genode/repos/base-hw/src/core/spec/arm_v7/cpu_support.h

85 lines
1.8 KiB
C++

/*
* \brief CPU driver for core
* \author Martin stein
* \date 2011-11-03
*/
/*
* Copyright (C) 2011-2017 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
*/
#ifndef _CORE__SPEC__ARM_V7__CPU_SUPPORT_H_
#define _CORE__SPEC__ARM_V7__CPU_SUPPORT_H_
/* core includes */
#include <spec/arm/cpu_support.h>
namespace Genode { struct Arm_v7_cpu; }
struct Genode::Arm_v7_cpu : Arm_cpu
{
/**
* Returns whether this cpu implements the multiprocessor extensions
*/
static bool multi_processor()
{
static bool mp = Mpidr::Me::get(Mpidr::read());
return mp;
}
/**
* Invalidate TLB for given address space id
*/
static void invalidate_tlb(unsigned asid)
{
if (multi_processor()) {
if (asid) Tlbiasidis::write(asid);
else Tlbiallis::write(0);
} else Arm_cpu::invalidate_tlb(asid);
}
static inline void synchronization_barrier()
{
asm volatile("dsb\n"
"isb\n" ::: "memory");
}
static inline size_t data_cache_line_size()
{
struct Ctr : Genode::Register<32> {
struct D_min_line : Bitfield<16,4> {};
};
static size_t data_cache_line_size = 0;
if (!data_cache_line_size) {
data_cache_line_size =
(1 << Ctr::D_min_line::get(Arm_cpu::Ctr::read())) * sizeof(addr_t);
}
return data_cache_line_size;
}
static inline size_t instruction_cache_line_size()
{
struct Ctr : Genode::Register<32> {
struct I_min_line : Bitfield<0,4> {};
};
static size_t instruction_cache_line_size = 0;
if (!instruction_cache_line_size) {
instruction_cache_line_size =
(1 << Ctr::I_min_line::get(Arm_cpu::Ctr::read())) * sizeof(addr_t);
}
return instruction_cache_line_size;
}
};
#endif /* _CORE__SPEC__ARM_V7__CPU_SUPPORT_H_ */