--- /dev/null
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * (C) Copyright 2002-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <linux/compiler.h>
+#include <version.h>
+#include <environment.h>
+#include <fdtdec.h>
+#include <initcall.h>
+#include <logbuff.h>
+#include <post.h>
+#include <asm/io.h>
+#include <asm/sections.h>
+#include <linux/compiler.h>
+
+/*
+ * Pointer to initial global data area
+ *
+ * Here we initialize it if needed.
+ */
+#ifdef XTRN_DECLARE_GLOBAL_DATA_PTR
+#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);
+#else
+DECLARE_GLOBAL_DATA_PTR;
+#endif
+
+/*
+ * sjg: IMO this code should be
+ * refactored to a single function, something like:
+ *
+ * void led_set_state(enum led_colour_t colour, int on);
+ */
+/************************************************************************
+ * Coloured LED functionality
+ ************************************************************************
+ * May be supplied by boards if desired
+ */
+inline void __coloured_LED_init(void) {}
+void coloured_LED_init(void)
+ __attribute__((weak, alias("__coloured_LED_init")));
+inline void __red_led_on(void) {}
+void red_led_on(void) __attribute__((weak, alias("__red_led_on")));
+inline void __red_led_off(void) {}
+void red_led_off(void) __attribute__((weak, alias("__red_led_off")));
+inline void __green_led_on(void) {}
+void green_led_on(void) __attribute__((weak, alias("__green_led_on")));
+inline void __green_led_off(void) {}
+void green_led_off(void) __attribute__((weak, alias("__green_led_off")));
+inline void __yellow_led_on(void) {}
+void yellow_led_on(void) __attribute__((weak, alias("__yellow_led_on")));
+inline void __yellow_led_off(void) {}
+void yellow_led_off(void) __attribute__((weak, alias("__yellow_led_off")));
+inline void __blue_led_on(void) {}
+void blue_led_on(void) __attribute__((weak, alias("__blue_led_on")));
+inline void __blue_led_off(void) {}
+void blue_led_off(void) __attribute__((weak, alias("__blue_led_off")));
+
+/*
+ * Why is gd allocated a register? Prior to reloc it might be better to
+ * just pass it around to each function in this file?
+ *
+ * After reloc one could argue that it is hardly used and doesn't need
+ * to be in a register. Or if it is it should perhaps hold pointers to all
+ * global data for all modules, so that post-reloc we can avoid the massive
+ * literal pool we get on ARM. Or perhaps just encourage each module to use
+ * a structure...
+ */
+
+/*
+ * Could the CONFIG_SPL_BUILD infection become a flag in gd?
+ */
+
+static int init_baud_rate(void)
+{
+ gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
+ return 0;
+}
+
+static int display_text_info(void)
+{
+ ulong bss_start, bss_end;
+
+ bss_start = _bss_start_ofs + _TEXT_BASE;
+ bss_end = _bss_end_ofs + _TEXT_BASE;
+ debug("U-Boot code: %08X -> %08lX BSS: -> %08lX\n",
+ CONFIG_SYS_TEXT_BASE, bss_start, bss_end);
+
+#ifdef CONFIG_MODEM_SUPPORT
+ debug("Modem Support enabled\n");
+#endif
+#ifdef CONFIG_USE_IRQ
+ debug("IRQ Stack: %08lx\n", IRQ_STACK_START);
+ debug("FIQ Stack: %08lx\n", FIQ_STACK_START);
+#endif
+
+ return 0;
+}
+
+static int announce_dram_init(void)
+{
+ puts("DRAM: ");
+ return 0;
+}
+
+static int show_dram_config(void)
+{
+ ulong size;
+
+#ifdef CONFIG_NR_DRAM_BANKS
+ int i;
+
+ debug("\nRAM Configuration:\n");
+ for (i = size = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+ size += gd->bd->bi_dram[i].size;
+ debug("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
+#ifdef DEBUG
+ print_size(gd->bd->bi_dram[i].size, "\n");
+#endif
+ }
+ debug("\nDRAM: ");
+#else
+ size = gd->ram_size;
+#endif
+
+ print_size(size, "\n");
+
+ return 0;
+}
+
+void __dram_init_banksize(void)
+{
+#if defined(CONFIG_NR_DRAM_BANKS) && defined(CONFIG_SYS_SDRAM_BASE)
+ gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+ gd->bd->bi_dram[0].size = get_effective_memsize();
+#endif
+}
+
+void dram_init_banksize(void)
+ __attribute__((weak, alias("__dram_init_banksize")));
+
+static int zero_global_data(void)
+{
+ memset((void *)gd, '\0', sizeof(gd_t));
+
+ return 0;
+}
+
+static int setup_mon_len(void)
+{
+ gd->mon_len = _bss_end_ofs;
+ return 0;
+}
+
+__weak int arch_cpu_init(void)
+{
+ return 0;
+}
+
+static int setup_fdt(void)
+{
+#ifdef CONFIG_OF_EMBED
+ /* Get a pointer to the FDT */
+ gd->fdt_blob = _binary_dt_dtb_start;
+#elif defined CONFIG_OF_SEPARATE
+ /* FDT is at end of image */
+ gd->fdt_blob = (void *)(_end_ofs + CONFIG_SYS_TEXT_BASE);
+#endif
+ /* Allow the early environment to override the fdt address */
+ gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
+ (uintptr_t)gd->fdt_blob);
+ return 0;
+}
+
+/* Get the top of usable RAM */
+__weak ulong board_get_usable_ram_top(ulong total_size)
+{
+ return gd->ram_top;
+}
+
+static int setup_dest_addr(void)
+{
+ debug("Monitor len: %08lX\n", gd->mon_len);
+ /*
+ * Ram is setup, size stored in gd !!
+ */
+ debug("Ram size: %08lX\n", (ulong)gd->ram_size);
+#if defined(CONFIG_SYS_MEM_TOP_HIDE)
+ /*
+ * Subtract specified amount of memory to hide so that it won't
+ * get "touched" at all by U-Boot. By fixing up gd->ram_size
+ * the Linux kernel should now get passed the now "corrected"
+ * memory size and won't touch it either. This should work
+ * for arch/ppc and arch/powerpc. Only Linux board ports in
+ * arch/powerpc with bootwrapper support, that recalculate the
+ * memory size from the SDRAM controller setup will have to
+ * get fixed.
+ */
+ gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
+#endif
+#ifdef CONFIG_SYS_SDRAM_BASE
+ gd->ram_top = CONFIG_SYS_SDRAM_BASE;
+#endif
+ gd->ram_top = board_get_usable_ram_top(gd->mon_len);
+ gd->dest_addr = gd->ram_top;
+ debug("Ram top: %08lX\n", (ulong)gd->ram_top);
+ gd->dest_addr_sp = gd->dest_addr;
+ return 0;
+}
+
+#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
+static int reserve_logbuffer(void)
+{
+ /* reserve kernel log buffer */
+ gd->dest_addr -= LOGBUFF_RESERVE;
+ debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN,
+ gd->dest_addr);
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PRAM
+/* reserve protected RAM */
+static int reserve_pram(void)
+{
+ ulong reg;
+
+ reg = getenv_ulong("pram", 10, CONFIG_PRAM);
+ gd->dest_addr -= (reg << 10); /* size is in kB */
+ debug("Reserving %ldk for protected RAM at %08lx\n", reg,
+ gd->dest_addr);
+ return 0;
+}
+#endif /* CONFIG_PRAM */
+
+/* Round memory pointer down to next 4 kB limit */
+static int reserve_round_4k(void)
+{
+ gd->dest_addr &= ~(4096 - 1);
+ return 0;
+}
+
+#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \
+ defined(CONFIG_ARM)
+static int reserve_mmu(void)
+{
+ /* reserve TLB table */
+ gd->arch.tlb_size = 4096 * 4;
+ gd->dest_addr -= gd->arch.tlb_size;
+
+ /* round down to next 64 kB limit */
+ gd->dest_addr &= ~(0x10000 - 1);
+
+ gd->arch.tlb_addr = gd->dest_addr;
+ debug("TLB table from %08lx to %08lx\n", gd->arch.tlb_addr,
+ gd->arch.tlb_addr + gd->arch.tlb_size);
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_LCD
+static int reserve_lcd(void)
+{
+#ifdef CONFIG_FB_ADDR
+ gd->fb_base = CONFIG_FB_ADDR;
+#else
+ /* reserve memory for LCD display (always full pages) */
+ gd->dest_addr = lcd_setmem(gd->dest_addr);
+ gd->fb_base = gd->dest_addr;
+#endif /* CONFIG_FB_ADDR */
+ return 0;
+}
+#endif /* CONFIG_LCD */
+
+static int reserve_uboot(void)
+{
+ /*
+ * reserve memory for U-Boot code, data & bss
+ * round down to next 4 kB limit
+ */
+ gd->dest_addr -= gd->mon_len;
+ gd->dest_addr &= ~(4096 - 1);
+
+ debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10,
+ gd->dest_addr);
+ return 0;
+}
+
+/* reserve memory for malloc() area */
+static int reserve_malloc(void)
+{
+ gd->dest_addr_sp = gd->dest_addr - TOTAL_MALLOC_LEN;
+ debug("Reserving %dk for malloc() at: %08lx\n",
+ TOTAL_MALLOC_LEN >> 10, gd->dest_addr_sp);
+ return 0;
+}
+
+/* (permanently) allocate a Board Info struct */
+static int reserve_board(void)
+{
+ gd->dest_addr_sp -= sizeof(bd_t);
+ gd->bd = (bd_t *)gd->dest_addr_sp;
+ memset(gd->bd, '\0', sizeof(bd_t));
+ debug("Reserving %zu Bytes for Board Info at: %08lx\n",
+ sizeof(bd_t), gd->dest_addr_sp);
+ return 0;
+}
+
+static int setup_machine(void)
+{
+#ifdef CONFIG_MACH_TYPE
+ gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
+#endif
+ return 0;
+}
+
+static int reserve_global_data(void)
+{
+ gd->dest_addr_sp -= sizeof(gd_t);
+ gd->new_gd = (gd_t *)gd->dest_addr_sp;
+ debug("Reserving %zu Bytes for Global Data at: %08lx\n",
+ sizeof(gd_t), gd->dest_addr_sp);
+ return 0;
+}
+
+static int reserve_fdt(void)
+{
+ /*
+ * If the device tree is sitting immediate above our image then we
+ * must relocate it. If it is embedded in the data section, then it
+ * will be relocated with other data.
+ */
+ if (gd->fdt_blob) {
+ gd->fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
+
+ gd->dest_addr_sp -= gd->fdt_size;
+ gd->new_fdt = (void *)gd->dest_addr_sp;
+ debug("Reserving %lu Bytes for FDT at: %p\n",
+ gd->fdt_size, gd->new_fdt);
+ }
+
+ return 0;
+}
+
+static int reserve_stacks(void)
+{
+ /* setup stack pointer for exceptions */
+ gd->dest_addr_sp -= 16;
+ gd->dest_addr_sp &= ~0xf;
+ gd->irq_sp = gd->dest_addr_sp;
+
+ /*
+ * Handle architecture-specific things here
+ * TODO(sjg@chromium.org): Perhaps create arch_reserve_stack()
+ * to handle this and put in arch/xxx/lib/stack.c
+ */
+# ifdef CONFIG_ARM
+# ifdef CONFIG_USE_IRQ
+ gd->dest_addr_sp -= (CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ);
+ debug("Reserving %zu Bytes for IRQ stack at: %08lx\n",
+ CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ, gd->dest_addr_sp);
+
+ /* 8-byte alignment for ARM ABI compliance */
+ gd->dest_addr_sp &= ~0x07;
+# endif
+ /* leave 3 words for abort-stack, plus 1 for alignment */
+ gd->dest_addr_sp -= 16;
+
+ return 0;
+}
+
+static int display_new_sp(void)
+{
+ debug("New Stack Pointer is: %08lx\n", gd->dest_addr_sp);
+
+ return 0;
+}
+
+#ifdef CONFIG_POST
+static int init_post(void)
+{
+ post_bootmode_init();
+ post_run(NULL, POST_ROM | post_bootmode_get(0));
+
+ return 0;
+}
+#endif
+
+static int setup_baud_rate(void)
+{
+ /* Ick, can we get rid of this line? */
+ gd->bd->bi_baudrate = gd->baudrate;
+
+ return 0;
+}
+
+static int setup_dram_config(void)
+{
+ /* Ram is board specific, so move it to board code ... */
+ dram_init_banksize();
+
+ return 0;
+}
+
+static int reloc_fdt(void)
+{
+ if (gd->new_fdt) {
+ memcpy(gd->new_fdt, gd->fdt_blob, gd->fdt_size);
+ gd->fdt_blob = gd->new_fdt;
+ }
+
+ return 0;
+}
+
+static int setup_reloc(void)
+{
+ gd->relocaddr = gd->dest_addr;
+ gd->start_addr_sp = gd->dest_addr_sp;
+ gd->reloc_off = gd->dest_addr - CONFIG_SYS_TEXT_BASE;
+ memcpy(gd->new_gd, (char *)gd, sizeof(gd_t));
+
+ debug("Relocation Offset is: %08lx\n", gd->reloc_off);
+ debug("Relocating to %08lx, new gd at %p, sp at %08lx\n",
+ gd->dest_addr, gd->new_gd, gd->dest_addr_sp);
+
+ return 0;
+}
+
+/* ARM calls relocate_code from its crt0.S */
+#if !defined(CONFIG_ARM)
+
+static int jump_to_copy(void)
+{
+ relocate_code(gd->dest_addr_sp, gd->new_gd, gd->dest_addr);
+
+ return 0;
+}
+#endif
+
+/* Record the board_init_f() bootstage (after arch_cpu_init()) */
+static int mark_bootstage(void)
+{
+ bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");
+
+ return 0;
+}
+
+static init_fnc_t init_sequence_f[] = {
+ setup_fdt,
+ setup_mon_len,
+ arch_cpu_init, /* basic arch cpu dependent setup */
+ mark_bootstage,
+#ifdef CONFIG_OF_CONTROL
+ fdtdec_check_fdt,
+#endif
+#if defined(CONFIG_BOARD_EARLY_INIT_F)
+ board_early_init_f,
+#endif
+ timer_init, /* initialize timer */
+#ifdef CONFIG_BOARD_POSTCLK_INIT
+ board_postclk_init,
+#endif
+#ifdef CONFIG_FSL_ESDHC
+ get_clocks,
+#endif
+ env_init, /* initialize environment */
+ init_baud_rate, /* initialze baudrate settings */
+ serial_init, /* serial communications setup */
+ console_init_f, /* stage 1 init of console */
+ display_options, /* say that we are here */
+ display_text_info, /* show debugging info if required */
+#if defined(CONFIG_DISPLAY_CPUINFO)
+ print_cpuinfo, /* display cpu info (and speed) */
+#endif
+#if defined(CONFIG_DISPLAY_BOARDINFO)
+ checkboard, /* display board info */
+#endif
+ announce_dram_init,
+ /* TODO: unify all these dram functions? */
+#ifdef CONFIG_ARM
+ dram_init, /* configure available RAM banks */
+#endif
+#ifdef CONFIG_POST
+ init_post,
+#endif
+ /*
+ * Now that we have DRAM mapped and working, we can
+ * relocate the code and continue running from DRAM.
+ *
+ * Reserve memory at end of RAM for (top down in that order):
+ * - area that won't get touched by U-Boot and Linux (optional)
+ * - kernel log buffer
+ * - protected RAM
+ * - LCD framebuffer
+ * - monitor code
+ * - board info struct
+ */
+ setup_dest_addr,
+#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR)
+ reserve_logbuffer,
+#endif
+#ifdef CONFIG_PRAM
+ reserve_pram,
+#endif
+ reserve_round_4k,
+#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) && \
+ defined(CONFIG_ARM)
+ reserve_mmu,
+#endif
+#ifdef CONFIG_LCD
+ reserve_lcd,
+#endif
+ reserve_uboot,
+ reserve_malloc,
+ reserve_board,
+ setup_machine,
+ reserve_global_data,
+ reserve_fdt,
+ reserve_stacks,
+ setup_dram_config,
+ show_dram_config,
+ setup_baud_rate,
+ display_new_sp,
+ reloc_fdt,
+ setup_reloc,
+#ifndef CONFIG_ARM
+ jump_to_copy,
+#endif
+ NULL,
+};
+
+void board_init_f(ulong boot_flags)
+{
+ gd_t data;
+
+ gd = &data;
+
+ gd->flags = boot_flags;
+
+ if (initcall_run_list(init_sequence_f))
+ hang();
+
+#ifndef CONFIG_ARM
+ /* NOTREACHED - jump_to_copy() does not return */
+ hang();
+#endif
+}
+
+void hang(void)
+{
+ puts("### ERROR ### Please RESET the board ###\n");
+ for (;;);
+}
projects / u-boot.git / commitdiff