From 170c381f6bcd9ad3235654988aabddb612b34a39 Mon Sep 17 00:00:00 2001 From: Ley Foon Tan Date: Wed, 15 Apr 2015 10:45:49 +0800 Subject: nios2: remove end address checking for initda Remove the end address checking for initda function. We need to invalidate each address line for initda instruction, from start to end address. Signed-off-by: Ley Foon Tan --- arch/nios2/mm/cacheflush.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'arch/nios2') diff --git a/arch/nios2/mm/cacheflush.c b/arch/nios2/mm/cacheflush.c index 796642932e2e..a09b2b735803 100644 --- a/arch/nios2/mm/cacheflush.c +++ b/arch/nios2/mm/cacheflush.c @@ -58,9 +58,6 @@ static void __invalidate_dcache(unsigned long start, unsigned long end) end += (cpuinfo.dcache_line_size - 1); end &= ~(cpuinfo.dcache_line_size - 1); - if (end > start + cpuinfo.dcache_size) - end = start + cpuinfo.dcache_size; - for (addr = start; addr < end; addr += cpuinfo.dcache_line_size) { __asm__ __volatile__ (" initda 0(%0)\n" : /* Outputs */ -- cgit v1.2.3 From baa54ab93c2e1ced7e54f9c021fe102c0d39c090 Mon Sep 17 00:00:00 2001 From: Ley Foon Tan Date: Thu, 16 Apr 2015 15:19:01 +0800 Subject: nios2: rework trap handler Redefine trap handler as below: 0 N/A reserved for system calls 1 SIGUSR1 user-defined signal 1 2 SIGUSR2 user-defined signal 2 3 SIGILL illegal instruction 4..29 reserved (but implemented to raise SIGILL instead of being undefined) 30 SIGTRAP KGDB 31 SIGTRAP trace/breakpoint trap Signed-off-by: Ley Foon Tan --- arch/nios2/kernel/entry.S | 71 ++++++++++++++++++++++++++++------------------- arch/nios2/kernel/traps.c | 34 ++++++++++++++++++----- 2 files changed, 69 insertions(+), 36 deletions(-) (limited to 'arch/nios2') diff --git a/arch/nios2/kernel/entry.S b/arch/nios2/kernel/entry.S index 27b006c52e12..1e515ccd698e 100644 --- a/arch/nios2/kernel/entry.S +++ b/arch/nios2/kernel/entry.S @@ -92,35 +92,35 @@ exception_table: trap_table: .word handle_system_call /* 0 */ - .word instruction_trap /* 1 */ - .word instruction_trap /* 2 */ - .word instruction_trap /* 3 */ - .word instruction_trap /* 4 */ - .word instruction_trap /* 5 */ - .word instruction_trap /* 6 */ - .word instruction_trap /* 7 */ - .word instruction_trap /* 8 */ - .word instruction_trap /* 9 */ - .word instruction_trap /* 10 */ - .word instruction_trap /* 11 */ - .word instruction_trap /* 12 */ - .word instruction_trap /* 13 */ - .word instruction_trap /* 14 */ - .word instruction_trap /* 15 */ - .word instruction_trap /* 16 */ - .word instruction_trap /* 17 */ - .word instruction_trap /* 18 */ - .word instruction_trap /* 19 */ - .word instruction_trap /* 20 */ - .word instruction_trap /* 21 */ - .word instruction_trap /* 22 */ - .word instruction_trap /* 23 */ - .word instruction_trap /* 24 */ - .word instruction_trap /* 25 */ - .word instruction_trap /* 26 */ - .word instruction_trap /* 27 */ - .word instruction_trap /* 28 */ - .word instruction_trap /* 29 */ + .word handle_trap_1 /* 1 */ + .word handle_trap_2 /* 2 */ + .word handle_trap_3 /* 3 */ + .word handle_trap_reserved /* 4 */ + .word handle_trap_reserved /* 5 */ + .word handle_trap_reserved /* 6 */ + .word handle_trap_reserved /* 7 */ + .word handle_trap_reserved /* 8 */ + .word handle_trap_reserved /* 9 */ + .word handle_trap_reserved /* 10 */ + .word handle_trap_reserved /* 11 */ + .word handle_trap_reserved /* 12 */ + .word handle_trap_reserved /* 13 */ + .word handle_trap_reserved /* 14 */ + .word handle_trap_reserved /* 15 */ + .word handle_trap_reserved /* 16 */ + .word handle_trap_reserved /* 17 */ + .word handle_trap_reserved /* 18 */ + .word handle_trap_reserved /* 19 */ + .word handle_trap_reserved /* 20 */ + .word handle_trap_reserved /* 21 */ + .word handle_trap_reserved /* 22 */ + .word handle_trap_reserved /* 23 */ + .word handle_trap_reserved /* 24 */ + .word handle_trap_reserved /* 25 */ + .word handle_trap_reserved /* 26 */ + .word handle_trap_reserved /* 27 */ + .word handle_trap_reserved /* 28 */ + .word handle_trap_reserved /* 29 */ #ifdef CONFIG_KGDB .word handle_kgdb_breakpoint /* 30 KGDB breakpoint */ #else @@ -455,6 +455,19 @@ handle_kgdb_breakpoint: br ret_from_exception #endif +handle_trap_1: + call handle_trap_1_c + br ret_from_exception + +handle_trap_2: + call handle_trap_2_c + br ret_from_exception + +handle_trap_3: +handle_trap_reserved: + call handle_trap_3_c + br ret_from_exception + /* * Beware - when entering resume, prev (the current task) is * in r4, next (the new task) is in r5, don't change these diff --git a/arch/nios2/kernel/traps.c b/arch/nios2/kernel/traps.c index b7b97641a9a6..81f7da7b1d55 100644 --- a/arch/nios2/kernel/traps.c +++ b/arch/nios2/kernel/traps.c @@ -23,6 +23,17 @@ static DEFINE_SPINLOCK(die_lock); +static void _send_sig(int signo, int code, unsigned long addr) +{ + siginfo_t info; + + info.si_signo = signo; + info.si_errno = 0; + info.si_code = code; + info.si_addr = (void __user *) addr; + force_sig_info(signo, &info, current); +} + void die(const char *str, struct pt_regs *regs, long err) { console_verbose(); @@ -39,16 +50,10 @@ void die(const char *str, struct pt_regs *regs, long err) void _exception(int signo, struct pt_regs *regs, int code, unsigned long addr) { - siginfo_t info; - if (!user_mode(regs)) die("Exception in kernel mode", regs, signo); - info.si_signo = signo; - info.si_errno = 0; - info.si_code = code; - info.si_addr = (void __user *) addr; - force_sig_info(signo, &info, current); + _send_sig(signo, code, addr); } /* @@ -183,3 +188,18 @@ asmlinkage void unhandled_exception(struct pt_regs *regs, int cause) pr_emerg("opcode: 0x%08lx\n", *(unsigned long *)(regs->ea)); } + +asmlinkage void handle_trap_1_c(struct pt_regs *fp) +{ + _send_sig(SIGUSR1, 0, fp->ea); +} + +asmlinkage void handle_trap_2_c(struct pt_regs *fp) +{ + _send_sig(SIGUSR2, 0, fp->ea); +} + +asmlinkage void handle_trap_3_c(struct pt_regs *fp) +{ + _send_sig(SIGILL, ILL_ILLTRP, fp->ea); +} -- cgit v1.2.3 From 2009337e30cdae64405ea7b8fa1578b921508871 Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Fri, 24 Apr 2015 14:48:35 +0800 Subject: nios2: Add types.h header required for __u32 type Reported by the header checker (CONFIG_HEADERS_CHECK=y): CHECK usr/include/asm/ (31 files) ./usr/include/asm/ptrace.h:77: found __[us]{8,16,32,64} type without #include Signed-off-by: Ezequiel Garcia Acked-by: Ley Foon Tan --- arch/nios2/include/uapi/asm/ptrace.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/nios2') diff --git a/arch/nios2/include/uapi/asm/ptrace.h b/arch/nios2/include/uapi/asm/ptrace.h index eff00e67c0a2..1d35de90a977 100644 --- a/arch/nios2/include/uapi/asm/ptrace.h +++ b/arch/nios2/include/uapi/asm/ptrace.h @@ -14,6 +14,8 @@ #ifndef __ASSEMBLY__ +#include + /* * Register numbers used by 'ptrace' system call interface. */ -- cgit v1.2.3 From 1a70db49a735350f221959bf26e9a12f63a743bc Mon Sep 17 00:00:00 2001 From: Ley Foon Tan Date: Fri, 24 Apr 2015 14:18:55 +0800 Subject: nios2: rework cache - flush dcache before flush instruction cache - remork update_mmu_cache and flush_dcache_page - add shmparam.h Signed-off-by: Ley Foon Tan --- arch/nios2/include/asm/Kbuild | 1 - arch/nios2/include/asm/shmparam.h | 21 ++++++++++++++++ arch/nios2/mm/cacheflush.c | 52 +++++++++++++++++++++++++++------------ 3 files changed, 57 insertions(+), 17 deletions(-) create mode 100644 arch/nios2/include/asm/shmparam.h (limited to 'arch/nios2') diff --git a/arch/nios2/include/asm/Kbuild b/arch/nios2/include/asm/Kbuild index 01c75f36e8b3..24b3d8999ac7 100644 --- a/arch/nios2/include/asm/Kbuild +++ b/arch/nios2/include/asm/Kbuild @@ -46,7 +46,6 @@ generic-y += segment.h generic-y += sembuf.h generic-y += serial.h generic-y += shmbuf.h -generic-y += shmparam.h generic-y += siginfo.h generic-y += signal.h generic-y += socket.h diff --git a/arch/nios2/include/asm/shmparam.h b/arch/nios2/include/asm/shmparam.h new file mode 100644 index 000000000000..60784294e407 --- /dev/null +++ b/arch/nios2/include/asm/shmparam.h @@ -0,0 +1,21 @@ +/* + * Copyright Altera Corporation (C) <2015>. All rights reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ +#ifndef _ASM_NIOS2_SHMPARAM_H +#define _ASM_NIOS2_SHMPARAM_H + +#define SHMLBA CONFIG_NIOS2_DCACHE_SIZE + +#endif /* _ASM_NIOS2_SHMPARAM_H */ diff --git a/arch/nios2/mm/cacheflush.c b/arch/nios2/mm/cacheflush.c index a09b2b735803..223cdcc8203f 100644 --- a/arch/nios2/mm/cacheflush.c +++ b/arch/nios2/mm/cacheflush.c @@ -128,12 +128,14 @@ void flush_cache_dup_mm(struct mm_struct *mm) void flush_icache_range(unsigned long start, unsigned long end) { + __flush_dcache(start, end); __flush_icache(start, end); } void flush_dcache_range(unsigned long start, unsigned long end) { __flush_dcache(start, end); + __flush_icache(start, end); } EXPORT_SYMBOL(flush_dcache_range); @@ -156,6 +158,7 @@ void flush_icache_page(struct vm_area_struct *vma, struct page *page) unsigned long start = (unsigned long) page_address(page); unsigned long end = start + PAGE_SIZE; + __flush_dcache(start, end); __flush_icache(start, end); } @@ -170,6 +173,18 @@ void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, __flush_icache(start, end); } +void __flush_dcache_page(struct address_space *mapping, struct page *page) +{ + /* + * Writeback any data associated with the kernel mapping of this + * page. This ensures that data in the physical page is mutually + * coherent with the kernels mapping. + */ + unsigned long start = (unsigned long)page_address(page); + + __flush_dcache_all(start, start + PAGE_SIZE); +} + void flush_dcache_page(struct page *page) { struct address_space *mapping; @@ -187,11 +202,12 @@ void flush_dcache_page(struct page *page) if (mapping && !mapping_mapped(mapping)) { clear_bit(PG_dcache_clean, &page->flags); } else { - unsigned long start = (unsigned long)page_address(page); - - __flush_dcache_all(start, start + PAGE_SIZE); - if (mapping) + __flush_dcache_page(mapping, page); + if (mapping) { + unsigned long start = (unsigned long)page_address(page); flush_aliases(mapping, page); + flush_icache_range(start, start + PAGE_SIZE); + } set_bit(PG_dcache_clean, &page->flags); } } @@ -202,6 +218,7 @@ void update_mmu_cache(struct vm_area_struct *vma, { unsigned long pfn = pte_pfn(*pte); struct page *page; + struct address_space *mapping; if (!pfn_valid(pfn)) return; @@ -214,16 +231,15 @@ void update_mmu_cache(struct vm_area_struct *vma, if (page == ZERO_PAGE(0)) return; - if (!PageReserved(page) && - !test_and_set_bit(PG_dcache_clean, &page->flags)) { - unsigned long start = page_to_virt(page); - struct address_space *mapping; - - __flush_dcache(start, start + PAGE_SIZE); - - mapping = page_mapping(page); - if (mapping) - flush_aliases(mapping, page); + mapping = page_mapping(page); + if (!test_and_set_bit(PG_dcache_clean, &page->flags)) + __flush_dcache_page(mapping, page); + + if(mapping) + { + flush_aliases(mapping, page); + if (vma->vm_flags & VM_EXEC) + flush_icache_page(vma, page); } } @@ -231,15 +247,19 @@ void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *to) { __flush_dcache(vaddr, vaddr + PAGE_SIZE); + __flush_icache(vaddr, vaddr + PAGE_SIZE); copy_page(vto, vfrom); __flush_dcache((unsigned long)vto, (unsigned long)vto + PAGE_SIZE); + __flush_icache((unsigned long)vto, (unsigned long)vto + PAGE_SIZE); } void clear_user_page(void *addr, unsigned long vaddr, struct page *page) { __flush_dcache(vaddr, vaddr + PAGE_SIZE); + __flush_icache(vaddr, vaddr + PAGE_SIZE); clear_page(addr); __flush_dcache((unsigned long)addr, (unsigned long)addr + PAGE_SIZE); + __flush_icache((unsigned long)addr, (unsigned long)addr + PAGE_SIZE); } void copy_from_user_page(struct vm_area_struct *vma, struct page *page, @@ -248,7 +268,7 @@ void copy_from_user_page(struct vm_area_struct *vma, struct page *page, { flush_cache_page(vma, user_vaddr, page_to_pfn(page)); memcpy(dst, src, len); - __flush_dcache((unsigned long)src, (unsigned long)src + len); + __flush_dcache_all((unsigned long)src, (unsigned long)src + len); if (vma->vm_flags & VM_EXEC) __flush_icache((unsigned long)src, (unsigned long)src + len); } @@ -259,7 +279,7 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page, { flush_cache_page(vma, user_vaddr, page_to_pfn(page)); memcpy(dst, src, len); - __flush_dcache((unsigned long)dst, (unsigned long)dst + len); + __flush_dcache_all((unsigned long)dst, (unsigned long)dst + len); if (vma->vm_flags & VM_EXEC) __flush_icache((unsigned long)dst, (unsigned long)dst + len); } -- cgit v1.2.3