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/*
* This file is part of the coreboot project.
*
* Copyright 2013 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/cache.h>
#include <arch/lib_helpers.h>
#include <arch/stages.h>
#include <arch/transition.h>
#include <arm_tf.h>
#include <cbmem.h>
#include <compiler.h>
#include <console/console.h>
#include <program_loading.h>
#include <rules.h>
#include <string.h>
static void run_payload(struct prog *prog)
{
void (*doit)(void *);
void *arg;
doit = prog_entry(prog);
arg = prog_entry_arg(prog);
u64 payload_spsr = get_eret_el(EL2, SPSR_USE_L);
if (IS_ENABLED(CONFIG_ARM64_USE_ARM_TRUSTED_FIRMWARE))
arm_tf_run_bl31((u64)doit, (u64)arg, payload_spsr);
else {
uint8_t current_el = get_current_el();
printk(BIOS_SPEW, "entry = %p\n", doit);
/* If current EL is not EL3, jump to payload at same EL. */
if (current_el != EL3)
doit(arg);
else {
/* If current EL is EL3, we transition to payload in EL2. */
struct exc_state exc_state;
memset(&exc_state, 0, sizeof(exc_state));
exc_state.elx.spsr = payload_spsr;
transition_with_entry(doit, arg, &exc_state);
}
}
}
void arch_prog_run(struct prog *prog)
{
void (*doit)(void *);
void *arg;
if (ENV_RAMSTAGE && prog_type(prog) == PROG_PAYLOAD) {
run_payload(prog);
return;
}
doit = prog_entry(prog);
arg = prog_entry_arg(prog);
doit(prog_entry_arg(prog));
}
int arch_supports_bounce_buffer(void)
{
return 0;
}
/* Generic stage entry point. Can be overridden by board/SoC if needed. */
__weak void stage_entry(void)
{
main();
}
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