mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-10-02 09:30:43 +09:00
7cb22f97ee
environment variable which can set to "100", "133", or "150". The CPU clock will be configured accordingly upon next reboot. Other values are ignored. In case of an invalid or undefined "cpuclk" value, the compile-time default CPU clock speed will be used. * Enable Quad-UART on BMS2003 board (initialize the PCMCIA memory window that is used to access the UART registers by the Linux driver) * Patch by Reinhard Meyer, 20 Dec 2003: Fix clock calculation for the MPC5200 for higher clock frequencies (above 2**32 / 10 = 429.5 MHz).
439 lines
10 KiB
C
439 lines
10 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 <devices.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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#if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
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(CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
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defined(CFG_ENV_IS_IN_NVRAM)
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#define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
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#else
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#define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
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#endif
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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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const char version_string[] =
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U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
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static char *failed = "*** failed ***\n";
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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;
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static ulong mem_malloc_end;
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static ulong mem_malloc_brk;
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/*
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* The Malloc area is immediately below the monitor copy in DRAM
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*/
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static void mem_malloc_init (void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
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mem_malloc_end = dest_addr;
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mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
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mem_malloc_brk = mem_malloc_start;
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memset ((void *) mem_malloc_start,
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0,
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mem_malloc_end - mem_malloc_start);
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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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static int init_func_ram (void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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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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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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static int init_baudrate (void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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uchar tmp[64]; /* long enough for environment variables */
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int i = getenv_r ("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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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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DECLARE_GLOBAL_DATA_PTR;
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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 - CFG_MONITOR_BASE;
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#ifdef CONFIG_PURPLE
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void copy_code (ulong);
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#endif
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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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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 = CFG_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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#ifdef DEBUG
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printf ("Top of RAM usable for U-Boot at: %08lx\n", addr);
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#endif
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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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#ifdef DEBUG
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printf ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
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#endif
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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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#ifdef DEBUG
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printf ("Reserving %dk for malloc() at: %08lx\n",
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TOTAL_MALLOC_LEN >> 10, addr_sp);
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#endif
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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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#ifdef DEBUG
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printf ("Reserving %d Bytes for Board Info at: %08lx\n",
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sizeof(bd_t), addr_sp);
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#endif
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addr_sp -= sizeof(gd_t);
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id = (gd_t *)addr_sp;
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#ifdef DEBUG
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printf ("Reserving %d Bytes for Global Data at: %08lx\n",
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sizeof (gd_t), addr_sp);
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#endif
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/* Reserve memory for boot params.
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*/
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addr_sp -= CFG_BOOTPARAMS_LEN;
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bd->bi_boot_params = addr_sp;
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#ifdef DEBUG
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printf ("Reserving %dk for malloc() at: %08lx\n",
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CFG_BOOTPARAMS_LEN >> 10, addr_sp);
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#endif
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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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*((ulong *) addr_sp)-- = 0;
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*((ulong *) addr_sp)-- = 0;
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#ifdef DEBUG
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printf ("Stack Pointer at: %08lx\n", addr_sp);
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#endif
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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 = CFG_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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/* On the purple board we copy the code in a special way
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* in order to solve flash problems
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*/
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#ifdef CONFIG_PURPLE
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copy_code(addr);
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#endif
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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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DECLARE_GLOBAL_DATA_PTR;
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cmd_tbl_t *cmdtp;
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ulong size;
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extern void malloc_bin_reloc (void);
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#ifndef CFG_ENV_IS_NOWHERE
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extern char * env_name_spec;
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#endif
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char *s, *e;
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bd_t *bd;
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int i;
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gd = id;
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gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
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#ifdef DEBUG
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printf ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
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#endif
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gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
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monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
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/*
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* We have to relocate the command table manually
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*/
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for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
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ulong addr;
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addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
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#if 0
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printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
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cmdtp->name, (ulong) (cmdtp->cmd), addr);
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#endif
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cmdtp->cmd =
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(int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
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addr = (ulong)(cmdtp->name) + gd->reloc_off;
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cmdtp->name = (char *)addr;
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if (cmdtp->usage) {
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addr = (ulong)(cmdtp->usage) + gd->reloc_off;
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cmdtp->usage = (char *)addr;
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}
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#ifdef CFG_LONGHELP
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if (cmdtp->help) {
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addr = (ulong)(cmdtp->help) + gd->reloc_off;
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cmdtp->help = (char *)addr;
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}
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#endif
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}
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/* there are some other pointer constants we must deal with */
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#ifndef CFG_ENV_IS_NOWHERE
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env_name_spec += gd->reloc_off;
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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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bd = gd->bd;
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bd->bi_flashstart = CFG_FLASH_BASE;
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bd->bi_flashsize = size;
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#if CFG_MONITOR_BASE == CFG_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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/* initialize malloc() area */
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mem_malloc_init();
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malloc_bin_reloc();
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/* relocate environment function pointers etc. */
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env_relocate();
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/* board MAC address */
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s = getenv ("ethaddr");
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for (i = 0; i < 6; ++i) {
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bd->bi_enetaddr[i] = 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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/* IP Address */
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bd->bi_ip_addr = getenv_IPaddr("ipaddr");
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/** leave this here (after malloc(), environment and PCI are working) **/
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/* Initialize devices */
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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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/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
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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 (CONFIG_COMMANDS & CFG_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 /* CFG_CMD_NET */
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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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#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI)
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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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