sh/intc/internals.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #include <linux/sh_intc.h>
0003 #include <linux/irq.h>
0004 #include <linux/irqdomain.h>
0005 #include <linux/list.h>
0006 #include <linux/kernel.h>
0007 #include <linux/types.h>
0008 #include <linux/radix-tree.h>
0009 #include <linux/device.h>
0010
0011 #define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
0012     ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
0013      ((addr_e) << 16) | ((addr_d << 24)))
0014
0015 #define _INTC_SHIFT(h)      (h & 0x1f)
0016 #define _INTC_WIDTH(h)      ((h >> 5) & 0xf)
0017 #define _INTC_FN(h)     ((h >> 9) & 0xf)
0018 #define _INTC_MODE(h)       ((h >> 13) & 0x7)
0019 #define _INTC_ADDR_E(h)     ((h >> 16) & 0xff)
0020 #define _INTC_ADDR_D(h)     ((h >> 24) & 0xff)
0021
0022 #ifdef CONFIG_SMP
0023 #define IS_SMP(x)       (x.smp)
0024 #define INTC_REG(d, x, c)   (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
0025 #define SMP_NR(d, x)        ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
0026 #else
0027 #define IS_SMP(x)       0
0028 #define INTC_REG(d, x, c)   (d->reg[(x)])
0029 #define SMP_NR(d, x)        1
0030 #endif
0031
0032 struct intc_handle_int {
0033     unsigned int irq;
0034     unsigned long handle;
0035 };
0036
0037 struct intc_window {
0038     phys_addr_t phys;
0039     void __iomem *virt;
0040     unsigned long size;
0041 };
0042
0043 struct intc_map_entry {
0044     intc_enum enum_id;
0045     struct intc_desc_int *desc;
0046 };
0047
0048 struct intc_subgroup_entry {
0049     unsigned int pirq;
0050     intc_enum enum_id;
0051     unsigned long handle;
0052 };
0053
0054 struct intc_desc_int {
0055     struct list_head list;
0056     struct device dev;
0057     struct radix_tree_root tree;
0058     raw_spinlock_t lock;
0059     unsigned int index;
0060     unsigned long *reg;
0061 #ifdef CONFIG_SMP
0062     unsigned long *smp;
0063 #endif
0064     unsigned int nr_reg;
0065     struct intc_handle_int *prio;
0066     unsigned int nr_prio;
0067     struct intc_handle_int *sense;
0068     unsigned int nr_sense;
0069     struct intc_window *window;
0070     unsigned int nr_windows;
0071     struct irq_domain *domain;
0072     struct irq_chip chip;
0073     bool skip_suspend;
0074 };
0075
0076
0077 enum {
0078     REG_FN_ERR = 0,
0079     REG_FN_TEST_BASE = 1,
0080     REG_FN_WRITE_BASE = 5,
0081     REG_FN_MODIFY_BASE = 9
0082 };
0083
0084 enum {  MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
0085     MODE_MASK_REG,       /* Bit(s) set -> interrupt disabled */
0086     MODE_DUAL_REG,       /* Two registers, set bit to enable / disable */
0087     MODE_PRIO_REG,       /* Priority value written to enable interrupt */
0088     MODE_PCLR_REG,       /* Above plus all bits set to disable interrupt */
0089 };
0090
0091 static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
0092 {
0093     struct irq_chip *chip = irq_get_chip(irq);
0094
0095     return container_of(chip, struct intc_desc_int, chip);
0096 }
0097
0098 /*
0099  * Grumble.
0100  */
0101 static inline void activate_irq(int irq)
0102 {
0103     irq_modify_status(irq, IRQ_NOREQUEST, IRQ_NOPROBE);
0104 }
0105
0106 static inline int intc_handle_int_cmp(const void *a, const void *b)
0107 {
0108     const struct intc_handle_int *_a = a;
0109     const struct intc_handle_int *_b = b;
0110
0111     return _a->irq - _b->irq;
0112 }
0113
0114 /* access.c */
0115 extern unsigned long
0116 (*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
0117
0118 extern unsigned long
0119 (*intc_enable_fns[])(unsigned long addr, unsigned long handle,
0120              unsigned long (*fn)(unsigned long,
0121                 unsigned long, unsigned long),
0122              unsigned int irq);
0123 extern unsigned long
0124 (*intc_disable_fns[])(unsigned long addr, unsigned long handle,
0125               unsigned long (*fn)(unsigned long,
0126                 unsigned long, unsigned long),
0127               unsigned int irq);
0128 extern unsigned long
0129 (*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,
0130                     unsigned long (*fn)(unsigned long,
0131                 unsigned long, unsigned long),
0132                 unsigned int irq);
0133
0134 unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
0135 unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
0136 unsigned int intc_set_field_from_handle(unsigned int value,
0137                 unsigned int field_value,
0138                 unsigned int handle);
0139 unsigned long intc_get_field_from_handle(unsigned int value,
0140                      unsigned int handle);
0141
0142 /* balancing.c */
0143 #ifdef CONFIG_INTC_BALANCING
0144 void intc_balancing_enable(unsigned int irq);
0145 void intc_balancing_disable(unsigned int irq);
0146 void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
0147               struct intc_desc_int *d, intc_enum id);
0148 #else
0149 static inline void intc_balancing_enable(unsigned int irq) { }
0150 static inline void intc_balancing_disable(unsigned int irq) { }
0151 static inline void
0152 intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
0153              struct intc_desc_int *d, intc_enum id) { }
0154 #endif
0155
0156 /* chip.c */
0157 extern struct irq_chip intc_irq_chip;
0158 void _intc_enable(struct irq_data *data, unsigned long handle);
0159
0160 /* core.c */
0161 extern struct list_head intc_list;
0162 extern raw_spinlock_t intc_big_lock;
0163 extern struct bus_type intc_subsys;
0164
0165 unsigned int intc_get_dfl_prio_level(void);
0166 unsigned int intc_get_prio_level(unsigned int irq);
0167 void intc_set_prio_level(unsigned int irq, unsigned int level);
0168
0169 /* handle.c */
0170 unsigned int intc_get_mask_handle(struct intc_desc *desc,
0171                   struct intc_desc_int *d,
0172                   intc_enum enum_id, int do_grps);
0173 unsigned int intc_get_prio_handle(struct intc_desc *desc,
0174                   struct intc_desc_int *d,
0175                   intc_enum enum_id, int do_grps);
0176 unsigned int intc_get_sense_handle(struct intc_desc *desc,
0177                    struct intc_desc_int *d,
0178                    intc_enum enum_id);
0179 void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
0180              struct intc_desc_int *d, intc_enum id);
0181 unsigned long intc_get_ack_handle(unsigned int irq);
0182 void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
0183                   intc_enum enum_id, int enable);
0184
0185 /* irqdomain.c */
0186 void intc_irq_domain_init(struct intc_desc_int *d, struct intc_hw_desc *hw);
0187
0188 /* virq.c */
0189 void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
0190 void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
0191 struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);