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/*
* xen/arch/arm/vpci.c
*
* 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/sched.h>
#include <xen/vpci.h>
#include <asm/mmio.h>
static int vpci_mmio_read(struct vcpu *v, mmio_info_t *info,
register_t *r, void *p)
{
pci_sbdf_t sbdf;
/* data is needed to prevent a pointer cast on 32bit */
unsigned long data;
/* We ignore segment part and always handle segment 0 */
sbdf.sbdf = VPCI_ECAM_BDF(info->gpa - GUEST_VPCI_ECAM_BASE);
if ( vpci_ecam_read(sbdf, ECAM_REG_OFFSET(info->gpa),
1U << info->dabt.size, &data) )
{
*r = data;
return 1;
}
*r = ~0ul;
return 0;
}
static int vpci_mmio_write(struct vcpu *v, mmio_info_t *info,
register_t r, void *p)
{
pci_sbdf_t sbdf;
/* We ignore segment part and always handle segment 0 */
sbdf.sbdf = VPCI_ECAM_BDF(info->gpa - GUEST_VPCI_ECAM_BASE);
return vpci_ecam_write(sbdf, ECAM_REG_OFFSET(info->gpa),
1U << info->dabt.size, r);
}
static const struct mmio_handler_ops vpci_mmio_handler = {
.read = vpci_mmio_read,
.write = vpci_mmio_write,
};
int domain_vpci_init(struct domain *d)
{
if ( !has_vpci(d) )
return 0;
register_mmio_handler(d, &vpci_mmio_handler,
GUEST_VPCI_ECAM_BASE, GUEST_VPCI_ECAM_SIZE, NULL);
return 0;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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