0,0 → 1,158 |
/* |
* Copyright (c) 2009 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
/** @addtogroup obio |
* @{ |
*/ |
|
/** |
* @file obio.c |
* @brief OBIO driver. |
* |
* OBIO is a short for on-board I/O. On UltraSPARC IIi and systems with U2P, |
* there is a piece of the root PCI bus controller address space, which |
* contains interrupt mapping and clear registers for all on-board devices. |
* Although UltraSPARC IIi and U2P are different in general, these registers can |
* be found at the same addresses. |
*/ |
|
#include <ipc/ipc.h> |
#include <ipc/services.h> |
#include <ipc/bus.h> |
#include <ipc/ns.h> |
#include <sysinfo.h> |
#include <as.h> |
#include <ddi.h> |
#include <align.h> |
#include <bool.h> |
#include <errno.h> |
#include <async.h> |
#include <align.h> |
#include <async.h> |
#include <stdio.h> |
#include <ipc/devmap.h> |
|
#define NAME "obio" |
|
#define OBIO_SIZE 0x1898 |
|
#define OBIO_IMR_BASE 0x200 |
#define OBIO_IMR(ino) (OBIO_IMR_BASE + ((ino) & INO_MASK)) |
|
#define OBIO_CIR_BASE 0x300 |
#define OBIO_CIR(ino) (OBIO_CIR_BASE + ((ino) & INO_MASK)) |
|
#define INO_MASK 0x1f |
|
static void *base_phys; |
static volatile uint64_t *base_virt; |
|
/** Handle one connection to obio. |
* |
* @param iid Hash of the request that opened the connection. |
* @param icall Call data of the request that opened the connection. |
*/ |
static void obio_connection(ipc_callid_t iid, ipc_call_t *icall) |
{ |
ipc_callid_t callid; |
ipc_call_t call; |
|
/* |
* Answer the first IPC_M_CONNECT_ME_TO call. |
*/ |
ipc_answer_0(iid, EOK); |
|
while (1) { |
int inr; |
|
callid = async_get_call(&call); |
switch (IPC_GET_METHOD(call)) { |
case BUS_CLEAR_INTERRUPT: |
inr = IPC_GET_ARG1(call); |
base_virt[OBIO_CIR(inr) & INO_MASK] = 0; |
ipc_answer_0(callid, EOK); |
break; |
default: |
ipc_answer_0(callid, EINVAL); |
break; |
} |
} |
} |
|
/** Initialize the OBIO driver. |
* |
* So far, the driver heavily depends on information provided by the kernel via |
* sysinfo. In the future, there should be a standalone OBIO driver. |
*/ |
static bool obio_init(void) |
{ |
ipcarg_t phonead; |
|
base_phys = (void *) sysinfo_value("obio.base.physical"); |
|
if (!base_phys) { |
printf(NAME ": no OBIO registers found\n"); |
return false; |
} |
|
base_virt = as_get_mappable_page(OBIO_SIZE); |
|
int flags = AS_AREA_READ | AS_AREA_WRITE; |
int retval = physmem_map(base_phys, (void *) base_virt, |
ALIGN_UP(OBIO_SIZE, PAGE_SIZE) >> PAGE_WIDTH, flags); |
|
if (retval < 0) { |
printf(NAME ": Error mapping OBIO registers\n"); |
return false; |
} |
|
printf(NAME ": OBIO registers with base at %p\n", base_phys); |
|
async_set_client_connection(obio_connection); |
ipc_connect_to_me(PHONE_NS, SERVICE_OBIO, 0, 0, &phonead); |
|
return true; |
} |
|
int main(int argc, char **argv) |
{ |
printf(NAME ": HelenOS OBIO driver\n"); |
|
if (!obio_init()) |
return -1; |
|
printf(NAME ": Accepting connections\n"); |
async_manager(); |
|
/* Never reached */ |
return 0; |
} |
|
/** |
* @} |
*/ |
Property changes: |
Added: svn:mergeinfo |