u-boot/common/spl/spl.c
Lukas Auer c7e1effb96 riscv: support SPL stack and global data relocation
To support relocation of the stack and global data on RISC-V, the
secondary harts must be notified of the change using IPIs. We can reuse
the hart relocation code for this purpose. It uses global data to store
the new stack pointer and global data pointer for the secondary harts.
This means that we cannot update the global data pointer of the main
hart in spl_relocate_stack_gd(), because the secondary harts have not
yet been relocated at this point. It is updated after the secondary
harts have been notified.

Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
2019-08-26 16:07:42 +08:00

791 lines
20 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.com>
*/
#include <common.h>
#include <bloblist.h>
#include <binman_sym.h>
#include <dm.h>
#include <handoff.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>
#include <fdt_support.h>
#include <bootcount.h>
#include <wdt.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;
/* See spl.h for information about this */
binman_sym_declare(ulong, u_boot_any, image_pos);
/* 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) {}
#if defined(CONFIG_SPL_OS_BOOT) || CONFIG_IS_ENABLED(HANDOFF)
/* weak, default platform-specific function to initialize dram banks */
__weak int dram_init_banksize(void)
{
return 0;
}
#endif
/*
* 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_TPL_PROMPT
"Please implement spl_start_uboot() for your board\n");
puts(SPL_TPL_PROMPT "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 arch/board-specific fixups to the spl_image_info */
void __weak spl_perform_fixups(struct spl_image_info *spl_image)
{
}
void spl_fixup_fdt(void)
{
#if defined(CONFIG_SPL_OF_LIBFDT) && defined(CONFIG_SYS_SPL_ARGS_ADDR)
void *fdt_blob = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
int err;
err = fdt_check_header(fdt_blob);
if (err < 0) {
printf("fdt_root: %s\n", fdt_strerror(err));
return;
}
/* fixup the memory dt node */
err = fdt_shrink_to_minimum(fdt_blob, 0);
if (err == 0) {
printf(SPL_TPL_PROMPT "fdt_shrink_to_minimum err - %d\n", err);
return;
}
err = arch_fixup_fdt(fdt_blob);
if (err) {
printf(SPL_TPL_PROMPT "arch_fixup_fdt err - %d\n", err);
return;
}
#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! */
}
__weak struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
{
return (struct image_header *)(CONFIG_SYS_TEXT_BASE + offset);
}
void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
{
ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
spl_image->size = CONFIG_SYS_MONITOR_LEN;
/*
* Binman error cases: address of the end of the previous region or the
* start of the image's entry area (usually 0) if there is no previous
* region.
*/
if (u_boot_pos && u_boot_pos != BINMAN_SYM_MISSING) {
/* Binman does not support separated entry addresses */
spl_image->entry_point = u_boot_pos;
spl_image->load_addr = u_boot_pos;
} else {
spl_image->entry_point = CONFIG_SYS_UBOOT_START;
spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
}
spl_image->os = IH_OS_U_BOOT;
spl_image->name = "U-Boot";
}
#ifdef CONFIG_SPL_LOAD_FIT_FULL
/* Parse and load full fitImage in SPL */
static int spl_load_fit_image(struct spl_image_info *spl_image,
const struct image_header *header)
{
bootm_headers_t images;
const char *fit_uname_config = NULL;
const char *fit_uname_fdt = FIT_FDT_PROP;
const char *uname;
ulong fw_data = 0, dt_data = 0, img_data = 0;
ulong fw_len = 0, dt_len = 0, img_len = 0;
int idx, conf_noffset;
int ret;
#ifdef CONFIG_SPL_FIT_SIGNATURE
images.verify = 1;
#endif
ret = fit_image_load(&images, (ulong)header,
NULL, &fit_uname_config,
IH_ARCH_DEFAULT, IH_TYPE_STANDALONE, -1,
FIT_LOAD_REQUIRED, &fw_data, &fw_len);
if (ret < 0)
return ret;
spl_image->size = fw_len;
spl_image->entry_point = fw_data;
spl_image->load_addr = fw_data;
spl_image->os = IH_OS_U_BOOT;
spl_image->name = "U-Boot";
debug(SPL_TPL_PROMPT "payload image: %32s load addr: 0x%lx size: %d\n",
spl_image->name, spl_image->load_addr, spl_image->size);
#ifdef CONFIG_SPL_FIT_SIGNATURE
images.verify = 1;
#endif
ret = fit_image_load(&images, (ulong)header,
&fit_uname_fdt, &fit_uname_config,
IH_ARCH_DEFAULT, IH_TYPE_FLATDT, -1,
FIT_LOAD_OPTIONAL, &dt_data, &dt_len);
if (ret >= 0)
spl_image->fdt_addr = (void *)dt_data;
conf_noffset = fit_conf_get_node((const void *)header,
fit_uname_config);
if (conf_noffset <= 0)
return 0;
for (idx = 0;
uname = fdt_stringlist_get((const void *)header, conf_noffset,
FIT_LOADABLE_PROP, idx,
NULL), uname;
idx++)
{
#ifdef CONFIG_SPL_FIT_SIGNATURE
images.verify = 1;
#endif
ret = fit_image_load(&images, (ulong)header,
&uname, &fit_uname_config,
IH_ARCH_DEFAULT, IH_TYPE_LOADABLE, -1,
FIT_LOAD_OPTIONAL_NON_ZERO,
&img_data, &img_len);
if (ret < 0)
return ret;
}
return 0;
}
#endif
int spl_parse_image_header(struct spl_image_info *spl_image,
const struct image_header *header)
{
#ifdef CONFIG_SPL_LOAD_FIT_FULL
int ret = spl_load_fit_image(spl_image, header);
if (!ret)
return ret;
#endif
if (image_get_magic(header) == IH_MAGIC) {
#ifdef CONFIG_SPL_LEGACY_IMAGE_SUPPORT
u32 header_size = sizeof(struct image_header);
#ifdef CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK
/* check uImage header CRC */
if (!image_check_hcrc(header)) {
puts("SPL: Image header CRC check failed!\n");
return -EINVAL;
}
#endif
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;
}
#ifdef CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK
/* store uImage data length and CRC to check later */
spl_image->dcrc_data = image_get_load(header);
spl_image->dcrc_length = image_get_data_size(header);
spl_image->dcrc = image_get_dcrc(header);
#endif
spl_image->os = image_get_os(header);
spl_image->name = image_get_name(header);
debug(SPL_TPL_PROMPT
"payload image: %32s load addr: 0x%lx size: %d\n",
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\n");
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_TPL_PROMPT
"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\n");
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();
}
#if CONFIG_IS_ENABLED(HANDOFF)
/**
* Set up the SPL hand-off information
*
* This is initially empty (zero) but can be written by
*/
static int setup_spl_handoff(void)
{
struct spl_handoff *ho;
ho = bloblist_ensure(BLOBLISTT_SPL_HANDOFF, sizeof(struct spl_handoff));
if (!ho)
return -ENOENT;
return 0;
}
static int write_spl_handoff(void)
{
struct spl_handoff *ho;
ho = bloblist_find(BLOBLISTT_SPL_HANDOFF, sizeof(struct spl_handoff));
if (!ho)
return -ENOENT;
handoff_save_dram(ho);
#ifdef CONFIG_SANDBOX
ho->arch.magic = TEST_HANDOFF_MAGIC;
#endif
debug(SPL_TPL_PROMPT "Wrote SPL handoff\n");
return 0;
}
#else
static inline int setup_spl_handoff(void) { return 0; }
static inline int write_spl_handoff(void) { return 0; }
#endif /* HANDOFF */
static int spl_common_init(bool setup_malloc)
{
int ret;
#if CONFIG_VAL(SYS_MALLOC_F_LEN)
if (setup_malloc) {
#ifdef CONFIG_MALLOC_F_ADDR
gd->malloc_base = CONFIG_MALLOC_F_ADDR;
#endif
gd->malloc_limit = CONFIG_VAL(SYS_MALLOC_F_LEN);
gd->malloc_ptr = 0;
}
#endif
ret = bootstage_init(true);
if (ret) {
debug("%s: Failed to set up bootstage: ret=%d\n", __func__,
ret);
return ret;
}
bootstage_mark_name(BOOTSTAGE_ID_START_SPL, "spl");
#if CONFIG_IS_ENABLED(LOG)
ret = log_init();
if (ret) {
debug("%s: Failed to set up logging\n", __func__);
return ret;
}
#endif
if (CONFIG_IS_ENABLED(BLOBLIST)) {
ret = bloblist_init();
if (ret) {
debug("%s: Failed to set up bloblist: ret=%d\n",
__func__, ret);
return ret;
}
}
if (CONFIG_IS_ENABLED(HANDOFF)) {
int ret;
ret = setup_spl_handoff();
if (ret) {
puts(SPL_TPL_PROMPT "Cannot set up SPL handoff\n");
hang();
}
}
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 (CONFIG_IS_ENABLED(DM)) {
bootstage_start(BOOTSTATE_ID_ACCUM_DM_SPL, "dm_spl");
/* With CONFIG_SPL_OF_PLATDATA, bring in all devices */
ret = dm_init_and_scan(!CONFIG_IS_ENABLED(OF_PLATDATA));
bootstage_accum(BOOTSTATE_ID_ACCUM_DM_SPL);
if (ret) {
debug("dm_init_and_scan() returned error %d\n", ret);
return ret;
}
}
return 0;
}
void spl_set_bd(void)
{
/*
* NOTE: On some platforms (e.g. x86) bdata may be in flash and not
* writeable.
*/
if (!gd->bd)
gd->bd = &bdata;
}
int spl_early_init(void)
{
int ret;
debug("%s\n", __func__);
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));
debug("%s\n", __func__);
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)
{
int ret;
struct spl_boot_device bootdev;
bootdev.boot_device = loader->boot_device;
bootdev.boot_device_name = NULL;
ret = loader->load_image(spl_image, &bootdev);
#ifdef CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK
if (!ret && spl_image->dcrc_length) {
/* check data crc */
ulong dcrc = crc32_wd(0, (unsigned char *)spl_image->dcrc_data,
spl_image->dcrc_length, CHUNKSZ_CRC32);
if (dcrc != spl_image->dcrc) {
puts("SPL: Image data CRC check failed!\n");
ret = -EINVAL;
}
}
#endif
return ret;
}
/**
* boot_from_devices() - Try loading a 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_TPL_PROMPT "Unsupported Boot Device!\n");
#endif
if (loader && !spl_load_image(spl_image, loader)) {
spl_image->boot_device = spl_boot_list[i];
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;
int ret;
debug(">>" SPL_TPL_PROMPT "board_init_r()\n");
spl_set_bd();
#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();
}
#if !defined(CONFIG_PPC) && !defined(CONFIG_ARCH_MX6)
/*
* timer_init() does not exist on PPC systems. The timer is initialized
* and enabled (decrementer) in interrupt_init() here.
*/
timer_init();
#endif
#if CONFIG_IS_ENABLED(BOARD_INIT)
spl_board_init();
#endif
#if defined(CONFIG_SPL_WATCHDOG_SUPPORT) && CONFIG_IS_ENABLED(WDT)
initr_watchdog();
#endif
if (IS_ENABLED(CONFIG_SPL_OS_BOOT) || CONFIG_IS_ENABLED(HANDOFF))
dram_init_banksize();
bootcount_inc();
memset(&spl_image, '\0', sizeof(spl_image));
#ifdef CONFIG_SYS_SPL_ARGS_ADDR
spl_image.arg = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
#endif
spl_image.boot_device = BOOT_DEVICE_NONE;
board_boot_order(spl_boot_list);
if (boot_from_devices(&spl_image, spl_boot_list,
ARRAY_SIZE(spl_boot_list))) {
puts(SPL_TPL_PROMPT "failed to boot from all boot devices\n");
hang();
}
spl_perform_fixups(&spl_image);
if (CONFIG_IS_ENABLED(HANDOFF)) {
ret = write_spl_handoff();
if (ret)
printf(SPL_TPL_PROMPT
"SPL hand-off write failed (err=%d)\n", ret);
}
if (CONFIG_IS_ENABLED(BLOBLIST)) {
ret = bloblist_finish();
if (ret)
printf("Warning: Failed to finish bloblist (ret=%d)\n",
ret);
}
#ifdef CONFIG_CPU_V7M
spl_image.entry_point |= 0x1;
#endif
switch (spl_image.os) {
case IH_OS_U_BOOT:
debug("Jumping to U-Boot\n");
break;
#if CONFIG_IS_ENABLED(ATF)
case IH_OS_ARM_TRUSTED_FIRMWARE:
debug("Jumping to U-Boot via ARM Trusted Firmware\n");
spl_invoke_atf(&spl_image);
break;
#endif
#if CONFIG_IS_ENABLED(OPTEE)
case IH_OS_TEE:
debug("Jumping to U-Boot via OP-TEE\n");
spl_optee_entry(NULL, NULL, spl_image.fdt_addr,
(void *)spl_image.entry_point);
break;
#endif
#if CONFIG_IS_ENABLED(OPENSBI)
case IH_OS_OPENSBI:
debug("Jumping to U-Boot via RISC-V OpenSBI\n");
spl_invoke_opensbi(&spl_image);
break;
#endif
#ifdef CONFIG_SPL_OS_BOOT
case IH_OS_LINUX:
debug("Jumping to Linux\n");
spl_fixup_fdt();
spl_board_prepare_for_linux();
jump_to_image_linux(&spl_image);
#endif
default:
debug("Unsupported OS image.. Jumping nevertheless..\n");
}
#if CONFIG_VAL(SYS_MALLOC_F_LEN) && !defined(CONFIG_SYS_SPL_MALLOC_SIZE)
debug("SPL malloc() used 0x%lx bytes (%ld KB)\n", gd->malloc_ptr,
gd->malloc_ptr / 1024);
#endif
#ifdef CONFIG_BOOTSTAGE_STASH
bootstage_mark_name(BOOTSTAGE_ID_END_SPL, "end_spl");
ret = bootstage_stash((void *)CONFIG_BOOTSTAGE_STASH_ADDR,
CONFIG_BOOTSTAGE_STASH_SIZE);
if (ret)
debug("Failed to stash bootstage: err=%d\n", ret);
#endif
debug("loaded - jumping to U-Boot...\n");
spl_board_prepare_for_boot();
jump_to_image_no_args(&spl_image);
}
#ifdef CONFIG_SPL_SERIAL_SUPPORT
/*
* 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->baudrate = CONFIG_BAUDRATE;
serial_init(); /* serial communications setup */
gd->have_console = 1;
#if CONFIG_IS_ENABLED(BANNER_PRINT)
puts("\nU-Boot " SPL_TPL_NAME " " PLAIN_VERSION " (" U_BOOT_DATE " - "
U_BOOT_TIME " " U_BOOT_TZ ")\n");
#endif
#ifdef CONFIG_SPL_DISPLAY_PRINT
spl_display_print();
#endif
}
#endif
/**
* This function is called before the stack is changed from initial stack to
* relocated stack. It tries to dump the stack size used
*/
__weak void spl_relocate_stack_check(void)
{
#if CONFIG_IS_ENABLED(SYS_REPORT_STACK_F_USAGE)
ulong init_sp = gd->start_addr_sp;
ulong stack_bottom = init_sp - CONFIG_VAL(SIZE_LIMIT_PROVIDE_STACK);
u8 *ptr = (u8 *)stack_bottom;
ulong i;
for (i = 0; i < CONFIG_VAL(SIZE_LIMIT_PROVIDE_STACK); i++) {
if (*ptr != CONFIG_VAL(SYS_STACK_F_CHECK_BYTE))
break;
ptr++;
}
printf("SPL initial stack usage: %lu bytes\n",
CONFIG_VAL(SIZE_LIMIT_PROVIDE_STACK) - i);
#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;
if (CONFIG_IS_ENABLED(SYS_REPORT_STACK_F_USAGE))
spl_relocate_stack_check();
#if defined(CONFIG_SPL_SYS_MALLOC_SIMPLE) && CONFIG_VAL(SYS_MALLOC_F_LEN)
if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
debug("SPL malloc() before relocation used 0x%lx bytes (%ld KB)\n",
gd->malloc_ptr, gd->malloc_ptr / 1024);
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) && !defined(CONFIG_RISCV)
gd = new_gd;
#endif
return ptr;
#else
return 0;
#endif
}