scoutos / prex-0.9.0 / bsp / hal / ppc / include / context.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 2009, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | #ifndef _PPC_CONTEXT_H
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31 | #define _PPC_CONTEXT_H
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32 | |||
33 | #ifndef __ASSEMBLY__
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34 | |||
35 | #include <sys/types.h> |
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36 | |||
37 | /*
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38 | * Common register frame for trap/interrupt.
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39 | * These cpu state are saved into top of the kernel stack in
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40 | * trap/interrupt entries. Since the arguments of system calls are
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41 | * passed via registers, the system call library is completely
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42 | * dependent on this register format.
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43 | */
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44 | struct cpu_regs {
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45 | uint32_t gr[32]; /* R0-R31 */ |
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46 | uint32_t lr; |
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47 | uint32_t cr; |
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48 | uint32_t xer; |
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49 | uint32_t ctr; |
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50 | uint32_t srr0; |
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51 | uint32_t srr1; |
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52 | uint32_t trap_no; /* trap number */
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53 | }; |
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54 | |||
55 | /*
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56 | * Kernel mode context for context switching.
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57 | */
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58 | struct kern_regs {
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59 | uint32_t gr[19]; /* R13-R31 */ |
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60 | uint32_t r2; |
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61 | uint32_t sp; |
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62 | uint32_t lr; |
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63 | uint32_t cr; |
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64 | uint32_t kstack; /* kernel stack */
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65 | }; |
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66 | |||
67 | /*
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68 | * Processor context
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69 | */
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70 | struct context {
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71 | struct kern_regs kregs; /* kernel mode registers */ |
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72 | struct cpu_regs *uregs; /* user mode registers */ |
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73 | struct cpu_regs *saved_regs; /* saved user mode registers */ |
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74 | }; |
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75 | |||
76 | typedef struct context *context_t; /* context id */ |
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77 | |||
78 | #endif /* !__ASSEMBLY__ */ |
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79 | |||
80 | #define REG_R0 0x00 |
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81 | #define REG_R1 0x04 |
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82 | #define REG_R2 0x08 |
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83 | #define REG_R3 0x0c |
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84 | #define REG_R4 0x10 |
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85 | #define REG_R5 0x14 |
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86 | #define REG_R6 0x18 |
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87 | #define REG_R7 0x1c |
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88 | #define REG_R8 0x20 |
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89 | #define REG_R9 0x24 |
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90 | #define REG_R10 0x28 |
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91 | #define REG_R11 0x2c |
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92 | #define REG_R12 0x30 |
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93 | #define REG_R13 0x34 |
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94 | #define REG_R14 0x38 |
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95 | #define REG_R15 0x3c |
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96 | #define REG_R16 0x40 |
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97 | #define REG_R17 0x44 |
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98 | #define REG_R18 0x48 |
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99 | #define REG_R19 0x4c |
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100 | #define REG_R20 0x50 |
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101 | #define REG_R21 0x54 |
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102 | #define REG_R22 0x58 |
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103 | #define REG_R23 0x5c |
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104 | #define REG_R24 0x60 |
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105 | #define REG_R25 0x64 |
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106 | #define REG_R26 0x68 |
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107 | #define REG_R27 0x6c |
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108 | #define REG_R28 0x70 |
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109 | #define REG_R29 0x74 |
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110 | #define REG_R30 0x78 |
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111 | #define REG_R31 0x7c |
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112 | #define REG_LR 0x80 |
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113 | #define REG_CR 0x84 |
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114 | #define REG_XER 0x88 |
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115 | #define REG_CTR 0x8c |
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116 | #define REG_SRR0 0x90 |
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117 | #define REG_SRR1 0x94 |
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118 | #define CTX_TRAPNO 0x98 |
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119 | |||
120 | #define CTXREGS (4*39) |
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121 | |||
122 | #endif /* !_PPC_CONTEXT_H */ |