diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/armksyms.c | 1 | ||||
| -rw-r--r-- | arch/arm/kernel/entry-common.S | 3 | ||||
| -rw-r--r-- | arch/arm/kernel/signal.c | 25 | ||||
| -rw-r--r-- | arch/arm/kernel/vmlinux.lds.S | 6 | ||||
| -rw-r--r-- | arch/arm/lib/getuser.S | 11 | ||||
| -rw-r--r-- | arch/arm/mm/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mm/blockops.c | 185 | ||||
| -rw-r--r-- | arch/arm/mm/init.c | 24 | ||||
| -rw-r--r-- | arch/arm/mm/ioremap.c | 3 |
9 files changed, 33 insertions, 227 deletions
diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c index 7a3261f0bf7..9997098009a 100644 --- a/arch/arm/kernel/armksyms.c +++ b/arch/arm/kernel/armksyms.c @@ -120,7 +120,6 @@ EXPORT_SYMBOL(__arch_strncpy_from_user); EXPORT_SYMBOL(__get_user_1); EXPORT_SYMBOL(__get_user_2); EXPORT_SYMBOL(__get_user_4); -EXPORT_SYMBOL(__get_user_8); EXPORT_SYMBOL(__put_user_1); EXPORT_SYMBOL(__put_user_2); diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 066597f4345..f7f18307523 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -48,8 +48,7 @@ work_pending: mov r0, sp @ 'regs' mov r2, why @ 'syscall' bl do_notify_resume - disable_irq @ disable interrupts - b no_work_pending + b ret_slow_syscall @ Check work again work_resched: bl schedule diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index a917e3dd366..765922bcf9e 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -595,23 +595,22 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, */ ret |= !valid_user_regs(regs); - /* - * Block the signal if we were unsuccessful. - */ if (ret != 0) { - spin_lock_irq(&tsk->sighand->siglock); - sigorsets(&tsk->blocked, &tsk->blocked, - &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(&tsk->blocked, sig); - recalc_sigpending(); - spin_unlock_irq(&tsk->sighand->siglock); + force_sigsegv(sig, tsk); + return; } - if (ret == 0) - return; + /* + * Block the signal if we were successful. + */ + spin_lock_irq(&tsk->sighand->siglock); + sigorsets(&tsk->blocked, &tsk->blocked, + &ka->sa.sa_mask); + if (!(ka->sa.sa_flags & SA_NODEFER)) + sigaddset(&tsk->blocked, sig); + recalc_sigpending(); + spin_unlock_irq(&tsk->sighand->siglock); - force_sigsegv(sig, tsk); } /* diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index 80c8e4c8cef..9a47770114d 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -172,6 +172,10 @@ SECTIONS .comment 0 : { *(.comment) } } -/* those must never be empty */ +/* + * These must never be empty + * If you have to comment these two assert statements out, your + * binutils is too old (for other reasons as well) + */ ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") diff --git a/arch/arm/lib/getuser.S b/arch/arm/lib/getuser.S index d204018070a..c03ea8e666b 100644 --- a/arch/arm/lib/getuser.S +++ b/arch/arm/lib/getuser.S @@ -54,15 +54,6 @@ __get_user_4: mov r0, #0 mov pc, lr - .global __get_user_8 -__get_user_8: -5: ldrt r2, [r0], #4 -6: ldrt r3, [r0] - mov r0, #0 - mov pc, lr - -__get_user_bad_8: - mov r3, #0 __get_user_bad: mov r2, #0 mov r0, #-EFAULT @@ -73,6 +64,4 @@ __get_user_bad: .long 2b, __get_user_bad .long 3b, __get_user_bad .long 4b, __get_user_bad - .long 5b, __get_user_bad_8 - .long 6b, __get_user_bad_8 .previous diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile index 59f47d4c2df..ffe73ba2bf1 100644 --- a/arch/arm/mm/Makefile +++ b/arch/arm/mm/Makefile @@ -51,4 +51,4 @@ obj-$(CONFIG_CPU_ARM1026) += proc-arm1026.o obj-$(CONFIG_CPU_SA110) += proc-sa110.o obj-$(CONFIG_CPU_SA1100) += proc-sa1100.o obj-$(CONFIG_CPU_XSCALE) += proc-xscale.o -obj-$(CONFIG_CPU_V6) += proc-v6.o blockops.o +obj-$(CONFIG_CPU_V6) += proc-v6.o diff --git a/arch/arm/mm/blockops.c b/arch/arm/mm/blockops.c deleted file mode 100644 index 4f5ee2d0899..00000000000 --- a/arch/arm/mm/blockops.c +++ /dev/null @@ -1,185 +0,0 @@ -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/mm.h> - -#include <asm/memory.h> -#include <asm/ptrace.h> -#include <asm/cacheflush.h> -#include <asm/traps.h> - -extern struct cpu_cache_fns blk_cache_fns; - -#define HARVARD_CACHE - -/* - * blk_flush_kern_dcache_page(kaddr) - * - * Ensure that the data held in the page kaddr is written back - * to the page in question. - * - * - kaddr - kernel address (guaranteed to be page aligned) - */ -static void __attribute__((naked)) -blk_flush_kern_dcache_page(void *kaddr) -{ - asm( - "add r1, r0, %0 \n\ - sub r1, r1, %1 \n\ -1: .word 0xec401f0e @ mcrr p15, 0, r0, r1, c14, 0 @ blocking \n\ - mov r0, #0 \n\ - mcr p15, 0, r0, c7, c5, 0 \n\ - mcr p15, 0, r0, c7, c10, 4 \n\ - mov pc, lr" - : - : "I" (PAGE_SIZE), "I" (L1_CACHE_BYTES)); -} - -/* - * blk_dma_inv_range(start,end) - * - * Invalidate the data cache within the specified region; we will - * be performing a DMA operation in this region and we want to - * purge old data in the cache. - * - * - start - virtual start address of region - * - end - virtual end address of region - */ -static void __attribute__((naked)) -blk_dma_inv_range_unified(unsigned long start, unsigned long end) -{ - asm( - "tst r0, %0 \n\ - mcrne p15, 0, r0, c7, c11, 1 @ clean unified line \n\ - tst r1, %0 \n\ - mcrne p15, 0, r1, c7, c15, 1 @ clean & invalidate unified line\n\ - .word 0xec401f06 @ mcrr p15, 0, r1, r0, c6, 0 @ blocking \n\ - mov r0, #0 \n\ - mcr p15, 0, r0, c7, c10, 4 @ drain write buffer \n\ - mov pc, lr" - : - : "I" (L1_CACHE_BYTES - 1)); -} - -static void __attribute__((naked)) -blk_dma_inv_range_harvard(unsigned long start, unsigned long end) -{ - asm( - "tst r0, %0 \n\ - mcrne p15, 0, r0, c7, c10, 1 @ clean D line \n\ - tst r1, %0 \n\ - mcrne p15, 0, r1, c7, c14, 1 @ clean & invalidate D line \n\ - .word 0xec401f06 @ mcrr p15, 0, r1, r0, c6, 0 @ blocking \n\ - mov r0, #0 \n\ - mcr p15, 0, r0, c7, c10, 4 @ drain write buffer \n\ - mov pc, lr" - : - : "I" (L1_CACHE_BYTES - 1)); -} - -/* - * blk_dma_clean_range(start,end) - * - start - virtual start address of region - * - end - virtual end address of region - */ -static void __attribute__((naked)) -blk_dma_clean_range(unsigned long start, unsigned long end) -{ - asm( - ".word 0xec401f0c @ mcrr p15, 0, r1, r0, c12, 0 @ blocking \n\ - mov r0, #0 \n\ - mcr p15, 0, r0, c7, c10, 4 @ drain write buffer \n\ - mov pc, lr"); -} - -/* - * blk_dma_flush_range(start,end) - * - start - virtual start address of region - * - end - virtual end address of region - */ -static void __attribute__((naked)) -blk_dma_flush_range(unsigned long start, unsigned long end) -{ - asm( - ".word 0xec401f0e @ mcrr p15, 0, r1, r0, c14, 0 @ blocking \n\ - mov pc, lr"); -} - -static int blockops_trap(struct pt_regs *regs, unsigned int instr) -{ - regs->ARM_r4 |= regs->ARM_r2; - regs->ARM_pc += 4; - return 0; -} - -static char *func[] = { - "Prefetch data range", - "Clean+Invalidate data range", - "Clean data range", - "Invalidate data range", - "Invalidate instr range" -}; - -static struct undef_hook blockops_hook __initdata = { - .instr_mask = 0x0fffffd0, - .instr_val = 0x0c401f00, - .cpsr_mask = PSR_T_BIT, - .cpsr_val = 0, - .fn = blockops_trap, -}; - -static int __init blockops_check(void) -{ - register unsigned int err asm("r4") = 0; - unsigned int err_pos = 1; - unsigned int cache_type; - int i; - - asm("mrc p15, 0, %0, c0, c0, 1" : "=r" (cache_type)); - - printk("Checking V6 block cache operations:\n"); - register_undef_hook(&blockops_hook); - - __asm__ ("mov r0, %0\n\t" - "mov r1, %1\n\t" - "mov r2, #1\n\t" - ".word 0xec401f2c @ mcrr p15, 0, r1, r0, c12, 2\n\t" - "mov r2, #2\n\t" - ".word 0xec401f0e @ mcrr p15, 0, r1, r0, c14, 0\n\t" - "mov r2, #4\n\t" - ".word 0xec401f0c @ mcrr p15, 0, r1, r0, c12, 0\n\t" - "mov r2, #8\n\t" - ".word 0xec401f06 @ mcrr p15, 0, r1, r0, c6, 0\n\t" - "mov r2, #16\n\t" - ".word 0xec401f05 @ mcrr p15, 0, r1, r0, c5, 0\n\t" - : - : "r" (PAGE_OFFSET), "r" (PAGE_OFFSET + 128) - : "r0", "r1", "r2"); - - unregister_undef_hook(&blockops_hook); - - for (i = 0; i < ARRAY_SIZE(func); i++, err_pos <<= 1) - printk("%30s: %ssupported\n", func[i], err & err_pos ? "not " : ""); - - if ((err & 8) == 0) { - printk(" --> Using %s block cache invalidate\n", - cache_type & (1 << 24) ? "harvard" : "unified"); - if (cache_type & (1 << 24)) - cpu_cache.dma_inv_range = blk_dma_inv_range_harvard; - else - cpu_cache.dma_inv_range = blk_dma_inv_range_unified; - } - if ((err & 4) == 0) { - printk(" --> Using block cache clean\n"); - cpu_cache.dma_clean_range = blk_dma_clean_range; - } - if ((err & 2) == 0) { - printk(" --> Using block cache clean+invalidate\n"); - cpu_cache.dma_flush_range = blk_dma_flush_range; - cpu_cache.flush_kern_dcache_page = blk_flush_kern_dcache_page; - } - - return 0; -} - -__initcall(blockops_check); diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index c168f322ef8..8b276ee38ac 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -420,7 +420,8 @@ static void __init bootmem_init(struct meminfo *mi) * Set up device the mappings. Since we clear out the page tables for all * mappings above VMALLOC_END, we will remove any debug device mappings. * This means you have to be careful how you debug this function, or any - * called function. (Do it by code inspection!) + * called function. This means you can't use any function or debugging + * method which may touch any device, otherwise the kernel _will_ crash. */ static void __init devicemaps_init(struct machine_desc *mdesc) { @@ -428,6 +429,12 @@ static void __init devicemaps_init(struct machine_desc *mdesc) unsigned long addr; void *vectors; + /* + * Allocate the vector page early. + */ + vectors = alloc_bootmem_low_pages(PAGE_SIZE); + BUG_ON(!vectors); + for (addr = VMALLOC_END; addr; addr += PGDIR_SIZE) pmd_clear(pmd_off_k(addr)); @@ -461,12 +468,6 @@ static void __init devicemaps_init(struct machine_desc *mdesc) create_mapping(&map); #endif - flush_cache_all(); - local_flush_tlb_all(); - - vectors = alloc_bootmem_low_pages(PAGE_SIZE); - BUG_ON(!vectors); - /* * Create a mapping for the machine vectors at the high-vectors * location (0xffff0000). If we aren't using high-vectors, also @@ -491,12 +492,13 @@ static void __init devicemaps_init(struct machine_desc *mdesc) mdesc->map_io(); /* - * Finally flush the tlb again - this ensures that we're in a - * consistent state wrt the writebuffer if the writebuffer needs - * draining. After this point, we can start to touch devices - * again. + * Finally flush the caches and tlb to ensure that we're in a + * consistent state wrt the writebuffer. This also ensures that + * any write-allocated cache lines in the vector page are written + * back. After this point, we can start to touch devices again. */ local_flush_tlb_all(); + flush_cache_all(); } /* diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c index 0f128c28fee..10901398e4a 100644 --- a/arch/arm/mm/ioremap.c +++ b/arch/arm/mm/ioremap.c @@ -130,8 +130,7 @@ remap_area_pages(unsigned long start, unsigned long phys_addr, * mapping. See include/asm-arm/proc-armv/pgtable.h for more information. */ void __iomem * -__ioremap(unsigned long phys_addr, size_t size, unsigned long flags, - unsigned long align) +__ioremap(unsigned long phys_addr, size_t size, unsigned long flags) { void * addr; struct vm_struct * area; |