feat(rme): read DRAM information from FVP DTB
This patch builds on the previous patch by implementing
support for reading NS DRAM layout of FVP model from
HW_CONFIG Device tree.
Macro _RMMD_MANIFEST_VERSION is renamed to
SET_RMMD_MANIFEST_VERSION to suppress MISRA-C
"rule MC3R1.D4.5: (advisory) Identifiers in
the same name space with overlapping visibility
should be typographically unambiguous" warning
Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com>
Change-Id: Ifc2461b4441a1efdd4b7c656ab4d15e62479f77b
diff --git a/plat/arm/board/fvp/fconf/fconf_hw_config_getter.c b/plat/arm/board/fvp/fconf/fconf_hw_config_getter.c
index 45e3b7e..43dc17b 100644
--- a/plat/arm/board/fvp/fconf/fconf_hw_config_getter.c
+++ b/plat/arm/board/fvp/fconf/fconf_hw_config_getter.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2020, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2023, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -18,6 +18,15 @@
struct hw_topology_t soc_topology;
struct uart_serial_config_t uart_serial_config;
struct cpu_timer_t cpu_timer;
+struct ns_dram_layout dram_layout;
+
+/*
+ * Each NS DRAM bank entry is 'reg' node property which is
+ * a sequence of (address, length) pairs of 32-bit values.
+ */
+#define DRAM_ENTRY_SIZE (4UL * sizeof(uint32_t))
+
+CASSERT(ARM_DRAM_NUM_BANKS == 2UL, ARM_DRAM_NUM_BANKS_mismatch);
#define ILLEGAL_ADDR ULL(~0)
@@ -293,7 +302,58 @@
return 0;
}
+int fconf_populate_dram_layout(uintptr_t config)
+{
+ int node, len;
+ const uint32_t *reg;
+
+ /* Necessary to work with libfdt APIs */
+ const void *hw_config_dtb = (const void *)config;
+
+ /* Find 'memory' node */
+ node = fdt_node_offset_by_prop_value(hw_config_dtb, -1, "device_type",
+ "memory", sizeof("memory"));
+ if (node < 0) {
+ WARN("FCONF: Unable to locate 'memory' node\n");
+ return node;
+ }
+
+ reg = fdt_getprop(hw_config_dtb, node, "reg", &len);
+ if (reg == NULL) {
+ ERROR("FCONF failed to read 'reg' property\n");
+ return len;
+ }
+
+ switch (len) {
+ case DRAM_ENTRY_SIZE:
+ /* 1 DRAM bank */
+ dram_layout.num_banks = 1UL;
+ break;
+ case 2UL * DRAM_ENTRY_SIZE:
+ /* 2 DRAM banks */
+ dram_layout.num_banks = 2UL;
+ break;
+ default:
+ ERROR("FCONF: Invalid 'memory' node\n");
+ return -FDT_ERR_BADLAYOUT;
+ }
+
+ for (unsigned long i = 0UL; i < dram_layout.num_banks; i++) {
+ int err = fdt_get_reg_props_by_index(
+ hw_config_dtb, node, (int)i,
+ &dram_layout.dram_bank[i].base,
+ (size_t *)&dram_layout.dram_bank[i].size);
+ if (err < 0) {
+ ERROR("FCONF: Failed to read 'reg' property #%lu of 'memory' node\n", i);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
FCONF_REGISTER_POPULATOR(HW_CONFIG, gicv3_config, fconf_populate_gicv3_config);
FCONF_REGISTER_POPULATOR(HW_CONFIG, topology, fconf_populate_topology);
FCONF_REGISTER_POPULATOR(HW_CONFIG, uart_config, fconf_populate_uart_config);
FCONF_REGISTER_POPULATOR(HW_CONFIG, cpu_timer, fconf_populate_cpu_timer);
+FCONF_REGISTER_POPULATOR(HW_CONFIG, dram_layout, fconf_populate_dram_layout);
diff --git a/plat/arm/board/fvp/fvp_common.c b/plat/arm/board/fvp/fvp_common.c
index e6d5b15..c7bf93e 100644
--- a/plat/arm/board/fvp/fvp_common.c
+++ b/plat/arm/board/fvp/fvp_common.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013-2022, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2023, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -12,6 +12,7 @@
#include <drivers/arm/gicv2.h>
#include <drivers/arm/sp804_delay_timer.h>
#include <drivers/generic_delay_timer.h>
+#include <fconf_hw_config_getter.h>
#include <lib/mmio.h>
#include <lib/smccc.h>
#include <lib/xlat_tables/xlat_tables_compat.h>
@@ -530,45 +531,72 @@
return (size_t)RMM_SHARED_SIZE;
}
-CASSERT(ARM_DRAM_BANKS_NUM == 2UL, ARM_DRAM_BANKS_NUM_mismatch);
-
-/* FVP DRAM banks */
-const struct dram_bank fvp_dram_banks[ARM_DRAM_BANKS_NUM] = {
- {ARM_PAS_2_BASE, ARM_PAS_2_SIZE},
- {ARM_PAS_4_BASE, ARM_PAS_4_SIZE}
-};
-
int plat_rmmd_load_manifest(struct rmm_manifest *manifest)
{
- uint64_t check_sum;
- struct dram_bank *bank_ptr;
+ uint64_t checksum, num_banks;
+ struct ns_dram_bank *bank_ptr;
assert(manifest != NULL);
+ /* Get number of DRAM banks */
+ num_banks = FCONF_GET_PROPERTY(hw_config, dram_layout, num_banks);
+ assert(num_banks <= ARM_DRAM_NUM_BANKS);
+
manifest->version = RMMD_MANIFEST_VERSION;
manifest->padding = 0U; /* RES0 */
manifest->plat_data = (uintptr_t)NULL;
- manifest->plat_dram.banks_num = ARM_DRAM_BANKS_NUM;
+ manifest->plat_dram.num_banks = num_banks;
- /* Array dram_banks[] follows dram_info structure */
- bank_ptr = (struct dram_bank *)
- ((uintptr_t)&manifest->plat_dram.check_sum +
- sizeof(manifest->plat_dram.check_sum));
+ /*
+ * Array ns_dram_banks[] follows ns_dram_info structure:
+ *
+ * +-----------------------------------+
+ * | offset | field | comment |
+ * +----------+-----------+------------+
+ * | 0 | version | 0x00000002 |
+ * +----------+-----------+------------+
+ * | 4 | padding | 0x00000000 |
+ * +----------+-----------+------------+
+ * | 8 | plat_data | NULL |
+ * +----------+-----------+------------+
+ * | 16 | num_banks | |
+ * +----------+-----------+ |
+ * | 24 | banks | plat_dram |
+ * +----------+-----------+ |
+ * | 32 | checksum | |
+ * +----------+-----------+------------+
+ * | 40 | base 0 | |
+ * +----------+-----------+ bank[0] |
+ * | 48 | size 0 | |
+ * +----------+-----------+------------+
+ * | 56 | base 1 | |
+ * +----------+-----------+ bank[1] |
+ * | 64 | size 1 | |
+ * +----------+-----------+------------+
+ */
+ bank_ptr = (struct ns_dram_bank *)
+ ((uintptr_t)&manifest->plat_dram.checksum +
+ sizeof(manifest->plat_dram.checksum));
+
+ manifest->plat_dram.banks = bank_ptr;
- manifest->plat_dram.dram_data = bank_ptr;
+ /* Calculate checksum of plat_dram structure */
+ checksum = num_banks + (uint64_t)bank_ptr;
- /* Copy FVP DRAM banks data to Boot Manifest */
- (void)memcpy((void *)bank_ptr, &fvp_dram_banks, sizeof(fvp_dram_banks));
+ /* Store FVP DRAM banks data in Boot Manifest */
+ for (unsigned long i = 0UL; i < num_banks; i++) {
+ uintptr_t base = FCONF_GET_PROPERTY(hw_config, dram_layout, dram_bank[i].base);
+ uint64_t size = FCONF_GET_PROPERTY(hw_config, dram_layout, dram_bank[i].size);
- /* Calculate check sum of plat_dram structure */
- check_sum = ARM_DRAM_BANKS_NUM + (uint64_t)bank_ptr;
+ bank_ptr[i].base = base;
+ bank_ptr[i].size = size;
- for (unsigned long i = 0UL; i < ARM_DRAM_BANKS_NUM; i++) {
- check_sum += bank_ptr[i].base + bank_ptr[i].size;
+ /* Update checksum */
+ checksum += base + size;
}
- /* Check sum must be 0 */
- manifest->plat_dram.check_sum = ~check_sum + 1UL;
+ /* Checksum must be 0 */
+ manifest->plat_dram.checksum = ~checksum + 1UL;
return 0;
}
diff --git a/plat/arm/board/fvp/include/fconf_hw_config_getter.h b/plat/arm/board/fvp/include/fconf_hw_config_getter.h
index ca85f7a..b7a1247 100644
--- a/plat/arm/board/fvp/include/fconf_hw_config_getter.h
+++ b/plat/arm/board/fvp/include/fconf_hw_config_getter.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2020, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2023, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -8,12 +8,16 @@
#define FCONF_HW_CONFIG_GETTER_H
#include <lib/fconf/fconf.h>
+#include <services/rmm_core_manifest.h>
+
+#include <plat/arm/common/arm_def.h>
/* Hardware Config related getter */
#define hw_config__gicv3_config_getter(prop) gicv3_config.prop
#define hw_config__topology_getter(prop) soc_topology.prop
#define hw_config__uart_serial_config_getter(prop) uart_serial_config.prop
#define hw_config__cpu_timer_getter(prop) cpu_timer.prop
+#define hw_config__dram_layout_getter(prop) dram_layout.prop
struct gicv3_config_t {
uint64_t gicd_base;
@@ -36,13 +40,21 @@
uint32_t clock_freq;
};
+struct ns_dram_layout {
+ uint64_t num_banks;
+ struct ns_dram_bank dram_bank[ARM_DRAM_NUM_BANKS];
+};
+
int fconf_populate_gicv3_config(uintptr_t config);
int fconf_populate_topology(uintptr_t config);
int fconf_populate_uart_config(uintptr_t config);
int fconf_populate_cpu_timer(uintptr_t config);
+int fconf_populate_dram_layout(uintptr_t config);
extern struct gicv3_config_t gicv3_config;
extern struct hw_topology_t soc_topology;
extern struct uart_serial_config_t uart_serial_config;
extern struct cpu_timer_t cpu_timer;
+extern struct ns_dram_layout dram_layout;
+
#endif /* FCONF_HW_CONFIG_GETTER_H */
diff --git a/plat/arm/board/fvp/jmptbl.i b/plat/arm/board/fvp/jmptbl.i
index 85e6e3a..927ffef 100644
--- a/plat/arm/board/fvp/jmptbl.i
+++ b/plat/arm/board/fvp/jmptbl.i
@@ -1,5 +1,5 @@
#
-# Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2018-2023, Arm Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@@ -21,6 +21,7 @@
fdt fdt_setprop_inplace
fdt fdt_check_header
fdt fdt_node_offset_by_compatible
+fdt fdt_node_offset_by_prop_value
fdt fdt_setprop_inplace_namelen_partial
fdt fdt_first_subnode
fdt fdt_next_subnode