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1 | /* |
2 | * ========== Copyright Header Begin ========================================== | |
3 | * | |
4 | * OpenSPARC T2 Processor File: SS_Signal.h | |
5 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
6 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. | |
7 | * | |
8 | * The above named program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public | |
10 | * License version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * The above named program is distributed in the hope that it will be | |
13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public | |
18 | * License along with this work; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
20 | * | |
21 | * ========== Copyright Header End ============================================ | |
22 | */ | |
23 | #ifndef __SS_Signal_h__ | |
24 | #define __SS_Signal_h__ | |
25 | ||
26 | #include "BL_Mutex.h" | |
27 | #include "SS_BreakPoint.h" | |
28 | #include "SS_Tte.h" | |
29 | #include "SS_Trap.h" | |
30 | ||
31 | class SS_Tlb; | |
32 | class SS_Strand; | |
33 | ||
34 | class SS_Signal | |
35 | { | |
36 | public: | |
37 | // The Type are the signal types used in Vonk to tell a | |
38 | // strand to do something before the next instruction | |
39 | ||
40 | enum Type | |
41 | { | |
42 | FREE, // Explict free signal | |
43 | RUNNING, // Change in running status of the strand | |
44 | FLUSH_TTE, // Tell the strand to remove cached TTE from decode cache | |
45 | FLUSH_VA, // Tell the strand to flush the opcode(2) (64 bit) at given va | |
46 | FLUSH_8B, // Tell the strand to flush 8 bytes at given pa | |
47 | FLUSH_8K, // Tell the strand to flush an 8k page at given pa | |
48 | FLUSH_ALL, // Tell the strand to flush the whole Icache (decode cache) | |
49 | BREAKPOINT, // Tell the strand it hit a breakpoint | |
50 | EXTERNAL_INTERRUPT, // An external interrupt (cross call, dev mondo, ..) | |
51 | SET_INST_BRKPT // Update sim_state.ib_enabled(x) | |
52 | }; | |
53 | ||
54 | SS_Signal( Type t ) : type(t), next(0) {} | |
55 | ||
56 | void init( Type t, SS_Signal* n=0 ) { type =t; next = n; } | |
57 | ||
58 | Type type; | |
59 | SS_Signal* next; // Link the signals in a list | |
60 | ||
61 | union | |
62 | { | |
63 | bool running; // New running status | |
64 | bool ib_enable; // New inst breakpoint check status | |
65 | SS_BreakPoint* breakpoint; // The breakpoint that hit | |
66 | int_t irq_type; // The (trap) type of the interrupt | |
67 | SS_Tte* tte; // The TTE to demap from decode cache, 0 is all TTEs | |
68 | SS_Vaddr flush_va; // The va of the double word to flush from the icache | |
69 | SS_Paddr flush_pa; // The va of the double word to flush from the icache | |
70 | }; | |
71 | union | |
72 | { | |
73 | SS_Tlb* tlb; // Flush tte flush from which tlb | |
74 | bool irq_raise; // True raise irq, False retract irq | |
75 | }; | |
76 | ||
77 | void dump(); | |
78 | ||
79 | static SS_Signal* free_list; | |
80 | static BL_Mutex free_mutex; | |
81 | ||
82 | static SS_Signal* alloc_block(); | |
83 | static const uint_t NR_BLOCK_SIGNAL = 256; | |
84 | ||
85 | ||
86 | // alloc() returns a SS_Signal instance with type set to type. | |
87 | // Don't use this function if you have direct access to a SS_Strand. | |
88 | // Use s->msg.make_signal(type) if you can. | |
89 | ||
90 | inline static SS_Signal* alloc( SS_Signal::Type type ) | |
91 | { | |
92 | free_mutex.lock(); | |
93 | SS_Signal* help = free_list; | |
94 | if (help == 0) | |
95 | help = alloc_block(); | |
96 | else | |
97 | free_list = help->next; | |
98 | free_mutex.unlock(); | |
99 | help->init(type); | |
100 | return help; | |
101 | } | |
102 | ||
103 | // frees a list of SS_Signal blocks | |
104 | // All elements of the list to free must be marked as type=FREE. | |
105 | inline static void list_free( SS_Signal* head, SS_Signal* tail ) | |
106 | { | |
107 | free_mutex.lock(); | |
108 | tail->next = free_list; | |
109 | free_list = head; | |
110 | free_mutex.unlock(); | |
111 | } | |
112 | }; | |
113 | ||
114 | #endif |