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/*
* xen/arch/arm/platform.c
*
* Helpers to execute platform specific code.
*
* Julien Grall <julien.grall@linaro.org>
* Copyright (C) 2013 Linaro Limited.
*
* 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 <asm/platform.h>
#include <xen/device_tree.h>
#include <xen/init.h>
#include <asm/psci.h>
extern const struct platform_desc _splatform[], _eplatform[];
/* Pointer to the current platform description */
static const struct platform_desc *platform;
static bool __init platform_is_compatible(const struct platform_desc *plat)
{
const char *const *compat;
if ( !plat->compatible )
return false;
for ( compat = plat->compatible; *compat; compat++ )
{
if ( dt_machine_is_compatible(*compat) )
return true;
}
return false;
}
void __init platform_init(void)
{
int res = 0;
ASSERT(platform == NULL);
/* Looking for the platform description */
for ( platform = _splatform; platform != _eplatform; platform++ )
{
if ( platform_is_compatible(platform) )
break;
}
/* We don't have specific operations for this platform */
if ( platform == _eplatform )
{
/* TODO: dump DT machine compatible node */
printk(XENLOG_INFO "Platform: Generic System\n");
platform = NULL;
}
else
printk(XENLOG_INFO "Platform: %s\n", platform->name);
if ( platform && platform->init )
res = platform->init();
if ( res )
panic("Unable to initialize the platform\n");
}
int __init platform_init_time(void)
{
int res = 0;
if ( platform && platform->init_time )
res = platform->init_time();
return res;
}
int __init platform_specific_mapping(struct domain *d)
{
int res = 0;
if ( platform && platform->specific_mapping )
res = platform->specific_mapping(d);
return res;
}
#ifdef CONFIG_ARM_32
int platform_cpu_up(int cpu)
{
if ( psci_ver )
return call_psci_cpu_on(cpu);
if ( platform && platform->cpu_up )
return platform->cpu_up(cpu);
return -ENODEV;
}
int __init platform_smp_init(void)
{
if ( platform && platform->smp_init )
return platform->smp_init();
return 0;
}
#endif
void platform_reset(void)
{
if ( platform && platform->reset )
platform->reset();
}
void platform_poweroff(void)
{
if ( platform && platform->poweroff )
platform->poweroff();
}
bool platform_smc(struct cpu_user_regs *regs)
{
if ( likely(platform && platform->smc) )
return platform->smc(regs);
return false;
}
bool platform_has_quirk(uint32_t quirk)
{
uint32_t quirks = 0;
if ( platform && platform->quirks )
quirks = platform->quirks();
return (quirks & quirk);
}
bool platform_device_is_blacklisted(const struct dt_device_node *node)
{
const struct dt_device_match *blacklist = NULL;
if ( platform && platform->blacklist_dev )
blacklist = platform->blacklist_dev;
return (dt_match_node(blacklist, node) != NULL);
}
unsigned int arch_get_dma_bitsize(void)
{
return ( platform && platform->dma_bitsize ) ? platform->dma_bitsize : 32;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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