diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-01 11:51:57 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-01 11:51:57 -0700 |
commit | 81f56e5375e84689b891e0e6c5a02ec12a1f18d9 (patch) | |
tree | a1e128a71ff24fc705428df86a858076cfe4bc13 /arch/arm64/mm/tlb.S | |
parent | 6c09931b3f987898f5c581d267ef269f5e2e9575 (diff) | |
parent | 27aa55c5e5123fa8b8ad0156559d34d7edff58ca (diff) |
Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64
Pull arm64 support from Catalin Marinas:
"Linux support for the 64-bit ARM architecture (AArch64)
Features currently supported:
- 39-bit address space for user and kernel (each)
- 4KB and 64KB page configurations
- Compat (32-bit) user applications (ARMv7, EABI only)
- Flattened Device Tree (mandated for all AArch64 platforms)
- ARM generic timers"
* tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: (35 commits)
arm64: ptrace: remove obsolete ptrace request numbers from user headers
arm64: Do not set the SMP/nAMP processor bit
arm64: MAINTAINERS update
arm64: Build infrastructure
arm64: Miscellaneous header files
arm64: Generic timers support
arm64: Loadable modules
arm64: Miscellaneous library functions
arm64: Performance counters support
arm64: Add support for /proc/sys/debug/exception-trace
arm64: Debugging support
arm64: Floating point and SIMD
arm64: 32-bit (compat) applications support
arm64: User access library functions
arm64: Signal handling support
arm64: VDSO support
arm64: System calls handling
arm64: ELF definitions
arm64: SMP support
arm64: DMA mapping API
...
Diffstat (limited to 'arch/arm64/mm/tlb.S')
-rw-r--r-- | arch/arm64/mm/tlb.S | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm64/mm/tlb.S b/arch/arm64/mm/tlb.S new file mode 100644 index 000000000000..8ae80a18e8ec --- /dev/null +++ b/arch/arm64/mm/tlb.S @@ -0,0 +1,71 @@ +/* + * Based on arch/arm/mm/tlb.S + * + * Copyright (C) 1997-2002 Russell King + * Copyright (C) 2012 ARM Ltd. + * Written by Catalin Marinas <catalin.marinas@arm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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, see <http://www.gnu.org/licenses/>. + */ +#include <linux/linkage.h> +#include <asm/assembler.h> +#include <asm/asm-offsets.h> +#include <asm/page.h> +#include <asm/tlbflush.h> +#include "proc-macros.S" + +/* + * __cpu_flush_user_tlb_range(start, end, vma) + * + * Invalidate a range of TLB entries in the specified address space. + * + * - start - start address (may not be aligned) + * - end - end address (exclusive, may not be aligned) + * - vma - vma_struct describing address range + */ +ENTRY(__cpu_flush_user_tlb_range) + vma_vm_mm x3, x2 // get vma->vm_mm + mmid x3, x3 // get vm_mm->context.id + dsb sy + lsr x0, x0, #12 // align address + lsr x1, x1, #12 + bfi x0, x3, #48, #16 // start VA and ASID + bfi x1, x3, #48, #16 // end VA and ASID +1: tlbi vae1is, x0 // TLB invalidate by address and ASID + add x0, x0, #1 + cmp x0, x1 + b.lo 1b + dsb sy + ret +ENDPROC(__cpu_flush_user_tlb_range) + +/* + * __cpu_flush_kern_tlb_range(start,end) + * + * Invalidate a range of kernel TLB entries. + * + * - start - start address (may not be aligned) + * - end - end address (exclusive, may not be aligned) + */ +ENTRY(__cpu_flush_kern_tlb_range) + dsb sy + lsr x0, x0, #12 // align address + lsr x1, x1, #12 +1: tlbi vaae1is, x0 // TLB invalidate by address + add x0, x0, #1 + cmp x0, x1 + b.lo 1b + dsb sy + isb + ret +ENDPROC(__cpu_flush_kern_tlb_range) |