Merge branch 'devel'

[palacios.git] / kitten / user / liblwk / pmem.c

diff --git a/kitten/user/liblwk/pmem.c b/kitten/user/liblwk/pmem.c
new file mode 100644 (file)
index 0000000..800ffaf
--- /dev/null
+++ b/kitten/user/liblwk/pmem.c
@@ -0,0 +1,67 @@
+/* Copyright (c) 2008, Sandia National Laboratories */
+
+#include <lwk/liblwk.h>
+
+const char *
+pmem_type_to_string(pmem_type_t type)
+{
+       switch(type) {
+               case PMEM_TYPE_BOOTMEM:     return "BOOTMEM";     break;
+               case PMEM_TYPE_BIGPHYSAREA: return "BIGPHYSAREA"; break;
+               case PMEM_TYPE_INITRD:      return "INITRD";      break;
+               case PMEM_TYPE_INIT_TASK:   return "INIT_TASK";   break;
+               case PMEM_TYPE_KMEM:        return "KMEM";        break;
+               case PMEM_TYPE_UMEM:        return "UMEM";        break;
+       }
+       return "UNKNOWN";
+}
+
+void
+pmem_region_unset_all(struct pmem_region *rgn)
+{
+       rgn->type_is_set      = false;
+       rgn->lgroup_is_set    = false;
+       rgn->allocated_is_set = false;
+       rgn->name_is_set      = false;
+}
+
+int
+pmem_alloc_umem(size_t size, size_t alignment, struct pmem_region *rgn)
+{
+       struct pmem_region constraint, result;
+
+       /* Find and allocate a chunk of PMEM_TYPE_UMEM physical memory */
+       pmem_region_unset_all(&constraint);
+       constraint.start     = 0;
+       constraint.end       = (paddr_t)(-1);
+       constraint.type      = PMEM_TYPE_UMEM; constraint.type_is_set = true;
+       constraint.allocated = false;          constraint.allocated_is_set = true;
+
+       if (pmem_alloc(size, alignment, &constraint, &result))
+               return -ENOMEM;
+
+       *rgn = result;
+       return 0;
+}
+
+bool
+pmem_is_umem(paddr_t start, size_t extent)
+{
+       struct pmem_region query, result;
+       int status;
+
+       pmem_region_unset_all(&query);
+       query.start = start;
+       query.end   = start + extent;
+       query.type  = PMEM_TYPE_UMEM; query.type_is_set = true; 
+       result.end  = 0;
+
+       while ((status = pmem_query(&query, &result)) == 0) {
+               if (result.start != query.start)
+                       return false;
+               if (result.end == query.end)
+                       break;
+               query.start = result.end;
+       }
+       return (status) ? false : true;
+}