| /* |
| * Port on Texas Instruments TMS320C6x architecture |
| * |
| * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated |
| * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.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. |
| */ |
| #ifndef _ASM_C6X_PGTABLE_H |
| #define _ASM_C6X_PGTABLE_H |
| |
| #include <asm-generic/4level-fixup.h> |
| |
| #include <asm/setup.h> |
| #include <asm/page.h> |
| |
| /* |
| * All 32bit addresses are effectively valid for vmalloc... |
| * Sort of meaningless for non-VM targets. |
| */ |
| #define VMALLOC_START 0 |
| #define VMALLOC_END 0xffffffff |
| |
| #define pgd_present(pgd) (1) |
| #define pgd_none(pgd) (0) |
| #define pgd_bad(pgd) (0) |
| #define pgd_clear(pgdp) |
| #define kern_addr_valid(addr) (1) |
| |
| #define pmd_offset(a, b) ((void *)0) |
| #define pmd_none(x) (!pmd_val(x)) |
| #define pmd_present(x) (pmd_val(x)) |
| #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) |
| #define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK) |
| |
| #define PAGE_NONE __pgprot(0) /* these mean nothing to NO_MM */ |
| #define PAGE_SHARED __pgprot(0) /* these mean nothing to NO_MM */ |
| #define PAGE_COPY __pgprot(0) /* these mean nothing to NO_MM */ |
| #define PAGE_READONLY __pgprot(0) /* these mean nothing to NO_MM */ |
| #define PAGE_KERNEL __pgprot(0) /* these mean nothing to NO_MM */ |
| #define pgprot_noncached(prot) (prot) |
| |
| extern void paging_init(void); |
| |
| #define __swp_type(x) (0) |
| #define __swp_offset(x) (0) |
| #define __swp_entry(typ, off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) |
| #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
| #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) |
| |
| #define set_pte(pteptr, pteval) (*(pteptr) = pteval) |
| #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) |
| |
| /* |
| * ZERO_PAGE is a global shared page that is always zero: used |
| * for zero-mapped memory areas etc.. |
| */ |
| #define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page) |
| extern unsigned long empty_zero_page; |
| |
| #define swapper_pg_dir ((pgd_t *) 0) |
| |
| /* |
| * No page table caches to initialise |
| */ |
| #define pgtable_cache_init() do { } while (0) |
| |
| /* |
| * c6x is !MMU, so define the simpliest implementation |
| */ |
| #define pgprot_writecombine pgprot_noncached |
| |
| #include <asm-generic/pgtable.h> |
| |
| #endif /* _ASM_C6X_PGTABLE_H */ |
