diff options
Diffstat (limited to 'arch/score')
| -rw-r--r-- | arch/score/include/asm/irq.h | 2 | ||||
| -rw-r--r-- | arch/score/include/asm/irq_regs.h | 7 | ||||
| -rw-r--r-- | arch/score/include/asm/linkage.h | 3 | ||||
| -rw-r--r-- | arch/score/include/asm/page.h | 4 | ||||
| -rw-r--r-- | arch/score/include/asm/pgalloc.h | 2 | ||||
| -rw-r--r-- | arch/score/include/asm/pgtable.h | 31 | ||||
| -rw-r--r-- | arch/score/include/asm/ptrace.h | 8 | ||||
| -rw-r--r-- | arch/score/include/asm/uaccess.h | 433 | ||||
| -rw-r--r-- | arch/score/include/asm/user.h | 17 |
9 files changed, 472 insertions, 35 deletions
diff --git a/arch/score/include/asm/irq.h b/arch/score/include/asm/irq.h index 6edd2a2..c883f3d 100644 --- a/arch/score/include/asm/irq.h +++ b/arch/score/include/asm/irq.h @@ -20,4 +20,6 @@ #define IRQ_TIMER (7) /* Timer IRQ number of SPCT6600 */ +extern void interrupt_exception_vector(void); + #endif /* _ASM_SCORE_IRQ_H */ diff --git a/arch/score/include/asm/irq_regs.h b/arch/score/include/asm/irq_regs.h index 905b7b0..b8e881c 100644 --- a/arch/score/include/asm/irq_regs.h +++ b/arch/score/include/asm/irq_regs.h @@ -1,6 +1,11 @@ #ifndef _ASM_SCORE_IRQ_REGS_H #define _ASM_SCORE_IRQ_REGS_H -#include <asm-generic/irq_regs.h> +#include <linux/thread_info.h> + +static inline struct pt_regs *get_irq_regs(void) +{ + return current_thread_info()->regs; +} #endif /* _ASM_SCORE_IRQ_REGS_H */ diff --git a/arch/score/include/asm/linkage.h b/arch/score/include/asm/linkage.h index 2580fbb..2323a8e 100644 --- a/arch/score/include/asm/linkage.h +++ b/arch/score/include/asm/linkage.h @@ -1,4 +1,7 @@ #ifndef _ASM_SCORE_LINKAGE_H #define _ASM_SCORE_LINKAGE_H +#define __ALIGN .align 2 +#define __ALIGN_STR ".align 2" + #endif /* _ASM_SCORE_LINKAGE_H */ diff --git a/arch/score/include/asm/page.h b/arch/score/include/asm/page.h index 67e9820..ee58210 100644 --- a/arch/score/include/asm/page.h +++ b/arch/score/include/asm/page.h @@ -57,8 +57,8 @@ extern unsigned long max_low_pfn; extern unsigned long min_low_pfn; extern unsigned long max_pfn; -#define __pa(vaddr) ((unsigned long) (vaddr)) -#define __va(paddr) ((void *) (paddr)) +#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) +#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) #define phys_to_pfn(phys) (PFN_DOWN(phys)) #define pfn_to_phys(pfn) (PFN_PHYS(pfn)) diff --git a/arch/score/include/asm/pgalloc.h b/arch/score/include/asm/pgalloc.h index 28dacc1..059a61b 100644 --- a/arch/score/include/asm/pgalloc.h +++ b/arch/score/include/asm/pgalloc.h @@ -72,7 +72,7 @@ static inline void pte_free(struct mm_struct *mm, pgtable_t pte) __free_pages(pte, PTE_ORDER); } -#define __pte_free_tlb(tlb, pte) \ +#define __pte_free_tlb(tlb, pte, buf) \ do { \ pgtable_page_dtor(pte); \ tlb_remove_page((tlb), pte); \ diff --git a/arch/score/include/asm/pgtable.h b/arch/score/include/asm/pgtable.h index 5e913e5..674934b 100644 --- a/arch/score/include/asm/pgtable.h +++ b/arch/score/include/asm/pgtable.h @@ -106,7 +106,8 @@ static inline void pmd_clear(pmd_t *pmdp) ((swp_entry_t) { pte_val(pte)}) #define __swp_entry_to_pte(x) ((pte_t) {(x).val}) -#define pmd_page(pmd) virt_to_page(__va(pmd_val(pmd))) +#define pmd_phys(pmd) __pa((void *)pmd_val(pmd)) +#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) #define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot) static inline pte_t pte_mkspecial(pte_t pte) { return pte; } @@ -129,14 +130,11 @@ static inline pte_t pte_mkspecial(pte_t pte) { return pte; } #define pgd_clear(pgdp) do { } while (0) #define kern_addr_valid(addr) (1) -#define pmd_offset(a, b) ((void *) 0) #define pmd_page_vaddr(pmd) pmd_val(pmd) #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) -#define pud_offset(pgd, address) ((pud_t *) pgd) - #define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_CACHE) #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ _PAGE_CACHE) @@ -165,15 +163,27 @@ static inline pte_t pte_mkspecial(pte_t pte) { return pte; } #define __S110 PAGE_SHARED #define __S111 PAGE_SHARED -#define pgprot_noncached(x) (x) +#define pgprot_noncached pgprot_noncached + +static inline pgprot_t pgprot_noncached(pgprot_t _prot) +{ + unsigned long prot = pgprot_val(_prot); + + prot = (prot & ~_CACHE_MASK); + + return __pgprot(prot); +} -#define __swp_type(x) (0) -#define __swp_offset(x) (0) -#define __swp_entry(typ, off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) +#define __swp_type(x) ((x).val & 0x1f) +#define __swp_offset(x) ((x).val >> 11) +#define __swp_entry(type, offset) ((swp_entry_t){(type) | ((offset) << 11)}) -#define ZERO_PAGE(vaddr) ({ BUG(); NULL; }) +extern unsigned long empty_zero_page; +extern unsigned long zero_page_mask; -#define swapper_pg_dir ((pgd_t *) NULL) +#define ZERO_PAGE(vaddr) \ + (virt_to_page((void *)(empty_zero_page + \ + (((unsigned long)(vaddr)) & zero_page_mask)))) #define pgtable_cache_init() do {} while (0) @@ -248,6 +258,7 @@ static inline pte_t pte_mkyoung(pte_t pte) #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) extern unsigned long pgd_current; +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; extern void paging_init(void); static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) diff --git a/arch/score/include/asm/ptrace.h b/arch/score/include/asm/ptrace.h index 66b14c8..d40e691 100644 --- a/arch/score/include/asm/ptrace.h +++ b/arch/score/include/asm/ptrace.h @@ -51,9 +51,11 @@ * system call/exception. As usual the registers k0/k1 aren't being saved. */ struct pt_regs { - unsigned long pad0[6]; + unsigned long pad0[6]; /* stack arguments */ unsigned long orig_r4; unsigned long orig_r7; + long is_syscall; + unsigned long regs[32]; unsigned long cel; @@ -68,12 +70,12 @@ struct pt_regs { unsigned long cp0_psr; unsigned long cp0_ecr; unsigned long cp0_condition; - - long is_syscall; }; #ifdef __KERNEL__ +struct task_struct; + /* * Does the process account for user or for system time? */ diff --git a/arch/score/include/asm/uaccess.h b/arch/score/include/asm/uaccess.h index 6f09e2b..ab66ddd 100644 --- a/arch/score/include/asm/uaccess.h +++ b/arch/score/include/asm/uaccess.h @@ -1,27 +1,424 @@ -#ifndef _ASM_SCORE_UACCESS_H -#define _ASM_SCORE_UACCESS_H +#ifndef __SCORE_UACCESS_H +#define __SCORE_UACCESS_H + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/thread_info.h> + +#define VERIFY_READ 0 +#define VERIFY_WRITE 1 + +#define get_ds() (KERNEL_DS) +#define get_fs() (current_thread_info()->addr_limit) +#define segment_eq(a, b) ((a).seg == (b).seg) + /* - * Copyright (C) 2006 Atmark Techno, Inc. + * Is a address valid? This does a straighforward calculation rather + * than tests. + * + * Address valid if: + * - "addr" doesn't have any high-bits set + * - AND "size" doesn't have any high-bits set + * - AND "addr+size" doesn't have any high-bits set + * - OR we are in kernel mode. * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. + * __ua_size() is a trick to avoid runtime checking of positive constant + * sizes; for those we already know at compile time that the size is ok. */ -struct pt_regs; -extern int fixup_exception(struct pt_regs *regs); +#define __ua_size(size) \ + ((__builtin_constant_p(size) && (signed long) (size) > 0) ? 0 : (size)) + +/* + * access_ok: - Checks if a user space pointer is valid + * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE. Note that + * %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe + * to write to a block, it is always safe to read from it. + * @addr: User space pointer to start of block to check + * @size: Size of block to check + * + * Context: User context only. This function may sleep. + * + * Checks if a pointer to a block of memory in user space is valid. + * + * Returns true (nonzero) if the memory block may be valid, false (zero) + * if it is definitely invalid. + * + * Note that, depending on architecture, this function probably just + * checks that the pointer is in the user space range - after calling + * this function, memory access functions may still return -EFAULT. + */ + +#define __access_ok(addr, size) \ + (((long)((get_fs().seg) & \ + ((addr) | ((addr) + (size)) | \ + __ua_size(size)))) == 0) + +#define access_ok(type, addr, size) \ + likely(__access_ok((unsigned long)(addr), (size))) + +/* + * put_user: - Write a simple value into user space. + * @x: Value to copy to user space. + * @ptr: Destination address, in user space. + * + * Context: User context only. This function may sleep. + * + * This macro copies a single simple value from kernel space to user + * space. It supports simple types like char and int, but not larger + * data types like structures or arrays. + * + * @ptr must have pointer-to-simple-variable type, and @x must be assignable + * to the result of dereferencing @ptr. + * + * Returns zero on success, or -EFAULT on error. + */ +#define put_user(x, ptr) __put_user_check((x), (ptr), sizeof(*(ptr))) + +/* + * get_user: - Get a simple variable from user space. + * @x: Variable to store result. + * @ptr: Source address, in user space. + * + * Context: User context only. This function may sleep. + * + * This macro copies a single simple variable from user space to kernel + * space. It supports simple types like char and int, but not larger + * data types like structures or arrays. + * + * @ptr must have pointer-to-simple-variable type, and the result of + * dereferencing @ptr must be assignable to @x without a cast. + * + * Returns zero on success, or -EFAULT on error. + * On error, the variable @x is set to zero. + */ +#define get_user(x, ptr) __get_user_check((x), (ptr), sizeof(*(ptr))) + +/* + * __put_user: - Write a simple value into user space, with less checking. + * @x: Value to copy to user space. + * @ptr: Destination address, in user space. + * + * Context: User context only. This function may sleep. + * + * This macro copies a single simple value from kernel space to user + * space. It supports simple types like char and int, but not larger + * data types like structures or arrays. + * + * @ptr must have pointer-to-simple-variable type, and @x must be assignable + * to the result of dereferencing @ptr. + * + * Caller must check the pointer with access_ok() before calling this + * function. + * + * Returns zero on success, or -EFAULT on error. + */ +#define __put_user(x, ptr) __put_user_nocheck((x), (ptr), sizeof(*(ptr))) + +/* + * __get_user: - Get a simple variable from user space, with less checking. + * @x: Variable to store result. + * @ptr: Source address, in user space. + * + * Context: User context only. This function may sleep. + * + * This macro copies a single simple variable from user space to kernel + * space. It supports simple types like char and int, but not larger + * data types like structures or arrays. + * + * @ptr must have pointer-to-simple-variable type, and the result of + * dereferencing @ptr must be assignable to @x without a cast. + * + * Caller must check the pointer with access_ok() before calling this + * function. + * + * Returns zero on success, or -EFAULT on error. + * On error, the variable @x is set to zero. + */ +#define __get_user(x, ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr))) + +struct __large_struct { unsigned long buf[100]; }; +#define __m(x) (*(struct __large_struct __user *)(x)) + +/* + * Yuck. We need two variants, one for 64bit operation and one + * for 32 bit mode and old iron. + */ +extern void __get_user_unknown(void); + +#define __get_user_common(val, size, ptr) \ +do { \ + switch (size) { \ + case 1: \ + __get_user_asm(val, "lb", ptr); \ + break; \ + case 2: \ + __get_user_asm(val, "lh", ptr); \ + break; \ + case 4: \ + __get_user_asm(val, "lw", ptr); \ + break; \ + case 8: \ + if ((copy_from_user((void *)&val, ptr, 8)) == 0) \ + __gu_err = 0; \ + else \ + __gu_err = -EFAULT; \ + break; \ + default: \ + __get_user_unknown(); \ + break; \ + } \ +} while (0) + +#define __get_user_nocheck(x, ptr, size) \ +({ \ + long __gu_err = 0; \ + __get_user_common((x), size, ptr); \ + __gu_err; \ +}) + +#define __get_user_check(x, ptr, size) \ +({ \ + long __gu_err = -EFAULT; \ + const __typeof__(*(ptr)) __user *__gu_ptr = (ptr); \ + \ + if (likely(access_ok(VERIFY_READ, __gu_ptr, size))) \ + __get_user_common((x), size, __gu_ptr); \ + \ + __gu_err; \ +}) + +#define __get_user_asm(val, insn, addr) \ +{ \ + long __gu_tmp; \ + \ + __asm__ __volatile__( \ + "1:" insn " %1, %3\n" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:li %0, %4\n" \ + "j 2b\n" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n" \ + ".word 1b, 3b\n" \ + ".previous\n" \ + : "=r" (__gu_err), "=r" (__gu_tmp) \ + : "0" (0), "o" (__m(addr)), "i" (-EFAULT)); \ + \ + (val) = (__typeof__(*(addr))) __gu_tmp; \ +} + +/* + * Yuck. We need two variants, one for 64bit operation and one + * for 32 bit mode and old iron. + */ +#define __put_user_nocheck(val, ptr, size) \ +({ \ + __typeof__(*(ptr)) __pu_val; \ + long __pu_err = 0; \ + \ + __pu_val = (val); \ + switch (size) { \ + case 1: \ + __put_user_asm("sb", ptr); \ + break; \ + case 2: \ + __put_user_asm("sh", ptr); \ + break; \ + case 4: \ + __put_user_asm("sw", ptr); \ + break; \ + case 8: \ + if ((__copy_to_user((void *)ptr, &__pu_val, 8)) == 0) \ + __pu_err = 0; \ + else \ + __pu_err = -EFAULT; \ + break; \ + default: \ + __put_user_unknown(); \ + break; \ + } \ + __pu_err; \ +}) + + +#define __put_user_check(val, ptr, size) \ +({ \ + __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ + __typeof__(*(ptr)) __pu_val = (val); \ + long __pu_err = -EFAULT; \ + \ + if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) { \ + switch (size) { \ + case 1: \ + __put_user_asm("sb", __pu_addr); \ + break; \ + case 2: \ + __put_user_asm("sh", __pu_addr); \ + break; \ + case 4: \ + __put_user_asm("sw", __pu_addr); \ + break; \ + case 8: \ + if ((__copy_to_user((void *)__pu_addr, &__pu_val, 8)) == 0)\ + __pu_err = 0; \ + else \ + __pu_err = -EFAULT; \ + break; \ + default: \ + __put_user_unknown(); \ + break; \ + } \ + } \ + __pu_err; \ +}) + +#define __put_user_asm(insn, ptr) \ + __asm__ __volatile__( \ + "1:" insn " %2, %3\n" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:li %0, %4\n" \ + "j 2b\n" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n" \ + ".word 1b, 3b\n" \ + ".previous\n" \ + : "=r" (__pu_err) \ + : "0" (0), "r" (__pu_val), "o" (__m(ptr)), \ + "i" (-EFAULT)); + +extern void __put_user_unknown(void); +extern int __copy_tofrom_user(void *to, const void *from, unsigned long len); + +static inline unsigned long +copy_from_user(void *to, const void *from, unsigned long len) +{ + unsigned long over; + + if (access_ok(VERIFY_READ, from, len)) + return __copy_tofrom_user(to, from, len); + + if ((unsigned long)from < TASK_SIZE) { + over = (unsigned long)from + len - TASK_SIZE; + return __copy_tofrom_user(to, from, len - over) + over; + } + return len; +} + +static inline unsigned long +copy_to_user(void *to, const void *from, unsigned long len) +{ + unsigned long over; + + if (access_ok(VERIFY_WRITE, to, len)) + return __copy_tofrom_user(to, from, len); + + if ((unsigned long)to < TASK_SIZE) { + over = (unsigned long)to + len - TASK_SIZE; + return __copy_tofrom_user(to, from, len - over) + over; + } + return len; +} -#ifndef __ASSEMBLY__ +#define __copy_from_user(to, from, len) \ + __copy_tofrom_user((to), (from), (len)) -#define __range_ok(addr, size) \ - ((((unsigned long __force)(addr) >= 0x80000000) \ - || ((unsigned long)(size) > 0x80000000) \ - || (((unsigned long __force)(addr) + (unsigned long)(size)) > 0x80000000))) +#define __copy_to_user(to, from, len) \ + __copy_tofrom_user((to), (from), (len)) -#define __access_ok(addr, size) \ - (__range_ok((addr), (size)) == 0) +static inline unsigned long +__copy_to_user_inatomic(void *to, const void *from, unsigned long len) +{ + return __copy_to_user(to, from, len); +} -#include <asm-generic/uaccess.h> +static inline unsigned long +__copy_from_user_inatomic(void *to, const void *from, unsigned long len) +{ + return __copy_from_user(to, from, len); +} + +#define __copy_in_user(to, from, len) __copy_from_user(to, from, len) + +static inline unsigned long +copy_in_user(void *to, const void *from, unsigned long len) +{ + if (access_ok(VERIFY_READ, from, len) && + access_ok(VERFITY_WRITE, to, len)) + return copy_from_user(to, from, len); +} + +/* + * __clear_user: - Zero a block of memory in user space, with less checking. + * @to: Destination address, in user space. + * @n: Number of bytes to zero. + * + * Zero a block of memory in user space. Caller must check + * the specified block with access_ok() before calling this function. + * + * Returns number of bytes that could not be cleared. + * On success, this will be zero. + */ +extern unsigned long __clear_user(void __user *src, unsigned long size); + +static inline unsigned long clear_user(char *src, unsigned long size) +{ + if (access_ok(VERIFY_WRITE, src, size)) + return __clear_user(src, size); + + return -EFAULT; +} +/* + * __strncpy_from_user: - Copy a NUL terminated string from userspace, with less checking. + * @dst: Destination address, in kernel space. This buffer must be at + * least @count bytes long. + * @src: Source address, in user space. + * @count: Maximum number of bytes to copy, including the trailing NUL. + * + * Copies a NUL-terminated string from userspace to kernel space. + * Caller must check the specified block with access_ok() before calling + * this function. + * + * On success, returns the length of the string (not including the trailing + * NUL). + * + * If access to userspace fails, returns -EFAULT (some data may have been + * copied). + * + * If @count is smaller than the length of the string, copies @count bytes + * and returns @count. + */ +extern int __strncpy_from_user(char *dst, const char *src, long len); + +static inline int strncpy_from_user(char *dst, const char *src, long len) +{ + if (access_ok(VERIFY_READ, src, 1)) + return __strncpy_from_user(dst, src, len); + + return -EFAULT; +} + +extern int __strlen_user(const char *src); +static inline long strlen_user(const char __user *src) +{ + return __strlen_user(src); +} + +extern int __strnlen_user(const char *str, long len); +static inline long strnlen_user(const char __user *str, long len) +{ + if (!access_ok(VERIFY_READ, str, 0)) + return 0; + else + return __strnlen_user(str, len); +} + +struct exception_table_entry { + unsigned long insn; + unsigned long fixup; +}; + +extern int fixup_exception(struct pt_regs *regs); -#endif /* __ASSEMBLY__ */ +#endif /* __SCORE_UACCESS_H */ -#endif /* _ASM_SCORE_UACCESS_H */ diff --git a/arch/score/include/asm/user.h b/arch/score/include/asm/user.h index 3cf7572..7bfb8e2 100644 --- a/arch/score/include/asm/user.h +++ b/arch/score/include/asm/user.h @@ -1,4 +1,21 @@ #ifndef _ASM_SCORE_USER_H #define _ASM_SCORE_USER_H +struct user_regs_struct { + unsigned long regs[32]; + + unsigned long cel; + unsigned long ceh; + + unsigned long sr0; /* cnt */ + unsigned long sr1; /* lcr */ + unsigned long sr2; /* scr */ + + unsigned long cp0_epc; + unsigned long cp0_ema; + unsigned long cp0_psr; + unsigned long cp0_ecr; + unsigned long cp0_condition; +}; + #endif /* _ASM_SCORE_USER_H */ |
