aarch64/versal: Support DDRMC0 region 0 and 1

- Support DDRMC0 region 0 up to 2G in size

- Support DDRMC0 region 1 with DDR memory greater than 2G
  up to the DDRMC0 max amount

- Extend the heap with region 1's memory

Closes #4684

bsps/aarch64/xilinx-versal/include/bsp.h

@@ -47,6 +47,7 @@
 #ifndef ASM
 
 #include <bsp/default-initial-extension.h>
+#include <bsp/linker-symbols.h>
 #include <bsp/start.h>
 
 #include <rtems.h>
@@ -61,6 +62,14 @@ extern "C" {
 
 #define BSP_RESET_SMC
 
+/*
+ * DDRMC mapping
+ */
+LINKER_SYMBOL(bsp_r0_ram_base)
+LINKER_SYMBOL(bsp_r0_ram_end)
+LINKER_SYMBOL(bsp_r1_ram_base)
+LINKER_SYMBOL(bsp_r1_ram_end)
+
 /**
  * @brief Versal specific set up of the MMU.
  *

bsps/aarch64/xilinx-versal/start/bspstartmmu.c

@@ -38,6 +38,9 @@
 #include <bsp/aarch64-mmu.h>
 #include <libcpu/mmu-vmsav8-64.h>
 
+#include <rtems/malloc.h>
+#include <rtems/sysinit.h>
+
 BSP_START_DATA_SECTION static const aarch64_mmu_config_entry
 versal_mmu_config_table[] = {
   AARCH64_MMU_DEFAULT_SECTIONS,
@@ -57,6 +60,29 @@ versal_mmu_config_table[] = {
     .begin = 0xff000000U,
     .end = 0xffc00000U,
     .flags = AARCH64_MMU_DEVICE
+  }, { /* DDRMC0_region1_mem, if not used size is 0 and ignored */
+    .begin = (uintptr_t) bsp_r1_ram_base,
+    .end = (uintptr_t) bsp_r1_ram_end,
+    .flags = AARCH64_MMU_DATA_RW_CACHED
+  }
+};
+
+/*
+ * Create an MMU table to get the R1 base and end. This avoids
+ * relocation errors as the R1 addresses are in the upper A64 address
+ * space.
+ *
+ * The versal_mmu_config_table table cannot be used because the regions
+ * in that table have no identifiers to indicate which region is the
+ * the DDRMC0_region1_mem region.
+ */
+static const struct mem_region {
+  uintptr_t begin;
+  uintptr_t end;
+} bsp_r1_region[] = {
+  { /* DDRMC0_region1_mem, if not used size is 0 and ignored */
+    .begin = (uintptr_t) bsp_r1_ram_base,
+    .end = (uintptr_t) bsp_r1_ram_end,
   }
 };
 
@@ -78,3 +104,26 @@ versal_setup_mmu_and_cache( void )
 
   aarch64_mmu_enable();
 }
+
+void bsp_r1_heap_extend(void);
+void bsp_r1_heap_extend(void)
+{
+  const struct mem_region* r1 = &bsp_r1_region[0];
+  if (r1->begin != r1->end) {
+    rtems_status_code sc =
+      rtems_heap_extend((void*) r1->begin, r1->end - r1->begin);
+    if (sc != RTEMS_SUCCESSFUL) {
+      bsp_fatal(BSP_FATAL_HEAP_EXTEND_ERROR);
+    }
+  }
+}
+
+/*
+ * Initialise after the IDLE thread exists so the protected heap
+ * extend call has a valid context.
+ */
+RTEMS_SYSINIT_ITEM(
+  bsp_r1_heap_extend,
+  RTEMS_SYSINIT_IDLE_THREADS,
+  RTEMS_SYSINIT_ORDER_LAST
+);

bsps/include/bsp/fatal.h

@@ -73,6 +73,7 @@ typedef enum {
   BSP_FATAL_CONSOLE_INSTALL_1,
   BSP_FATAL_CONSOLE_REGISTER_DEV_2,
   BSP_FATAL_MMU_ADDRESS_INVALID,
+  BSP_FATAL_HEAP_EXTEND_ERROR,
 
   /* ARM fatal codes */
   BSP_ARM_A9MPCORE_FATAL_CLOCK_IRQ_INSTALL = BSP_FATAL_CODE_BLOCK(1),

spec/build/bsps/aarch64/xilinx-versal/linkcmds_lp64.yml

@@ -5,6 +5,7 @@ content: |
 
   /*
    * Copyright (C) 2021 Gedare Bloom <gedare@rtems.org>
+   * Copyright (C) 2022 Chris Johns <chrisj@rtems.org>
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
@@ -28,10 +29,41 @@ content: |
    * POSSIBILITY OF SUCH DAMAGE.
    */
 
+  /*
+   * The RAM supports 32G of DDR4 or LPDDR memory using DDRMC0.
+   *
+   * The DDR Conroller (DDRC) has two regions R0 and R1. R0 is
+   * in the A32 address space and R1 is in the A64 address space.
+   */
+  DDRMC0_REGION_0_BASE = 0x00000000000;
+  DDRMC0_REGION_0_LENGTH = 0x00080000000;
+  DDRMC0_REGION_1_BASE = 0x00800000000;
+  DDRMC0_REGION_1_LENGTH = 0x01000000000;
+
+  BSP_RAM_BASE = ${BSP_XILINX_VERSAL_RAM_BASE};
+
+  BSP_R0_RAM_BASE = DDRMC0_REGION_0_BASE;
+  BSP_R0_RAM_LENGTH =
+     ${BSP_XILINX_VERSAL_RAM_LENGTH} >= DDRMC0_REGION_0_LENGTH ?
+         DDRMC0_REGION_0_LENGTH - BSP_RAM_BASE : ${BSP_XILINX_VERSAL_RAM_LENGTH};
+  BSP_R0_RAM_END = BSP_RAM_BASE + BSP_R0_RAM_LENGTH;
+
+  BSP_R1_RAM_BASE = DDRMC0_REGION_1_BASE;
+  BSP_R1_RAM_LENGTH =
+     ${BSP_XILINX_VERSAL_RAM_LENGTH} >= DDRMC0_REGION_0_LENGTH ?
+         ${BSP_XILINX_VERSAL_RAM_LENGTH} - DDRMC0_REGION_0_LENGTH : 0;
+
+  AARCH64_MMU_TT_PAGES_SIZE = 0x1000 * ${AARCH64_MMU_TRANSLATION_TABLE_PAGES};
+
   MEMORY {
-    RAM       : ORIGIN = ${BSP_XILINX_VERSAL_RAM_BASE} + ${BSP_XILINX_VERSAL_LOAD_OFFSET}, LENGTH = ${BSP_XILINX_VERSAL_RAM_LENGTH} - ${BSP_XILINX_VERSAL_LOAD_OFFSET} - ${BSP_XILINX_VERSAL_NOCACHE_LENGTH} - (0x1000 * ${AARCH64_MMU_TRANSLATION_TABLE_PAGES})
+    RAM       : ORIGIN = BSP_RAM_BASE + ${BSP_XILINX_VERSAL_LOAD_OFFSET},
-    NOCACHE   : ORIGIN = ${BSP_XILINX_VERSAL_RAM_BASE} + ${BSP_XILINX_VERSAL_RAM_LENGTH} - (0x1000 * ${AARCH64_MMU_TRANSLATION_TABLE_PAGES}) - ${BSP_XILINX_VERSAL_NOCACHE_LENGTH}, LENGTH = ${BSP_XILINX_VERSAL_NOCACHE_LENGTH}
+                LENGTH = BSP_R0_RAM_LENGTH - ${BSP_XILINX_VERSAL_LOAD_OFFSET} - ${BSP_XILINX_VERSAL_NOCACHE_LENGTH} - AARCH64_MMU_TT_PAGES_SIZE
-    RAM_MMU   : ORIGIN = ${BSP_XILINX_VERSAL_RAM_BASE} + ${BSP_XILINX_VERSAL_RAM_LENGTH} - (0x1000 * ${AARCH64_MMU_TRANSLATION_TABLE_PAGES}), LENGTH = 0x1000 * ${AARCH64_MMU_TRANSLATION_TABLE_PAGES}
+    RAM1      : ORIGIN = BSP_R1_RAM_BASE,
+                LENGTH = BSP_R1_RAM_LENGTH
+    NOCACHE   : ORIGIN = BSP_RAM_BASE + BSP_R0_RAM_LENGTH - AARCH64_MMU_TT_PAGES_SIZE - ${BSP_XILINX_VERSAL_NOCACHE_LENGTH},
+                LENGTH = ${BSP_XILINX_VERSAL_NOCACHE_LENGTH}
+    RAM_MMU   : ORIGIN = BSP_R0_RAM_END - AARCH64_MMU_TT_PAGES_SIZE,
+                LENGTH = AARCH64_MMU_TT_PAGES_SIZE
   }
 
   REGION_ALIAS ("REGION_START",          RAM);
@@ -58,6 +90,11 @@ content: |
 
   bsp_vector_table_in_start_section = 1;
 
+  bsp_r0_ram_base = DDRMC0_REGION_0_BASE;
+  bsp_r0_ram_end = ORIGIN (RAM) + LENGTH (RAM);
+  bsp_r1_ram_base = ORIGIN (RAM1);
+  bsp_r1_ram_end = ORIGIN (RAM1) + LENGTH (RAM1);
+
   bsp_translation_table_base = ORIGIN (RAM_MMU);
   bsp_translation_table_end = ORIGIN (RAM_MMU) + LENGTH (RAM_MMU);
 
@@ -67,6 +104,7 @@ content: |
   INCLUDE linkcmds.base
 copyrights:
 - Copyright (C) 2021 Gedare Bloom <gedare@rtems.org>
+- Copyright (C) 2022 Chris Johns <chrisj@rtems.org>
 enabled-by: true
 install-path: ${BSP_LIBDIR}
 links: []