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| author | Alexandru Gagniuc <mr.nuke.me@gmail.com> | 2021-03-22 16:20:01 +0300 |
|---|---|---|
| committer | Patrice Chotard <patrice.chotard@foss.st.com> | 2021-04-09 12:59:13 +0300 |
| commit | a08d1a916b9b86889c8ff54d85bc3fb8989fd91c (patch) | |
| tree | c47bb3f338cae1cd2be24ade5cf475b6c0b96b0f /include | |
| parent | bbe10c70a2f4f055410c857c5a54625bf53ce70c (diff) | |
| download | u-boot-a08d1a916b9b86889c8ff54d85bc3fb8989fd91c.tar.xz | |
configs: stm32mp1: Fix misleading SPL size limitations
A now removed comment promises to "limit SYSRAM usage to first 128 KB".
This would imply that only SYSRAM from 0x2ffc0000 - 0x2ffe0000 would be
used. This is not what happens at all.
First, SPL_MAX_SIZE is referenced from SPL_TEXT_BASE, which on all
existing configs is set to 0x2ffc2500, not SYSRAM_BASE (0x2ffc0000).
Some of it is in the first 128 KiB and some of it is in the second
128 KiB chunk of SYSRAM.
Second, SPL_MAX_SIZE, does not restrict the BSS size. While a valiant
attempt is made via SPL_BSS_MAX_SIZE, the value of 0x00100000 is much
larger than SYSRAM, and doesn't account for the non-BSS sections.
Because we're putting the .text and .bss in the same boat, the correct
way to limit them together is via SPL_MAX_FOOTPRINT. With the current
SPL_TEXT_BASE, we couldn't limit even a very basic SPL to the first
128 KiB, and there is no technical reason to do so. Because of this,
simply allow the SPL to use all SYSRAM.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/configs/stm32mp1.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/configs/stm32mp1.h b/include/configs/stm32mp1.h index 56a70cb584..440efa1a55 100644 --- a/include/configs/stm32mp1.h +++ b/include/configs/stm32mp1.h @@ -50,12 +50,12 @@ /* SPL support */ #ifdef CONFIG_SPL /* SPL use DDR */ -#define CONFIG_SPL_BSS_MAX_SIZE 0x00100000 #define CONFIG_SYS_SPL_MALLOC_START 0xC0300000 #define CONFIG_SYS_SPL_MALLOC_SIZE 0x01D00000 -/* limit SYSRAM usage to first 128 KB */ -#define CONFIG_SPL_MAX_SIZE 0x00020000 +/* Restrict SPL to fit within SYSRAM */ +#define STM32_SYSRAM_END (STM32_SYSRAM_BASE + STM32_SYSRAM_SIZE) +#define CONFIG_SPL_MAX_FOOTPRINT (STM32_SYSRAM_END - CONFIG_SPL_TEXT_BASE) #define CONFIG_SPL_STACK (STM32_SYSRAM_BASE + \ STM32_SYSRAM_SIZE) #endif /* #ifdef CONFIG_SPL */ |