* Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
* Copyright (C) 2000, 2001,2002 Wolfgang Denk <wd@denx.de>
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
/*
* U-Boot - Startup Code for MPC8260 PowerPC based Embedded Boards
*/
+#include <asm-offsets.h>
#include <config.h>
#include <mpc8260.h>
-#include <timestamp.h>
#include <version.h>
-#define CONFIG_8260 1 /* needed for Linux kernel header files */
-#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
-
#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
+#include <asm/u-boot.h>
/* We don't want the MMU yet.
*/
GOT_ENTRY(transfer_to_handler)
GOT_ENTRY(__init_end)
- GOT_ENTRY(_end)
+ GOT_ENTRY(__bss_end)
GOT_ENTRY(__bss_start)
-#if defined(CONFIG_HYMOD)
- GOT_ENTRY(environment)
-#endif
END_GOT
/*
.data
.globl version_string
version_string:
- .ascii U_BOOT_VERSION
- .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
- .ascii CONFIG_IDENT_STRING, "\0"
+ .ascii U_BOOT_VERSION_STRING, "\0"
/*
* Hard Reset Configuration Word (HRCW) table
.globl _start
_start:
- li r21, BOOTFLAG_COLD /* Normal Power-On: Boot from FLASH*/
- nop
- b boot_cold
-
- . = EXC_OFF_SYS_RESET + 0x10
-
- .globl _start_warm
-_start_warm:
- li r21, BOOTFLAG_WARM /* Software reboot */
- b boot_warm
-
-boot_cold:
-#if defined(CONFIG_MPC8260ADS) && defined(CONFIG_SYS_DEFAULT_IMMR)
- lis r3, CONFIG_SYS_DEFAULT_IMMR@h
- nop
- lwz r4, 0(r3)
- nop
- rlwinm r4, r4, 0, 8, 5
- nop
- oris r4, r4, 0x0200
- nop
- stw r4, 0(r3)
- nop
-#endif /* CONFIG_MPC8260ADS && CONFIG_SYS_DEFAULT_IMMR */
-boot_warm:
mfmsr r5 /* save msr contents */
-#if defined(CONFIG_COGENT)
- /* this is what the cogent EPROM does */
- li r0, 0
- mtmsr r0
- isync
- bl cogent_init_8260
-#endif /* CONFIG_COGENT */
-
#if defined(CONFIG_SYS_DEFAULT_IMMR)
lis r3, CONFIG_SYS_IMMR@h
ori r3, r3, CONFIG_SYS_IMMR@l
bl init_debug /* set up debugging stuff */
#endif
- mr r3, r21
- /* r3: BOOTFLAG */
bl board_init_f /* run 1st part of board init code (in Flash)*/
+ /* NOTREACHED - board_init_f() does not return */
+
/*
* Vector Table
*/
SYNC
rfi
-#if defined(CONFIG_COGENT)
-
-/*
- * This code initialises the MPC8260 processor core
- * (conforms to PowerPC 603e spec)
- */
-
- .globl cogent_init_8260
-cogent_init_8260:
-
- /* Taken from page 14 of CMA282 manual */
- /*--------------------------------------------------------------*/
-
- lis r4, (CONFIG_SYS_IMMR+IM_REGBASE)@h
- lis r3, CONFIG_SYS_IMMR@h
- stw r3, IM_IMMR@l(r4)
- lwz r3, IM_IMMR@l(r4)
- stw r3, 0(r0)
- lis r3, CONFIG_SYS_SYPCR@h
- ori r3, r3, CONFIG_SYS_SYPCR@l
- stw r3, IM_SYPCR@l(r4)
- lwz r3, IM_SYPCR@l(r4)
- stw r3, 4(r0)
- lis r3, CONFIG_SYS_SCCR@h
- ori r3, r3, CONFIG_SYS_SCCR@l
- stw r3, IM_SCCR@l(r4)
- lwz r3, IM_SCCR@l(r4)
- stw r3, 8(r0)
-
- /* the rest of this was disassembled from the */
- /* EPROM code that came with my CMA282 CPU module */
- /*--------------------------------------------------------------*/
-
- lis r1, 0x1234
- ori r1, r1, 0x5678
- stw r1, 0x20(r0)
- lwz r1, 0x20(r0)
- stw r1, 0x24(r0)
- lwz r1, 0x24(r0)
- lis r3, 0x0e80
- ori r3, r3, 0
- stw r1, 4(r3)
- lwz r1, 4(r3)
-
- /* Done! */
- /*--------------------------------------------------------------*/
-
- blr
-
-#endif /* CONFIG_COGENT */
-
/*
* This code initialises the MPC8260 processor core
* (conforms to PowerPC 603e spec)
/*--------------------------------------------------------------*/
lis r3, (CONFIG_SYS_IMMR+IM_REGBASE)@h
-#if !defined(CONFIG_COGENT)
lis r4, CONFIG_SYS_SYPCR@h
ori r4, r4, CONFIG_SYS_SYPCR@l
stw r4, IM_SYPCR@l(r3)
-#endif /* !CONFIG_COGENT */
#if defined(CONFIG_WATCHDOG)
li r4, 21868 /* = 0x556c */
sth r4, IM_SWSR@l(r3)
beq 4f
3: lwzu r4,4(r3)
lwzux r0,r4,r11
+ cmpwi r0,0
add r0,r0,r11
- stw r10,0(r3)
+ stw r4,0(r3)
+ beq- 5f
stw r0,0(r4)
- bdnz 3b
+5: bdnz 3b
4:
clear_bss:
/*
* Now clear BSS segment
*/
lwz r3,GOT(__bss_start)
-#if defined(CONFIG_HYMOD)
- /*
- * For HYMOD - the environment is the very last item in flash.
- * The real .bss stops just before environment starts, so only
- * clear up to that point.
- *
- * taken from mods for FADS board
- */
- lwz r4,GOT(environment)
-#else
- lwz r4,GOT(_end)
-#endif
+ lwz r4,GOT(__bss_end)
cmplw 0, r3, r4
beq 6f
projects / platform / kernel / u-boot.git / blobdiff