source: soft/giet_vm/giet_drivers/xcu_driver.h @ 504

Last change on this file since 504 was 490, checked in by haoliu, 10 years ago

Implemented a new way to construct the ptabs in boot. In the map.bin file,
each physical segment in cluster[x][y] is handled by the processor[x][y][0]. So
the constrcuting of page table is done in parrallel by all the
processor[x][y][0] at the same time.

This way spents less time than the constructing sequential by one processor(
the processor[0][0][0])
File size: 7.4 KB
Line 
1///////////////////////////////////////////////////////////////////////////////////
2// File     : xcu_driver.h
3// Date     : 01/11/2013
4// Author   : alain greiner
5// Copyright (c) UPMC-LIP6
6///////////////////////////////////////////////////////////////////////////////////
7// The xcu_driver.c and xcu_driver.h files are part ot the GIET-VM nano-kernel.
8// This driver supports the SoCLib vci_xicu, that is a vectorised interrupt
9// controler supporting three types of interrupts:
10//
11// - HWI : HardWare Interrupts (from hardware peripherals)
12// - PTI : Programmable Timer Interrupts (contained in the XCU component)
13// - WTI : Write Trigered Interrupts (from software, or from a PIC controller)
14//
15// It can exist several interrupt controller unit in the architecture
16// (one per cluster), and each one can contain several channels:
17// The number of XICU channels is equal to NB_PROCS_MAX, because there is
18// one private XICU channel per processor in a cluster.
19//
20// The virtual base address of the segment associated to the component is:
21//
22//      vbase = SEG_XCU_BASE + cluster_xy * PERI_CLUSTER_INCREMENT
23//
24// The SEG_XCU_BSE  and PERI_CLUSTER_INCREMENT values must be defined
25// in the hard_config.h file.
26////////////////////////////////////////////////////////////////////////////////
27
28#ifndef _GIET_XCU_DRIVER_H_
29#define _GIET_XCU_DRIVER_H_
30
31///////////////////////////////////////////////////////////////////////////////////
32// XICU registers offsets
33///////////////////////////////////////////////////////////////////////////////////
34
35enum Xcu_registers
36{
37    XCU_WTI_REG = 0,
38    XCU_PTI_PER = 1,
39    XCU_PTI_VAL = 2,
40    XCU_PTI_ACK = 3,
41
42    XCU_MSK_PTI = 4,
43    XCU_MSK_PTI_ENABLE = 5,
44    XCU_MSK_PTI_DISABLE = 6,
45    XCU_PTI_ACTIVE = 6,
46
47    XCU_MSK_HWI = 8,
48    XCU_MSK_HWI_ENABLE = 9,
49    XCU_MSK_HWI_DISABLE = 10,
50    XCU_HWI_ACTIVE = 10,
51
52    XCU_MSK_WTI = 12,
53    XCU_MSK_WTI_ENABLE = 13,
54    XCU_MSK_WTI_DISABLE = 14,
55    XCU_WTI_ACTIVE = 14,
56
57    XCU_PRIO = 15,
58};
59
60#define XCU_REG(func, index) (((func)<<5)|(index))
61 
62////////////////////////////////////////////////////////////////////////////////
63//                           access functions
64////////////////////////////////////////////////////////////////////////////////
65
66////////////////////////////////////////////////////////////////////////////////
67// This function set the mask register for the IRQ type defined by "irq_type",
68// and for the channel identified by the "cluster_xy" and "channel" arguments.
69// All '1' bits are set / all '0' bits are not modified.
70////////////////////////////////////////////////////////////////////////////////
71extern void _xcu_set_mask( unsigned int cluster_xy,
72                           unsigned int channel, 
73                           unsigned int mask, 
74                           unsigned int irq_type );
75
76////////////////////////////////////////////////////////////////////////////////
77// This function returns the index and the type of the highest priority
78// - active PTI (Timer Interrupt), then
79// - active HWI (Hardware Interrupt), then
80// - active WTI (Software Interrupt)
81////////////////////////////////////////////////////////////////////////////////
82extern void _xcu_get_index( unsigned int   cluster_xy, 
83                            unsigned int   channel,   
84                            unsigned int * index,
85                            unsigned int * irq_type );
86
87////////////////////////////////////////////////////////////////////////////////
88// This function writes the "wdata" value in the mailbox defined
89// by the "cluster_xy" and "wti_index" arguments.
90////////////////////////////////////////////////////////////////////////////////
91extern void _xcu_send_wti( unsigned int cluster_xy,
92                           unsigned int wti_index,
93                           unsigned int wdata );
94
95///////////////////////////////////////////////////////////////////////////////
96// This function writes the "wdata" by physical xcu address value in the mailbox
97// defined by the "cluster_xy" and "wti_index" arguments.
98////////////////////////////////////////////////////////////////////////////////
99void _xcu_send_wti_paddr( unsigned int cluster_xy,
100                          unsigned int wti_index,
101                          unsigned int wdata );
102////////////////////////////////////////////////////////////////////////////////
103// This function returns the value contained in a WTI mailbox defined by
104// the cluster_xy and "wti_index" arguments. This value is written in
105// the "value" argument, and the corresponding WTI is acknowledged.
106////////////////////////////////////////////////////////////////////////////////
107extern void _xcu_get_wti_value( unsigned int   cluster_xy,
108                                unsigned int   wti_index,
109                                unsigned int * value );
110
111////////////////////////////////////////////////////////////////////////////////
112// This function returns the address of a WTI mailbox defined by
113// the "wti_index" argument, in the unsigned int "address" argument.
114// It is used by the GIET to configurate the IOPIC component.
115// There is no access to a specific XCU component in a specific cluster.
116////////////////////////////////////////////////////////////////////////////////
117extern void _xcu_get_wti_address( unsigned int   wti_index,
118                                  unsigned int * address );
119
120////////////////////////////////////////////////////////////////////////////////
121// This function activates a timer contained in XCU by writing in the
122// proper register the period value.
123////////////////////////////////////////////////////////////////////////////////
124extern void _xcu_timer_start( unsigned int cluster_xy, 
125                              unsigned int pti_index,
126                              unsigned int period ); 
127
128//////////////////////////////////////////////////////////////////////////////
129// This function desactivates a timer in XCU component
130// by writing in the proper register.
131//////////////////////////////////////////////////////////////////////////////
132extern void _xcu_timer_stop( unsigned int cluster_xy, 
133                             unsigned int pti_index ); 
134
135//////////////////////////////////////////////////////////////////////////////
136// This function acknowlegge a timer interrupt in XCU
137// component by reading in the proper XCU register.
138// It can be used by both the isr_switch() for a "system" timer,
139// or by the _isr_timer() for an "user" timer.
140//////////////////////////////////////////////////////////////////////////////
141extern unsigned int _xcu_timer_reset_irq( unsigned int cluster_xy, 
142                                          unsigned int pti_index );
143
144//////////////////////////////////////////////////////////////////////////////
145// This function resets a timer counter. To do so, we re-write the period
146// in the proper register, what causes the count to restart.
147// The period value is read from the same (TIMER_PERIOD) register,
148// this is why in appearance we do nothing useful (read a value
149// from a register and write this value in the same register).
150// This function is called during a context switch (user or preemptive)
151/////////////////////////////////////////////////////////////////////////////
152extern void _xcu_timer_reset_cpt( unsigned int cluster_xy, 
153                                  unsigned int pti_index ); 
154
155#endif
156
157// Local Variables:
158// tab-width: 4
159// c-basic-offset: 4
160// c-file-offsets:((innamespace . 0)(inline-open . 0))
161// indent-tabs-mode: nil
162// End:
163// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
164
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