~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/mips/kernel/csrc-sb1250.c

Version: ~ [ linux-5.19-rc3 ] ~ [ linux-5.18.5 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.48 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.123 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.199 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.248 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.284 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.319 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.302 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (C) 2000, 2001 Broadcom Corporation
  3  *
  4  * This program is free software; you can redistribute it and/or
  5  * modify it under the terms of the GNU General Public License
  6  * as published by the Free Software Foundation; either version 2
  7  * of the License, or (at your option) any later version.
  8  *
  9  * This program is distributed in the hope that it will be useful,
 10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12  * GNU General Public License for more details.
 13  *
 14  * You should have received a copy of the GNU General Public License
 15  * along with this program; if not, write to the Free Software
 16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 17  */
 18 #include <linux/clocksource.h>
 19 
 20 #include <asm/addrspace.h>
 21 #include <asm/io.h>
 22 #include <asm/time.h>
 23 
 24 #include <asm/sibyte/sb1250.h>
 25 #include <asm/sibyte/sb1250_regs.h>
 26 #include <asm/sibyte/sb1250_int.h>
 27 #include <asm/sibyte/sb1250_scd.h>
 28 
 29 #define SB1250_HPT_NUM          3
 30 #define SB1250_HPT_VALUE        M_SCD_TIMER_CNT /* max value */
 31 
 32 /*
 33  * The HPT is free running from SB1250_HPT_VALUE down to 0 then starts over
 34  * again.
 35  */
 36 static cycle_t sb1250_hpt_read(struct clocksource *cs)
 37 {
 38         unsigned int count;
 39 
 40         count = G_SCD_TIMER_CNT(__raw_readq(IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM, R_SCD_TIMER_CNT))));
 41 
 42         return SB1250_HPT_VALUE - count;
 43 }
 44 
 45 struct clocksource bcm1250_clocksource = {
 46         .name   = "bcm1250-counter-3",
 47         .rating = 200,
 48         .read   = sb1250_hpt_read,
 49         .mask   = CLOCKSOURCE_MASK(23),
 50         .flags  = CLOCK_SOURCE_IS_CONTINUOUS,
 51 };
 52 
 53 void __init sb1250_clocksource_init(void)
 54 {
 55         struct clocksource *cs = &bcm1250_clocksource;
 56 
 57         /* Setup hpt using timer #3 but do not enable irq for it */
 58         __raw_writeq(0,
 59                      IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
 60                                                  R_SCD_TIMER_CFG)));
 61         __raw_writeq(SB1250_HPT_VALUE,
 62                      IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
 63                                                  R_SCD_TIMER_INIT)));
 64         __raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
 65                      IOADDR(A_SCD_TIMER_REGISTER(SB1250_HPT_NUM,
 66                                                  R_SCD_TIMER_CFG)));
 67 
 68         clocksource_register_hz(cs, V_SCD_TIMER_FREQ);
 69 }
 70 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp