From d70a79fece4077c263a5773c8849ec60c6b649bc Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Fri, 11 Nov 2016 23:34:54 -0800 Subject: altos/lisp: Append a CRC to the saved image to validate on restore The CRC is actually of the ROM bits, so we can tell if the restored image relates to the currently running code. Signed-off-by: Keith Packard --- src/lambdakey-v1.0/ao_lisp_os_save.c | 53 ++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 src/lambdakey-v1.0/ao_lisp_os_save.c (limited to 'src/lambdakey-v1.0/ao_lisp_os_save.c') diff --git a/src/lambdakey-v1.0/ao_lisp_os_save.c b/src/lambdakey-v1.0/ao_lisp_os_save.c new file mode 100644 index 00000000..44138398 --- /dev/null +++ b/src/lambdakey-v1.0/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 *) &__flash__[i]; + uint32_t *src = (uint32_t *) &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