diff options
Diffstat (limited to 'arch/powerpc/cpu-85xx/mmu.c')
-rw-r--r-- | arch/powerpc/cpu-85xx/mmu.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/powerpc/cpu-85xx/mmu.c b/arch/powerpc/cpu-85xx/mmu.c new file mode 100644 index 0000000000..b484acbf80 --- /dev/null +++ b/arch/powerpc/cpu-85xx/mmu.c @@ -0,0 +1,61 @@ +/* + * Copyright 2014 GE Intelligent Platforms, Inc. + * + * 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/cache.h> +#include <mmu.h> +#include <mach/mmu.h> + +int arch_remap_range(void *virt_addr, phys_addr_t phys_addr, size_t size, unsigned flags) +{ + uint32_t ptr, start, tsize, valid, wimge, pte_flags; + unsigned long epn; + phys_addr_t rpn = 0; + int esel = 0; + + if (phys_addr != virt_to_phys(virt_addr)) + return -ENOSYS; + + switch (flags) { + case MAP_UNCACHED: + pte_flags = MAS2_I; + break; + case MAP_CACHED: + pte_flags = 0; + break; + default: + return -EINVAL; + } + + ptr = start = (uint32_t)virt_addr; + wimge = pte_flags | MAS2_M; + + while (ptr < (start + size)) { + esel = e500_find_tlb_idx((void *)ptr, 1); + if (esel != -1) + break; + e500_read_tlbcam_entry(esel, &valid, &tsize, &epn, + &rpn); + if (flags & MAS2_I) { + flush_dcache(); + invalidate_icache(); + } + e500_set_tlb(1, epn, rpn, MAS3_SX|MAS3_SW|MAS3_SR, + (u8)wimge, 0, esel, tsize, 1); + /* convert tsize to bytes to increment address. */ + ptr += (1ULL << ((tsize) + 10)); + } + + return 0; +} |