upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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480 lines
11 KiB
480 lines
11 KiB
/*
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* (C) Copyright 2008-2011
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* Graeme Russ, <graeme.russ@gmail.com>
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*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
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*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <command.h>
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#include <stdio_dev.h>
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#include <timestamp.h>
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#include <version.h>
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#include <malloc.h>
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#include <net.h>
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#include <ide.h>
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#include <serial.h>
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#include <asm/u-boot-x86.h>
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#include <elf.h>
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#ifdef CONFIG_BITBANGMII
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#include <miiphy.h>
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#endif
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/*
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* Pointer to initial global data area
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*
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* Here we initialize it.
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*/
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#undef XTRN_DECLARE_GLOBAL_DATA_PTR
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#define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */
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DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
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/* Exports from the Linker Script */
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extern ulong __text_start;
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extern ulong __data_end;
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extern ulong __rel_dyn_start;
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extern ulong __rel_dyn_end;
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extern ulong __bss_start;
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extern ulong __bss_end;
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const char version_string[] =
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U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
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/************************************************************************
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* Init Utilities *
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************************************************************************
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* Some of this code should be moved into the core functions,
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* or dropped completely,
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* but let's get it working (again) first...
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*/
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static int init_baudrate (void)
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{
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char tmp[64]; /* long enough for environment variables */
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int i = getenv_f("baudrate", tmp, 64);
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gd->baudrate = (i != 0)
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? (int) simple_strtoul (tmp, NULL, 10)
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: CONFIG_BAUDRATE;
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return (0);
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}
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static int display_banner (void)
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{
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printf ("\n\n%s\n\n", version_string);
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/*
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printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
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" BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
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i386boot_start, i386boot_romdata_start-1,
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i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
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i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
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i386boot_bss_start+i386boot_bss_size,
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i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
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*/
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return (0);
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}
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static int display_dram_config (void)
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{
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int i;
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puts ("DRAM Configuration:\n");
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for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
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printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
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print_size (gd->bd->bi_dram[i].size, "\n");
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}
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return (0);
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}
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static void display_flash_config (ulong size)
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{
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puts ("Flash: ");
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print_size (size, "\n");
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}
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/*
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* Breath some life into the board...
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*
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* Initialize an SMC for serial comms, and carry out some hardware
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* tests.
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*
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* The first part of initialization is running from Flash memory;
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* its main purpose is to initialize the RAM so that we
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* can relocate the monitor code to RAM.
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*/
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/*
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* All attempts to come up with a "common" initialization sequence
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* that works for all boards and architectures failed: some of the
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* requirements are just _too_ different. To get rid of the resulting
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* mess of board dependend #ifdef'ed code we now make the whole
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* initialization sequence configurable to the user.
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*
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* The requirements for any new initalization function is simple: it
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* receives a pointer to the "global data" structure as it's only
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* argument, and returns an integer return code, where 0 means
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* "continue" and != 0 means "fatal error, hang the system".
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*/
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typedef int (init_fnc_t) (void);
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static int calculate_relocation_address(void);
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static int copy_uboot_to_ram(void);
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static int clear_bss(void);
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static int do_elf_reloc_fixups(void);
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init_fnc_t *init_sequence_f[] = {
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cpu_init_f,
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board_early_init_f,
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env_init,
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init_baudrate,
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serial_init,
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console_init_f,
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dram_init_f,
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calculate_relocation_address,
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copy_uboot_to_ram,
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clear_bss,
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do_elf_reloc_fixups,
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NULL,
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};
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init_fnc_t *init_sequence_r[] = {
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cpu_init_r, /* basic cpu dependent setup */
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board_early_init_r, /* basic board dependent setup */
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dram_init, /* configure available RAM banks */
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interrupt_init, /* set up exceptions */
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timer_init,
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display_banner,
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display_dram_config,
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NULL,
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};
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gd_t *gd;
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static int calculate_relocation_address(void)
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{
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void *text_start = &__text_start;
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void *bss_end = &__bss_end;
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void *dest_addr;
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ulong rel_offset;
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/* Calculate destination RAM Address and relocation offset */
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dest_addr = (void *)gd->ram_size;
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dest_addr -= CONFIG_SYS_STACK_SIZE;
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dest_addr -= (bss_end - text_start);
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rel_offset = dest_addr - text_start;
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gd->start_addr_sp = gd->ram_size;
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gd->relocaddr = (ulong)dest_addr;
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gd->reloc_off = rel_offset;
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return 0;
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}
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static int copy_uboot_to_ram(void)
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{
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ulong *dst_addr = (ulong *)gd->relocaddr;
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ulong *src_addr = (ulong *)&__text_start;
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ulong *end_addr = (ulong *)&__data_end;
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while (src_addr < end_addr)
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*dst_addr++ = *src_addr++;
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return 0;
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}
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static int clear_bss(void)
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{
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void *bss_start = &__bss_start;
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void *bss_end = &__bss_end;
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ulong *dst_addr = (ulong *)(bss_start + gd->reloc_off);
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ulong *end_addr = (ulong *)(bss_end + gd->reloc_off);;
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while (dst_addr < end_addr)
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*dst_addr++ = 0x00000000;
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return 0;
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}
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static int do_elf_reloc_fixups(void)
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{
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Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
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Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
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do {
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if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE)
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if (*(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) >= CONFIG_SYS_TEXT_BASE)
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*(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) += gd->reloc_off;
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} while (re_src++ < re_end);
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return 0;
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}
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/* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */
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void board_init_f(ulong boot_flags)
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{
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init_fnc_t **init_fnc_ptr;
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gd->flags = boot_flags;
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for (init_fnc_ptr = init_sequence_f; *init_fnc_ptr; ++init_fnc_ptr) {
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if ((*init_fnc_ptr)() != 0)
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hang();
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}
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gd->flags |= GD_FLG_RELOC;
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/* Enter the relocated U-Boot! */
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relocate_code(gd->start_addr_sp, gd, gd->relocaddr);
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/* NOTREACHED - relocate_code() does not return */
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while(1);
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}
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void board_init_r(gd_t *id, ulong dest_addr)
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{
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char *s;
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ulong size;
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static bd_t bd_data;
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static gd_t gd_data;
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init_fnc_t **init_fnc_ptr;
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show_boot_progress(0x21);
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/* Global data pointer is now writable */
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gd = &gd_data;
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memcpy(gd, id, sizeof(gd_t));
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/* compiler optimization barrier needed for GCC >= 3.4 */
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__asm__ __volatile__("": : :"memory");
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gd->bd = &bd_data;
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memset (gd->bd, 0, sizeof (bd_t));
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show_boot_progress(0x22);
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gd->baudrate = CONFIG_BAUDRATE;
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mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
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CONFIG_SYS_MALLOC_LEN);
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for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
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if ((*init_fnc_ptr)() != 0)
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hang ();
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}
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show_boot_progress(0x23);
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#ifdef CONFIG_SERIAL_MULTI
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serial_initialize();
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#endif
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/* configure available FLASH banks */
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size = flash_init();
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display_flash_config(size);
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show_boot_progress(0x24);
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show_boot_progress(0x25);
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/* initialize environment */
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env_relocate ();
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show_boot_progress(0x26);
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#ifdef CONFIG_CMD_NET
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/* IP Address */
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bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
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#endif
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#if defined(CONFIG_PCI)
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/*
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* Do pci configuration
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*/
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pci_init();
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#endif
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show_boot_progress(0x27);
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stdio_init ();
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jumptable_init ();
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/* Initialize the console (after the relocation and devices init) */
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console_init_r();
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#ifdef CONFIG_MISC_INIT_R
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/* miscellaneous platform dependent initialisations */
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misc_init_r();
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#endif
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#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
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WATCHDOG_RESET();
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puts ("PCMCIA:");
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pcmcia_init();
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#endif
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#if defined(CONFIG_CMD_KGDB)
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WATCHDOG_RESET();
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puts("KGDB: ");
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kgdb_init();
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#endif
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/* enable exceptions */
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enable_interrupts();
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show_boot_progress(0x28);
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#ifdef CONFIG_STATUS_LED
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status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
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#endif
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udelay(20);
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set_timer (0);
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/* Initialize from environment */
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if ((s = getenv ("loadaddr")) != NULL) {
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load_addr = simple_strtoul (s, NULL, 16);
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}
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#if defined(CONFIG_CMD_NET)
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if ((s = getenv ("bootfile")) != NULL) {
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copy_filename (BootFile, s, sizeof (BootFile));
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}
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#endif
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WATCHDOG_RESET();
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#if defined(CONFIG_CMD_IDE)
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WATCHDOG_RESET();
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puts("IDE: ");
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ide_init();
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#endif
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#if defined(CONFIG_CMD_SCSI)
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WATCHDOG_RESET();
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puts("SCSI: ");
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scsi_init();
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#endif
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#if defined(CONFIG_CMD_DOC)
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WATCHDOG_RESET();
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puts("DOC: ");
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doc_init();
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#endif
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#ifdef CONFIG_BITBANGMII
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bb_miiphy_init();
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#endif
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#if defined(CONFIG_CMD_NET)
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#if defined(CONFIG_NET_MULTI)
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WATCHDOG_RESET();
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puts("Net: ");
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#endif
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eth_initialize(gd->bd);
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#endif
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#if ( defined(CONFIG_CMD_NET)) && (0)
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WATCHDOG_RESET();
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# ifdef DEBUG
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puts ("Reset Ethernet PHY\n");
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# endif
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reset_phy();
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#endif
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#ifdef CONFIG_LAST_STAGE_INIT
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WATCHDOG_RESET();
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/*
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* Some parts can be only initialized if all others (like
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* Interrupts) are up and running (i.e. the PC-style ISA
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* keyboard).
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*/
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last_stage_init();
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#endif
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#ifdef CONFIG_POST
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post_run (NULL, POST_RAM | post_bootmode_get(0));
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#endif
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show_boot_progress(0x29);
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/* main_loop() can return to retry autoboot, if so just run it again. */
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for (;;) {
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main_loop();
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}
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/* NOTREACHED - no way out of command loop except booting */
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}
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void hang (void)
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{
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puts ("### ERROR ### Please RESET the board ###\n");
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for (;;);
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}
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unsigned long do_go_exec (ulong (*entry)(int, char * const []), int argc, char * const argv[])
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{
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unsigned long ret = 0;
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char **argv_tmp;
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/*
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* x86 does not use a dedicated register to pass the pointer to
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* the global_data, so it is instead passed as argv[-1]. By using
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* argv[-1], the called 'Application' can use the contents of
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* argv natively. However, to safely use argv[-1] a new copy of
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* argv is needed with the extra element
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*/
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argv_tmp = malloc(sizeof(char *) * (argc + 1));
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if (argv_tmp) {
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argv_tmp[0] = (char *)gd;
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memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
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ret = (entry) (argc, &argv_tmp[1]);
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free(argv_tmp);
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}
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return ret;
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}
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void setup_pcat_compatibility(void)
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__attribute__((weak, alias("__setup_pcat_compatibility")));
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void __setup_pcat_compatibility(void)
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{
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}
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