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c21c3b53 PC |
1 | /* |
2 | * Global peripheral timer block for ARM A9MP | |
3 | * | |
4 | * (C) 2013 Xilinx Inc. | |
5 | * | |
6 | * Written by François LEGAL | |
7 | * Written by Peter Crosthwaite <peter.crosthwaite@xilinx.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, see <http://www.gnu.org/licenses/>. | |
21 | */ | |
22 | ||
23 | #ifndef HW_TIMER_A9_GTIMER_H_H | |
24 | #define HW_TIMER_A9_GTIMER_H_H | |
25 | ||
26 | #include "hw/sysbus.h" | |
27 | ||
28 | #define A9_GTIMER_MAX_CPUS 4 | |
29 | ||
30 | #define TYPE_A9_GTIMER "arm.cortex-a9-global-timer" | |
31 | #define A9_GTIMER(obj) OBJECT_CHECK(A9GTimerState, (obj), TYPE_A9_GTIMER) | |
32 | ||
33 | #define R_COUNTER_LO 0x00 | |
34 | #define R_COUNTER_HI 0x04 | |
35 | ||
36 | #define R_CONTROL 0x08 | |
37 | #define R_CONTROL_TIMER_ENABLE (1 << 0) | |
38 | #define R_CONTROL_COMP_ENABLE (1 << 1) | |
39 | #define R_CONTROL_IRQ_ENABLE (1 << 2) | |
40 | #define R_CONTROL_AUTO_INCREMENT (1 << 2) | |
41 | #define R_CONTROL_PRESCALER_SHIFT 8 | |
42 | #define R_CONTROL_PRESCALER_LEN 8 | |
43 | #define R_CONTROL_PRESCALER_MASK (((1 << R_CONTROL_PRESCALER_LEN) - 1) << \ | |
44 | R_CONTROL_PRESCALER_SHIFT) | |
45 | ||
46 | #define R_CONTROL_BANKED (R_CONTROL_COMP_ENABLE | \ | |
47 | R_CONTROL_IRQ_ENABLE | \ | |
48 | R_CONTROL_AUTO_INCREMENT) | |
49 | #define R_CONTROL_NEEDS_SYNC (R_CONTROL_TIMER_ENABLE | \ | |
50 | R_CONTROL_PRESCALER_MASK) | |
51 | ||
52 | #define R_INTERRUPT_STATUS 0x0C | |
53 | #define R_COMPARATOR_LO 0x10 | |
54 | #define R_COMPARATOR_HI 0x14 | |
55 | #define R_AUTO_INCREMENT 0x18 | |
56 | ||
57 | typedef struct A9GTimerPerCPU A9GTimerPerCPU; | |
58 | typedef struct A9GTimerState A9GTimerState; | |
59 | ||
60 | struct A9GTimerPerCPU { | |
61 | A9GTimerState *parent; | |
62 | ||
63 | uint32_t control; /* only per cpu banked bits valid */ | |
64 | uint64_t compare; | |
65 | uint32_t status; | |
66 | uint32_t inc; | |
67 | ||
68 | MemoryRegion iomem; | |
69 | qemu_irq irq; /* PPI interrupts */ | |
70 | }; | |
71 | ||
72 | struct A9GTimerState { | |
73 | /*< private >*/ | |
74 | SysBusDevice parent_obj; | |
75 | /*< public >*/ | |
76 | ||
77 | MemoryRegion iomem; | |
78 | /* static props */ | |
79 | uint32_t num_cpu; | |
80 | ||
81 | QEMUTimer *timer; | |
82 | ||
83 | uint64_t counter; /* current timer value */ | |
84 | ||
85 | uint64_t ref_counter; | |
86 | uint64_t cpu_ref_time; /* the cpu time as of last update of ref_counter */ | |
87 | uint32_t control; /* only non per cpu banked bits valid */ | |
88 | ||
89 | A9GTimerPerCPU per_cpu[A9_GTIMER_MAX_CPUS]; | |
90 | }; | |
91 | ||
92 | typedef struct A9GTimerUpdate { | |
93 | uint64_t now; | |
94 | uint64_t new; | |
95 | } A9GTimerUpdate; | |
96 | ||
97 | #endif /* #ifdef HW_TIMER_A9_GTIMER_H_H */ |