goldfish:add kernel mode support

Signed-off-by: wanggang26 <[email protected]>

arch/arm/src/goldfish/Make.defs

@@ -22,4 +22,5 @@ include armv7-a/Make.defs
 
 # goldfish-specific C source files
 CHIP_CSRCS  = goldfish_boot.c goldfish_serial.c goldfish_irq.c goldfish_timer.c goldfish_memorymap.c
+CHIP_CSRCS += goldfish_pgalloc.c
 

arch/arm/src/goldfish/goldfish_pgalloc.c

@@ -0,0 +1,76 @@
+/****************************************************************************
+ * arch/arm/src/goldfish/goldfish_pgalloc.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/arch.h>
+#include <nuttx/config.h>
+
+#include <assert.h>
+#include <debug.h>
+
+#ifdef CONFIG_MM_PGALLOC
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Currently, page cache memory must be allocated in DRAM.  There are other
+ * possibilities, but the logic in this file will have to extended in order
+ * handle any other possibility.
+ */
+
+#ifndef CONFIG_ARCH_PGPOOL_MAPPING
+#  error CONFIG_ARCH_PGPOOL_MAPPING must be selected
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_allocate_pgheap
+ *
+ * Description:
+ *   If there is a page allocator in the configuration, then this function
+ *   must be provided by the platform-specific code.  The OS initialization
+ *   logic will call this function early in the initialization sequence to
+ *   get the page heap information needed to configure the page allocator.
+ *
+ * Input parameters:
+ *   heap_start - A double pointer to the start address of the pgheap
+ *   heap_size - A pointer to the size of the pgheap
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void up_allocate_pgheap(void **heap_start, size_t *heap_size)
+{
+  DEBUGASSERT(heap_start && heap_size);
+
+  *heap_start = (void *)CONFIG_ARCH_PGPOOL_PBASE;
+  *heap_size  = (size_t)CONFIG_ARCH_PGPOOL_SIZE;
+}
+
+#endif /* CONFIG_MM_PGALLOC */