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arm: mvebu: turris_omnia: Provide env_sf_get_env_addr() function

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BootROM maps SPI Flash to fixed address 0xD4000000 and this mapping is
active also when BootROM is executing binary kwbimage headers, which
includes also U-Boot SPL.

Therefore no initialization code is required to access SPI Flags from
U-Boot SPL. In proper U-Boot it is remapped to other location.

So in mvebu implementation of env_sf_get_env_addr() function returns
0xD4000000 when running in SPL and NULL when in proper U-Boot.

This change would allow to use U-Boot ENV in U-Boot SPL. Normally it is not
possible to read ENV because it is too big and U-Boot SPL does not have
such big malloc() pool to real all ENV variables.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
This commit is contained in:
Pali Rohár 2022-03-02 12:47:52 +01:00 committed by Stefan Roese
parent f4bf81b013
commit d6ba5c4f92
1 changed files with 10 additions and 0 deletions
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10
board/CZ.NIC/turris_omnia/turris_omnia.c
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@ -236,6 +236,16 @@ static bool omnia_detect_sata(void)
return stsword & MSATA_IND_STSBIT ? true : false;
}
void *env_sf_get_env_addr(void)
{
/* SPI Flash is mapped to address 0xD4000000 only in SPL */
#ifdef CONFIG_SPL_BUILD
return (void *)0xD4000000 + CONFIG_ENV_OFFSET;
#else
return NULL;
#endif
}
int hws_board_topology_load(struct serdes_map **serdes_map_array, u8 *count)
{
if (omnia_detect_sata()) {