--- /dev/null
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <malloc.h>
+#include <serial.h>
+#include <stdio_dev.h>
+#include <version.h>
+#include <net.h>
+#include <environment.h>
+#include <nand.h>
+#include <onenand_uboot.h>
+#include <spi.h>
+
+#ifdef CONFIG_BITBANGMII
+#include <miiphy.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+ulong monitor_flash_len;
+
+static char *failed = "*** failed ***\n";
+
+int __board_early_init_f(void)
+{
+ /*
+ * Nothing to do in this dummy implementation
+ */
+ return 0;
+}
+int board_early_init_f(void)
+ __attribute__((weak, alias("__board_early_init_f")));
+
+static int init_func_ram(void)
+{
+#ifdef CONFIG_BOARD_TYPES
+ int board_type = gd->board_type;
+#else
+ int board_type = 0; /* use dummy arg */
+#endif
+ puts("DRAM: ");
+
+ gd->ram_size = initdram(board_type);
+ if (gd->ram_size > 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;
+}
+
+#ifndef CONFIG_SYS_NO_FLASH
+static void display_flash_config(ulong size)
+{
+ puts("Flash: ");
+ print_size(size, "\n");
+}
+#endif
+
+static int init_baudrate(void)
+{
+ gd->baudrate = getenv_ulong("baudrate", 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[] = {
+ board_early_init_f,
+ timer_init,
+ env_init, /* initialize environment */
+ init_baudrate, /* initialize baudrate settings */
+ serial_init, /* serial communications setup */
+ console_init_f,
+ display_banner, /* say that we are here */
+ checkboard,
+ init_func_ram,
+ NULL,
+};
+
+
+void board_init_f(ulong bootflag)
+{
+ gd_t gd_data, *id;
+ bd_t *bd;
+ init_fnc_t **init_fnc_ptr;
+ ulong addr, addr_sp, len;
+ ulong *s;
+
+ /* Pointer is writable since we allocated a register for it.
+ */
+ gd = &gd_data;
+ /* compiler optimization barrier needed for GCC >= 3.4 */
+ __asm__ __volatile__("" : : : "memory");
+
+ memset((void *)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 = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
+
+ /* We can reserve some RAM "on top" here.
+ */
+
+ /* round down to next 4 kB limit.
+ */
+ addr &= ~(4096 - 1);
+ debug("Top of RAM usable for U-Boot at: %08lx\n", addr);
+
+ /* Reserve memory for U-Boot code, data & bss
+ * round down to next 16 kB limit
+ */
+ len = bss_end() - CONFIG_SYS_MONITOR_BASE;
+ addr -= len;
+ addr &= ~(16 * 1024 - 1);
+
+ debug("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
+
+ /* Reserve memory for malloc() arena.
+ */
+ addr_sp = addr - TOTAL_MALLOC_LEN;
+ debug("Reserving %dk for malloc() at: %08lx\n",
+ TOTAL_MALLOC_LEN >> 10, addr_sp);
+
+ /*
+ * (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;
+ debug("Reserving %zu Bytes for Board Info at: %08lx\n",
+ sizeof(bd_t), addr_sp);
+
+ addr_sp -= sizeof(gd_t);
+ id = (gd_t *)addr_sp;
+ debug("Reserving %zu Bytes for Global Data at: %08lx\n",
+ sizeof(gd_t), addr_sp);
+
+ /* Reserve memory for boot params.
+ */
+ addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
+ bd->bi_boot_params = addr_sp;
+ debug("Reserving %dk for boot params() at: %08lx\n",
+ CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
+
+ /*
+ * 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;
+ s = (ulong *)addr_sp;
+ *s-- = 0;
+ *s-- = 0;
+ addr_sp = (ulong)s;
+ debug("Stack Pointer at: %08lx\n", addr_sp);
+
+ /*
+ * Save local variables to board info struct
+ */
+ bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM */
+ bd->bi_memsize = gd->ram_size; /* size of DRAM in bytes */
+
+ memcpy(id, (void *)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)
+{
+#ifndef CONFIG_SYS_NO_FLASH
+ ulong size;
+#endif
+ bd_t *bd;
+
+ gd = id;
+ gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
+
+ debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
+
+ gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
+
+ monitor_flash_len = image_copy_end() - dest_addr;
+
+ serial_initialize();
+
+ bd = gd->bd;
+
+ /* The Malloc area is immediately below the monitor copy in DRAM */
+ mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
+ TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
+
+#ifndef CONFIG_SYS_NO_FLASH
+ /* configure available FLASH banks */
+ size = flash_init();
+ display_flash_config(size);
+ bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
+ bd->bi_flashsize = size;
+
+#if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
+ bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
+#else
+ bd->bi_flashoffset = 0;
+#endif
+#else
+ bd->bi_flashstart = 0;
+ bd->bi_flashsize = 0;
+ bd->bi_flashoffset = 0;
+#endif
+
+#ifdef CONFIG_CMD_NAND
+ puts("NAND: ");
+ nand_init(); /* go init the NAND */
+#endif
+
+#if defined(CONFIG_CMD_ONENAND)
+ onenand_init();
+#endif
+
+ /* relocate environment function pointers etc. */
+ env_relocate();
+
+#if defined(CONFIG_PCI)
+ /*
+ * Do pci configuration
+ */
+ pci_init();
+#endif
+
+/** leave this here (after malloc(), environment and PCI are working) **/
+ /* Initialize stdio devices */
+ stdio_init();
+
+ jumptable_init();
+
+ /* Initialize the console (after the relocation and devices init) */
+ console_init_r();
+/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
+
+ /* Initialize from environment */
+ load_addr = getenv_ulong("loadaddr", 16, load_addr);
+
+#ifdef CONFIG_CMD_SPI
+ puts("SPI: ");
+ spi_init(); /* go init the SPI */
+ puts("ready\n");
+#endif
+
+#if defined(CONFIG_MISC_INIT_R)
+ /* miscellaneous platform dependent initialisations */
+ misc_init_r();
+#endif
+
+#ifdef CONFIG_BITBANGMII
+ bb_miiphy_init();
+#endif
+#if defined(CONFIG_CMD_NET)
+ 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 */
+}
Code Review / kvmfornfv.git / blobdiff