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Diffstat (limited to 'include/asm-v850/gbus_int.h')
| -rw-r--r-- | include/asm-v850/gbus_int.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/include/asm-v850/gbus_int.h b/include/asm-v850/gbus_int.h new file mode 100644 index 00000000000..0c4bce753c7 --- /dev/null +++ b/include/asm-v850/gbus_int.h @@ -0,0 +1,97 @@ +/* + * include/asm-v850/gbus_int.h -- Midas labs GBUS interrupt support + * + * Copyright (C) 2001,02 NEC Corporation + * Copyright (C) 2001,02 Miles Bader <miles@gnu.org> + * + * 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. + * + * Written by Miles Bader <miles@gnu.org> + */ + +#ifndef __V850_GBUS_INT_H__ +#define __V850_GBUS_INT_H__ + + +/* The GBUS interrupt interface has 32 interrupts shared among 4 + processor interrupts. The 32 GBUS interrupts are divided into two + sets of 16 each, for allocating among control registers, etc (there + are two of each control register, with bits 0-15 controlling an + interrupt each). */ + +/* The GBUS interrupts themselves. */ +#define IRQ_GBUS_INT(n) (GBUS_INT_BASE_IRQ + (n)) +#define IRQ_GBUS_INT_NUM 32 + +/* Control registers. */ +#define GBUS_INT_STATUS_ADDR(w) (GBUS_INT_BASE_ADDR + (w)*0x40) +#define GBUS_INT_STATUS(w) (*(volatile u16 *)GBUS_INT_STATUS_ADDR(w)) +#define GBUS_INT_CLEAR_ADDR(w) (GBUS_INT_BASE_ADDR + 0x10 + (w)*0x40) +#define GBUS_INT_CLEAR(w) (*(volatile u16 *)GBUS_INT_CLEAR_ADDR(w)) +#define GBUS_INT_EDGE_ADDR(w) (GBUS_INT_BASE_ADDR + 0x20 + (w)*0x40) +#define GBUS_INT_EDGE(w) (*(volatile u16 *)GBUS_INT_EDGE_ADDR(w)) +#define GBUS_INT_POLARITY_ADDR(w) (GBUS_INT_BASE_ADDR + 0x30 + (w)*0x40) +#define GBUS_INT_POLARITY(w) (*(volatile u16 *)GBUS_INT_POLARITY_ADDR(w)) +/* This allows enabling interrupt bits in word W for interrupt GINTn. */ +#define GBUS_INT_ENABLE_ADDR(w, n) \ + (GBUS_INT_BASE_ADDR + 0x100 + (w)*0x10 + (n)*0x20) +#define GBUS_INT_ENABLE(w, n) (*(volatile u16 *)GBUS_INT_ENABLE_ADDR(w, n)) + +/* Mapping between kernel interrupt numbers and hardware control regs/bits. */ +#define GBUS_INT_BITS_PER_WORD 16 +#define GBUS_INT_NUM_WORDS (IRQ_GBUS_INT_NUM / GBUS_INT_BITS_PER_WORD) +#define GBUS_INT_IRQ_WORD(irq) (((irq) - GBUS_INT_BASE_IRQ) >> 4) +#define GBUS_INT_IRQ_BIT(irq) (((irq) - GBUS_INT_BASE_IRQ) & 0xF) +#define GBUS_INT_IRQ_MASK(irq) (1 << GBUS_INT_IRQ_BIT(irq)) + + +/* Possible priorities for GBUS interrupts. */ +#define GBUS_INT_PRIORITY_HIGH 2 +#define GBUS_INT_PRIORITY_MEDIUM 4 +#define GBUS_INT_PRIORITY_LOW 6 + + +#ifndef __ASSEMBLY__ + +/* Enable interrupt handling for interrupt IRQ. */ +extern void gbus_int_enable_irq (unsigned irq); +/* Disable interrupt handling for interrupt IRQ. Note that any + interrupts received while disabled will be delivered once the + interrupt is enabled again, unless they are explicitly cleared using + `gbus_int_clear_pending_irq'. */ +extern void gbus_int_disable_irq (unsigned irq); +/* Return true if interrupt handling for interrupt IRQ is enabled. */ +extern int gbus_int_irq_enabled (unsigned irq); +/* Disable all GBUS irqs. */ +extern void gbus_int_disable_irqs (void); +/* Clear any pending interrupts for IRQ. */ +extern void gbus_int_clear_pending_irq (unsigned irq); +/* Return true if interrupt IRQ is pending (but disabled). */ +extern int gbus_int_irq_pending (unsigned irq); + + +struct gbus_int_irq_init { + const char *name; /* name of interrupt type */ + + /* Range of kernel irq numbers for this type: + BASE, BASE+INTERVAL, ..., BASE+INTERVAL*NUM */ + unsigned base, num, interval; + + unsigned priority; /* interrupt priority to assign */ +}; +struct hw_interrupt_type; /* fwd decl */ + +/* Initialize HW_IRQ_TYPES for GBUS irqs described in array + INITS (which is terminated by an entry with the name field == 0). */ +extern void gbus_int_init_irq_types (struct gbus_int_irq_init *inits, + struct hw_interrupt_type *hw_irq_types); + +/* Initialize GBUS interrupts. */ +extern void gbus_int_init_irqs (void); + +#endif /* !__ASSEMBLY__ */ + + +#endif /* __V850_GBUS_INT_H__ */ |