diff options
Diffstat (limited to 'arch/mips/include/asm/page.h')
| -rw-r--r-- | arch/mips/include/asm/page.h | 156 |
1 files changed, 84 insertions, 72 deletions
diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h index f6be4741f7e8..bc3e3484c1bf 100644 --- a/arch/mips/include/asm/page.h +++ b/arch/mips/include/asm/page.h @@ -11,27 +11,33 @@ #include <spaces.h> #include <linux/const.h> +#include <linux/kernel.h> +#include <asm/mipsregs.h> + +#include <vdso/page.h> /* - * PAGE_SHIFT determines the page size + * This is used for calculating the real page sizes + * for FTLB or VTLB + FTLB configurations. */ -#ifdef CONFIG_PAGE_SIZE_4KB -#define PAGE_SHIFT 12 -#endif -#ifdef CONFIG_PAGE_SIZE_8KB -#define PAGE_SHIFT 13 -#endif -#ifdef CONFIG_PAGE_SIZE_16KB -#define PAGE_SHIFT 14 -#endif -#ifdef CONFIG_PAGE_SIZE_32KB -#define PAGE_SHIFT 15 -#endif -#ifdef CONFIG_PAGE_SIZE_64KB -#define PAGE_SHIFT 16 -#endif -#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) -#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) +static inline unsigned int page_size_ftlb(unsigned int mmuextdef) +{ + switch (mmuextdef) { + case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT: + if (PAGE_SIZE == (1 << 30)) + return 5; + if (PAGE_SIZE == (1llu << 32)) + return 6; + if (PAGE_SIZE > (256 << 10)) + return 7; /* reserved */ + fallthrough; + case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT: + return (PAGE_SHIFT - 10) / 2; + default: + panic("Invalid FTLB configuration with Conf4_mmuextdef=%d value\n", + mmuextdef >> 14); + } +} #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT #define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3) @@ -55,7 +61,12 @@ extern void build_copy_page(void); * used in our early mem init code for all memory models. * So always define it. */ -#define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET) +#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET +extern unsigned long ARCH_PFN_OFFSET; +# define ARCH_PFN_OFFSET ARCH_PFN_OFFSET +#else +# define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET) +#endif extern void clear_page(void * page); extern void copy_page(void * to, void * from); @@ -80,8 +91,6 @@ static inline void clear_user_page(void *addr, unsigned long vaddr, flush_data_cache_page((unsigned long)addr); } -extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, - struct page *to); struct vm_area_struct; extern void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, struct vm_area_struct *vma); @@ -91,7 +100,7 @@ extern void copy_user_highpage(struct page *to, struct page *from, /* * These are used to make use of C type-checking.. */ -#ifdef CONFIG_64BIT_PHYS_ADDR +#ifdef CONFIG_PHYS_ADDR_T_64BIT #ifdef CONFIG_CPU_MIPS32 typedef struct { unsigned long pte_low, pte_high; } pte_t; #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) @@ -126,6 +135,7 @@ typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pgprot_val(x) ((x).pgprot) #define __pgprot(x) ((pgprot_t) { (x) } ) +#define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK) /* * On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd @@ -139,74 +149,76 @@ typedef struct { unsigned long pgprot; } pgprot_t; /* * __pa()/__va() should be used only during mem init. */ -#ifdef CONFIG_64BIT -#define __pa(x) \ -({ \ - unsigned long __x = (unsigned long)(x); \ - __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x); \ -}) -#else -#define __pa(x) \ - ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET) -#endif +static inline unsigned long ___pa(unsigned long x) +{ + if (IS_ENABLED(CONFIG_64BIT)) { + /* + * For MIPS64 the virtual address may either be in one of + * the compatibility segments ckseg0 or ckseg1, or it may + * be in xkphys. + */ + return x < CKSEG0 ? XPHYSADDR(x) : CPHYSADDR(x); + } + + if (!IS_ENABLED(CONFIG_EVA)) { + /* + * We're using the standard MIPS32 legacy memory map, ie. + * the address x is going to be in kseg0 or kseg1. We can + * handle either case by masking out the desired bits using + * CPHYSADDR. + */ + return CPHYSADDR(x); + } + + /* + * EVA is in use so the memory map could be anything, making it not + * safe to just mask out bits. + */ + return x - PAGE_OFFSET + PHYS_OFFSET; +} +#define __pa(x) ___pa((unsigned long)(x)) #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) #include <asm/io.h> /* * RELOC_HIDE was originally added by 6007b903dfe5f1d13e0c711ac2894bdd4a61b1ad * (lmo) rsp. 8431fd094d625b94d364fe393076ccef88e6ce18 (kernel.org). The - * discussion can be found in lkml posting - * <a2ebde260608230500o3407b108hc03debb9da6e62c@mail.gmail.com> which is - * archived at http://lists.linuxcoding.com/kernel/2006-q3/msg17360.html + * discussion can be found in + * https://lore.kernel.org/lkml/a2ebde260608230500o3407b108hc03debb9da6e62c@mail.gmail.com * * It is unclear if the misscompilations mentioned in - * http://lkml.org/lkml/2010/8/8/138 also affect MIPS so we keep this one - * until GCC 3.x has been retired before we can apply - * https://patchwork.linux-mips.org/patch/1541/ + * https://lore.kernel.org/lkml/1281303490-390-1-git-send-email-namhyung@gmail.com + * also affect MIPS so we keep this one until GCC 3.x has been retired + * before we can apply https://patchwork.linux-mips.org/patch/1541/ */ +#define __pa_symbol_nodebug(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) -#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) - -#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) - -#ifdef CONFIG_FLATMEM - -static inline int pfn_valid(unsigned long pfn) -{ - /* avoid <linux/mm.h> include hell */ - extern unsigned long max_mapnr; - - return pfn >= ARCH_PFN_OFFSET && pfn < max_mapnr; -} - -#elif defined(CONFIG_SPARSEMEM) - -/* pfn_valid is defined in linux/mmzone.h */ - -#elif defined(CONFIG_NEED_MULTIPLE_NODES) - -#define pfn_valid(pfn) \ -({ \ - unsigned long __pfn = (pfn); \ - int __n = pfn_to_nid(__pfn); \ - ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \ - NODE_DATA(__n)->node_spanned_pages) \ - : 0); \ -}) +#ifdef CONFIG_DEBUG_VIRTUAL +extern phys_addr_t __phys_addr_symbol(unsigned long x); +#else +#define __phys_addr_symbol(x) __pa_symbol_nodebug(x) +#endif +#ifndef __pa_symbol +#define __pa_symbol(x) __phys_addr_symbol((unsigned long)(x)) #endif -#define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(virt_to_phys(kaddr))) +#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) -extern int __virt_addr_valid(const volatile void *kaddr); +#define virt_to_pfn(kaddr) PFN_DOWN(virt_to_phys((void *)(kaddr))) +#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) + +extern bool __virt_addr_valid(const volatile void *kaddr); #define virt_addr_valid(kaddr) \ __virt_addr_valid((const volatile void *) (kaddr)) -#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ - VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) +#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC -#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE) -#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET) +extern unsigned long __kaslr_offset; +static inline unsigned long kaslr_offset(void) +{ + return __kaslr_offset; +} #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> |