altos: Add scheme for stm discovery board demo

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/src/stm-scheme-newlib/ao_scheme_os_save.c b/src/stm-scheme-newlib/ao_scheme_os_save.c
new file mode 100644
index 00000000..ce46f18e
--- /dev/null
+++ b/src/stm-scheme-newlib/ao_scheme_os_save.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright © 2016 Keith Packard <keithp@keithp.com>
+ *
+ * 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
+ * (at your option) 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.
+ */
+
+#include <ao.h>
+#include "ao_scheme.h"
+#include <ao_flash.h>
+
+extern uint8_t	__flash__[];
+
+/* saved variables to rebuild the heap
+
+   ao_scheme_atoms
+   ao_scheme_frame_global
+ */
+
+int
+ao_scheme_os_save(void)
+{
+	int i;
+
+	for (i = 0; i < AO_SCHEME_POOL_TOTAL; i += 256) {
+		uint32_t	*dst = (uint32_t *) (void *) &__flash__[i];
+		uint32_t	*src = (uint32_t *) (void *) &ao_scheme_pool[i];
+
+		ao_flash_page(dst, src);
+	}
+	return 1;
+}
+
+int
+ao_scheme_os_restore_save(struct ao_scheme_os_save *save, int offset)
+{
+	memcpy(save, &__flash__[offset], sizeof (struct ao_scheme_os_save));
+	return 1;
+}
+
+int
+ao_scheme_os_restore(void)
+{
+	memcpy(ao_scheme_pool, __flash__, AO_SCHEME_POOL_TOTAL);
+	return 1;
+}