#include <common.h>
#include <watchdog.h>
-#include <command.h>
#include <stdio_dev.h>
-#include <version.h>
-#include <malloc.h>
-#include <net.h>
-#include <ide.h>
-#include <serial.h>
#include <asm/u-boot-x86.h>
-#include <elf.h>
+#include <asm/relocate.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);
-
-/************************************************************************
- * 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)
-{
- gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
- return 0;
-}
-
-static int display_banner(void)
-{
-
- printf("\n\n%s\n\n", version_string);
-
- return 0;
-}
-
-static int display_dram_config(void)
-{
- 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");
-}
+#include <asm/init_helpers.h>
+#include <asm/init_wrappers.h>
/*
* Breath some life into the board...
*
- * Initialize an SMC for serial comms, and carry out some hardware
- * tests.
+ * Getting the board up and running is a three-stage process:
+ * 1) Execute from Flash, SDRAM Uninitialised
+ * At this point, there is a limited amount of non-SDRAM memory
+ * (typically the CPU cache, but can also be SRAM or even a buffer of
+ * of some peripheral). This limited memory is used to hold:
+ * - The initial copy of the Global Data Structure
+ * - A temporary stack
+ * - A temporary x86 Global Descriptor Table
+ * - The pre-console buffer (if enabled)
+ *
+ * The following is performed during this phase of execution:
+ * - Core low-level CPU initialisation
+ * - Console initialisation
+ * - SDRAM initialisation
+ *
+ * 2) Execute from Flash, SDRAM Initialised
+ * At this point we copy Global Data from the initial non-SDRAM
+ * memory and set up the permanent stack in SDRAM. The CPU cache is no
+ * longer being used as temporary memory, so we can now fully enable
+ * it.
+ *
+ * The following is performed during this phase of execution:
+ * - Create final stack in SDRAM
+ * - Copy Global Data from temporary memory to SDRAM
+ * - Enabling of CPU cache(s),
+ * - Copying of U-Boot code and data from Flash to RAM
+ * - Clearing of the BSS
+ * - ELF relocation adjustments
*
- * 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.
+ * 3) Execute from SDRAM
+ * The following is performed during this phase of execution:
+ * - All remaining initialisation
*/
/*
- * 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".
+ * The requirements for any new initalization function is simple: it is
+ * a function with no parameters which returns an integer return code,
+ * where 0 means "continue" and != 0 means "fatal error, hang the system"
*/
typedef int (init_fnc_t) (void);
-static int calculate_relocation_address(void);
-static int copy_uboot_to_ram(void);
-static int clear_bss(void);
-static int do_elf_reloc_fixups(void);
-
+/*
+ * init_sequence_f is the list of init functions which are run when U-Boot
+ * is executing from Flash with a limited 'C' environment. The following
+ * limitations must be considered when implementing an '_f' function:
+ * - 'static' variables are read-only
+ * - Global Data (gd->xxx) is read/write
+ * - Stack space is limited
+ *
+ * The '_f' sequence must, as a minimum, initialise SDRAM. It _should_
+ * also initialise the console (to provide early debug output)
+ */
init_fnc_t *init_sequence_f[] = {
cpu_init_f,
board_early_init_f,
+#ifdef CONFIG_OF_CONTROL
+ find_fdt,
+ fdtdec_check_fdt,
+#endif
env_init,
- init_baudrate,
+ init_baudrate_f,
serial_init,
console_init_f,
+#ifdef CONFIG_OF_CONTROL
+ prepare_fdt,
+#endif
dram_init_f,
calculate_relocation_address,
+
+ NULL,
+};
+
+/*
+ * init_sequence_f_r is the list of init functions which are run when
+ * U-Boot is executing from Flash with a semi-limited 'C' environment.
+ * The following limitations must be considered when implementing an
+ * '_f_r' function:
+ * - 'static' variables are read-only
+ * - Global Data (gd->xxx) is read/write
+ *
+ * The '_f_r' sequence must, as a minimum, copy U-Boot to RAM (if
+ * supported). It _should_, if possible, copy global data to RAM and
+ * initialise the CPU caches (to speed up the relocation process)
+ */
+init_fnc_t *init_sequence_f_r[] = {
+ init_cache_f_r,
copy_uboot_to_ram,
clear_bss,
do_elf_reloc_fixups,
NULL,
};
+/*
+ * init_sequence_r is the list of init functions which are run when U-Boot
+ * is executing from RAM with a full 'C' environment. There are no longer
+ * any limitations which must be considered when implementing an '_r'
+ * function, (i.e.'static' variables are read/write)
+ *
+ * If not already done, the '_r' sequence must copy global data to RAM and
+ * (should) initialise the CPU caches.
+ */
init_fnc_t *init_sequence_r[] = {
- cpu_init_r, /* basic cpu dependent setup */
- board_early_init_r, /* basic board dependent setup */
- dram_init, /* configure available RAM banks */
- interrupt_init, /* set up exceptions */
+ set_reloc_flag_r,
+ init_bd_struct_r,
+ mem_malloc_init_r,
+ cpu_init_r,
+ board_early_init_r,
+ dram_init,
+ interrupt_init,
timer_init,
display_banner,
display_dram_config,
-
- 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;
-
- /* Calculate destination RAM Address and relocation offset */
- dest_addr = (void *)gd->ram_size;
- 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;
-
- 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;
-
- while (src_addr < end_addr)
- *dst_addr++ = *src_addr++;
-
- 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);
- ulong *end_addr = (ulong *)(bss_end + gd->reloc_off);
-
- while (dst_addr < end_addr)
- *dst_addr++ = 0x00000000;
-
- return 0;
-}
-
-static int do_elf_reloc_fixups(void)
-{
- 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;
-
- do {
- /* 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 = offset_ptr_rom + gd->reloc_off;
-
- /* Check that the target points into .text */
- if (*offset_ptr_ram >= CONFIG_SYS_TEXT_BASE)
- *offset_ptr_ram += gd->reloc_off;
- }
- } while (re_src++ < re_end);
-
- return 0;
-}
-
-/* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */
-void board_init_f(ulong boot_flags)
-{
- init_fnc_t **init_fnc_ptr;
-
- gd->flags = boot_flags;
-
- for (init_fnc_ptr = init_sequence_f; *init_fnc_ptr; ++init_fnc_ptr) {
- if ((*init_fnc_ptr)() != 0)
- hang();
- }
-
- gd->flags |= GD_FLG_RELOC;
-
- /* Enter the relocated U-Boot! */
- relocate_code(gd->start_addr_sp, gd, gd->relocaddr);
-
- /* NOTREACHED - relocate_code() does not return */
- while (1)
- ;
-}
-
-void board_init_r(gd_t *id, ulong dest_addr)
-{
- char *s;
- ulong size;
- 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");
-
- gd->bd = &bd_data;
- memset(gd->bd, 0, sizeof(bd_t));
- show_boot_progress(0x22);
-
- gd->baudrate = CONFIG_BAUDRATE;
-
- mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
- CONFIG_SYS_MALLOC_LEN);
-
- for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
- if ((*init_fnc_ptr)() != 0)
- hang();
- }
- show_boot_progress(0x23);
-
-#ifdef CONFIG_SERIAL_MULTI
- serial_initialize();
+ serial_initialize_r,
+#ifndef CONFIG_SYS_NO_FLASH
+ flash_init_r,
#endif
- /* configure available FLASH banks */
- size = flash_init();
- display_flash_config(size);
- show_boot_progress(0x24);
-
- show_boot_progress(0x25);
-
- /* initialize environment */
- env_relocate();
- show_boot_progress(0x26);
-
-
-#ifdef CONFIG_CMD_NET
- /* IP Address */
- bd_data.bi_ip_addr = getenv_IPaddr("ipaddr");
+#ifdef CONFIG_SPI
+ init_func_spi;
#endif
-
-#if defined(CONFIG_PCI)
- /*
- * Do pci configuration
- */
- pci_init();
+ env_relocate_r,
+#ifdef CONFIG_PCI
+ pci_init_r,
#endif
-
- show_boot_progress(0x27);
-
-
- stdio_init();
-
- jumptable_init();
-
- /* Initialize the console (after the relocation and devices init) */
- console_init_r();
-
+ stdio_init,
+ jumptable_init_r,
+ console_init_r,
#ifdef CONFIG_MISC_INIT_R
- /* miscellaneous platform dependent initialisations */
- misc_init_r();
-#endif
-
-#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
- WATCHDOG_RESET();
- puts("PCMCIA:");
- pcmcia_init();
+ misc_init_r,
#endif
-
#if defined(CONFIG_CMD_KGDB)
- WATCHDOG_RESET();
- puts("KGDB: ");
- kgdb_init();
+ kgdb_init_r,
#endif
-
- /* enable exceptions */
- enable_interrupts();
- show_boot_progress(0x28);
-
+ enable_interrupts_r,
#ifdef CONFIG_STATUS_LED
- 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)
- s = getenv("bootfile");
-
- if (s != NULL)
- copy_filename(BootFile, s, sizeof(BootFile));
+ status_led_set_r,
#endif
-
- WATCHDOG_RESET();
-
+ set_load_addr_r,
#if defined(CONFIG_CMD_IDE)
- WATCHDOG_RESET();
- puts("IDE: ");
- ide_init();
+ ide_init_r,
#endif
-
#if defined(CONFIG_CMD_SCSI)
- WATCHDOG_RESET();
- puts("SCSI: ");
- scsi_init();
+ scsi_init_r,
#endif
-
#if defined(CONFIG_CMD_DOC)
- WATCHDOG_RESET();
- puts("DOC: ");
- doc_init();
+ doc_init_r,
#endif
-
#ifdef CONFIG_BITBANGMII
- bb_miiphy_init();
+ bb_miiphy_init_r,
#endif
#if defined(CONFIG_CMD_NET)
- WATCHDOG_RESET();
- puts("Net: ");
- eth_initialize(gd->bd);
+ eth_initialize_r,
+#ifdef CONFIG_RESET_PHY_R
+ reset_phy_r,
#endif
-
-#if (defined(CONFIG_CMD_NET)) && (0)
- WATCHDOG_RESET();
-# ifdef DEBUG
- puts("Reset Ethernet PHY\n");
-# endif
- reset_phy();
#endif
-
#ifdef CONFIG_LAST_STAGE_INIT
- WATCHDOG_RESET();
- /*
- * Some parts can be only initialized if all others (like
- * Interrupts) are up and running (i.e. the PC-style ISA
- * keyboard).
- */
- last_stage_init();
+ last_stage_init,
#endif
+ NULL,
+};
+static void do_init_loop(init_fnc_t **init_fnc_ptr)
+{
+ for (; *init_fnc_ptr; ++init_fnc_ptr) {
+ WATCHDOG_RESET();
+ if ((*init_fnc_ptr)() != 0)
+ hang();
+ }
+}
-#ifdef CONFIG_POST
- post_run(NULL, POST_RAM | post_bootmode_get(0));
-#endif
-
- show_boot_progress(0x29);
+void board_init_f(ulong boot_flags)
+{
+ gd->flags = boot_flags;
- /* main_loop() can return to retry autoboot, if so just run it again. */
- for (;;)
- main_loop();
+ do_init_loop(init_sequence_f);
- /* NOTREACHED - no way out of command loop except booting */
-}
+ /*
+ * SDRAM and console are now initialised. The final stack can now
+ * be setup in SDRAM. Code execution will continue 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);
-void hang(void)
-{
- puts("### ERROR ### Please RESET the board ###\n");
- for (;;)
+ /* NOTREACHED - board_init_f_r_trampoline() does not return */
+ while (1)
;
}
-unsigned long do_go_exec(ulong (*entry)(int, char * const []),
- int argc, char * const argv[])
+void board_init_f_r(void)
{
- unsigned long ret = 0;
- char **argv_tmp;
+ do_init_loop(init_sequence_f_r);
/*
- * x86 does not use a dedicated register to pass the pointer to
- * the global_data, so it is instead passed as argv[-1]. By using
- * argv[-1], the called 'Application' can use the contents of
- * argv natively. However, to safely use argv[-1] a new copy of
- * argv is needed with the extra element
+ * U-Boot has been copied into SDRAM, the BSS has been cleared etc.
+ * Transfer execution from Flash to RAM by calculating the address
+ * of the in-RAM copy of board_init_r() and calling it
*/
- argv_tmp = malloc(sizeof(char *) * (argc + 1));
+ (board_init_r + gd->reloc_off)(gd, gd->relocaddr);
- if (argv_tmp) {
- argv_tmp[0] = (char *)gd;
+ /* NOTREACHED - board_init_r() does not return */
+ while (1)
+ ;
+}
- memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
+void board_init_r(gd_t *id, ulong dest_addr)
+{
+ do_init_loop(init_sequence_r);
- ret = (entry) (argc, &argv_tmp[1]);
- free(argv_tmp);
- }
+ /* main_loop() can return to retry autoboot, if so just run it again. */
+ for (;;)
+ main_loop();
- return ret;
+ /* NOTREACHED - no way out of command loop except booting */
}
-void setup_pcat_compatibility(void)
- __attribute__((weak, alias("__setup_pcat_compatibility")));
-
-void __setup_pcat_compatibility(void)
+void hang(void)
{
+ puts("### ERROR ### Please RESET the board ###\n");
+ for (;;)
+ ;
}
projects / u-boot / blobdiff