1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
// IBM_PROLOG_BEGIN_TAG
// This is an automatically generated prolog.
//
// $Source: src/include/kernel/vmmmgr.H $
//
// IBM CONFIDENTIAL
//
// COPYRIGHT International Business Machines Corp. 2010 - 2011
//
// p1
//
// Object Code Only (OCO) source materials
// Licensed Internal Code Source Materials
// IBM HostBoot Licensed Internal Code
//
// The source code for this program is not published or other-
// wise divested of its trade secrets, irrespective of what has
// been deposited with the U.S. Copyright Office.
//
// Origin: 30
//
// IBM_PROLOG_END
#ifndef __KERNEL_VMMMGR_H
#define __KERNEL_VMMMGR_H
#include <limits.h>
#include <sys/mmio.h>
#include <kernel/types.h>
#include <kernel/spinlock.H>
class MessageQueue;
class VmmManager
{
public:
/**
* Constants used throughout the virtual memory management classes
*/
enum VMM_CONSTS
{
ONE_MEG = 1 * 1024 * 1024,
FOUR_MEG = 4 * ONE_MEG,
EIGHT_MEG = 8 * ONE_MEG,
FULL_MEM_SIZE = FOUR_MEG,
// put the Page Table at the end of our memory space
PTSIZE = (1 << 18),
HTABORG = (FULL_MEM_SIZE - PTSIZE),
};
enum ACCESS_TYPES
{
NO_USER_ACCESS,
READ_O_ACCESS,
NORMAL_ACCESS,
CI_ACCESS,
RO_EXE_ACCESS,
};
static void init();
static void init_slb();
/**
* @brief Responsible for handling PTE misses.
*
* @param[in] t - Task causing the page fault.
* @param[in] effAddr - Effective address accessed to cause fault.
*
* @return true - PTE miss was successfully handled.
*
* If the PTE miss is not successfully handled, the exception
* handler should collect debug information and kill the task.
*/
static bool pteMiss(task_t* t, uint64_t effAddr);
static void* mmioMap(void*, size_t);
static int mmioUnmap(void*, size_t);
/**
* @brief Map a device into the device segment(2TB)
* @param ra[in] - Void pointer to real address to be mapped in
* @param i_devDataSize[in] - Size of device segment block
* @return void* - Pointer to beginning virtual address, NULL otherwise
*/
static void* devMap(void* ra, SEG_DATA_SIZES i_devDataSize);
/**
* @brief Unmap a device from the device segment(2TB)
* @param ea[in] - Void pointer to effective address
* @return int - 0 for successful unmap, non-zero otherwise
*/
static int devUnmap(void* ea);
/**
* @brief Allocates a block of virtual memory of the given size
* @param i_mq[in] - Message queue to be associated with the block
* @param i_va[in] - Base virtual address of the block to be allocated
* @param i_size[in] - Requested virtual memory size of the block
* @return int - 0 for successful block allocation, non-zero otherwise
*/
static int mmAllocBlock(MessageQueue* i_mq,void* i_va,uint64_t i_size);
/**
* @brief Find the phyiscal address bound to the given address
* @param[in] i_vaddr The address
* @return the physical address or -EFAULT @see errno.h
*/
static uint64_t findPhysicalAddress(uint64_t i_vaddr);
protected:
VmmManager();
~VmmManager() {};
/** @brief Get spinlock for memory subsystem.
* This is useful for passing to a deferred user-space message
* handler so that the subsystem code is SMP-safe when the message
* response is obtained.
*/
static Spinlock* getLock();
private:
Spinlock lock;
void initPTEs();
void initSDR1();
bool _pteMiss(task_t*, uint64_t);
/** See findPhysicalAddress */
uint64_t _findPhysicalAddress(uint64_t i_vaddr);
public:
friend class Block;
};
#endif
|
