diff options
Diffstat (limited to 'arch/blackfin/include/asm/irq.h')
| -rw-r--r-- | arch/blackfin/include/asm/irq.h | 296 |
1 files changed, 256 insertions, 40 deletions
diff --git a/arch/blackfin/include/asm/irq.h b/arch/blackfin/include/asm/irq.h index 89f59e18af9..3d977909ce7 100644 --- a/arch/blackfin/include/asm/irq.h +++ b/arch/blackfin/include/asm/irq.h @@ -17,56 +17,272 @@ #ifndef _BFIN_IRQ_H_ #define _BFIN_IRQ_H_ +/* SYS_IRQS and NR_IRQS are defined in <mach-bf5xx/irq.h>*/ #include <mach/irq.h> -#include <asm/ptrace.h> - -/******************************************************************************* - ***** INTRODUCTION *********** - * On the Blackfin, the interrupt structure allows remmapping of the hardware - * levels. - * - I'm going to assume that the H/W level is going to stay at the default - * settings. If someone wants to go through and abstart this out, feel free - * to mod the interrupt numbering scheme. - * - I'm abstracting the interrupts so that uClinux does not know anything - * about the H/W levels. If you want to change the H/W AND keep the abstracted - * levels that uClinux sees, you should be able to do most of it here. - * - I've left the "abstract" numbering sparce in case someone wants to pull the - * interrupts apart (just the TX/RX for the various devices) - *******************************************************************************/ +#include <asm/pda.h> +#include <asm/processor.h> -/* SYS_IRQS and NR_IRQS are defined in <mach-bf5xx/irq.h>*/ +#ifdef CONFIG_SMP +/* Forward decl needed due to cdef inter dependencies */ +static inline uint32_t __pure bfin_dspid(void); +# define blackfin_core_id() (bfin_dspid() & 0xff) +# define bfin_irq_flags cpu_pda[blackfin_core_id()].imask +#else +extern unsigned long bfin_irq_flags; +#endif -/* - * Machine specific interrupt sources. - * - * Adding an interrupt service routine for a source with this bit - * set indicates a special machine specific interrupt source. - * The machine specific files define these sources. - * - * The IRQ_MACHSPEC bit is now gone - the only thing it did was to - * introduce unnecessary overhead. - * - * All interrupt handling is actually machine specific so it is better - * to use function pointers, as used by the Sparc port, and select the - * interrupt handling functions when initializing the kernel. This way - * we save some unnecessary overhead at run-time. - * 01/11/97 - Jes - */ +#ifdef CONFIG_IPIPE + +#include <linux/ipipe_trace.h> + +void __ipipe_unstall_root(void); + +void __ipipe_restore_root(unsigned long flags); + +#ifdef CONFIG_DEBUG_HWERR +# define __all_masked_irq_flags 0x3f +# define __save_and_cli_hw(x) \ + __asm__ __volatile__( \ + "cli %0;" \ + "sti %1;" \ + : "=&d"(x) \ + : "d" (0x3F) \ + ) +#else +# define __all_masked_irq_flags 0x1f +# define __save_and_cli_hw(x) \ + __asm__ __volatile__( \ + "cli %0;" \ + : "=&d"(x) \ + ) +#endif + +#define irqs_enabled_from_flags_hw(x) ((x) != __all_masked_irq_flags) +#define raw_irqs_disabled_flags(flags) (!irqs_enabled_from_flags_hw(flags)) +#define local_test_iflag_hw(x) irqs_enabled_from_flags_hw(x) -extern void ack_bad_irq(unsigned int irq); +#define local_save_flags(x) \ + do { \ + (x) = __ipipe_test_root() ? \ + __all_masked_irq_flags : bfin_irq_flags; \ + } while (0) -static __inline__ int irq_canonicalize(int irq) +#define local_irq_save(x) \ + do { \ + (x) = __ipipe_test_and_stall_root(); \ + } while (0) + +#define local_irq_restore(x) __ipipe_restore_root(x) +#define local_irq_disable() __ipipe_stall_root() +#define local_irq_enable() __ipipe_unstall_root() +#define irqs_disabled() __ipipe_test_root() + +#define local_save_flags_hw(x) \ + __asm__ __volatile__( \ + "cli %0;" \ + "sti %0;" \ + : "=d"(x) \ + ) + +#define irqs_disabled_hw() \ + ({ \ + unsigned long flags; \ + local_save_flags_hw(flags); \ + !irqs_enabled_from_flags_hw(flags); \ + }) + +static inline unsigned long raw_mangle_irq_bits(int virt, unsigned long real) { - return irq; + /* Merge virtual and real interrupt mask bits into a single + 32bit word. */ + return (real & ~(1 << 31)) | ((virt != 0) << 31); +} + +static inline int raw_demangle_irq_bits(unsigned long *x) +{ + int virt = (*x & (1 << 31)) != 0; + *x &= ~(1L << 31); + return virt; } -/* count of spurious interrupts */ -/* extern volatile unsigned int num_spurious; */ +#ifdef CONFIG_IPIPE_TRACE_IRQSOFF + +#define local_irq_disable_hw() \ + do { \ + int _tmp_dummy; \ + if (!irqs_disabled_hw()) \ + ipipe_trace_begin(0x80000000); \ + __asm__ __volatile__ ("cli %0;" : "=d" (_tmp_dummy) : ); \ + } while (0) + +#define local_irq_enable_hw() \ + do { \ + if (irqs_disabled_hw()) \ + ipipe_trace_end(0x80000000); \ + __asm__ __volatile__ ("sti %0;" : : "d"(bfin_irq_flags)); \ + } while (0) + +#define local_irq_save_hw(x) \ + do { \ + __save_and_cli_hw(x); \ + if (local_test_iflag_hw(x)) \ + ipipe_trace_begin(0x80000001); \ + } while (0) + +#define local_irq_restore_hw(x) \ + do { \ + if (local_test_iflag_hw(x)) { \ + ipipe_trace_end(0x80000001); \ + local_irq_enable_hw_notrace(); \ + } \ + } while (0) + +#define local_irq_disable_hw_notrace() \ + do { \ + int _tmp_dummy; \ + __asm__ __volatile__ ("cli %0;" : "=d" (_tmp_dummy) : ); \ + } while (0) + +#define local_irq_enable_hw_notrace() \ + __asm__ __volatile__( \ + "sti %0;" \ + : \ + : "d"(bfin_irq_flags) \ + ) -#ifndef NO_IRQ -#define NO_IRQ ((unsigned int)(-1)) +#define local_irq_save_hw_notrace(x) __save_and_cli_hw(x) + +#define local_irq_restore_hw_notrace(x) \ + do { \ + if (local_test_iflag_hw(x)) \ + local_irq_enable_hw_notrace(); \ + } while (0) + +#else /* CONFIG_IPIPE_TRACE_IRQSOFF */ + +#define local_irq_enable_hw() \ + __asm__ __volatile__( \ + "sti %0;" \ + : \ + : "d"(bfin_irq_flags) \ + ) + +#define local_irq_disable_hw() \ + do { \ + int _tmp_dummy; \ + __asm__ __volatile__ ( \ + "cli %0;" \ + : "=d" (_tmp_dummy)); \ + } while (0) + +#define local_irq_restore_hw(x) \ + do { \ + if (irqs_enabled_from_flags_hw(x)) \ + local_irq_enable_hw(); \ + } while (0) + +#define local_irq_save_hw(x) __save_and_cli_hw(x) + +#define local_irq_disable_hw_notrace() local_irq_disable_hw() +#define local_irq_enable_hw_notrace() local_irq_enable_hw() +#define local_irq_save_hw_notrace(x) local_irq_save_hw(x) +#define local_irq_restore_hw_notrace(x) local_irq_restore_hw(x) + +#endif /* CONFIG_IPIPE_TRACE_IRQSOFF */ + +#else /* !CONFIG_IPIPE */ + +/* + * Interrupt configuring macros. + */ +#define local_irq_disable() \ + do { \ + int __tmp_dummy; \ + __asm__ __volatile__( \ + "cli %0;" \ + : "=d" (__tmp_dummy) \ + ); \ + } while (0) + +#define local_irq_enable() \ + __asm__ __volatile__( \ + "sti %0;" \ + : \ + : "d" (bfin_irq_flags) \ + ) + +#ifdef CONFIG_DEBUG_HWERR +# define __save_and_cli(x) \ + __asm__ __volatile__( \ + "cli %0;" \ + "sti %1;" \ + : "=&d" (x) \ + : "d" (0x3F) \ + ) +#else +# define __save_and_cli(x) \ + __asm__ __volatile__( \ + "cli %0;" \ + : "=&d" (x) \ + ) #endif -#define SIC_SYSIRQ(irq) (irq - (IRQ_CORETMR + 1)) +#define local_save_flags(x) \ + __asm__ __volatile__( \ + "cli %0;" \ + "sti %0;" \ + : "=d" (x) \ + ) + +#ifdef CONFIG_DEBUG_HWERR +#define irqs_enabled_from_flags(x) (((x) & ~0x3f) != 0) +#else +#define irqs_enabled_from_flags(x) ((x) != 0x1f) +#endif + +#define local_irq_restore(x) \ + do { \ + if (irqs_enabled_from_flags(x)) \ + local_irq_enable(); \ + } while (0) + +/* For spinlocks etc */ +#define local_irq_save(x) __save_and_cli(x) + +#define irqs_disabled() \ +({ \ + unsigned long flags; \ + local_save_flags(flags); \ + !irqs_enabled_from_flags(flags); \ +}) + +#define local_irq_save_hw(x) local_irq_save(x) +#define local_irq_restore_hw(x) local_irq_restore(x) +#define local_irq_enable_hw() local_irq_enable() +#define local_irq_disable_hw() local_irq_disable() +#define irqs_disabled_hw() irqs_disabled() + +#endif /* !CONFIG_IPIPE */ + +#if ANOMALY_05000244 && defined(CONFIG_BFIN_ICACHE) +# define NOP_PAD_ANOMALY_05000244 "nop; nop;" +#else +# define NOP_PAD_ANOMALY_05000244 +#endif + +#define idle_with_irq_disabled() \ + __asm__ __volatile__( \ + NOP_PAD_ANOMALY_05000244 \ + ".align 8;" \ + "sti %0;" \ + "idle;" \ + : \ + : "d" (bfin_irq_flags) \ + ) + +static inline int irq_canonicalize(int irq) +{ + return irq; +} #endif /* _BFIN_IRQ_H_ */ |