diff options
author | Pavel V. Shatov <meisterpaul1@yandex.ru> | 2015-05-28 13:27:55 +0400 |
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committer | Pavel V. Shatov <meisterpaul1@yandex.ru> | 2015-05-28 13:27:55 +0400 |
commit | 12d4c45ff1c40d8d1c91bb5dcab3d0642f91057a (patch) | |
tree | d03f4d65be1188042a14db65274a40f759a72958 /novena-eim.h |
Diffstat (limited to 'novena-eim.h')
-rw-r--r-- | novena-eim.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/novena-eim.h b/novena-eim.h new file mode 100644 index 0000000..75613bf --- /dev/null +++ b/novena-eim.h @@ -0,0 +1,52 @@ +/* + * novena-eim.h + * ------------ + * This module contains the userland magic to set up and use the EIM bus. + * + * + * Author: Pavel Shatov + * Copyright (c) 2014-2015, NORDUnet A/S All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of the NORDUnet nor the names of its contributors may + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#define EIM_BASE_ADDR 0x08000000 + +/* Set up EIM bus. + * Returns 0 on success, -1 on failure. + */ +int eim_setup(void); + +/* Write a 32-bit word to EIM. + * If EIM is not set up correctly, this will abort with a bus error. + */ +void eim_write_32(off_t, uint32_t *); + +/* Read a 32-bit word from EIM. + * If EIM is not set up correctly, this will abort with a bus error. + */ +void eim_read_32(off_t, uint32_t *); |