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u-boot-brain/common/spl/spl.c
Hans de Goede dcfcb8d49a malloc_simple: Add support for switching to DRAM heap 
malloc_simple uses a part of the stack as heap, initially it uses
SYS_MALLOC_F_LEN bytes which typically is quite small as the initial
stacks sits in SRAM and we do not have that much SRAM to work with.

When DRAM becomes available we may switch the stack from SRAM to DRAM
to give use more room. This commit adds support for also switching to
a new bigger malloc_simple heap located in the new stack.

Note that this requires spl_init to be called before spl_relocate_stack_gd
which in practice means that spl_init must be called from board_init_f.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-10-20 18:40:27 +02:00

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/*
* (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 <i2c.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;
struct spl_image_info spl_image;
/* Define board data structure */
static bd_t bdata __attribute__ ((section(".data")));
/*
* 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;
}
#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! */
}
void spl_set_header_raw_uboot(void)
{
spl_image.size = CONFIG_SYS_MONITOR_LEN;
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";
}
void spl_parse_image_header(const struct image_header *header)
{
u32 header_size = sizeof(struct image_header);
if (image_get_magic(header) == IH_MAGIC) {
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%x size: %d\n",
(int)sizeof(spl_image.name), spl_image.name,
spl_image.load_addr, spl_image.size);
} 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");
#else
/* Signature not found - assume u-boot.bin */
debug("mkimage signature not found - ih_magic = %x\n",
header->ih_magic);
spl_set_header_raw_uboot();
#endif
}
}
__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)(unsigned long)spl_image->entry_point;
debug("image entry point: 0x%X\n", spl_image->entry_point);
image_entry();
}
#ifdef CONFIG_SPL_RAM_DEVICE
static void spl_ram_load_image(void)
{
const struct image_header *header;
/*
* Get the header. It will point to an address defined by handoff
* which will tell where the image located inside the flash. For
* now, it will temporary fixed to address pointed by U-Boot.
*/
header = (struct image_header *)
(CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
spl_parse_image_header(header);
}
#endif
int spl_init(void)
{
int ret;
debug("spl_init()\n");
#if defined(CONFIG_SYS_MALLOC_F_LEN)
gd->malloc_limit = CONFIG_SYS_MALLOC_F_LEN;
gd->malloc_ptr = 0;
#endif
if (CONFIG_IS_ENABLED(OF_CONTROL)) {
ret = fdtdec_setup();
if (ret) {
debug("fdtdec_setup() returned error %d\n", ret);
return ret;
}
}
if (IS_ENABLED(CONFIG_SPL_DM)) {
ret = dm_init_and_scan(true);
if (ret) {
debug("dm_init_and_scan() returned error %d\n", ret);
return ret;
}
}
gd->flags |= GD_FLG_SPL_INIT;
return 0;
}
void board_init_r(gd_t *dummy1, ulong dummy2)
{
u32 boot_device;
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
boot_device = spl_boot_device();
debug("boot device - %d\n", boot_device);
switch (boot_device) {
#ifdef CONFIG_SPL_RAM_DEVICE
case BOOT_DEVICE_RAM:
spl_ram_load_image();
break;
#endif
#ifdef CONFIG_SPL_MMC_SUPPORT
case BOOT_DEVICE_MMC1:
case BOOT_DEVICE_MMC2:
case BOOT_DEVICE_MMC2_2:
spl_mmc_load_image();
break;
#endif
#ifdef CONFIG_SPL_NAND_SUPPORT
case BOOT_DEVICE_NAND:
spl_nand_load_image();
break;
#endif
#ifdef CONFIG_SPL_ONENAND_SUPPORT
case BOOT_DEVICE_ONENAND:
spl_onenand_load_image();
break;
#endif
#ifdef CONFIG_SPL_NOR_SUPPORT
case BOOT_DEVICE_NOR:
spl_nor_load_image();
break;
#endif
#ifdef CONFIG_SPL_YMODEM_SUPPORT
case BOOT_DEVICE_UART:
spl_ymodem_load_image();
break;
#endif
#ifdef CONFIG_SPL_SPI_SUPPORT
case BOOT_DEVICE_SPI:
spl_spi_load_image();
break;
#endif
#ifdef CONFIG_SPL_ETH_SUPPORT
case BOOT_DEVICE_CPGMAC:
#ifdef CONFIG_SPL_ETH_DEVICE
spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
#else
spl_net_load_image(NULL);
#endif
break;
#endif
#ifdef CONFIG_SPL_USBETH_SUPPORT
case BOOT_DEVICE_USBETH:
spl_net_load_image("usb_ether");
break;
#endif
#ifdef CONFIG_SPL_USB_SUPPORT
case BOOT_DEVICE_USB:
spl_usb_load_image();
break;
#endif
#ifdef CONFIG_SPL_SATA_SUPPORT
case BOOT_DEVICE_SATA:
spl_sata_load_image();
break;
#endif
#ifdef CONFIG_SPL_BOARD_LOAD_IMAGE
case BOOT_DEVICE_BOARD:
spl_board_load_image();
break;
#endif
default:
#if defined(CONFIG_SPL_SERIAL_SUPPORT) && defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
puts("SPL: Unsupported Boot Device!\n");
#endif
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((void *)CONFIG_SYS_SPL_ARGS_ADDR);
#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...");
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 and returns the new stack position. The caller is responsible for
* setting up the sp register.
*
* @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;
/* Get stack position: use 8-byte alignment for ABI compliance */
ptr = CONFIG_SPL_STACK_R_ADDR - sizeof(gd_t);
ptr &= ~7;
new_gd = (gd_t *)ptr;
memcpy(new_gd, (void *)gd, sizeof(gd_t));
gd = new_gd;
#ifdef CONFIG_SPL_SYS_MALLOC_SIMPLE
if (CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN) {
if (!(gd->flags & GD_FLG_SPL_INIT))
panic("spl_init must be called before heap reloc");
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
return ptr;
#else
return 0;
#endif
}
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