2 * Copyright 2008 Freescale Semiconductor, Inc.
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <asm/processor.h>
30 void set_tlb(u8 tlb, u32 epn, u64 rpn,
32 u8 ts, u8 esel, u8 tsize, u8 iprot)
34 u32 _mas0, _mas1, _mas2, _mas3, _mas7;
36 _mas0 = FSL_BOOKE_MAS0(tlb, esel, 0);
37 _mas1 = FSL_BOOKE_MAS1(1, iprot, 0, ts, tsize);
38 _mas2 = FSL_BOOKE_MAS2(epn, wimge);
39 _mas3 = FSL_BOOKE_MAS3(rpn, 0, perms);
46 #ifdef CONFIG_ENABLE_36BIT_PHYS
49 asm volatile("isync;msync;tlbwe;isync");
52 void disable_tlb(u8 esel)
54 u32 _mas0, _mas1, _mas2, _mas3, _mas7;
56 _mas0 = FSL_BOOKE_MAS0(1, esel, 0);
66 #ifdef CONFIG_ENABLE_36BIT_PHYS
69 asm volatile("isync;msync;tlbwe;isync");
72 void invalidate_tlb(u8 tlb)
84 for (i = 0; i < num_tlb_entries; i++) {
85 set_tlb(tlb_table[i].tlb, tlb_table[i].epn, tlb_table[i].rpn,
86 tlb_table[i].perms, tlb_table[i].wimge,
87 tlb_table[i].ts, tlb_table[i].esel, tlb_table[i].tsize,
94 unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg)
96 unsigned int tlb_size;
97 unsigned int ram_tlb_index;
98 unsigned int ram_tlb_address;
101 * Determine size of each TLB1 entry.
103 switch (memsize_in_meg) {
106 tlb_size = BOOKE_PAGESZ_16M;
110 tlb_size = BOOKE_PAGESZ_64M;
114 tlb_size = BOOKE_PAGESZ_256M;
118 if (PVR_VER(get_pvr()) > PVR_VER(PVR_85xx))
119 tlb_size = BOOKE_PAGESZ_1G;
121 tlb_size = BOOKE_PAGESZ_256M;
124 puts("DDR: only 16M, 32M, 64M, 128M, 256M, 512M, 1G"
125 " and 2G are supported.\n");
128 * The memory was not able to be mapped.
129 * Default to a small size.
131 tlb_size = BOOKE_PAGESZ_64M;
137 * Configure DDR TLB1 entries.
138 * Starting at TLB1 8, use no more than 8 TLB1 entries.
141 ram_tlb_address = (unsigned int)CFG_DDR_SDRAM_BASE;
142 while (ram_tlb_address < (memsize_in_meg * 1024 * 1024)
143 && ram_tlb_index < 16) {
144 set_tlb(1, ram_tlb_address, ram_tlb_address,
145 MAS3_SX|MAS3_SW|MAS3_SR, 0,
146 0, ram_tlb_index, tlb_size, 1);
148 ram_tlb_address += (0x1000 << ((tlb_size - 1) * 2));
153 * Confirm that the requested amount of memory was mapped.
155 return memsize_in_meg;