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 invalidate_tlb(u8 tlb)
47 for (i = 0; i < num_tlb_entries; i++) {
48 write_tlb(tlb_table[i].mas0,
58 #ifndef CONFIG_NAND_SPL
59 void set_tlb(u8 tlb, u32 epn, u64 rpn,
61 u8 ts, u8 esel, u8 tsize, u8 iprot)
63 u32 _mas0, _mas1, _mas2, _mas3, _mas7;
65 _mas0 = FSL_BOOKE_MAS0(tlb, esel, 0);
66 _mas1 = FSL_BOOKE_MAS1(1, iprot, 0, ts, tsize);
67 _mas2 = FSL_BOOKE_MAS2(epn, wimge);
68 _mas3 = FSL_BOOKE_MAS3(rpn, 0, perms);
69 _mas7 = FSL_BOOKE_MAS7(rpn);
71 write_tlb(_mas0, _mas1, _mas2, _mas3, _mas7);
73 #ifdef CONFIG_ADDR_MAP
74 if ((tlb == 1) && (gd->flags & GD_FLG_RELOC))
75 addrmap_set_entry(epn, rpn, (1UL << ((tsize * 2) + 10)), esel);
79 void disable_tlb(u8 esel)
81 u32 _mas0, _mas1, _mas2, _mas3, _mas7;
83 _mas0 = FSL_BOOKE_MAS0(1, esel, 0);
93 #ifdef CONFIG_ENABLE_36BIT_PHYS
96 asm volatile("isync;msync;tlbwe;isync");
98 #ifdef CONFIG_ADDR_MAP
99 if (gd->flags & GD_FLG_RELOC)
100 addrmap_set_entry(0, 0, 0, esel);
104 static void tlbsx (const volatile unsigned *addr)
106 __asm__ __volatile__ ("tlbsx 0,%0" : : "r" (addr), "m" (*addr));
109 /* return -1 if we didn't find anything */
110 int find_tlb_idx(void *addr, u8 tlbsel)
114 /* zero out Search PID, AS */
122 /* we found something, and its in the TLB we expect */
123 if ((MAS1_VALID & _mas1) &&
124 (MAS0_TLBSEL(tlbsel) == (_mas0 & MAS0_TLBSEL_MSK))) {
125 return ((_mas0 & MAS0_ESEL_MSK) >> 16);
131 #ifdef CONFIG_ADDR_MAP
132 void init_addr_map(void)
135 unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xff;
137 /* walk all the entries */
138 for (i = 0; i < max_cam; i++) {
143 mtspr(MAS0, FSL_BOOKE_MAS0(1, i, 0));
145 asm volatile("tlbre;isync");
148 /* if the entry isn't valid skip it */
149 if (!(_mas1 & MAS1_VALID))
152 tsize = (_mas1 >> 8) & 0xf;
153 epn = mfspr(MAS2) & MAS2_EPN;
154 rpn = mfspr(MAS3) & MAS3_RPN;
155 #ifdef CONFIG_ENABLE_36BIT_PHYS
156 rpn |= ((phys_addr_t)mfspr(MAS7)) << 32;
159 addrmap_set_entry(epn, rpn, (1UL << ((tsize * 2) + 10)), i);
166 #ifndef CONFIG_SYS_DDR_TLB_START
167 #define CONFIG_SYS_DDR_TLB_START 8
170 unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg)
172 unsigned int tlb_size;
173 unsigned int ram_tlb_index = CONFIG_SYS_DDR_TLB_START;
174 unsigned int ram_tlb_address = (unsigned int)CONFIG_SYS_DDR_SDRAM_BASE;
175 unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xf;
176 u64 size, memsize = (u64)memsize_in_meg << 20;
178 size = min(memsize, CONFIG_MAX_MEM_MAPPED);
180 /* Convert (4^max) kB to (2^max) bytes */
181 max_cam = max_cam * 2 + 10;
183 for (; size && ram_tlb_index < 16; ram_tlb_index++) {
184 u32 camsize = __ilog2_u64(size) & ~1U;
185 u32 align = __ilog2(ram_tlb_address) & ~1U;
187 if (align == -2) align = max_cam;
191 if (camsize > max_cam)
194 tlb_size = (camsize - 10) / 2;
196 set_tlb(1, ram_tlb_address, ram_tlb_address,
197 MAS3_SX|MAS3_SW|MAS3_SR, 0,
198 0, ram_tlb_index, tlb_size, 1);
200 size -= 1ULL << camsize;
201 memsize -= 1ULL << camsize;
202 ram_tlb_address += 1UL << camsize;
206 print_size(memsize, " left unmapped\n");
209 * Confirm that the requested amount of memory was mapped.
211 return memsize_in_meg;
213 #endif /* !CONFIG_NAND_SPL */