2 * Blackfin CPLB initialization
4 * Copyright 2004-2007 Analog Devices Inc.
6 * Bugs: Enter bugs at http://blackfin.uclinux.org/
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, see the file COPYING, or write
20 * to the Free Software Foundation, Inc.,
21 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #include <linux/module.h>
26 #include <asm/blackfin.h>
27 #include <asm/cacheflush.h>
29 #include <asm/cplbinit.h>
30 #include <asm/mem_map.h>
32 struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
33 struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
35 int first_switched_icplb PDT_ATTR;
36 int first_switched_dcplb PDT_ATTR;
38 struct cplb_boundary dcplb_bounds[9] PDT_ATTR;
39 struct cplb_boundary icplb_bounds[7] PDT_ATTR;
41 int icplb_nr_bounds PDT_ATTR;
42 int dcplb_nr_bounds PDT_ATTR;
44 void __init generate_cplb_tables_cpu(unsigned int cpu)
49 struct cplb_entry *d_tbl = dcplb_tbl[cpu];
50 struct cplb_entry *i_tbl = icplb_tbl[cpu];
52 printk(KERN_INFO "NOMPU: setting up cplb tables\n");
56 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
57 /* Set up the zero page. */
59 d_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
61 i_tbl[i_i++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
64 /* Cover kernel memory with 4M pages. */
67 for (; addr < memory_start; addr += 4 * 1024 * 1024) {
68 d_tbl[i_d].addr = addr;
69 d_tbl[i_d++].data = SDRAM_DGENERIC | PAGE_SIZE_4MB;
70 i_tbl[i_i].addr = addr;
71 i_tbl[i_i++].data = SDRAM_IGENERIC | PAGE_SIZE_4MB;
74 /* Cover L1 memory. One 4M area for code and data each is enough. */
75 if (L1_DATA_A_LENGTH || L1_DATA_B_LENGTH) {
76 d_tbl[i_d].addr = L1_DATA_A_START;
77 d_tbl[i_d++].data = L1_DMEMORY | PAGE_SIZE_4MB;
79 i_tbl[i_i].addr = L1_CODE_START;
80 i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB;
82 first_switched_dcplb = i_d;
83 first_switched_icplb = i_i;
85 BUG_ON(first_switched_dcplb > MAX_CPLBS);
86 BUG_ON(first_switched_icplb > MAX_CPLBS);
88 while (i_d < MAX_CPLBS)
89 d_tbl[i_d++].data = 0;
90 while (i_i < MAX_CPLBS)
91 i_tbl[i_i++].data = 0;
94 void __init generate_cplb_tables_all(void)
99 /* Normal RAM, including MTD FS. */
100 #ifdef CONFIG_MTD_UCLINUX
101 dcplb_bounds[i_d].eaddr = memory_mtd_start + mtd_size;
103 dcplb_bounds[i_d].eaddr = memory_end;
105 dcplb_bounds[i_d++].data = SDRAM_DGENERIC;
106 /* DMA uncached region. */
107 if (DMA_UNCACHED_REGION) {
108 dcplb_bounds[i_d].eaddr = _ramend;
109 dcplb_bounds[i_d++].data = SDRAM_DNON_CHBL;
111 if (_ramend != physical_mem_end) {
112 /* Reserved memory. */
113 dcplb_bounds[i_d].eaddr = physical_mem_end;
114 dcplb_bounds[i_d++].data = (reserved_mem_dcache_on ?
115 SDRAM_DGENERIC : SDRAM_DNON_CHBL);
117 /* Addressing hole up to the async bank. */
118 dcplb_bounds[i_d].eaddr = ASYNC_BANK0_BASE;
119 dcplb_bounds[i_d++].data = 0;
121 dcplb_bounds[i_d].eaddr = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE;
122 dcplb_bounds[i_d++].data = SDRAM_EBIU;
123 /* Addressing hole up to BootROM. */
124 dcplb_bounds[i_d].eaddr = BOOT_ROM_START;
125 dcplb_bounds[i_d++].data = 0;
126 /* BootROM -- largest one should be less than 1 meg. */
127 dcplb_bounds[i_d].eaddr = BOOT_ROM_START + (1 * 1024 * 1024);
128 dcplb_bounds[i_d++].data = SDRAM_DGENERIC;
130 /* Addressing hole up to L2 SRAM. */
131 dcplb_bounds[i_d].eaddr = L2_START;
132 dcplb_bounds[i_d++].data = 0;
134 dcplb_bounds[i_d].eaddr = L2_START + L2_LENGTH;
135 dcplb_bounds[i_d++].data = L2_DMEMORY;
137 dcplb_nr_bounds = i_d;
138 BUG_ON(dcplb_nr_bounds > ARRAY_SIZE(dcplb_bounds));
141 /* Normal RAM, including MTD FS. */
142 #ifdef CONFIG_MTD_UCLINUX
143 icplb_bounds[i_i].eaddr = memory_mtd_start + mtd_size;
145 icplb_bounds[i_i].eaddr = memory_end;
147 icplb_bounds[i_i++].data = SDRAM_IGENERIC;
148 /* DMA uncached region. */
149 if (DMA_UNCACHED_REGION) {
150 icplb_bounds[i_i].eaddr = _ramend;
151 icplb_bounds[i_i++].data = 0;
153 if (_ramend != physical_mem_end) {
154 /* Reserved memory. */
155 icplb_bounds[i_i].eaddr = physical_mem_end;
156 icplb_bounds[i_i++].data = (reserved_mem_icache_on ?
157 SDRAM_IGENERIC : SDRAM_INON_CHBL);
159 /* Addressing hole up to BootROM. */
160 icplb_bounds[i_i].eaddr = BOOT_ROM_START;
161 icplb_bounds[i_i++].data = 0;
162 /* BootROM -- largest one should be less than 1 meg. */
163 icplb_bounds[i_i].eaddr = BOOT_ROM_START + (1 * 1024 * 1024);
164 icplb_bounds[i_i++].data = SDRAM_IGENERIC;
166 /* Addressing hole up to L2 SRAM, including the async bank. */
167 icplb_bounds[i_i].eaddr = L2_START;
168 icplb_bounds[i_i++].data = 0;
170 icplb_bounds[i_i].eaddr = L2_START + L2_LENGTH;
171 icplb_bounds[i_i++].data = L2_IMEMORY;
173 icplb_nr_bounds = i_i;
174 BUG_ON(icplb_nr_bounds > ARRAY_SIZE(icplb_bounds));