
lwz r4, OR0@l(r3)
li r5, 0x7fff /* r5 <= 0x00007FFFF */
and r4, r4, r5
lis r4, (CFG_FLASH_BASE)@h
ori r4, r4, (CFG_FLASH_BASE)@l
stw r4, LBLAWBAR1(r3) /* LBLAWBAR1 <= CFG_FLASH_BASE */
- lis r4, (0x80000016)@h
- ori r4, r4, (0x80000016)@l
+
+ /* Store 0x80000012 + log2(CFG_FLASH_SIZE) into LBLAWAR1 */
+ lis r4, (0x80000012)@h
+ ori r4, r4, (0x80000012)@l
+ li r5, CFG_FLASH_SIZE
+1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */
+ addi r4, r4, 1
+ bne 1b
+
stw r4, LBLAWAR1(r3) /* LBLAWAR1 <= 8MB Flash Size */
blr
stw r5, BR0(r3) /* r5 <= (CFG_FLASH_BASE & 0xFFFF8000) | (BR0 & 0x00007FFF) */
lwz r4, OR0(r3)
- lis r5, 0xFF80 /* 8M */
+ lis r5, ~((CFG_FLASH_SIZE << 4) - 1)
or r4, r4, r5
- stw r4, OR0(r3) /* OR0 <= OR0 | 0xFF800000 */
+ stw r4, OR0(r3)
lis r4, (CFG_FLASH_BASE)@h
ori r4, r4, (CFG_FLASH_BASE)@l
stw r4, LBLAWBAR0(r3) /* LBLAWBAR0 <= CFG_FLASH_BASE */
- lis r4, (0x80000016)@h
- ori r4, r4, (0x80000016)@l
- stw r4, LBLAWAR0(r3) /* LBLAWAR0 <= 8MB Flash Size */
+ /* Store 0x80000012 + log2(CFG_FLASH_SIZE) into LBLAWAR0 */
+ lis r4, (0x80000012)@h
+ ori r4, r4, (0x80000012)@l
+ li r5, CFG_FLASH_SIZE
+1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */
+ addi r4, r4, 1
+ bne 1b
+ stw r4, LBLAWAR0(r3) /* LBLAWAR0 <= Flash Size */
+
xor r4, r4, r4
stw r4, LBLAWBAR1(r3)
projects / karo-tx-uboot.git / blobdiff