Files
foc/l4/pkg/l4sys/include/icu.h
2013-01-11 17:00:47 +01:00

448 lines
12 KiB
C

/**
* \file
* \brief Interrupt controller.
* \ingroup l4_api
*/
/*
* (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
* Alexander Warg <warg@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/kernel_object.h>
#include <l4/sys/ipc.h>
/**
* \defgroup l4_icu_api Interrupt controller
* \ingroup l4_kernel_object_api
*
* \brief The ICU class.
*
* <c>\#include <l4/sys/icu.h></c>
*/
/**
* \brief Flags for IRQ numbers used for the ICU.
* \ingroup l4_icu_api
*/
enum L4_icu_flags
{
/**
* \brief Flag to denote that the IRQ is actually an MSI.
* \hideinitializer
*
* This flag may be used for l4_icu_bind() and l4_icu_unbind() functions to
* denote that the IRQ number is meant to be an MSI.
*/
L4_ICU_FLAG_MSI = 0x80000000,
};
/**
* \brief Interrupt flow types.
* \ingroup l4_irq_api
*/
enum L4_irq_flow_type
{
L4_IRQ_F_NONE = 0, /**< None */
L4_IRQ_F_LEVEL = 0x2, /**< Level triggered */
L4_IRQ_F_EDGE = 0x0, /**< Edge triggered */
L4_IRQ_F_POS = 0x0, /**< Positive trigger */
L4_IRQ_F_NEG = 0x4, /**< Negative trigger */
L4_IRQ_F_BOTH = 0x8, /**< Both edges trigger */
L4_IRQ_F_LEVEL_HIGH = 0x3, /**< Level high trigger */
L4_IRQ_F_LEVEL_LOW = 0x7, /**< Level low trigger */
L4_IRQ_F_POS_EDGE = 0x1, /**< Positive edge trigger */
L4_IRQ_F_NEG_EDGE = 0x5, /**< Negative edge trigger */
L4_IRQ_F_BOTH_EDGE = 0x9, /**< Both edges trigger */
L4_IRQ_F_MASK = 0xf, /**< Mask */
};
/**
* \brief Opcodes to the ICU interface.
* \ingroup l4_api_icu
*/
enum L4_icu_opcode
{
/**
* \brief Bind opcode.
* \hideinitializer
* \see l4_icu_bind()
*/
L4_ICU_OP_BIND = 0,
/**
* \brief Unbind opcode.
* \hideinitializer
* \see l4_icu_unbind()
*/
L4_ICU_OP_UNBIND = 1,
/**
* \brief Info opcode.
* \hideinitializer
* \see l4_icu_info()
*/
L4_ICU_OP_INFO = 2,
/**
* \brief Msi-info opcode.
* \hideinitializer
* \see l4_icu_msi_info()
*/
L4_ICU_OP_MSI_INFO = 3,
/**
* \brief Unmask opcode.
* \hideinitializer
* \see l4_icu_unmask()
*/
L4_ICU_OP_UNMASK = 4,
/**
* \brief Mask opcode.
* \hideinitializer
* \see l4_icu_mask()
*/
L4_ICU_OP_MASK = 5,
/**
* \brief Set-mode opcode.
* \hideinitializer
* \see l4_icu_set_mode()
*/
L4_ICU_OP_SET_MODE = 6,
};
enum L4_icu_ctl_op
{
L4_ICU_CTL_UNMASK = 0,
L4_ICU_CTL_MASK = 1
};
/**
* \brief Info structure for an ICU.
* \ingroup l4_icu_api
*
* This structure contains information about the features of an ICU.
* \see l4_icu_info().
*/
typedef struct l4_icu_info_t
{
/**
* \brief Feature flags.
*
* If #L4_ICU_FLAG_MSI is set the ICU supports MSIs.
*/
unsigned features;
/**
* \brief The number of IRQ lines supported by the ICU,
*/
unsigned nr_irqs;
/**
* \brief The number of MSI vectors supported by the ICU,
*/
unsigned nr_msis;
} l4_icu_info_t;
/**
* \brief Bind an interrupt vector of an interrupt controller to an interrupt object.
* \ingroup l4_icu_api
*
* \param icu ICU to use.
* \param irqnum IRQ vector at the ICU.
* \param irq IRQ capability to bind the IRQ to.
* \return Syscall return tag
*/
L4_INLINE l4_msgtag_t
l4_icu_bind(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq) L4_NOTHROW;
/**
* \internal
*/
L4_INLINE l4_msgtag_t
l4_icu_bind_u(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq,
l4_utcb_t *utcb) L4_NOTHROW;
/**
* \brief Remove binding of an interrupt vector from the interrupt controller object.
* \ingroup l4_icu_api
*
* \param icu ICU to use.
* \param irqnum IRQ vector at the ICU.
* \param irq IRQ object to remove from the ICU.
* \return Syscall return tag
*/
L4_INLINE l4_msgtag_t
l4_icu_unbind(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq) L4_NOTHROW;
/**
* \internal
*/
L4_INLINE l4_msgtag_t
l4_icu_unbind_u(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq,
l4_utcb_t *utcb) L4_NOTHROW;
/**
* \brief Set mode of interrupt.
* \ingroup l4_icu_api
*
* \param icu ICU to use.
* \param irqnum IRQ vector at the ICU.
* \param mode Mode, see L4_irq_flow_type.
* \return Syscall return tag
*
* \ingroup l4_icu_api
*/
L4_INLINE l4_msgtag_t
l4_icu_set_mode(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t mode) L4_NOTHROW;
/**
* \internal
*/
L4_INLINE l4_msgtag_t
l4_icu_set_mode_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t mode,
l4_utcb_t *utcb) L4_NOTHROW;
/**
* \brief Get info about capabilites of ICU.
* \ingroup l4_icu_api
*
* \param icu ICU to use.
* \param info Pointer to an info structure to be filled with information.
* \return Syscall return tag
*/
L4_INLINE l4_msgtag_t
l4_icu_info(l4_cap_idx_t icu, l4_icu_info_t *info) L4_NOTHROW;
/**
* \internal
*/
L4_INLINE l4_msgtag_t
l4_icu_info_u(l4_cap_idx_t icu, l4_icu_info_t *info,
l4_utcb_t *utcb) L4_NOTHROW;
/**
* \brief Get MSI info about IRQ.
* \ingroup l4_icu_api
*
* \param icu ICU to use.
* \param irqnum IRQ vector at the ICU.
* \param msg Pointer to a word to receive the message that must be used
* for the PCI devices MSI message.
* \return Syscall return tag
*/
L4_INLINE l4_msgtag_t
l4_icu_msi_info(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *msg) L4_NOTHROW;
/**
* \internal
*/
L4_INLINE l4_msgtag_t
l4_icu_msi_info_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *msg,
l4_utcb_t *utcb) L4_NOTHROW;
/**
* \brief Unmask an IRQ vector.
* \ingroup l4_icu_api
*
* \param icu ICU to use.
* \param irqnum IRQ vector at the ICU.
* \param label If non-NULL the function also waits for the next message.
* \param to Timeout for message to ICU, if unsure use L4_IPC_NEVER.
* \return Syscall return tag
*/
L4_INLINE l4_msgtag_t
l4_icu_unmask(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
l4_timeout_t to) L4_NOTHROW;
/**
* \internal
*/
L4_INLINE l4_msgtag_t
l4_icu_unmask_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
l4_timeout_t to, l4_utcb_t *utcb) L4_NOTHROW;
/**
* \brief Mask an IRQ vector.
* \ingroup l4_icu_api
*
* \param icu ICU to use.
* \param irqnum IRQ vector at the ICU.
* \param label If non-NULL the function also waits for the next message.
* \param to Timeout for message to ICU, if unsure use L4_IPC_NEVER.
* \return Syscall return tag
*/
L4_INLINE l4_msgtag_t
l4_icu_mask(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
l4_timeout_t to) L4_NOTHROW;
/**
* \internal
*/
L4_INLINE l4_msgtag_t
l4_icu_mask_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
l4_timeout_t to, l4_utcb_t *utcb) L4_NOTHROW;
/**
* \internal
*/
L4_INLINE l4_msgtag_t
l4_icu_control_u(l4_cap_idx_t icu, unsigned irqnum, unsigned op,
l4_umword_t *label,l4_timeout_t to,
l4_utcb_t *utcb) L4_NOTHROW;
/**************************************************************************
* Implementations
*/
L4_INLINE l4_msgtag_t
l4_icu_bind_u(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq,
l4_utcb_t *utcb) L4_NOTHROW
{
l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
m->mr[0] = L4_ICU_OP_BIND;
m->mr[1] = irqnum;
m->mr[2] = l4_map_obj_control(0, 0);
m->mr[3] = l4_obj_fpage(irq, 0, L4_FPAGE_RWX).raw;
return l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 1, 0), L4_IPC_NEVER);
}
L4_INLINE l4_msgtag_t
l4_icu_unbind_u(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq,
l4_utcb_t *utcb) L4_NOTHROW
{
l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
m->mr[0] = L4_ICU_OP_UNBIND;
m->mr[1] = irqnum;
m->mr[2] = l4_map_obj_control(0, 0);
m->mr[3] = l4_obj_fpage(irq, 0, L4_FPAGE_RWX).raw;
return l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 1, 0), L4_IPC_NEVER);
}
L4_INLINE l4_msgtag_t
l4_icu_info_u(l4_cap_idx_t icu, l4_icu_info_t *info,
l4_utcb_t *utcb) L4_NOTHROW
{
l4_msgtag_t res;
l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
m->mr[0] = L4_ICU_OP_INFO;
res = l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 1, 0, 0), L4_IPC_NEVER);
if (!l4_msgtag_has_error(res) && l4_msgtag_label(res) >= 0
&& l4_msgtag_words(res) >= 3)
{
info->features = m->mr[0];
info->nr_irqs = m->mr[1];
info->nr_msis = m->mr[2];
}
return res;
}
L4_INLINE l4_msgtag_t
l4_icu_msi_info_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *msg,
l4_utcb_t *utcb) L4_NOTHROW
{
l4_msgtag_t res;
l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
m->mr[0] = L4_ICU_OP_MSI_INFO;
m->mr[1] = irqnum;
res = l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 0, 0), L4_IPC_NEVER);
if (!l4_msgtag_has_error(res) && l4_msgtag_label(res) >= 0
&& l4_msgtag_words(res) >= 1)
*msg = m->mr[0];
return res;
}
L4_INLINE l4_msgtag_t
l4_icu_set_mode_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t mode,
l4_utcb_t *utcb) L4_NOTHROW
{
l4_msg_regs_t *mr = l4_utcb_mr_u(utcb);
mr->mr[0] = L4_ICU_OP_SET_MODE;
mr->mr[1] = irqnum;
mr->mr[2] = mode;
return l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 3, 0, 0), L4_IPC_NEVER);
}
L4_INLINE l4_msgtag_t
l4_icu_control_u(l4_cap_idx_t icu, unsigned irqnum, unsigned op,
l4_umword_t *label, l4_timeout_t to,
l4_utcb_t *utcb) L4_NOTHROW
{
l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
m->mr[0] = L4_ICU_OP_UNMASK + op;
m->mr[1] = irqnum;
if (label)
return l4_ipc_send_and_wait(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 0, 0),
label, to);
else
return l4_ipc_send(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 0, 0), to);
}
L4_INLINE l4_msgtag_t
l4_icu_mask_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
l4_timeout_t to, l4_utcb_t *utcb) L4_NOTHROW
{ return l4_icu_control_u(icu, irqnum, L4_ICU_CTL_MASK, label, to, utcb); }
L4_INLINE l4_msgtag_t
l4_icu_unmask_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
l4_timeout_t to, l4_utcb_t *utcb) L4_NOTHROW
{ return l4_icu_control_u(icu, irqnum, L4_ICU_CTL_UNMASK, label, to, utcb); }
L4_INLINE l4_msgtag_t
l4_icu_bind(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq) L4_NOTHROW
{ return l4_icu_bind_u(icu, irqnum, irq, l4_utcb()); }
L4_INLINE l4_msgtag_t
l4_icu_unbind(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq) L4_NOTHROW
{ return l4_icu_unbind_u(icu, irqnum, irq, l4_utcb()); }
L4_INLINE l4_msgtag_t
l4_icu_info(l4_cap_idx_t icu, l4_icu_info_t *info) L4_NOTHROW
{ return l4_icu_info_u(icu, info, l4_utcb()); }
L4_INLINE l4_msgtag_t
l4_icu_msi_info(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *msg) L4_NOTHROW
{ return l4_icu_msi_info_u(icu, irqnum, msg, l4_utcb()); }
L4_INLINE l4_msgtag_t
l4_icu_unmask(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
l4_timeout_t to) L4_NOTHROW
{ return l4_icu_control_u(icu, irqnum, L4_ICU_CTL_UNMASK, label, to, l4_utcb()); }
L4_INLINE l4_msgtag_t
l4_icu_mask(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
l4_timeout_t to) L4_NOTHROW
{ return l4_icu_control_u(icu, irqnum, L4_ICU_CTL_MASK, label, to, l4_utcb()); }
L4_INLINE l4_msgtag_t
l4_icu_set_mode(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t mode) L4_NOTHROW
{
return l4_icu_set_mode_u(icu, irqnum, mode, l4_utcb());
}