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/*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 <xen/errno.h>
#include <xen/sched.h>
#include <xen/types.h>
#include <asm/current.h>
#include <asm/gic.h>
#include <asm/psci.h>
int do_psci_cpu_on(uint32_t vcpuid, register_t entry_point)
{
struct vcpu *v;
struct domain *d = current->domain;
struct vcpu_guest_context *ctxt;
int rc;
int is_thumb = entry_point & 1;
if ( (vcpuid < 0) || (vcpuid >= MAX_VIRT_CPUS) )
return PSCI_EINVAL;
if ( vcpuid >= d->max_vcpus || (v = d->vcpu[vcpuid]) == NULL )
return PSCI_EINVAL;
/* THUMB set is not allowed with 64-bit domain */
if ( is_pv64_domain(d) && is_thumb )
return PSCI_EINVAL;
if ( (ctxt = alloc_vcpu_guest_context()) == NULL )
return PSCI_DENIED;
vgic_clear_pending_irqs(v);
memset(ctxt, 0, sizeof(*ctxt));
ctxt->user_regs.pc64 = (u64) entry_point;
ctxt->sctlr = SCTLR_BASE;
ctxt->ttbr0 = 0;
ctxt->ttbr1 = 0;
ctxt->ttbcr = 0; /* Defined Reset Value */
if ( is_pv32_domain(d) )
ctxt->user_regs.cpsr = PSR_GUEST32_INIT;
#ifdef CONFIG_ARM_64
else
ctxt->user_regs.cpsr = PSR_GUEST64_INIT;
#endif
/* Start the VCPU with THUMB set if it's requested by the kernel */
if ( is_thumb )
ctxt->user_regs.cpsr |= PSR_THUMB;
ctxt->flags = VGCF_online;
domain_lock(d);
rc = arch_set_info_guest(v, ctxt);
free_vcpu_guest_context(ctxt);
if ( rc < 0 )
{
domain_unlock(d);
return PSCI_DENIED;
}
domain_unlock(d);
vcpu_wake(v);
return PSCI_SUCCESS;
}
int do_psci_cpu_off(uint32_t power_state)
{
struct vcpu *v = current;
if ( !test_and_set_bit(_VPF_down, &v->pause_flags) )
vcpu_sleep_nosync(v);
return PSCI_SUCCESS;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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