diff options
Diffstat (limited to 'arch/powerpc/mm/tlb_nohash.c')
| -rw-r--r-- | arch/powerpc/mm/tlb_nohash.c | 72 |
1 files changed, 69 insertions, 3 deletions
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c index fe391e942521..36c0c449a899 100644 --- a/arch/powerpc/mm/tlb_nohash.c +++ b/arch/powerpc/mm/tlb_nohash.c @@ -349,11 +349,47 @@ void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address) static void setup_page_sizes(void) { - unsigned int tlb0cfg = mfspr(SPRN_TLB0CFG); - unsigned int tlb0ps = mfspr(SPRN_TLB0PS); - unsigned int eptcfg = mfspr(SPRN_EPTCFG); + unsigned int tlb0cfg; + unsigned int tlb0ps; + unsigned int eptcfg; int i, psize; +#ifdef CONFIG_PPC_FSL_BOOK3E + unsigned int mmucfg = mfspr(SPRN_MMUCFG); + + if (((mmucfg & MMUCFG_MAVN) == MMUCFG_MAVN_V1) && + (mmu_has_feature(MMU_FTR_TYPE_FSL_E))) { + unsigned int tlb1cfg = mfspr(SPRN_TLB1CFG); + unsigned int min_pg, max_pg; + + min_pg = (tlb1cfg & TLBnCFG_MINSIZE) >> TLBnCFG_MINSIZE_SHIFT; + max_pg = (tlb1cfg & TLBnCFG_MAXSIZE) >> TLBnCFG_MAXSIZE_SHIFT; + + for (psize = 0; psize < MMU_PAGE_COUNT; ++psize) { + struct mmu_psize_def *def; + unsigned int shift; + + def = &mmu_psize_defs[psize]; + shift = def->shift; + + if (shift == 0) + continue; + + /* adjust to be in terms of 4^shift Kb */ + shift = (shift - 10) >> 1; + + if ((shift >= min_pg) && (shift <= max_pg)) + def->flags |= MMU_PAGE_SIZE_DIRECT; + } + + goto no_indirect; + } +#endif + + tlb0cfg = mfspr(SPRN_TLB0CFG); + tlb0ps = mfspr(SPRN_TLB0PS); + eptcfg = mfspr(SPRN_EPTCFG); + /* Look for supported direct sizes */ for (psize = 0; psize < MMU_PAGE_COUNT; ++psize) { struct mmu_psize_def *def = &mmu_psize_defs[psize]; @@ -505,10 +541,26 @@ static void __early_init_mmu(int boot_cpu) */ linear_map_top = memblock_end_of_DRAM(); +#ifdef CONFIG_PPC_FSL_BOOK3E + if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) { + unsigned int num_cams; + + /* use a quarter of the TLBCAM for bolted linear map */ + num_cams = (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) / 4; + linear_map_top = map_mem_in_cams(linear_map_top, num_cams); + + /* limit memory so we dont have linear faults */ + memblock_enforce_memory_limit(linear_map_top); + memblock_analyze(); + } +#endif + /* A sync won't hurt us after mucking around with * the MMU configuration */ mb(); + + memblock_set_current_limit(linear_map_top); } void __init early_init_mmu(void) @@ -521,4 +573,18 @@ void __cpuinit early_init_mmu_secondary(void) __early_init_mmu(0); } +void setup_initial_memory_limit(phys_addr_t first_memblock_base, + phys_addr_t first_memblock_size) +{ + /* On Embedded 64-bit, we adjust the RMA size to match + * the bolted TLB entry. We know for now that only 1G + * entries are supported though that may eventually + * change. We crop it to the size of the first MEMBLOCK to + * avoid going over total available memory just in case... + */ + ppc64_rma_size = min_t(u64, first_memblock_size, 0x40000000); + + /* Finally limit subsequent allocations */ + memblock_set_current_limit(ppc64_memblock_base + ppc64_rma_size); +} #endif /* CONFIG_PPC64 */ |