xref: /openbmc/linux/arch/mips/include/asm/hpet.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_HPET_H
3 #define _ASM_HPET_H
4 
5 #ifdef CONFIG_RS780_HPET
6 
7 #define HPET_MMAP_SIZE		1024
8 
9 #define HPET_ID			0x000
10 #define HPET_PERIOD		0x004
11 #define HPET_CFG		0x010
12 #define HPET_STATUS		0x020
13 #define HPET_COUNTER	0x0f0
14 
15 #define HPET_Tn_CFG(n)		(0x100 + 0x20 * n)
16 #define HPET_Tn_CMP(n)		(0x108 + 0x20 * n)
17 #define HPET_Tn_ROUTE(n)	(0x110 + 0x20 * n)
18 
19 #define HPET_T0_IRS		0x001
20 #define HPET_T1_IRS		0x002
21 #define HPET_T3_IRS		0x004
22 
23 #define HPET_T0_CFG		0x100
24 #define HPET_T0_CMP		0x108
25 #define HPET_T0_ROUTE	0x110
26 #define HPET_T1_CFG		0x120
27 #define HPET_T1_CMP		0x128
28 #define HPET_T1_ROUTE	0x130
29 #define HPET_T2_CFG		0x140
30 #define HPET_T2_CMP		0x148
31 #define HPET_T2_ROUTE	0x150
32 
33 #define HPET_ID_REV			0x000000ff
34 #define HPET_ID_NUMBER		0x00001f00
35 #define HPET_ID_64BIT		0x00002000
36 #define HPET_ID_LEGSUP		0x00008000
37 #define HPET_ID_VENDOR		0xffff0000
38 #define HPET_ID_NUMBER_SHIFT	8
39 #define HPET_ID_VENDOR_SHIFT	16
40 
41 #define HPET_CFG_ENABLE		0x001
42 #define HPET_CFG_LEGACY		0x002
43 #define HPET_LEGACY_8254		2
44 #define HPET_LEGACY_RTC		8
45 
46 #define HPET_TN_LEVEL		0x0002
47 #define HPET_TN_ENABLE		0x0004
48 #define HPET_TN_PERIODIC	0x0008
49 #define HPET_TN_PERIODIC_CAP	0x0010
50 #define HPET_TN_64BIT_CAP	0x0020
51 #define HPET_TN_SETVAL		0x0040
52 #define HPET_TN_32BIT		0x0100
53 #define HPET_TN_ROUTE		0x3e00
54 #define HPET_TN_FSB			0x4000
55 #define HPET_TN_FSB_CAP		0x8000
56 #define HPET_TN_ROUTE_SHIFT	9
57 
58 /* Max HPET Period is 10^8 femto sec as in HPET spec */
59 #define HPET_MAX_PERIOD		100000000UL
60 /*
61  * Min HPET period is 10^5 femto sec just for safety. If it is less than this,
62  * then 32 bit HPET counter wrapsaround in less than 0.5 sec.
63  */
64 #define HPET_MIN_PERIOD		100000UL
65 
66 #define HPET_ADDR		0x20000
67 #define HPET_MMIO_ADDR	0x90000e0000020000
68 #define HPET_FREQ		14318780
69 #define HPET_COMPARE_VAL	((HPET_FREQ + HZ / 2) / HZ)
70 #define HPET_T0_IRQ		0
71 
72 extern void __init setup_hpet_timer(void);
73 #endif /* CONFIG_RS780_HPET */
74 #endif /* _ASM_HPET_H */
75