Tegra: get BL31 arguments from previous bootloader
This patch implements handlers which platforms can override to
get the BL31 arguments passed by the previous bootloader.
Change-Id: I6b9628a984644ce1b5de5aa6d7cd890e57241d89
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/common/tegra_bl31_setup.c b/plat/nvidia/tegra/common/tegra_bl31_setup.c
index 6237c80..5ad3e79 100644
--- a/plat/nvidia/tegra/common/tegra_bl31_setup.c
+++ b/plat/nvidia/tegra/common/tegra_bl31_setup.c
@@ -84,12 +84,24 @@
* provide typical implementations that will be overridden by a SoC.
******************************************************************************/
#pragma weak plat_early_platform_setup
+#pragma weak plat_get_bl31_params
+#pragma weak plat_get_bl31_plat_params
void plat_early_platform_setup(void)
{
; /* do nothing */
}
+bl31_params_t *plat_get_bl31_params(void)
+{
+ return NULL;
+}
+
+plat_params_from_bl2_t *plat_get_bl31_plat_params(void)
+{
+ return NULL;
+}
+
/*******************************************************************************
* Return a pointer to the 'entry_point_info' structure of the next image for
* security state specified. BL33 corresponds to the non-secure image type
@@ -130,9 +142,21 @@
#endif
/*
+ * For RESET_TO_BL31 systems, BL31 is the first bootloader to run so
+ * there's no argument to relay from a previous bootloader. Platforms
+ * might use custom ways to get arguments, so provide handlers which
+ * they can override.
+ */
+ if (from_bl2 == NULL)
+ from_bl2 = plat_get_bl31_params();
+ if (plat_params == NULL)
+ plat_params = plat_get_bl31_plat_params();
+
+ /*
* Copy BL3-3, BL3-2 entry point information.
* They are stored in Secure RAM, in BL2's address space.
*/
+ assert(from_bl2);
assert(from_bl2->bl33_ep_info);
bl33_image_ep_info = *from_bl2->bl33_ep_info;
diff --git a/plat/nvidia/tegra/include/tegra_private.h b/plat/nvidia/tegra/include/tegra_private.h
index c09a153..012bfd7 100644
--- a/plat/nvidia/tegra/include/tegra_private.h
+++ b/plat/nvidia/tegra/include/tegra_private.h
@@ -82,6 +82,8 @@
const mmap_region_t *plat_get_mmio_map(void);
uint32_t plat_get_console_from_id(int id);
void plat_gic_setup(void);
+bl31_params_t *plat_get_bl31_params(void);
+plat_params_from_bl2_t *plat_get_bl31_plat_params(void);
/* Declarations for plat_secondary.c */
void plat_secondary_setup(void);
