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spl: Drop bd_info in the data section 

This uses up space in the SPL binary but it always starts as zero. Also
some boards cannot support data in TPL (e.g. Intel Apollo Lake).

Use malloc() to allocate this structure instead, by moving the init a
little later, after malloc() is inited. Make this function optional since
it pulls in malloc().

This reduces the TPL binary size on coral by about 64 bytes

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-12-22 19:30:21 -07:00
parent acfb5308f5
commit 38d6b7ebda
4 changed files with 34 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/cpu/armv8/fsl-layerscape/spl.c
View File

@ -38,6 +38,9 @@ u32 spl_boot_device(void)
#ifdef CONFIG_SPL_BUILD
/* Define board data structure */
static struct bd_info bdata __attribute__ ((section(".data")));
void spl_board_init(void)
{
#if defined(CONFIG_NXP_ESBC) && defined(CONFIG_FSL_LSCH2)
@ -74,7 +77,7 @@ void board_init_f(ulong dummy)
get_clocks();
preloader_console_init();
spl_set_bd();
gd->bd = &bdata;
#ifdef CONFIG_SYS_I2C
#ifdef CONFIG_SPL_I2C_SUPPORT

9
common/spl/Kconfig
View File

@ -113,6 +113,15 @@ config SPL_FSL_PBL
Create boot binary having SPL binary in PBI format concatenated with
u-boot binary.
config SPL_ALLOC_BD
bool "Allocate memory for bd_info"
default y if X86 || SANDBOX
help
Some boards don't allocate space for this in their board_init_f()
code. In this case U-Boot can allocate space for gd->bd in the
standard SPL flow (board_init_r()). Enable this option to support
this feature.
endmenu
config HANDOFF

20
common/spl/spl.c
View File

@ -53,9 +53,6 @@ binman_sym_declare(ulong, spl, image_pos);
binman_sym_declare(ulong, spl, size);
#endif
/* Define board data structure */
static struct bd_info bdata __attribute__ ((section(".data")));
/*
* Board-specific Platform code can reimplement show_boot_progress () if needed
*/
@ -443,14 +440,19 @@ static int spl_common_init(bool setup_malloc)
return 0;
}
void spl_set_bd(void)
int spl_alloc_bd(void)
{
/*
* NOTE: On some platforms (e.g. x86) bdata may be in flash and not
* writeable.
*/
if (!gd->bd)
gd->bd = &bdata;
if (!gd->bd) {
gd->bd = malloc(sizeof(*gd->bd));
if (!gd->bd)
return -ENOMEM;
}
return 0;
}
int spl_early_init(void)
@ -600,8 +602,6 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
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);
@ -611,6 +611,10 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
if (spl_init())
hang();
}
if (IS_ENABLED(CONFIG_SPL_ALLOC_BD) && spl_alloc_bd()) {
puts("Cannot alloc bd\n");
hang();
}
#if !defined(CONFIG_PPC) && !defined(CONFIG_ARCH_MX6)
/*
* timer_init() does not exist on PPC systems. The timer is initialized

10
include/spl.h
View File

@ -285,7 +285,15 @@ u32 spl_mmc_boot_mode(const u32 boot_device);
* If not overridden, it is weakly defined in common/spl/spl_mmc.c.
*/
int spl_mmc_boot_partition(const u32 boot_device);
void spl_set_bd(void);
/**
* spl_alloc_bd() - Allocate space for bd_info
*
* This sets up the gd->bd pointer by allocating memory for it
*
* @return 0 if OK, -ENOMEM if out of memory
*/
int spl_alloc_bd(void);
/**
* spl_set_header_raw_uboot() - Set up a standard SPL image structure