1 files changed, 54 insertions, 0 deletions
diff --git a/src/arch/riscv/interface/sbi/sbi_umalloc.c b/src/arch/riscv/interface/sbi/sbi_umalloc.c
new file mode 100644
index 000000000..2f9935adb
--- /dev/null
+++ b/src/arch/riscv/interface/sbi/sbi_umalloc.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2024 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <stdlib.h>
+#include <ipxe/umalloc.h>
+
+/** @file
+ *
+ * iPXE user memory allocation API for SBI
+ *
+ */
+
+/** Equivalent of NOWHERE for user pointers */
+#define UNOWHERE ( ~UNULL )
+
+/**
+ * Reallocate external memory
+ *
+ * @v old_ptr		Memory previously allocated by umalloc(), or UNULL
+ * @v new_size		Requested size
+ * @ret new_ptr		Allocated memory, or UNULL
+ *
+ * Calling realloc() with a new size of zero is a valid way to free a
+ * memory block.
+ */
+static userptr_t sbi_urealloc ( userptr_t old_ptr, size_t new_size ) {
+
+	/* External allocation not yet implemented: allocate from heap */
+	return ( ( userptr_t ) realloc ( ( ( void * ) old_ptr ), new_size ) );
+}
+
+PROVIDE_UMALLOC ( sbi, urealloc, sbi_urealloc );