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31521a7a64
kernel-ark/arch/mips/include/asm/gic.h
Jeffrey Deans 31521a7a64 MIPS: GIC: Generalise check for pending interrupts 
Move most of the functionality of gic_get_int() into a new function
gic_get_int_mask() which takes a bitmask of interrupts in which the
caller is interested, and returns the subset which are pending for the
current CPU.

This allows CP0 IRQ dispatch routines to check only the GIC interrupts
which are routed to a particular CPU interrupt input.

gic_get_int() is reimplemented using gic_get_int_mask() and is retained
for use by any platforms for which gic_get_int() is sufficient.

Signed-off-by: Jeffrey Deans <jeffrey.deans@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7376/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-08-02 00:06:41 +02:00

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/*
* 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.
*
* Copyright (C) 2000, 07 MIPS Technologies, Inc.
*
* GIC Register Definitions
*
*/
#ifndef _ASM_GICREGS_H
#define _ASM_GICREGS_H
#include <linux/bitmap.h>
#include <linux/threads.h>
#include <irq.h>
#undef GICISBYTELITTLEENDIAN
/* Constants */
#define GIC_POL_POS 1
#define GIC_POL_NEG 0
#define GIC_TRIG_EDGE 1
#define GIC_TRIG_LEVEL 0
#define MSK(n) ((1 << (n)) - 1)
#define REG32(addr) (*(volatile unsigned int *) (addr))
#define REG(base, offs) REG32((unsigned long)(base) + offs##_##OFS)
#define REGP(base, phys) REG32((unsigned long)(base) + (phys))
/* Accessors */
#define GIC_REG(segment, offset) \
REG32(_gic_base + segment##_##SECTION_OFS + offset##_##OFS)
#define GIC_REG_ADDR(segment, offset) \
REG32(_gic_base + segment##_##SECTION_OFS + offset)
#define GIC_ABS_REG(segment, offset) \
(_gic_base + segment##_##SECTION_OFS + offset##_##OFS)
#define GIC_REG_ABS_ADDR(segment, offset) \
(_gic_base + segment##_##SECTION_OFS + offset)
#ifdef GICISBYTELITTLEENDIAN
#define GICREAD(reg, data) ((data) = (reg), (data) = le32_to_cpu(data))
#define GICWRITE(reg, data) ((reg) = cpu_to_le32(data))
#define GICBIS(reg, bits) \
({unsigned int data; \
GICREAD(reg, data); \
data |= bits; \
GICWRITE(reg, data); \
})
#else
#define GICREAD(reg, data) ((data) = (reg))
#define GICWRITE(reg, data) ((reg) = (data))
#define GICBIS(reg, bits) ((reg) |= (bits))
#endif
/* GIC Address Space */
#define SHARED_SECTION_OFS 0x0000
#define SHARED_SECTION_SIZE 0x8000
#define VPE_LOCAL_SECTION_OFS 0x8000
#define VPE_LOCAL_SECTION_SIZE 0x4000
#define VPE_OTHER_SECTION_OFS 0xc000
#define VPE_OTHER_SECTION_SIZE 0x4000
#define USM_VISIBLE_SECTION_OFS 0x10000
#define USM_VISIBLE_SECTION_SIZE 0x10000
/* Register Map for Shared Section */
#define GIC_SH_CONFIG_OFS 0x0000
/* Shared Global Counter */
#define GIC_SH_COUNTER_31_00_OFS 0x0010
#define GIC_SH_COUNTER_63_32_OFS 0x0014
#define GIC_SH_REVISIONID_OFS 0x0020
/* Interrupt Polarity */
#define GIC_SH_POL_31_0_OFS 0x0100
#define GIC_SH_POL_63_32_OFS 0x0104
#define GIC_SH_POL_95_64_OFS 0x0108
#define GIC_SH_POL_127_96_OFS 0x010c
#define GIC_SH_POL_159_128_OFS 0x0110
#define GIC_SH_POL_191_160_OFS 0x0114
#define GIC_SH_POL_223_192_OFS 0x0118
#define GIC_SH_POL_255_224_OFS 0x011c
/* Edge/Level Triggering */
#define GIC_SH_TRIG_31_0_OFS 0x0180
#define GIC_SH_TRIG_63_32_OFS 0x0184
#define GIC_SH_TRIG_95_64_OFS 0x0188
#define GIC_SH_TRIG_127_96_OFS 0x018c
#define GIC_SH_TRIG_159_128_OFS 0x0190
#define GIC_SH_TRIG_191_160_OFS 0x0194
#define GIC_SH_TRIG_223_192_OFS 0x0198
#define GIC_SH_TRIG_255_224_OFS 0x019c
/* Dual Edge Triggering */
#define GIC_SH_DUAL_31_0_OFS 0x0200
#define GIC_SH_DUAL_63_32_OFS 0x0204
#define GIC_SH_DUAL_95_64_OFS 0x0208
#define GIC_SH_DUAL_127_96_OFS 0x020c
#define GIC_SH_DUAL_159_128_OFS 0x0210
#define GIC_SH_DUAL_191_160_OFS 0x0214
#define GIC_SH_DUAL_223_192_OFS 0x0218
#define GIC_SH_DUAL_255_224_OFS 0x021c
/* Set/Clear corresponding bit in Edge Detect Register */
#define GIC_SH_WEDGE_OFS 0x0280
/* Reset Mask - Disables Interrupt */
#define GIC_SH_RMASK_31_0_OFS 0x0300
#define GIC_SH_RMASK_63_32_OFS 0x0304
#define GIC_SH_RMASK_95_64_OFS 0x0308
#define GIC_SH_RMASK_127_96_OFS 0x030c
#define GIC_SH_RMASK_159_128_OFS 0x0310
#define GIC_SH_RMASK_191_160_OFS 0x0314
#define GIC_SH_RMASK_223_192_OFS 0x0318
#define GIC_SH_RMASK_255_224_OFS 0x031c
/* Set Mask (WO) - Enables Interrupt */
#define GIC_SH_SMASK_31_0_OFS 0x0380
#define GIC_SH_SMASK_63_32_OFS 0x0384
#define GIC_SH_SMASK_95_64_OFS 0x0388
#define GIC_SH_SMASK_127_96_OFS 0x038c
#define GIC_SH_SMASK_159_128_OFS 0x0390
#define GIC_SH_SMASK_191_160_OFS 0x0394
#define GIC_SH_SMASK_223_192_OFS 0x0398
#define GIC_SH_SMASK_255_224_OFS 0x039c
/* Global Interrupt Mask Register (RO) - Bit Set == Interrupt enabled */
#define GIC_SH_MASK_31_0_OFS 0x0400
#define GIC_SH_MASK_63_32_OFS 0x0404
#define GIC_SH_MASK_95_64_OFS 0x0408
#define GIC_SH_MASK_127_96_OFS 0x040c
#define GIC_SH_MASK_159_128_OFS 0x0410
#define GIC_SH_MASK_191_160_OFS 0x0414
#define GIC_SH_MASK_223_192_OFS 0x0418
#define GIC_SH_MASK_255_224_OFS 0x041c
/* Pending Global Interrupts (RO) */
#define GIC_SH_PEND_31_0_OFS 0x0480
#define GIC_SH_PEND_63_32_OFS 0x0484
#define GIC_SH_PEND_95_64_OFS 0x0488
#define GIC_SH_PEND_127_96_OFS 0x048c
#define GIC_SH_PEND_159_128_OFS 0x0490
#define GIC_SH_PEND_191_160_OFS 0x0494
#define GIC_SH_PEND_223_192_OFS 0x0498
#define GIC_SH_PEND_255_224_OFS 0x049c
#define GIC_SH_INTR_MAP_TO_PIN_BASE_OFS 0x0500
/* Maps Interrupt X to a Pin */
#define GIC_SH_MAP_TO_PIN(intr) \
(GIC_SH_INTR_MAP_TO_PIN_BASE_OFS + (4 * intr))
#define GIC_SH_INTR_MAP_TO_VPE_BASE_OFS 0x2000
/* Maps Interrupt X to a VPE */
#define GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe) \
(GIC_SH_INTR_MAP_TO_VPE_BASE_OFS + (32 * (intr)) + (((vpe) / 32) * 4))
#define GIC_SH_MAP_TO_VPE_REG_BIT(vpe) (1 << ((vpe) % 32))
/* Convert an interrupt number to a byte offset/bit for multi-word registers */
#define GIC_INTR_OFS(intr) (((intr) / 32)*4)
#define GIC_INTR_BIT(intr) ((intr) % 32)
/* Polarity : Reset Value is always 0 */
#define GIC_SH_SET_POLARITY_OFS 0x0100
#define GIC_SET_POLARITY(intr, pol) \
GICBIS(GIC_REG_ADDR(SHARED, GIC_SH_SET_POLARITY_OFS + \
GIC_INTR_OFS(intr)), (pol) << GIC_INTR_BIT(intr))
/* Triggering : Reset Value is always 0 */
#define GIC_SH_SET_TRIGGER_OFS 0x0180
#define GIC_SET_TRIGGER(intr, trig) \
GICBIS(GIC_REG_ADDR(SHARED, GIC_SH_SET_TRIGGER_OFS + \
GIC_INTR_OFS(intr)), (trig) << GIC_INTR_BIT(intr))
/* Mask manipulation */
#define GIC_SH_SMASK_OFS 0x0380
#define GIC_SET_INTR_MASK(intr) \
GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_SMASK_OFS + \
GIC_INTR_OFS(intr)), 1 << GIC_INTR_BIT(intr))
#define GIC_SH_RMASK_OFS 0x0300
#define GIC_CLR_INTR_MASK(intr) \
GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_RMASK_OFS + \
GIC_INTR_OFS(intr)), 1 << GIC_INTR_BIT(intr))
/* Register Map for Local Section */
#define GIC_VPE_CTL_OFS 0x0000
#define GIC_VPE_PEND_OFS 0x0004
#define GIC_VPE_MASK_OFS 0x0008
#define GIC_VPE_RMASK_OFS 0x000c
#define GIC_VPE_SMASK_OFS 0x0010
#define GIC_VPE_WD_MAP_OFS 0x0040
#define GIC_VPE_COMPARE_MAP_OFS 0x0044
#define GIC_VPE_TIMER_MAP_OFS 0x0048
#define GIC_VPE_PERFCTR_MAP_OFS 0x0050
#define GIC_VPE_SWINT0_MAP_OFS 0x0054
#define GIC_VPE_SWINT1_MAP_OFS 0x0058
#define GIC_VPE_OTHER_ADDR_OFS 0x0080
#define GIC_VPE_WD_CONFIG0_OFS 0x0090
#define GIC_VPE_WD_COUNT0_OFS 0x0094
#define GIC_VPE_WD_INITIAL0_OFS 0x0098
#define GIC_VPE_COMPARE_LO_OFS 0x00a0
#define GIC_VPE_COMPARE_HI_OFS 0x00a4
#define GIC_VPE_EIC_SHADOW_SET_BASE 0x0100
#define GIC_VPE_EIC_SS(intr) \
(GIC_VPE_EIC_SHADOW_SET_BASE + (4 * intr))
#define GIC_VPE_EIC_VEC_BASE 0x0800
#define GIC_VPE_EIC_VEC(intr) \
(GIC_VPE_EIC_VEC_BASE + (4 * intr))
#define GIC_VPE_TENABLE_NMI_OFS 0x1000
#define GIC_VPE_TENABLE_YQ_OFS 0x1004
#define GIC_VPE_TENABLE_INT_31_0_OFS 0x1080
#define GIC_VPE_TENABLE_INT_63_32_OFS 0x1084
/* User Mode Visible Section Register Map */
#define GIC_UMV_SH_COUNTER_31_00_OFS 0x0000
#define GIC_UMV_SH_COUNTER_63_32_OFS 0x0004
/* Masks */
#define GIC_SH_CONFIG_COUNTSTOP_SHF 28
#define GIC_SH_CONFIG_COUNTSTOP_MSK (MSK(1) << GIC_SH_CONFIG_COUNTSTOP_SHF)
#define GIC_SH_CONFIG_COUNTBITS_SHF 24
#define GIC_SH_CONFIG_COUNTBITS_MSK (MSK(4) << GIC_SH_CONFIG_COUNTBITS_SHF)
#define GIC_SH_CONFIG_NUMINTRS_SHF 16
#define GIC_SH_CONFIG_NUMINTRS_MSK (MSK(8) << GIC_SH_CONFIG_NUMINTRS_SHF)
#define GIC_SH_CONFIG_NUMVPES_SHF 0
#define GIC_SH_CONFIG_NUMVPES_MSK (MSK(8) << GIC_SH_CONFIG_NUMVPES_SHF)
#define GIC_SH_WEDGE_SET(intr) (intr | (0x1 << 31))
#define GIC_SH_WEDGE_CLR(intr) (intr & ~(0x1 << 31))
#define GIC_MAP_TO_PIN_SHF 31
#define GIC_MAP_TO_PIN_MSK (MSK(1) << GIC_MAP_TO_PIN_SHF)
#define GIC_MAP_TO_NMI_SHF 30
#define GIC_MAP_TO_NMI_MSK (MSK(1) << GIC_MAP_TO_NMI_SHF)
#define GIC_MAP_TO_YQ_SHF 29
#define GIC_MAP_TO_YQ_MSK (MSK(1) << GIC_MAP_TO_YQ_SHF)
#define GIC_MAP_SHF 0
#define GIC_MAP_MSK (MSK(6) << GIC_MAP_SHF)
/* GIC_VPE_CTL Masks */
#define GIC_VPE_CTL_PERFCNT_RTBL_SHF 2
#define GIC_VPE_CTL_PERFCNT_RTBL_MSK (MSK(1) << GIC_VPE_CTL_PERFCNT_RTBL_SHF)
#define GIC_VPE_CTL_TIMER_RTBL_SHF 1
#define GIC_VPE_CTL_TIMER_RTBL_MSK (MSK(1) << GIC_VPE_CTL_TIMER_RTBL_SHF)
#define GIC_VPE_CTL_EIC_MODE_SHF 0
#define GIC_VPE_CTL_EIC_MODE_MSK (MSK(1) << GIC_VPE_CTL_EIC_MODE_SHF)
/* GIC_VPE_PEND Masks */
#define GIC_VPE_PEND_WD_SHF 0
#define GIC_VPE_PEND_WD_MSK (MSK(1) << GIC_VPE_PEND_WD_SHF)
#define GIC_VPE_PEND_CMP_SHF 1
#define GIC_VPE_PEND_CMP_MSK (MSK(1) << GIC_VPE_PEND_CMP_SHF)
#define GIC_VPE_PEND_TIMER_SHF 2
#define GIC_VPE_PEND_TIMER_MSK (MSK(1) << GIC_VPE_PEND_TIMER_SHF)
#define GIC_VPE_PEND_PERFCOUNT_SHF 3
#define GIC_VPE_PEND_PERFCOUNT_MSK (MSK(1) << GIC_VPE_PEND_PERFCOUNT_SHF)
#define GIC_VPE_PEND_SWINT0_SHF 4
#define GIC_VPE_PEND_SWINT0_MSK (MSK(1) << GIC_VPE_PEND_SWINT0_SHF)
#define GIC_VPE_PEND_SWINT1_SHF 5
#define GIC_VPE_PEND_SWINT1_MSK (MSK(1) << GIC_VPE_PEND_SWINT1_SHF)
/* GIC_VPE_RMASK Masks */
#define GIC_VPE_RMASK_WD_SHF 0
#define GIC_VPE_RMASK_WD_MSK (MSK(1) << GIC_VPE_RMASK_WD_SHF)
#define GIC_VPE_RMASK_CMP_SHF 1
#define GIC_VPE_RMASK_CMP_MSK (MSK(1) << GIC_VPE_RMASK_CMP_SHF)
#define GIC_VPE_RMASK_TIMER_SHF 2
#define GIC_VPE_RMASK_TIMER_MSK (MSK(1) << GIC_VPE_RMASK_TIMER_SHF)
#define GIC_VPE_RMASK_PERFCNT_SHF 3
#define GIC_VPE_RMASK_PERFCNT_MSK (MSK(1) << GIC_VPE_RMASK_PERFCNT_SHF)
#define GIC_VPE_RMASK_SWINT0_SHF 4
#define GIC_VPE_RMASK_SWINT0_MSK (MSK(1) << GIC_VPE_RMASK_SWINT0_SHF)
#define GIC_VPE_RMASK_SWINT1_SHF 5
#define GIC_VPE_RMASK_SWINT1_MSK (MSK(1) << GIC_VPE_RMASK_SWINT1_SHF)
/* GIC_VPE_SMASK Masks */
#define GIC_VPE_SMASK_WD_SHF 0
#define GIC_VPE_SMASK_WD_MSK (MSK(1) << GIC_VPE_SMASK_WD_SHF)
#define GIC_VPE_SMASK_CMP_SHF 1
#define GIC_VPE_SMASK_CMP_MSK (MSK(1) << GIC_VPE_SMASK_CMP_SHF)
#define GIC_VPE_SMASK_TIMER_SHF 2
#define GIC_VPE_SMASK_TIMER_MSK (MSK(1) << GIC_VPE_SMASK_TIMER_SHF)
#define GIC_VPE_SMASK_PERFCNT_SHF 3
#define GIC_VPE_SMASK_PERFCNT_MSK (MSK(1) << GIC_VPE_SMASK_PERFCNT_SHF)
#define GIC_VPE_SMASK_SWINT0_SHF 4
#define GIC_VPE_SMASK_SWINT0_MSK (MSK(1) << GIC_VPE_SMASK_SWINT0_SHF)
#define GIC_VPE_SMASK_SWINT1_SHF 5
#define GIC_VPE_SMASK_SWINT1_MSK (MSK(1) << GIC_VPE_SMASK_SWINT1_SHF)
/*
* Set the Mapping of Interrupt X to a VPE.
*/
#define GIC_SH_MAP_TO_VPE_SMASK(intr, vpe) \
GICWRITE(GIC_REG_ADDR(SHARED, GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe)), \
GIC_SH_MAP_TO_VPE_REG_BIT(vpe))
/*
* Interrupt Meta-data specification. The ipiflag helps
* in building ipi_map.
*/
struct gic_intr_map {
unsigned int cpunum; /* Directed to this CPU */
#define GIC_UNUSED 0xdead /* Dummy data */
unsigned int pin; /* Directed to this Pin */
unsigned int polarity; /* Polarity : +/- */
unsigned int trigtype; /* Trigger : Edge/Levl */
unsigned int flags; /* Misc flags */
#define GIC_FLAG_TRANSPARENT 0x01
};
/*
* This is only used in EIC mode. This helps to figure out which
* shared interrupts we need to process when we get a vector interrupt.
*/
#define GIC_MAX_SHARED_INTR 0x5
struct gic_shared_intr_map {
unsigned int num_shared_intr;
unsigned int intr_list[GIC_MAX_SHARED_INTR];
unsigned int local_intr_mask;
};
/* GIC nomenclature for Core Interrupt Pins. */
#define GIC_CPU_INT0 0 /* Core Interrupt 2 */
#define GIC_CPU_INT1 1 /* . */
#define GIC_CPU_INT2 2 /* . */
#define GIC_CPU_INT3 3 /* . */
#define GIC_CPU_INT4 4 /* . */
#define GIC_CPU_INT5 5 /* Core Interrupt 7 */
/* Local GIC interrupts. */
#define GIC_INT_TMR (GIC_CPU_INT5)
#define GIC_INT_PERFCTR (GIC_CPU_INT5)
/* Add 2 to convert non-EIC hardware interrupt to EIC vector number. */
#define GIC_CPU_TO_VEC_OFFSET (2)
/* Mapped interrupt to pin X, then GIC will generate the vector (X+1). */
#define GIC_PIN_TO_VEC_OFFSET (1)
#include <linux/clocksource.h>
#include <linux/irq.h>
extern unsigned int gic_present;
extern unsigned int gic_frequency;
extern unsigned long _gic_base;
extern unsigned int gic_irq_base;
extern unsigned int gic_irq_flags[];
extern struct gic_shared_intr_map gic_shared_intr_map[];
extern void gic_init(unsigned long gic_base_addr,
unsigned long gic_addrspace_size, struct gic_intr_map *intrmap,
unsigned int intrmap_size, unsigned int irqbase);
extern void gic_clocksource_init(unsigned int);
extern unsigned int gic_compare_int (void);
extern cycle_t gic_read_count(void);
extern cycle_t gic_read_compare(void);
extern void gic_write_compare(cycle_t cnt);
extern void gic_write_cpu_compare(cycle_t cnt, int cpu);
extern void gic_send_ipi(unsigned int intr);
extern unsigned int plat_ipi_call_int_xlate(unsigned int);
extern unsigned int plat_ipi_resched_int_xlate(unsigned int);
extern void gic_bind_eic_interrupt(int irq, int set);
extern unsigned int gic_get_timer_pending(void);
extern void gic_get_int_mask(unsigned long *dst, const unsigned long *src);
extern unsigned int gic_get_int(void);
extern void gic_enable_interrupt(int irq_vec);
extern void gic_disable_interrupt(int irq_vec);
extern void gic_irq_ack(struct irq_data *d);
extern void gic_finish_irq(struct irq_data *d);
extern void gic_platform_init(int irqs, struct irq_chip *irq_controller);
#endif /* _ASM_GICREGS_H */
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