--- /dev/null
+/*
+ * Copyright (c) 2018, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SPRT_COMMON_H
+#define SPRT_COMMON_H
+
+#define SPRT_MAX_MSG_ARGS 6
+
+/*
+ * Message types supported.
+ */
+#define SPRT_MSG_TYPE_SERVICE_HANDLE_OPEN 1
+#define SPRT_MSG_TYPE_SERVICE_HANDLE_CLOSE 2
+/* TODO: Add other types of SPRT messages. */
+#define SPRT_MSG_TYPE_SERVICE_TUN_REQUEST 10
+
+/*
+ * Struct that defines the layout of the fields corresponding to a request in
+ * shared memory.
+ */
+struct __attribute__((__packed__)) sprt_queue_entry_message {
+ uint32_t type; /* Type of message (result of an SPCI call). */
+ uint16_t client_id; /* SPCI client ID */
+ uint16_t service_handle;/* SPCI service handle */
+ uint32_t session_id; /* Optional SPCI session ID */
+ uint32_t token; /* SPCI request token */
+ uint64_t args[SPRT_MAX_MSG_ARGS];
+};
+
+#define SPRT_QUEUE_ENTRY_MSG_SIZE (sizeof(struct sprt_queue_entry_message))
+
+#define SPRT_QUEUE_NUM_BLOCKING 0
+#define SPRT_QUEUE_NUM_NON_BLOCKING 1
+
+#endif /* SPRT_COMMON_H */
--- /dev/null
+/*
+ * Copyright (c) 2018, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#ifndef SPRT_HOST_H
+#define SPRT_HOST_H
+
+#include <stddef.h>
+
+#include "sprt_common.h"
+
+/*
+ * Initialize the specified buffer to be used by SPM.
+ */
+void sprt_initialize_queues(void *buffer_base, size_t buffer_size);
+
+/*
+ * Push a message to the queue number `queue_num` in a buffer that has been
+ * initialized by `sprt_initialize_queues`.
+ */
+int sprt_push_message(void *buffer_base,
+ const struct sprt_queue_entry_message *message,
+ int queue_num);
+
+#endif /* SPRT_HOST_H */
--- /dev/null
+/*
+ * Copyright (c) 2018, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "sprt_common.h"
+#include "sprt_queue.h"
+
+void sprt_initialize_queues(void *buffer_base, size_t buffer_size)
+{
+ /* Initialize queue for blocking messages */
+
+ void *blocking_base = buffer_base;
+ uint32_t blocking_num = 4U;
+ size_t blocking_size = SPRT_QUEUE_HEADER_SIZE +
+ SPRT_QUEUE_ENTRY_MSG_SIZE * blocking_num;
+
+ sprt_queue_init(blocking_base, blocking_num, SPRT_QUEUE_ENTRY_MSG_SIZE);
+
+ /* Initialize queue for non-blocking messages */
+
+ void *non_blocking_base = (void *)((uintptr_t)blocking_base + blocking_size);
+ size_t non_blocking_size = buffer_size - blocking_size;
+ uint32_t non_blocking_num = (non_blocking_size - SPRT_QUEUE_HEADER_SIZE) /
+ SPRT_QUEUE_ENTRY_MSG_SIZE;
+
+ sprt_queue_init(non_blocking_base, non_blocking_num, SPRT_QUEUE_ENTRY_MSG_SIZE);
+}
+
+int sprt_push_message(void *buffer_base,
+ const struct sprt_queue_entry_message *message,
+ int queue_num)
+{
+ struct sprt_queue *q = buffer_base;
+
+ while (queue_num-- > 0) {
+ uintptr_t next_addr = (uintptr_t)q + sizeof(struct sprt_queue) +
+ q->entry_num * q->entry_size;
+ q = (struct sprt_queue *) next_addr;
+ }
+
+ return sprt_queue_push(q, message);
+}
--- /dev/null
+#
+# Copyright (c) 2018, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+SPRT_LIB_SOURCES := $(addprefix lib/sprt/, \
+ sprt_host.c \
+ sprt_queue.c)
+
+SPRT_LIB_INCLUDES := -Iinclude/lib/sprt/
--- /dev/null
+/*
+ * Copyright (c) 2018, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "sprt_queue.h"
+
+void sprt_queue_init(void *queue_base, uint32_t entry_num, uint32_t entry_size)
+{
+ assert(queue_base != NULL);
+ assert(entry_size > 0U);
+ assert(entry_num > 0U);
+
+ struct sprt_queue *queue = (struct sprt_queue *)queue_base;
+
+ queue->entry_num = entry_num;
+ queue->entry_size = entry_size;
+ queue->idx_write = 0U;
+ queue->idx_read = 0U;
+
+ memset(queue->data, 0, entry_num * entry_size);
+}
+
+int sprt_queue_is_empty(void *queue_base)
+{
+ assert(queue_base != NULL);
+
+ struct sprt_queue *queue = (struct sprt_queue *)queue_base;
+
+ return (queue->idx_write == queue->idx_read);
+}
+
+int sprt_queue_is_full(void *queue_base)
+{
+ assert(queue_base != NULL);
+
+ struct sprt_queue *queue = (struct sprt_queue *)queue_base;
+
+ uint32_t idx_next_write = (queue->idx_write + 1) % queue->entry_num;
+
+ return (idx_next_write == queue->idx_read);
+}
+
+int sprt_queue_push(void *queue_base, const void *entry)
+{
+ assert(entry != NULL);
+ assert(queue_base != NULL);
+
+ if (sprt_queue_is_full(queue_base) != 0) {
+ return -ENOMEM;
+ }
+
+ struct sprt_queue *queue = (struct sprt_queue *)queue_base;
+
+ uint8_t *dst_entry = &queue->data[queue->entry_size * queue->idx_write];
+
+ memcpy(dst_entry, entry, queue->entry_size);
+
+ /*
+ * Make sure that the message data is visible before increasing the
+ * counter of available messages.
+ */
+ __asm__ volatile("dmb st" ::: "memory");
+
+ queue->idx_write = (queue->idx_write + 1) % queue->entry_num;
+
+ __asm__ volatile("dmb st" ::: "memory");
+
+ return 0;
+}
+
+int sprt_queue_pop(void *queue_base, void *entry)
+{
+ assert(entry != NULL);
+ assert(queue_base != NULL);
+
+ if (sprt_queue_is_empty(queue_base) != 0) {
+ return -ENOENT;
+ }
+
+ struct sprt_queue *queue = (struct sprt_queue *)queue_base;
+
+ uint8_t *src_entry = &queue->data[queue->entry_size * queue->idx_read];
+
+ memcpy(entry, src_entry, queue->entry_size);
+
+ /*
+ * Make sure that the message data is visible before increasing the
+ * counter of read messages.
+ */
+ __asm__ volatile("dmb st" ::: "memory");
+
+ queue->idx_read = (queue->idx_read + 1) % queue->entry_num;
+
+ __asm__ volatile("dmb st" ::: "memory");
+
+ return 0;
+}
--- /dev/null
+/*
+ * Copyright (c) 2018, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SPRT_QUEUE_H
+#define SPRT_QUEUE_H
+
+#include <stdint.h>
+
+/* Struct that defines a queue. Not to be used directly. */
+struct __attribute__((__packed__)) sprt_queue {
+ uint32_t entry_num; /* Number of entries */
+ uint32_t entry_size; /* Size of an entry */
+ uint32_t idx_write; /* Index of first empty entry */
+ uint32_t idx_read; /* Index of first entry to read */
+ uint8_t data[0]; /* Start of data */
+};
+
+#define SPRT_QUEUE_HEADER_SIZE (sizeof(struct sprt_queue))
+
+/*
+ * Initializes a memory region to be used as a queue of the given number of
+ * entries with the specified size.
+ */
+void sprt_queue_init(void *queue_base, uint32_t entry_num, uint32_t entry_size);
+
+/* Returns 1 if the queue is empty, 0 otherwise */
+int sprt_queue_is_empty(void *queue_base);
+
+/* Returns 1 if the queue is full, 0 otherwise */
+int sprt_queue_is_full(void *queue_base);
+
+/*
+ * Pushes a new entry intro the queue. Returns 0 on success, -ENOMEM if the
+ * queue is full.
+ */
+int sprt_queue_push(void *queue_base, const void *entry);
+
+/*
+ * Pops an entry from the queue. Returns 0 on success, -ENOENT if the queue is
+ * empty.
+ */
+int sprt_queue_pop(void *queue_base, void *entry);
+
+#endif /* SPRT_QUEUE_H */
$(error "Error: SPM is only supported on aarch64.")
endif
+include lib/sprt/sprt_host.mk
+
SPM_SOURCES := $(addprefix services/std_svc/spm/, \
${ARCH}/spm_helpers.S \
${ARCH}/spm_shim_exceptions.S \
sp_xlat.c \
spci.c \
spm_main.c \
- sprt.c)
+ sprt.c) \
+ ${SPRT_LIB_SOURCES}
+INCLUDES += ${SPRT_LIB_INCLUDES}
# Force SMC Calling Convention 2 when using SPM
SMCCC_MAJOR_VERSION := 2
projects / project / bcm63xx / atf.git / commitdiff