spd: trusty: pass boot params to the Trusted OS
This patch passes the boot parameters, provided by the previous
bootloader, to the Trusted OS via X0, X1 and X2.
Original change by: Wayne Lin <wlin@nvidia.com>
Change-Id: I2039612a8a8226158babfd505ce8c31c4212319c
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/services/spd/trusty/trusty.c b/services/spd/trusty/trusty.c
index cb28b2e..750c3b0 100644
--- a/services/spd/trusty/trusty.c
+++ b/services/spd/trusty/trusty.c
@@ -45,6 +45,9 @@
/* macro to check if Hypervisor is enabled in the HCR_EL2 register */
#define HYP_ENABLE_FLAG 0x286001
+/* length of Trusty's input parameters (in bytes) */
+#define TRUSTY_PARAMS_LEN_BYTES (4096*2)
+
struct trusty_stack {
uint8_t space[PLATFORM_STACK_SIZE] __aligned(16);
};
@@ -414,6 +417,14 @@
DAIF_IRQ_BIT |
DAIF_ABT_BIT);
+ /*
+ * arg0 = TZDRAM aperture available for BL32
+ * arg1 = BL32 boot params
+ * arg2 = BL32 boot params length
+ */
+ ep_info->args.arg1 = ep_info->args.arg2;
+ ep_info->args.arg2 = TRUSTY_PARAMS_LEN_BYTES;
+
bl31_register_bl32_init(trusty_init);
psci_register_spd_pm_hook(&trusty_pm);
