diff options
Diffstat (limited to 'arch/c6x/include/asm/pgtable.h')
| -rw-r--r-- | arch/c6x/include/asm/pgtable.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/c6x/include/asm/pgtable.h b/arch/c6x/include/asm/pgtable.h new file mode 100644 index 000000000..8a91ceda3 --- /dev/null +++ b/arch/c6x/include/asm/pgtable.h @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + */ +#ifndef _ASM_C6X_PGTABLE_H +#define _ASM_C6X_PGTABLE_H + +#include <asm-generic/pgtable-nopud.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_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) + +/* + * c6x is !MMU, so define the simpliest implementation + */ +#define pgprot_writecombine pgprot_noncached + +#endif /* _ASM_C6X_PGTABLE_H */ |