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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421 lines
10 KiB
421 lines
10 KiB
/*
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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 <devices.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 <asm/u-boot-i386.h>
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DECLARE_GLOBAL_DATA_PTR;
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extern long _i386boot_start;
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extern long _i386boot_end;
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extern long _i386boot_romdata_start;
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extern long _i386boot_romdata_dest;
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extern long _i386boot_romdata_size;
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extern long _i386boot_bss_start;
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extern long _i386boot_bss_size;
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extern long _i386boot_realmode;
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extern long _i386boot_realmode_size;
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extern long _i386boot_bios;
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extern long _i386boot_bios_size;
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/* The symbols defined by the linker script becomes pointers
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* which is somewhat inconveient ... */
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ulong i386boot_start = (ulong)&_i386boot_start; /* code start (in flash) defined in start.S */
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ulong i386boot_end = (ulong)&_i386boot_end; /* code end (in flash) */
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ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
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ulong i386boot_romdata_dest = (ulong)&_i386boot_romdata_dest; /* data location segment in ram */
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ulong i386boot_romdata_size = (ulong)&_i386boot_romdata_size; /* size of data segment */
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ulong i386boot_bss_start = (ulong)&_i386boot_bss_start; /* bss start */
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ulong i386boot_bss_size = (ulong)&_i386boot_bss_size; /* bss size */
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ulong i386boot_realmode = (ulong)&_i386boot_realmode; /* start of realmode entry code */
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ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
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ulong i386boot_bios = (ulong)&_i386boot_bios; /* start of BIOS emulation code */
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ulong i386boot_bios_size = (ulong)&_i386boot_bios_size; /* size of BIOS emulation code */
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const char version_string[] =
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U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
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/*
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* Begin and End of memory area for malloc(), and current "brk"
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*/
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static ulong mem_malloc_start = 0;
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static ulong mem_malloc_end = 0;
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static ulong mem_malloc_brk = 0;
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static int mem_malloc_init(void)
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{
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/* start malloc area right after the stack */
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mem_malloc_start = i386boot_bss_start +
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i386boot_bss_size + CFG_STACK_SIZE;
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mem_malloc_start = (mem_malloc_start+3)&~3;
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/* Use all available RAM for malloc() */
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mem_malloc_end = gd->ram_size;
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mem_malloc_brk = mem_malloc_start;
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return 0;
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}
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void *sbrk (ptrdiff_t increment)
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{
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ulong old = mem_malloc_brk;
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ulong new = old + increment;
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if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
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return (NULL);
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}
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mem_malloc_brk = new;
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return ((void *) old);
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}
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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_r("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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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+CFG_STACK_SIZE-1);
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return (0);
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}
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/*
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* WARNING: this code looks "cleaner" than the PowerPC version, but
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* has the disadvantage that you either get nothing, or everything.
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* On PowerPC, you might see "DRAM: " before the system hangs - which
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* gives a simple yet clear indication which part of the
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* initialization if failing.
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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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init_fnc_t *init_sequence[] = {
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cpu_init, /* basic cpu dependent setup */
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board_init, /* basic board dependent setup */
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dram_init, /* configure available RAM banks */
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mem_malloc_init, /* dependant on dram_init */
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interrupt_init, /* set up exceptions */
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timer_init,
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serial_init,
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env_init, /* initialize environment */
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init_baudrate, /* initialze baudrate settings */
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serial_init, /* serial communications setup */
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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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void start_i386boot (void)
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{
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char *s;
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int i;
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ulong size;
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static gd_t gd_data;
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static bd_t bd_data;
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init_fnc_t **init_fnc_ptr;
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show_boot_progress(0x21);
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gd = &gd_data;
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/* compiler optimization barrier needed for GCC >= 3.4 */
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__asm__ __volatile__("": : :"memory");
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memset (gd, 0, sizeof (gd_t));
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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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for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
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show_boot_progress(0xa130|i);
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if ((*init_fnc_ptr)() != 0) {
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hang ();
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}
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}
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show_boot_progress(0x23);
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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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/* IP Address */
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bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
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/* MAC Address */
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{
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int i;
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ulong reg;
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char *s, *e;
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char tmp[64];
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i = getenv_r ("ethaddr", tmp, sizeof (tmp));
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s = (i > 0) ? tmp : NULL;
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for (reg = 0; reg < 6; ++reg) {
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bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
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if (s)
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s = (*e) ? e + 1 : e;
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}
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}
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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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devices_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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/* Must happen after interrupts are initialized since
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* an irq handler gets installed
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*/
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#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
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serial_buffered_init();
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#endif
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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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#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 *[]), int argc, char *argv[])
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{
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/*
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* TODO: Test this function - changed to fix compiler error.
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* Original code was:
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* return (entry >> 1) (argc, argv);
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* with a comment about Nios function pointers are address >> 1
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*/
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return (entry) (argc, argv);
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}
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