diff options
38 files changed, 1039 insertions, 260 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index fe88418..587da5e 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -117,6 +117,7 @@ config PPC select HAVE_KPROBES select HAVE_ARCH_KGDB select HAVE_KRETPROBES + select HAVE_ARCH_TRACEHOOK select HAVE_LMB select HAVE_DMA_ATTRS if PPC64 select USE_GENERIC_SMP_HELPERS if SMP diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 81c8324..1cbbf70 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -148,7 +148,7 @@ transfer_to_handler: /* Check to see if the dbcr0 register is set up to debug. Use the internal debug mode bit to do this. */ lwz r12,THREAD_DBCR0(r12) - andis. r12,r12,(DBCR0_IDM | DBSR_DAC1R | DBSR_DAC1W)@h + andis. r12,r12,DBCR0_IDM@h beq+ 3f /* From user and task is ptraced - load up global dbcr0 */ li r12,-1 /* clear all pending debug events */ @@ -292,7 +292,7 @@ syscall_exit_cont: /* If the process has its own DBCR0 value, load it up. The internal debug mode bit tells us that dbcr0 should be loaded. */ lwz r0,THREAD+THREAD_DBCR0(r2) - andis. r10,r0,(DBCR0_IDM | DBSR_DAC1R | DBSR_DAC1W)@h + andis. r10,r0,DBCR0_IDM@h bnel- load_dbcr0 #endif #ifdef CONFIG_44x @@ -343,7 +343,12 @@ syscall_dotrace: stw r0,_TRAP(r1) addi r3,r1,STACK_FRAME_OVERHEAD bl do_syscall_trace_enter - lwz r0,GPR0(r1) /* Restore original registers */ + /* + * Restore argument registers possibly just changed. + * We use the return value of do_syscall_trace_enter + * for call number to look up in the table (r0). + */ + mr r0,r3 lwz r3,GPR3(r1) lwz r4,GPR4(r1) lwz r5,GPR5(r1) @@ -720,7 +725,7 @@ restore_user: /* Check whether this process has its own DBCR0 value. The internal debug mode bit tells us that dbcr0 should be loaded. */ lwz r0,THREAD+THREAD_DBCR0(r2) - andis. r10,r0,(DBCR0_IDM | DBSR_DAC1R | DBSR_DAC1W)@h + andis. r10,r0,DBCR0_IDM@h bnel- load_dbcr0 #endif @@ -1055,8 +1060,8 @@ do_user_signal: /* r10 contains MSR_KERNEL here */ SAVE_NVGPRS(r1) rlwinm r3,r3,0,0,30 stw r3,_TRAP(r1) -2: li r3,0 - addi r4,r1,STACK_FRAME_OVERHEAD +2: addi r3,r1,STACK_FRAME_OVERHEAD + mr r4,r9 bl do_signal REST_NVGPRS(r1) b recheck diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index d736924..2d802e9 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -214,7 +214,12 @@ syscall_dotrace: bl .save_nvgprs addi r3,r1,STACK_FRAME_OVERHEAD bl .do_syscall_trace_enter - ld r0,GPR0(r1) /* Restore original registers */ + /* + * Restore argument registers possibly just changed. + * We use the return value of do_syscall_trace_enter + * for the call number to look up in the table (r0). + */ + mr r0,r3 ld r3,GPR3(r1) ld r4,GPR4(r1) ld r5,GPR5(r1) @@ -638,8 +643,7 @@ user_work: b .ret_from_except_lite 1: bl .save_nvgprs - li r3,0 - addi r4,r1,STACK_FRAME_OVERHEAD + addi r3,r1,STACK_FRAME_OVERHEAD bl .do_signal b .ret_from_except diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c index 4d96e1d..9ddfaef 100644 --- a/arch/powerpc/kernel/legacy_serial.c +++ b/arch/powerpc/kernel/legacy_serial.c @@ -493,18 +493,18 @@ static int __init serial_dev_init(void) device_initcall(serial_dev_init); +#ifdef CONFIG_SERIAL_8250_CONSOLE /* * This is called very early, as part of console_init() (typically just after * time_init()). This function is respondible for trying to find a good * default console on serial ports. It tries to match the open firmware - * default output with one of the available serial console drivers, either - * one of the platform serial ports that have been probed earlier by - * find_legacy_serial_ports() or some more platform specific ones. + * default output with one of the available serial console drivers that have + * been probed earlier by find_legacy_serial_ports() */ static int __init check_legacy_serial_console(void) { struct device_node *prom_stdout = NULL; - int speed = 0, offset = 0; + int i, speed = 0, offset = 0; const char *name; const u32 *spd; @@ -548,31 +548,20 @@ static int __init check_legacy_serial_console(void) if (spd) speed = *spd; - if (0) - ; -#ifdef CONFIG_SERIAL_8250_CONSOLE - else if (strcmp(name, "serial") == 0) { - int i; - /* Look for it in probed array */ - for (i = 0; i < legacy_serial_count; i++) { - if (prom_stdout != legacy_serial_infos[i].np) - continue; - offset = i; - speed = legacy_serial_infos[i].speed; - break; - } - if (i >= legacy_serial_count) - goto not_found; + if (strcmp(name, "serial") != 0) + goto not_found; + + /* Look for it in probed array */ + for (i = 0; i < legacy_serial_count; i++) { + if (prom_stdout != legacy_serial_infos[i].np) + continue; + offset = i; + speed = legacy_serial_infos[i].speed; + break; } -#endif /* CONFIG_SERIAL_8250_CONSOLE */ -#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE - else if (strcmp(name, "ch-a") == 0) - offset = 0; - else if (strcmp(name, "ch-b") == 0) - offset = 1; -#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ - else + if (i >= legacy_serial_count) goto not_found; + of_node_put(prom_stdout); DBG("Found serial console at ttyS%d\n", offset); @@ -591,3 +580,4 @@ static int __init check_legacy_serial_console(void) } console_initcall(check_legacy_serial_console); +#endif /* CONFIG_SERIAL_8250_CONSOLE */ diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index db2497c..e030f3b 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -254,7 +254,7 @@ void do_dabr(struct pt_regs *regs, unsigned long address, return; /* Clear the DAC and struct entries. One shot trigger */ -#if (defined(CONFIG_44x) || defined(CONFIG_BOOKE)) +#if defined(CONFIG_BOOKE) mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~(DBSR_DAC1R | DBSR_DAC1W | DBCR0_IDM)); #endif @@ -286,7 +286,7 @@ int set_dabr(unsigned long dabr) mtspr(SPRN_DABR, dabr); #endif -#if defined(CONFIG_44x) || defined(CONFIG_BOOKE) +#if defined(CONFIG_BOOKE) mtspr(SPRN_DAC1, dabr); #endif @@ -373,7 +373,7 @@ struct task_struct *__switch_to(struct task_struct *prev, if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr)) set_dabr(new->thread.dabr); -#if defined(CONFIG_44x) || defined(CONFIG_BOOKE) +#if defined(CONFIG_BOOKE) /* If new thread DAC (HW breakpoint) is the same then leave it */ if (new->thread.dabr) set_dabr(new->thread.dabr); @@ -568,7 +568,7 @@ void flush_thread(void) current->thread.dabr = 0; set_dabr(0); -#if defined(CONFIG_44x) || defined(CONFIG_BOOKE) +#if defined(CONFIG_BOOKE) current->thread.dbcr0 &= ~(DBSR_DAC1R | DBSR_DAC1W); #endif } diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index c4ab219..b72849a 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -205,8 +205,6 @@ static int __initdata mem_reserve_cnt; static cell_t __initdata regbuf[1024]; -#define MAX_CPU_THREADS 2 - /* * Error results ... some OF calls will return "-1" on error, some * will return 0, some will return either. To simplify, here are @@ -1339,10 +1337,6 @@ static void __init prom_hold_cpus(void) unsigned int reg; phandle node; char type[64]; - int cpuid = 0; - unsigned int interrupt_server[MAX_CPU_THREADS]; - unsigned int cpu_threads, hw_cpu_num; - int propsize; struct prom_t *_prom = &RELOC(prom); unsigned long *spinloop = (void *) LOW_ADDR(__secondary_hold_spinloop); @@ -1386,7 +1380,6 @@ static void __init prom_hold_cpus(void) reg = -1; prom_getprop(node, "reg", ®, sizeof(reg)); - prom_debug("\ncpuid = 0x%x\n", cpuid); prom_debug("cpu hw idx = 0x%x\n", reg); /* Init the acknowledge var which will be reset by @@ -1395,28 +1388,9 @@ static void __init prom_hold_cpus(void) */ *acknowledge = (unsigned long)-1; - propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s", - &interrupt_server, - sizeof(interrupt_server)); - if (propsize < 0) { - /* no property. old hardware has no SMT */ - cpu_threads = 1; - interrupt_server[0] = reg; /* fake it with phys id */ - } else { - /* We have a threaded processor */ - cpu_threads = propsize / sizeof(u32); - if (cpu_threads > MAX_CPU_THREADS) { - prom_printf("SMT: too many threads!\n" - "SMT: found %x, max is %x\n", - cpu_threads, MAX_CPU_THREADS); - cpu_threads = 1; /* ToDo: panic? */ - } - } - - hw_cpu_num = interrupt_server[0]; - if (hw_cpu_num != _prom->cpu) { + if (reg != _prom->cpu) { /* Primary Thread of non-boot cpu */ - prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg); + prom_printf("starting cpu hw idx %x... ", reg); call_prom("start-cpu", 3, 0, node, secondary_hold, reg); @@ -1431,17 +1405,10 @@ static void __init prom_hold_cpus(void) } #ifdef CONFIG_SMP else - prom_printf("%x : boot cpu %x\n", cpuid, reg); + prom_printf("boot cpu hw idx %x\n", reg); #endif /* CONFIG_SMP */ - - /* Reserve cpu #s for secondary threads. They start later. */ - cpuid += cpu_threads; } - if (cpuid > NR_CPUS) - prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS) - ") exceeded: ignoring extras\n"); - prom_debug("prom_hold_cpus: end...\n"); } diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index a5d0e78..6b66cd8 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -22,6 +22,7 @@ #include <linux/errno.h> #include <linux/ptrace.h> #include <linux/regset.h> +#include <linux/tracehook.h> #include <linux/elf.h> #include <linux/user.h> #include <linux/security.h> @@ -717,7 +718,7 @@ void user_disable_single_step(struct task_struct *task) struct pt_regs *regs = task->thread.regs; -#if defined(CONFIG_44x) || defined(CONFIG_BOOKE) +#if defined(CONFIG_BOOKE) /* If DAC then do not single step, skip */ if (task->thread.dabr) return; @@ -744,10 +745,11 @@ int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, if (addr > 0) return -EINVAL; + /* The bottom 3 bits in dabr are flags */ if ((data & ~0x7UL) >= TASK_SIZE) return -EIO; -#ifdef CONFIG_PPC64 +#ifndef CONFIG_BOOKE /* For processors using DABR (i.e. 970), the bottom 3 bits are flags. * It was assumed, on previous implementations, that 3 bits were @@ -769,7 +771,7 @@ int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, task->thread.dabr = data; #endif -#if defined(CONFIG_44x) || defined(CONFIG_BOOKE) +#if defined(CONFIG_BOOKE) /* As described above, it was assumed 3 bits were passed with the data * address, but we will assume only the mode bits will be passed @@ -1013,31 +1015,24 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) return ret; } -static void do_syscall_trace(void) +/* + * We must return the syscall number to actually look up in the table. + * This can be -1L to skip running any syscall at all. + */ +long do_syscall_trace_enter(struct pt_regs *regs) { - /* the 0x80 provides a way for the tracing parent to distinguish - between a syscall stop and SIGTRAP delivery */ - ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) - ? 0x80 : 0)); - - /* - * this isn't the same as continuing with a signal, but it will do - * for normal use. strace only continues with a signal if the - * stopping signal is not SIGTRAP. -brl - */ - if (current->exit_code) { - send_sig(current->exit_code, current, 1); - current->exit_code = 0; - } -} + long ret = 0; -void do_syscall_trace_enter(struct pt_regs *regs) -{ secure_computing(regs->gpr[0]); - if (test_thread_flag(TIF_SYSCALL_TRACE) - && (current->ptrace & PT_PTRACED)) - do_syscall_trace(); + if (test_thread_flag(TIF_SYSCALL_TRACE) && + tracehook_report_syscall_entry(regs)) + /* + * Tracing decided this syscall should not happen. + * We'll return a bogus call number to get an ENOSYS + * error, but leave the original number in regs->gpr[0]. + */ + ret = -1L; if (unlikely(current->audit_context)) { #ifdef CONFIG_PPC64 @@ -1055,16 +1050,19 @@ void do_syscall_trace_enter(struct pt_regs *regs) regs->gpr[5] & 0xffffffff, regs->gpr[6] & 0xffffffff); } + + return ret ?: regs->gpr[0]; } void do_syscall_trace_leave(struct pt_regs *regs) { + int step; + if (unlikely(current->audit_context)) audit_syscall_exit((regs->ccr&0x10000000)?AUDITSC_FAILURE:AUDITSC_SUCCESS, regs->result); - if ((test_thread_flag(TIF_SYSCALL_TRACE) - || test_thread_flag(TIF_SINGLESTEP)) - && (current->ptrace & PT_PTRACED)) - do_syscall_trace(); + step = test_thread_flag(TIF_SINGLESTEP); + if (step || test_thread_flag(TIF_SYSCALL_TRACE)) + tracehook_report_syscall_exit(regs, step); } diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 61a3f413..9cc5a52 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -367,7 +367,6 @@ static void __init cpu_init_thread_core_maps(int tpc) * setup_cpu_maps - initialize the following cpu maps: * cpu_possible_map * cpu_present_map - * cpu_sibling_map * * Having the possible map set up early allows us to restrict allocations * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. @@ -475,29 +474,6 @@ void __init smp_setup_cpu_maps(void) */ cpu_init_thread_core_maps(nthreads); } - -/* - * Being that cpu_sibling_map is now a per_cpu array, then it cannot - * be initialized until the per_cpu areas have been created. This - * function is now called from setup_per_cpu_areas(). - */ -void __init smp_setup_cpu_sibling_map(void) -{ -#ifdef CONFIG_PPC64 - int i, cpu, base; - - for_each_possible_cpu(cpu) { - DBG("Sibling map for CPU %d:", cpu); - base = cpu_first_thread_in_core(cpu); - for (i = 0; i < threads_per_core; i++) { - cpu_set(base + i, per_cpu(cpu_sibling_map, cpu)); - DBG(" %d", base + i); - } - DBG("\n"); - } - -#endif /* CONFIG_PPC64 */ -} #endif /* CONFIG_SMP */ #ifdef CONFIG_PCSPKR_PLATFORM diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 04d8de9..8b25f51 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -611,9 +611,6 @@ void __init setup_per_cpu_areas(void) paca[i].data_offset = ptr - __per_cpu_start; memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start); } - - /* Now that per_cpu is setup, initialize cpu_sibling_map */ - smp_setup_cpu_sibling_map(); } #endif diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index 7aada78..a54405e 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -9,7 +9,7 @@ * this archive for more details. */ -#include <linux/ptrace.h> +#include <linux/tracehook.h> #include <linux/signal.h> #include <asm/uaccess.h> #include <asm/unistd.h> @@ -112,7 +112,7 @@ static void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka, } } -int do_signal(sigset_t *oldset, struct pt_regs *regs) +static int do_signal_pending(sigset_t *oldset, struct pt_regs *regs) { siginfo_t info; int signr; @@ -147,7 +147,7 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs) */ if (current->thread.dabr) { set_dabr(current->thread.dabr); -#if defined(CONFIG_44x) || defined(CONFIG_BOOKE) +#if defined(CONFIG_BOOKE) mtspr(SPRN_DBCR0, current->thread.dbcr0); #endif } @@ -177,11 +177,28 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs) * its frame, and we can clear the TLF_RESTORE_SIGMASK flag. */ current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK; + + /* + * Let tracing know that we've done the handler setup. + */ + tracehook_signal_handler(signr, &info, &ka, regs, + test_thread_flag(TIF_SINGLESTEP)); } return ret; } +void do_signal(struct pt_regs *regs, unsigned long thread_info_flags) +{ + if (thread_info_flags & _TIF_SIGPENDING) + do_signal_pending(NULL, regs); + + if (thread_info_flags & _TIF_NOTIFY_RESUME) { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + } +} + long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, unsigned long r5, unsigned long r6, unsigned long r7, unsigned long r8, struct pt_regs *regs) diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index f5ae9fa..5337ca7 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -41,6 +41,7 @@ #include <asm/smp.h> #include <asm/time.h> #include <asm/machdep.h> +#include <asm/cputhreads.h> #include <asm/cputable.h> #include <asm/system.h> #include <asm/mpic.h> @@ -62,10 +63,12 @@ struct thread_info *secondary_ti; cpumask_t cpu_possible_map = CPU_MASK_NONE; cpumask_t cpu_online_map = CPU_MASK_NONE; DEFINE_PER_CPU(cpumask_t, cpu_sibling_map) = CPU_MASK_NONE; +DEFINE_PER_CPU(cpumask_t, cpu_core_map) = CPU_MASK_NONE; EXPORT_SYMBOL(cpu_online_map); EXPORT_SYMBOL(cpu_possible_map); EXPORT_PER_CPU_SYMBOL(cpu_sibling_map); +EXPORT_PER_CPU_SYMBOL(cpu_core_map); /* SMP operations for this machine */ struct smp_ops_t *smp_ops; @@ -228,6 +231,8 @@ void __devinit smp_prepare_boot_cpu(void) BUG_ON(smp_processor_id() != boot_cpuid); cpu_set(boot_cpuid, cpu_online_map); + cpu_set(boot_cpuid, per_cpu(cpu_sibling_map, boot_cpuid)); + cpu_set(boot_cpuid, per_cpu(cpu_core_map, boot_cpuid)); #ifdef CONFIG_PPC64 paca[boot_cpuid].__current = current; #endif @@ -375,11 +380,60 @@ int __cpuinit __cpu_up(unsigned int cpu) return 0; } +/* Return the value of the reg property corresponding to the given + * logical cpu. + */ +int cpu_to_core_id(int cpu) +{ + struct device_node *np; + const int *reg; + int id = -1; + + np = of_get_cpu_node(cpu, NULL); + if (!np) + goto out; + + reg = of_get_property(np, "reg", NULL); + if (!reg) + goto out; + + id = *reg; +out: + of_node_put(np); + return id; +} + +/* Must be called when no change can occur to cpu_present_map, + * i.e. during cpu online or offline. + */ +static struct device_node *cpu_to_l2cache(int cpu) +{ + struct device_node *np; + const phandle *php; + phandle ph; + + if (!cpu_present(cpu)) + return NULL; + + np = of_get_cpu_node(cpu, NULL); + if (np == NULL) + return NULL; + + php = of_get_property(np, "l2-cache", NULL); + if (php == NULL) + return NULL; + ph = *php; + of_node_put(np); + + return of_find_node_by_phandle(ph); +} /* Activate a secondary processor. */ int __devinit start_secondary(void *unused) { unsigned int cpu = smp_processor_id(); + struct device_node *l2_cache; + int i, base; atomic_inc(&init_mm.mm_count); current->active_mm = &init_mm; @@ -400,6 +454,33 @@ int __devinit start_secondary(void *unused) ipi_call_lock(); cpu_set(cpu, cpu_online_map); + /* Update sibling maps */ + base = cpu_first_thread_in_core(cpu); + for (i = 0; i < threads_per_core; i++) { + if (cpu_is_offline(base + i)) + continue; + cpu_set(cpu, per_cpu(cpu_sibling_map, base + i)); + cpu_set(base + i, per_cpu(cpu_sibling_map, cpu)); + + /* cpu_core_map should be a superset of + * cpu_sibling_map even if we don't have cache + * information, so update the former here, too. + */ + cpu_set(cpu, per_cpu(cpu_core_map, base +i)); + cpu_set(base + i, per_cpu(cpu_core_map, cpu)); + } + l2_cache = cpu_to_l2cache(cpu); + for_each_online_cpu(i) { + struct device_node *np = cpu_to_l2cache(i); + if (!np) + continue; + if (np == l2_cache) { + cpu_set(cpu, per_cpu(cpu_core_map, i)); + cpu_set(i, per_cpu(cpu_core_map, cpu)); + } + of_node_put(np); + } + of_node_put(l2_cache); ipi_call_unlock(); local_irq_enable(); @@ -437,10 +518,42 @@ void __init smp_cpus_done(unsigned int max_cpus) #ifdef CONFIG_HOTPLUG_CPU int __cpu_disable(void) { - if (smp_ops->cpu_disable) - return smp_ops->cpu_disable(); + struct device_node *l2_cache; + int cpu = smp_processor_id(); + int base, i; + int err; - return -ENOSYS; + if (!smp_ops->cpu_disable) + return -ENOSYS; + + err = smp_ops->cpu_disable(); + if (err) + return err; + + /* Update sibling maps */ + base = cpu_first_thread_in_core(cpu); + for (i = 0; i < threads_per_core; i++) { + cpu_clear(cpu, per_cpu(cpu_sibling_map, base + i)); + cpu_clear(base + i, per_cpu(cpu_sibling_map, cpu)); + cpu_clear(cpu, per_cpu(cpu_core_map, base +i)); + cpu_clear(base + i, per_cpu(cpu_core_map, cpu)); + } + + l2_cache = cpu_to_l2cache(cpu); + for_each_present_cpu(i) { + struct device_node *np = cpu_to_l2cache(i); + if (!np) + continue; + if (np == l2_cache) { + cpu_clear(cpu, per_cpu(cpu_core_map, i)); + cpu_clear(i, per_cpu(cpu_core_map, cpu)); + } + of_node_put(np); + } + of_node_put(l2_cache); + + + return 0; } void __cpu_die(unsigned int cpu) diff --git a/arch/powerpc/kernel/stacktrace.c b/arch/powerpc/kernel/stacktrace.c index f258964..b0dbb1d 100644 --- a/arch/powerpc/kernel/stacktrace.c +++ b/arch/powerpc/kernel/stacktrace.c @@ -13,7 +13,6 @@ #include <linux/module.h> #include <linux/sched.h> #include <linux/stacktrace.h> -#include <linux/module.h> #include <asm/ptrace.h> #include <asm/processor.h> diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c index 800e5e9..56d172d 100644 --- a/arch/powerpc/kernel/sysfs.c +++ b/arch/powerpc/kernel/sysfs.c @@ -22,6 +22,8 @@ static DEFINE_PER_CPU(struct cpu, cpu_devices); +static DEFINE_PER_CPU(struct kobject *, cache_toplevel); + /* SMT stuff */ #ifdef CONFIG_PPC_MULTIPLATFORM @@ -297,8 +299,289 @@ static struct sysdev_attribute pa6t_attrs[] = { #endif /* CONFIG_DEBUG_KERNEL */ }; +struct cache_desc { + struct kobject kobj; + struct cache_desc *next; + const char *type; /* Instruction, Data, or Unified */ + u32 size; /* total cache size in KB */ + u32 line_size; /* in bytes */ + u32 nr_sets; /* number of sets */ + u32 level; /* e.g. 1, 2, 3... */ + u32 associativity; /* e.g. 8-way... 0 is fully associative */ +}; + +DEFINE_PER_CPU(struct cache_desc *, cache_desc); + +static struct cache_desc *kobj_to_cache_desc(struct kobject *k) +{ + return container_of(k, struct cache_desc, kobj); +} + +static void cache_desc_release(struct kobject *k) +{ + struct cache_desc *desc = kobj_to_cache_desc(k); + + pr_debug("%s: releasing %s\n", __func__, kobject_name(k)); + + if (desc->next) + kobject_put(&desc->next->kobj); + + kfree(kobj_to_cache_desc(k)); +} + +static ssize_t cache_desc_show(struct kobject *k, struct attribute *attr, char *buf) +{ + struct kobj_attribute *kobj_attr; + + kobj_attr = container_of(attr, struct kobj_attribute, attr); + + return kobj_attr->show(k, kobj_attr, buf); +} + +static struct sysfs_ops cache_desc_sysfs_ops = { + .show = cache_desc_show, +}; + +static struct kobj_type cache_desc_type = { + .release = cache_desc_release, + .sysfs_ops = &cache_desc_sysfs_ops, +}; + +static ssize_t cache_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) +{ + struct cache_desc *cache = kobj_to_cache_desc(k); + + return sprintf(buf, "%uK\n", cache->size); +} + +static struct kobj_attribute cache_size_attr = + __ATTR(size, 0444, cache_size_show, NULL); + +static ssize_t cache_line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) +{ + struct cache_desc *cache = kobj_to_cache_desc(k); + + return sprintf(buf, "%u\n", cache->line_size); +} + +static struct kobj_attribute cache_line_size_attr = + __ATTR(coherency_line_size, 0444, cache_line_size_show, NULL); + +static ssize_t cache_nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf) +{ + struct cache_desc *cache = kobj_to_cache_desc(k); + + return sprintf(buf, "%u\n", cache->nr_sets); +} + +static struct kobj_attribute cache_nr_sets_attr = + __ATTR(number_of_sets, 0444, cache_nr_sets_show, NULL); + +static ssize_t cache_type_show(struct kobject *k, struct kobj_attribute *attr, char *buf) +{ + struct cache_desc *cache = kobj_to_cache_desc(k); + + return sprintf(buf, "%s\n", cache->type); +} + +static struct kobj_attribute cache_type_attr = + __ATTR(type, 0444, cache_type_show, NULL); + +static ssize_t cache_level_show(struct kobject *k, struct kobj_attribute *attr, char *buf) +{ + struct cache_desc *cache = kobj_to_cache_desc(k); + + return sprintf(buf, "%u\n", cache->level); +} + +static struct kobj_attribute cache_level_attr = + __ATTR(level, 0444, cache_level_show, NULL); + +static ssize_t cache_assoc_show(struct kobject *k, struct kobj_attribute *attr, char *buf) +{ + struct cache_desc *cache = kobj_to_cache_desc(k); + + return sprintf(buf, "%u\n", cache->associativity); +} + +static struct kobj_attribute cache_assoc_attr = + __ATTR(ways_of_associativity, 0444, cache_assoc_show, NULL); + +struct cache_desc_info { + const char *type; + const char *size_prop; + const char *line_size_prop; + const char *nr_sets_prop; +}; + +/* PowerPC Processor binding says the [di]-cache-* must be equal on + * unified caches, so just use d-cache properties. */ +static struct cache_desc_info ucache_info = { + .type = "Unified", + .size_prop = "d-cache-size", + .line_size_prop = "d-cache-line-size", + .nr_sets_prop = "d-cache-sets", +}; -static void register_cpu_online(unsigned int cpu) +static struct cache_desc_info dcache_info = { + .type = "Data", + .size_prop = "d-cache-size", + .line_size_prop = "d-cache-line-size", + .nr_sets_prop = "d-cache-sets", +}; + +static struct cache_desc_info icache_info = { + .type = "Instruction", + .size_prop = "i-cache-size", + .line_size_prop = "i-cache-line-size", + .nr_sets_prop = "i-cache-sets", +}; + +static struct cache_desc * __cpuinit create_cache_desc(struct device_node *np, struct kobject *parent, int index, int level, struct cache_desc_info *info) +{ + const u32 *cache_line_size; + struct cache_desc *new; + const u32 *cache_size; + const u32 *nr_sets; + int rc; + + new = kzalloc(sizeof(*new), GFP_KERNEL); + if (!new) + return NULL; + + rc = kobject_init_and_add(&new->kobj, &cache_desc_type, parent, + "index%d", index); + if (rc) + goto err; + + /* type */ + new->type = info->type; + rc = sysfs_create_file(&new->kobj, &cache_type_attr.attr); + WARN_ON(rc); + + /* level */ + new->level = level; + rc = sysfs_create_file(&new->kobj, &cache_level_attr.attr); + WARN_ON(rc); + + /* size */ + cache_size = of_get_property(np, info->size_prop, NULL); + if (cache_size) { + new->size = *cache_size / 1024; + rc = sysfs_create_file(&new->kobj, + &cache_size_attr.attr); + WARN_ON(rc); + } + + /* coherency_line_size */ + cache_line_size = of_get_property(np, info->line_size_prop, NULL); + if (cache_line_size) { + new->line_size = *cache_line_size; + rc = sysfs_create_file(&new->kobj, + &cache_line_size_attr.attr); + WARN_ON(rc); + } + + /* number_of_sets */ + nr_sets = of_get_property(np, info->nr_sets_prop, NULL); + if (nr_sets) { + new->nr_sets = *nr_sets; + rc = sysfs_create_file(&new->kobj, + &cache_nr_sets_attr.attr); + WARN_ON(rc); + } + + /* ways_of_associativity */ + if (new->nr_sets == 1) { + /* fully associative */ + new->associativity = 0; + goto create_assoc; + } + + if (new->nr_sets && new->size && new->line_size) { + /* If we have values for all of these we can derive + * the associativity. */ + new->associativity = + ((new->size * 1024) / new->nr_sets) / new->line_size; +create_assoc: + rc = sysfs_create_file(&new->kobj, + &cache_assoc_attr.attr); + WARN_ON(rc); + } + + return new; +err: + kfree(new); + return NULL; +} + +static bool cache_is_unified(struct device_node *np) +{ + return of_get_property(np, "cache-unified", NULL); +} + +static struct cache_desc * __cpuinit create_cache_index_info(struct device_node *np, struct kobject *parent, int index, int level) +{ + const phandle *next_cache_phandle; + struct device_node *next_cache; + struct cache_desc *new, **end; + + pr_debug("%s(node = %s, index = %d)\n", __func__, np->full_name, index); + + if (cache_is_unified(np)) { + new = create_cache_desc(np, parent, index, level, + &ucache_info); + } else { + new = create_cache_desc(np, parent, index, level, + &dcache_info); + if (new) { + index++; + new->next = create_cache_desc(np, parent, index, level, + &icache_info); + } + } + if (!new) + return NULL; + + end = &new->next; + while (*end) + end = &(*end)->next; + + next_cache_phandle = of_get_property(np, "l2-cache", NULL); + if (!next_cache_phandle) + goto out; + + next_cache = of_find_node_by_phandle(*next_cache_phandle); + if (!next_cache) + goto out; + + *end = create_cache_index_info(next_cache, parent, ++index, ++level); + + of_node_put(next_cache); +out: + return new; +} + +static void __cpuinit create_cache_info(struct sys_device *sysdev) +{ + struct kobject *cache_toplevel; + struct device_node *np = NULL; + int cpu = sysdev->id; + + cache_toplevel = kobject_create_and_add("cache", &sysdev->kobj); + if (!cache_toplevel) + return; + per_cpu(cache_toplevel, cpu) = cache_toplevel; + np = of_get_cpu_node(cpu, NULL); + if (np != NULL) { + per_cpu(cache_desc, cpu) = + create_cache_index_info(np, cache_toplevel, 0, 1); + of_node_put(np); + } + return; +} + +static void __cpuinit register_cpu_online(unsigned int cpu) { struct cpu *c = &per_cpu(cpu_devices, cpu); struct sys_device *s = &c->sysdev; @@ -346,9 +629,33 @@ static void register_cpu_online(unsigned int cpu) if (cpu_has_feature(CPU_FTR_DSCR)) sysdev_create_file(s, &attr_dscr); + + create_cache_info(s); } #ifdef CONFIG_HOTPLUG_CPU +static void remove_cache_info(struct sys_device *sysdev) +{ + struct kobject *cache_toplevel; + struct cache_desc *cache_desc; + int cpu = sysdev->id; + + cache_desc = per_cpu(cache_desc, cpu); + if (cache_desc != NULL) { + sysfs_remove_file(&cache_desc->kobj, &cache_size_attr.attr); + sysfs_remove_file(&cache_desc->kobj, &cache_line_size_attr.attr); + sysfs_remove_file(&cache_desc->kobj, &cache_type_attr.attr); + sysfs_remove_file(&cache_desc->kobj, &cache_level_attr.attr); + sysfs_remove_file(&cache_desc->kobj, &cache_nr_sets_attr.attr); + sysfs_remove_file(&cache_desc->kobj, &cache_assoc_attr.attr); + + kobject_put(&cache_desc->kobj); + } + cache_toplevel = per_cpu(cache_toplevel, cpu); + if (cache_toplevel != NULL) + kobject_put(cache_toplevel); +} + static void unregister_cpu_online(unsigned int cpu) { struct cpu *c = &per_cpu(cpu_devices, cpu); @@ -399,6 +706,8 @@ static void unregister_cpu_online(unsigned int cpu) if (cpu_has_feature(CPU_FTR_DSCR)) sysdev_remove_file(s, &attr_dscr); + + remove_cache_info(s); } #endif /* CONFIG_HOTPLUG_CPU */ diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c index ade8aea..22a3c33 100644 --- a/arch/powerpc/kernel/vio.c +++ b/arch/powerpc/kernel/vio.c @@ -530,7 +530,7 @@ static dma_addr_t vio_dma_iommu_map_single(struct device *dev, void *vaddr, } ret = dma_iommu_ops.map_single(dev, vaddr, size, direction, attrs); - if (unlikely(dma_mapping_error(ret))) { + if (unlikely(dma_mapping_error(dev, ret))) { vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE)); atomic_inc(&viodev->cmo.allocs_failed); } @@ -1031,8 +1031,8 @@ void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired) {} static int vio_cmo_bus_probe(struct vio_dev *viodev) { return 0; } static void vio_cmo_bus_remove(struct vio_dev *viodev) {} static void vio_cmo_set_dma_ops(struct vio_dev *viodev) {} -static void vio_cmo_bus_init() {} -static void vio_cmo_sysfs_init() { } +static void vio_cmo_bus_init(void) {} +static void vio_cmo_sysfs_init(void) { } #endif /* CONFIG_PPC_SMLPAR */ EXPORT_SYMBOL(vio_cmo_entitlement_update); EXPORT_SYMBOL(vio_cmo_set_dev_desired); diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index ed0aab0..f1c2d55 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -736,14 +736,21 @@ static int __init hugetlbpage_init(void) if (!cpu_has_feature(CPU_FTR_16M_PAGE)) return -ENODEV; + /* Add supported huge page sizes. Need to change HUGE_MAX_HSTATE * and adjust PTE_NONCACHE_NUM if the number of supported huge page * sizes changes. */ set_huge_psize(MMU_PAGE_16M); - set_huge_psize(MMU_PAGE_64K); set_huge_psize(MMU_PAGE_16G); + /* Temporarily disable support for 64K huge pages when 64K SPU local + * store support is enabled as the current implementation conflicts. + */ +#ifndef CONFIG_SPU_FS_64K_LS + set_huge_psize(MMU_PAGE_64K); +#endif + for (psize = 0; psize < MMU_PAGE_COUNT; ++psize) { if (mmu_huge_psizes[psize]) { huge_pgtable_cache(psize) = kmem_cache_create( diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c index 3163544..88ccf3a 100644 --- a/arch/powerpc/platforms/powermac/setup.c +++ b/arch/powerpc/platforms/powermac/setup.c @@ -541,6 +541,78 @@ static int __init pmac_declare_of_platform_devices(void) } machine_device_initcall(powermac, pmac_declare_of_platform_devices); +#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE +/* + * This is called very early, as part of console_init() (typically just after + * time_init()). This function is respondible for trying to find a good + * default console on serial ports. It tries to match the open firmware + * default output with one of the available serial console drivers. + */ +static int __init check_pmac_serial_console(void) +{ + struct device_node *prom_stdout = NULL; + int offset = 0; + const char *name; +#ifdef CONFIG_SERIAL_PMACZILOG_TTYS + char *devname = "ttyS"; +#else + char *devname = "ttyPZ"; +#endif + + pr_debug(" -> check_pmac_serial_console()\n"); + + /* The user has requested a console so this is already set up. */ + if (strstr(boot_command_line, "console=")) { + pr_debug(" console was specified !\n"); + return -EBUSY; + } + + if (!of_chosen) { + pr_debug(" of_chosen is NULL !\n"); + return -ENODEV; + } + + /* We are getting a weird phandle from OF ... */ + /* ... So use the full path instead */ + name = of_get_property(of_chosen, "linux,stdout-path", NULL); + if (name == NULL) { + pr_debug(" no linux,stdout-path !\n"); + return -ENODEV; + } + prom_stdout = of_find_node_by_path(name); + if (!prom_stdout) { + pr_debug(" can't find stdout package %s !\n", name); + return -ENODEV; + } + pr_debug("stdout is %s\n", prom_stdout->full_name); + + name = of_get_property(prom_stdout, "name", NULL); + if (!name) { + pr_debug(" stdout package has no name !\n"); + goto not_found; + } + + if (strcmp(name, "ch-a") == 0) + offset = 0; + else if (strcmp(name, "ch-b") == 0) + offset = 1; + else + goto not_found; + of_node_put(prom_stdout); + + pr_debug("Found serial console at %s%d\n", devname, offset); + + return add_preferred_console(devname, offset, NULL); + + not_found: + pr_debug("No preferred console found !\n"); + of_node_put(prom_stdout); + return -ENODEV; +} +console_initcall(check_pmac_serial_console); + +#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ + /* * Called very early, MMU is off, device-tree isn't unflattened */ diff --git a/arch/powerpc/platforms/powermac/udbg_scc.c b/arch/powerpc/platforms/powermac/udbg_scc.c index 47de4d3..572771f 100644 --- a/arch/powerpc/platforms/powermac/udbg_scc.c +++ b/arch/powerpc/platforms/powermac/udbg_scc.c @@ -125,13 +125,23 @@ void udbg_scc_init(int force_scc) out_8(sccc, 0xc0); /* If SCC was the OF output port, read the BRG value, else - * Setup for 57600 8N1 + * Setup for 38400 or 57600 8N1 depending on the machine */ if (ch_def != NULL) { out_8(sccc, 13); scc_inittab[1] = in_8(sccc); out_8(sccc, 12); scc_inittab[3] = in_8(sccc); + } else if (machine_is_compatible("RackMac1,1") + || machine_is_compatible("RackMac1,2") + || machine_is_compatible("MacRISC4")) { + /* Xserves and G5s default to 57600 */ + scc_inittab[1] = 0; + scc_inittab[3] = 0; + } else { + /* Others default to 38400 */ + scc_inittab[1] = 0; + scc_inittab[3] = 1; } for (i = 0; i < sizeof(scc_inittab); ++i) diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c index c6b3be0..38fe32a 100644 --- a/arch/powerpc/platforms/pseries/cmm.c +++ b/arch/powerpc/platforms/pseries/cmm.c @@ -289,7 +289,9 @@ static int cmm_thread(void *dummy) } #define CMM_SHOW(name, format, args...) \ - static ssize_t show_##name(struct sys_device *dev, char *buf) \ + static ssize_t show_##name(struct sys_device *dev, \ + struct sysdev_attribute *attr, \ + char *buf) \ { \ return sprintf(buf, format, ##args); \ } \ @@ -298,12 +300,14 @@ static int cmm_thread(void *dummy) CMM_SHOW(loaned_kb, "%lu\n", PAGES2KB(loaned_pages)); CMM_SHOW(loaned_target_kb, "%lu\n", PAGES2KB(loaned_pages_target)); -static ssize_t show_oom_pages(struct sys_device *dev, char *buf) +static ssize_t show_oom_pages(struct sys_device *dev, + struct sysdev_attribute *attr, char *buf) { return sprintf(buf, "%lu\n", PAGES2KB(oom_freed_pages)); } static ssize_t store_oom_pages(struct sys_device *dev, + struct sysdev_attribute *attr, const char *buf, size_t count) { unsigned long val = simple_strtoul (buf, NULL, 10); diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c index 91ec9fd..a03fe1f 100644 --- a/drivers/net/ibmveth.c +++ b/drivers/net/ibmveth.c @@ -260,7 +260,7 @@ static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struc dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, pool->buff_size, DMA_FROM_DEVICE); - if (dma_mapping_error((&adapter->vdev->dev, dma_addr)) + if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) goto failure; pool->free_map[free_index] = IBM_VETH_INVALID_MAP; @@ -294,7 +294,7 @@ failure: pool->consumer_index = pool->size - 1; else pool->consumer_index--; - if (!dma_mapping_error((&adapter->vdev->dev, dma_addr)) + if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) dma_unmap_single(&adapter->vdev->dev, pool->dma_addr[index], pool->buff_size, DMA_FROM_DEVICE); @@ -488,7 +488,7 @@ static void ibmveth_cleanup(struct ibmveth_adapter *adapter) &adapter->rx_buff_pool[i]); if (adapter->bounce_buffer != NULL) { - if (!dma_mapping_error(adapter->bounce_buffer_dma)) { + if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { dma_unmap_single(&adapter->vdev->dev, adapter->bounce_buffer_dma, adapter->netdev->mtu + IBMVETH_BUFF_OH, @@ -924,7 +924,7 @@ static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev) buf[1] = 0; } - if (dma_mapping_error((&adapter->vdev->dev, data_dma_addr)) { + if (dma_mapping_error(&adapter->vdev->dev, data_dma_addr)) { if (!firmware_has_feature(FW_FEATURE_CMO)) ibmveth_error_printk("tx: unable to map xmit buffer\n"); skb_copy_from_linear_data(skb, adapter->bounce_buffer, diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index 1d7ec31..f821dbc 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -13,3 +13,9 @@ config OF_I2C depends on PPC_OF && I2C help OpenFirmware I2C accessors + +config OF_SPI + def_tristate SPI + depends on OF && PPC_OF && SPI + help + OpenFirmware SPI accessors diff --git a/drivers/of/Makefile b/drivers/of/Makefile index 548772e..4c3c6f8 100644 --- a/drivers/of/Makefile +++ b/drivers/of/Makefile @@ -2,3 +2,4 @@ obj-y = base.o obj-$(CONFIG_OF_DEVICE) += device.o platform.o obj-$(CONFIG_OF_GPIO) += gpio.o obj-$(CONFIG_OF_I2C) += of_i2c.o +obj-$(CONFIG_OF_SPI) += of_spi.o diff --git a/drivers/of/base.c b/drivers/of/base.c index 23ffb7c..ad8ac1a 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -385,3 +385,91 @@ struct device_node *of_find_matching_node(struct device_node *from, return np; } EXPORT_SYMBOL(of_find_matching_node); + +/** + * of_modalias_table: Table of explicit compatible ==> modalias mappings + * + * This table allows particulare compatible property values to be mapped + * to modalias strings. This is useful for busses which do not directly + * understand the OF device tree but are populated based on data contained + * within the device tree. SPI and I2C are the two current users of this + * table. + * + * In most cases, devices do not need to be listed in this table because + * the modalias value can be derived directly from the compatible table. + * However, if for any reason a value cannot be derived, then this table + * provides a method to override the implicit derivation. + * + * At the moment, a single table is used for all bus types because it is + * assumed that the data size is small and that the compatible values + * should already be distinct enough to differentiate between SPI, I2C + * and other devices. + */ +struct of_modalias_table { + char *of_device; + char *modalias; +}; +static struct of_modalias_table of_modalias_table[] = { + /* Empty for now; add entries as needed */ +}; + +/** + * of_modalias_node - Lookup appropriate modalias for a device node + * @node: pointer to a device tree node + * @modalias: Pointer to buffer that modalias value will be copied into + * @len: Length of modalias value + * + * Based on the value of the compatible property, this routine will determine + * an appropriate modalias value for a particular device tree node. Three + * separate methods are used to derive a modalias value. + * + * First method is to lookup the compatible value in of_modalias_table. + * Second is to look for a "linux,<modalias>" entry in the compatible list + * and used that for modalias. Third is to strip off the manufacturer + * prefix from the first compatible entry and use the remainder as modalias + * + * This routine returns 0 on success + */ +int of_modalias_node(struct device_node *node, char *modalias, int len) +{ + int i, cplen; + const char *compatible; + const char *p; + + /* 1. search for exception list entry */ + for (i = 0; i < ARRAY_SIZE(of_modalias_table); i++) { + compatible = of_modalias_table[i].of_device; + if (!of_device_is_compatible(node, compatible)) + continue; + strlcpy(modalias, of_modalias_table[i].modalias, len); + return 0; + } + + compatible = of_get_property(node, "compatible", &cplen); + if (!compatible) + return -ENODEV; + + /* 2. search for linux,<modalias> entry */ + p = compatible; + while (cplen > 0) { + if (!strncmp(p, "linux,", 6)) { + p += 6; + strlcpy(modalias, p, len); + return 0; + } + + i = strlen(p) + 1; + p += i; + cplen -= i; + } + + /* 3. take first compatible entry and strip manufacturer */ + p = strchr(compatible, ','); + if (!p) + return -ENODEV; + p++; + strlcpy(modalias, p, len); + return 0; +} +EXPORT_SYMBOL_GPL(of_modalias_node); + diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c index 344e1b0..6a98dc8 100644 --- a/drivers/of/of_i2c.c +++ b/drivers/of/of_i2c.c @@ -16,62 +16,6 @@ #include <linux/of_i2c.h> #include <linux/module.h> -struct i2c_driver_device { - char *of_device; - char *i2c_type; -}; - -static struct i2c_driver_device i2c_devices[] = { -}; - -static int of_find_i2c_driver(struct device_node *node, - struct i2c_board_info *info) -{ - int i, cplen; - const char *compatible; - const char *p; - - /* 1. search for exception list entry */ - for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) { - if (!of_device_is_compatible(node, i2c_devices[i].of_device)) - continue; - if (strlcpy(info->type, i2c_devices[i].i2c_type, - I2C_NAME_SIZE) >= I2C_NAME_SIZE) - return -ENOMEM; - - return 0; - } - - compatible = of_get_property(node, "compatible", &cplen); - if (!compatible) - return -ENODEV; - - /* 2. search for linux,<i2c-type> entry */ - p = compatible; - while (cplen > 0) { - if (!strncmp(p, "linux,", 6)) { - p += 6; - if (strlcpy(info->type, p, - I2C_NAME_SIZE) >= I2C_NAME_SIZE) - return -ENOMEM; - return 0; - } - - i = strlen(p) + 1; - p += i; - cplen -= i; - } - - /* 3. take fist compatible entry and strip manufacturer */ - p = strchr(compatible, ','); - if (!p) - return -ENODEV; - p++; - if (strlcpy(info->type, p, I2C_NAME_SIZE) >= I2C_NAME_SIZE) - return -ENOMEM; - return 0; -} - void of_register_i2c_devices(struct i2c_adapter *adap, struct device_node *adap_node) { @@ -83,6 +27,9 @@ void of_register_i2c_devices(struct i2c_adapter *adap, const u32 *addr; int len; + if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) + continue; + addr = of_get_property(node, "reg", &len); if (!addr || len < sizeof(int) || *addr > (1 << 10) - 1) { printk(KERN_ERR @@ -92,11 +39,6 @@ void of_register_i2c_devices(struct i2c_adapter *adap, info.irq = irq_of_parse_and_map(node, 0); - if (of_find_i2c_driver(node, &info) < 0) { - irq_dispose_mapping(info.irq); - continue; - } - info.addr = *addr; request_module(info.type); diff --git a/drivers/of/of_spi.c b/drivers/of/of_spi.c new file mode 100644 index 0000000..b01eec0 --- /dev/null +++ b/drivers/of/of_spi.c @@ -0,0 +1,93 @@ +/* + * SPI OF support routines + * Copyright (C) 2008 Secret Lab Technologies Ltd. + * + * Support routines for deriving SPI device attachments from the device + * tree. + */ + +#include <linux/of.h> +#include <linux/device.h> +#include <linux/spi/spi.h> +#include <linux/of_spi.h> + +/** + * of_register_spi_devices - Register child devices onto the SPI bus + * @master: Pointer to spi_master device + * @np: parent node of SPI device nodes + * + * Registers an spi_device for each child node of 'np' which has a 'reg' + * property. + */ +void of_register_spi_devices(struct spi_master *master, struct device_node *np) +{ + struct spi_device *spi; + struct device_node *nc; + const u32 *prop; + int rc; + int len; + + for_each_child_of_node(np, nc) { + /* Alloc an spi_device */ + spi = spi_alloc_device(master); + if (!spi) { + dev_err(&master->dev, "spi_device alloc error for %s\n", + nc->full_name); + spi_dev_put(spi); + continue; + } + + /* Select device driver */ + if (of_modalias_node(nc, spi->modalias, + sizeof(spi->modalias)) < 0) { + dev_err(&master->dev, "cannot find modalias for %s\n", + nc->full_name); + spi_dev_put(spi); + continue; + } + + /* Device address */ + prop = of_get_property(nc, "reg", &len); + if (!prop || len < sizeof(*prop)) { + dev_err(&master->dev, "%s has no 'reg' property\n", + nc->full_name); + spi_dev_put(spi); + continue; + } + spi->chip_select = *prop; + + /* Mode (clock phase/polarity/etc.) */ + if (of_find_property(nc, "spi-cpha", NULL)) + spi->mode |= SPI_CPHA; + if (of_find_property(nc, "spi-cpol", NULL)) + spi->mode |= SPI_CPOL; + + /* Device speed */ + prop = of_get_property(nc, "spi-max-frequency", &len); + if (!prop || len < sizeof(*prop)) { + dev_err(&master->dev, "%s has no 'spi-max-frequency' property\n", + nc->full_name); + spi_dev_put(spi); + continue; + } + spi->max_speed_hz = *prop; + + /* IRQ */ + spi->irq = irq_of_parse_and_map(nc, 0); + + /* Store a pointer to the node in the device structure */ + of_node_get(nc); + spi->dev.archdata.of_node = nc; + + /* Register the new device */ + request_module(spi->modalias); + rc = spi_add_device(spi); + if (rc) { + dev_err(&master->dev, "spi_device register error %s\n", + nc->full_name); + spi_dev_put(spi); + } + + } +} +EXPORT_SYMBOL(of_register_spi_devices); diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index ecca4a6..964124b 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -178,6 +178,96 @@ struct boardinfo { static LIST_HEAD(board_list); static DEFINE_MUTEX(board_lock); +/** + * spi_alloc_device - Allocate a new SPI device + * @master: Controller to which device is connected + * Context: can sleep + * + * Allows a driver to allocate and initialize a spi_device without + * registering it immediately. This allows a driver to directly + * fill the spi_device with device parameters before calling + * spi_add_device() on it. + * + * Caller is responsible to call spi_add_device() on the returned + * spi_device structure to add it to the SPI master. If the caller + * needs to discard the spi_device without adding it, then it should + * call spi_dev_put() on it. + * + * Returns a pointer to the new device, or NULL. + */ +struct spi_device *spi_alloc_device(struct spi_master *master) +{ + struct spi_device *spi; + struct device *dev = master->dev.parent; + + if (!spi_master_get(master)) + return NULL; + + spi = kzalloc(sizeof *spi, GFP_KERNEL); + if (!spi) { + dev_err(dev, "cannot alloc spi_device\n"); + spi_master_put(master); + return NULL; + } + + spi->master = master; + spi->dev.parent = dev; + spi->dev.bus = &spi_bus_type; + spi->dev.release = spidev_release; + device_initialize(&spi->dev); + return spi; +} +EXPORT_SYMBOL_GPL(spi_alloc_device); + +/** + * spi_add_device - Add spi_device allocated with spi_alloc_device + * @spi: spi_device to register + * + * Companion function to spi_alloc_device. Devices allocated with + * spi_alloc_device can be added onto the spi bus with this function. + * + * Returns 0 on success; non-zero on failure + */ +int spi_add_device(struct spi_device *spi) +{ + struct device *dev = spi->master->dev.parent; + int status; + + /* Chipselects are numbered 0..max; validate. */ + if (spi->chip_select >= spi->master->num_chipselect) { + dev_err(dev, "cs%d >= max %d\n", + spi->chip_select, + spi->master->num_chipselect); + return -EINVAL; + } + + /* Set the bus ID string */ + snprintf(spi->dev.bus_id, sizeof spi->dev.bus_id, + "%s.%u", spi->master->dev.bus_id, + spi->chip_select); + + /* drivers may modify this initial i/o setup */ + status = spi->master->setup(spi); + if (status < 0) { + dev_err(dev, "can't %s %s, status %d\n", + "setup", spi->dev.bus_id, status); + return status; + } + + /* driver core catches callers that misbehave by defining + * devices that already exist. + */ + status = device_add(&spi->dev); + if (status < 0) { + dev_err(dev, "can't %s %s, status %d\n", + "add", spi->dev.bus_id, status); + return status; + } + + dev_dbg(dev, "registered child %s\n", spi->dev.bus_id); + return 0; +} +EXPORT_SYMBOL_GPL(spi_add_device); /** * spi_new_device - instantiate one new SPI device @@ -197,7 +287,6 @@ struct spi_device *spi_new_device(struct spi_master *master, struct spi_board_info *chip) { struct spi_device *proxy; - struct device *dev = master->dev.parent; int status; /* NOTE: caller did any chip->bus_num checks necessary. @@ -207,66 +296,28 @@ struct spi_device *spi_new_device(struct spi_master *master, * suggests syslogged diagnostics are best here (ugh). */ - /* Chipselects are numbered 0..max; validate. */ - if (chip->chip_select >= master->num_chipselect) { - dev_err(dev, "cs%d > max %d\n", - chip->chip_select, - master->num_chipselect); - return NULL; - } - - if (!spi_master_get(master)) + proxy = spi_alloc_device(master); + if (!proxy) return NULL; WARN_ON(strlen(chip->modalias) >= sizeof(proxy->modalias)); - proxy = kzalloc(sizeof *proxy, GFP_KERNEL); - if (!proxy) { - dev_err(dev, "can't alloc dev for cs%d\n", - chip->chip_select); - goto fail; - } - proxy->master = master; proxy->chip_select = chip->chip_select; proxy->max_speed_hz = chip->max_speed_hz; proxy->mode = chip->mode; proxy->irq = chip->irq; strlcpy(proxy->modalias, chip->modalias, sizeof(proxy->modalias)); - - snprintf(proxy->dev.bus_id, sizeof proxy->dev.bus_id, - "%s.%u", master->dev.bus_id, - chip->chip_select); - proxy->dev.parent = dev; - proxy->dev.bus = &spi_bus_type; proxy->dev.platform_data = (void *) chip->platform_data; proxy->controller_data = chip->controller_data; proxy->controller_state = NULL; - proxy->dev.release = spidev_release; - /* drivers may modify this initial i/o setup */ - status = master->setup(proxy); + status = spi_add_device(proxy); if (status < 0) { - dev_err(dev, "can't %s %s, status %d\n", - "setup", proxy->dev.bus_id, status); - goto fail; + spi_dev_put(proxy); + return NULL; } - /* driver core catches callers that misbehave by defining - * devices that already exist. - */ - status = device_register(&proxy->dev); - if (status < 0) { - dev_err(dev, "can't %s %s, status %d\n", - "add", proxy->dev.bus_id, status); - goto fail; - } - dev_dbg(dev, "registered child %s\n", proxy->dev.bus_id); return proxy; - -fail: - spi_master_put(master); - kfree(proxy); - return NULL; } EXPORT_SYMBOL_GPL(spi_new_device); diff --git a/include/asm-powerpc/pgtable-4k.h b/include/asm-powerpc/pgtable-4k.h index c9601df..6b18ba9 100644 --- a/include/asm-powerpc/pgtable-4k.h +++ b/include/asm-powerpc/pgtable-4k.h @@ -46,6 +46,8 @@ #define _PAGE_GROUP_IX 0x7000 /* software: HPTE index within group */ #define _PAGE_F_SECOND _PAGE_SECONDARY #define _PAGE_F_GIX _PAGE_GROUP_IX +#define _PAGE_SPECIAL 0x10000 /* software: special page */ +#define __HAVE_ARCH_PTE_SPECIAL /* PTE flags to conserve for HPTE identification */ #define _PAGE_HPTEFLAGS (_PAGE_BUSY | _PAGE_HASHPTE | \ diff --git a/include/asm-powerpc/pgtable-64k.h b/include/asm-powerpc/pgtable-64k.h index 7e54adb..07b0d8f 100644 --- a/include/asm-powerpc/pgtable-64k.h +++ b/include/asm-powerpc/pgtable-64k.h @@ -70,6 +70,8 @@ static inline struct subpage_prot_table *pgd_subpage_prot(pgd_t *pgd) #define PGDIR_MASK (~(PGDIR_SIZE-1)) /* Additional PTE bits (don't change without checking asm in hash_low.S) */ +#define __HAVE_ARCH_PTE_SPECIAL +#define _PAGE_SPECIAL 0x00000400 /* software: special page */ #define _PAGE_HPTE_SUB 0x0ffff000 /* combo only: sub pages HPTE bits */ #define _PAGE_HPTE_SUB0 0x08000000 /* combo only: first sub page */ #define _PAGE_COMBO 0x10000000 /* this is a combo 4k page */ diff --git a/include/asm-powerpc/pgtable-ppc32.h b/include/asm-powerpc/pgtable-ppc32.h index bdbab72..6fe39e3 100644 --- a/include/asm-powerpc/pgtable-ppc32.h +++ b/include/asm-powerpc/pgtable-ppc32.h @@ -401,6 +401,9 @@ extern int icache_44x_need_flush; #ifndef _PAGE_COHERENT #define _PAGE_COHERENT 0 #endif +#ifndef _PAGE_WRITETHRU +#define _PAGE_WRITETHRU 0 +#endif #ifndef _PMD_PRESENT_MASK #define _PMD_PRESENT_MASK _PMD_PRESENT #endif diff --git a/include/asm-powerpc/pgtable-ppc64.h b/include/asm-powerpc/pgtable-ppc64.h index ba80003..5fc78c0 100644 --- a/include/asm-powerpc/pgtable-ppc64.h +++ b/include/asm-powerpc/pgtable-ppc64.h @@ -245,7 +245,7 @@ static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW;} static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY;} static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED;} static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE;} -static inline int pte_special(pte_t pte) { return 0; } +static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; } static inline void pte_uncache(pte_t pte) { pte_val(pte) |= _PAGE_NO_CACHE; } static inline void pte_cache(pte_t pte) { pte_val(pte) &= ~_PAGE_NO_CACHE; } @@ -265,7 +265,7 @@ static inline pte_t pte_mkyoung(pte_t pte) { static inline pte_t pte_mkhuge(pte_t pte) { return pte; } static inline pte_t pte_mkspecial(pte_t pte) { - return pte; } + pte_val(pte) |= _PAGE_SPECIAL; return pte; } static inline unsigned long pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte)) & PAGE_PROT_BITS; diff --git a/include/asm-powerpc/ptrace.h b/include/asm-powerpc/ptrace.h index 3d6e310..734e075 100644 --- a/include/asm-powerpc/ptrace.h +++ b/include/asm-powerpc/ptrace.h @@ -84,6 +84,7 @@ struct pt_regs { #ifndef __ASSEMBLY__ #define instruction_pointer(regs) ((regs)->nip) +#define user_stack_pointer(regs) ((regs)->gpr[1]) #define regs_return_value(regs) ((regs)->gpr[3]) #ifdef CONFIG_SMP diff --git a/include/asm-powerpc/signal.h b/include/asm-powerpc/signal.h index a8c7bab..a7360cd 100644 --- a/include/asm-powerpc/signal.h +++ b/include/asm-powerpc/signal.h @@ -122,8 +122,7 @@ typedef struct sigaltstack { #ifdef __KERNEL__ struct pt_regs; -extern int do_signal(sigset_t *oldset, struct pt_regs *regs); -extern int do_signal32(sigset_t *oldset, struct pt_regs *regs); +extern void do_signal(struct pt_regs *regs, unsigned long thread_info_flags); #define ptrace_signal_deliver(regs, cookie) do { } while (0) #endif /* __KERNEL__ */ diff --git a/include/asm-powerpc/smp.h b/include/asm-powerpc/smp.h index 416d4c2..4d28e1e 100644 --- a/include/asm-powerpc/smp.h +++ b/include/asm-powerpc/smp.h @@ -62,6 +62,8 @@ extern int smp_hw_index[]; #endif DECLARE_PER_CPU(cpumask_t, cpu_sibling_map); +DECLARE_PER_CPU(cpumask_t, cpu_core_map); +extern int cpu_to_core_id(int cpu); /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. * diff --git a/include/asm-powerpc/syscall.h b/include/asm-powerpc/syscall.h new file mode 100644 index 0000000..efa7f0b --- /dev/null +++ b/include/asm-powerpc/syscall.h @@ -0,0 +1,84 @@ +/* + * Access to user system call parameters and results + * + * Copyright (C) 2008 Red Hat, Inc. All rights reserved. + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU General Public License v.2. + * + * See asm-generic/syscall.h for descriptions of what we must do here. + */ + +#ifndef _ASM_SYSCALL_H +#define _ASM_SYSCALL_H 1 + +#include <linux/sched.h> + +static inline long syscall_get_nr(struct task_struct *task, + struct pt_regs *regs) +{ + return TRAP(regs) == 0xc00 ? regs->gpr[0] : -1L; +} + +static inline void syscall_rollback(struct task_struct *task, + struct pt_regs *regs) +{ + regs->gpr[3] = regs->orig_gpr3; +} + +static inline long syscall_get_error(struct task_struct *task, + struct pt_regs *regs) +{ + return (regs->ccr & 0x1000) ? -regs->gpr[3] : 0; +} + +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->gpr[3]; +} + +static inline void syscall_set_return_value(struct task_struct *task, + struct pt_regs *regs, + int error, long val) +{ + if (error) { + regs->ccr |= 0x1000L; + regs->gpr[3] = -error; + } else { + regs->ccr &= ~0x1000L; + regs->gpr[3] = val; + } +} + +static inline void syscall_get_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + unsigned long *args) +{ + BUG_ON(i + n > 6); +#ifdef CONFIG_PPC64 + if (test_tsk_thread_flag(task, TIF_32BIT)) { + /* + * Zero-extend 32-bit argument values. The high bits are + * garbage ignored by the actual syscall dispatch. + */ + while (n-- > 0) + args[n] = (u32) regs->gpr[3 + i + n]; + return; + } +#endif + memcpy(args, ®s->gpr[3 + i], n * sizeof(args[0])); +} + +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + const unsigned long *args) +{ + BUG_ON(i + n > 6); + memcpy(®s->gpr[3 + i], args, n * sizeof(args[0])); +} + +#endif /* _ASM_SYSCALL_H */ diff --git a/include/asm-powerpc/thread_info.h b/include/asm-powerpc/thread_info.h index a9db562..9665a26 100644 --- a/include/asm-powerpc/thread_info.h +++ b/include/asm-powerpc/thread_info.h @@ -108,6 +108,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_SECCOMP 10 /* secure computing */ #define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */ #define TIF_NOERROR 12 /* Force successful syscall return */ +#define TIF_NOTIFY_RESUME 13 /* callback before returning to user */ #define TIF_FREEZE 14 /* Freezing for suspend */ #define TIF_RUNLATCH 15 /* Is the runlatch enabled? */ #define TIF_ABI_PENDING 16 /* 32/64 bit switch needed */ @@ -125,12 +126,14 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_SECCOMP (1<<TIF_SECCOMP) #define _TIF_RESTOREALL (1<<TIF_RESTOREALL) #define _TIF_NOERROR (1<<TIF_NOERROR) +#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) #define _TIF_FREEZE (1<<TIF_FREEZE) #define _TIF_RUNLATCH (1<<TIF_RUNLATCH) #define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING) #define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP) -#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED) +#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ + _TIF_NOTIFY_RESUME) #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR) /* Bits in local_flags */ diff --git a/include/asm-powerpc/topology.h b/include/asm-powerpc/topology.h index 100c6fb..c32da6f 100644 --- a/include/asm-powerpc/topology.h +++ b/include/asm-powerpc/topology.h @@ -108,6 +108,8 @@ static inline void sysfs_remove_device_from_node(struct sys_device *dev, #include <asm/smp.h> #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) +#define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) +#define topology_core_id(cpu) (cpu_to_core_id(cpu)) #endif #endif diff --git a/include/linux/of.h b/include/linux/of.h index 59a61bd..79886ad 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -70,5 +70,6 @@ extern int of_n_addr_cells(struct device_node *np); extern int of_n_size_cells(struct device_node *np); extern const struct of_device_id *of_match_node( const struct of_device_id *matches, const struct device_node *node); +extern int of_modalias_node(struct device_node *node, char *modalias, int len); #endif /* _LINUX_OF_H */ diff --git a/include/linux/of_spi.h b/include/linux/of_spi.h new file mode 100644 index 0000000..5f71ee8 --- /dev/null +++ b/include/linux/of_spi.h @@ -0,0 +1,18 @@ +/* + * OpenFirmware SPI support routines + * Copyright (C) 2008 Secret Lab Technologies Ltd. + * + * Support routines for deriving SPI device attachments from the device + * tree. + */ + +#ifndef __LINUX_OF_SPI_H +#define __LINUX_OF_SPI_H + +#include <linux/of.h> +#include <linux/spi/spi.h> + +extern void of_register_spi_devices(struct spi_master *master, + struct device_node *np); + +#endif /* __LINUX_OF_SPI */ diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index a9cc29d..4be01bb 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -778,8 +778,20 @@ spi_register_board_info(struct spi_board_info const *info, unsigned n) * use spi_new_device() to describe each device. You can also call * spi_unregister_device() to start making that device vanish, but * normally that would be handled by spi_unregister_master(). + * + * You can also use spi_alloc_device() and spi_add_device() to use a two + * stage registration sequence for each spi_device. This gives the caller + * some more control over the spi_device structure before it is registered, + * but requires that caller to initialize fields that would otherwise + * be defined using the board info. */ extern struct spi_device * +spi_alloc_device(struct spi_master *master); + +extern int +spi_add_device(struct spi_device *spi); + +extern struct spi_device * spi_new_device(struct spi_master *, struct spi_board_info *); static inline void |
