diff options
Diffstat (limited to 'arch/x86/lib/board.c')
| -rw-r--r-- | arch/x86/lib/board.c | 517 |
1 files changed, 152 insertions, 365 deletions
diff --git a/arch/x86/lib/board.c b/arch/x86/lib/board.c index d742fec..5f0b62c 100644 --- a/arch/x86/lib/board.c +++ b/arch/x86/lib/board.c @@ -33,111 +33,96 @@ #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> -#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; -} - -#ifndef CONFIG_SYS_NO_FLASH -static void display_flash_config(ulong size) -{ - puts("Flash: "); - print_size(size, "\n"); -} -#endif +#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 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. + * 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 + * + * 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, env_init, - init_baudrate, + init_baudrate_f, serial_init, console_init_f, 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[] = { + copy_gd_to_ram_f_r, + init_cache_f_r, copy_uboot_to_ram, clear_bss, do_elf_reloc_fixups, @@ -145,339 +130,141 @@ init_fnc_t *init_sequence_f[] = { 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) -{ - ulong text_start = (ulong)&__text_start; - ulong bss_end = (ulong)&__bss_end; - ulong dest_addr; - ulong rel_offset; - - /* Calculate destination RAM Address and relocation offset */ - dest_addr = gd->ram_size; - dest_addr -= CONFIG_SYS_STACK_SIZE; - dest_addr -= (bss_end - text_start); - - /* - * Round destination address down to 16-byte boundary to keep - * IDT and GDT 16-byte aligned - */ - dest_addr &= ~15; - - rel_offset = dest_addr - text_start; - - gd->start_addr_sp = gd->ram_size; - gd->relocaddr = 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; - - /* 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 { - /* 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; -} - -/* 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) -{ -#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"); - - 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, #endif - #ifndef CONFIG_SYS_NO_FLASH - /* configure available FLASH banks */ - size = flash_init(); - display_flash_config(size); - show_boot_progress(0x24); + flash_init_r, #endif - - show_boot_progress(0x25); - - /* initialize environment */ - env_relocate(); - show_boot_progress(0x26); - - + env_relocate_r, #ifdef CONFIG_CMD_NET - /* IP Address */ - bd_data.bi_ip_addr = getenv_IPaddr("ipaddr"); + init_ip_address_r, #endif - -#if defined(CONFIG_PCI) - /* - * Do pci configuration - */ - pci_init(); +#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(); + misc_init_r, #endif - #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE) - WATCHDOG_RESET(); - puts("PCMCIA:"); - pcmcia_init(); + pci_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); + status_led_set_r, #endif - - udelay(20); - - /* Initialize from environment */ - load_addr = getenv_ulong("loadaddr", 16, load_addr); + set_load_addr_r, #if defined(CONFIG_CMD_NET) - s = getenv("bootfile"); - - if (s != NULL) - copy_filename(BootFile, s, sizeof(BootFile)); + set_bootfile_r, #endif - - WATCHDOG_RESET(); - #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 (;;) + ; } |