From: Wayne Lin <wlin@nvidia.com>
Date: Tue, 24 May 2016 22:28:42 +0000 (-0700)
Subject: spd: trusty: pass boot params to the Trusted OS
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=feb5aa24d28c4ec4051397cd025be29971a66175;p=project%2Fbcm63xx%2Fatf.git

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 cb28b2e5..750c3b0c 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 @@ static int32_t trusty_setup(void)
 					    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);