task.h

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/*
 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
 *               Alexander Warg <warg@os.inf.tu-dresden.de>,
 *               Björn Döbel <doebel@os.inf.tu-dresden.de>,
 *               Torsten Frenzel <frenzel@os.inf.tu-dresden.de>
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU General Public License 2.
 * Please see the COPYING-GPL-2 file for details.
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
 * templates or use macros or inline functions from this file, or you compile
 * this file and link it with other files to produce an executable, this
 * file does not by itself cause the resulting executable to be covered by
 * the GNU General Public License.  This exception does not however
 * invalidate any other reasons why the executable file might be covered by
 * the GNU General Public License.
 */
#pragma once
#include <l4/sys/types.h>
#include <l4/sys/utcb.h>

L4_INLINE l4_msgtag_t
l4_task_map(l4_cap_idx_t dst_task, l4_cap_idx_t src_task,
            l4_fpage_t snd_fpage, l4_umword_t snd_base) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_map_u(l4_cap_idx_t dst_task, l4_cap_idx_t src_task,
              l4_fpage_t snd_fpage, l4_umword_t snd_base, l4_utcb_t *utcb) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_unmap(l4_cap_idx_t task, l4_fpage_t fpage,
              l4_umword_t map_mask) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_unmap_u(l4_cap_idx_t task, l4_fpage_t fpage,
                l4_umword_t map_mask, l4_utcb_t *utcb) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_unmap_batch(l4_cap_idx_t task, l4_fpage_t const *fpages,
                    unsigned num_fpages, l4_umword_t map_mask) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_unmap_batch_u(l4_cap_idx_t task, l4_fpage_t const *fpages,
                      unsigned num_fpages, l4_umword_t map_mask,
                      l4_utcb_t *u) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_delete_obj(l4_cap_idx_t task, l4_cap_idx_t obj) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_delete_obj_u(l4_cap_idx_t task, l4_cap_idx_t obj,
                     l4_utcb_t *u) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_release_cap(l4_cap_idx_t task, l4_cap_idx_t cap) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_release_cap_u(l4_cap_idx_t task, l4_cap_idx_t cap,
                      l4_utcb_t *u) L4_NOTHROW;


L4_INLINE l4_msgtag_t
l4_task_cap_valid(l4_cap_idx_t task, l4_cap_idx_t cap) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_cap_valid_u(l4_cap_idx_t task, l4_cap_idx_t cap, l4_utcb_t *utcb) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_cap_equal(l4_cap_idx_t task, l4_cap_idx_t cap_a,
                  l4_cap_idx_t cap_b) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_add_ku_mem_u(l4_cap_idx_t task, l4_fpage_t ku_mem,
                     l4_utcb_t *u) L4_NOTHROW;

L4_INLINE l4_msgtag_t
l4_task_add_ku_mem(l4_cap_idx_t task, l4_fpage_t ku_mem) L4_NOTHROW;


L4_INLINE l4_msgtag_t
l4_task_cap_equal_u(l4_cap_idx_t task, l4_cap_idx_t cap_a,
                    l4_cap_idx_t cap_b, l4_utcb_t *utcb) L4_NOTHROW;

enum L4_task_ops
{
  L4_TASK_MAP_OP           = 0UL,    
  L4_TASK_UNMAP_OP         = 1UL,    
  L4_TASK_CAP_INFO_OP      = 2UL,    
  L4_TASK_ADD_KU_MEM_OP    = 3UL,    
  L4_TASK_LDT_SET_X86_OP   = 0x11UL, 
  L4_TASK_MAP_VGICC_ARM_OP = 0x12UL, 
};


/* IMPLEMENTATION -----------------------------------------------------------*/

#include <l4/sys/ipc.h>


L4_INLINE l4_msgtag_t
l4_task_map_u(l4_cap_idx_t dst_task, l4_cap_idx_t src_task,
              l4_fpage_t snd_fpage, l4_umword_t snd_base, l4_utcb_t *u) L4_NOTHROW
{
  l4_msg_regs_t *v = l4_utcb_mr_u(u);
  v->mr[0] = L4_TASK_MAP_OP;
  v->mr[3] = l4_map_obj_control(0,0);
  v->mr[4] = l4_obj_fpage(src_task, 0, L4_CAP_FPAGE_RWS).raw;
  v->mr[1] = snd_base;
  v->mr[2] = snd_fpage.raw;
  return l4_ipc_call(dst_task, u, l4_msgtag(L4_PROTO_TASK, 3, 1, 0), L4_IPC_NEVER);
}

L4_INLINE l4_msgtag_t
l4_task_unmap_u(l4_cap_idx_t task, l4_fpage_t fpage,
                l4_umword_t map_mask, l4_utcb_t *u) L4_NOTHROW
{
  l4_msg_regs_t *v = l4_utcb_mr_u(u);
  v->mr[0] = L4_TASK_UNMAP_OP;
  v->mr[1] = map_mask;
  v->mr[2] = fpage.raw;
  return l4_ipc_call(task, u, l4_msgtag(L4_PROTO_TASK, 3, 0, 0), L4_IPC_NEVER);
}

L4_INLINE l4_msgtag_t
l4_task_unmap_batch_u(l4_cap_idx_t task, l4_fpage_t const *fpages,
                      unsigned num_fpages, l4_umword_t map_mask,
                      l4_utcb_t *u) L4_NOTHROW
{
  l4_msg_regs_t *v = l4_utcb_mr_u(u);
  v->mr[0] = L4_TASK_UNMAP_OP;
  v->mr[1] = map_mask;
  __builtin_memcpy(&v->mr[2], fpages, num_fpages * sizeof(l4_fpage_t));
  return l4_ipc_call(task, u, l4_msgtag(L4_PROTO_TASK, 2 + num_fpages, 0, 0), L4_IPC_NEVER);
}

L4_INLINE l4_msgtag_t
l4_task_cap_valid_u(l4_cap_idx_t task, l4_cap_idx_t cap, l4_utcb_t *u) L4_NOTHROW
{
  l4_msg_regs_t *v = l4_utcb_mr_u(u);
  v->mr[0] = L4_TASK_CAP_INFO_OP;
  v->mr[1] = cap & ~1UL;
  return l4_ipc_call(task, u, l4_msgtag(L4_PROTO_TASK, 2, 0, 0), L4_IPC_NEVER);
}

L4_INLINE l4_msgtag_t
l4_task_cap_equal_u(l4_cap_idx_t task, l4_cap_idx_t cap_a,
                    l4_cap_idx_t cap_b, l4_utcb_t *u) L4_NOTHROW
{
  l4_msg_regs_t *v = l4_utcb_mr_u(u);
  v->mr[0] = L4_TASK_CAP_INFO_OP;
  v->mr[1] = cap_a;
  v->mr[2] = cap_b;
  return l4_ipc_call(task, u, l4_msgtag(L4_PROTO_TASK, 3, 0, 0), L4_IPC_NEVER);
}

L4_INLINE l4_msgtag_t
l4_task_add_ku_mem_u(l4_cap_idx_t task, l4_fpage_t ku_mem,
                     l4_utcb_t *u) L4_NOTHROW
{
  l4_msg_regs_t *v = l4_utcb_mr_u(u);
  v->mr[0] = L4_TASK_ADD_KU_MEM_OP;
  v->mr[1] = ku_mem.raw;
  return l4_ipc_call(task, u, l4_msgtag(L4_PROTO_TASK, 2, 0, 0), L4_IPC_NEVER);
}



L4_INLINE l4_msgtag_t
l4_task_map(l4_cap_idx_t dst_task, l4_cap_idx_t src_task,
            l4_fpage_t snd_fpage, l4_umword_t snd_base) L4_NOTHROW
{
  return l4_task_map_u(dst_task, src_task, snd_fpage, snd_base, l4_utcb());
}

L4_INLINE l4_msgtag_t
l4_task_unmap(l4_cap_idx_t task, l4_fpage_t fpage,
              l4_umword_t map_mask) L4_NOTHROW
{
  return l4_task_unmap_u(task, fpage, map_mask, l4_utcb());
}

L4_INLINE l4_msgtag_t
l4_task_unmap_batch(l4_cap_idx_t task, l4_fpage_t const *fpages,
                    unsigned num_fpages, l4_umword_t map_mask) L4_NOTHROW
{
  return l4_task_unmap_batch_u(task, fpages, num_fpages, map_mask,
                               l4_utcb());
}

L4_INLINE l4_msgtag_t
l4_task_delete_obj_u(l4_cap_idx_t task, l4_cap_idx_t obj,
                     l4_utcb_t *u) L4_NOTHROW
{
  return l4_task_unmap_u(task, l4_obj_fpage(obj, 0, L4_CAP_FPAGE_RWSD),
                         L4_FP_DELETE_OBJ, u);
}

L4_INLINE l4_msgtag_t
l4_task_delete_obj(l4_cap_idx_t task, l4_cap_idx_t obj) L4_NOTHROW
{
  return l4_task_delete_obj_u(task, obj, l4_utcb());
}


L4_INLINE l4_msgtag_t
l4_task_release_cap_u(l4_cap_idx_t task, l4_cap_idx_t cap,
                      l4_utcb_t *u) L4_NOTHROW
{
  return l4_task_unmap_u(task, l4_obj_fpage(cap, 0, L4_CAP_FPAGE_RWSD),
                         L4_FP_ALL_SPACES, u);
}

L4_INLINE l4_msgtag_t
l4_task_release_cap(l4_cap_idx_t task, l4_cap_idx_t cap) L4_NOTHROW
{
  return l4_task_release_cap_u(task, cap, l4_utcb());
}

L4_INLINE l4_msgtag_t
l4_task_cap_valid(l4_cap_idx_t task, l4_cap_idx_t cap) L4_NOTHROW
{
  return l4_task_cap_valid_u(task, cap, l4_utcb());
}

L4_INLINE l4_msgtag_t
l4_task_cap_equal(l4_cap_idx_t task, l4_cap_idx_t cap_a,
                  l4_cap_idx_t cap_b) L4_NOTHROW
{
  return l4_task_cap_equal_u(task, cap_a, cap_b, l4_utcb());
}

L4_INLINE l4_msgtag_t
l4_task_add_ku_mem(l4_cap_idx_t task, l4_fpage_t ku_mem) L4_NOTHROW
{
  return l4_task_add_ku_mem_u(task, ku_mem, l4_utcb());
}