diff options
author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2009-06-11 15:35:00 +0100 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-06-11 15:35:00 +0100 |
commit | 42578c82e0f1810a07ebe29cb05e874893243d8c (patch) | |
tree | e2a3811677d3594e891fc82c940438f6b6abc3e0 /arch/arm/kernel | |
parent | 2631182bf93919577730e6a6c4345308db590057 (diff) | |
parent | 85d6943af50537d3aec58b967ffbd3fec88453e9 (diff) |
Merge branch 'for-rmk' of git://linux-arm.org/linux-2.6 into devel
Conflicts:
arch/arm/Kconfig
arch/arm/kernel/smp.c
arch/arm/mach-realview/Makefile
arch/arm/mach-realview/platsmp.c
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r-- | arch/arm/kernel/entry-armv.S | 3 | ||||
-rw-r--r-- | arch/arm/kernel/entry-common.S | 3 | ||||
-rw-r--r-- | arch/arm/kernel/process.c | 2 | ||||
-rw-r--r-- | arch/arm/kernel/signal.c | 8 | ||||
-rw-r--r-- | arch/arm/kernel/smp.c | 69 | ||||
-rw-r--r-- | arch/arm/kernel/vmlinux.lds.S | 2 |
6 files changed, 58 insertions, 29 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 83b1da6b7baa..fc8af43c5000 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -482,6 +482,9 @@ __und_usr: subeq r4, r2, #4 @ ARM instr at LR - 4 subne r4, r2, #2 @ Thumb instr at LR - 2 1: ldreqt r0, [r4] +#ifdef CONFIG_CPU_ENDIAN_BE8 + reveq r0, r0 @ little endian instruction +#endif beq call_fpe @ Thumb instruction #if __LINUX_ARM_ARCH__ >= 7 diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index b55cb0331809..366e5097a41a 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -210,6 +210,9 @@ ENTRY(vector_swi) A710( teq ip, #0x0f000000 ) A710( bne .Larm710bug ) #endif +#ifdef CONFIG_CPU_ENDIAN_BE8 + rev r10, r10 @ little endian instruction +#endif #elif defined(CONFIG_AEABI) diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index c3265a2e7cd4..1585423699ee 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -365,7 +365,7 @@ pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) regs.ARM_r2 = (unsigned long)fn; regs.ARM_r3 = (unsigned long)do_exit; regs.ARM_pc = (unsigned long)kernel_thread_helper; - regs.ARM_cpsr = SVC_MODE; + regs.ARM_cpsr = SVC_MODE | PSR_ENDSTATE; return do_fork(flags|CLONE_VM|CLONE_UNTRACED, 0, ®s, 0, NULL, NULL); } diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index 80b8b5c7e07a..442b87476f97 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -426,9 +426,13 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka, */ thumb = handler & 1; - if (thumb) + if (thumb) { cpsr |= PSR_T_BIT; - else +#if __LINUX_ARM_ARCH__ >= 7 + /* clear the If-Then Thumb-2 execution state */ + cpsr &= ~PSR_IT_MASK; +#endif + } else cpsr &= ~PSR_T_BIT; } #endif diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 0d8097fa4ca5..de885fd256c5 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -28,6 +28,7 @@ #include <asm/atomic.h> #include <asm/cacheflush.h> #include <asm/cpu.h> +#include <asm/cputype.h> #include <asm/mmu_context.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> @@ -585,6 +586,12 @@ struct tlb_args { unsigned long ta_end; }; +/* all SMP configurations have the extended CPUID registers */ +static inline int tlb_ops_need_broadcast(void) +{ + return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2; +} + static inline void ipi_flush_tlb_all(void *ignored) { local_flush_tlb_all(); @@ -627,51 +634,61 @@ static inline void ipi_flush_tlb_kernel_range(void *arg) void flush_tlb_all(void) { - on_each_cpu(ipi_flush_tlb_all, NULL, 1); + if (tlb_ops_need_broadcast()) + on_each_cpu(ipi_flush_tlb_all, NULL, 1); + else + local_flush_tlb_all(); } void flush_tlb_mm(struct mm_struct *mm) { - on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, &mm->cpu_vm_mask); + if (tlb_ops_need_broadcast()) + on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, &mm->cpu_vm_mask); + else + local_flush_tlb_mm(mm); } void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) { - struct tlb_args ta; - - ta.ta_vma = vma; - ta.ta_start = uaddr; - - on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, &vma->vm_mm->cpu_vm_mask); + if (tlb_ops_need_broadcast()) { + struct tlb_args ta; + ta.ta_vma = vma; + ta.ta_start = uaddr; + on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, &vma->vm_mm->cpu_vm_mask); + } else + local_flush_tlb_page(vma, uaddr); } void flush_tlb_kernel_page(unsigned long kaddr) { - struct tlb_args ta; - - ta.ta_start = kaddr; - - on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1); + if (tlb_ops_need_broadcast()) { + struct tlb_args ta; + ta.ta_start = kaddr; + on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1); + } else + local_flush_tlb_kernel_page(kaddr); } void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { - struct tlb_args ta; - - ta.ta_vma = vma; - ta.ta_start = start; - ta.ta_end = end; - - on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, &vma->vm_mm->cpu_vm_mask); + if (tlb_ops_need_broadcast()) { + struct tlb_args ta; + ta.ta_vma = vma; + ta.ta_start = start; + ta.ta_end = end; + on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, &vma->vm_mm->cpu_vm_mask); + } else + local_flush_tlb_range(vma, start, end); } void flush_tlb_kernel_range(unsigned long start, unsigned long end) { - struct tlb_args ta; - - ta.ta_start = start; - ta.ta_end = end; - - on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1); + if (tlb_ops_need_broadcast()) { + struct tlb_args ta; + ta.ta_start = start; + ta.ta_end = end; + on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1); + } else + local_flush_tlb_kernel_range(start, end); } diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index c90f27250ead..6c0779792546 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -141,6 +141,7 @@ SECTIONS .data : AT(__data_loc) { _data = .; /* address in memory */ + _sdata = .; /* * first, the init task union, aligned @@ -192,6 +193,7 @@ SECTIONS __bss_start = .; /* BSS */ *(.bss) *(COMMON) + __bss_stop = .; _end = .; } /* Stabs debugging sections. */ |