/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_MPIC_H
#define _ASM_POWERPC_MPIC_H
#ifdef __KERNEL__
#include <linux/irq.h>
#include <asm/dcr.h>
#include <asm/msi_bitmap.h>
/*
* Global registers
*/
#define MPIC_GREG_BASE 0x01000
#define MPIC_GREG_FEATURE_0 0x00000
#define MPIC_GREG_FEATURE_LAST_SRC_MASK 0x07ff0000
#define MPIC_GREG_FEATURE_LAST_SRC_SHIFT 16
#define MPIC_GREG_FEATURE_LAST_CPU_MASK 0x00001f00
#define MPIC_GREG_FEATURE_LAST_CPU_SHIFT 8
#define MPIC_GREG_FEATURE_VERSION_MASK 0xff
#define MPIC_GREG_FEATURE_1 0x00010
#define MPIC_GREG_GLOBAL_CONF_0 0x00020
#define MPIC_GREG_GCONF_RESET 0x80000000
/* On the FSL mpic implementations the Mode field is expand to be
* 2 bits wide:
* 0b00 = pass through (interrupts routed to IRQ0)
* 0b01 = Mixed mode
* 0b10 = reserved
* 0b11 = External proxy / coreint
*/
#define MPIC_GREG_GCONF_COREINT 0x60000000
#define MPIC_GREG_GCONF_8259_PTHROU_DIS 0x20000000
#define MPIC_GREG_GCONF_NO_BIAS 0x10000000
#define MPIC_GREG_GCONF_BASE_MASK 0x000fffff
#define MPIC_GREG_GCONF_MCK 0x08000000
#define MPIC_GREG_GLOBAL_CONF_1 0x00030
#define MPIC_GREG_VENDOR_0 0x00040
#define MPIC_GREG_VENDOR_1 0x00050
#define MPIC_GREG_VENDOR_2 0x00060
#define MPIC_GREG_VENDOR_3 0x00070
#define MPIC_GREG_VENDOR_ID 0x00080
#define MPIC_GREG_VENDOR_ID_STEPPING_MASK 0x00ff0000
#define MPIC_GREG_VENDOR_ID_STEPPING_SHIFT 16
#define MPIC_GREG_VENDOR_ID_DEVICE_ID_MASK 0x0000ff00
#define MPIC_GREG_VENDOR_ID_DEVICE_ID_SHIFT 8
#define MPIC_GREG_VENDOR_ID_VENDOR_ID_MASK 0x000000ff
#define MPIC_GREG_PROCESSOR_INIT 0x00090
#define MPIC_GREG_IPI_VECTOR_PRI_0 0x000a0
#define MPIC_GREG_IPI_VECTOR_PRI_1 0x000b0
#define MPIC_GREG_IPI_VECTOR_PRI_2 0x000c0
#define MPIC_GREG_IPI_VECTOR_PRI_3 0x000d0
#define MPIC_GREG_IPI_STRIDE 0x10
#define MPIC_GREG_SPURIOUS 0x000e0
#define MPIC_GREG_TIMER_FREQ 0x000f0
/*
*
* Timer registers
*/
#define MPIC_TIMER_BASE 0x01100
#define MPIC_TIMER_STRIDE 0x40
#define MPIC_TIMER_GROUP_STRIDE 0x1000
#define MPIC_TIMER_CURRENT_CNT 0x00000
#define MPIC_TIMER_BASE_CNT 0x00010
#define MPIC_TIMER_VECTOR_PRI 0x00020
#define MPIC_TIMER_DESTINATION 0x00030
/*
* Per-Processor registers
*/
#define MPIC_CPU_THISBASE 0x00000
#define MPIC_CPU_BASE 0x20000
#define MPIC_CPU_STRIDE 0x01000
#define MPIC_CPU_IPI_DISPATCH_0 0x00040
#define MPIC_CPU_IPI_DISPATCH_1 0x00050
#define MPIC_CPU_IPI_DISPATCH_2 0x00060
#define MPIC_CPU_IPI_DISPATCH_3 0x00070
#define MPIC_CPU_IPI_DISPATCH_STRIDE 0x00010
#define MPIC_CPU_CURRENT_TASK_PRI 0x00080
#define MPIC_CPU_TASKPRI_MASK 0x0000000f
#define MPIC_CPU_WHOAMI 0x00090
#define MPIC_CPU_WHOAMI_MASK 0x0000001f
#define MPIC_CPU_INTACK 0x000a0
#define MPIC_CPU_EOI 0x000b0
#define MPIC_CPU_MCACK 0x000c0
/*
* Per-source registers
*/
#define MPIC_IRQ_BASE 0x10000
#define MPIC_IRQ_STRIDE 0x00020
#define MPIC_IRQ_VECTOR_PRI 0x00000
#define MPIC_VECPRI_MASK 0x80000000
#define MPIC_VECPRI_ACTIVITY 0x40000000 /* Read Only */
#define MPIC_VECPRI_PRIORITY_MASK 0x000f0000
#define MPIC_VECPRI_PRIORITY_SHIFT 16
#define MPIC_VECPRI_VECTOR_MASK 0x000007ff
#define MPIC_VECPRI_POLARITY_POSITIVE 0x00800000
#define MPIC_VECPRI_POLARITY_NEGATIVE 0x00000000
#define MPIC_VECPRI_POLARITY_MASK 0x00800000
#define MPIC_VECPRI_SENSE_LEVEL 0x00400000
#define MPIC_VECPRI_SENSE_EDGE 0x00000000
#define MPIC_VECPRI_SENSE_MASK 0x00400000
#define MPIC_IRQ_DESTINATION 0x00010
#define MPIC_FSL_BRR1 0x00000
#define MPIC_FSL_BRR1_VER 0x0000ffff
#define MPIC_MAX_IRQ_SOURCES 2048
#define MPIC_MAX_CPUS 32
#define MPIC_MAX_ISU 32
#define MPIC_MAX_ERR 32
#define MPIC_FSL_ERR_INT 16
/*
* Tsi108 implementation of MPIC has many differences from the original one
*/
/*
* Global registers
*/
#define TSI108_GREG_BASE 0x00000
#define TSI108_GREG_FEATURE_0 0x00000
#define TSI108_GREG_GLOBAL_CONF_0 0x00004
#define TSI108_GREG_VENDOR_ID 0x0000c
#define TSI108_GREG_IPI_VECTOR_PRI_0 0x00204 /* Doorbell 0 */
#define TSI108_GREG_IPI_STRIDE 0x0c
#define TSI108_GREG_SPURIOUS 0x00010
#define TSI108_GREG_TIMER_FREQ 0x00014
/*
* Timer registers
*/
#define TSI108_TIMER_BASE 0x0030
#define TSI108_TIMER_STRIDE 0x10
#define TSI108_TIMER_CURRENT_CNT 0x00000
#define TSI108_TIMER_BASE_CNT 0x00004
#define TSI108_TIMER_VECTOR_PRI 0x00008
#define TSI108_TIMER_DESTINATION 0x0000c
/*
* Per-Processor registers
*/
#define TSI108_CPU_BASE 0x00300
#define TSI108_CPU_STRIDE 0x00040
#define TSI108_CPU_IPI_DISPATCH_0 0x00200
#define TSI108_CPU_IPI_DISPATCH_STRIDE 0x00000
#define TSI108_CPU_CURRENT_TASK_PRI 0x00000
#define TSI108_CPU_WHOAMI 0xffffffff
#define TSI108_CPU_INTACK 0x00004
#define TSI108_CPU_EOI 0x00008
#define TSI108_CPU_MCACK 0x00004 /* Doesn't really exist here */
/*
* Per-source registers
*/
#define TSI108_IRQ_BASE 0x00100
#define TSI108_IRQ_STRIDE 0x00008
#define TSI108_IRQ_VECTOR_PRI 0x00000
#define TSI108_VECPRI_VECTOR_MASK 0x000000ff
#define TSI108_VECPRI_POLARITY_POSITIVE 0x01000000
#define TSI108_VECPRI_POLARITY_NEGATIVE 0x00000000
#define TSI108_VECPRI_SENSE_LEVEL 0x02000000
#define TSI108_VECPRI_SENSE_EDGE 0x00000000
#define TSI108_VECPRI_POLARITY_MASK 0x01000000
#define TSI108_VECPRI_SENSE_MASK 0x02000000
#define TSI108_IRQ_DESTINATION 0x00004
/* weird mpic register indices and mask bits in the HW info array */
enum {
MPIC_IDX_GREG_BASE = 0,
MPIC_IDX_GREG_FEATURE_0,
MPIC_IDX_GREG_GLOBAL_CONF_0,
MPIC_IDX_GREG_VENDOR_ID,
MPIC_IDX_GREG_IPI_VECTOR_PRI_0,
MPIC_IDX_GREG_IPI_STRIDE,
MPIC_IDX_GREG_SPURIOUS,
MPIC_IDX_GREG_TIMER_FREQ,
MPIC_IDX_TIMER_BASE,
MPIC_IDX_TIMER_STRIDE,
MPIC_IDX_TIMER_CURRENT_CNT,
MPIC_IDX_TIMER_BASE_CNT,
MPIC_IDX_TIMER_VECTOR_PRI,
MPIC_IDX_TIMER_DESTINATION,
MPIC_IDX_CPU_BASE,
MPIC_IDX_CPU_STRIDE,
MPIC_IDX_CPU_IPI_DISPATCH_0,
MPIC_IDX_CPU_IPI_DISPATCH_STRIDE,
MPIC_IDX_CPU_CURRENT_TASK_PRI,
MPIC_IDX_CPU_WHOAMI,
MPIC_IDX_CPU_INTACK,
MPIC_IDX_CPU_EOI,
MPIC_IDX_CPU_MCACK,
MPIC_IDX_IRQ_BASE,
MPIC_IDX_IRQ_STRIDE,
MPIC_IDX_IRQ_VECTOR_PRI,
MPIC_IDX_VECPRI_VECTOR_MASK,
MPIC_IDX_VECPRI_POLARITY_POSITIVE,
MPIC_IDX_VECPRI_POLARITY_NEGATIVE,
MPIC_IDX_VECPRI_SENSE_LEVEL,
MPIC_IDX_VECPRI_SENSE_EDGE,
MPIC_IDX_VECPRI_POLARITY_MASK,
MPIC_IDX_VECPRI_SENSE_MASK,
MPIC_IDX_IRQ_DESTINATION,
MPIC_IDX_END
};
#ifdef CONFIG_MPIC_U3_HT_IRQS
/* Fixup table entry */
struct mpic_irq_fixup
{
u8 __iomem *base;
u8 __iomem *applebase;
u32 data;
unsigned int index;
};
#endif /* CONFIG_MPIC_U3_HT_IRQS */
enum mpic_reg_type {
mpic_access_mmio_le,
mpic_access_mmio_be,
#ifdef CONFIG_PPC_DCR
mpic_access_dcr
#endif
};
struct mpic_reg_bank {
u32 __iomem *base;
#ifdef CONFIG_PPC_DCR
dcr_host_t dhost;
#endif /* CONFIG_PPC_DCR */
};
struct mpic_irq_save {
u32 vecprio,
dest;
#ifdef CONFIG_MPIC_U3_HT_IRQS
u32 fixup_data;
#endif
};
/* The instance data of a given MPIC */
struct mpic
{
/* The OpenFirmware dt node for this MPIC */
struct device_node *node;
/* The remapper for this MPIC */
struct irq_domain *irqhost;
/* The "linux" controller struct */
struct irq_chip hc_irq;
#ifdef CONFIG_MPIC_U3_HT_IRQS
struct irq_chip hc_ht_irq;
#endif
#ifdef CONFIG_SMP
struct irq_chip hc_ipi;
#endif
struct irq_chip hc_tm;
struct irq_chip hc_err;
const char *name;
/* Flags */
unsigned int flags;
/* How many irq sources in a given ISU */
unsigned int isu_size;
unsigned int isu_shift;
unsigned int isu_mask;
/* Number of sources */
unsigned int num_sources;
/* vector numbers used for internal sources (ipi/timers) */
unsigned int ipi_vecs[4];
unsigned int timer_vecs[8];
/* vector numbers used for FSL MPIC error interrupts */
unsigned int err_int_vecs[MPIC_MAX_ERR];
/* Spurious vector to program into unused sources */
unsigned int spurious_vec;
#ifdef CONFIG_MPIC_U3_HT_IRQS
/* The fixup table */
struct mpic_irq_fixup *fixups;
raw_spinlock_t fixup_lock;
#endif
/* Register access method */
enum mpic_reg_type reg_type;
/* The physical base address of the MPIC */
phys_addr_t paddr;
/* The various ioremap'ed bases */
struct mpic_reg_bank thiscpuregs;
struct mpic_reg_bank gregs;
struct mpic_reg_bank tmregs;
struct mpic_reg_bank cpuregs[MPIC_MAX_CPUS];
struct mpic_reg_bank isus[MPIC_MAX_ISU];
/* ioremap'ed base for error interrupt registers */
u32 __iomem *err_regs;
/* Protected sources */
unsigned long *protected;
#ifdef CONFIG_MPIC_WEIRD
/* Pointer to HW info array */
u32 *hw_set;
#endif
#ifdef CONFIG_PCI_MSI
struct msi_bitmap msi_bitmap;
#endif
#ifdef CONFIG_MPIC_BROKEN_REGREAD
u32 isu_reg0_shadow[MPIC_MAX_IRQ_SOURCES];
#endif
/* link */
struct mpic *next;
#ifdef CONFIG_PM
struct mpic_irq_save *save_data;
#endif
};
extern struct bus_type mpic_subsys;
/*
* MPIC flags (passed to mpic_alloc)
*
* The top 4 bits contain an MPIC bhw id that is used to index the
* register offsets and some masks when CONFIG_MPIC_WEIRD is set.
* Note setting any ID (leaving those bits to 0) means standard MPIC
*/
/*
* This is a secondary ("chained") controller; it only uses the CPU0
* registers. Primary controllers have IPIs and affinity control.
*/
#define MPIC_SECONDARY 0x00000001
/* Set this for a big-endian MPIC */
#define MPIC_BIG_ENDIAN 0x00000002
/* Broken U3 MPIC */
#define MPIC_U3_HT_IRQS 0x00000004
/* Broken IPI registers (autodetected) */
#define MPIC_BROKEN_IPI 0x00000008
/* Spurious vector requires EOI */
#define MPIC_SPV_EOI 0x00000020
/* No passthrough disable */
#define MPIC_NO_PTHROU_DIS 0x00000040
/* DCR based MPIC */
#define MPIC_USES_DCR 0x00000080
/* MPIC has 11-bit vector fields (or larger) */
#define MPIC_LARGE_VECTORS 0x00000100
/* Enable delivery of prio 15 interrupts as MCK instead of EE */
#define MPIC_ENABLE_MCK 0x00000200
/* Disable bias among target selection, spread interrupts evenly */
#define MPIC_NO_BIAS 0x00000400
/* Destination only supports a single CPU at a time */
#define MPIC_SINGLE_DEST_CPU 0x00001000
/* Enable CoreInt delivery of interrupts */
#define MPIC_ENABLE_COREINT 0x00002000
/* Do not reset the MPIC during initialization */
#define MPIC_NO_RESET 0x00004000
/* Freescale MPIC (compatible includes "fsl,mpic") */
#define MPIC_FSL 0x00008000
/* Freescale MPIC supports EIMR (error interrupt mask register).
* This flag is set for MPIC version >= 4.1 (version determined
* from the BRR1 register).
*/
#define MPIC_FSL_HAS_EIMR 0x00010000
/* MPIC HW modification ID */
#define MPIC_REGSET_MASK 0xf0000000
#define MPIC_REGSET(val) (((val) & 0xf ) << 28)
#define MPIC_GET_REGSET(flags) (((flags) >> 28) & 0xf)
#define MPIC_REGSET_STANDARD MPIC_REGSET(0) /* Original MPIC */
#define MPIC_REGSET_TSI108 MPIC_REGSET(1) /* Tsi108/109 PIC */
/* Get the version of primary MPIC */
#ifdef CONFIG_MPIC
extern u32 fsl_mpic_primary_get_version(void);
#else
static inline u32 fsl_mpic_primary_get_version(void)
{
return 0;
}
#endif
/* Allocate the controller structure and setup the linux irq descs
* for the range if interrupts passed in. No HW initialization is
* actually performed.
*
* @phys_addr: physial base address of the MPIC
* @flags: flags, see constants above
* @isu_size: number of interrupts in an ISU. Use 0 to use a
* standard ISU-less setup (aka powermac)
* @irq_offset: first irq number to assign to this mpic
* @irq_count: number of irqs to use with this mpic IRQ sources. Pass 0
* to match the number of sources
* @ipi_offset: first irq number to assign to this mpic IPI sources,
* used only on primary mpic
* @senses: array of sense values
* @senses_num: number of entries in the array
*
* Note about the sense array. If none is passed, all interrupts are
* setup to be level negative unless MPIC_U3_HT_IRQS is set in which
* case they are edge positive (and the array is ignored anyway).
* The values in the array start at the first source of the MPIC,
* that is senses[0] correspond to linux irq "irq_offset".
*/
extern struct mpic *mpic_alloc(struct device_node *node,
phys_addr_t phys_addr,
unsigned int flags,
unsigned int isu_size,
unsigned int irq_count,
const char *name);
/* Assign ISUs, to call before mpic_init()
*
* @mpic: controller structure as returned by mpic_alloc()
* @isu_num: ISU number
* @phys_addr: physical address of the ISU
*/
extern void mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,
phys_addr_t phys_addr);
/* Initialize the controller. After this has been called, none of the above
* should be called again for this mpic
*/
extern void mpic_init(struct mpic *mpic);
/*
* All of the following functions must only be used after the
* ISUs have been assigned and the controller fully initialized
* with mpic_init()
*/
/* Change the priority of an interrupt. Default is 8 for irqs and
* 10 for IPIs. You can call this on both IPIs and IRQ numbers, but the
* IPI number is then the offset'ed (linux irq number mapped to the IPI)
*/
extern void mpic_irq_set_priority(unsigned int irq, unsigned int pri);
/* Setup a non-boot CPU */
extern void mpic_setup_this_cpu(void);
/* Clean up for kexec (or cpu offline or ...) */
extern void mpic_teardown_this_cpu(int secondary);
/* Get the current cpu priority for this cpu (0..15) */
extern int mpic_cpu_get_priority(void);
/* Set the current cpu priority for this cpu */
extern void mpic_cpu_set_priority(int prio);
/* Request IPIs on primary mpic */
void __init mpic_request_ipis(void);
/* Send a message (IPI) to a given target (cpu number or MSG_*) */
void smp_mpic_message_pass(int target, int msg);
/* Unmask a specific virq */
extern void mpic_unmask_irq(struct irq_data *d);
/* Mask a specific virq */
extern void mpic_mask_irq(struct irq_data *d);
/* EOI a specific virq */
extern void mpic_end_irq(struct irq_data *d);
/* Fetch interrupt from a given mpic */
extern unsigned int mpic_get_one_irq(struct mpic *mpic);
/* This one gets from the primary mpic */
extern unsigned int mpic_get_irq(void);
/* This one gets from the primary mpic via CoreInt*/
extern unsigned int mpic_get_coreint_irq(void);
/* Fetch Machine Check interrupt from primary mpic */
extern unsigned int mpic_get_mcirq(void);
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_MPIC_H */