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 --- board/CZ.NIC/turris_omnia/turris_omnia.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/board/CZ.NIC/turris_omnia/turris_omnia.c b/board/CZ.NIC/turris_omnia/turris_omnia.c index 33cec6587e19..a93af6c5b877 100644 --- a/board/CZ.NIC/turris_omnia/turris_omnia.c +++ b/board/CZ.NIC/turris_omnia/turris_omnia.c @@ -243,6 +243,16 @@ 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()) {