mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-10 06:43:28 +09:00
![Mike Frysinger](/assets/img/avatar_default.png)
This is long over due. All but two net drivers have been converted, but those have now been dropped. The only thing left to do is actually delete all references to NET_MULTI and code that is compiled when that is not defined. So here we scrub the core code. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
392 lines
9.4 KiB
C
392 lines
9.4 KiB
C
/*
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* (C) Copyright 2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.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 <command.h>
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#include <malloc.h>
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#include <stdio_dev.h>
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#include <version.h>
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#include <net.h>
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#include <environment.h>
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#include <nand.h>
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#include <onenand_uboot.h>
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#include <spi.h>
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#ifdef CONFIG_BITBANGMII
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#include <miiphy.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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#undef DEBUG
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extern int timer_init(void);
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extern int incaip_set_cpuclk(void);
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extern ulong uboot_end_data;
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extern ulong uboot_end;
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ulong monitor_flash_len;
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static char *failed = "*** failed ***\n";
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/*
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* mips_io_port_base is the begin of the address space to which x86 style
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* I/O ports are mapped.
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*/
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unsigned long mips_io_port_base = -1;
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int __board_early_init_f(void)
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{
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/*
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* Nothing to do in this dummy implementation
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*/
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return 0;
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}
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int board_early_init_f(void) __attribute__((weak, alias("__board_early_init_f")));
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static int init_func_ram (void)
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{
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#ifdef CONFIG_BOARD_TYPES
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int board_type = gd->board_type;
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#else
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int board_type = 0; /* use dummy arg */
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#endif
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puts ("DRAM: ");
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if ((gd->ram_size = initdram (board_type)) > 0) {
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print_size (gd->ram_size, "\n");
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return (0);
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}
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puts (failed);
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return (1);
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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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return (0);
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}
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#ifndef CONFIG_SYS_NO_FLASH
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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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#endif
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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, sizeof (tmp));
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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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/*
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* Breath some life into the board...
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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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board_early_init_f,
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timer_init,
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env_init, /* initialize environment */
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#ifdef CONFIG_INCA_IP
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incaip_set_cpuclk, /* set cpu clock according to environment variable */
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#endif
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init_baudrate, /* initialze baudrate settings */
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serial_init, /* serial communications setup */
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console_init_f,
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display_banner, /* say that we are here */
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checkboard,
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init_func_ram,
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NULL,
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};
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void board_init_f(ulong bootflag)
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{
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gd_t gd_data, *id;
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bd_t *bd;
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init_fnc_t **init_fnc_ptr;
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ulong addr, addr_sp, len = (ulong)&uboot_end - CONFIG_SYS_MONITOR_BASE;
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ulong *s;
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/* Pointer is writable since we allocated a register for it.
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*/
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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 ((void *)gd, 0, sizeof (gd_t));
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for (init_fnc_ptr = init_sequence; *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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}
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/*
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* Now that we have DRAM mapped and working, we can
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* relocate the code and continue running from DRAM.
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*/
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addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
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/* We can reserve some RAM "on top" here.
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*/
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/* round down to next 4 kB limit.
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*/
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addr &= ~(4096 - 1);
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debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
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/* Reserve memory for U-Boot code, data & bss
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* round down to next 16 kB limit
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*/
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addr -= len;
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addr &= ~(16 * 1024 - 1);
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debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
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/* Reserve memory for malloc() arena.
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*/
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addr_sp = addr - TOTAL_MALLOC_LEN;
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debug ("Reserving %dk for malloc() at: %08lx\n",
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TOTAL_MALLOC_LEN >> 10, addr_sp);
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/*
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* (permanently) allocate a Board Info struct
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* and a permanent copy of the "global" data
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*/
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addr_sp -= sizeof(bd_t);
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bd = (bd_t *)addr_sp;
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gd->bd = bd;
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debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
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sizeof(bd_t), addr_sp);
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addr_sp -= sizeof(gd_t);
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id = (gd_t *)addr_sp;
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debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
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sizeof (gd_t), addr_sp);
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/* Reserve memory for boot params.
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*/
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addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
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bd->bi_boot_params = addr_sp;
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debug ("Reserving %dk for boot params() at: %08lx\n",
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CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
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/*
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* Finally, we set up a new (bigger) stack.
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*
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* Leave some safety gap for SP, force alignment on 16 byte boundary
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* Clear initial stack frame
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*/
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addr_sp -= 16;
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addr_sp &= ~0xF;
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s = (ulong *)addr_sp;
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*s-- = 0;
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*s-- = 0;
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addr_sp = (ulong)s;
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debug ("Stack Pointer at: %08lx\n", addr_sp);
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/*
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* Save local variables to board info struct
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*/
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bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */
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bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
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bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
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memcpy (id, (void *)gd, sizeof (gd_t));
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relocate_code (addr_sp, id, addr);
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/* NOTREACHED - relocate_code() does not return */
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}
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/************************************************************************
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*
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* This is the next part if the initialization sequence: we are now
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* running from RAM and have a "normal" C environment, i. e. global
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* data can be written, BSS has been cleared, the stack size in not
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* that critical any more, etc.
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*
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************************************************************************
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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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#ifndef CONFIG_SYS_NO_FLASH
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ulong size;
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#endif
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extern void malloc_bin_reloc (void);
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#ifndef CONFIG_ENV_IS_NOWHERE
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extern char * env_name_spec;
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#endif
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char *s;
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bd_t *bd;
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gd = id;
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gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
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debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
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gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
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monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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/*
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* We have to relocate the command table manually
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*/
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fixup_cmdtable(&__u_boot_cmd_start,
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(ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
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#endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
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/* there are some other pointer constants we must deal with */
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#ifndef CONFIG_ENV_IS_NOWHERE
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env_name_spec += gd->reloc_off;
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#endif
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bd = gd->bd;
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/* The Malloc area is immediately below the monitor copy in DRAM */
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mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
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TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
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malloc_bin_reloc();
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#ifndef CONFIG_SYS_NO_FLASH
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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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bd->bi_flashsize = size;
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#endif
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bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
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#if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
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bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
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#else
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bd->bi_flashoffset = 0;
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#endif
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#ifdef CONFIG_CMD_NAND
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puts ("NAND: ");
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nand_init (); /* go init the NAND */
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#endif
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#if defined(CONFIG_CMD_ONENAND)
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onenand_init();
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#endif
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/* relocate environment function pointers etc. */
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env_relocate();
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/* IP Address */
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bd->bi_ip_addr = getenv_IPaddr("ipaddr");
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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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/** leave this here (after malloc(), environment and PCI are working) **/
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/* Initialize stdio devices */
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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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/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
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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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#ifdef CONFIG_CMD_SPI
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puts ("SPI: ");
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spi_init (); /* go init the SPI */
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puts ("ready\n");
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#endif
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#if defined(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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#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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puts ("Net: ");
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eth_initialize(gd->bd);
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#endif
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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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