1 files changed, 116 insertions, 0 deletions
diff --git a/services/spd/trusty/generic-arm64-smcall.c b/services/spd/trusty/generic-arm64-smcall.c
new file mode 100644
index 0000000..5c3a628
--- /dev/null
+++ b/services/spd/trusty/generic-arm64-smcall.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdio.h>
+
+#include <common/debug.h>
+#include <common/runtime_svc.h>
+#include <platform_def.h>
+
+#include "generic-arm64-smcall.h"
+
+#ifndef PLAT_ARM_GICD_BASE
+#ifdef GICD_BASE
+#define PLAT_ARM_GICD_BASE GICD_BASE
+#define PLAT_ARM_GICC_BASE GICC_BASE
+#ifdef GICR_BASE
+#define PLAT_ARM_GICR_BASE GICR_BASE
+#endif
+#else
+#error PLAT_ARM_GICD_BASE or GICD_BASE must be defined
+#endif
+#endif
+
+#ifndef PLAT_ARM_GICR_BASE
+#define PLAT_ARM_GICR_BASE SMC_UNK
+#endif
+
+int trusty_disable_serial_debug;
+
+struct dputc_state {
+	char linebuf[128];
+	unsigned l;
+};
+
+static struct dputc_state dputc_state[2];
+
+static void trusty_dputc(char ch, int secure)
+{
+	unsigned i;
+	struct dputc_state *s = &dputc_state[!secure];
+
+	if (trusty_disable_serial_debug)
+		return;
+
+	s->linebuf[s->l++] = ch;
+	if (s->l == sizeof(s->linebuf) || ch == '\n') {
+		if (secure)
+			printf("secure os: ");
+		else
+			printf("non-secure os: ");
+		for (i = 0; i < s->l; i++) {
+			putchar(s->linebuf[i]);
+		}
+		if (ch != '\n') {
+			printf(" <...>\n");
+		}
+		s->l = 0;
+	}
+}
+
+static uint64_t trusty_get_reg_base(uint32_t reg)
+{
+	switch (reg) {
+	case SMC_GET_GIC_BASE_GICD:
+		return PLAT_ARM_GICD_BASE;
+
+	case SMC_GET_GIC_BASE_GICC:
+		return PLAT_ARM_GICC_BASE;
+
+	case SMC_GET_GIC_BASE_GICR:
+		return PLAT_ARM_GICR_BASE;
+
+	default:
+		NOTICE("%s(0x%x) unknown reg\n", __func__, reg);
+		return SMC_UNK;
+	}
+}
+
+static uintptr_t trusty_generic_platform_smc(uint32_t smc_fid,
+			 u_register_t x1,
+			 u_register_t x2,
+			 u_register_t x3,
+			 u_register_t x4,
+			 void *cookie,
+			 void *handle,
+			 u_register_t flags)
+{
+	switch (smc_fid) {
+	case SMC_FC_DEBUG_PUTC:
+		trusty_dputc(x1, is_caller_secure(flags));
+		SMC_RET1(handle, 0);
+
+	case SMC_FC_GET_REG_BASE:
+	case SMC_FC64_GET_REG_BASE:
+		SMC_RET1(handle, trusty_get_reg_base(x1));
+
+	default:
+		NOTICE("%s(0x%x, 0x%lx) unknown smc\n", __func__, smc_fid, x1);
+		SMC_RET1(handle, SMC_UNK);
+	}
+}
+
+/* Define a SPD runtime service descriptor for fast SMC calls */
+DECLARE_RT_SVC(
+	trusty_fast,
+
+	SMC_ENTITY_PLATFORM_MONITOR,
+	SMC_ENTITY_PLATFORM_MONITOR,
+	SMC_TYPE_FAST,
+	NULL,
+	trusty_generic_platform_smc
+);
+