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https://github.com/ARM-software/arm-trusted-firmware.git
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a758c0b65c
Add support for the PSCI CPU_ON call to allow booting secondary CPU cores. On cold boot they need to be booted with a special register sequence. Also, the "boot remapper" needs to be configured to point to the BL31_BASE, so the CPUs actually start executing BL31 after reset. Change-Id: I406c508070ccb046bfdefd51554f12e1db671fd4 Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
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* Copyright (c) 2021, Stephan Gerhold <stephan@gerhold.net>
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arch.h>
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#include <common/debug.h>
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#include <drivers/arm/gicv2.h>
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#include <drivers/delay_timer.h>
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#include <lib/mmio.h>
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#include <lib/psci/psci.h>
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#include <plat/common/platform.h>
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#include <msm8916_mmap.h>
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#include "msm8916_pm.h"
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static int msm8916_pwr_domain_on(u_register_t mpidr)
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{
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unsigned int core = MPIDR_AFFLVL0_VAL(mpidr);
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VERBOSE("PSCI: Booting CPU %d\n", core);
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msm8916_cpu_boot(core);
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return PSCI_E_SUCCESS;
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}
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static void msm8916_pwr_domain_on_finish(const psci_power_state_t *target_state)
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{
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gicv2_pcpu_distif_init();
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gicv2_cpuif_enable();
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}
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static void __dead2 msm8916_system_reset(void)
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{
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mmio_write_32(MPM_PS_HOLD, 0);
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mdelay(1000);
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ERROR("PSCI: System reset failed\n");
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panic();
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}
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static const plat_psci_ops_t msm8916_psci_ops = {
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.pwr_domain_on = msm8916_pwr_domain_on,
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.pwr_domain_on_finish = msm8916_pwr_domain_on_finish,
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.system_off = msm8916_system_reset,
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.system_reset = msm8916_system_reset,
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};
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/* Defined and used in msm8916_helpers.S */
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extern uintptr_t msm8916_entry_point;
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int plat_setup_psci_ops(uintptr_t sec_entrypoint,
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const plat_psci_ops_t **psci_ops)
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{
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msm8916_entry_point = sec_entrypoint;
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*psci_ops = &msm8916_psci_ops;
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return 0;
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}
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