Subversion Repositories HelenOS-historic

Rev

Rev 1058 | Rev 1071 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 1058 Rev 1068
Line 44... Line 44...
44 
 
 44 
 
45 
jump_to_kernel:
 45 
jump_to_kernel:
46
46
47 
	# r3 = memmap (pa)
 47 
	# r3 = memmap (pa)
48 
	# r4 = trans (pa)
 48 
	# r4 = trans (pa)
49 
	# r5 = number of kernel pages
 49 
	# r5 = kernel size
50 
	# r6 = real_mode (pa)
 50 
	# r6 = real_mode (pa)
51
51
52 
	mtspr srr0, r6
 52 
	mtspr srr0, r6
53
53
54 
	# jumps to real_mode
 54 
	# jumps to real_mode
Line 67... Line 67...
67 
real_mode:
 67 
real_mode:
68
68
69 
	# copy kernel to proper location
 69 
	# copy kernel to proper location
70 
	#
 70 
	#
71 
	# r4 = trans (pa)
 71 
	# r4 = trans (pa)
72 
	# r5 = number of kernel pages
 72 
	# r5 = kernel size
73
73
74 
	li r31, PAGE_SIZE >> 3
 74 
	li r31, PAGE_SIZE >> 2
75 
	li r30, 0
 75 
	li r30, 0
76
76
77 
	page_copy:
 77 
	page_copy:
78
78
79 
		cmpwi r5, 0
 79 
		cmpwi r5, 0
80 
		beq copy_end
 80 
		beq copy_end
81
81
82 
		# copy single page
 82 
		# copy page
83
83
84 
		mtctr r31
 84 
		mtctr r31
85 
		lwz r29, 0(r4)
 85 
		lwz r29, 0(r4)
86
86
87 
		copy_loop:
 87 
		copy_loop:
Line 89... Line 89...
89 
			lwz r28, 0(r29)
 89 
			lwz r28, 0(r29)
90 
			stw r28, 0(r30)
 90 
			stw r28, 0(r30)
91
91
92 
			addi r29, r29, 4
 92 
			addi r29, r29, 4
93 
			addi r30, r30, 4
 93 
			addi r30, r30, 4
- 
 
 94 
			subi r5, r5, 4
- 
 
 95
- 
 
 96 
			cmpwi r5, 0
- 
 
 97 
			beq copy_end
94
98
95 
			bdnz copy_loop
 99 
			bdnz copy_loop
96
100
97 
		subi r5, r5, 1
 - 
 
98 
		addi r4, r4, 4
 101 
		addi r4, r4, 4
99 
		b page_copy
 102 
		b page_copy
100
103
101 
	copy_end:
 104 
	copy_end:
102
105
103 
	# fill segment registers
 106 
	# invalidate segment registers
104 
 
 107 
 
105 
	li r31, 16
 108 
#	li r31, 16
106 
	mtctr r31
 109 
#	mtctr r31
107 
	li r31, 0
 110 
#	li r31, 0
108 
	li r30, 0x2000
 111 
#	li r30, 0
109
112
110 
	seg_fill:
 113 
	seg_fill:
111
114
112 
		mtsrin r30, r31
 115 
#		mtsrin r30, r31
- 
 
 116 
#		addis r31, r31, 0x1000    # move to next SR
113
117 
#
- 
 
 118 
#		bdnz seg_fill
- 
 
 119
114 
		addis r31, r31, 0x1000    # add 256 MB
 120 
	# invalidate block address translation registers
- 
 
 121
- 
 
 122 
	mtspr ibat0u, r30
- 
 
 123 
	mtspr ibat0l, r30
- 
 
 124
- 
 
 125 
	mtspr ibat1u, r30
- 
 
 126 
	mtspr ibat1l, r30
- 
 
 127
- 
 
 128 
	mtspr ibat2u, r30
- 
 
 129 
	mtspr ibat2l, r30
- 
 
 130
- 
 
 131 
	mtspr ibat3u, r30
- 
 
 132 
	mtspr ibat3l, r30
- 
 
 133
- 
 
 134 
	mtspr dbat0u, r30
115 
		addi  r30, r30, 0x111     # move to next SR
 135 
	mtspr dbat0l, r30
- 
 
 136
- 
 
 137 
	mtspr dbat1u, r30
- 
 
 138 
	mtspr dbat1l, r30
- 
 
 139
- 
 
 140 
	mtspr dbat2u, r30
- 
 
 141 
	mtspr dbat2l, r30
116
142
- 
 
 143 
	mtspr dbat3u, r30
117 
		bdnz seg_fill
 144 
	mtspr dbat3l, r30
118
145
119 
	# create identity mapping
 146 
	# create identity mapping
120
147
- 
 
 148 
	# FIXME: map exactly the size of RAM
- 
 
 149
- 
 
 150 
	lis r31, 0x8000
- 
 
 151 
	ori r31, r31, 0x0ffe
- 
 
 152
- 
 
 153 
	lis r30, 0x0000
- 
 
 154 
	ori r30, r30, 0x0002
- 
 
 155
- 
 
 156 
	mtspr ibat0u, r31
- 
 
 157 
	mtspr ibat0l, r30
- 
 
 158
- 
 
 159 
	mtspr dbat0u, r31
- 
 
 160 
	mtspr dbat0l, r30
- 
 
 161
- 
 
 162 
	# FIXME: temporal framebuffer mapping
- 
 
 163
- 
 
 164 
	lis r31, 0xf000
- 
 
 165 
	ori r31, r31, 0x0ffe
- 
 
 166
- 
 
 167 
	lis r30, 0x8400
- 
 
 168 
	ori r30, r30, 0x0002
- 
 
 169
- 
 
 170 
	mtspr dbat1u, r31
- 
 
 171 
	mtspr dbat1l, r30
- 
 
 172
121 
	tlbia
 173 
	tlbia
122
174
123 
	# start the kernel
 175 
	# start the kernel
124 
	#
 176 
	#
125 
	# r3 = memmap (pa)
 177 
	# r3 = memmap (pa)