Dynamic stack support.

    - Create stack segment.
    - Allocate stack blocks on stack create.

Change-Id: Ida90055afb68f208c479b5fdc19d3d931d026105
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/271
Tested-by: Jenkins Server
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/include/kernel/block.H b/src/include/kernel/block.H
index 3745b065e..94daf0b3a 100644
--- a/src/include/kernel/block.H
+++ b/src/include/kernel/block.H
@@ -169,11 +169,22 @@ class Block
          * @param[in] i_vAddr - The virtual address of the page.
          * @param[in] i_pAddr - The physical address of the page.
          * @param[in] i_access - The permissions of the page.
+         *
+         * @note If (i_pAddr == 0), then the virtual page is left with
+         *       the current present / page-number state but the access
+         *       mode is still set.
          */
         void setPhysicalPage(uint64_t i_vAddr, uint64_t i_pAddr,
                              VmmManager::ACCESS_TYPES i_access);
 
         /**
+         * @brief Set up a virtual address to be "allocate-from-zero".
+         *
+         * @param[in] i_vAddr - The virtual address of the page.
+         */
+        void setPageAllocateFromZero(uint64_t i_vAddr);
+
+        /**
          * @brief Adds up the total size of all blocks within the segment
          *
          * @param[in/out] io_totalSize - total size allocated within segment
@@ -185,6 +196,12 @@ class Block
             else iv_nextBlock->totalBlocksAlloc(io_totalSize);
         }
 
+        /**
+         * @brief Release all allocated pages back to memory pool and remove
+         *        from page table.
+         */
+        void releaseAllPages();
+
     private:
             /** Base address of the block */
         const uint64_t iv_baseAddr;