Tegra210: SiP handlers to allow PMC access
This patch adds SiP handler for Tegra210 platforms to service
read/write requests for PMC block. None of the secure registers
are accessible to the NS world though.
Change-Id: I7dc1f10c6a6ee6efc642ddcfb1170fb36d3accff
Signed-off-by: kalyani chidambaram <kalyanic@nvidia.com>
diff --git a/plat/nvidia/tegra/soc/t210/plat_sip_calls.c b/plat/nvidia/tegra/soc/t210/plat_sip_calls.c
new file mode 100644
index 0000000..0e8900e
--- /dev/null
+++ b/plat/nvidia/tegra/soc/t210/plat_sip_calls.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <assert.h>
+#include <common/bl_common.h>
+#include <common/debug.h>
+#include <common/runtime_svc.h>
+#include <errno.h>
+#include <mmio.h>
+#include <utils_def.h>
+
+#include <memctrl.h>
+#include <pmc.h>
+#include <tegra_private.h>
+#include <tegra_platform.h>
+#include <tegra_def.h>
+
+/*******************************************************************************
+ * PMC parameters
+ ******************************************************************************/
+#define PMC_READ U(0xaa)
+#define PMC_WRITE U(0xbb)
+
+/*******************************************************************************
+ * Tegra210 SiP SMCs
+ ******************************************************************************/
+#define TEGRA_SIP_PMC_COMMANDS U(0xC2FFFE00)
+
+/*******************************************************************************
+ * This function is responsible for handling all T210 SiP calls
+ ******************************************************************************/
+int plat_sip_handler(uint32_t smc_fid,
+ uint64_t x1,
+ uint64_t x2,
+ uint64_t x3,
+ uint64_t x4,
+ const void *cookie,
+ void *handle,
+ uint64_t flags)
+{
+ uint32_t val, ns;
+
+ /* Determine which security state this SMC originated from */
+ ns = is_caller_non_secure(flags);
+ if (!ns)
+ SMC_RET1(handle, SMC_UNK);
+
+ switch (smc_fid) {
+ case TEGRA_SIP_PMC_COMMANDS:
+
+ /* check the address is within PMC range and is 4byte aligned */
+ if ((x2 >= TEGRA_PMC_SIZE) || (x2 & 0x3))
+ return -EINVAL;
+
+ /* pmc_secure_scratch registers are not accessible */
+ if (((x2 >= PMC_SECURE_SCRATCH0) && (x2 <= PMC_SECURE_SCRATCH5)) ||
+ ((x2 >= PMC_SECURE_SCRATCH6) && (x2 <= PMC_SECURE_SCRATCH7)) ||
+ ((x2 >= PMC_SECURE_SCRATCH8) && (x2 <= PMC_SECURE_SCRATCH79)) ||
+ ((x2 >= PMC_SECURE_SCRATCH80) && (x2 <= PMC_SECURE_SCRATCH119)))
+ return -EFAULT;
+
+ /* PMC secure-only registers are not accessible */
+ if ((x2 == PMC_DPD_ENABLE_0) || (x2 == PMC_FUSE_CONTROL_0) ||
+ (x2 == PMC_CRYPTO_OP_0))
+ return -EFAULT;
+
+ /* Perform PMC read/write */
+ if (x1 == PMC_READ) {
+ val = mmio_read_32((uint32_t)(TEGRA_PMC_BASE + x2));
+ write_ctx_reg(get_gpregs_ctx(handle), CTX_GPREG_X1, val);
+ } else if (x1 == PMC_WRITE) {
+ mmio_write_32((uint32_t)(TEGRA_PMC_BASE + x2), (uint32_t)x3);
+ } else {
+ return -EINVAL;
+ }
+
+ break;
+
+ default:
+ ERROR("%s: unsupported function ID\n", __func__);
+ return -ENOTSUP;
+ }
+
+ return 0;
+}
diff --git a/plat/nvidia/tegra/soc/t210/platform_t210.mk b/plat/nvidia/tegra/soc/t210/platform_t210.mk
index 723534a..d9371ed 100644
--- a/plat/nvidia/tegra/soc/t210/platform_t210.mk
+++ b/plat/nvidia/tegra/soc/t210/platform_t210.mk
@@ -36,7 +36,8 @@
${SOC_DIR}/plat_psci_handlers.c \
${SOC_DIR}/plat_setup.c \
${SOC_DIR}/drivers/se/security_engine.c \
- ${SOC_DIR}/plat_secondary.c
+ ${SOC_DIR}/plat_secondary.c \
+ ${SOC_DIR}/plat_sip_calls.c
# Enable workarounds for selected Cortex-A57 erratas.
A57_DISABLE_NON_TEMPORAL_HINT := 1