| /* |
| * Copyright 2008-2011 Freescale Semiconductor, Inc. |
| * |
| * (C) Copyright 2000 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <common.h> |
| #include <asm/processor.h> |
| #include <asm/mmu.h> |
| #ifdef CONFIG_ADDR_MAP |
| #include <addr_map.h> |
| #endif |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| void invalidate_tlb(u8 tlb) |
| { |
| if (tlb == 0) |
| mtspr(MMUCSR0, 0x4); |
| if (tlb == 1) |
| mtspr(MMUCSR0, 0x2); |
| } |
| |
| void init_tlbs(void) |
| { |
| int i; |
| |
| for (i = 0; i < num_tlb_entries; i++) { |
| write_tlb(tlb_table[i].mas0, |
| tlb_table[i].mas1, |
| tlb_table[i].mas2, |
| tlb_table[i].mas3, |
| tlb_table[i].mas7); |
| } |
| |
| return ; |
| } |
| |
| #ifndef CONFIG_NAND_SPL |
| void read_tlbcam_entry(int idx, u32 *valid, u32 *tsize, unsigned long *epn, |
| phys_addr_t *rpn) |
| { |
| u32 _mas1; |
| |
| mtspr(MAS0, FSL_BOOKE_MAS0(1, idx, 0)); |
| asm volatile("tlbre;isync"); |
| _mas1 = mfspr(MAS1); |
| |
| *valid = (_mas1 & MAS1_VALID); |
| *tsize = (_mas1 >> 8) & 0xf; |
| *epn = mfspr(MAS2) & MAS2_EPN; |
| *rpn = mfspr(MAS3) & MAS3_RPN; |
| #ifdef CONFIG_ENABLE_36BIT_PHYS |
| *rpn |= ((u64)mfspr(MAS7)) << 32; |
| #endif |
| } |
| |
| void print_tlbcam(void) |
| { |
| int i; |
| unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff; |
| |
| /* walk all the entries */ |
| printf("TLBCAM entries\n"); |
| for (i = 0; i < num_cam; i++) { |
| unsigned long epn; |
| u32 tsize, valid; |
| phys_addr_t rpn; |
| |
| read_tlbcam_entry(i, &valid, &tsize, &epn, &rpn); |
| printf("entry %02d: V: %d EPN 0x%08x RPN 0x%08llx size:", |
| i, (valid == 0) ? 0 : 1, (unsigned int)epn, |
| (unsigned long long)rpn); |
| print_size(TSIZE_TO_BYTES(tsize), "\n"); |
| } |
| } |
| |
| static inline void use_tlb_cam(u8 idx) |
| { |
| int i = idx / 32; |
| int bit = idx % 32; |
| |
| gd->used_tlb_cams[i] |= (1 << bit); |
| } |
| |
| static inline void free_tlb_cam(u8 idx) |
| { |
| int i = idx / 32; |
| int bit = idx % 32; |
| |
| gd->used_tlb_cams[i] &= ~(1 << bit); |
| } |
| |
| void init_used_tlb_cams(void) |
| { |
| int i; |
| unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff; |
| |
| for (i = 0; i < ((CONFIG_SYS_NUM_TLBCAMS+31)/32); i++) |
| gd->used_tlb_cams[i] = 0; |
| |
| /* walk all the entries */ |
| for (i = 0; i < num_cam; i++) { |
| mtspr(MAS0, FSL_BOOKE_MAS0(1, i, 0)); |
| asm volatile("tlbre;isync"); |
| if (mfspr(MAS1) & MAS1_VALID) |
| use_tlb_cam(i); |
| } |
| } |
| |
| int find_free_tlbcam(void) |
| { |
| int i; |
| u32 idx; |
| |
| for (i = 0; i < ((CONFIG_SYS_NUM_TLBCAMS+31)/32); i++) { |
| idx = ffz(gd->used_tlb_cams[i]); |
| |
| if (idx != 32) |
| break; |
| } |
| |
| idx += i * 32; |
| |
| if (idx >= CONFIG_SYS_NUM_TLBCAMS) |
| return -1; |
| |
| return idx; |
| } |
| |
| void set_tlb(u8 tlb, u32 epn, u64 rpn, |
| u8 perms, u8 wimge, |
| u8 ts, u8 esel, u8 tsize, u8 iprot) |
| { |
| u32 _mas0, _mas1, _mas2, _mas3, _mas7; |
| |
| if (tlb == 1) |
| use_tlb_cam(esel); |
| |
| _mas0 = FSL_BOOKE_MAS0(tlb, esel, 0); |
| _mas1 = FSL_BOOKE_MAS1(1, iprot, 0, ts, tsize); |
| _mas2 = FSL_BOOKE_MAS2(epn, wimge); |
| _mas3 = FSL_BOOKE_MAS3(rpn, 0, perms); |
| _mas7 = FSL_BOOKE_MAS7(rpn); |
| |
| write_tlb(_mas0, _mas1, _mas2, _mas3, _mas7); |
| |
| #ifdef CONFIG_ADDR_MAP |
| if ((tlb == 1) && (gd->flags & GD_FLG_RELOC)) |
| addrmap_set_entry(epn, rpn, TSIZE_TO_BYTES(tsize), esel); |
| #endif |
| } |
| |
| void disable_tlb(u8 esel) |
| { |
| u32 _mas0, _mas1, _mas2, _mas3, _mas7; |
| |
| free_tlb_cam(esel); |
| |
| _mas0 = FSL_BOOKE_MAS0(1, esel, 0); |
| _mas1 = 0; |
| _mas2 = 0; |
| _mas3 = 0; |
| _mas7 = 0; |
| |
| mtspr(MAS0, _mas0); |
| mtspr(MAS1, _mas1); |
| mtspr(MAS2, _mas2); |
| mtspr(MAS3, _mas3); |
| #ifdef CONFIG_ENABLE_36BIT_PHYS |
| mtspr(MAS7, _mas7); |
| #endif |
| asm volatile("isync;msync;tlbwe;isync"); |
| |
| #ifdef CONFIG_ADDR_MAP |
| if (gd->flags & GD_FLG_RELOC) |
| addrmap_set_entry(0, 0, 0, esel); |
| #endif |
| } |
| |
| static void tlbsx (const volatile unsigned *addr) |
| { |
| __asm__ __volatile__ ("tlbsx 0,%0" : : "r" (addr), "m" (*addr)); |
| } |
| |
| /* return -1 if we didn't find anything */ |
| int find_tlb_idx(void *addr, u8 tlbsel) |
| { |
| u32 _mas0, _mas1; |
| |
| /* zero out Search PID, AS */ |
| mtspr(MAS6, 0); |
| |
| tlbsx(addr); |
| |
| _mas0 = mfspr(MAS0); |
| _mas1 = mfspr(MAS1); |
| |
| /* we found something, and its in the TLB we expect */ |
| if ((MAS1_VALID & _mas1) && |
| (MAS0_TLBSEL(tlbsel) == (_mas0 & MAS0_TLBSEL_MSK))) { |
| return ((_mas0 & MAS0_ESEL_MSK) >> 16); |
| } |
| |
| return -1; |
| } |
| |
| #ifdef CONFIG_ADDR_MAP |
| void init_addr_map(void) |
| { |
| int i; |
| unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff; |
| |
| /* walk all the entries */ |
| for (i = 0; i < num_cam; i++) { |
| unsigned long epn; |
| u32 tsize, valid; |
| phys_addr_t rpn; |
| |
| read_tlbcam_entry(i, &valid, &tsize, &epn, &rpn); |
| if (valid & MAS1_VALID) |
| addrmap_set_entry(epn, rpn, TSIZE_TO_BYTES(tsize), i); |
| } |
| |
| return ; |
| } |
| #endif |
| |
| unsigned int |
| setup_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg) |
| { |
| int i; |
| unsigned int tlb_size; |
| unsigned int wimge = 0; |
| unsigned int ram_tlb_address = (unsigned int)CONFIG_SYS_DDR_SDRAM_BASE; |
| unsigned int max_cam; |
| u64 size, memsize = (u64)memsize_in_meg << 20; |
| |
| #ifdef CONFIG_SYS_PPC_DDR_WIMGE |
| wimge = CONFIG_SYS_PPC_DDR_WIMGE; |
| #endif |
| size = min(memsize, CONFIG_MAX_MEM_MAPPED); |
| if ((mfspr(SPRN_MMUCFG) & MMUCFG_MAVN) == MMUCFG_MAVN_V1) { |
| /* Convert (4^max) kB to (2^max) bytes */ |
| max_cam = ((mfspr(SPRN_TLB1CFG) >> 16) & 0xf) * 2 + 10; |
| } else { |
| /* Convert (2^max) kB to (2^max) bytes */ |
| max_cam = __ilog2(mfspr(SPRN_TLB1PS)) + 10; |
| } |
| |
| for (i = 0; size && i < 8; i++) { |
| int ram_tlb_index = find_free_tlbcam(); |
| u32 camsize = __ilog2_u64(size) & ~1U; |
| u32 align = __ilog2(ram_tlb_address) & ~1U; |
| |
| if (ram_tlb_index == -1) |
| break; |
| |
| if (align == -2) align = max_cam; |
| if (camsize > align) |
| camsize = align; |
| |
| if (camsize > max_cam) |
| camsize = max_cam; |
| |
| tlb_size = (camsize - 10) / 2; |
| |
| set_tlb(1, ram_tlb_address, p_addr, |
| MAS3_SX|MAS3_SW|MAS3_SR, wimge, |
| 0, ram_tlb_index, tlb_size, 1); |
| |
| size -= 1ULL << camsize; |
| memsize -= 1ULL << camsize; |
| ram_tlb_address += 1UL << camsize; |
| p_addr += 1UL << camsize; |
| } |
| |
| if (memsize) |
| print_size(memsize, " left unmapped\n"); |
| return memsize_in_meg; |
| } |
| |
| unsigned int setup_ddr_tlbs(unsigned int memsize_in_meg) |
| { |
| return |
| setup_ddr_tlbs_phys(CONFIG_SYS_DDR_SDRAM_BASE, memsize_in_meg); |
| } |
| |
| /* Invalidate the DDR TLBs for the requested size */ |
| void clear_ddr_tlbs_phys(phys_addr_t p_addr, unsigned int memsize_in_meg) |
| { |
| u32 vstart = CONFIG_SYS_DDR_SDRAM_BASE; |
| unsigned long epn; |
| u32 tsize, valid, ptr; |
| phys_addr_t rpn = 0; |
| int ddr_esel; |
| u64 memsize = (u64)memsize_in_meg << 20; |
| |
| ptr = vstart; |
| |
| while (ptr < (vstart + memsize)) { |
| ddr_esel = find_tlb_idx((void *)ptr, 1); |
| if (ddr_esel != -1) { |
| read_tlbcam_entry(ddr_esel, &valid, &tsize, &epn, &rpn); |
| disable_tlb(ddr_esel); |
| } |
| ptr += TSIZE_TO_BYTES(tsize); |
| } |
| } |
| |
| void clear_ddr_tlbs(unsigned int memsize_in_meg) |
| { |
| clear_ddr_tlbs_phys(CONFIG_SYS_DDR_SDRAM_BASE, memsize_in_meg); |
| } |
| |
| |
| #endif /* !CONFIG_NAND_SPL */ |