diff options
Diffstat (limited to 'arch/ppc/cpu-85xx/tlb.c')
| -rw-r--r-- | arch/ppc/cpu-85xx/tlb.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/arch/ppc/cpu-85xx/tlb.c b/arch/ppc/cpu-85xx/tlb.c deleted file mode 100644 index 3a5b413627..0000000000 --- a/arch/ppc/cpu-85xx/tlb.c +++ /dev/null @@ -1,194 +0,0 @@ -/* - * Copyright 2012 GE Intelligent Platforms, Inc. - * - * Copyright 2008-2009 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. - * - */ - -#include <common.h> -#include <asm/processor.h> -#include <asm/config.h> -#include <linux/log2.h> -#include <mach/mmu.h> - -void e500_invalidate_tlb(u8 tlb) -{ - if (tlb == 0) - mtspr(MMUCSR0, 0x4); - if (tlb == 1) - mtspr(MMUCSR0, 0x2); -} - -void e500_init_tlbs(void) -{ - int i; - - for (i = 0; i < num_tlb_entries; i++) { - e500_write_tlb(tlb_table[i].mas0, - tlb_table[i].mas1, - tlb_table[i].mas2, - tlb_table[i].mas3, - tlb_table[i].mas7); - } - - return ; -} - -void e500_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 >> 7) & 0x1f; - *epn = mfspr(MAS2) & MAS2_EPN; - *rpn = mfspr(MAS3) & MAS3_RPN; -} - -int e500_find_free_tlbcam(void) -{ - int ix; - u32 _mas1; - unsigned int num_cam = mfspr(SPRN_TLB1CFG) & 0xfff; - - for (ix = 0; ix < num_cam; ix++) { - mtspr(MAS0, FSL_BOOKE_MAS0(1, ix, 0)); - asm volatile("tlbre;isync"); - _mas1 = mfspr(MAS1); - if (!(_mas1 & MAS1_VALID)) - return ix; - } - - if (ix >= NUM_TLBCAMS) - panic("No more free TLBs"); - - return ix; -} - -void e500_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; - - _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); - - e500_write_tlb(_mas0, _mas1, _mas2, _mas3, _mas7); -} - -void e500_disable_tlb(u8 esel) -{ - mtspr(MAS0, FSL_BOOKE_MAS0(1, esel, 0)); - mtspr(MAS1, 0); - mtspr(MAS2, 0); - mtspr(MAS3, 0); - asm volatile("isync;msync;tlbwe;isync"); -} - -static inline void tlbsx(const unsigned *addr) -{ - __asm__ __volatile__ ("tlbsx 0,%0" : : "r" (addr), "m" (*addr)); -} - -int e500_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; - } - - panic("Address 0x%p not found in TLB %d\n", addr, tlbsel); -} - -static unsigned int e500_setup_ddr_tlbs_phys(phys_addr_t p_addr, - unsigned int memsize_in_meg) -{ - int i; - unsigned int tlb_size, max_cam, tsize_mask; - unsigned int wimge = MAS2_M; - unsigned int ram_tlb_address = (unsigned int)CFG_SDRAM_BASE; - u64 size, memsize = (u64)memsize_in_meg << 20; - - size = min(memsize, 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; - tsize_mask = ~1U; - } else { - /* Convert (2^max) kB to (2^max) bytes */ - max_cam = __ilog2(mfspr(SPRN_TLB1PS)) + 10; - tsize_mask = ~0U; - } - - for (i = 0; size && i < 8; i++) { - int ram_tlb_index = e500_find_free_tlbcam(); - u32 camsize = __ilog2_u64(size) & tsize_mask; - u32 align = __ilog2(ram_tlb_address) & tsize_mask; - - 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; - - e500_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) - printf("%lld left unmapped\n", memsize); - - return memsize_in_meg; -} - -inline unsigned int e500_setup_ddr_tlbs(unsigned int memsize_in_meg) -{ - return e500_setup_ddr_tlbs_phys(CFG_SDRAM_BASE, memsize_in_meg); -} |