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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef PROGRAM_LOADING_H
#define PROGRAM_LOADING_H
#include <bootmem.h>
#include <commonlib/bsd/cbfs_serialized.h>
#include <commonlib/region.h>
#include <types.h>
enum {
/* Last segment of program. Can be used to take different actions for
* cache maintenance of a program load. */
SEG_FINAL = 1 << 0,
};
enum prog_type {
PROG_UNKNOWN,
PROG_BOOTBLOCK,
PROG_VERSTAGE,
PROG_ROMSTAGE,
PROG_RAMSTAGE,
PROG_REFCODE,
PROG_PAYLOAD,
PROG_BL31,
PROG_BL32,
PROG_POSTCAR,
PROG_OPENSBI,
};
/*
* prog_segment_loaded() is called for each segment of a program loaded. The
* SEG_FINAL flag will be set on the last segment loaded. The following two
* functions, platform_segment_loaded() and arch_segment_loaded(), are called
* in that order within prog_segment_loaded(). In short, rely on
* prog_segment_loaded() to perform the proper dispatch sequence.
*/
void prog_segment_loaded(uintptr_t start, size_t size, int flags);
void platform_segment_loaded(uintptr_t start, size_t size, int flags);
void arch_segment_loaded(uintptr_t start, size_t size, int flags);
/* Representation of a program. */
struct prog {
enum prog_type type;
enum cbfs_type cbfs_type;
const char *name;
void *start; /* Program start in memory. */
size_t size; /* Program size in memory (including BSS). */
void (*entry)(void *); /* Function pointer to entry point. */
void *arg; /* Optional argument (only valid for some archs). */
};
#define PROG_INIT(type_, name_) \
{ \
.type = (type_), \
.name = (name_), \
}
static inline const char *prog_name(const struct prog *prog)
{
return prog->name;
}
static inline enum prog_type prog_type(const struct prog *prog)
{
return prog->type;
}
static inline enum cbfs_type prog_cbfs_type(const struct prog *prog)
{
return prog->cbfs_type;
}
static inline size_t prog_size(const struct prog *prog)
{
return prog->size;
}
static inline void *prog_start(const struct prog *prog)
{
return prog->start;
}
static inline void *prog_entry(const struct prog *prog)
{
return prog->entry;
}
static inline void *prog_entry_arg(const struct prog *prog)
{
return prog->arg;
}
/* Can be used to get an rdev representation of program area in memory. */
static inline void prog_chain_rdev(const struct prog *prog,
struct region_device *rdev_out)
{
rdev_chain_mem(rdev_out, prog->start, prog->size);
}
static inline void prog_set_area(struct prog *prog, void *start, size_t size)
{
prog->start = start;
prog->size = size;
}
static inline void prog_set_entry(struct prog *prog, void *e, void *arg)
{
prog->entry = e;
prog->arg = arg;
}
static inline void prog_set_arg(struct prog *prog, void *arg)
{
prog->arg = arg;
}
/* The prog_locate_hook() is called prior to CBFS traversal. The hook can be
* used to implement policy that allows or prohibits further program loading.
* The type and name field within struct prog are the only valid fields. A 0
* return value allows loading while a non-zero return value prohibits it. */
int prog_locate_hook(struct prog *prog);
/* Run the program described by prog. */
void prog_run(struct prog *prog);
/* Per architecture implementation running a program. */
void arch_prog_run(struct prog *prog);
/* Platform (SoC/chipset) specific overrides for running a program. This is
* called prior to calling the arch_prog_run. Thus, if there is anything
* special that needs to be done by the platform similar to the architecture
* code it needs to that as well. */
void platform_prog_run(struct prog *prog);
/************************
* ROMSTAGE LOADING *
************************/
/* Run romstage from bootblock. */
void run_romstage(void);
/* Runtime selector for CBFS_PREFIX of romstage. */
enum cb_err legacy_romstage_select_and_load(struct prog *romstage);
/************************
* RAMSTAGE LOADING *
************************/
/*
* Asynchronously preloads ramstage.
*
* This should be called early on to allow ramstage to load before
* `run_ramstage` is called.
*/
void preload_ramstage(void);
/* Run ramstage from romstage. */
void __noreturn run_ramstage(void);
/***********************
* PAYLOAD LOADING *
***********************/
int payload_arch_usable_ram_quirk(uint64_t start, uint64_t size);
/*
* Asynchronously preloads the payload.
*
* This should be called early on to allow the payload to load before
* `payload_load` is called.
*/
void payload_preload(void);
/* Load payload into memory in preparation to run. */
void payload_load(void);
/* Run the loaded payload. */
void payload_run(void);
/*
* selfload() and selfload_check() load payloads into memory.
* selfload() does not check the payload to see if it targets memory.
* Call selfload_check() to check that the payload targets usable memory.
* If it does not, the load will fail and this function
* will return false. On successful payload loading these functions return true.
*
* Defined in src/lib/selfboot.c
*/
bool selfload_check(struct prog *payload, enum bootmem_type dest_type);
bool selfload(struct prog *payload);
/* Like selfload_check() but with the payload data already mapped to memory. */
bool selfload_mapped(struct prog *payload, void *mapping,
enum bootmem_type dest_type);
/* Load a FIT payload. The payload data must already be mapped to memory. */
void fit_payload(struct prog *payload, void *data);
#endif /* PROGRAM_LOADING_H */
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