diff options
Diffstat (limited to 'arch/sh/kernel/cpu/sh5/entry.S')
| -rw-r--r-- | arch/sh/kernel/cpu/sh5/entry.S | 104 |
1 files changed, 10 insertions, 94 deletions
diff --git a/arch/sh/kernel/cpu/sh5/entry.S b/arch/sh/kernel/cpu/sh5/entry.S index 6b80295dd7a4..b7cf6a547f11 100644 --- a/arch/sh/kernel/cpu/sh5/entry.S +++ b/arch/sh/kernel/cpu/sh5/entry.S @@ -335,7 +335,7 @@ tlb_miss: /* If the fast path handler fixed the fault, just drop through quickly to the restore code right away to return to the excepting context. */ - beqi/u r2, 0, tr1 + bnei/u r2, 0, tr1 fast_tlb_miss_restore: ld.q SP, SAVED_TR0, r2 @@ -1079,9 +1079,8 @@ restore_all: * * Kernel TLB fault handlers will get a slightly different interface. * (r2) struct pt_regs *, original register's frame pointer - * (r3) writeaccess, whether it's a store fault as opposed to load fault - * (r4) execaccess, whether it's a ITLB fault as opposed to DTLB fault - * (r5) Effective Address of fault + * (r3) page fault error code (see asm/thread_info.h) + * (r4) Effective Address of fault * (LINK) return address * (SP) = r2 * @@ -1092,26 +1091,25 @@ restore_all: tlb_miss_load: or SP, ZERO, r2 or ZERO, ZERO, r3 /* Read */ - or ZERO, ZERO, r4 /* Data */ - getcon TEA, r5 + getcon TEA, r4 pta call_do_page_fault, tr0 beq ZERO, ZERO, tr0 tlb_miss_store: or SP, ZERO, r2 - movi 1, r3 /* Write */ - or ZERO, ZERO, r4 /* Data */ - getcon TEA, r5 + movi FAULT_CODE_WRITE, r3 /* Write */ + getcon TEA, r4 pta call_do_page_fault, tr0 beq ZERO, ZERO, tr0 itlb_miss_or_IRQ: pta its_IRQ, tr0 beqi/u r4, EVENT_INTERRUPT, tr0 + + /* ITLB miss */ or SP, ZERO, r2 - or ZERO, ZERO, r3 /* Read */ - movi 1, r4 /* Text */ - getcon TEA, r5 + movi FAULT_CODE_ITLB, r3 + getcon TEA, r4 /* Fall through */ call_do_page_fault: @@ -1571,86 +1569,6 @@ ___clear_user_exit: #endif /* CONFIG_MMU */ /* - * int __strncpy_from_user(unsigned long __dest, unsigned long __src, - * int __count) - * - * Inputs: - * (r2) target address - * (r3) source address - * (r4) maximum size in bytes - * - * Ouputs: - * (*r2) copied data - * (r2) -EFAULT (in case of faulting) - * copied data (otherwise) - */ - .global __strncpy_from_user -__strncpy_from_user: - pta ___strncpy_from_user1, tr0 - pta ___strncpy_from_user_done, tr1 - or r4, ZERO, r5 /* r5 = original count */ - beq/u r4, r63, tr1 /* early exit if r4==0 */ - movi -(EFAULT), r6 /* r6 = reply, no real fixup */ - or ZERO, ZERO, r7 /* r7 = data, clear top byte of data */ - -___strncpy_from_user1: - ld.b r3, 0, r7 /* Fault address: only in reading */ - st.b r2, 0, r7 - addi r2, 1, r2 - addi r3, 1, r3 - beq/u ZERO, r7, tr1 - addi r4, -1, r4 /* return real number of copied bytes */ - bne/l ZERO, r4, tr0 - -___strncpy_from_user_done: - sub r5, r4, r6 /* If done, return copied */ - -___strncpy_from_user_exit: - or r6, ZERO, r2 - ptabs LINK, tr0 - blink tr0, ZERO - -/* - * extern long __strnlen_user(const char *__s, long __n) - * - * Inputs: - * (r2) source address - * (r3) source size in bytes - * - * Ouputs: - * (r2) -EFAULT (in case of faulting) - * string length (otherwise) - */ - .global __strnlen_user -__strnlen_user: - pta ___strnlen_user_set_reply, tr0 - pta ___strnlen_user1, tr1 - or ZERO, ZERO, r5 /* r5 = counter */ - movi -(EFAULT), r6 /* r6 = reply, no real fixup */ - or ZERO, ZERO, r7 /* r7 = data, clear top byte of data */ - beq r3, ZERO, tr0 - -___strnlen_user1: - ldx.b r2, r5, r7 /* Fault address: only in reading */ - addi r3, -1, r3 /* No real fixup */ - addi r5, 1, r5 - beq r3, ZERO, tr0 - bne r7, ZERO, tr1 -! The line below used to be active. This meant led to a junk byte lying between each pair -! of entries in the argv & envp structures in memory. Whilst the program saw the right data -! via the argv and envp arguments to main, it meant the 'flat' representation visible through -! /proc/$pid/cmdline was corrupt, causing trouble with ps, for example. -! addi r5, 1, r5 /* Include '\0' */ - -___strnlen_user_set_reply: - or r5, ZERO, r6 /* If done, return counter */ - -___strnlen_user_exit: - or r6, ZERO, r2 - ptabs LINK, tr0 - blink tr0, ZERO - -/* * extern long __get_user_asm_?(void *val, long addr) * * Inputs: @@ -1984,8 +1902,6 @@ asm_uaccess_start: .long ___copy_user2, ___copy_user_exit .long ___clear_user1, ___clear_user_exit #endif - .long ___strncpy_from_user1, ___strncpy_from_user_exit - .long ___strnlen_user1, ___strnlen_user_exit .long ___get_user_asm_b1, ___get_user_asm_b_exit .long ___get_user_asm_w1, ___get_user_asm_w_exit .long ___get_user_asm_l1, ___get_user_asm_l_exit |