mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-26 17:01:07 +00:00
356526d610
due to THREAD_AREA_SLOT increase by foc/x86: implement vm_session interface Add additional static assertion check to detect misconfiguration earlier.
91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
/*
|
|
* \brief Kernel-specific capability helpers and definitions
|
|
* \author Norman Feske
|
|
* \date 2016-06-01
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2016-2017 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 _INCLUDE__FOC__NATIVE_CAPABILITY_H_
|
|
#define _INCLUDE__FOC__NATIVE_CAPABILITY_H_
|
|
|
|
namespace Fiasco {
|
|
#include <l4/sys/consts.h>
|
|
#include <l4/sys/types.h>
|
|
#include <l4/sys/utcb.h>
|
|
#include <l4/sys/task.h>
|
|
|
|
/*********************************************
|
|
** Capability selectors controlled by core **
|
|
*********************************************/
|
|
|
|
/* use the same task cap selector like L4Re for compatibility in L4Linux */
|
|
static constexpr l4_cap_idx_t TASK_CAP = L4_BASE_TASK_CAP;
|
|
|
|
static constexpr l4_cap_idx_t DEBUG_CAP = L4_BASE_DEBUGGER_CAP;
|
|
|
|
/*
|
|
* To not clash with other L4Re cap selector constants (e.g.: L4Linux)
|
|
* leave the following selectors (2-8) empty
|
|
*/
|
|
|
|
/* cap to parent session */
|
|
static constexpr l4_cap_idx_t PARENT_CAP = 0xbUL << L4_CAP_SHIFT;
|
|
|
|
/*
|
|
* Each thread has a designated slot in the core controlled cap
|
|
* selector area, where its ipc gate capability (for server threads),
|
|
* its irq capability (for locks), and the capability to its pager
|
|
* gate are stored
|
|
*/
|
|
|
|
/* offset to thread area */
|
|
static constexpr l4_cap_idx_t THREAD_AREA_BASE = 0xcUL << L4_CAP_SHIFT;
|
|
|
|
/* size of one thread slot */
|
|
static constexpr l4_cap_idx_t THREAD_AREA_SLOT = 0x5UL << L4_CAP_SHIFT;
|
|
|
|
/* offset to the ipc gate cap selector in the slot */
|
|
static constexpr l4_cap_idx_t THREAD_GATE_CAP = 0;
|
|
|
|
/* offset to the pager cap selector in the slot */
|
|
static constexpr l4_cap_idx_t THREAD_PAGER_CAP = 0x1UL << L4_CAP_SHIFT;
|
|
|
|
/* offset to the irq cap selector in the slot */
|
|
static constexpr l4_cap_idx_t THREAD_IRQ_CAP = 0x2UL << L4_CAP_SHIFT;
|
|
|
|
/* offset to the irq cap selector in the slot */
|
|
static constexpr l4_cap_idx_t TASK_VCPU_CAP = 0x3UL << L4_CAP_SHIFT;
|
|
|
|
/* offset to the irq cap selector in the slot */
|
|
static constexpr l4_cap_idx_t TASK_VCPU_IRQ_CAP = 0x4UL << L4_CAP_SHIFT;
|
|
|
|
/* shortcut to the main thread's gate cap */
|
|
static constexpr l4_cap_idx_t MAIN_THREAD_CAP = THREAD_AREA_BASE
|
|
+ THREAD_GATE_CAP;
|
|
|
|
|
|
/*********************************************************
|
|
** Capability selectors controlled by the task itself **
|
|
*********************************************************/
|
|
|
|
static constexpr unsigned THREAD_MAX = (1 << 7);
|
|
static constexpr l4_cap_idx_t USER_BASE_CAP = 0x300 << L4_CAP_SHIFT;
|
|
|
|
static_assert(USER_BASE_CAP > THREAD_MAX * THREAD_AREA_SLOT,
|
|
"USER_BASE_CAP too small for supported maximal threads");
|
|
|
|
struct Capability
|
|
{
|
|
static bool valid(l4_cap_idx_t idx) {
|
|
return !(idx & L4_INVALID_CAP_BIT) && idx != 0; }
|
|
};
|
|
}
|
|
|
|
#endif /* _INCLUDE__FOC__NATIVE_CAPABILITY_H_ */
|