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Diffstat (limited to '')
-rw-r--r-- | arch/powerpc/include/asm/pgtable-types.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgtable-types.h b/arch/powerpc/include/asm/pgtable-types.h new file mode 100644 index 000000000..082c85cc0 --- /dev/null +++ b/arch/powerpc/include/asm/pgtable-types.h @@ -0,0 +1,95 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_PGTABLE_TYPES_H +#define _ASM_POWERPC_PGTABLE_TYPES_H + +#if defined(__CHECKER__) || !defined(CONFIG_PPC32) +#define STRICT_MM_TYPECHECKS +#endif + +/* PTE level */ +#if defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES) +typedef struct { pte_basic_t pte, pte1, pte2, pte3; } pte_t; +#elif defined(STRICT_MM_TYPECHECKS) +typedef struct { pte_basic_t pte; } pte_t; +#else +typedef pte_basic_t pte_t; +#endif + +#if defined(STRICT_MM_TYPECHECKS) || \ + (defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES)) +#define __pte(x) ((pte_t) { (x) }) +static inline pte_basic_t pte_val(pte_t x) +{ + return x.pte; +} +#else +#define __pte(x) ((pte_t)(x)) +static inline pte_basic_t pte_val(pte_t x) +{ + return x; +} +#endif + +/* PMD level */ +#ifdef CONFIG_PPC64 +typedef struct { unsigned long pmd; } pmd_t; +#define __pmd(x) ((pmd_t) { (x) }) +static inline unsigned long pmd_val(pmd_t x) +{ + return x.pmd; +} + +/* 64 bit always use 4 level table. */ +typedef struct { unsigned long pud; } pud_t; +#define __pud(x) ((pud_t) { (x) }) +static inline unsigned long pud_val(pud_t x) +{ + return x.pud; +} +#endif /* CONFIG_PPC64 */ + +/* PGD level */ +typedef struct { unsigned long pgd; } pgd_t; +#define __pgd(x) ((pgd_t) { (x) }) +static inline unsigned long pgd_val(pgd_t x) +{ + return x.pgd; +} + +/* Page protection bits */ +typedef struct { unsigned long pgprot; } pgprot_t; +#define pgprot_val(x) ((x).pgprot) +#define __pgprot(x) ((pgprot_t) { (x) }) + +/* + * With hash config 64k pages additionally define a bigger "real PTE" type that + * gathers the "second half" part of the PTE for pseudo 64k pages + */ +#ifdef CONFIG_PPC_64K_PAGES +typedef struct { pte_t pte; unsigned long hidx; } real_pte_t; +#else +typedef struct { pte_t pte; } real_pte_t; +#endif + +#ifdef CONFIG_PPC_BOOK3S_64 +#include <asm/cmpxchg.h> + +static inline bool pte_xchg(pte_t *ptep, pte_t old, pte_t new) +{ + unsigned long *p = (unsigned long *)ptep; + + /* See comment in switch_mm_irqs_off() */ + return pte_val(old) == __cmpxchg_u64(p, pte_val(old), pte_val(new)); +} +#endif + +#ifdef CONFIG_ARCH_HAS_HUGEPD +typedef struct { unsigned long pd; } hugepd_t; +#define __hugepd(x) ((hugepd_t) { (x) }) +static inline unsigned long hpd_val(hugepd_t x) +{ + return x.pd; +} +#endif + +#endif /* _ASM_POWERPC_PGTABLE_TYPES_H */ |