diff options
Diffstat (limited to 'arch/ppc/syslib/open_pic2.c')
| -rw-r--r-- | arch/ppc/syslib/open_pic2.c | 710 |
1 files changed, 0 insertions, 710 deletions
diff --git a/arch/ppc/syslib/open_pic2.c b/arch/ppc/syslib/open_pic2.c deleted file mode 100644 index 449075a0479..00000000000 --- a/arch/ppc/syslib/open_pic2.c +++ /dev/null @@ -1,710 +0,0 @@ -/* - * Copyright (C) 1997 Geert Uytterhoeven - * - * 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. - * - * This is a duplicate of open_pic.c that deals with U3s MPIC on - * G5 PowerMacs. It's the same file except it's using big endian - * register accesses - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/sysdev.h> -#include <linux/errno.h> -#include <asm/ptrace.h> -#include <asm/signal.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/sections.h> -#include <asm/open_pic.h> -#include <asm/i8259.h> -#include <asm/machdep.h> - -#include "open_pic_defs.h" - -void *OpenPIC2_Addr; -static volatile struct OpenPIC *OpenPIC2 = NULL; -/* - * We define OpenPIC_InitSenses table thusly: - * bit 0x1: sense, 0 for edge and 1 for level. - * bit 0x2: polarity, 0 for negative, 1 for positive. - */ -extern u_int OpenPIC_NumInitSenses; -extern u_char *OpenPIC_InitSenses; -extern int use_of_interrupt_tree; - -static u_int NumProcessors; -static u_int NumSources; -static int open_pic2_irq_offset; -static volatile OpenPIC_Source *ISR[NR_IRQS]; - -/* Global Operations */ -static void openpic2_disable_8259_pass_through(void); -static void openpic2_set_priority(u_int pri); -static void openpic2_set_spurious(u_int vector); - -/* Timer Interrupts */ -static void openpic2_inittimer(u_int timer, u_int pri, u_int vector); -static void openpic2_maptimer(u_int timer, u_int cpumask); - -/* Interrupt Sources */ -static void openpic2_enable_irq(u_int irq); -static void openpic2_disable_irq(u_int irq); -static void openpic2_initirq(u_int irq, u_int pri, u_int vector, int polarity, - int is_level); -static void openpic2_mapirq(u_int irq, u_int cpumask, u_int keepmask); - -/* - * These functions are not used but the code is kept here - * for completeness and future reference. - */ -static void openpic2_reset(void); -#ifdef notused -static void openpic2_enable_8259_pass_through(void); -static u_int openpic2_get_priority(void); -static u_int openpic2_get_spurious(void); -static void openpic2_set_sense(u_int irq, int sense); -#endif /* notused */ - -/* - * Description of the openpic for the higher-level irq code - */ -static void openpic2_end_irq(unsigned int irq_nr); -static void openpic2_ack_irq(unsigned int irq_nr); - -struct hw_interrupt_type open_pic2 = { - .typename = " OpenPIC2 ", - .enable = openpic2_enable_irq, - .disable = openpic2_disable_irq, - .ack = openpic2_ack_irq, - .end = openpic2_end_irq, -}; - -/* - * Accesses to the current processor's openpic registers - * On cascaded controller, this is only CPU 0 - */ -#define THIS_CPU Processor[0] -#define DECL_THIS_CPU -#define CHECK_THIS_CPU - -#if 1 -#define check_arg_ipi(ipi) \ - if (ipi < 0 || ipi >= OPENPIC_NUM_IPI) \ - printk("open_pic.c:%d: illegal ipi %d\n", __LINE__, ipi); -#define check_arg_timer(timer) \ - if (timer < 0 || timer >= OPENPIC_NUM_TIMERS) \ - printk("open_pic.c:%d: illegal timer %d\n", __LINE__, timer); -#define check_arg_vec(vec) \ - if (vec < 0 || vec >= OPENPIC_NUM_VECTORS) \ - printk("open_pic.c:%d: illegal vector %d\n", __LINE__, vec); -#define check_arg_pri(pri) \ - if (pri < 0 || pri >= OPENPIC_NUM_PRI) \ - printk("open_pic.c:%d: illegal priority %d\n", __LINE__, pri); -/* - * Print out a backtrace if it's out of range, since if it's larger than NR_IRQ's - * data has probably been corrupted and we're going to panic or deadlock later - * anyway --Troy - */ -extern unsigned long* _get_SP(void); -#define check_arg_irq(irq) \ - if (irq < open_pic2_irq_offset || irq >= NumSources+open_pic2_irq_offset \ - || ISR[irq - open_pic2_irq_offset] == 0) { \ - printk("open_pic.c:%d: illegal irq %d\n", __LINE__, irq); \ - /*print_backtrace(_get_SP());*/ } -#define check_arg_cpu(cpu) \ - if (cpu < 0 || cpu >= NumProcessors){ \ - printk("open_pic2.c:%d: illegal cpu %d\n", __LINE__, cpu); \ - /*print_backtrace(_get_SP());*/ } -#else -#define check_arg_ipi(ipi) do {} while (0) -#define check_arg_timer(timer) do {} while (0) -#define check_arg_vec(vec) do {} while (0) -#define check_arg_pri(pri) do {} while (0) -#define check_arg_irq(irq) do {} while (0) -#define check_arg_cpu(cpu) do {} while (0) -#endif - -static u_int openpic2_read(volatile u_int *addr) -{ - u_int val; - - val = in_be32(addr); - return val; -} - -static inline void openpic2_write(volatile u_int *addr, u_int val) -{ - out_be32(addr, val); -} - -static inline u_int openpic2_readfield(volatile u_int *addr, u_int mask) -{ - u_int val = openpic2_read(addr); - return val & mask; -} - -inline void openpic2_writefield(volatile u_int *addr, u_int mask, - u_int field) -{ - u_int val = openpic2_read(addr); - openpic2_write(addr, (val & ~mask) | (field & mask)); -} - -static inline void openpic2_clearfield(volatile u_int *addr, u_int mask) -{ - openpic2_writefield(addr, mask, 0); -} - -static inline void openpic2_setfield(volatile u_int *addr, u_int mask) -{ - openpic2_writefield(addr, mask, mask); -} - -static void openpic2_safe_writefield(volatile u_int *addr, u_int mask, - u_int field) -{ - openpic2_setfield(addr, OPENPIC_MASK); - while (openpic2_read(addr) & OPENPIC_ACTIVITY); - openpic2_writefield(addr, mask | OPENPIC_MASK, field | OPENPIC_MASK); -} - -static void openpic2_reset(void) -{ - openpic2_setfield(&OpenPIC2->Global.Global_Configuration0, - OPENPIC_CONFIG_RESET); - while (openpic2_readfield(&OpenPIC2->Global.Global_Configuration0, - OPENPIC_CONFIG_RESET)) - mb(); -} - -void __init openpic2_set_sources(int first_irq, int num_irqs, void *first_ISR) -{ - volatile OpenPIC_Source *src = first_ISR; - int i, last_irq; - - last_irq = first_irq + num_irqs; - if (last_irq > NumSources) - NumSources = last_irq; - if (src == 0) - src = &((struct OpenPIC *)OpenPIC2_Addr)->Source[first_irq]; - for (i = first_irq; i < last_irq; ++i, ++src) - ISR[i] = src; -} - -/* - * The `offset' parameter defines where the interrupts handled by the - * OpenPIC start in the space of interrupt numbers that the kernel knows - * about. In other words, the OpenPIC's IRQ0 is numbered `offset' in the - * kernel's interrupt numbering scheme. - * We assume there is only one OpenPIC. - */ -void __init openpic2_init(int offset) -{ - u_int t, i; - u_int timerfreq; - const char *version; - - if (!OpenPIC2_Addr) { - printk("No OpenPIC2 found !\n"); - return; - } - OpenPIC2 = (volatile struct OpenPIC *)OpenPIC2_Addr; - - if (ppc_md.progress) ppc_md.progress("openpic: enter", 0x122); - - t = openpic2_read(&OpenPIC2->Global.Feature_Reporting0); - switch (t & OPENPIC_FEATURE_VERSION_MASK) { - case 1: - version = "1.0"; - break; - case 2: - version = "1.2"; - break; - case 3: - version = "1.3"; - break; - default: - version = "?"; - break; - } - NumProcessors = ((t & OPENPIC_FEATURE_LAST_PROCESSOR_MASK) >> - OPENPIC_FEATURE_LAST_PROCESSOR_SHIFT) + 1; - if (NumSources == 0) - openpic2_set_sources(0, - ((t & OPENPIC_FEATURE_LAST_SOURCE_MASK) >> - OPENPIC_FEATURE_LAST_SOURCE_SHIFT) + 1, - NULL); - printk("OpenPIC (2) Version %s (%d CPUs and %d IRQ sources) at %p\n", - version, NumProcessors, NumSources, OpenPIC2); - timerfreq = openpic2_read(&OpenPIC2->Global.Timer_Frequency); - if (timerfreq) - printk("OpenPIC timer frequency is %d.%06d MHz\n", - timerfreq / 1000000, timerfreq % 1000000); - - open_pic2_irq_offset = offset; - - /* Initialize timer interrupts */ - if ( ppc_md.progress ) ppc_md.progress("openpic2: timer",0x3ba); - for (i = 0; i < OPENPIC_NUM_TIMERS; i++) { - /* Disabled, Priority 0 */ - openpic2_inittimer(i, 0, OPENPIC2_VEC_TIMER+i+offset); - /* No processor */ - openpic2_maptimer(i, 0); - } - - /* Initialize external interrupts */ - if (ppc_md.progress) ppc_md.progress("openpic2: external",0x3bc); - - openpic2_set_priority(0xf); - - /* Init all external sources, including possibly the cascade. */ - for (i = 0; i < NumSources; i++) { - int sense; - - if (ISR[i] == 0) - continue; - - /* the bootloader may have left it enabled (bad !) */ - openpic2_disable_irq(i+offset); - - sense = (i < OpenPIC_NumInitSenses)? OpenPIC_InitSenses[i]: \ - (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE); - - if (sense & IRQ_SENSE_MASK) - irq_desc[i+offset].status = IRQ_LEVEL; - - /* Enabled, Priority 8 */ - openpic2_initirq(i, 8, i+offset, (sense & IRQ_POLARITY_MASK), - (sense & IRQ_SENSE_MASK)); - /* Processor 0 */ - openpic2_mapirq(i, 1<<0, 0); - } - - /* Init descriptors */ - for (i = offset; i < NumSources + offset; i++) - irq_desc[i].chip = &open_pic2; - - /* Initialize the spurious interrupt */ - if (ppc_md.progress) ppc_md.progress("openpic2: spurious",0x3bd); - openpic2_set_spurious(OPENPIC2_VEC_SPURIOUS+offset); - - openpic2_disable_8259_pass_through(); - openpic2_set_priority(0); - - if (ppc_md.progress) ppc_md.progress("openpic2: exit",0x222); -} - -#ifdef notused -static void openpic2_enable_8259_pass_through(void) -{ - openpic2_clearfield(&OpenPIC2->Global.Global_Configuration0, - OPENPIC_CONFIG_8259_PASSTHROUGH_DISABLE); -} -#endif /* notused */ - -/* This can't be __init, it is used in openpic_sleep_restore_intrs */ -static void openpic2_disable_8259_pass_through(void) -{ - openpic2_setfield(&OpenPIC2->Global.Global_Configuration0, - OPENPIC_CONFIG_8259_PASSTHROUGH_DISABLE); -} - -/* - * Find out the current interrupt - */ -u_int openpic2_irq(void) -{ - u_int vec; - DECL_THIS_CPU; - - CHECK_THIS_CPU; - vec = openpic2_readfield(&OpenPIC2->THIS_CPU.Interrupt_Acknowledge, - OPENPIC_VECTOR_MASK); - return vec; -} - -void openpic2_eoi(void) -{ - DECL_THIS_CPU; - - CHECK_THIS_CPU; - openpic2_write(&OpenPIC2->THIS_CPU.EOI, 0); - /* Handle PCI write posting */ - (void)openpic2_read(&OpenPIC2->THIS_CPU.EOI); -} - -#ifdef notused -static u_int openpic2_get_priority(void) -{ - DECL_THIS_CPU; - - CHECK_THIS_CPU; - return openpic2_readfield(&OpenPIC2->THIS_CPU.Current_Task_Priority, - OPENPIC_CURRENT_TASK_PRIORITY_MASK); -} -#endif /* notused */ - -static void __init openpic2_set_priority(u_int pri) -{ - DECL_THIS_CPU; - - CHECK_THIS_CPU; - check_arg_pri(pri); - openpic2_writefield(&OpenPIC2->THIS_CPU.Current_Task_Priority, - OPENPIC_CURRENT_TASK_PRIORITY_MASK, pri); -} - -/* - * Get/set the spurious vector - */ -#ifdef notused -static u_int openpic2_get_spurious(void) -{ - return openpic2_readfield(&OpenPIC2->Global.Spurious_Vector, - OPENPIC_VECTOR_MASK); -} -#endif /* notused */ - -/* This can't be __init, it is used in openpic_sleep_restore_intrs */ -static void openpic2_set_spurious(u_int vec) -{ - check_arg_vec(vec); - openpic2_writefield(&OpenPIC2->Global.Spurious_Vector, OPENPIC_VECTOR_MASK, - vec); -} - -static DEFINE_SPINLOCK(openpic2_setup_lock); - -/* - * Initialize a timer interrupt (and disable it) - * - * timer: OpenPIC timer number - * pri: interrupt source priority - * vec: the vector it will produce - */ -static void __init openpic2_inittimer(u_int timer, u_int pri, u_int vec) -{ - check_arg_timer(timer); - check_arg_pri(pri); - check_arg_vec(vec); - openpic2_safe_writefield(&OpenPIC2->Global.Timer[timer].Vector_Priority, - OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK, - (pri << OPENPIC_PRIORITY_SHIFT) | vec); -} - -/* - * Map a timer interrupt to one or more CPUs - */ -static void __init openpic2_maptimer(u_int timer, u_int cpumask) -{ - check_arg_timer(timer); - openpic2_write(&OpenPIC2->Global.Timer[timer].Destination, - cpumask); -} - -/* - * Initalize the interrupt source which will generate an NMI. - * This raises the interrupt's priority from 8 to 9. - * - * irq: The logical IRQ which generates an NMI. - */ -void __init -openpic2_init_nmi_irq(u_int irq) -{ - check_arg_irq(irq); - openpic2_safe_writefield(&ISR[irq - open_pic2_irq_offset]->Vector_Priority, - OPENPIC_PRIORITY_MASK, - 9 << OPENPIC_PRIORITY_SHIFT); -} - -/* - * - * All functions below take an offset'ed irq argument - * - */ - - -/* - * Enable/disable an external interrupt source - * - * Externally called, irq is an offseted system-wide interrupt number - */ -static void openpic2_enable_irq(u_int irq) -{ - volatile u_int *vpp; - - check_arg_irq(irq); - vpp = &ISR[irq - open_pic2_irq_offset]->Vector_Priority; - openpic2_clearfield(vpp, OPENPIC_MASK); - /* make sure mask gets to controller before we return to user */ - do { - mb(); /* sync is probably useless here */ - } while (openpic2_readfield(vpp, OPENPIC_MASK)); -} - -static void openpic2_disable_irq(u_int irq) -{ - volatile u_int *vpp; - u32 vp; - - check_arg_irq(irq); - vpp = &ISR[irq - open_pic2_irq_offset]->Vector_Priority; - openpic2_setfield(vpp, OPENPIC_MASK); - /* make sure mask gets to controller before we return to user */ - do { - mb(); /* sync is probably useless here */ - vp = openpic2_readfield(vpp, OPENPIC_MASK | OPENPIC_ACTIVITY); - } while((vp & OPENPIC_ACTIVITY) && !(vp & OPENPIC_MASK)); -} - - -/* - * Initialize an interrupt source (and disable it!) - * - * irq: OpenPIC interrupt number - * pri: interrupt source priority - * vec: the vector it will produce - * pol: polarity (1 for positive, 0 for negative) - * sense: 1 for level, 0 for edge - */ -static void __init -openpic2_initirq(u_int irq, u_int pri, u_int vec, int pol, int sense) -{ - openpic2_safe_writefield(&ISR[irq]->Vector_Priority, - OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK | - OPENPIC_SENSE_MASK | OPENPIC_POLARITY_MASK, - (pri << OPENPIC_PRIORITY_SHIFT) | vec | - (pol ? OPENPIC_POLARITY_POSITIVE : - OPENPIC_POLARITY_NEGATIVE) | - (sense ? OPENPIC_SENSE_LEVEL : OPENPIC_SENSE_EDGE)); -} - -/* - * Map an interrupt source to one or more CPUs - */ -static void openpic2_mapirq(u_int irq, u_int physmask, u_int keepmask) -{ - if (ISR[irq] == 0) - return; - if (keepmask != 0) - physmask |= openpic2_read(&ISR[irq]->Destination) & keepmask; - openpic2_write(&ISR[irq]->Destination, physmask); -} - -#ifdef notused -/* - * Set the sense for an interrupt source (and disable it!) - * - * sense: 1 for level, 0 for edge - */ -static void openpic2_set_sense(u_int irq, int sense) -{ - if (ISR[irq] != 0) - openpic2_safe_writefield(&ISR[irq]->Vector_Priority, - OPENPIC_SENSE_LEVEL, - (sense ? OPENPIC_SENSE_LEVEL : 0)); -} -#endif /* notused */ - -/* No spinlocks, should not be necessary with the OpenPIC - * (1 register = 1 interrupt and we have the desc lock). - */ -static void openpic2_ack_irq(unsigned int irq_nr) -{ - openpic2_disable_irq(irq_nr); - openpic2_eoi(); -} - -static void openpic2_end_irq(unsigned int irq_nr) -{ - if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))) - openpic2_enable_irq(irq_nr); -} - -int -openpic2_get_irq(void) -{ - int irq = openpic2_irq(); - - if (irq == (OPENPIC2_VEC_SPURIOUS + open_pic2_irq_offset)) - irq = -1; - return irq; -} - -#ifdef CONFIG_PM - -/* - * We implement the IRQ controller as a sysdev and put it - * to sleep at powerdown stage (the callback is named suspend, - * but it's old semantics, for the Device Model, it's really - * powerdown). The possible problem is that another sysdev that - * happens to be suspend after this one will have interrupts off, - * that may be an issue... For now, this isn't an issue on pmac - * though... - */ - -static u32 save_ipi_vp[OPENPIC_NUM_IPI]; -static u32 save_irq_src_vp[OPENPIC_MAX_SOURCES]; -static u32 save_irq_src_dest[OPENPIC_MAX_SOURCES]; -static u32 save_cpu_task_pri[OPENPIC_MAX_PROCESSORS]; -static int openpic_suspend_count; - -static void openpic2_cached_enable_irq(u_int irq) -{ - check_arg_irq(irq); - save_irq_src_vp[irq - open_pic2_irq_offset] &= ~OPENPIC_MASK; -} - -static void openpic2_cached_disable_irq(u_int irq) -{ - check_arg_irq(irq); - save_irq_src_vp[irq - open_pic2_irq_offset] |= OPENPIC_MASK; -} - -/* WARNING: Can be called directly by the cpufreq code with NULL parameter, - * we need something better to deal with that... Maybe switch to S1 for - * cpufreq changes - */ -int openpic2_suspend(struct sys_device *sysdev, pm_message_t state) -{ - int i; - unsigned long flags; - - spin_lock_irqsave(&openpic2_setup_lock, flags); - - if (openpic_suspend_count++ > 0) { - spin_unlock_irqrestore(&openpic2_setup_lock, flags); - return 0; - } - - open_pic2.enable = openpic2_cached_enable_irq; - open_pic2.disable = openpic2_cached_disable_irq; - - for (i=0; i<NumProcessors; i++) { - save_cpu_task_pri[i] = openpic2_read(&OpenPIC2->Processor[i].Current_Task_Priority); - openpic2_writefield(&OpenPIC2->Processor[i].Current_Task_Priority, - OPENPIC_CURRENT_TASK_PRIORITY_MASK, 0xf); - } - - for (i=0; i<OPENPIC_NUM_IPI; i++) - save_ipi_vp[i] = openpic2_read(&OpenPIC2->Global.IPI_Vector_Priority(i)); - for (i=0; i<NumSources; i++) { - if (ISR[i] == 0) - continue; - save_irq_src_vp[i] = openpic2_read(&ISR[i]->Vector_Priority) & ~OPENPIC_ACTIVITY; - save_irq_src_dest[i] = openpic2_read(&ISR[i]->Destination); - } - - spin_unlock_irqrestore(&openpic2_setup_lock, flags); - - return 0; -} - -/* WARNING: Can be called directly by the cpufreq code with NULL parameter, - * we need something better to deal with that... Maybe switch to S1 for - * cpufreq changes - */ -int openpic2_resume(struct sys_device *sysdev) -{ - int i; - unsigned long flags; - u32 vppmask = OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK | - OPENPIC_SENSE_MASK | OPENPIC_POLARITY_MASK | - OPENPIC_MASK; - - spin_lock_irqsave(&openpic2_setup_lock, flags); - - if ((--openpic_suspend_count) > 0) { - spin_unlock_irqrestore(&openpic2_setup_lock, flags); - return 0; - } - - openpic2_reset(); - - /* OpenPIC sometimes seem to need some time to be fully back up... */ - do { - openpic2_set_spurious(OPENPIC2_VEC_SPURIOUS+open_pic2_irq_offset); - } while(openpic2_readfield(&OpenPIC2->Global.Spurious_Vector, OPENPIC_VECTOR_MASK) - != (OPENPIC2_VEC_SPURIOUS + open_pic2_irq_offset)); - - openpic2_disable_8259_pass_through(); - - for (i=0; i<OPENPIC_NUM_IPI; i++) - openpic2_write(&OpenPIC2->Global.IPI_Vector_Priority(i), - save_ipi_vp[i]); - for (i=0; i<NumSources; i++) { - if (ISR[i] == 0) - continue; - openpic2_write(&ISR[i]->Destination, save_irq_src_dest[i]); - openpic2_write(&ISR[i]->Vector_Priority, save_irq_src_vp[i]); - /* make sure mask gets to controller before we return to user */ - do { - openpic2_write(&ISR[i]->Vector_Priority, save_irq_src_vp[i]); - } while (openpic2_readfield(&ISR[i]->Vector_Priority, vppmask) - != (save_irq_src_vp[i] & vppmask)); - } - for (i=0; i<NumProcessors; i++) - openpic2_write(&OpenPIC2->Processor[i].Current_Task_Priority, - save_cpu_task_pri[i]); - - open_pic2.enable = openpic2_enable_irq; - open_pic2.disable = openpic2_disable_irq; - - spin_unlock_irqrestore(&openpic2_setup_lock, flags); - - return 0; -} - -#endif /* CONFIG_PM */ - -/* HACK ALERT */ -static struct sysdev_class openpic2_sysclass = { - .name = "openpic2", -}; - -static struct sys_device device_openpic2 = { - .id = 0, - .cls = &openpic2_sysclass, -}; - -static struct sysdev_driver driver_openpic2 = { -#ifdef CONFIG_PM - .suspend = &openpic2_suspend, - .resume = &openpic2_resume, -#endif /* CONFIG_PM */ -}; - -static int __init init_openpic2_sysfs(void) -{ - int rc; - - if (!OpenPIC2_Addr) - return -ENODEV; - printk(KERN_DEBUG "Registering openpic2 with sysfs...\n"); - rc = sysdev_class_register(&openpic2_sysclass); - if (rc) { - printk(KERN_ERR "Failed registering openpic sys class\n"); - return -ENODEV; - } - rc = sysdev_register(&device_openpic2); - if (rc) { - printk(KERN_ERR "Failed registering openpic sys device\n"); - return -ENODEV; - } - rc = sysdev_driver_register(&openpic2_sysclass, &driver_openpic2); - if (rc) { - printk(KERN_ERR "Failed registering openpic sys driver\n"); - return -ENODEV; - } - return 0; -} - -subsys_initcall(init_openpic2_sysfs); - |