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* Copyright 2008-2009 Freescale Semiconductor, Inc.
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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* See file CREDITS for list of people who contributed to this
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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#include <asm/processor.h>
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#ifdef CONFIG_ADDR_MAP
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DECLARE_GLOBAL_DATA_PTR;
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void invalidate_tlb(u8 tlb)
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for (i = 0; i < num_tlb_entries; i++) {
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write_tlb(tlb_table[i].mas0,
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#ifndef CONFIG_NAND_SPL
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static inline void use_tlb_cam(u8 idx)
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gd->used_tlb_cams[i] |= (1 << bit);
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static inline void free_tlb_cam(u8 idx)
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gd->used_tlb_cams[i] &= ~(1 << bit);
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void init_used_tlb_cams(void)
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unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff;
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for (i = 0; i < ((CONFIG_SYS_NUM_TLBCAMS+31)/32); i++)
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gd->used_tlb_cams[i] = 0;
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/* walk all the entries */
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for (i = 0; i < num_cam; i++) {
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mtspr(MAS0, FSL_BOOKE_MAS0(1, i, 0));
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asm volatile("tlbre;isync");
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/* if the entry isn't valid skip it */
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if ((_mas1 & MAS1_VALID))
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int find_free_tlbcam(void)
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for (i = 0; i < ((CONFIG_SYS_NUM_TLBCAMS+31)/32); i++) {
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idx = ffz(gd->used_tlb_cams[i]);
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if (idx >= CONFIG_SYS_NUM_TLBCAMS)
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void set_tlb(u8 tlb, u32 epn, u64 rpn,
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u8 ts, u8 esel, u8 tsize, u8 iprot)
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u32 _mas0, _mas1, _mas2, _mas3, _mas7;
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_mas0 = FSL_BOOKE_MAS0(tlb, esel, 0);
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_mas1 = FSL_BOOKE_MAS1(1, iprot, 0, ts, tsize);
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_mas2 = FSL_BOOKE_MAS2(epn, wimge);
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_mas3 = FSL_BOOKE_MAS3(rpn, 0, perms);
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_mas7 = FSL_BOOKE_MAS7(rpn);
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write_tlb(_mas0, _mas1, _mas2, _mas3, _mas7);
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#ifdef CONFIG_ADDR_MAP
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if ((tlb == 1) && (gd->flags & GD_FLG_RELOC))
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addrmap_set_entry(epn, rpn, (1UL << ((tsize * 2) + 10)), esel);
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void disable_tlb(u8 esel)
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u32 _mas0, _mas1, _mas2, _mas3, _mas7;
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_mas0 = FSL_BOOKE_MAS0(1, esel, 0);
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#ifdef CONFIG_ENABLE_36BIT_PHYS
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asm volatile("isync;msync;tlbwe;isync");
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#ifdef CONFIG_ADDR_MAP
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if (gd->flags & GD_FLG_RELOC)
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addrmap_set_entry(0, 0, 0, esel);
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static void tlbsx (const volatile unsigned *addr)
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__asm__ __volatile__ ("tlbsx 0,%0" : : "r" (addr), "m" (*addr));
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/* return -1 if we didn't find anything */
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int find_tlb_idx(void *addr, u8 tlbsel)
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/* zero out Search PID, AS */
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/* we found something, and its in the TLB we expect */
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if ((MAS1_VALID & _mas1) &&
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(MAS0_TLBSEL(tlbsel) == (_mas0 & MAS0_TLBSEL_MSK))) {
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return ((_mas0 & MAS0_ESEL_MSK) >> 16);
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#ifdef CONFIG_ADDR_MAP
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void init_addr_map(void)
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unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff;
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/* walk all the entries */
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for (i = 0; i < num_cam; i++) {
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mtspr(MAS0, FSL_BOOKE_MAS0(1, i, 0));
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asm volatile("tlbre;isync");
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/* if the entry isn't valid skip it */
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if (!(_mas1 & MAS1_VALID))
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tsize = (_mas1 >> 8) & 0xf;
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epn = mfspr(MAS2) & MAS2_EPN;
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rpn = mfspr(MAS3) & MAS3_RPN;
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#ifdef CONFIG_ENABLE_36BIT_PHYS
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rpn |= ((phys_addr_t)mfspr(MAS7)) << 32;
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addrmap_set_entry(epn, rpn, (1UL << ((tsize * 2) + 10)), i);
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unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg)
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unsigned int tlb_size;
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unsigned int ram_tlb_address = (unsigned int)CONFIG_SYS_DDR_SDRAM_BASE;
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unsigned int max_cam = (mfspr(SPRN_TLB1CFG) >> 16) & 0xf;
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u64 size, memsize = (u64)memsize_in_meg << 20;
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size = min(memsize, CONFIG_MAX_MEM_MAPPED);
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/* Convert (4^max) kB to (2^max) bytes */
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max_cam = max_cam * 2 + 10;
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for (i = 0; size && i < 8; i++) {
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int ram_tlb_index = find_free_tlbcam();
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u32 camsize = __ilog2_u64(size) & ~1U;
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u32 align = __ilog2(ram_tlb_address) & ~1U;
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if (ram_tlb_index == -1)
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if (align == -2) align = max_cam;
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if (camsize > max_cam)
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tlb_size = (camsize - 10) / 2;
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set_tlb(1, ram_tlb_address, ram_tlb_address,
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MAS3_SX|MAS3_SW|MAS3_SR, 0,
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0, ram_tlb_index, tlb_size, 1);
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size -= 1ULL << camsize;
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memsize -= 1ULL << camsize;
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ram_tlb_address += 1UL << camsize;
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print_size(memsize, " left unmapped\n");
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* Confirm that the requested amount of memory was mapped.
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return memsize_in_meg;
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#endif /* !CONFIG_NAND_SPL */