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/*
* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef __SDEI_PRIVATE_H__
#define __SDEI_PRIVATE_H__
#include <arch_helpers.h>
#include <debug.h>
#include <errno.h>
#include <interrupt_mgmt.h>
#include <platform.h>
#include <sdei.h>
#include <spinlock.h>
#include <stdbool.h>
#include <types.h>
#include <utils_def.h>
#ifdef AARCH32
# error SDEI is implemented only for AArch64 systems
#endif
#ifndef PLAT_SDEI_CRITICAL_PRI
# error Platform must define SDEI critical priority value
#endif
#ifndef PLAT_SDEI_NORMAL_PRI
# error Platform must define SDEI normal priority value
#endif
/* Output SDEI logs as verbose */
#define SDEI_LOG(...) VERBOSE("SDEI: " __VA_ARGS__)
/* SDEI handler unregistered state. This is the default state. */
#define SDEI_STATE_UNREGISTERED 0
/* SDE event status values in bit position */
#define SDEI_STATF_REGISTERED 0
#define SDEI_STATF_ENABLED 1
#define SDEI_STATF_RUNNING 2
/* SDEI SMC error codes */
#define SDEI_EINVAL (-2)
#define SDEI_EDENY (-3)
#define SDEI_EPEND (-5)
#define SDEI_ENOMEM (-10)
/*
* 'info' parameter to SDEI_EVENT_GET_INFO SMC.
*
* Note that the SDEI v1.0 speification mistakenly enumerates the
* SDEI_INFO_EV_SIGNALED as SDEI_INFO_SIGNALED. This will be corrected in a
* future version.
*/
#define SDEI_INFO_EV_TYPE 0
#define SDEI_INFO_EV_NOT_SIGNALED 1
#define SDEI_INFO_EV_PRIORITY 2
#define SDEI_INFO_EV_ROUTING_MODE 3
#define SDEI_INFO_EV_ROUTING_AFF 4
#define SDEI_PRIVATE_MAPPING() (&sdei_global_mappings[_SDEI_MAP_IDX_PRIV])
#define SDEI_SHARED_MAPPING() (&sdei_global_mappings[_SDEI_MAP_IDX_SHRD])
#define for_each_mapping_type(_i, _mapping) \
for (_i = 0, _mapping = &sdei_global_mappings[i]; \
_i < _SDEI_MAP_IDX_MAX; \
_i++, _mapping = &sdei_global_mappings[i])
#define iterate_mapping(_mapping, _i, _map) \
for (_map = (_mapping)->map, _i = 0; \
_i < (_mapping)->num_maps; \
_i++, _map++)
#define for_each_private_map(_i, _map) \
iterate_mapping(SDEI_PRIVATE_MAPPING(), _i, _map)
#define for_each_shared_map(_i, _map) \
iterate_mapping(SDEI_SHARED_MAPPING(), _i, _map)
/* SDEI_FEATURES */
#define SDEI_FEATURE_BIND_SLOTS 0
#define BIND_SLOTS_MASK 0xffff
#define FEATURES_SHARED_SLOTS_SHIFT 16
#define FEATURES_PRIVATE_SLOTS_SHIFT 0
#define FEATURE_BIND_SLOTS(_priv, _shrd) \
((((_priv) & BIND_SLOTS_MASK) << FEATURES_PRIVATE_SLOTS_SHIFT) | \
(((_shrd) & BIND_SLOTS_MASK) << FEATURES_SHARED_SLOTS_SHIFT))
#define GET_EV_STATE(_e, _s) get_ev_state_bit(_e, SDEI_STATF_##_s)
#define SET_EV_STATE(_e, _s) clr_ev_state_bit(_e->state, SDEI_STATF_##_s)
static inline int is_event_private(sdei_ev_map_t *map)
{
return ((map->map_flags & BIT(_SDEI_MAPF_PRIVATE_SHIFT)) != 0);
}
static inline int is_event_shared(sdei_ev_map_t *map)
{
return !is_event_private(map);
}
static inline int is_event_critical(sdei_ev_map_t *map)
{
return ((map->map_flags & BIT(_SDEI_MAPF_CRITICAL_SHIFT)) != 0);
}
static inline int is_event_normal(sdei_ev_map_t *map)
{
return !is_event_critical(map);
}
static inline int is_event_signalable(sdei_ev_map_t *map)
{
return ((map->map_flags & BIT(_SDEI_MAPF_SIGNALABLE_SHIFT)) != 0);
}
static inline int is_map_dynamic(sdei_ev_map_t *map)
{
return ((map->map_flags & BIT(_SDEI_MAPF_DYNAMIC_SHIFT)) != 0);
}
/*
* Checks whether an event is associated with an interrupt. Static events always
* return true, and dynamic events return whether SDEI_INTERRUPT_BIND had been
* called on them. This can be used on both static or dynamic events to check
* for an associated interrupt.
*/
static inline int is_map_bound(sdei_ev_map_t *map)
{
return ((map->map_flags & BIT(_SDEI_MAPF_BOUND_SHIFT)) != 0);
}
static inline void set_map_bound(sdei_ev_map_t *map)
{
map->map_flags |= BIT(_SDEI_MAPF_BOUND_SHIFT);
}
static inline void clr_map_bound(sdei_ev_map_t *map)
{
map->map_flags &= ~(BIT(_SDEI_MAPF_BOUND_SHIFT));
}
static inline int is_secure_sgi(unsigned int intr)
{
return (plat_ic_is_sgi(intr) &&
(plat_ic_get_interrupt_type(intr) == INTR_TYPE_EL3));
}
/*
* Determine EL of the client. If EL2 is implemented (hence the enabled HCE
* bit), deem EL2; otherwise, deem EL1.
*/
static inline unsigned int sdei_client_el(void)
{
return read_scr_el3() & SCR_HCE_BIT ? MODE_EL2 : MODE_EL1;
}
static inline unsigned int sdei_event_priority(sdei_ev_map_t *map)
{
return is_event_critical(map) ? PLAT_SDEI_CRITICAL_PRI :
PLAT_SDEI_NORMAL_PRI;
}
static inline int get_ev_state_bit(sdei_entry_t *se, unsigned int bit_no)
{
return ((se->state & BIT(bit_no)) != 0);
}
static inline void clr_ev_state_bit(sdei_entry_t *se, unsigned int bit_no)
{
se->state &= ~BIT(bit_no);
}
/* SDEI actions for state transition */
typedef enum {
/*
* Actions resulting from client requests. These directly map to SMC
* calls. Note that the state table columns are listed in this order
* too.
*/
DO_REGISTER = 0,
DO_RELEASE = 1,
DO_ENABLE = 2,
DO_DISABLE = 3,
DO_UNREGISTER = 4,
DO_ROUTING = 5,
DO_CONTEXT = 6,
DO_COMPLETE = 7,
DO_COMPLETE_RESUME = 8,
/* Action for event dispatch */
DO_DISPATCH = 9,
DO_MAX,
} sdei_action_t;
typedef enum {
SDEI_NORMAL,
SDEI_CRITICAL
} sdei_class_t;
static inline void sdei_map_lock(sdei_ev_map_t *map)
{
spin_lock(&map->lock);
}
static inline void sdei_map_unlock(sdei_ev_map_t *map)
{
spin_unlock(&map->lock);
}
extern const sdei_mapping_t sdei_global_mappings[];
extern sdei_entry_t sdei_private_event_table[];
extern sdei_entry_t sdei_shared_event_table[];
void init_sdei_state(void);
sdei_ev_map_t *find_event_map_by_intr(int intr_num, int shared);
sdei_ev_map_t *find_event_map(int ev_num);
sdei_entry_t *get_event_entry(sdei_ev_map_t *map);
int sdei_event_context(void *handle, unsigned int param);
int sdei_event_complete(int resume, uint64_t arg);
void sdei_pe_unmask(void);
unsigned int sdei_pe_mask(void);
int sdei_intr_handler(uint32_t intr, uint32_t flags, void *handle,
void *cookie);
bool can_sdei_state_trans(sdei_entry_t *se, sdei_action_t act);
#endif /* __SDEI_PRIVATE_H__ */
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