trusty: Add generic-arm64 support

Add smc calls to return gic base address and print to the debug
console. Allows running a generic trusty binary.

Change-Id: I4b6540f140f11432cdff43c3f5a2097df09dc9d1
Signed-off-by: Arve Hjønnevåg <arve@android.com>

services/spd/trusty/generic-arm64-smcall.c

+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <debug.h>
+#include <runtime_svc.h>
+
+#include "generic-arm64-smcall.h"
+
+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 0:
+		return PLAT_ARM_GICD_BASE;
+
+	case 1:
+		return PLAT_ARM_GICC_BASE;
+
+	default:
+		NOTICE("%s(0x%x) unknown reg\n", __func__, reg);
+		return SMC_UNK;
+	}
+}
+
+static uint64_t trusty_generic_platform_smc(uint32_t smc_fid,
+			 uint64_t x1,
+			 uint64_t x2,
+			 uint64_t x3,
+			 uint64_t x4,
+			 void *cookie,
+			 void *handle,
+			 uint64_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
+);
+

services/spd/trusty/generic-arm64-smcall.h

+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "smcall.h"
+
+#define	SMC_ENTITY_PLATFORM_MONITOR	61
+
+/*
+ * SMC calls implemented by EL3 monitor
+ */
+
+/*
+ * Write character in r1 to debug console
+ */
+#define SMC_FC_DEBUG_PUTC	SMC_FASTCALL_NR(SMC_ENTITY_PLATFORM_MONITOR, 0x0)
+
+/*
+ * Get register base address
+ * r1: SMC_GET_GIC_BASE_GICD or SMC_GET_GIC_BASE_GICC
+ */
+#define SMC_GET_GIC_BASE_GICD	0
+#define SMC_GET_GIC_BASE_GICC	1
+#define SMC_FC_GET_REG_BASE	SMC_FASTCALL_NR(SMC_ENTITY_PLATFORM_MONITOR, 0x1)
+#define SMC_FC64_GET_REG_BASE	SMC_FASTCALL64_NR(SMC_ENTITY_PLATFORM_MONITOR, 0x1)

services/spd/trusty/trusty.mk

@@ -9,4 +9,8 @@ SPD_INCLUDES		:=
 SPD_SOURCES		:=	services/spd/trusty/trusty.c		\
 				services/spd/trusty/trusty_helpers.S
 
+ifeq (${TRUSTY_SPD_WITH_GENERIC_SERVICES},1)
+SPD_SOURCES		+=	services/spd/trusty/generic-arm64-smcall.c
+endif
+
 NEED_BL32		:=	yes