/* 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/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 */