Merge changes from topic "mp/enhanced_pal_hw" into integration

* changes:
  plat/arm/fvp: populate pwr domain descriptor dynamically
  fconf: Extract topology node properties from HW_CONFIG dtb
  fconf: necessary modifications to support fconf in BL31 & SP_MIN
  fconf: enhancements to firmware configuration framework

plat/arm/board/fvp/include/fconf_hw_config_getter.h

+/*
+ * Copyright (c) 2020, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef FCONF_HW_CONFIG_GETTER_H
+#define FCONF_HW_CONFIG_GETTER_H
+
+#include <lib/fconf/fconf.h>
+
+/* Hardware Config related getter */
+#define hw_config__gicv3_config_getter(prop) gicv3_config.prop
+
+#define hw_config__topology_getter(prop) soc_topology.prop
+
+struct gicv3_config_t {
+	void *gicd_base;
+	void *gicr_base;
+};
+
+struct hw_topology_t {
+	uint32_t plat_cluster_count;
+	uint32_t cluster_cpu_count;
+	uint32_t plat_cpu_count;
+	uint32_t plat_max_pwr_level;
+};
+
+int fconf_populate_gicv3_config(uintptr_t config);
+int fconf_populate_topology(uintptr_t config);
+
+extern struct gicv3_config_t gicv3_config;
+extern struct hw_topology_t soc_topology;
+
+#endif /* FCONF_HW_CONFIG_GETTER_H */

plat/arm/board/fvp/include/platform_def.h

@@ -63,12 +63,12 @@
  */
 #if defined(IMAGE_BL31)
 # if SPM_MM
-#  define PLAT_ARM_MMAP_ENTRIES		9
+#  define PLAT_ARM_MMAP_ENTRIES		10
 #  define MAX_XLAT_TABLES		9
 #  define PLAT_SP_IMAGE_MMAP_REGIONS	30
 #  define PLAT_SP_IMAGE_MAX_XLAT_TABLES	10
 # else
-#  define PLAT_ARM_MMAP_ENTRIES		8
+#  define PLAT_ARM_MMAP_ENTRIES		9
 #  if USE_DEBUGFS
 #   define MAX_XLAT_TABLES		6
 #  else
@@ -76,7 +76,7 @@
 #  endif
 # endif
 #elif defined(IMAGE_BL32)
-# define PLAT_ARM_MMAP_ENTRIES		8
+# define PLAT_ARM_MMAP_ENTRIES		9
 # define MAX_XLAT_TABLES		5
 #elif !USE_ROMLIB
 # define PLAT_ARM_MMAP_ENTRIES		11

plat/arm/board/fvp/jmptbl.i

@@ -22,6 +22,8 @@ fdt     fdt_node_offset_by_compatible
 fdt     fdt_setprop_inplace_namelen_partial
 fdt     fdt_first_subnode
 fdt     fdt_next_subnode
+fdt     fdt_path_offset
+fdt     fdt_subnode_offset
 mbedtls mbedtls_asn1_get_alg
 mbedtls mbedtls_asn1_get_alg_null
 mbedtls mbedtls_asn1_get_bitstring_null

plat/arm/board/fvp/platform.mk

@@ -204,6 +204,12 @@ BL31_SOURCES		+=	drivers/arm/fvp/fvp_pwrc.c			\
 				${FVP_INTERCONNECT_SOURCES}			\
 				${FVP_SECURITY_SOURCES}
 
+# Support for fconf in BL31
+# Added separately from the above list for better readability
+BL31_SOURCES		+=	common/fdt_wrappers.c				\
+				lib/fconf/fconf.c				\
+				plat/arm/board/fvp/fconf/fconf_hw_config_getter.c
+
 ifeq (${FVP_USE_SP804_TIMER},1)
 BL31_SOURCES		+=	drivers/arm/sp804/sp804_delay_timer.c
 else

plat/arm/board/fvp/sp_min/fvp_sp_min_setup.c

 /*
- * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
+#include <assert.h>
+
+#include <bl32/sp_min/platform_sp_min.h>
+#include <common/debug.h>
+#include <lib/fconf/fconf.h>
 #include <plat/arm/common/plat_arm.h>
 
 #include "../fvp_private.h"
 
+uintptr_t hw_config_dtb;
+
 void plat_arm_sp_min_early_platform_setup(u_register_t arg0, u_register_t arg1,
 			u_register_t arg2, u_register_t arg3)
 {
@@ -30,4 +37,24 @@ void plat_arm_sp_min_early_platform_setup(u_register_t arg0, u_register_t arg1,
 	 * FVP PSCI code will enable coherency for other clusters.
 	 */
 	fvp_interconnect_enable();
+
+	hw_config_dtb = arg2;
+}
+
+void sp_min_plat_arch_setup(void)
+{
+	arm_sp_min_plat_arch_setup();
+
+	/*
+	 * For RESET_TO_SP_MIN systems, SP_MIN(BL32) is the first bootloader
+	 * to run. So there is no BL2 to load the HW_CONFIG dtb into memory
+	 * before control is passed to SP_MIN.
+	 * Also, BL2 skips loading HW_CONFIG dtb for BL2_AT_EL3 builds.
+	 */
+#if !RESET_TO_SP_MIN && !BL2_AT_EL3
+	assert(hw_config_dtb != 0U);
+
+	INFO("SP_MIN FCONF: HW_CONFIG address = %p\n", (void *)hw_config_dtb);
+	fconf_populate("HW_CONFIG", hw_config_dtb);
+#endif
 }

plat/arm/board/fvp/sp_min/sp_min-fvp.mk

 #
-# Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -18,4 +18,10 @@ BL32_SOURCES		+=	drivers/arm/fvp/fvp_pwrc.c			\
 				${FVP_INTERCONNECT_SOURCES}			\
 				${FVP_SECURITY_SOURCES}
 
+# Support for fconf in SP_MIN(BL32)
+# Added separately from the above list for better readability
+BL32_SOURCES		+=	common/fdt_wrappers.c				\
+				lib/fconf/fconf.c				\
+				plat/arm/board/fvp/fconf/fconf_hw_config_getter.c
+
 include plat/arm/common/sp_min/arm_sp_min.mk

plat/arm/common/arm_bl2_setup.c

@@ -61,7 +61,7 @@ void arm_bl2_early_platform_setup(uintptr_t tb_fw_config,
 
 	/* Fill the properties struct with the info from the config dtb */
 	if (tb_fw_config != 0U) {
-		fconf_populate(tb_fw_config);
+		fconf_populate("TB_FW", tb_fw_config);
 	}
 
 	/* Initialise the IO layer and register platform IO devices */

plat/arm/common/fconf/arm_fconf_io.c

@@ -138,6 +138,6 @@ int fconf_populate_arm_io_policies(uintptr_t config)
 	return 0;
 }
 
-FCONF_REGISTER_POPULATOR(arm_io, fconf_populate_arm_io_policies);
+FCONF_REGISTER_POPULATOR(TB_FW, arm_io, fconf_populate_arm_io_policies);
 
 #endif /* IMAGE_BL2 */

plat/arm/common/fconf/arm_fconf_sp.c

@@ -102,6 +102,6 @@ int fconf_populate_arm_sp(uintptr_t config)
 	return 0;
 }
 
-FCONF_REGISTER_POPULATOR(arm_sp, fconf_populate_arm_sp);
+FCONF_REGISTER_POPULATOR(TB_FW, arm_sp, fconf_populate_arm_sp);
 
 #endif /* IMAGE_BL2 */

plat/arm/common/sp_min/arm_sp_min_setup.c

@@ -217,7 +217,7 @@ void sp_min_plat_runtime_setup(void)
  * Perform the very early platform specific architectural setup here. At the
  * moment this only initializes the MMU
  ******************************************************************************/
-void sp_min_plat_arch_setup(void)
+void arm_sp_min_plat_arch_setup(void)
 {
 	const mmap_region_t bl_regions[] = {
 		MAP_BL_SP_MIN_TOTAL,
@@ -232,3 +232,8 @@ void sp_min_plat_arch_setup(void)
 
 	enable_mmu_svc_mon(0);
 }
+
+void sp_min_plat_arch_setup(void)
+{
+	arm_sp_min_plat_arch_setup();
+}