blob: 3e366dc2d6e11593fc9a0b986ae3550cf162ec91 (
plain)
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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*
* Blackfin CPLB initialization
*
* Copyright 2007-2009 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <linux/module.h>
#include <asm/blackfin.h>
#include <asm/cacheflush.h>
#include <asm/cplb.h>
#include <asm/cplbinit.h>
#include <asm/mem_map.h>
struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
int first_switched_icplb PDT_ATTR;
int first_switched_dcplb PDT_ATTR;
struct cplb_boundary dcplb_bounds[9] PDT_ATTR;
struct cplb_boundary icplb_bounds[9] PDT_ATTR;
int icplb_nr_bounds PDT_ATTR;
int dcplb_nr_bounds PDT_ATTR;
void __init generate_cplb_tables_cpu(unsigned int cpu)
{
int i_d, i_i;
unsigned long addr;
struct cplb_entry *d_tbl = dcplb_tbl[cpu];
struct cplb_entry *i_tbl = icplb_tbl[cpu];
printk(KERN_INFO "NOMPU: setting up cplb tables\n");
i_d = i_i = 0;
#ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
/* Set up the zero page. */
d_tbl[i_d].addr = 0;
d_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
i_tbl[i_i].addr = 0;
i_tbl[i_i++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
#endif
/* Cover kernel memory with 4M pages. */
addr = 0;
for (; addr < memory_start; addr += 4 * 1024 * 1024) {
d_tbl[i_d].addr = addr;
d_tbl[i_d++].data = SDRAM_DGENERIC | PAGE_SIZE_4MB;
i_tbl[i_i].addr = addr;
i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_4MB;
}
#ifdef CONFIG_ROMKERNEL
/* Cover kernel XIP flash area */
addr = CONFIG_ROM_BASE & ~(4 * 1024 * 1024 - 1);
d_tbl[i_d].addr = addr;
d_tbl[i_d++].data = SDRAM_DGENERIC | PAGE_SIZE_4MB;
i_tbl[i_i].addr = addr;
i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_4MB;
#endif
/* Cover L1 memory. One 4M area for code and data each is enough. */
if (cpu == 0) {
if (L1_DATA_A_LENGTH || L1_DATA_B_LENGTH) {
d_tbl[i_d].addr = L1_DATA_A_START;
d_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB;
}
i_tbl[i_i].addr = L1_CODE_START;
i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB;
}
#ifdef CONFIG_SMP
else {
if (L1_DATA_A_LENGTH || L1_DATA_B_LENGTH) {
d_tbl[i_d].addr = COREB_L1_DATA_A_START;
d_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB;
}
i_tbl[i_i].addr = COREB_L1_CODE_START;
i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB;
}
#endif
first_switched_dcplb = i_d;
first_switched_icplb = i_i;
BUG_ON(first_switched_dcplb > MAX_CPLBS);
BUG_ON(first_switched_icplb > MAX_CPLBS);
while (i_d < MAX_CPLBS)
d_tbl[i_d++].data = 0;
while (i_i < MAX_CPLBS)
i_tbl[i_i++].data = 0;
}
void __init generate_cplb_tables_all(void)
{
unsigned long uncached_end;
int i_d, i_i;
i_d = 0;
/* Normal RAM, including MTD FS. */
#ifdef CONFIG_MTD_UCLINUX
uncached_end = memory_mtd_start + mtd_size;
#else
uncached_end = memory_end;
#endif
/*
* if DMA uncached is less than 1MB, mark the 1MB chunk as uncached
* so that we don't have to use 4kB pages and cause CPLB thrashing
*/
if ((DMA_UNCACHED_REGION >= 1 * 1024 * 1024) || !DMA_UNCACHED_REGION ||
((_ramend - uncached_end) >= 1 * 1024 * 1024))
dcplb_bounds[i_d].eaddr = uncached_end;
else
dcplb_bounds[i_d].eaddr = uncached_end & ~(1 * 1024 * 1024 - 1);
dcplb_bounds[i_d++].data = SDRAM_DGENERIC;
/* DMA uncached region. */
if (DMA_UNCACHED_REGION) {
dcplb_bounds[i_d].eaddr = _ramend;
dcplb_bounds[i_d++].data = SDRAM_DNON_CHBL;
}
if (_ramend != physical_mem_end) {
/* Reserved memory. */
dcplb_bounds[i_d].eaddr = physical_mem_end;
dcplb_bounds[i_d++].data = (reserved_mem_dcache_on ?
SDRAM_DGENERIC : SDRAM_DNON_CHBL);
}
/* Addressing hole up to the async bank. */
dcplb_bounds[i_d].eaddr = ASYNC_BANK0_BASE;
dcplb_bounds[i_d++].data = 0;
/* ASYNC banks. */
dcplb_bounds[i_d].eaddr = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE;
dcplb_bounds[i_d++].data = SDRAM_EBIU;
/* Addressing hole up to BootROM. */
dcplb_bounds[i_d].eaddr = BOOT_ROM_START;
dcplb_bounds[i_d++].data = 0;
/* BootROM -- largest one should be less than 1 meg. */
dcplb_bounds[i_d].eaddr = BOOT_ROM_START + BOOT_ROM_LENGTH;
dcplb_bounds[i_d++].data = SDRAM_DGENERIC;
if (L2_LENGTH) {
/* Addressing hole up to L2 SRAM. */
dcplb_bounds[i_d].eaddr = L2_START;
dcplb_bounds[i_d++].data = 0;
/* L2 SRAM. */
dcplb_bounds[i_d].eaddr = L2_START + L2_LENGTH;
dcplb_bounds[i_d++].data = L2_DMEMORY;
}
dcplb_nr_bounds = i_d;
BUG_ON(dcplb_nr_bounds > ARRAY_SIZE(dcplb_bounds));
i_i = 0;
/* Normal RAM, including MTD FS. */
icplb_bounds[i_i].eaddr = uncached_end;
icplb_bounds[i_i++].data = SDRAM_IGENERIC;
if (_ramend != physical_mem_end) {
/* DMA uncached region. */
if (DMA_UNCACHED_REGION) {
/* Normally this hole is caught by the async below. */
icplb_bounds[i_i].eaddr = _ramend;
icplb_bounds[i_i++].data = 0;
}
/* Reserved memory. */
icplb_bounds[i_i].eaddr = physical_mem_end;
icplb_bounds[i_i++].data = (reserved_mem_icache_on ?
SDRAM_IGENERIC : SDRAM_INON_CHBL);
}
/* Addressing hole up to the async bank. */
icplb_bounds[i_i].eaddr = ASYNC_BANK0_BASE;
icplb_bounds[i_i++].data = 0;
/* ASYNC banks. */
icplb_bounds[i_i].eaddr = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE;
icplb_bounds[i_i++].data = SDRAM_EBIU;
/* Addressing hole up to BootROM. */
icplb_bounds[i_i].eaddr = BOOT_ROM_START;
icplb_bounds[i_i++].data = 0;
/* BootROM -- largest one should be less than 1 meg. */
icplb_bounds[i_i].eaddr = BOOT_ROM_START + BOOT_ROM_LENGTH;
icplb_bounds[i_i++].data = SDRAM_IGENERIC;
if (L2_LENGTH) {
/* Addressing hole up to L2 SRAM. */
icplb_bounds[i_i].eaddr = L2_START;
icplb_bounds[i_i++].data = 0;
/* L2 SRAM. */
icplb_bounds[i_i].eaddr = L2_START + L2_LENGTH;
icplb_bounds[i_i++].data = L2_IMEMORY;
}
icplb_nr_bounds = i_i;
BUG_ON(icplb_nr_bounds > ARRAY_SIZE(icplb_bounds));
}
|
