diff options
Diffstat (limited to 'cpu/mpc85xx/tlb.c')
| -rw-r--r-- | cpu/mpc85xx/tlb.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/cpu/mpc85xx/tlb.c b/cpu/mpc85xx/tlb.c new file mode 100644 index 0000000..b319ad4 --- /dev/null +++ b/cpu/mpc85xx/tlb.c @@ -0,0 +1,95 @@ +/* + * Copyright 2008 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> + +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; + + _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 = rpn >> 32; + + 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"); +} + +void disable_tlb(u8 esel) +{ + u32 _mas0, _mas1, _mas2, _mas3, _mas7; + + _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"); +} + +void invalidate_tlb(u8 tlb) +{ + if (tlb == 0) + mtspr(MMUCSR0, 0x4); + if (tlb == 1) + mtspr(MMUCSR0, 0x2); +} + +void init_tlbs(void) +{ +#ifdef CONFIG_FSL_INIT_TLBS + int i; + + for (i = 0; i < num_tlb_entries; i++) { + set_tlb(tlb_table[i].tlb, tlb_table[i].epn, tlb_table[i].rpn, + tlb_table[i].perms, tlb_table[i].wimge, + tlb_table[i].ts, tlb_table[i].esel, tlb_table[i].tsize, + tlb_table[i].iprot); + } +#endif + + return ; +} + |