patch-1.3.4 linux/arch/sparc/prom/palloc.c

• Lines: 44
• Date: Wed Jun 7 11:55:55 1995
• Orig file: v1.3.3/linux/arch/sparc/prom/palloc.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.3/linux/arch/sparc/prom/palloc.c linux/arch/sparc/prom/palloc.c
@@ -0,0 +1,43 @@
+/* palloc.c:  Memory allocation from the Sun PROM.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+
+/* You should not call these routines after memory management
+ * has been initialized in the kernel, if fact you should not
+ * use these if at all possible in the kernel.  They are mainly
+ * to be used for a bootloader for temporary allocations which
+ * it will free before jumping into the kernel it has loaded.
+ *
+ * Also, these routines don't work on V0 proms, only V2 and later.
+ */
+
+/* Allocate a chunk of memory of size 'num_bytes' giving a suggestion
+ * of virtual_hint as the preferred virtual base address of this chunk.
+ * There are no guarentees that you will get the allocation, or that
+ * the prom will abide by your "hint".  So check your return value.
+ */
+char *
+prom_alloc(char *virtual_hint, unsigned int num_bytes)
+{
+	if(prom_vers == PROM_V0) return (char *) 0x0;
+	if(num_bytes == 0x0) return (char *) 0x0;
+	return (*(romvec->pv_v2devops.v2_dumb_mem_alloc))(virtual_hint, num_bytes);
+}
+
+/* Free a previously allocated chunk back to the prom at virtual address
+ * 'vaddr' of size 'num_bytes'.  NOTE: This vaddr is not the hint you
+ * used for the allocation, but the virtual address the prom actually
+ * returned to you.  They may be have been the same, they may have not,
+ * doesn't matter.
+ */
+void
+prom_free(char *vaddr, unsigned int num_bytes)
+{
+	if((prom_vers == PROM_V0) || (num_bytes == 0x0)) return;
+	(*(romvec->pv_v2devops.v2_dumb_mem_free))(vaddr, num_bytes);
+	return;
+}