2 * Copyright 2008-2009 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>
29 #ifdef CONFIG_ADDR_MAP
33 DECLARE_GLOBAL_DATA_PTR;
35 void set_tlb(u8 tlb, u32 epn, u64 rpn,
37 u8 ts, u8 esel, u8 tsize, u8 iprot)
39 u32 _mas0, _mas1, _mas2, _mas3, _mas7;
41 _mas0 = FSL_BOOKE_MAS0(tlb, esel, 0);
42 _mas1 = FSL_BOOKE_MAS1(1, iprot, 0, ts, tsize);
43 _mas2 = FSL_BOOKE_MAS2(epn, wimge);
44 _mas3 = FSL_BOOKE_MAS3(rpn, 0, perms);
45 _mas7 = FSL_BOOKE_MAS7(rpn);
47 write_tlb(_mas0, _mas1, _mas2, _mas3, _mas7);
49 #ifdef CONFIG_ADDR_MAP
50 if ((tlb == 1) && (gd->flags & GD_FLG_RELOC))
51 addrmap_set_entry(epn, rpn, (1UL << ((tsize * 2) + 10)), esel);
55 void disable_tlb(u8 esel)
57 u32 _mas0, _mas1, _mas2, _mas3, _mas7;
59 _mas0 = FSL_BOOKE_MAS0(1, esel, 0);
69 #ifdef CONFIG_ENABLE_36BIT_PHYS
72 asm volatile("isync;msync;tlbwe;isync");
74 #ifdef CONFIG_ADDR_MAP
75 if (gd->flags & GD_FLG_RELOC)
76 addrmap_set_entry(0, 0, 0, esel);
80 void invalidate_tlb(u8 tlb)
92 for (i = 0; i < num_tlb_entries; i++) {
93 set_tlb(tlb_table[i].tlb, tlb_table[i].epn, tlb_table[i].rpn,
94 tlb_table[i].perms, tlb_table[i].wimge,
95 tlb_table[i].ts, tlb_table[i].esel, tlb_table[i].tsize,
102 static void tlbsx (const volatile unsigned *addr)
104 __asm__ __volatile__ ("tlbsx 0,%0" : : "r" (addr), "m" (*addr));
107 /* return -1 if we didn't find anything */
108 int find_tlb_idx(void *addr, u8 tlbsel)
112 /* zero out Search PID, AS */
120 /* we found something, and its in the TLB we expect */
121 if ((MAS1_VALID & _mas1) &&
122 (MAS0_TLBSEL(tlbsel) == (_mas0 & MAS0_TLBSEL_MSK))) {
123 return ((_mas0 & MAS0_ESEL_MSK) >> 16);
129 #ifdef CONFIG_ADDR_MAP
130 void init_addr_map(void)
133 unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xff;
135 /* walk all the entries */
136 for (i = 0; i < max_cam; i++) {
141 mtspr(MAS0, FSL_BOOKE_MAS0(1, i, 0));
143 asm volatile("tlbre;isync");
146 /* if the entry isn't valid skip it */
147 if (!(_mas1 & MAS1_VALID))
150 tsize = (_mas1 >> 8) & 0xf;
151 epn = mfspr(MAS2) & MAS2_EPN;
152 rpn = mfspr(MAS3) & MAS3_RPN;
153 #ifdef CONFIG_ENABLE_36BIT_PHYS
154 rpn |= ((phys_addr_t)mfspr(MAS7)) << 32;
157 addrmap_set_entry(epn, rpn, (1UL << ((tsize * 2) + 10)), i);
164 #ifndef CONFIG_SYS_DDR_TLB_START
165 #define CONFIG_SYS_DDR_TLB_START 8
168 unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg)
170 unsigned int tlb_size;
171 unsigned int ram_tlb_index = CONFIG_SYS_DDR_TLB_START;
172 unsigned int ram_tlb_address = (unsigned int)CONFIG_SYS_DDR_SDRAM_BASE;
173 unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xf;
174 u64 size, memsize = (u64)memsize_in_meg << 20;
176 size = min(memsize, CONFIG_MAX_MEM_MAPPED);
178 /* Convert (4^max) kB to (2^max) bytes */
179 max_cam = max_cam * 2 + 10;
181 for (; size && ram_tlb_index < 16; ram_tlb_index++) {
182 u32 camsize = __ilog2_u64(size) & ~1U;
183 u32 align = __ilog2(ram_tlb_address) & ~1U;
185 if (align == -2) align = max_cam;
189 if (camsize > max_cam)
192 tlb_size = (camsize - 10) / 2;
194 set_tlb(1, ram_tlb_address, ram_tlb_address,
195 MAS3_SX|MAS3_SW|MAS3_SR, 0,
196 0, ram_tlb_index, tlb_size, 1);
198 size -= 1ULL << camsize;
199 memsize -= 1ULL << camsize;
200 ram_tlb_address += 1UL << camsize;
204 print_size(memsize, " left unmapped\n");
207 * Confirm that the requested amount of memory was mapped.
209 return memsize_in_meg;