uniphier: support Socionext UniPhier platform
Initial commit for Socionext UniPhier SoC support. BL1, Bl2, and
BL31 are supported. Refer to docs/plat/socionext-uniphier.md for
more detais.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/plat/socionext/uniphier/uniphier_scp.c b/plat/socionext/uniphier/uniphier_scp.c
new file mode 100644
index 0000000..9a921c4
--- /dev/null
+++ b/plat/socionext/uniphier/uniphier_scp.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <mmio.h>
+#include <utils_def.h>
+
+#include "uniphier.h"
+
+#define UNIPHIER_ROM_RSV3 0x5980120c
+
+#define UNIPHIER_STMBE2COM 0x5f800030
+#define UNIPHIER_BETOSTMIRQ0PT 0x5f800070
+
+#define UNIPHIER_SCP_READY_MAGIC 0x0000b6a5
+
+#define UNIPHIER_SCP_PACKET_START 0xA0
+#define UNIPHIER_SCP_PACKET_END 0xA5
+#define UNIPHIER_SCP_PACKET_ESC 0xA6
+#define UNIPHIER_SCP_IS_CTRL_CODE(c) (0xA0 <= (c) && (c) <= 0xA6)
+
+int uniphier_scp_is_running(void)
+{
+ return mmio_read_32(UNIPHIER_STMBE2COM) == UNIPHIER_SCP_READY_MAGIC;
+}
+
+void uniphier_scp_start(void)
+{
+ uint32_t tmp;
+
+ mmio_write_32(UNIPHIER_STMBE2COM + 4, UNIPHIER_SCP_BASE);
+ mmio_write_32(UNIPHIER_STMBE2COM, UNIPHIER_SCP_READY_MAGIC);
+
+ do {
+ tmp = mmio_read_32(UNIPHIER_ROM_RSV3);
+ } while (!(tmp & BIT(8)));
+
+ mmio_write_32(UNIPHIER_ROM_RSV3, tmp | BIT(9));
+}
+
+static void uniphier_scp_send_packet(const uint8_t *packet, int packet_len)
+{
+ uintptr_t reg = UNIPHIER_STMBE2COM;
+ uint32_t word;
+ int len, i;
+
+ while (packet_len) {
+ len = MIN(packet_len, 4);
+ word = 0;
+
+ for (i = 0; i < len; i++)
+ word |= *packet++ << (8 * i);
+
+ mmio_write_32(reg, word);
+ reg += 4;
+ packet_len -= len;
+ }
+
+ mmio_write_8(UNIPHIER_BETOSTMIRQ0PT, 0x55);
+}
+
+static void uniphier_scp_send_cmd(const uint8_t *cmd, int cmd_len)
+{
+ uint8_t packet[32]; /* long enough */
+ uint8_t *p = packet;
+ uint8_t c;
+ int i;
+
+ *p++ = UNIPHIER_SCP_PACKET_START;
+ *p++ = cmd_len;
+
+ for (i = 0; i < cmd_len; i++) {
+ c = *cmd++;
+ if (UNIPHIER_SCP_IS_CTRL_CODE(c)) {
+ *p++ = UNIPHIER_SCP_PACKET_ESC;
+ *p++ = c ^ BIT(7);
+ } else {
+ *p++ = c;
+ }
+ }
+
+ *p++ = UNIPHIER_SCP_PACKET_END;
+
+ uniphier_scp_send_packet(packet, p - packet);
+}
+
+#define UNIPHIER_SCP_CMD(name, ...) \
+static const uint8_t __uniphier_scp_##name##_cmd[] = { \
+ __VA_ARGS__ \
+}; \
+void uniphier_scp_##name(void) \
+{ \
+ uniphier_scp_send_cmd(__uniphier_scp_##name##_cmd, \
+ ARRAY_SIZE(__uniphier_scp_##name##_cmd)); \
+}
+
+UNIPHIER_SCP_CMD(open_com, 0x00, 0x00, 0x05)
+UNIPHIER_SCP_CMD(system_off, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0x01)
+UNIPHIER_SCP_CMD(system_reset, 0x00, 0x02, 0x00)