arch/blackfin/kernel/cplb-nompu/cplbinit.c

   1 /*
   2  * Blackfin CPLB initialization
   3  *
   4  *               Copyright 2004-2007 Analog Devices Inc.
   5  *
   6  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
   7  *
   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.
  12  *
  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.
  17  *
  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
  22  */
  23
  24 #include <linux/module.h>
  25
  26 #include <asm/blackfin.h>
  27 #include <asm/cacheflush.h>
  28 #include <asm/cplb.h>
  29 #include <asm/cplbinit.h>
  30 #include <asm/mem_map.h>
  31
  32 struct cplb_entry icplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
  33 struct cplb_entry dcplb_tbl[NR_CPUS][MAX_CPLBS] PDT_ATTR;
  34
  35 int first_switched_icplb PDT_ATTR;
  36 int first_switched_dcplb PDT_ATTR;
  37
  38 struct cplb_boundary dcplb_bounds[9] PDT_ATTR;
  39 struct cplb_boundary icplb_bounds[7] PDT_ATTR;
  40
  41 int icplb_nr_bounds PDT_ATTR;
  42 int dcplb_nr_bounds PDT_ATTR;
  43
  44 void __init generate_cplb_tables_cpu(unsigned int cpu)
  45 {
  46         int i_d, i_i;
  47         unsigned long addr;
  48
  49         struct cplb_entry *d_tbl = dcplb_tbl[cpu];
  50         struct cplb_entry *i_tbl = icplb_tbl[cpu];
  51
  52         printk(KERN_INFO "NOMPU: setting up cplb tables\n");
  53
  54         i_d = i_i = 0;
  55
  56 #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO
  57         /* Set up the zero page.  */
  58         d_tbl[i_d].addr = 0;
  59         d_tbl[i_d++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
  60         i_tbl[i_i].addr = 0;
  61         i_tbl[i_i++].data = SDRAM_OOPS | PAGE_SIZE_1KB;
  62 #endif
  63
  64         /* Cover kernel memory with 4M pages.  */
  65         addr = 0;
  66
  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;
  72         }
  73
  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;
  78         }
  79         i_tbl[i_i].addr = L1_CODE_START;
  80         i_tbl[i_i++].data = L1_IMEMORY | PAGE_SIZE_4MB;
  81
  82         first_switched_dcplb = i_d;
  83         first_switched_icplb = i_i;
  84
  85         BUG_ON(first_switched_dcplb > MAX_CPLBS);
  86         BUG_ON(first_switched_icplb > MAX_CPLBS);
  87
  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;
  92 }
  93
  94 void __init generate_cplb_tables_all(void)
  95 {
  96         int i_d, i_i;
  97
  98         i_d = 0;
  99         /* Normal RAM, including MTD FS.  */
 100 #ifdef CONFIG_MTD_UCLINUX
 101         dcplb_bounds[i_d].eaddr = memory_mtd_start + mtd_size;
 102 #else
 103         dcplb_bounds[i_d].eaddr = memory_end;
 104 #endif
 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;
 110         }
 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);
 116         }
 117         /* Addressing hole up to the async bank.  */
 118         dcplb_bounds[i_d].eaddr = ASYNC_BANK0_BASE;
 119         dcplb_bounds[i_d++].data = 0;
 120         /* ASYNC banks.  */
 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;
 129         if (L2_LENGTH) {
 130                 /* Addressing hole up to L2 SRAM.  */
 131                 dcplb_bounds[i_d].eaddr = L2_START;
 132                 dcplb_bounds[i_d++].data = 0;
 133                 /* L2 SRAM.  */
 134                 dcplb_bounds[i_d].eaddr = L2_START + L2_LENGTH;
 135                 dcplb_bounds[i_d++].data = L2_DMEMORY;
 136         }
 137         dcplb_nr_bounds = i_d;
 138         BUG_ON(dcplb_nr_bounds > ARRAY_SIZE(dcplb_bounds));
 139
 140         i_i = 0;
 141         /* Normal RAM, including MTD FS.  */
 142 #ifdef CONFIG_MTD_UCLINUX
 143         icplb_bounds[i_i].eaddr = memory_mtd_start + mtd_size;
 144 #else
 145         icplb_bounds[i_i].eaddr = memory_end;
 146 #endif
 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;
 152         }
 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);
 158         }
 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;
 165         if (L2_LENGTH) {
 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;
 169                 /* L2 SRAM.  */
 170                 icplb_bounds[i_i].eaddr = L2_START + L2_LENGTH;
 171                 icplb_bounds[i_i++].data = L2_IMEMORY;
 172         }
 173         icplb_nr_bounds = i_i;
 174         BUG_ON(icplb_nr_bounds > ARRAY_SIZE(icplb_bounds));
 175 }