From: Andreas Dannenberg <dannenb...@ti.com>
Obtain the boot index as left behind by the device boot ROM and store
it in scratch pad SRAM for later use before it may get overwritten.
Signed-off-by: Andreas Dannenberg <dannenb...@ti.com>
---
arch/arm/mach-k3/j721e_init.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-k3/j721e_init.c b/arch/arm/mach-k3/j721e_init.c
index 7c288a1e6f..211ca448aa 100644
--- a/arch/arm/mach-k3/j721e_init.c
+++ b/arch/arm/mach-k3/j721e_init.c
@@ -53,12 +53,25 @@ static void ctrl_mmr_unlock(void)
mmr_unlock(CTRL_MMR0_BASE, 7);
}
+/*
+ * This uninitialized global variable would normal end up in the .bss section,
+ * but the .bss is cleared between writing and reading this variable, so move
+ * it to the .data section.
+ */
+u32 bootindex __attribute__((section(".data")));
+
+static void store_boot_index_from_rom(void)
+{
+ bootindex = *(u32 *)(CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX);
+}
+
void board_init_f(ulong dummy)
{
/*
- * ToDo:
- * - Store boot rom index.
+ * Cannot delay this further as there is a chance that
+ * K3_BOOT_PARAM_TABLE_INDEX can be over written by SPL MALLOC section.
*/
+ store_boot_index_from_rom();
/* Make all control module registers accessible */
ctrl_mmr_unlock();
--
2.17.1
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