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@ -38,6 +38,7 @@ |
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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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#include <elf.h> |
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#ifdef CONFIG_BITBANGMII |
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#include <miiphy.h> |
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@ -45,41 +46,16 @@ |
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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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/* 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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/* Exports from the Linker Script */ |
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extern ulong _i386boot_text_start; |
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extern ulong _i386boot_rel_dyn_start; |
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extern ulong _i386boot_rel_dyn_end; |
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extern ulong _i386boot_bss_start; |
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extern ulong _i386boot_bss_size; |
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void ram_bootstrap (void *); |
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const char version_string[] = |
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U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")"; |
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static int heap_init(void) |
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{ |
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/* start malloc area right after the stack */ |
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ulong start = i386boot_bss_start + i386boot_bss_size + |
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CONFIG_SYS_STACK_SIZE; |
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/* 4-byte aligned */ |
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start = (start+3)&~3; |
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mem_malloc_init(start, CONFIG_SYS_MALLOC_LEN); |
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return 0; |
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} |
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/************************************************************************
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* Init Utilities * |
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************************************************************************ |
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@ -103,6 +79,7 @@ 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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/*
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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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@ -111,6 +88,7 @@ static int display_banner (void) |
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i386boot_bss_start+i386boot_bss_size, |
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i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1); |
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*/ |
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return (0); |
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} |
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@ -142,7 +120,6 @@ static void display_flash_config (ulong size) |
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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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@ -154,6 +131,7 @@ static void display_flash_config (ulong size) |
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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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@ -169,13 +147,12 @@ static void display_flash_config (ulong size) |
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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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serial_init, |
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cpu_init_r, /* basic cpu dependent setup */ |
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board_early_init_r, /* basic board dependent setup */ |
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dram_init, /* configure available RAM banks */ |
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heap_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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@ -187,21 +164,86 @@ init_fnc_t *init_sequence[] = { |
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gd_t *gd; |
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void start_i386boot (void) |
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/*
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* Load U-Boot into RAM, initialize BSS, perform relocation adjustments |
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*/ |
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void board_init_f (ulong stack_limit) |
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{ |
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void *text_start = &_i386boot_text_start; |
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void *u_boot_cmd_end = &__u_boot_cmd_end; |
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Elf32_Rel *rel_dyn_start = (Elf32_Rel *)&_i386boot_rel_dyn_start; |
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Elf32_Rel *rel_dyn_end = (Elf32_Rel *)&_i386boot_rel_dyn_end; |
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void *bss_start = &_i386boot_bss_start; |
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void *bss_size = &_i386boot_bss_size; |
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size_t uboot_size; |
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void *ram_start; |
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ulong rel_offset; |
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Elf32_Rel *re; |
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void (*start_func)(void *); |
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/* compiler optimization barrier needed for GCC >= 3.4 */ |
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__asm__ __volatile__("": : :"memory"); |
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uboot_size = (size_t)u_boot_cmd_end - (size_t)text_start; |
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ram_start = (void *)stack_limit - (uboot_size + (ulong)bss_size); |
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rel_offset = text_start - ram_start; |
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start_func = ram_bootstrap - rel_offset; |
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/* First stage CPU initialization */ |
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if (cpu_init_f() != 0) |
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hang(); |
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/* First stage Board initialization */ |
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if (board_early_init_f() != 0) |
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hang(); |
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/* Copy U-Boot into RAM */ |
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memcpy(ram_start, text_start, (size_t)uboot_size); |
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/* Clear BSS */ |
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memset(bss_start - rel_offset, 0, (size_t)bss_size); |
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/* Perform relocation adjustments */ |
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for (re = rel_dyn_start; re < rel_dyn_end; re++) |
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{ |
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if (re->r_offset >= TEXT_BASE) |
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if (*(ulong *)re->r_offset >= TEXT_BASE) |
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*(ulong *)(re->r_offset - rel_offset) -= (Elf32_Addr)rel_offset; |
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} |
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start_func(ram_start); |
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/* NOTREACHED - relocate_code() does not return */ |
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while(1); |
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} |
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/*
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* All attempts to jump straight from board_init_f() to board_init_r() |
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* have failed, hence this special 'bootstrap' function. |
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*/ |
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void ram_bootstrap (void *ram_start) |
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{ |
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static gd_t 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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board_init_r(&gd_data, (ulong)ram_start); |
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} |
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void board_init_r(gd_t *id, ulong ram_start) |
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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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#ifndef CONFIG_SKIP_RELOCATE_UBOOT |
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cmd_tbl_t *p; |
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#endif |
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show_boot_progress(0x21); |
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gd = &gd_data; |
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gd = id; |
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/* compiler optimization barrier needed for GCC >= 3.4 */ |
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__asm__ __volatile__("": : :"memory"); |
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@ -212,10 +254,11 @@ void start_i386boot (void) |
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gd->baudrate = CONFIG_BAUDRATE; |
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#ifndef CONFIG_SKIP_RELOCATE_UBOOT |
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/* Need to set relocation offset here for interrupt initialization */ |
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gd->reloc_off = CONFIG_SYS_BL_START_RAM - TEXT_BASE; |
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#endif |
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gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */ |
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mem_malloc_init((((ulong)ram_start - CONFIG_SYS_MALLOC_LEN)+3)&~3, |
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CONFIG_SYS_MALLOC_LEN); |
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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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@ -225,26 +268,6 @@ void start_i386boot (void) |
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} |
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show_boot_progress(0x23); |
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#ifndef CONFIG_SKIP_RELOCATE_UBOOT |
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for (p = &__u_boot_cmd_start; p != &__u_boot_cmd_end; p++) { |
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ulong addr; |
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addr = (ulong) (p->cmd) + gd->reloc_off; |
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p->cmd = (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr; |
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addr = (ulong)(p->name) + gd->reloc_off; |
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p->name = (char *)addr; |
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if (p->usage != NULL) { |
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addr = (ulong)(p->usage) + gd->reloc_off; |
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p->usage = (char *)addr; |
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} |
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#ifdef CONFIG_SYS_LONGHELP |
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if (p->help != NULL) { |
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addr = (ulong)(p->help) + gd->reloc_off; |
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p->help = (char *)addr; |
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} |
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#endif |
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} |
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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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Graeme Russ
15 years ago
committed by
Wolfgang Denk