* Copyright (C) 2000, 2001,2002 Wolfgang Denk <wd@denx.de>
* Copyright Freescale Semiconductor, Inc. 2004, 2006, 2008.
*
- * 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 MPC83xx PowerPC based Embedded Boards
*/
+#include <asm-offsets.h>
#include <config.h>
#include <mpc83xx.h>
-#include <timestamp.h>
#include <version.h>
#define CONFIG_83XX 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 "MPC83XX"
-#endif
+#include <asm/u-boot.h>
/* We don't want the MMU yet.
*/
#define MSR_KERNEL (MSR_FP|MSR_ME|MSR_RI)
#endif
-#if !defined(CONFIG_NAND_SPL) && !defined(CONFIG_SYS_RAMBOOT)
+#if defined(CONFIG_NAND_SPL) || \
+ (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_INIT_MINIMAL))
+#define MINIMAL_SPL
+#endif
+
+#if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_NAND_SPL) && \
+ !defined(CONFIG_SYS_RAMBOOT)
#define CONFIG_SYS_FLASHBOOT
#endif
START_GOT
GOT_ENTRY(_GOT2_TABLE_)
GOT_ENTRY(__bss_start)
- GOT_ENTRY(_end)
+ GOT_ENTRY(__bss_end)
-#ifndef CONFIG_NAND_SPL
+#ifndef MINIMAL_SPL
GOT_ENTRY(_FIXUP_TABLE_)
GOT_ENTRY(_start)
GOT_ENTRY(_start_of_vectors)
.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"
.align 2
mtspr SRR1, r3
rfi
+ .globl get_svr
+get_svr:
+ mfspr r3, SVR
+ blr
+
.globl get_pvr
get_pvr:
mfspr r3, PVR
#ifndef CONFIG_DEFAULT_IMMR
#error CONFIG_DEFAULT_IMMR must be defined
-#endif /* CONFIG_SYS_DEFAULT_IMMR */
+#endif /* CONFIG_DEFAULT_IMMR */
#ifndef CONFIG_SYS_IMMR
#define CONFIG_SYS_IMMR CONFIG_DEFAULT_IMMR
#endif /* CONFIG_SYS_IMMR */
.globl _start
_start: /* time t 0 */
- 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: /* time t 3 */
lis r4, CONFIG_DEFAULT_IMMR@h
nop
-boot_warm: /* time t 5 */
+
mfmsr r5 /* save msr contents */
/* 83xx manuals prescribe a specific sequence for updating IMMRBAR. */
/* Initialise the E300 processor core */
/*------------------------------------------*/
-#ifdef CONFIG_NAND_SPL
+#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_MPC83XX_WAIT_FOR_NAND)) || \
+ defined(CONFIG_NAND_SPL)
/* The FCM begins execution after only the first page
* is loaded. Wait for the rest before branching
* to another flash page.
#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
+ * cache-ram; use r3 to keep the new SP for now to
+ * avoid overiding the SP it uselessly */
+ lis r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h
+ ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l
+
+ /* r4 = end of GD area */
+ addi r4, r3, GENERATED_GBL_DATA_SIZE
+ /* Zero GD area */
+ li r0, 0
+1:
+ subi r4, r4, 1
+ stb r0, 0(r4)
+ cmplw r3, r4
+ bne 1b
+
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+
+#if CONFIG_SYS_MALLOC_F_LEN + GENERATED_GBL_DATA_SIZE > CONFIG_SYS_INIT_RAM_SIZE
+#error "CONFIG_SYS_MALLOC_F_LEN too large to fit into initial RAM."
+#endif
+
+ /* r3 = new stack pointer / pre-reloc malloc area */
+ subi r3, r3, CONFIG_SYS_MALLOC_F_LEN
+
+ /* Set pointer to pre-reloc malloc area in GD */
+ stw r3, GD_MALLOC_BASE(r4)
+#endif
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 */
+ stwu r0, -4(r3) /* clear final stack frame so that */
+ stwu r0, -4(r3) /* stack backtraces terminate cleanly */
+ /* Finally, actually set SP */
+ mr r1, r3
/* let the C-code set up the rest */
/* */
/* run low-level CPU init code (in Flash)*/
bl cpu_init_f
- /* r3: BOOTFLAG */
- mr r3, r21
/* run 1st part of board init code (in Flash)*/
+ li r3, 0 /* clear boot_flag for calling board_init_f */
bl board_init_f
-#ifndef CONFIG_NAND_SPL
+ /* NOTREACHED - board_init_f() does not return */
+
+#ifndef MINIMAL_SPL
/*
* Vector Table
*/
lwz r1,GPR1(r1)
SYNC
rfi
-#endif /* !CONFIG_NAND_SPL */
+#endif /* !MINIMAL_SPL */
/*
* This code initialises the E300 processor core
lis r3, CONFIG_SYS_IMMR@h
#if defined(CONFIG_WATCHDOG)
- /* Initialise the Wathcdog values and reset it (if req) */
+ /* Initialise the Watchdog values and reset it (if req) */
/*------------------------------------------------------*/
lis r4, CONFIG_SYS_WATCHDOG_VALUE
ori r4, r4, (SWCRR_SWEN | SWCRR_SWRI | SWCRR_SWPR)
li r4, -0x55C7
sth r4, SWSRR@l(r3)
#else
- /* Disable Wathcdog */
+ /* Disable Watchdog */
/*-------------------*/
lwz r4, SWCRR(r3)
/* Check to see if its enabled for disabling
* Note: requires that all cache bits in
* HID0 are in the low half word.
*/
-#ifndef CONFIG_NAND_SPL
+#ifndef MINIMAL_SPL
.globl icache_enable
icache_enable:
mfspr r3, HID0
mfspr r3, HID0
rlwinm r3, r3, (31 - HID0_ICE_SHIFT + 1), 31, 31
blr
-#endif /* !CONFIG_NAND_SPL */
+#endif /* !MINIMAL_SPL */
.globl dcache_enable
dcache_enable:
stw r0,0(r3)
2: bdnz 1b
-#ifndef CONFIG_NAND_SPL
+#ifndef MINIMAL_SPL
/*
* Now adjust the fixups and the pointers to the fixups
* in case we need to move ourselves again.
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:
#endif
* 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
mr r4, r10 /* Destination Address */
bl board_init_r
-#ifndef CONFIG_NAND_SPL
+#ifndef MINIMAL_SPL
/*
* Copy exception vector code to low memory
*
mtlr r4 /* restore link register */
blr
-#endif /* !CONFIG_NAND_SPL */
+#endif /* !MINIMAL_SPL */
#ifdef CONFIG_SYS_INIT_RAM_LOCK
lock_ram_in_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) + \
+ li r4, ((CONFIG_SYS_INIT_RAM_SIZE & ~31) + \
(CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
mtctr r4
1:
sync
blr
-#ifndef CONFIG_NAND_SPL
+#ifndef MINIMAL_SPL
.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) + \
+ li r4, ((CONFIG_SYS_INIT_RAM_SIZE & ~31) + \
(CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
mtctr r4
1: icbi r0, r3
sync
mtspr HID0, r3 /* no invalidate, unlock */
blr
-#endif /* !CONFIG_NAND_SPL */
+#endif /* !MINIMAL_SPL */
#endif /* CONFIG_SYS_INIT_RAM_LOCK */
#ifdef CONFIG_SYS_FLASHBOOT
bne 1b
stw r4, LBLAWAR1(r3) /* LBLAWAR1 <= 8MB Flash Size */
+ /* Wait for HW to catch up */
+ lwz r4, LBLAWAR1(r3)
+ twi 0,r4,0
+ isync
blr
/* Though all the LBIU Local Access Windows and LBC Banks will be
xor r4, r4, r4
stw r4, LBLAWBAR1(r3)
stw r4, LBLAWAR1(r3) /* Off LBIU LAW1 */
+ /* Wait for HW to catch up */
+ lwz r4, LBLAWAR1(r3)
+ twi 0,r4,0
+ isync
blr
#endif /* CONFIG_SYS_FLASHBOOT */
projects / u-boot / blobdiff