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spl: Add methods to find the position/size of next phase

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Binman supports writing the position and size of U-Boot proper and SPL
into the previous phase of U-Boot. This allows the next phase to be easily
located and loaded.

Add functions to return these useful values, along with symbols to allow
TPL to load SPL.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2019-12-08 17:40:12 -07:00 committed by Bin Meng
parent f5b18ae309
commit e82c624d7c
2 changed files with 40 additions and 1 deletions
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20
common/spl/spl.c
View File

@ -42,6 +42,12 @@ u32 *boot_params_ptr = NULL;
/* See spl.h for information about this */
binman_sym_declare(ulong, u_boot_any, image_pos);
binman_sym_declare(ulong, u_boot_any, size);
#ifdef CONFIG_TPL
binman_sym_declare(ulong, spl, image_pos);
binman_sym_declare(ulong, spl, size);
#endif
/* Define board data structure */
static bd_t bdata __attribute__ ((section(".data")));
@ -120,6 +126,20 @@ void spl_fixup_fdt(void)
#endif
}
ulong spl_get_image_pos(void)
{
return spl_phase() == PHASE_TPL ?
binman_sym(ulong, spl, image_pos) :
binman_sym(ulong, u_boot_any, image_pos);
}
ulong spl_get_image_size(void)
{
return spl_phase() == PHASE_TPL ?
binman_sym(ulong, spl, size) :
binman_sym(ulong, u_boot_any, size);
}
/*
* Weak default function for board specific cleanup/preparation before
* Linux boot. Some boards/platforms might not need it, so just provide

21
include/spl.h
View File

@ -169,10 +169,29 @@ struct spl_load_info {
* We need to know the position of U-Boot in memory so we can jump to it. We
* allow any U-Boot binary to be used (u-boot.bin, u-boot-nodtb.bin,
* u-boot.img), hence the '_any'. These is no checking here that the correct
* image is found. For * example if u-boot.img is used we don't check that
* image is found. For example if u-boot.img is used we don't check that
* spl_parse_image_header() can parse a valid header.
*
* Similarly for SPL, so that TPL can jump to SPL.
*/
binman_sym_extern(ulong, u_boot_any, image_pos);
binman_sym_extern(ulong, u_boot_any, size);
binman_sym_extern(ulong, spl, image_pos);
binman_sym_extern(ulong, spl, size);
/**
* spl_get_image_pos() - get the image position of the next phase
*
* This returns the image position to use to load the next phase of U-Boot
*/
ulong spl_get_image_pos(void);
/**
* spl_get_image_size() - get the size of the next phase
*
* This returns the size to use to load the next phase of U-Boot
*/
ulong spl_get_image_size(void);
/**
* spl_load_simple_fit_skip_processing() - Hook to allow skipping the FIT