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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc/prom/palloc.c
downloadop-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sparc/prom/palloc.c')
-rw-r--r--arch/sparc/prom/palloc.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/sparc/prom/palloc.c b/arch/sparc/prom/palloc.c
new file mode 100644
index 0000000..84ce8bc
--- /dev/null
+++ b/arch/sparc/prom/palloc.c
@@ -0,0 +1,44 @@
+/* $Id: palloc.c,v 1.4 1996/04/25 06:09:48 davem Exp $
+ * 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 guarantees 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;
+}
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