#include <serial.h>
#include <asm/u-boot-x86.h>
#include <elf.h>
+#include <asm/processor.h>
#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif
-/*
- * Pointer to initial global data area
- *
- * Here we initialize it.
- */
-#undef XTRN_DECLARE_GLOBAL_DATA_PTR
-#define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */
-DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
-
-
-/* Exports from the Linker Script */
-extern ulong __text_start;
-extern ulong __data_end;
-extern ulong __rel_dyn_start;
-extern ulong __rel_dyn_end;
-extern ulong __bss_start;
-extern ulong __bss_end;
-
/************************************************************************
* Init Utilities *
************************************************************************
* or dropped completely,
* but let's get it working (again) first...
*/
-static int init_baudrate (void)
+static int init_baudrate(void)
{
gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
return 0;
}
-static int display_banner (void)
+static int display_banner(void)
{
- printf ("\n\n%s\n\n", version_string);
-/*
- printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
- " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
- i386boot_start, i386boot_romdata_start-1,
- i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
- i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
- i386boot_bss_start+i386boot_bss_size,
- i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
-
-*/
+ printf("\n\n%s\n\n", version_string);
- return (0);
+ return 0;
}
-static int display_dram_config (void)
+static int display_dram_config(void)
{
int i;
- puts ("DRAM Configuration:\n");
+ 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");
+ 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);
+ return 0;
}
-static void display_flash_config (ulong size)
+#ifndef CONFIG_SYS_NO_FLASH
+static void display_flash_config(ulong size)
{
- puts ("Flash: ");
- print_size (size, "\n");
+ puts("Flash: ");
+ print_size(size, "\n");
}
+#endif
/*
* Breath some life into the board...
static int copy_uboot_to_ram(void);
static int clear_bss(void);
static int do_elf_reloc_fixups(void);
+static int copy_gd_to_ram(void);
init_fnc_t *init_sequence_f[] = {
cpu_init_f,
console_init_f,
dram_init_f,
calculate_relocation_address,
- copy_uboot_to_ram,
- clear_bss,
- do_elf_reloc_fixups,
NULL,
};
NULL,
};
-gd_t *gd;
-
static int calculate_relocation_address(void)
{
- void *text_start = &__text_start;
- void *bss_end = &__bss_end;
- void *dest_addr;
- ulong rel_offset;
+ ulong text_start = (ulong)&__text_start;
+ ulong bss_end = (ulong)&__bss_end;
+ ulong dest_addr;
+
+ /*
+ * NOTE: All destination address are rounded down to 16-byte
+ * boundary to satisfy various worst-case alignment
+ * requirements
+ */
- /* Calculate destination RAM Address and relocation offset */
- dest_addr = (void *)gd->ram_size;
+ /* Global Data is at top of available memory */
+ dest_addr = gd->ram_size;
+ dest_addr -= GENERATED_GBL_DATA_SIZE;
+ dest_addr &= ~15;
+ gd->new_gd_addr = dest_addr;
+
+ /* GDT is below Global Data */
+ dest_addr -= X86_GDT_SIZE;
+ dest_addr &= ~15;
+ gd->gdt_addr = dest_addr;
+
+ /* Stack is below GDT */
+ gd->start_addr_sp = dest_addr;
+
+ /* U-Boot is below the stack */
dest_addr -= CONFIG_SYS_STACK_SIZE;
dest_addr -= (bss_end - text_start);
- rel_offset = dest_addr - text_start;
-
- gd->start_addr_sp = gd->ram_size;
- gd->relocaddr = (ulong)dest_addr;
- gd->reloc_off = rel_offset;
+ dest_addr &= ~15;
+ gd->relocaddr = dest_addr;
+ gd->reloc_off = (dest_addr - text_start);
return 0;
}
static int copy_uboot_to_ram(void)
{
- ulong *dst_addr = (ulong *)gd->relocaddr;
- ulong *src_addr = (ulong *)&__text_start;
- ulong *end_addr = (ulong *)&__data_end;
+ size_t len = (size_t)&__data_end - (size_t)&__text_start;
- while (src_addr < end_addr)
- *dst_addr++ = *src_addr++;
+ memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
return 0;
}
static int clear_bss(void)
{
- void *bss_start = &__bss_start;
- void *bss_end = &__bss_end;
+ ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
+ size_t len = (size_t)&__bss_end - (size_t)&__bss_start;
- ulong *dst_addr = (ulong *)(bss_start + gd->reloc_off);
- ulong *end_addr = (ulong *)(bss_end + gd->reloc_off);;
-
- while (dst_addr < end_addr)
- *dst_addr++ = 0x00000000;
+ memset((void *)dst_addr, 0x00, len);
return 0;
}
Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
+ Elf32_Addr *offset_ptr_rom;
+ Elf32_Addr *offset_ptr_ram;
+
+ /* The size of the region of u-boot that runs out of RAM. */
+ uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
+
do {
- if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE)
- if (*(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) >= CONFIG_SYS_TEXT_BASE)
- *(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) += gd->reloc_off;
+ /* Get the location from the relocation entry */
+ offset_ptr_rom = (Elf32_Addr *)re_src->r_offset;
+
+ /* Check that the location of the relocation is in .text */
+ if (offset_ptr_rom >= (Elf32_Addr *)CONFIG_SYS_TEXT_BASE) {
+
+ /* Switch to the in-RAM version */
+ offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
+ gd->reloc_off);
+
+ /* Check that the target points into .text */
+ if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE &&
+ *offset_ptr_ram <
+ (CONFIG_SYS_TEXT_BASE + size)) {
+ *offset_ptr_ram += gd->reloc_off;
+ }
+ }
} while (re_src++ < re_end);
return 0;
hang();
}
- gd->flags |= GD_FLG_RELOC;
+ /*
+ * SDRAM is now initialised, U-Boot has been copied into SDRAM,
+ * the BSS has been cleared etc. The final stack can now be setup
+ * in SDRAM. Code execution will continue (momentarily) in Flash,
+ * but with the stack in SDRAM and Global Data in temporary memory
+ * (CPU cache)
+ */
+ board_init_f_r_trampoline(gd->start_addr_sp);
+
+ /* NOTREACHED - board_init_f_r_trampoline() does not return */
+ while (1)
+ ;
+}
+
+void board_init_f_r(void)
+{
+ if (copy_gd_to_ram() != 0)
+ hang();
- /* Enter the relocated U-Boot! */
- relocate_code(gd->start_addr_sp, gd, gd->relocaddr);
+ if (init_cache() != 0)
+ hang();
- /* NOTREACHED - relocate_code() does not return */
- while(1);
+ copy_uboot_to_ram();
+ clear_bss();
+ do_elf_reloc_fixups();
+
+ /*
+ * Transfer execution from Flash to RAM by calculating the address
+ * of the in-RAM copy of board_init_r() and calling it
+ */
+ (board_init_r + gd->reloc_off)(gd, gd->relocaddr);
+
+ /* NOTREACHED - board_init_r() does not return */
+ while (1)
+ ;
+}
+
+static int copy_gd_to_ram(void)
+{
+ gd_t *ram_gd;
+
+ /*
+ * Global data is still in temporary memory (the CPU cache).
+ * calculate_relocation_address() has set gd->new_gd_addr to
+ * where the global data lives in RAM but getting it there
+ * safely is a bit tricky due to the 'F-Segment Hack' that
+ * we need to use for x86
+ */
+ ram_gd = (gd_t *)gd->new_gd_addr;
+ memcpy((void *)ram_gd, gd, sizeof(gd_t));
+
+ /*
+ * Reload the Global Descriptor Table so FS points to the
+ * in-RAM copy of Global Data (calculate_relocation_address()
+ * has already calculated the in-RAM location of the GDT)
+ */
+ ram_gd->gd_addr = (ulong)ram_gd;
+ init_gd(ram_gd, (u64 *)gd->gdt_addr);
+
+ return 0;
}
void board_init_r(gd_t *id, ulong dest_addr)
{
+#if defined(CONFIG_CMD_NET)
char *s;
+#endif
+#ifndef CONFIG_SYS_NO_FLASH
ulong size;
+#endif
static bd_t bd_data;
- static gd_t gd_data;
init_fnc_t **init_fnc_ptr;
show_boot_progress(0x21);
- /* Global data pointer is now writable */
- gd = &gd_data;
- memcpy(gd, id, sizeof(gd_t));
-
/* compiler optimization barrier needed for GCC >= 3.4 */
- __asm__ __volatile__("": : :"memory");
+ __asm__ __volatile__("" : : : "memory");
+
+ gd->flags |= GD_FLG_RELOC;
gd->bd = &bd_data;
- memset (gd->bd, 0, sizeof (bd_t));
+ memset(gd->bd, 0, sizeof(bd_t));
show_boot_progress(0x22);
gd->baudrate = CONFIG_BAUDRATE;
for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
if ((*init_fnc_ptr)() != 0)
- hang ();
+ hang();
}
show_boot_progress(0x23);
#ifdef CONFIG_SERIAL_MULTI
serial_initialize();
#endif
+
+#ifndef CONFIG_SYS_NO_FLASH
/* configure available FLASH banks */
size = flash_init();
display_flash_config(size);
show_boot_progress(0x24);
+#endif
show_boot_progress(0x25);
/* initialize environment */
- env_relocate ();
+ env_relocate();
show_boot_progress(0x26);
#ifdef CONFIG_CMD_NET
/* IP Address */
- bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
+ bd_data.bi_ip_addr = getenv_IPaddr("ipaddr");
#endif
#if defined(CONFIG_PCI)
show_boot_progress(0x27);
- stdio_init ();
+ stdio_init();
- jumptable_init ();
+ jumptable_init();
/* Initialize the console (after the relocation and devices init) */
console_init_r();
#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
WATCHDOG_RESET();
- puts ("PCMCIA:");
+ puts("PCMCIA:");
pcmcia_init();
#endif
show_boot_progress(0x28);
#ifdef CONFIG_STATUS_LED
- status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
+ status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
#endif
udelay(20);
/* Initialize from environment */
load_addr = getenv_ulong("loadaddr", 16, load_addr);
#if defined(CONFIG_CMD_NET)
- if ((s = getenv ("bootfile")) != NULL) {
- copy_filename (BootFile, s, sizeof (BootFile));
- }
+ s = getenv("bootfile");
+
+ if (s != NULL)
+ copy_filename(BootFile, s, sizeof(BootFile));
#endif
WATCHDOG_RESET();
eth_initialize(gd->bd);
#endif
-#if ( defined(CONFIG_CMD_NET)) && (0)
+#if (defined(CONFIG_CMD_NET)) && (0)
WATCHDOG_RESET();
# ifdef DEBUG
- puts ("Reset Ethernet PHY\n");
+ puts("Reset Ethernet PHY\n");
# endif
reset_phy();
#endif
#ifdef CONFIG_POST
- post_run (NULL, POST_RAM | post_bootmode_get(0));
+ post_run(NULL, POST_RAM | post_bootmode_get(0));
#endif
-
show_boot_progress(0x29);
/* main_loop() can return to retry autoboot, if so just run it again. */
- for (;;) {
+ for (;;)
main_loop();
- }
/* NOTREACHED - no way out of command loop except booting */
}
-void hang (void)
+void hang(void)
{
- puts ("### ERROR ### Please RESET the board ###\n");
- for (;;);
+ puts("### ERROR ### Please RESET the board ###\n");
+ for (;;)
+ ;
}
-unsigned long do_go_exec (ulong (*entry)(int, char * const []), int argc, char * const argv[])
+unsigned long do_go_exec(ulong (*entry)(int, char * const []),
+ int argc, char * const argv[])
{
unsigned long ret = 0;
char **argv_tmp;
projects / oweals / u-boot.git / blobdiff