diff options
Diffstat (limited to 'arch/sh/kernel')
28 files changed, 744 insertions, 242 deletions
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile index a2d0a40f384..097ae5ceb0e 100644 --- a/arch/sh/kernel/Makefile +++ b/arch/sh/kernel/Makefile @@ -9,8 +9,12 @@ ifdef CONFIG_FUNCTION_TRACER CFLAGS_REMOVE_ftrace.o = -pg endif -obj-y := debugtraps.o dumpstack.o idle.o io.o io_generic.o irq.o \ - machvec.o nmi_debug.o process_$(BITS).o ptrace_$(BITS).o \ +CFLAGS_REMOVE_return_address.o = -pg + +obj-y := debugtraps.o dma-nommu.o dumpstack.o \ + idle.o io.o io_generic.o irq.o \ + irq_$(BITS).o machvec.o nmi_debug.o process_$(BITS).o \ + ptrace_$(BITS).o return_address.o \ setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o \ syscalls_$(BITS).o time.o topology.o traps.o \ traps_$(BITS).o unwinder.o diff --git a/arch/sh/kernel/cpu/Makefile b/arch/sh/kernel/cpu/Makefile index 3d6b9312dc4..d97c803719e 100644 --- a/arch/sh/kernel/cpu/Makefile +++ b/arch/sh/kernel/cpu/Makefile @@ -15,7 +15,6 @@ obj-$(CONFIG_ARCH_SHMOBILE) += shmobile/ # Common interfaces. -obj-$(CONFIG_UBC_WAKEUP) += ubc.o obj-$(CONFIG_SH_ADC) += adc.o obj-$(CONFIG_SH_CLK_CPG) += clock-cpg.o diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c index e932ebef473..580d58b94cc 100644 --- a/arch/sh/kernel/cpu/init.c +++ b/arch/sh/kernel/cpu/init.c @@ -338,17 +338,6 @@ asmlinkage void __init sh_cpu_init(void) } #endif - /* - * Some brain-damaged loaders decided it would be a good idea to put - * the UBC to sleep. This causes some issues when it comes to things - * like PTRACE_SINGLESTEP or doing hardware watchpoints in GDB. So .. - * we wake it up and hope that all is well. - */ -#ifdef CONFIG_SUPERH32 - if (raw_smp_processor_id() == 0) - ubc_wakeup(); -#endif - speculative_execution_init(); expmask_init(); } diff --git a/arch/sh/kernel/cpu/sh3/entry.S b/arch/sh/kernel/cpu/sh3/entry.S index bb407ef0b91..3f7e2a22c7c 100644 --- a/arch/sh/kernel/cpu/sh3/entry.S +++ b/arch/sh/kernel/cpu/sh3/entry.S @@ -297,41 +297,8 @@ ENTRY(vbr_base) ! .balign 256,0,256 general_exception: -#ifndef CONFIG_CPU_SUBTYPE_SHX3 bra handle_exception sts pr, k3 ! save original pr value in k3 -#else - mov.l 1f, k4 - mov.l @k4, k4 - - ! Is EXPEVT larger than 0x800? - mov #0x8, k0 - shll8 k0 - cmp/hs k0, k4 - bf 0f - - ! then add 0x580 (k2 is 0xd80 or 0xda0) - mov #0x58, k0 - shll2 k0 - shll2 k0 - add k0, k4 -0: - ! Setup stack and save DSP context (k0 contains original r15 on return) - bsr prepare_stack - nop - - ! Save registers / Switch to bank 0 - mov k4, k2 ! keep vector in k2 - mov.l 1f, k4 ! SR bits to clear in k4 - bsr save_regs ! needs original pr value in k3 - nop - - bra handle_exception_special - nop - - .align 2 -1: .long EXPEVT -#endif ! prepare_stack() ! - roll back gRB diff --git a/arch/sh/kernel/cpu/sh4a/setup-shx3.c b/arch/sh/kernel/cpu/sh4a/setup-shx3.c index e848443deeb..c7ba9166e18 100644 --- a/arch/sh/kernel/cpu/sh4a/setup-shx3.c +++ b/arch/sh/kernel/cpu/sh4a/setup-shx3.c @@ -15,6 +15,15 @@ #include <linux/sh_timer.h> #include <asm/mmzone.h> +/* + * This intentionally only registers SCIF ports 0, 1, and 3. SCIF 2 + * INTEVT values overlap with the FPU EXPEVT ones, requiring special + * demuxing in the exception dispatch path. + * + * As this overlap is something that never should have made it in to + * silicon in the first place, we just refuse to deal with the port at + * all rather than adding infrastructure to hack around it. + */ static struct plat_sci_port sci_platform_data[] = { { .mapbase = 0xffc30000, @@ -27,11 +36,6 @@ static struct plat_sci_port sci_platform_data[] = { .type = PORT_SCIF, .irqs = { 44, 45, 47, 46 }, }, { - .mapbase = 0xffc50000, - .flags = UPF_BOOT_AUTOCONF, - .type = PORT_SCIF, - .irqs = { 48, 49, 51, 50 }, - }, { .mapbase = 0xffc60000, .flags = UPF_BOOT_AUTOCONF, .type = PORT_SCIF, @@ -268,7 +272,11 @@ enum { UNUSED = 0, /* interrupt sources */ - IRL, IRQ0, IRQ1, IRQ2, IRQ3, + IRL_LLLL, IRL_LLLH, IRL_LLHL, IRL_LLHH, + IRL_LHLL, IRL_LHLH, IRL_LHHL, IRL_LHHH, + IRL_HLLL, IRL_HLLH, IRL_HLHL, IRL_HLHH, + IRL_HHLL, IRL_HHLH, IRL_HHHL, + IRQ0, IRQ1, IRQ2, IRQ3, HUDII, TMU0, TMU1, TMU2, TMU3, TMU4, TMU5, PCII0, PCII1, PCII2, PCII3, PCII4, @@ -291,7 +299,7 @@ enum { INTICI4, INTICI5, INTICI6, INTICI7, /* interrupt groups */ - PCII56789, SCIF0, SCIF1, SCIF2, SCIF3, + IRL, PCII56789, SCIF0, SCIF1, SCIF2, SCIF3, DMAC0, DMAC1, }; @@ -309,8 +317,6 @@ static struct intc_vect vectors[] __initdata = { INTC_VECT(SCIF0_BRI, 0x740), INTC_VECT(SCIF0_TXI, 0x760), INTC_VECT(SCIF1_ERI, 0x780), INTC_VECT(SCIF1_RXI, 0x7a0), INTC_VECT(SCIF1_BRI, 0x7c0), INTC_VECT(SCIF1_TXI, 0x7e0), - INTC_VECT(SCIF2_ERI, 0x800), INTC_VECT(SCIF2_RXI, 0x820), - INTC_VECT(SCIF2_BRI, 0x840), INTC_VECT(SCIF2_TXI, 0x860), INTC_VECT(SCIF3_ERI, 0x880), INTC_VECT(SCIF3_RXI, 0x8a0), INTC_VECT(SCIF3_BRI, 0x8c0), INTC_VECT(SCIF3_TXI, 0x8e0), INTC_VECT(DMAC0_DMINT0, 0x900), INTC_VECT(DMAC0_DMINT1, 0x920), @@ -344,10 +350,13 @@ static struct intc_vect vectors[] __initdata = { }; static struct intc_group groups[] __initdata = { + INTC_GROUP(IRL, IRL_LLLL, IRL_LLLH, IRL_LLHL, IRL_LLHH, + IRL_LHLL, IRL_LHLH, IRL_LHHL, IRL_LHHH, + IRL_HLLL, IRL_HLLH, IRL_HLHL, IRL_HLHH, + IRL_HHLL, IRL_HHLH, IRL_HHHL), INTC_GROUP(PCII56789, PCII5, PCII6, PCII7, PCII8, PCII9), INTC_GROUP(SCIF0, SCIF0_ERI, SCIF0_RXI, SCIF0_BRI, SCIF0_TXI), INTC_GROUP(SCIF1, SCIF1_ERI, SCIF1_RXI, SCIF1_BRI, SCIF1_TXI), - INTC_GROUP(SCIF2, SCIF2_ERI, SCIF2_RXI, SCIF2_BRI, SCIF2_TXI), INTC_GROUP(SCIF3, SCIF3_ERI, SCIF3_RXI, SCIF3_BRI, SCIF3_TXI), INTC_GROUP(DMAC0, DMAC0_DMINT0, DMAC0_DMINT1, DMAC0_DMINT2, DMAC0_DMINT3, DMAC0_DMINT4, DMAC0_DMINT5, DMAC0_DMAE), @@ -419,14 +428,14 @@ static DECLARE_INTC_DESC(intc_desc_irq, "shx3-irq", vectors_irq, groups, /* External interrupt pins in IRL mode */ static struct intc_vect vectors_irl[] __initdata = { - INTC_VECT(IRL, 0x200), INTC_VECT(IRL, 0x220), - INTC_VECT(IRL, 0x240), INTC_VECT(IRL, 0x260), - INTC_VECT(IRL, 0x280), INTC_VECT(IRL, 0x2a0), - INTC_VECT(IRL, 0x2c0), INTC_VECT(IRL, 0x2e0), - INTC_VECT(IRL, 0x300), INTC_VECT(IRL, 0x320), - INTC_VECT(IRL, 0x340), INTC_VECT(IRL, 0x360), - INTC_VECT(IRL, 0x380), INTC_VECT(IRL, 0x3a0), - INTC_VECT(IRL, 0x3c0), + INTC_VECT(IRL_LLLL, 0x200), INTC_VECT(IRL_LLLH, 0x220), + INTC_VECT(IRL_LLHL, 0x240), INTC_VECT(IRL_LLHH, 0x260), + INTC_VECT(IRL_LHLL, 0x280), INTC_VECT(IRL_LHLH, 0x2a0), + INTC_VECT(IRL_LHHL, 0x2c0), INTC_VECT(IRL_LHHH, 0x2e0), + INTC_VECT(IRL_HLLL, 0x300), INTC_VECT(IRL_HLLH, 0x320), + INTC_VECT(IRL_HLHL, 0x340), INTC_VECT(IRL_HLHH, 0x360), + INTC_VECT(IRL_HHLL, 0x380), INTC_VECT(IRL_HHLH, 0x3a0), + INTC_VECT(IRL_HHHL, 0x3c0), }; static DECLARE_INTC_DESC(intc_desc_irl, "shx3-irl", vectors_irl, groups, diff --git a/arch/sh/kernel/cpu/sh4a/smp-shx3.c b/arch/sh/kernel/cpu/sh4a/smp-shx3.c index 185ec3976a2..5863e0c4d02 100644 --- a/arch/sh/kernel/cpu/sh4a/smp-shx3.c +++ b/arch/sh/kernel/cpu/sh4a/smp-shx3.c @@ -14,6 +14,13 @@ #include <linux/interrupt.h> #include <linux/io.h> +#define STBCR_REG(phys_id) (0xfe400004 | (phys_id << 12)) +#define RESET_REG(phys_id) (0xfe400008 | (phys_id << 12)) + +#define STBCR_MSTP 0x00000001 +#define STBCR_RESET 0x00000002 +#define STBCR_LTSLP 0x80000000 + static irqreturn_t ipi_interrupt_handler(int irq, void *arg) { unsigned int message = (unsigned int)(long)arg; @@ -21,9 +28,9 @@ static irqreturn_t ipi_interrupt_handler(int irq, void *arg) unsigned int offs = 4 * cpu; unsigned int x; - x = ctrl_inl(0xfe410070 + offs); /* C0INITICI..CnINTICI */ + x = __raw_readl(0xfe410070 + offs); /* C0INITICI..CnINTICI */ x &= (1 << (message << 2)); - ctrl_outl(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */ + __raw_writel(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */ smp_message_recv(message); @@ -37,6 +44,9 @@ void __init plat_smp_setup(void) init_cpu_possible(cpumask_of(cpu)); + /* Enable light sleep for the boot CPU */ + __raw_writel(__raw_readl(STBCR_REG(cpu)) | STBCR_LTSLP, STBCR_REG(cpu)); + __cpu_number_map[0] = 0; __cpu_logical_map[0] = 0; @@ -66,32 +76,23 @@ void __init plat_prepare_cpus(unsigned int max_cpus) "IPI", (void *)(long)i); } -#define STBCR_REG(phys_id) (0xfe400004 | (phys_id << 12)) -#define RESET_REG(phys_id) (0xfe400008 | (phys_id << 12)) - -#define STBCR_MSTP 0x00000001 -#define STBCR_RESET 0x00000002 -#define STBCR_LTSLP 0x80000000 - -#define STBCR_AP_VAL (STBCR_RESET | STBCR_LTSLP) - void plat_start_cpu(unsigned int cpu, unsigned long entry_point) { - ctrl_outl(entry_point, RESET_REG(cpu)); + __raw_writel(entry_point, RESET_REG(cpu)); - if (!(ctrl_inl(STBCR_REG(cpu)) & STBCR_MSTP)) - ctrl_outl(STBCR_MSTP, STBCR_REG(cpu)); + if (!(__raw_readl(STBCR_REG(cpu)) & STBCR_MSTP)) + __raw_writel(STBCR_MSTP, STBCR_REG(cpu)); - while (!(ctrl_inl(STBCR_REG(cpu)) & STBCR_MSTP)) + while (!(__raw_readl(STBCR_REG(cpu)) & STBCR_MSTP)) cpu_relax(); /* Start up secondary processor by sending a reset */ - ctrl_outl(STBCR_AP_VAL, STBCR_REG(cpu)); + __raw_writel(STBCR_RESET | STBCR_LTSLP, STBCR_REG(cpu)); } int plat_smp_processor_id(void) { - return ctrl_inl(0xff000048); /* CPIDR */ + return __raw_readl(0xff000048); /* CPIDR */ } void plat_send_ipi(unsigned int cpu, unsigned int message) @@ -100,5 +101,5 @@ void plat_send_ipi(unsigned int cpu, unsigned int message) BUG_ON(cpu >= 4); - ctrl_outl(1 << (message << 2), addr); /* C0INTICI..CnINTICI */ + __raw_writel(1 << (message << 2), addr); /* C0INTICI..CnINTICI */ } diff --git a/arch/sh/kernel/cpu/sh5/entry.S b/arch/sh/kernel/cpu/sh5/entry.S index b0aacf67525..8f13f73cb2c 100644 --- a/arch/sh/kernel/cpu/sh5/entry.S +++ b/arch/sh/kernel/cpu/sh5/entry.S @@ -933,7 +933,7 @@ ret_with_reschedule: pta restore_all, tr1 - movi (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), r8 + movi _TIF_SIGPENDING, r8 and r8, r7, r8 pta work_notifysig, tr0 bne r8, ZERO, tr0 diff --git a/arch/sh/kernel/cpu/ubc.S b/arch/sh/kernel/cpu/ubc.S deleted file mode 100644 index 81923079fa1..00000000000 --- a/arch/sh/kernel/cpu/ubc.S +++ /dev/null @@ -1,59 +0,0 @@ -/* - * arch/sh/kernel/cpu/ubc.S - * - * Set of management routines for the User Break Controller (UBC) - * - * Copyright (C) 2002 Paul Mundt - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ -#include <linux/linkage.h> -#include <asm/ubc.h> - -#define STBCR2 0xffc00010 - -ENTRY(ubc_sleep) - mov #0, r0 - - mov.l 1f, r1 ! Zero out UBC_BBRA .. - mov.w r0, @r1 - - mov.l 2f, r1 ! .. same for BBRB .. - mov.w r0, @r1 - - mov.l 3f, r1 ! .. and again for BRCR. - mov.w r0, @r1 - - mov.w @r1, r0 ! Dummy read BRCR - - mov.l 4f, r1 ! Set MSTP5 in STBCR2 - mov.b @r1, r0 - or #0x01, r0 - mov.b r0, @r1 - - mov.b @r1, r0 ! Two dummy reads .. - mov.b @r1, r0 - - rts - nop - -ENTRY(ubc_wakeup) - mov.l 4f, r1 ! Clear MSTP5 - mov.b @r1, r0 - and #0xfe, r0 - mov.b r0, @r1 - - mov.b @r1, r0 ! Two more dummy reads .. - mov.b @r1, r0 - - rts - nop - -1: .long UBC_BBRA -2: .long UBC_BBRB -3: .long UBC_BRCR -4: .long STBCR2 - diff --git a/arch/sh/kernel/dma-nommu.c b/arch/sh/kernel/dma-nommu.c new file mode 100644 index 00000000000..b336fcf40f1 --- /dev/null +++ b/arch/sh/kernel/dma-nommu.c @@ -0,0 +1,78 @@ +/* + * DMA mapping support for platforms lacking IOMMUs. + * + * Copyright (C) 2009 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/dma-mapping.h> +#include <linux/io.h> + +static dma_addr_t nommu_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + dma_addr_t addr = page_to_phys(page) + offset; + + WARN_ON(size == 0); + dma_cache_sync(dev, page_address(page) + offset, size, dir); + + return addr; +} + +static int nommu_map_sg(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + struct scatterlist *s; + int i; + + WARN_ON(nents == 0 || sg[0].length == 0); + + for_each_sg(sg, s, nents, i) { + BUG_ON(!sg_page(s)); + + dma_cache_sync(dev, sg_virt(s), s->length, dir); + + s->dma_address = sg_phys(s); + s->dma_length = s->length; + } + + return nents; +} + +static void nommu_sync_single(struct device *dev, dma_addr_t addr, + size_t size, enum dma_data_direction dir) +{ + dma_cache_sync(dev, phys_to_virt(addr), size, dir); +} + +static void nommu_sync_sg(struct device *dev, struct scatterlist *sg, + int nelems, enum dma_data_direction dir) +{ + struct scatterlist *s; + int i; + + for_each_sg(sg, s, nelems, i) + dma_cache_sync(dev, sg_virt(s), s->length, dir); +} + +struct dma_map_ops nommu_dma_ops = { + .alloc_coherent = dma_generic_alloc_coherent, + .free_coherent = dma_generic_free_coherent, + .map_page = nommu_map_page, + .map_sg = nommu_map_sg, + .sync_single_for_device = nommu_sync_single, + .sync_sg_for_device = nommu_sync_sg, + .is_phys = 1, +}; + +void __init no_iommu_init(void) +{ + if (dma_ops) + return; + dma_ops = &nommu_dma_ops; +} diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c index 2d07084e488..6c9d0c10f2b 100644 --- a/arch/sh/kernel/dwarf.c +++ b/arch/sh/kernel/dwarf.c @@ -20,6 +20,7 @@ #include <linux/list.h> #include <linux/mempool.h> #include <linux/mm.h> +#include <linux/elf.h> #include <linux/ftrace.h> #include <asm/dwarf.h> #include <asm/unwinder.h> @@ -530,7 +531,18 @@ static int dwarf_cfa_execute_insns(unsigned char *insn_start, } /** - * dwarf_unwind_stack - recursively unwind the stack + * dwarf_free_frame - free the memory allocated for @frame + * @frame: the frame to free + */ +void dwarf_free_frame(struct dwarf_frame *frame) +{ + dwarf_frame_free_regs(frame); + mempool_free(frame, dwarf_frame_pool); +} + +/** + * dwarf_unwind_stack - unwind the stack + * * @pc: address of the function to unwind * @prev: struct dwarf_frame of the previous stackframe on the callstack * @@ -548,9 +560,9 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc, unsigned long addr; /* - * If this is the first invocation of this recursive function we - * need get the contents of a physical register to get the CFA - * in order to begin the virtual unwinding of the stack. + * If we're starting at the top of the stack we need get the + * contents of a physical register to get the CFA in order to + * begin the virtual unwinding of the stack. * * NOTE: the return address is guaranteed to be setup by the * time this function makes its first function call. @@ -593,9 +605,8 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc, fde = dwarf_lookup_fde(pc); if (!fde) { /* - * This is our normal exit path - the one that stops the - * recursion. There's two reasons why we might exit - * here, + * This is our normal exit path. There are two reasons + * why we might exit here, * * a) pc has no asscociated DWARF frame info and so * we don't know how to unwind this frame. This is @@ -637,10 +648,10 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc, } else { /* - * Again, this is the first invocation of this - * recurisve function. We need to physically - * read the contents of a register in order to - * get the Canonical Frame Address for this + * Again, we're starting from the top of the + * stack. We need to physically read + * the contents of a register in order to get + * the Canonical Frame Address for this * function. */ frame->cfa = dwarf_read_arch_reg(frame->cfa_register); @@ -670,13 +681,12 @@ struct dwarf_frame * dwarf_unwind_stack(unsigned long pc, return frame; bail: - dwarf_frame_free_regs(frame); - mempool_free(frame, dwarf_frame_pool); + dwarf_free_frame(frame); return NULL; } static int dwarf_parse_cie(void *entry, void *p, unsigned long len, - unsigned char *end) + unsigned char *end, struct module *mod) { struct dwarf_cie *cie; unsigned long flags; @@ -772,6 +782,8 @@ static int dwarf_parse_cie(void *entry, void *p, unsigned long len, cie->initial_instructions = p; cie->instructions_end = end; + cie->mod = mod; + /* Add to list */ spin_lock_irqsave(&dwarf_cie_lock, flags); list_add_tail(&cie->link, &dwarf_cie_list); @@ -782,7 +794,7 @@ static int dwarf_parse_cie(void *entry, void *p, unsigned long len, static int dwarf_parse_fde(void *entry, u32 entry_type, void *start, unsigned long len, - unsigned char *end) + unsigned char *end, struct module *mod) { struct dwarf_fde *fde; struct dwarf_cie *cie; @@ -831,6 +843,8 @@ static int dwarf_parse_fde(void *entry, u32 entry_type, fde->instructions = p; fde->end = end; + fde->mod = mod; + /* Add to list. */ spin_lock_irqsave(&dwarf_fde_lock, flags); list_add_tail(&fde->link, &dwarf_fde_list); @@ -854,10 +868,8 @@ static void dwarf_unwinder_dump(struct task_struct *task, while (1) { frame = dwarf_unwind_stack(return_addr, _frame); - if (_frame) { - dwarf_frame_free_regs(_frame); - mempool_free(_frame, dwarf_frame_pool); - } + if (_frame) + dwarf_free_frame(_frame); _frame = frame; @@ -867,6 +879,9 @@ static void dwarf_unwinder_dump(struct task_struct *task, return_addr = frame->return_addr; ops->address(data, return_addr, 1); } + + if (frame) + dwarf_free_frame(frame); } static struct unwinder dwarf_unwinder = { @@ -896,48 +911,28 @@ static void dwarf_unwinder_cleanup(void) } /** - * dwarf_unwinder_init - initialise the dwarf unwinder + * dwarf_parse_section - parse DWARF section + * @eh_frame_start: start address of the .eh_frame section + * @eh_frame_end: end address of the .eh_frame section + * @mod: the kernel module containing the .eh_frame section * - * Build the data structures describing the .dwarf_frame section to - * make it easier to lookup CIE and FDE entries. Because the - * .eh_frame section is packed as tightly as possible it is not - * easy to lookup the FDE for a given PC, so we build a list of FDE - * and CIE entries that make it easier. + * Parse the information in a .eh_frame section. */ -static int __init dwarf_unwinder_init(void) +static int dwarf_parse_section(char *eh_frame_start, char *eh_frame_end, + struct module *mod) { u32 entry_type; void *p, *entry; int count, err = 0; - unsigned long len; + unsigned long len = 0; unsigned int c_entries, f_entries; unsigned char *end; - INIT_LIST_HEAD(&dwarf_cie_list); - INIT_LIST_HEAD(&dwarf_fde_list); c_entries = 0; f_entries = 0; - entry = &__start_eh_frame; - - dwarf_frame_cachep = kmem_cache_create("dwarf_frames", - sizeof(struct dwarf_frame), 0, - SLAB_PANIC | SLAB_HWCACHE_ALIGN | SLAB_NOTRACK, NULL); - - dwarf_reg_cachep = kmem_cache_create("dwarf_regs", - sizeof(struct dwarf_reg), 0, - SLAB_PANIC | SLAB_HWCACHE_ALIGN | SLAB_NOTRACK, NULL); + entry = eh_frame_start; - dwarf_frame_pool = mempool_create(DWARF_FRAME_MIN_REQ, - mempool_alloc_slab, - mempool_free_slab, - dwarf_frame_cachep); - - dwarf_reg_pool = mempool_create(DWARF_REG_MIN_REQ, - mempool_alloc_slab, - mempool_free_slab, - dwarf_reg_cachep); - - while ((char *)entry < __stop_eh_frame) { + while ((char *)entry < eh_frame_end) { p = entry; count = dwarf_entry_len(p, &len); @@ -949,6 +944,7 @@ static int __init dwarf_unwinder_init(void) * entry and move to the next one because 'len' * tells us where our next entry is. */ + err = -EINVAL; goto out; } else p += count; @@ -960,13 +956,14 @@ static int __init dwarf_unwinder_init(void) p += 4; if (entry_type == DW_EH_FRAME_CIE) { - err = dwarf_parse_cie(entry, p, len, end); + err = dwarf_parse_cie(entry, p, len, end, mod); if (err < 0) goto out; else c_entries++; } else { - err = dwarf_parse_fde(entry, entry_type, p, len, end); + err = dwarf_parse_fde(entry, entry_type, p, len, + end, mod); if (err < 0) goto out; else @@ -979,6 +976,129 @@ static int __init dwarf_unwinder_init(void) printk(KERN_INFO "DWARF unwinder initialised: read %u CIEs, %u FDEs\n", c_entries, f_entries); + return 0; + +out: + return err; +} + +#ifdef CONFIG_MODULES +int module_dwarf_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, + struct module *me) +{ + unsigned int i, err; + unsigned long start, end; + char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + + start = end = 0; + + for (i = 1; i < hdr->e_shnum; i++) { + /* Alloc bit cleared means "ignore it." */ + if ((sechdrs[i].sh_flags & SHF_ALLOC) + && !strcmp(secstrings+sechdrs[i].sh_name, ".eh_frame")) { + start = sechdrs[i].sh_addr; + end = start + sechdrs[i].sh_size; + break; + } + } + + /* Did we find the .eh_frame section? */ + if (i != hdr->e_shnum) { + err = dwarf_parse_section((char *)start, (char *)end, me); + if (err) { + printk(KERN_WARNING "%s: failed to parse DWARF info\n", + me->name); + return err; + } + } + + return 0; +} + +/** + * module_dwarf_cleanup - remove FDE/CIEs associated with @mod + * @mod: the module that is being unloaded + * + * Remove any FDEs and CIEs from the global lists that came from + * @mod's .eh_frame section because @mod is being unloaded. + */ +void module_dwarf_cleanup(struct module *mod) +{ + struct dwarf_fde *fde; + struct dwarf_cie *cie; + unsigned long flags; + + spin_lock_irqsave(&dwarf_cie_lock, flags); + +again_cie: + list_for_each_entry(cie, &dwarf_cie_list, link) { + if (cie->mod == mod) + break; + } + + if (&cie->link != &dwarf_cie_list) { + list_del(&cie->link); + kfree(cie); + goto again_cie; + } + + spin_unlock_irqrestore(&dwarf_cie_lock, flags); + + spin_lock_irqsave(&dwarf_fde_lock, flags); + +again_fde: + list_for_each_entry(fde, &dwarf_fde_list, link) { + if (fde->mod == mod) + break; + } + + if (&fde->link != &dwarf_fde_list) { + list_del(&fde->link); + kfree(fde); + goto again_fde; + } + + spin_unlock_irqrestore(&dwarf_fde_lock, flags); +} +#endif /* CONFIG_MODULES */ + +/** + * dwarf_unwinder_init - initialise the dwarf unwinder + * + * Build the data structures describing the .dwarf_frame section to + * make it easier to lookup CIE and FDE entries. Because the + * .eh_frame section is packed as tightly as possible it is not + * easy to lookup the FDE for a given PC, so we build a list of FDE + * and CIE entries that make it easier. + */ +static int __init dwarf_unwinder_init(void) +{ + int err; + INIT_LIST_HEAD(&dwarf_cie_list); + INIT_LIST_HEAD(&dwarf_fde_list); + + dwarf_frame_cachep = kmem_cache_create("dwarf_frames", + sizeof(struct dwarf_frame), 0, + SLAB_PANIC | SLAB_HWCACHE_ALIGN | SLAB_NOTRACK, NULL); + + dwarf_reg_cachep = kmem_cache_create("dwarf_regs", + sizeof(struct dwarf_reg), 0, + SLAB_PANIC | SLAB_HWCACHE_ALIGN | SLAB_NOTRACK, NULL); + + dwarf_frame_pool = mempool_create(DWARF_FRAME_MIN_REQ, + mempool_alloc_slab, + mempool_free_slab, + dwarf_frame_cachep); + + dwarf_reg_pool = mempool_create(DWARF_REG_MIN_REQ, + mempool_alloc_slab, + mempool_free_slab, + dwarf_reg_cachep); + + err = dwarf_parse_section(__start_eh_frame, __stop_eh_frame, NULL); + if (err) + goto out; + err = unwinder_register(&dwarf_unwinder); if (err) goto out; diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S index 3eb84931d2a..f0abd58c3a6 100644 --- a/arch/sh/kernel/entry-common.S +++ b/arch/sh/kernel/entry-common.S @@ -133,7 +133,7 @@ work_pending: ! r8: current_thread_info ! t: result of "tst #_TIF_NEED_RESCHED, r0" bf/s work_resched - tst #(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), r0 + tst #_TIF_SIGPENDING, r0 work_notifysig: bt/s __restore_all mov r15, r4 diff --git a/arch/sh/kernel/ftrace.c b/arch/sh/kernel/ftrace.c index 2c48e267256..b6f41c109be 100644 --- a/arch/sh/kernel/ftrace.c +++ b/arch/sh/kernel/ftrace.c @@ -62,6 +62,150 @@ static unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr) return ftrace_replaced_code; } +/* + * Modifying code must take extra care. On an SMP machine, if + * the code being modified is also being executed on another CPU + * that CPU will have undefined results and possibly take a GPF. + * We use kstop_machine to stop other CPUS from exectuing code. + * But this does not stop NMIs from happening. We still need + * to protect against that. We separate out the modification of + * the code to take care of this. + * + * Two buffers are added: An IP buffer and a "code" buffer. + * + * 1) Put the instruction pointer into the IP buffer + * and the new code into the "code" buffer. + * 2) Wait for any running NMIs to finish and set a flag that says + * we are modifying code, it is done in an atomic operation. + * 3) Write the code + * 4) clear the flag. + * 5) Wait for any running NMIs to finish. + * + * If an NMI is executed, the first thing it does is to call + * "ftrace_nmi_enter". This will check if the flag is set to write + * and if it is, it will write what is in the IP and "code" buffers. + * + * The trick is, it does not matter if everyone is writing the same + * content to the code location. Also, if a CPU is executing code + * it is OK to write to that code location if the contents being written + * are the same as what exists. + */ +#define MOD_CODE_WRITE_FLAG (1 << 31) /* set when NMI should do the write */ +static atomic_t nmi_running = ATOMIC_INIT(0); +static int mod_code_status; /* holds return value of text write */ +static void *mod_code_ip; /* holds the IP to write to */ +static void *mod_code_newcode; /* holds the text to write to the IP */ + +static unsigned nmi_wait_count; +static atomic_t nmi_update_count = ATOMIC_INIT(0); + +int ftrace_arch_read_dyn_info(char *buf, int size) +{ + int r; + + r = snprintf(buf, size, "%u %u", + nmi_wait_count, + atomic_read(&nmi_update_count)); + return r; +} + +static void clear_mod_flag(void) +{ + int old = atomic_read(&nmi_running); + + for (;;) { + int new = old & ~MOD_CODE_WRITE_FLAG; + + if (old == new) + break; + + old = atomic_cmpxchg(&nmi_running, old, new); + } +} + +static void ftrace_mod_code(void) +{ + /* + * Yes, more than one CPU process can be writing to mod_code_status. + * (and the code itself) + * But if one were to fail, then they all should, and if one were + * to succeed, then they all should. + */ + mod_code_status = probe_kernel_write(mod_code_ip, mod_code_newcode, + MCOUNT_INSN_SIZE); + + /* if we fail, then kill any new writers */ + if (mod_code_status) + clear_mod_flag(); +} + +void ftrace_nmi_enter(void) +{ + if (atomic_inc_return(&nmi_running) & MOD_CODE_WRITE_FLAG) { + smp_rmb(); + ftrace_mod_code(); + atomic_inc(&nmi_update_count); + } + /* Must have previous changes seen before executions */ + smp_mb(); +} + +void ftrace_nmi_exit(void) +{ + /* Finish all executions before clearing nmi_running */ + smp_mb(); + atomic_dec(&nmi_running); +} + +static void wait_for_nmi_and_set_mod_flag(void) +{ + if (!atomic_cmpxchg(&nmi_running, 0, MOD_CODE_WRITE_FLAG)) + return; + + do { + cpu_relax(); + } while (atomic_cmpxchg(&nmi_running, 0, MOD_CODE_WRITE_FLAG)); + + nmi_wait_count++; +} + +static void wait_for_nmi(void) +{ + if (!atomic_read(&nmi_running)) + return; + + do { + cpu_relax(); + } while (atomic_read(&nmi_running)); + + nmi_wait_count++; +} + +static int +do_ftrace_mod_code(unsigned long ip, void *new_code) +{ + mod_code_ip = (void *)ip; + mod_code_newcode = new_code; + + /* The buffers need to be visible before we let NMIs write them */ + smp_mb(); + + wait_for_nmi_and_set_mod_flag(); + + /* Make sure all running NMIs have finished before we write the code */ + smp_mb(); + + ftrace_mod_code(); + + /* Make sure the write happens before clearing the bit */ + smp_mb(); + + clear_mod_flag(); + wait_for_nmi(); + + return mod_code_status; +} + static int ftrace_modify_code(unsigned long ip, unsigned char *old_code, unsigned char *new_code) { @@ -86,7 +230,7 @@ static int ftrace_modify_code(unsigned long ip, unsigned char *old_code, return -EINVAL; /* replace the text with the new text */ - if (probe_kernel_write((void *)ip, new_code, MCOUNT_INSN_SIZE)) + if (do_ftrace_mod_code(ip, new_code)) return -EPERM; flush_icache_range(ip, ip + MCOUNT_INSN_SIZE); diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S index a78be74b8d3..1151ecdffa7 100644 --- a/arch/sh/kernel/head_32.S +++ b/arch/sh/kernel/head_32.S @@ -33,7 +33,7 @@ ENTRY(empty_zero_page) .long 1 /* LOADER_TYPE */ .long 0x00000000 /* INITRD_START */ .long 0x00000000 /* INITRD_SIZE */ -#ifdef CONFIG_32BIT +#if defined(CONFIG_32BIT) && defined(CONFIG_PMB_FIXED) .long 0x53453f00 + 32 /* "SE?" = 32 bit */ #else .long 0x53453f00 + 29 /* "SE?" = 29 bit */ diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c index 27ff2dc093c..aaff0037fcd 100644 --- a/arch/sh/kernel/idle.c +++ b/arch/sh/kernel/idle.c @@ -21,7 +21,7 @@ #include <asm/atomic.h> static int hlt_counter; -void (*pm_idle)(void); +void (*pm_idle)(void) = NULL; void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off); @@ -39,48 +39,92 @@ static int __init hlt_setup(char *__unused) } __setup("hlt", hlt_setup); +static inline int hlt_works(void) +{ + return !hlt_counter; +} + +/* + * On SMP it's slightly faster (but much more power-consuming!) + * to poll the ->work.need_resched flag instead of waiting for the + * cross-CPU IPI to arrive. Use this option with caution. + */ +static void poll_idle(void) +{ + local_irq_enable(); + while (!need_resched()) + cpu_relax(); +} + void default_idle(void) { - if (!hlt_counter) { + if (hlt_works()) { clear_thread_flag(TIF_POLLING_NRFLAG); smp_mb__after_clear_bit(); - set_bl_bit(); - stop_critical_timings(); - while (!need_resched()) + if (!need_resched()) { + local_irq_enable(); cpu_sleep(); + } else + local_irq_enable(); - start_critical_timings(); - clear_bl_bit(); set_thread_flag(TIF_POLLING_NRFLAG); } else - while (!need_resched()) - cpu_relax(); + poll_idle(); } +/* + * The idle thread. There's no useful work to be done, so just try to conserve + * power and have a low exit latency (ie sit in a loop waiting for somebody to + * say that they'd like to reschedule) + */ void cpu_idle(void) { + unsigned int cpu = smp_processor_id(); + set_thread_flag(TIF_POLLING_NRFLAG); /* endless idle loop with no priority at all */ while (1) { - void (*idle)(void) = pm_idle; + tick_nohz_stop_sched_tick(1); - if (!idle) - idle = default_idle; + while (!need_resched() && cpu_online(cpu)) { + check_pgt_cache(); + rmb(); - tick_nohz_stop_sched_tick(1); - while (!need_resched()) - idle(); - tick_nohz_restart_sched_tick(); + local_irq_disable(); + /* Don't trace irqs off for idle */ + stop_critical_timings(); + pm_idle(); + /* + * Sanity check to ensure that pm_idle() returns + * with IRQs enabled + */ + WARN_ON(irqs_disabled()); + start_critical_timings(); + } + tick_nohz_restart_sched_tick(); preempt_enable_no_resched(); schedule(); preempt_disable(); - check_pgt_cache(); } } +void __cpuinit select_idle_routine(void) +{ + /* + * If a platform has set its own idle routine, leave it alone. + */ + if (pm_idle) + return; + + if (hlt_works()) + pm_idle = default_idle; + else + pm_idle = poll_idle; +} + static void do_nothing(void *unused) { } diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c index eac7da772fc..7aa89fac1f8 100644 --- a/arch/sh/kernel/irq.c +++ b/arch/sh/kernel/irq.c @@ -37,7 +37,15 @@ void ack_bad_irq(unsigned int irq) */ static int show_other_interrupts(struct seq_file *p, int prec) { + int j; + + seq_printf(p, "%*s: ", prec, "NMI"); + for_each_online_cpu(j) + seq_printf(p, "%10u ", irq_stat[j].__nmi_count); + seq_printf(p, " Non-maskable interrupts\n"); + seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count)); + return 0; } diff --git a/arch/sh/kernel/irq_32.c b/arch/sh/kernel/irq_32.c new file mode 100644 index 00000000000..b98a694ead3 --- /dev/null +++ b/arch/sh/kernel/irq_32.c @@ -0,0 +1,57 @@ +/* + * SHcompact irqflags support + * + * Copyright (C) 2006 - 2009 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/irqflags.h> +#include <linux/module.h> + +void raw_local_irq_restore(unsigned long flags) +{ + unsigned long __dummy0, __dummy1; + + if (flags == RAW_IRQ_DISABLED) { + __asm__ __volatile__ ( + "stc sr, %0\n\t" + "or #0xf0, %0\n\t" + "ldc %0, sr\n\t" + : "=&z" (__dummy0) + : /* no inputs */ + : "memory" + ); + } else { + __asm__ __volatile__ ( + "stc sr, %0\n\t" + "and %1, %0\n\t" +#ifdef CONFIG_CPU_HAS_SR_RB + "stc r6_bank, %1\n\t" + "or %1, %0\n\t" +#endif + "ldc %0, sr\n\t" + : "=&r" (__dummy0), "=r" (__dummy1) + : "1" (~RAW_IRQ_DISABLED) + : "memory" + ); + } +} +EXPORT_SYMBOL(raw_local_irq_restore); + +unsigned long __raw_local_save_flags(void) +{ + unsigned long flags; + + __asm__ __volatile__ ( + "stc sr, %0\n\t" + "and #0xf0, %0\n\t" + : "=&z" (flags) + : /* no inputs */ + : "memory" + ); + + return flags; +} +EXPORT_SYMBOL(__raw_local_save_flags); diff --git a/arch/sh/kernel/irq_64.c b/arch/sh/kernel/irq_64.c new file mode 100644 index 00000000000..09d92718c99 --- /dev/null +++ b/arch/sh/kernel/irq_64.c @@ -0,0 +1,51 @@ +/* + * SHmedia irqflags support + * + * Copyright (C) 2006 - 2009 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/irqflags.h> +#include <linux/module.h> +#include <cpu/registers.h> + +void raw_local_irq_restore(unsigned long flags) +{ + unsigned long long __dummy; + + if (flags == RAW_IRQ_DISABLED) { + __asm__ __volatile__ ( + "getcon " __SR ", %0\n\t" + "or %0, %1, %0\n\t" + "putcon %0, " __SR "\n\t" + : "=&r" (__dummy) + : "r" (RAW_IRQ_DISABLED) + ); + } else { + __asm__ __volatile__ ( + "getcon " __SR ", %0\n\t" + "and %0, %1, %0\n\t" + "putcon %0, " __SR "\n\t" + : "=&r" (__dummy) + : "r" (~RAW_IRQ_DISABLED) + ); + } +} +EXPORT_SYMBOL(raw_local_irq_restore); + +unsigned long __raw_local_save_flags(void) +{ + unsigned long flags; + + __asm__ __volatile__ ( + "getcon " __SR ", %0\n\t" + "and %0, %1, %0" + : "=&r" (flags) + : "r" (RAW_IRQ_DISABLED) + ); + + return flags; +} +EXPORT_SYMBOL(__raw_local_save_flags); diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c index 7ea2704ea03..de7cf5477d3 100644 --- a/arch/sh/kernel/machine_kexec.c +++ b/arch/sh/kernel/machine_kexec.c @@ -49,7 +49,7 @@ int machine_kexec_prepare(struct kimage *image) /* older versions of kexec-tools are passing * the zImage entry point as a virtual address. */ - if (image->start != PHYSADDR(image->start)) + if (image->start != __pa(image->start)) return -EINVAL; /* upgrade your kexec-tools */ return 0; diff --git a/arch/sh/kernel/module.c b/arch/sh/kernel/module.c index c2efdcde266..43adddfe4c0 100644 --- a/arch/sh/kernel/module.c +++ b/arch/sh/kernel/module.c @@ -32,6 +32,7 @@ #include <linux/string.h> #include <linux/kernel.h> #include <asm/unaligned.h> +#include <asm/dwarf.h> void *module_alloc(unsigned long size) { @@ -145,10 +146,16 @@ int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { - return module_bug_finalize(hdr, sechdrs, me); + int ret = 0; + + ret |= module_dwarf_finalize(hdr, sechdrs, me); + ret |= module_bug_finalize(hdr, sechdrs, me); + + return ret; } void module_arch_cleanup(struct module *mod) { module_bug_cleanup(mod); + module_dwarf_cleanup(mod); } diff --git a/arch/sh/kernel/return_address.c b/arch/sh/kernel/return_address.c new file mode 100644 index 00000000000..df3ab581107 --- /dev/null +++ b/arch/sh/kernel/return_address.c @@ -0,0 +1,54 @@ +/* + * arch/sh/kernel/return_address.c + * + * Copyright (C) 2009 Matt Fleming + * Copyright (C) 2009 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/kernel.h> +#include <asm/dwarf.h> + +#ifdef CONFIG_DWARF_UNWINDER + +void *return_address(unsigned int depth) +{ + struct dwarf_frame *frame; + unsigned long ra; + int i; + + for (i = 0, frame = NULL, ra = 0; i <= depth; i++) { + struct dwarf_frame *tmp; + + tmp = dwarf_unwind_stack(ra, frame); + + if (frame) + dwarf_free_frame(frame); + + frame = tmp; + + if (!frame || !frame->return_addr) + break; + + ra = frame->return_addr; + } + + /* Failed to unwind the stack to the specified depth. */ + WARN_ON(i != depth + 1); + + if (frame) + dwarf_free_frame(frame); + + return (void *)ra; +} + +#else + +void *return_address(unsigned int depth) +{ + return NULL; +} + +#endif diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index 99b4fb553bf..5a947a2567e 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -453,6 +453,10 @@ void __init setup_arch(char **cmdline_p) paging_init(); +#ifdef CONFIG_PMB_ENABLE + pmb_init(); +#endif + #ifdef CONFIG_SMP plat_smp_setup(); #endif diff --git a/arch/sh/kernel/sh_ksyms_32.c b/arch/sh/kernel/sh_ksyms_32.c index 444cce3ae92..509830da6f3 100644 --- a/arch/sh/kernel/sh_ksyms_32.c +++ b/arch/sh/kernel/sh_ksyms_32.c @@ -108,13 +108,10 @@ DECLARE_EXPORT(__udivsi3_i4); DECLARE_EXPORT(__sdivsi3_i4i); DECLARE_EXPORT(__udivsi3_i4i); -#if !defined(CONFIG_CACHE_OFF) && (defined(CONFIG_CPU_SH4) || \ - defined(CONFIG_SH7705_CACHE_32KB)) /* needed by some modules */ EXPORT_SYMBOL(flush_cache_all); EXPORT_SYMBOL(flush_cache_range); EXPORT_SYMBOL(flush_dcache_page); -#endif #ifdef CONFIG_MCOUNT DECLARE_EXPORT(mcount); diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c index 3db37425210..12815ce01ec 100644 --- a/arch/sh/kernel/signal_32.c +++ b/arch/sh/kernel/signal_32.c @@ -67,7 +67,8 @@ sys_sigsuspend(old_sigset_t mask, current->state = TASK_INTERRUPTIBLE; schedule(); - set_thread_flag(TIF_RESTORE_SIGMASK); + set_restore_sigmask(); + return -ERESTARTNOHAND; } @@ -590,7 +591,7 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0) if (try_to_freeze()) goto no_signal; - if (test_thread_flag(TIF_RESTORE_SIGMASK)) + if (current_thread_info()->status & TS_RESTORE_SIGMASK) oldset = ¤t->saved_sigmask; else oldset = ¤t->blocked; @@ -602,12 +603,13 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0) /* Whee! Actually deliver the signal. */ if (handle_signal(signr, &ka, &info, oldset, regs, save_r0) == 0) { - /* a signal was successfully delivered; the saved + /* + * A signal was successfully delivered; the saved * sigmask will have been stored in the signal frame, * and will be restored by sigreturn, so we can simply - * clear the TIF_RESTORE_SIGMASK flag */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - clear_thread_flag(TIF_RESTORE_SIGMASK); + * clear the TS_RESTORE_SIGMASK flag + */ + current_thread_info()->status &= ~TS_RESTORE_SIGMASK; tracehook_signal_handler(signr, &info, &ka, regs, test_thread_flag(TIF_SINGLESTEP)); @@ -631,10 +633,12 @@ no_signal: } } - /* if there's no signal to deliver, we just put the saved sigmask - * back */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) { - clear_thread_flag(TIF_RESTORE_SIGMASK); + /* + * If there's no signal to deliver, we just put the saved sigmask + * back. + */ + if (current_thread_info()->status & TS_RESTORE_SIGMASK) { + current_thread_info()->status &= ~TS_RESTORE_SIGMASK; sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); } } diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c index 74793c80a57..feb3dddd319 100644 --- a/arch/sh/kernel/signal_64.c +++ b/arch/sh/kernel/signal_64.c @@ -101,7 +101,7 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset) if (try_to_freeze()) goto no_signal; - if (test_thread_flag(TIF_RESTORE_SIGMASK)) + if (current_thread_info()->status & TS_RESTORE_SIGMASK) oldset = ¤t->saved_sigmask; else if (!oldset) oldset = ¤t->blocked; @@ -115,11 +115,9 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset) /* * If a signal was successfully delivered, the * saved sigmask is in its frame, and we can - * clear the TIF_RESTORE_SIGMASK flag. + * clear the TS_RESTORE_SIGMASK flag. */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - clear_thread_flag(TIF_RESTORE_SIGMASK); - + current_thread_info()->status &= ~TS_RESTORE_SIGMASK; tracehook_signal_handler(signr, &info, &ka, regs, 0); return 1; } @@ -146,8 +144,8 @@ no_signal: } /* No signal to deliver -- put the saved sigmask back */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) { - clear_thread_flag(TIF_RESTORE_SIGMASK); + if (current_thread_info()->status & TS_RESTORE_SIGMASK) { + current_thread_info()->status &= ~TS_RESTORE_SIGMASK; sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); } @@ -176,6 +174,7 @@ sys_sigsuspend(old_sigset_t mask, while (1) { current->state = TASK_INTERRUPTIBLE; schedule(); + set_restore_sigmask(); regs->pc += 4; /* because sys_sigreturn decrements the pc */ if (do_signal(regs, &saveset)) { /* pc now points at signal handler. Need to decrement diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c index 160db1003cf..983e0792d5f 100644 --- a/arch/sh/kernel/smp.c +++ b/arch/sh/kernel/smp.c @@ -122,7 +122,9 @@ int __cpuinit __cpu_up(unsigned int cpu) stack_start.bss_start = 0; /* don't clear bss for secondary cpus */ stack_start.start_kernel_fn = start_secondary; - flush_cache_all(); + flush_icache_range((unsigned long)&stack_start, + (unsigned long)&stack_start + sizeof(stack_start)); + wmb(); plat_start_cpu(cpu, (unsigned long)_stext); diff --git a/arch/sh/kernel/topology.c b/arch/sh/kernel/topology.c index 0838942b708..9b0b633b6c9 100644 --- a/arch/sh/kernel/topology.c +++ b/arch/sh/kernel/topology.c @@ -16,6 +16,32 @@ static DEFINE_PER_CPU(struct cpu, cpu_devices); +cpumask_t cpu_core_map[NR_CPUS]; + +static cpumask_t cpu_coregroup_map(unsigned int cpu) +{ + /* + * Presently all SH-X3 SMP cores are multi-cores, so just keep it + * simple until we have a method for determining topology.. + */ + return cpu_possible_map; +} + +const struct cpumask *cpu_coregroup_mask(unsigned int cpu) +{ + return &cpu_core_map[cpu]; +} + +int arch_update_cpu_topology(void) +{ + unsigned int cpu; + + for_each_possible_cpu(cpu) + cpu_core_map[cpu] = cpu_coregroup_map(cpu); + + return 0; +} + static int __init topology_init(void) { int i, ret; diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c index a8396f36bd1..d52695df270 100644 --- a/arch/sh/kernel/traps.c +++ b/arch/sh/kernel/traps.c @@ -95,9 +95,11 @@ BUILD_TRAP_HANDLER(bug) BUILD_TRAP_HANDLER(nmi) { + unsigned int cpu = smp_processor_id(); TRAP_HANDLER_DECL; nmi_enter(); + nmi_count(cpu)++; switch (notify_die(DIE_NMI, "NMI", regs, 0, vec & 0xff, SIGINT)) { case NOTIFY_OK: diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c index 7a2ee3a6b8e..114d2176182 100644 --- a/arch/sh/kernel/traps_32.c +++ b/arch/sh/kernel/traps_32.c @@ -945,14 +945,9 @@ void __init trap_init(void) set_exception_table_evt(0x800, do_reserved_inst); set_exception_table_evt(0x820, do_illegal_slot_inst); #elif defined(CONFIG_SH_FPU) -#ifdef CONFIG_CPU_SUBTYPE_SHX3 - set_exception_table_evt(0xd80, fpu_state_restore_trap_handler); - set_exception_table_evt(0xda0, fpu_state_restore_trap_handler); -#else set_exception_table_evt(0x800, fpu_state_restore_trap_handler); set_exception_table_evt(0x820, fpu_state_restore_trap_handler); #endif -#endif #ifdef CONFIG_CPU_SH2 set_exception_table_vec(TRAP_ADDRESS_ERROR, address_error_trap_handler); |