u-boot/common/spl/spl.c
Vikas Manocha 5bf5250e9d spl: make image arg or fdt blob address reconfigurable
At present fdt blob or argument address being passed to kernel is fixed at
compile time using macro CONFIG_SYS_SPL_ARGS_ADDR. FDT blob from
different media like nand, nor flash are copied to the address pointed
by the macro.
The problem is, it makes args/fdt blob compulsory to copy which is not required
in cases like for NOR Flash. This patch removes this limitation.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
2017-05-08 11:38:40 -04:00

448 lines
11 KiB
C

/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <spl.h>
#include <asm/u-boot.h>
#include <nand.h>
#include <fat.h>
#include <version.h>
#include <image.h>
#include <malloc.h>
#include <dm/root.h>
#include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SYS_UBOOT_START
#define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE
#endif
#ifndef CONFIG_SYS_MONITOR_LEN
/* Unknown U-Boot size, let's assume it will not be more than 200 KB */
#define CONFIG_SYS_MONITOR_LEN (200 * 1024)
#endif
u32 *boot_params_ptr = NULL;
/* Define board data structure */
static bd_t bdata __attribute__ ((section(".data")));
/*
* Board-specific Platform code can reimplement show_boot_progress () if needed
*/
__weak void show_boot_progress(int val) {}
/*
* Default function to determine if u-boot or the OS should
* be started. This implementation always returns 1.
*
* Please implement your own board specific funcion to do this.
*
* RETURN
* 0 to not start u-boot
* positive if u-boot should start
*/
#ifdef CONFIG_SPL_OS_BOOT
__weak int spl_start_uboot(void)
{
puts("SPL: Please implement spl_start_uboot() for your board\n");
puts("SPL: Direct Linux boot not active!\n");
return 1;
}
/*
* Weak default function for arch specific zImage check. Return zero
* and fill start and end address if image is recognized.
*/
int __weak bootz_setup(ulong image, ulong *start, ulong *end)
{
return 1;
}
#endif
/*
* Weak default function for board specific cleanup/preparation before
* Linux boot. Some boards/platforms might not need it, so just provide
* an empty stub here.
*/
__weak void spl_board_prepare_for_linux(void)
{
/* Nothing to do! */
}
__weak void spl_board_prepare_for_boot(void)
{
/* Nothing to do! */
}
void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
{
spl_image->size = CONFIG_SYS_MONITOR_LEN;
spl_image->entry_point = CONFIG_SYS_UBOOT_START;
#ifdef CONFIG_CPU_V7M
spl_image->entry_point |= 0x1;
#endif
spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
spl_image->os = IH_OS_U_BOOT;
spl_image->name = "U-Boot";
}
int spl_parse_image_header(struct spl_image_info *spl_image,
const struct image_header *header)
{
if (image_get_magic(header) == IH_MAGIC) {
#ifdef CONFIG_SPL_LEGACY_IMAGE_SUPPORT
u32 header_size = sizeof(struct image_header);
if (spl_image->flags & SPL_COPY_PAYLOAD_ONLY) {
/*
* On some system (e.g. powerpc), the load-address and
* entry-point is located at address 0. We can't load
* to 0-0x40. So skip header in this case.
*/
spl_image->load_addr = image_get_load(header);
spl_image->entry_point = image_get_ep(header);
spl_image->size = image_get_data_size(header);
} else {
spl_image->entry_point = image_get_load(header);
/* Load including the header */
spl_image->load_addr = spl_image->entry_point -
header_size;
spl_image->size = image_get_data_size(header) +
header_size;
}
spl_image->os = image_get_os(header);
spl_image->name = image_get_name(header);
debug("spl: payload image: %.*s load addr: 0x%lx size: %d\n",
(int)sizeof(spl_image->name), spl_image->name,
spl_image->load_addr, spl_image->size);
#else
/* LEGACY image not supported */
debug("Legacy boot image support not enabled, proceeding to other boot methods");
return -EINVAL;
#endif
} else {
#ifdef CONFIG_SPL_PANIC_ON_RAW_IMAGE
/*
* CONFIG_SPL_PANIC_ON_RAW_IMAGE is defined when the
* code which loads images in SPL cannot guarantee that
* absolutely all read errors will be reported.
* An example is the LPC32XX MLC NAND driver, which
* will consider that a completely unreadable NAND block
* is bad, and thus should be skipped silently.
*/
panic("** no mkimage signature but raw image not supported");
#endif
#ifdef CONFIG_SPL_OS_BOOT
ulong start, end;
if (!bootz_setup((ulong)header, &start, &end)) {
spl_image->name = "Linux";
spl_image->os = IH_OS_LINUX;
spl_image->load_addr = CONFIG_SYS_LOAD_ADDR;
spl_image->entry_point = CONFIG_SYS_LOAD_ADDR;
spl_image->size = end - start;
debug("spl: payload zImage, load addr: 0x%lx size: %d\n",
spl_image->load_addr, spl_image->size);
return 0;
}
#endif
#ifdef CONFIG_SPL_RAW_IMAGE_SUPPORT
/* Signature not found - assume u-boot.bin */
debug("mkimage signature not found - ih_magic = %x\n",
header->ih_magic);
spl_set_header_raw_uboot(spl_image);
#else
/* RAW image not supported, proceed to other boot methods. */
debug("Raw boot image support not enabled, proceeding to other boot methods");
return -EINVAL;
#endif
}
return 0;
}
__weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
{
typedef void __noreturn (*image_entry_noargs_t)(void);
image_entry_noargs_t image_entry =
(image_entry_noargs_t)spl_image->entry_point;
debug("image entry point: 0x%lX\n", spl_image->entry_point);
image_entry();
}
static int spl_common_init(bool setup_malloc)
{
int ret;
debug("spl_early_init()\n");
#if defined(CONFIG_SYS_MALLOC_F_LEN)
if (setup_malloc) {
#ifdef CONFIG_MALLOC_F_ADDR
gd->malloc_base = CONFIG_MALLOC_F_ADDR;
#endif
gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
gd->malloc_ptr = 0;
}
#endif
if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
ret = fdtdec_setup();
if (ret) {
debug("fdtdec_setup() returned error %d\n", ret);
return ret;
}
}
if (IS_ENABLED(CONFIG_SPL_DM)) {
/* With CONFIG_SPL_OF_PLATDATA, bring in all devices */
ret = dm_init_and_scan(!CONFIG_IS_ENABLED(OF_PLATDATA));
if (ret) {
debug("dm_init_and_scan() returned error %d\n", ret);
return ret;
}
}
return 0;
}
int spl_early_init(void)
{
int ret;
ret = spl_common_init(true);
if (ret)
return ret;
gd->flags |= GD_FLG_SPL_EARLY_INIT;
return 0;
}
int spl_init(void)
{
int ret;
bool setup_malloc = !(IS_ENABLED(CONFIG_SPL_STACK_R) &&
IS_ENABLED(CONFIG_SPL_SYS_MALLOC_SIMPLE));
if (!(gd->flags & GD_FLG_SPL_EARLY_INIT)) {
ret = spl_common_init(setup_malloc);
if (ret)
return ret;
}
gd->flags |= GD_FLG_SPL_INIT;
return 0;
}
#ifndef BOOT_DEVICE_NONE
#define BOOT_DEVICE_NONE 0xdeadbeef
#endif
__weak void board_boot_order(u32 *spl_boot_list)
{
spl_boot_list[0] = spl_boot_device();
}
static struct spl_image_loader *spl_ll_find_loader(uint boot_device)
{
struct spl_image_loader *drv =
ll_entry_start(struct spl_image_loader, spl_image_loader);
const int n_ents =
ll_entry_count(struct spl_image_loader, spl_image_loader);
struct spl_image_loader *entry;
for (entry = drv; entry != drv + n_ents; entry++) {
if (boot_device == entry->boot_device)
return entry;
}
/* Not found */
return NULL;
}
static int spl_load_image(struct spl_image_info *spl_image,
struct spl_image_loader *loader)
{
struct spl_boot_device bootdev;
bootdev.boot_device = loader->boot_device;
bootdev.boot_device_name = NULL;
return loader->load_image(spl_image, &bootdev);
}
/**
* boot_from_devices() - Try loading an booting U-Boot from a list of devices
*
* @spl_image: Place to put the image details if successful
* @spl_boot_list: List of boot devices to try
* @count: Number of elements in spl_boot_list
* @return 0 if OK, -ve on error
*/
static int boot_from_devices(struct spl_image_info *spl_image,
u32 spl_boot_list[], int count)
{
int i;
for (i = 0; i < count && spl_boot_list[i] != BOOT_DEVICE_NONE; i++) {
struct spl_image_loader *loader;
loader = spl_ll_find_loader(spl_boot_list[i]);
#if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
if (loader)
printf("Trying to boot from %s\n", loader->name);
else
puts("SPL: Unsupported Boot Device!\n");
#endif
if (loader && !spl_load_image(spl_image, loader))
return 0;
}
return -ENODEV;
}
void board_init_r(gd_t *dummy1, ulong dummy2)
{
u32 spl_boot_list[] = {
BOOT_DEVICE_NONE,
BOOT_DEVICE_NONE,
BOOT_DEVICE_NONE,
BOOT_DEVICE_NONE,
BOOT_DEVICE_NONE,
};
struct spl_image_info spl_image;
debug(">>spl:board_init_r()\n");
#if defined(CONFIG_SYS_SPL_MALLOC_START)
mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
CONFIG_SYS_SPL_MALLOC_SIZE);
gd->flags |= GD_FLG_FULL_MALLOC_INIT;
#endif
if (!(gd->flags & GD_FLG_SPL_INIT)) {
if (spl_init())
hang();
}
#ifndef CONFIG_PPC
/*
* timer_init() does not exist on PPC systems. The timer is initialized
* and enabled (decrementer) in interrupt_init() here.
*/
timer_init();
#endif
#ifdef CONFIG_SPL_BOARD_INIT
spl_board_init();
#endif
memset(&spl_image, '\0', sizeof(spl_image));
#ifdef CONFIG_SYS_SPL_ARGS_ADDR
spl_image.arg = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
#endif
board_boot_order(spl_boot_list);
if (boot_from_devices(&spl_image, spl_boot_list,
ARRAY_SIZE(spl_boot_list))) {
puts("SPL: failed to boot from all boot devices\n");
hang();
}
switch (spl_image.os) {
case IH_OS_U_BOOT:
debug("Jumping to U-Boot\n");
break;
#ifdef CONFIG_SPL_OS_BOOT
case IH_OS_LINUX:
debug("Jumping to Linux\n");
spl_board_prepare_for_linux();
jump_to_image_linux(&spl_image);
#endif
default:
debug("Unsupported OS image.. Jumping nevertheless..\n");
}
#if defined(CONFIG_SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
debug("SPL malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
gd->malloc_ptr / 1024);
#endif
debug("loaded - jumping to U-Boot...\n");
spl_board_prepare_for_boot();
jump_to_image_no_args(&spl_image);
}
/*
* This requires UART clocks to be enabled. In order for this to work the
* caller must ensure that the gd pointer is valid.
*/
void preloader_console_init(void)
{
gd->bd = &bdata;
gd->baudrate = CONFIG_BAUDRATE;
serial_init(); /* serial communications setup */
gd->have_console = 1;
puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
U_BOOT_TIME ")\n");
#ifdef CONFIG_SPL_DISPLAY_PRINT
spl_display_print();
#endif
}
/**
* spl_relocate_stack_gd() - Relocate stack ready for board_init_r() execution
*
* Sometimes board_init_f() runs with a stack in SRAM but we want to use SDRAM
* for the main board_init_r() execution. This is typically because we need
* more stack space for things like the MMC sub-system.
*
* This function calculates the stack position, copies the global_data into
* place, sets the new gd (except for ARM, for which setting GD within a C
* function may not always work) and returns the new stack position. The
* caller is responsible for setting up the sp register and, in the case
* of ARM, setting up gd.
*
* All of this is done using the same layout and alignments as done in
* board_init_f_init_reserve() / board_init_f_alloc_reserve().
*
* @return new stack location, or 0 to use the same stack
*/
ulong spl_relocate_stack_gd(void)
{
#ifdef CONFIG_SPL_STACK_R
gd_t *new_gd;
ulong ptr = CONFIG_SPL_STACK_R_ADDR;
#ifdef CONFIG_SPL_SYS_MALLOC_SIMPLE
if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
ptr -= CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
gd->malloc_base = ptr;
gd->malloc_limit = CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN;
gd->malloc_ptr = 0;
}
#endif
/* Get stack position: use 8-byte alignment for ABI compliance */
ptr = CONFIG_SPL_STACK_R_ADDR - roundup(sizeof(gd_t),16);
new_gd = (gd_t *)ptr;
memcpy(new_gd, (void *)gd, sizeof(gd_t));
#if CONFIG_IS_ENABLED(DM)
dm_fixup_for_gd_move(new_gd);
#endif
#if !defined(CONFIG_ARM)
gd = new_gd;
#endif
return ptr;
#else
return 0;
#endif
}