diff options
Diffstat (limited to 'lib_mips')
| -rw-r--r-- | lib_mips/Makefile | 44 | ||||
| -rw-r--r-- | lib_mips/board.c | 403 | ||||
| -rw-r--r-- | lib_mips/mips_linux.c | 276 | ||||
| -rw-r--r-- | lib_mips/time.c | 103 |
4 files changed, 826 insertions, 0 deletions
diff --git a/lib_mips/Makefile b/lib_mips/Makefile new file mode 100644 index 0000000..540383d --- /dev/null +++ b/lib_mips/Makefile @@ -0,0 +1,44 @@ +# +# (C) Copyright 2003 +# Wolfgang Denk, DENX Software Engineering, wd@denx.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 $(TOPDIR)/config.mk + +LIB = lib$(ARCH).a + +AOBJS = + +COBJS = board.o time.o mips_linux.o + +OBJS = $(AOBJS) $(COBJS) + +$(LIB): .depend $(OBJS) + $(AR) crv $@ $(OBJS) + +######################################################################### + +.depend: Makefile $(AOBJS:.o=.S) $(COBJS:.o=.c) + $(CC) -M $(CFLAGS) $(AOBJS:.o=.S) $(COBJS:.o=.c) > $@ + +sinclude .depend + +######################################################################### diff --git a/lib_mips/board.c b/lib_mips/board.c new file mode 100644 index 0000000..81909d3 --- /dev/null +++ b/lib_mips/board.c @@ -0,0 +1,403 @@ +/* + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.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 <malloc.h> +#include <devices.h> +#include <syscall.h> +#include <version.h> +#include <net.h> +#include <environment.h> + +#if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \ + (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \ + defined(CFG_ENV_IS_IN_NVRAM) +#define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE) +#else +#define TOTAL_MALLOC_LEN CFG_MALLOC_LEN +#endif + +#undef DEBUG + +extern int timer_init(void); + +const char version_string[] = + U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"; + +static char *failed = "*** failed ***\n"; + +/* + * Begin and End of memory area for malloc(), and current "brk" + */ +static ulong mem_malloc_start; +static ulong mem_malloc_end; +static ulong mem_malloc_brk; + + +/* + * The Malloc area is immediately below the monitor copy in DRAM + */ +static void mem_malloc_init (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off; + + mem_malloc_end = dest_addr; + mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN; + 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); +} + + +static int init_func_ram (void) +{ + DECLARE_GLOBAL_DATA_PTR; + +#ifdef CONFIG_BOARD_TYPES + int board_type = gd->board_type; +#else + int board_type = 0; /* use dummy arg */ +#endif + puts ("DRAM: "); + + if ((gd->ram_size = initdram (board_type)) > 0) { + print_size (gd->ram_size, "\n"); + return (0); + } + puts (failed); + return (1); +} + +static int display_banner(void) +{ + + printf ("\n\n%s\n\n", version_string); + return (0); +} + +static void display_flash_config(ulong size) +{ + puts ("Flash: "); + print_size (size, "\n"); +} + + +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); +} + + +/* + * Breath some life into the board... + * + * 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[] = { + timer_init, + env_init, /* initialize environment */ + init_baudrate, /* initialze baudrate settings */ + serial_init, /* serial communications setup */ + console_init_f, + display_banner, /* say that we are here */ + init_func_ram, + NULL, +}; + + +void board_init_f(ulong bootflag) +{ + DECLARE_GLOBAL_DATA_PTR; + + gd_t gd_data, *id; + bd_t *bd; + init_fnc_t **init_fnc_ptr; + ulong addr, addr_sp, len = CFG_MONITOR_LEN; + + /* Pointer is writable since we allocated a register for it. + */ + gd = &gd_data; + memset (gd, 0, sizeof (gd_t)); + + for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { + if ((*init_fnc_ptr)() != 0) { + hang (); + } + } + + /* + * Now that we have DRAM mapped and working, we can + * relocate the code and continue running from DRAM. + */ + addr = CFG_SDRAM_BASE + gd->ram_size; + + /* We can reserve some RAM "on top" here. + */ + + /* round down to next 4 kB limit. + */ + addr &= ~(4096 - 1); +#ifdef DEBUG + printf ("Top of RAM usable for U-Boot at: %08lx\n", addr); +#endif + + /* Reserve memory for U-Boot code, data & bss + * round down to next 4 kB limit + */ + addr -= len; + addr &= ~(4096 - 1); + +#ifdef DEBUG + printf ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr); +#endif + + /* Reserve memory for malloc() arena. + */ + addr_sp = addr - TOTAL_MALLOC_LEN; +#ifdef DEBUG + printf ("Reserving %dk for malloc() at: %08lx\n", + TOTAL_MALLOC_LEN >> 10, addr_sp); +#endif + + /* + * (permanently) allocate a Board Info struct + * and a permanent copy of the "global" data + */ + addr_sp -= sizeof(bd_t); + bd = (bd_t *)addr_sp; + gd->bd = bd; +#ifdef DEBUG + printf ("Reserving %d Bytes for Board Info at: %08lx\n", + sizeof(bd_t), addr_sp); +#endif + addr_sp -= sizeof(gd_t); + id = (gd_t *)addr_sp; +#ifdef DEBUG + printf ("Reserving %d Bytes for Global Data at: %08lx\n", + sizeof (gd_t), addr_sp); +#endif + + /* Reserve memory for boot params. + */ + addr_sp -= CFG_BOOTPARAMS_LEN; + bd->bi_boot_params = addr_sp; +#ifdef DEBUG + printf ("Reserving %dk for malloc() at: %08lx\n", + CFG_BOOTPARAMS_LEN >> 10, addr_sp); +#endif + + /* + * Finally, we set up a new (bigger) stack. + * + * Leave some safety gap for SP, force alignment on 16 byte boundary + * Clear initial stack frame + */ + addr_sp -= 16; + addr_sp &= ~0xF; + *((ulong *) addr_sp)-- = 0; + *((ulong *) addr_sp)-- = 0; +#ifdef DEBUG + printf ("Stack Pointer at: %08lx\n", addr_sp); +#endif + /* + * Save local variables to board info struct + */ + bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */ + bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */ + bd->bi_baudrate = gd->baudrate; /* Console Baudrate */ + + memcpy (id, gd, sizeof (gd_t)); + relocate_code (addr_sp, id, addr); + + /* NOTREACHED - relocate_code() does not return */ +} +/************************************************************************ + * + * This is the next part if the initialization sequence: we are now + * running from RAM and have a "normal" C environment, i. e. global + * data can be written, BSS has been cleared, the stack size in not + * that critical any more, etc. + * + ************************************************************************ + */ + +void board_init_r (gd_t *id, ulong dest_addr) +{ + DECLARE_GLOBAL_DATA_PTR; + + cmd_tbl_t *cmdtp; + ulong size; + extern void malloc_bin_reloc (void); +#ifndef CFG_ENV_IS_NOWHERE + extern char * env_name_spec; +#endif + char *s, *e; + bd_t *bd; + int i; + + gd = id; + gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */ + +#ifdef DEBUG + printf ("Now running in RAM - U-Boot at: %08lx\n", dest_addr); +#endif + + gd->reloc_off = dest_addr - CFG_MONITOR_BASE; + + /* + * We have to relocate the command table manually + */ + for (cmdtp = &cmd_tbl[0]; cmdtp->name; cmdtp++) { + ulong addr; + + addr = (ulong) (cmdtp->cmd) + gd->reloc_off; +#if 0 + printf ("Command \"%s\": 0x%08lx => 0x%08lx\n", + cmdtp->name, (ulong) (cmdtp->cmd), addr); +#endif + cmdtp->cmd = + (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr; + + addr = (ulong)(cmdtp->name) + gd->reloc_off; + cmdtp->name = (char *)addr; + + if (cmdtp->usage) { + addr = (ulong)(cmdtp->usage) + gd->reloc_off; + cmdtp->usage = (char *)addr; + } +#ifdef CFG_LONGHELP + if (cmdtp->help) { + addr = (ulong)(cmdtp->help) + gd->reloc_off; + cmdtp->help = (char *)addr; + } +#endif + } + /* there are some other pointer constants we must deal with */ +#ifndef CFG_ENV_IS_NOWHERE + env_name_spec += gd->reloc_off; +#endif + + /* configure available FLASH banks */ + size = flash_init(); + display_flash_config (size); + + bd = gd->bd; + bd->bi_flashstart = CFG_FLASH_BASE; + bd->bi_flashsize = size; +#if CFG_MONITOR_BASE == CFG_FLASH_BASE + bd->bi_flashoffset = CFG_MONITOR_LEN; /* reserved area for U-Boot */ +#else + bd->bi_flashoffset = 0; +#endif + + /* initialize malloc() area */ + mem_malloc_init(); + malloc_bin_reloc(); + + /* relocate environment function pointers etc. */ + env_relocate(); + + /* board MAC address */ + s = getenv ("ethaddr"); + for (i = 0; i < 6; ++i) { + bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0; + if (s) + s = (*e) ? e + 1 : e; + } + + /* IP Address */ + bd->bi_ip_addr = getenv_IPaddr("ipaddr"); + +/** leave this here (after malloc(), environment and PCI are working) **/ + /* Initialize devices */ + devices_init (); + + /* allocate syscalls table (console_init_r will fill it in */ + syscall_tbl = (void **) malloc (NR_SYSCALLS * sizeof (void *)); + + /* Initialize the console (after the relocation and devices init) */ + console_init_r (); +/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/ + +#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) + puts ("Net: "); + eth_initialize(gd->bd); +#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 (;;); +} + diff --git a/lib_mips/mips_linux.c b/lib_mips/mips_linux.c new file mode 100644 index 0000000..e73d4d8 --- /dev/null +++ b/lib_mips/mips_linux.c @@ -0,0 +1,276 @@ +/* + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.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 <cmd_boot.h> +#include <image.h> +#include <zlib.h> +#include <asm/byteorder.h> +#include <asm/addrspace.h> + +#define LINUX_MAX_ENVS 256 +#define LINUX_MAX_ARGS 256 + +#ifdef CONFIG_SHOW_BOOT_PROGRESS +# include <status_led.h> +# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) +#else +# define SHOW_BOOT_PROGRESS(arg) +#endif + +extern image_header_t header; /* from cmd_bootm.c */ + +static int linux_argc; +static char ** linux_argv; + +static char ** linux_env; +static char * linux_env_p; +static int linux_env_idx; + +static void linux_params_init (ulong start, char * commandline); +static void linux_env_set (char * env_name, char * env_val); + + +void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], + ulong addr, ulong *len_ptr, int verify) +{ + DECLARE_GLOBAL_DATA_PTR; + + ulong len = 0, checksum; + ulong initrd_start, initrd_end; + ulong data; + void (*theKernel)(int, char **, char **, int *); + image_header_t *hdr = &header; + char *commandline = getenv("bootargs"); + char env_buf[12]; + + theKernel = (void (*)(int, char **, char **, int *))ntohl(hdr->ih_ep); + + /* + * Check if there is an initrd image + */ + if (argc >= 3) { + SHOW_BOOT_PROGRESS (9); + + addr = simple_strtoul(argv[2], NULL, 16); + + printf ("## Loading Ramdisk Image at %08lx ...\n", addr); + + /* Copy header so we can blank CRC field for re-calculation */ + memcpy (&header, (char *)addr, sizeof(image_header_t)); + + if (ntohl(hdr->ih_magic) != IH_MAGIC) { + printf ("Bad Magic Number\n"); + SHOW_BOOT_PROGRESS (-10); + do_reset (cmdtp, flag, argc, argv); + } + + data = (ulong)&header; + len = sizeof(image_header_t); + + checksum = ntohl(hdr->ih_hcrc); + hdr->ih_hcrc = 0; + + if (crc32 (0, (char *)data, len) != checksum) { + printf ("Bad Header Checksum\n"); + SHOW_BOOT_PROGRESS (-11); + do_reset (cmdtp, flag, argc, argv); + } + + SHOW_BOOT_PROGRESS (10); + + print_image_hdr (hdr); + + data = addr + sizeof(image_header_t); + len = ntohl(hdr->ih_size); + + if (verify) { + ulong csum = 0; + + printf (" Verifying Checksum ... "); + csum = crc32 (0, (char *)data, len); + if (csum != ntohl(hdr->ih_dcrc)) { + printf ("Bad Data CRC\n"); + SHOW_BOOT_PROGRESS (-12); + do_reset (cmdtp, flag, argc, argv); + } + printf ("OK\n"); + } + + SHOW_BOOT_PROGRESS (11); + + if ((hdr->ih_os != IH_OS_LINUX) || + (hdr->ih_arch != IH_CPU_MIPS) || + (hdr->ih_type != IH_TYPE_RAMDISK) ) { + printf ("No Linux MIPS Ramdisk Image\n"); + SHOW_BOOT_PROGRESS (-13); + do_reset (cmdtp, flag, argc, argv); + } + + /* + * Now check if we have a multifile image + */ + } else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) { + ulong tail = ntohl(len_ptr[0]) % 4; + int i; + + SHOW_BOOT_PROGRESS (13); + + /* skip kernel length and terminator */ + data = (ulong)(&len_ptr[2]); + /* skip any additional image length fields */ + for (i=1; len_ptr[i]; ++i) + data += 4; + /* add kernel length, and align */ + data += ntohl(len_ptr[0]); + if (tail) { + data += 4 - tail; + } + + len = ntohl(len_ptr[1]); + + } else { + /* + * no initrd image + */ + SHOW_BOOT_PROGRESS (14); + + data = 0; + } + +#ifdef DEBUG + if (!data) { + printf ("No initrd\n"); + } +#endif + + if (data) { + initrd_start = data; + initrd_end = initrd_start + len; + } else { + initrd_start = 0; + initrd_end = 0; + } + + SHOW_BOOT_PROGRESS (15); + +#ifdef DEBUG + printf ("## Transferring control to Linux (at address %08lx) ...\n", + (ulong)theKernel); +#endif + + linux_params_init (PHYSADDR(gd->bd->bi_boot_params), commandline); + + sprintf (env_buf, "%lu", gd->ram_size >> 20); + linux_env_set ("memsize", env_buf); + + sprintf (env_buf, "0x%08X", (uint)PHYSADDR(initrd_start)); + linux_env_set ("initrd_start", env_buf); + + sprintf (env_buf, "0x%X", (uint)(initrd_end - initrd_start)); + linux_env_set ("initrd_size", env_buf); + + sprintf (env_buf, "0x%08X", (uint)(gd->bd->bi_flashstart)); + linux_env_set ("flash_start", env_buf); + + sprintf (env_buf, "0x%X", (uint)(gd->bd->bi_flashsize)); + linux_env_set ("flash_size", env_buf); + + /* we assume that the kernel is in place */ + printf("\nStarting kernel ...\n\n"); + + theKernel(linux_argc, linux_argv, linux_env, 0); +} + +static void linux_params_init (ulong start, char * line) +{ + char * next, * quote, * argp; + + linux_argc = 1; + linux_argv = (char **) start; + linux_argv[0] = 0; + argp = (char *)(linux_argv + LINUX_MAX_ARGS); + + next = line; + + while (line && *line && linux_argc < LINUX_MAX_ARGS) + { + quote = strchr (line, '"'); + next = strchr (line, ' '); + + while (next != NULL && quote != NULL && quote < next) + { + /* we found a left quote before the next blank + * now we have to find the matching right quote + */ + next = strchr (quote + 1, '"'); + if (next != NULL) + { + quote = strchr (next + 1, '"'); + next = strchr (next + 1, ' '); + } + } + + if (next == NULL) + { + next = line + strlen (line); + } + + linux_argv [linux_argc] = argp; + memcpy (argp, line, next - line); + argp [next - line] = 0; + + argp += next - line + 1; + linux_argc ++; + + if (*next) next ++; + + line = next; + } + + linux_env = (char **)(((ulong)argp + 15) & ~15); + linux_env [0] = 0; + linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS); + linux_env_idx = 0; +} + +static void linux_env_set (char * env_name, char * env_val) +{ + if (linux_env_idx < LINUX_MAX_ENVS - 1) + { + linux_env [linux_env_idx] = linux_env_p; + + strcpy (linux_env_p, env_name); + linux_env_p += strlen (env_name); + + strcpy (linux_env_p, "="); + linux_env_p += 1; + + strcpy (linux_env_p, env_val); + linux_env_p += strlen (env_val); + + linux_env_p ++; + linux_env [++ linux_env_idx] = 0; + } +} diff --git a/lib_mips/time.c b/lib_mips/time.c new file mode 100644 index 0000000..9e6138d --- /dev/null +++ b/lib_mips/time.c @@ -0,0 +1,103 @@ +/* + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.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> + + +static inline void mips_compare_set(u32 v) +{ + asm volatile ("mtc0 %0, $11" : : "r" (v)); +} + +static inline void mips_count_set(u32 v) +{ + asm volatile ("mtc0 %0, $9" : : "r" (v)); +} + + +static inline u32 mips_count_get(void) +{ + u32 count; + + asm volatile ("mfc0 %0, $9" : "=r" (count) :); + return count; +} + +/* + * timer without interrupts + */ + +int timer_init(void) +{ + mips_compare_set(0); + mips_count_set(0); + + return 0; +} + +void reset_timer(void) +{ + mips_count_set(0); +} + +ulong get_timer(ulong base) +{ + return mips_count_get() - base; +} + +void set_timer(ulong t) +{ + mips_count_set(t); +} + +void udelay (unsigned long usec) +{ + ulong tmo; + ulong start = get_timer(0); + + tmo = usec * CFG_HZ / 1000; + tmo /= 1000; + + while ((ulong)((mips_count_get() - start)) < tmo) + /*NOP*/; +} + +/* + * This function is derived from PowerPC code (read timebase as long long). + * On MIPS it just returns the timer value. + */ +unsigned long long get_ticks(void) +{ + return mips_count_get(); +} + +/* + * This function is derived from PowerPC code (timebase clock frequency). + * On MIPS it returns the number of timer ticks per second. + */ +ulong get_tbclk(void) +{ + return CFG_HZ; +} + + |