aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kernel/entry-common.S3
-rw-r--r--arch/arm/kernel/signal.c25
-rw-r--r--arch/arm/mm/Makefile2
-rw-r--r--arch/arm/mm/blockops.c185
4 files changed, 14 insertions, 201 deletions
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/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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 21:47:33 +0000