Re: [PATCH 1/3] soc: Support for NPS HW scheduling
From: Daniel Lezcano <hidden>
Date: 2016-10-21 13:52:17
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On Thu, Oct 13, 2016 at 05:52:28PM +0300, Noam Camus wrote:
From: Noam Camus <redacted> This header file is for NPS400 SoC. It includes macros for save/restore of HW scheduling. Control is done by writing core functional registers. This code was moved from arc/plat-eznps so it can be used from driver/clocksourec/, available only for CONFIG_EZNPS_MTM_EXT.
drivers/clocksource
quoted hunk ↗ jump to hunk
Signed-off-by: Noam Camus <redacted> --- include/soc/nps/mtm.h | 61 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 61 insertions(+), 0 deletions(-) create mode 100644 include/soc/nps/mtm.hdiff --git a/include/soc/nps/mtm.h b/include/soc/nps/mtm.h new file mode 100644 index 0000000..9327010 --- /dev/null +++ b/include/soc/nps/mtm.h@@ -0,0 +1,61 @@ +/* + * Copyright (c) 2016, Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * 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. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef SOC_NPS_MTM_H +#define SOC_NPS_MTM_H + +#define CTOP_INST_HWSCHD_OFF_R3 0x3B6F00BF +#define CTOP_INST_HWSCHD_RESTORE_R3 0x3E6F70C3 + +#define DEFINE_SCHD_FLAG(type, name) type name
What is the purpose of this macro ?
+static inline void hw_schd_save(unsigned int *flags)
+{
+ __asm__ __volatile__(
+ " .word %1\n"
+ " st r3,[%0]\n"
+ :
+ : "r"(flags), "i"(CTOP_INST_HWSCHD_OFF_R3)
+ : "r3", "memory");
+}
+
+static inline void hw_schd_restore(unsigned int flags)
+{
+ __asm__ __volatile__(
+ " mov r3, %0\n"
+ " .word %1\n"
+ :
+ : "r"(flags), "i"(CTOP_INST_HWSCHD_RESTORE_R3)
+ : "r3");
+}
+
+#endif /* SOC_NPS_MTM_H */
--
1.7.1