projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 217dd11e RB |
1 | /* |
| 2 | * Copyright (C) 2000,2001,2004 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. | |
| 217dd11e RB |
13 | */ |
| 14 | #include <linux/clocksource.h> | |
| 27acdea8 | 15 | #include <linux/sched_clock.h> |
| 217dd11e RB |
16 | |
| 17 | #include <asm/addrspace.h> | |
| 18 | #include <asm/io.h> | |
| 19 | #include <asm/time.h> | |
| 20 | ||
| 21 | #include <asm/sibyte/bcm1480_regs.h> | |
| 22 | #include <asm/sibyte/sb1250_regs.h> | |
| 23 | #include <asm/sibyte/bcm1480_int.h> | |
| 24 | #include <asm/sibyte/bcm1480_scd.h> | |
| 25 | ||
| 26 | #include <asm/sibyte/sb1250.h> | |
| 27 | ||
| 8e19608e | 28 | static cycle_t bcm1480_hpt_read(struct clocksource *cs) |
| 217dd11e RB |
29 | { |
| 30 | return (cycle_t) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT)); | |
| 31 | } | |
| 32 | ||
| 33 | struct clocksource bcm1480_clocksource = { | |
| 34 | .name = "zbbus-cycles", | |
| 70342287 | 35 | .rating = 200, |
| 217dd11e RB |
36 | .read = bcm1480_hpt_read, |
| 37 | .mask = CLOCKSOURCE_MASK(64), | |
| 38 | .flags = CLOCK_SOURCE_IS_CONTINUOUS, | |
| 39 | }; | |
| 40 | ||
| 27acdea8 DCZ |
41 | static u64 notrace sb1480_read_sched_clock(void) |
| 42 | { | |
| 43 | return __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT)); | |
| 44 | } | |
| 45 | ||
| 217dd11e RB |
46 | void __init sb1480_clocksource_init(void) |
| 47 | { | |
| 48 | struct clocksource *cs = &bcm1480_clocksource; | |
| 49 | unsigned int plldiv; | |
| 50 | unsigned long zbbus; | |
| 51 | ||
| 52 | plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG))); | |
| 53 | zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000); | |
| 75c4fd8c | 54 | clocksource_register_hz(cs, zbbus); |
| 27acdea8 DCZ |
55 | |
| 56 | sched_clock_register(sb1480_read_sched_clock, 64, zbbus); | |
| 217dd11e | 57 | } |