From dc4bee9600be22531fd3c5bec15f712eb2e7ed2d Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Mon, 20 Feb 2017 12:18:58 -0800 Subject: altos: Add stm-vga demo project Uses the VGA and PS/2 drivers to provide an interactive console. Signed-off-by: Keith Packard --- src/stm-vga/ao_lisp_os_save.c | 53 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 src/stm-vga/ao_lisp_os_save.c (limited to 'src/stm-vga/ao_lisp_os_save.c') diff --git a/src/stm-vga/ao_lisp_os_save.c b/src/stm-vga/ao_lisp_os_save.c new file mode 100644 index 00000000..7c853990 --- /dev/null +++ b/src/stm-vga/ao_lisp_os_save.c @@ -0,0 +1,53 @@ +/* + * Copyright © 2016 Keith Packard + * + * 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 +#include +#include + +extern uint8_t __flash__[]; + +/* saved variables to rebuild the heap + + ao_lisp_atoms + ao_lisp_frame_global + */ + +int +ao_lisp_os_save(void) +{ + int i; + + for (i = 0; i < AO_LISP_POOL_TOTAL; i += 256) { + uint32_t *dst = (uint32_t *) (void *) &__flash__[i]; + uint32_t *src = (uint32_t *) (void *) &ao_lisp_pool[i]; + + ao_flash_page(dst, src); + } + return 1; +} + +int +ao_lisp_os_restore_save(struct ao_lisp_os_save *save, int offset) +{ + memcpy(save, &__flash__[offset], sizeof (struct ao_lisp_os_save)); + return 1; +} + +int +ao_lisp_os_restore(void) +{ + memcpy(ao_lisp_pool, __flash__, AO_LISP_POOL_TOTAL); + return 1; +} -- cgit v1.2.3