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Diffstat (limited to 'lib_arm/board.c')
| -rw-r--r-- | lib_arm/board.c | 382 |
1 files changed, 382 insertions, 0 deletions
diff --git a/lib_arm/board.c b/lib_arm/board.c new file mode 100644 index 0000000..e58529f --- /dev/null +++ b/lib_arm/board.c @@ -0,0 +1,382 @@ +/* + * (C) Copyright 2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <command.h> +#include <devices.h> +#include <version.h> +#include <net.h> + + +const char version_string[] = + U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"; + +#ifdef CONFIG_DRIVER_CS8900 +extern void cs8900_get_enetaddr (uchar * addr); +#endif + +/* + * Begin and End of memory area for malloc(), and current "brk" + */ +static ulong mem_malloc_start = 0; +static ulong mem_malloc_end = 0; +static ulong mem_malloc_brk = 0; + +static void mem_malloc_init (ulong dest_addr) +{ + mem_malloc_start = dest_addr; + mem_malloc_end = dest_addr + CONFIG_MALLOC_SIZE; + mem_malloc_brk = mem_malloc_start; + + memset ((void *) mem_malloc_start, 0, + mem_malloc_end - mem_malloc_start); +} + +void *sbrk (ptrdiff_t increment) +{ + ulong old = mem_malloc_brk; + ulong new = old + increment; + + if ((new < mem_malloc_start) || (new > mem_malloc_end)) { + return (NULL); + } + mem_malloc_brk = new; + + return ((void *) old); +} + +/************************************************************************ + * Init Utilities * + ************************************************************************ + * Some of this code should be moved into the core functions, + * or dropped completely, + * but let's get it working (again) first... + */ + +static int init_baudrate (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + uchar tmp[64]; /* long enough for environment variables */ + int i = getenv_r ("baudrate", tmp, sizeof (tmp)); + + gd->baudrate = (i > 0) + ? (int) simple_strtoul (tmp, NULL, 10) + : CONFIG_BAUDRATE; + + return (0); +} + +static int display_banner (void) +{ + + printf ("\n\n%s\n\n", version_string); + printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n", + _armboot_start, _armboot_end_data, _armboot_end); +#ifdef CONFIG_MODEM_SUPPORT + puts ("Modem Support enabled\n"); +#endif +#ifdef CONFIG_USE_IRQ + printf ("IRQ Stack: %08lx\n", IRQ_STACK_START); + printf ("FIQ Stack: %08lx\n", FIQ_STACK_START); +#endif + return (0); +} + +/* + * WARNING: this code looks "cleaner" than the PowerPC version, but + * has the disadvantage that you either get nothing, or everything. + * On PowerPC, you might see "DRAM: " before the system hangs - which + * gives a simple yet clear indication which part of the + * initialization if failing. + */ +static int display_dram_config (void) +{ + DECLARE_GLOBAL_DATA_PTR; + int i; + + puts ("DRAM Configuration:\n"); + + for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) { + printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start); + print_size (gd->bd->bi_dram[i].size, "\n"); + } + + return (0); +} + +static void display_flash_config (ulong size) +{ + puts ("Flash: "); + print_size (size, "\n"); +} + + + +/* + * Breath some life into the board... + * + * Initialize an SMC for serial comms, and carry out some hardware + * tests. + * + * The first part of initialization is running from Flash memory; + * its main purpose is to initialize the RAM so that we + * can relocate the monitor code to RAM. + */ + +/* + * All attempts to come up with a "common" initialization sequence + * that works for all boards and architectures failed: some of the + * requirements are just _too_ different. To get rid of the resulting + * mess of board dependend #ifdef'ed code we now make the whole + * initialization sequence configurable to the user. + * + * The requirements for any new initalization function is simple: it + * receives a pointer to the "global data" structure as it's only + * argument, and returns an integer return code, where 0 means + * "continue" and != 0 means "fatal error, hang the system". + */ +typedef int (init_fnc_t) (void); + +init_fnc_t *init_sequence[] = { + cpu_init, /* basic cpu dependent setup */ + board_init, /* basic board dependent setup */ + interrupt_init, /* set up exceptions */ + env_init, /* initialize environment */ + init_baudrate, /* initialze baudrate settings */ + serial_init, /* serial communications setup */ + display_banner, + dram_init, /* configure available RAM banks */ + display_dram_config, + + NULL, +}; + +void start_armboot (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + ulong size; + gd_t gd_data; + bd_t bd_data; + init_fnc_t **init_fnc_ptr; +#ifdef CONFIG_VFD + unsigned long addr; +#endif + + /* Pointer is writable since we allocated a register for it */ + gd = &gd_data; + memset (gd, 0, sizeof (gd_t)); + gd->bd = &bd_data; + memset (gd->bd, 0, sizeof (bd_t)); + + for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { + if ((*init_fnc_ptr)() != 0) { + hang (); + } + } + + /* configure available FLASH banks */ + size = flash_init (); + display_flash_config (size); + +#ifdef CONFIG_VFD +#ifndef PAGE_SIZE +#define PAGE_SIZE 4096 +#endif + /* + * reserve memory for VFD display (always full pages) + */ + /* armboot_real_end is defined in the board-specific linker script */ + addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); + size = vfd_setmem (addr); + gd->fb_base = addr; + /* round to the next page boundary */ + addr += size; + addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); + mem_malloc_init (addr); +#else + /* armboot_real_end is defined in the board-specific linker script */ + mem_malloc_init (_armboot_real_end); +#endif /* CONFIG_VFD */ + +#ifdef CONFIG_VFD + /* must do this after the framebuffer is allocated */ + drv_vfd_init(); +#endif + /* initialize environment */ + env_relocate (); + + /* IP Address */ + bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr"); + + /* MAC Address */ + { + int i; + ulong reg; + char *s, *e; + uchar tmp[64]; + + i = getenv_r ("ethaddr", tmp, sizeof (tmp)); + s = (i > 0) ? tmp : NULL; + + for (reg = 0; reg < 6; ++reg) { + bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0; + if (s) + s = (*e) ? e + 1 : e; + } + } + +#if defined(CONFIG_MISC_INIT_R) + /* miscellaneous platform dependent initialisations */ + misc_init_r (); +#endif + + /* enable exceptions */ + enable_interrupts (); + +#ifdef CONFIG_DRIVER_CS8900 + if (!getenv ("ethaddr")) { + cs8900_get_enetaddr (gd->bd->bi_enetaddr); + } +#endif + +#ifdef BOARD_POST_INIT + board_post_init (); +#endif + + /* main_loop() can return to retry autoboot, if so just run it again. */ + for (;;) { + main_loop (); + } + + /* NOTREACHED - no way out of command loop except booting */ +} + +void hang (void) +{ + puts ("### ERROR ### Please RESET the board ###\n"); + for (;;); +} + +#ifdef CONFIG_MODEM_SUPPORT +/* called from main loop (common/main.c) */ +extern void dbg(const char *fmt, ...); +int mdm_init (void) +{ + char env_str[16]; + char *init_str; + int i; + extern char console_buffer[]; + static inline void mdm_readline(char *buf, int bufsiz); + extern void enable_putc(void); + extern int hwflow_onoff(int); + + enable_putc(); /* enable serial_putc() */ + +#ifdef CONFIG_HWFLOW + init_str = getenv("mdm_flow_control"); + if (init_str && (strcmp(init_str, "rts/cts") == 0)) + hwflow_onoff (1); + else + hwflow_onoff(-1); +#endif + + for (i = 1;;i++) { + sprintf(env_str, "mdm_init%d", i); + if ((init_str = getenv(env_str)) != NULL) { + serial_puts(init_str); + serial_puts("\n"); + for(;;) { + mdm_readline(console_buffer, CFG_CBSIZE); + dbg("ini%d: [%s]", i, console_buffer); + + if ((strcmp(console_buffer, "OK") == 0) || + (strcmp(console_buffer, "ERROR") == 0)) { + dbg("ini%d: cmd done", i); + break; + } else /* in case we are originating call ... */ + if (strncmp(console_buffer, "CONNECT", 7) == 0) { + dbg("ini%d: connect", i); + return 0; + } + } + } else + break; /* no init string - stop modem init */ + + udelay(100000); + } + + udelay(100000); + + /* final stage - wait for connect */ + for(;i > 1;) { /* if 'i' > 1 - wait for connection + message from modem */ + mdm_readline(console_buffer, CFG_CBSIZE); + dbg("ini_f: [%s]", console_buffer); + if (strncmp(console_buffer, "CONNECT", 7) == 0) { + dbg("ini_f: connected"); + return 0; + } + } + + return 0; +} + +/* 'inline' - We have to do it fast */ +static inline void mdm_readline(char *buf, int bufsiz) +{ + char c; + char *p; + int n; + + n = 0; + p = buf; + for(;;) { + c = serial_getc(); + + /* dbg("(%c)", c); */ + + switch(c) { + case '\r': + break; + case '\n': + *p = '\0'; + return; + + default: + if(n++ > bufsiz) { + *p = '\0'; + return; /* sanity check */ + } + *p = c; + p++; + break; + } + } +} +#endif /* CONFIG_MODEM_SUPPORT */ |