390 lines
11 KiB
C
390 lines
11 KiB
C
/*
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* Copyright (c) 2003
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* Bill Paul <wpaul@windriver.com>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/errno.h>
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#include <sys/callout.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/sched.h>
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#include <sys/systm.h>
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#include <machine/clock.h>
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#include <machine/bus_memio.h>
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#include <machine/bus_pio.h>
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#include <machine/bus.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <compat/ndis/pe_var.h>
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#include <compat/ndis/hal_var.h>
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#include <compat/ndis/ntoskrnl_var.h>
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#define FUNC void(*)(void)
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__stdcall static void hal_stall_exec_cpu(uint32_t);
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__stdcall static void hal_writeport_buf_ulong(uint32_t *,
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uint32_t *, uint32_t);
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__stdcall static void hal_writeport_buf_ushort(uint16_t *,
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uint16_t *, uint32_t);
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__stdcall static void hal_writeport_buf_uchar(uint8_t *,
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uint8_t *, uint32_t);
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__stdcall static void hal_writeport_ulong(uint32_t *, uint32_t);
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__stdcall static void hal_writeport_ushort(uint16_t *, uint16_t);
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__stdcall static void hal_writeport_uchar(uint8_t *, uint8_t);
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__stdcall static uint32_t hal_readport_ulong(uint32_t *);
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__stdcall static uint16_t hal_readport_ushort(uint16_t *);
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__stdcall static uint8_t hal_readport_uchar(uint8_t *);
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__stdcall static void hal_readport_buf_ulong(uint32_t *,
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uint32_t *, uint32_t);
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__stdcall static void hal_readport_buf_ushort(uint16_t *,
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uint16_t *, uint32_t);
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__stdcall static void hal_readport_buf_uchar(uint8_t *,
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uint8_t *, uint32_t);
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__stdcall static uint64_t hal_perfcount(uint64_t *);
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__stdcall static void dummy (void);
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extern struct mtx_pool *ndis_mtxpool;
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__stdcall static void
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hal_stall_exec_cpu(usecs)
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uint32_t usecs;
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{
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DELAY(usecs);
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return;
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}
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__stdcall static void
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hal_writeport_ulong(port, val)
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uint32_t *port;
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uint32_t val;
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{
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bus_space_write_4(NDIS_BUS_SPACE_IO, 0x0, (bus_size_t)port, val);
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return;
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}
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__stdcall static void
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hal_writeport_ushort(port, val)
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uint16_t *port;
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uint16_t val;
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{
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bus_space_write_2(NDIS_BUS_SPACE_IO, 0x0, (bus_size_t)port, val);
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return;
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}
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__stdcall static void
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hal_writeport_uchar(port, val)
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uint8_t *port;
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uint8_t val;
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{
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bus_space_write_1(NDIS_BUS_SPACE_IO, 0x0, (bus_size_t)port, val);
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return;
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}
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__stdcall static void
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hal_writeport_buf_ulong(port, val, cnt)
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uint32_t *port;
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uint32_t *val;
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uint32_t cnt;
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{
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bus_space_write_multi_4(NDIS_BUS_SPACE_IO, 0x0,
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(bus_size_t)port, val, cnt);
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return;
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}
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__stdcall static void
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hal_writeport_buf_ushort(port, val, cnt)
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uint16_t *port;
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uint16_t *val;
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uint32_t cnt;
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{
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bus_space_write_multi_2(NDIS_BUS_SPACE_IO, 0x0,
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(bus_size_t)port, val, cnt);
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return;
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}
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__stdcall static void
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hal_writeport_buf_uchar(port, val, cnt)
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uint8_t *port;
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uint8_t *val;
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uint32_t cnt;
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{
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bus_space_write_multi_1(NDIS_BUS_SPACE_IO, 0x0,
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(bus_size_t)port, val, cnt);
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return;
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}
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__stdcall static uint16_t
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hal_readport_ushort(port)
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uint16_t *port;
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{
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return(bus_space_read_2(NDIS_BUS_SPACE_IO, 0x0, (bus_size_t)port));
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}
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__stdcall static uint32_t
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hal_readport_ulong(port)
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uint32_t *port;
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{
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return(bus_space_read_4(NDIS_BUS_SPACE_IO, 0x0, (bus_size_t)port));
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}
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__stdcall static uint8_t
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hal_readport_uchar(port)
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uint8_t *port;
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{
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return(bus_space_read_1(NDIS_BUS_SPACE_IO, 0x0, (bus_size_t)port));
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}
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__stdcall static void
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hal_readport_buf_ulong(port, val, cnt)
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uint32_t *port;
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uint32_t *val;
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uint32_t cnt;
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{
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bus_space_read_multi_4(NDIS_BUS_SPACE_IO, 0x0,
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(bus_size_t)port, val, cnt);
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return;
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}
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__stdcall static void
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hal_readport_buf_ushort(port, val, cnt)
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uint16_t *port;
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uint16_t *val;
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uint32_t cnt;
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{
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bus_space_read_multi_2(NDIS_BUS_SPACE_IO, 0x0,
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(bus_size_t)port, val, cnt);
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return;
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}
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__stdcall static void
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hal_readport_buf_uchar(port, val, cnt)
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uint8_t *port;
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uint8_t *val;
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uint32_t cnt;
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{
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bus_space_read_multi_1(NDIS_BUS_SPACE_IO, 0x0,
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(bus_size_t)port, val, cnt);
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return;
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}
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/*
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* The spinlock implementation in Windows differs from that of FreeBSD.
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* The basic operation of spinlocks involves two steps: 1) spin in a
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* tight loop while trying to acquire a lock, 2) after obtaining the
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* lock, disable preemption. (Note that on uniprocessor systems, you're
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* allowed to skip the first step and just lock out pre-emption, since
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* it's not possible for you to be in contention with another running
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* thread.) Later, you release the lock then re-enable preemption.
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* The difference between Windows and FreeBSD lies in how preemption
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* is disabled. In FreeBSD, it's done using critical_enter(), which on
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* the x86 arch translates to a cli instruction. This masks off all
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* interrupts, and effectively stops the scheduler from ever running
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* so _nothing_ can execute except the current thread. In Windows,
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* preemption is disabled by raising the processor IRQL to DISPATCH_LEVEL.
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* This stops other threads from running, but does _not_ block device
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* interrupts. This means ISRs can still run, and they can make other
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* threads runable, but those other threads won't be able to execute
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* until the current thread lowers the IRQL to something less than
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* DISPATCH_LEVEL.
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*
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* In FreeBSD, ISRs run in interrupt threads, so to duplicate the
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* Windows notion of IRQLs, we use the following rules:
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*
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* PASSIVE_LEVEL == normal kernel thread priority
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* DISPATCH_LEVEL == lowest interrupt thread priotity (PI_SOFT)
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* DEVICE_LEVEL == highest interrupt thread priority (PI_REALTIME)
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* HIGH_LEVEL == interrupts disabled (critical_enter())
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*
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* Be aware that, at least on the x86 arch, the Windows spinlock
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* functions are divided up in peculiar ways. The actual spinlock
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* functions are KfAcquireSpinLock() and KfReleaseSpinLock(), and
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* they live in HAL.dll. Meanwhile, KeInitializeSpinLock(),
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* KefAcquireSpinLockAtDpcLevel() and KefReleaseSpinLockFromDpcLevel()
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* live in ntoskrnl.exe. Most Windows source code will call
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* KeAcquireSpinLock() and KeReleaseSpinLock(), but these are just
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* macros that call KfAcquireSpinLock() and KfReleaseSpinLock().
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* KefAcquireSpinLockAtDpcLevel() and KefReleaseSpinLockFromDpcLevel()
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* perform the lock aquisition/release functions without doing the
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* IRQL manipulation, and are used when one is already running at
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* DISPATCH_LEVEL. Make sense? Good.
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*
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* According to the Microsoft documentation, any thread that calls
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* KeAcquireSpinLock() must be running at IRQL <= DISPATCH_LEVEL. If
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* we detect someone trying to acquire a spinlock from DEVICE_LEVEL
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* or HIGH_LEVEL, we panic.
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*/
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__stdcall uint8_t
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hal_lock(/*lock*/void)
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{
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kspin_lock *lock;
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uint8_t oldirql;
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__asm__ __volatile__ ("" : "=c" (lock));
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/* I am so going to hell for this. */
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if (hal_irql() > DISPATCH_LEVEL)
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panic("IRQL_NOT_LESS_THAN_OR_EQUAL");
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oldirql = FASTCALL1(hal_raise_irql, DISPATCH_LEVEL);
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FASTCALL1(ntoskrnl_lock_dpc, lock);
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return(oldirql);
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}
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__stdcall void
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hal_unlock(/*lock, newirql*/void)
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{
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kspin_lock *lock;
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uint8_t newirql;
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__asm__ __volatile__ ("" : "=c" (lock), "=d" (newirql));
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FASTCALL1(ntoskrnl_unlock_dpc, lock);
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FASTCALL1(hal_lower_irql, newirql);
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return;
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}
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__stdcall uint8_t
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hal_irql(void)
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{
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if (AT_DISPATCH_LEVEL(curthread))
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return(DISPATCH_LEVEL);
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return(PASSIVE_LEVEL);
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}
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__stdcall static uint64_t
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hal_perfcount(freq)
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uint64_t *freq;
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{
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if (freq != NULL)
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*freq = hz;
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return((uint64_t)ticks);
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}
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__stdcall uint8_t
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hal_raise_irql(/*irql*/ void)
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{
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uint8_t irql;
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uint8_t oldirql;
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__asm__ __volatile__ ("" : "=c" (irql));
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if (irql < hal_irql())
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panic("IRQL_NOT_LESS_THAN");
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if (hal_irql() == DISPATCH_LEVEL)
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return(DISPATCH_LEVEL);
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mtx_lock_spin(&sched_lock);
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oldirql = curthread->td_base_pri;
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sched_prio(curthread, PI_REALTIME);
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curthread->td_base_pri = PI_REALTIME;
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mtx_unlock_spin(&sched_lock);
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return(oldirql);
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}
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__stdcall void
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hal_lower_irql(/*oldirql*/ void)
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{
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uint8_t oldirql;
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__asm__ __volatile__ ("" : "=c" (oldirql));
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if (oldirql == DISPATCH_LEVEL)
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return;
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if (hal_irql() != DISPATCH_LEVEL)
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panic("IRQL_NOT_GREATER_THAN");
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mtx_lock_spin(&sched_lock);
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curthread->td_base_pri = oldirql;
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sched_prio(curthread, oldirql);
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mtx_unlock_spin(&sched_lock);
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return;
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}
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__stdcall
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static void dummy()
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{
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printf ("hal dummy called...\n");
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return;
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}
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image_patch_table hal_functbl[] = {
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{ "KeStallExecutionProcessor", (FUNC)hal_stall_exec_cpu },
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{ "WRITE_PORT_ULONG", (FUNC)hal_writeport_ulong },
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{ "WRITE_PORT_USHORT", (FUNC)hal_writeport_ushort },
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{ "WRITE_PORT_UCHAR", (FUNC)hal_writeport_uchar },
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{ "WRITE_PORT_BUFFER_ULONG", (FUNC)hal_writeport_buf_ulong },
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{ "WRITE_PORT_BUFFER_USHORT", (FUNC)hal_writeport_buf_ushort },
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{ "WRITE_PORT_BUFFER_UCHAR", (FUNC)hal_writeport_buf_uchar },
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{ "READ_PORT_ULONG", (FUNC)hal_readport_ulong },
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{ "READ_PORT_USHORT", (FUNC)hal_readport_ushort },
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{ "READ_PORT_UCHAR", (FUNC)hal_readport_uchar },
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{ "READ_PORT_BUFFER_ULONG", (FUNC)hal_readport_buf_ulong },
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{ "READ_PORT_BUFFER_USHORT", (FUNC)hal_readport_buf_ushort },
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{ "READ_PORT_BUFFER_UCHAR", (FUNC)hal_readport_buf_uchar },
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{ "KfAcquireSpinLock", (FUNC)hal_lock },
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{ "KfReleaseSpinLock", (FUNC)hal_unlock },
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{ "KeGetCurrentIrql", (FUNC)hal_irql },
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{ "KeQueryPerformanceCounter", (FUNC)hal_perfcount },
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{ "KfLowerIrql", (FUNC)hal_lower_irql },
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{ "KfRaiseIrql", (FUNC)hal_raise_irql },
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/*
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* This last entry is a catch-all for any function we haven't
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* implemented yet. The PE import list patching routine will
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* use it for any function that doesn't have an explicit match
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* in this table.
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*/
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{ NULL, (FUNC)dummy },
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/* End of list. */
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{ NULL, NULL },
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};
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