fwk: Introduce input/output component

This change introduces the framework input/output (I/O) component, which
enables low-level read and write operations to arbitrary entities. This
component is available before the module runtime is available, and can
therefore be used for debugging module initialization routines and
console input/output (assuming an entity is available to handle it).

For documentation on the I/O component, see `<fwk_io.h>`.

This supplants much of the existing logging implementation, including
the `log` module, though the public logging component interface remains
largely the same. The "always-on backend"/"dynamic backend" concept has
been removed as the logging component now uses the I/O component under
the hood. See

For documentation on the Log component, see `<fwk_log.h>`.

Change-Id: I9cfcbe63220969b5a2f47333a89c8d1b287589ac
Signed-off-by: Chris Kay <chris.kay@arm.com>

5 files changed, 18 insertions, 47 deletions

diff --git a/product/sgm775/include/fmw_io.h b/product/sgm775/include/fmw_io.h
new file mode 100644
index 00000000..2650c1c2
--- /dev/null
+++ b/product/sgm775/include/fmw_io.h
@@ -0,0 +1,17 @@
+/*
+ * Arm SCP/MCP Software
+ * Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef FMW_IO_H
+#define FMW_IO_H
+
+#include <fwk_id.h>
+#include <fwk_module_idx.h>
+
+#define FMW_IO_STDIN_ID FWK_ID_ELEMENT(FWK_MODULE_IDX_PL011, 0)
+#define FMW_IO_STDOUT_ID FWK_ID_ELEMENT(FWK_MODULE_IDX_PL011, 0)
+
+#endif /* FMW_IO_H */
diff --git a/product/sgm775/scp_ramfw/config_log.c b/product/sgm775/scp_ramfw/config_log.c
deleted file mode 100644
index 01076d98..00000000
--- a/product/sgm775/scp_ramfw/config_log.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Arm SCP/MCP Software
- * Copyright (c) 2017-2020, Arm Limited and Contributors. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <mod_log.h>
-
-#include <fwk_id.h>
-#include <fwk_module.h>
-#include <fwk_module_idx.h>
-
-static const struct mod_log_config log_data = {
-    .device_id = FWK_ID_ELEMENT_INIT(FWK_MODULE_IDX_PL011, 0),
-    .api_id = FWK_ID_API_INIT(FWK_MODULE_IDX_PL011, 0),
-};
-
-struct fwk_module_config config_log = {
-    .data = &log_data,
-};
diff --git a/product/sgm775/scp_ramfw/firmware.mk b/product/sgm775/scp_ramfw/firmware.mk
index 34cecf8a..c731d3c8 100644
--- a/product/sgm775/scp_ramfw/firmware.mk
+++ b/product/sgm775/scp_ramfw/firmware.mk
@@ -18,7 +18,6 @@ BS_FIRMWARE_MODULES := \
     system_info \
     pcid \
     pl011 \
-    log \
     gtimer \
     timer \
     sgm775_ddr_phy500 \
@@ -55,7 +54,6 @@ endif
 BS_FIRMWARE_SOURCES := \
     rtx_config.c \
     sgm775_core.c \
-    config_log.c \
     config_pl011.c\
     config_timer.c \
     config_sgm775_ddr_phy500.c \
diff --git a/product/sgm775/scp_romfw/config_log.c b/product/sgm775/scp_romfw/config_log.c
deleted file mode 100644
index 01076d98..00000000
--- a/product/sgm775/scp_romfw/config_log.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Arm SCP/MCP Software
- * Copyright (c) 2017-2020, Arm Limited and Contributors. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <mod_log.h>
-
-#include <fwk_id.h>
-#include <fwk_module.h>
-#include <fwk_module_idx.h>
-
-static const struct mod_log_config log_data = {
-    .device_id = FWK_ID_ELEMENT_INIT(FWK_MODULE_IDX_PL011, 0),
-    .api_id = FWK_ID_API_INIT(FWK_MODULE_IDX_PL011, 0),
-};
-
-struct fwk_module_config config_log = {
-    .data = &log_data,
-};
diff --git a/product/sgm775/scp_romfw/firmware.mk b/product/sgm775/scp_romfw/firmware.mk
index 9e271f93..06471de2 100644
--- a/product/sgm775/scp_romfw/firmware.mk
+++ b/product/sgm775/scp_romfw/firmware.mk
@@ -19,7 +19,6 @@ BS_FIRMWARE_MODULES := sid \
                        ppu_v0 \
                        ppu_v1 \
                        pl011 \
-                       log \
                        gtimer \
                        msys_rom \
                        bootloader \
@@ -29,8 +28,7 @@ BS_FIRMWARE_MODULES := sid \
                        clock \
                        sds
 
-BS_FIRMWARE_SOURCES := config_log.c \
-                       config_pl011.c \
+BS_FIRMWARE_SOURCES := config_pl011.c \
                        config_timer.c \
                        config_msys_rom.c \
                        config_sds.c \