6472ac3d8a
The SYSCTL_NODE macro defines a list that stores all child-elements of that node. If there's no SYSCTL_DECL macro anywhere else, there's no reason why it shouldn't be static.
854 lines
19 KiB
C
854 lines
19 KiB
C
/*-
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* Copyright (c) 2009 Alex Keda <admin@lissyara.su>
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* Copyright (c) 2009-2010 Jung-uk Kim <jkim@FreeBSD.org>
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* 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 "opt_x86bios.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/sysctl.h>
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#include <contrib/x86emu/x86emu.h>
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#include <contrib/x86emu/x86emu_regs.h>
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#include <compat/x86bios/x86bios.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#ifdef __amd64__
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#define X86BIOS_NATIVE_ARCH
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#endif
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#ifdef __i386__
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#define X86BIOS_NATIVE_VM86
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#endif
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#define X86BIOS_MEM_SIZE 0x00100000 /* 1M */
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#define X86BIOS_TRACE(h, n, r) do { \
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printf(__STRING(h) \
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" (ax=0x%04x bx=0x%04x cx=0x%04x dx=0x%04x es=0x%04x di=0x%04x)\n",\
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(n), (r)->R_AX, (r)->R_BX, (r)->R_CX, (r)->R_DX, \
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(r)->R_ES, (r)->R_DI); \
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} while (0)
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static struct mtx x86bios_lock;
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static SYSCTL_NODE(_debug, OID_AUTO, x86bios, CTLFLAG_RD, NULL,
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"x86bios debugging");
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static int x86bios_trace_call;
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TUNABLE_INT("debug.x86bios.call", &x86bios_trace_call);
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SYSCTL_INT(_debug_x86bios, OID_AUTO, call, CTLFLAG_RW, &x86bios_trace_call, 0,
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"Trace far function calls");
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static int x86bios_trace_int;
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TUNABLE_INT("debug.x86bios.int", &x86bios_trace_int);
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SYSCTL_INT(_debug_x86bios, OID_AUTO, int, CTLFLAG_RW, &x86bios_trace_int, 0,
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"Trace software interrupt handlers");
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#ifdef X86BIOS_NATIVE_VM86
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#include <machine/vm86.h>
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#include <machine/vmparam.h>
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#include <machine/pc/bios.h>
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struct vm86context x86bios_vmc;
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static void
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x86bios_emu2vmf(struct x86emu_regs *regs, struct vm86frame *vmf)
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{
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vmf->vmf_ds = regs->R_DS;
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vmf->vmf_es = regs->R_ES;
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vmf->vmf_ax = regs->R_AX;
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vmf->vmf_bx = regs->R_BX;
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vmf->vmf_cx = regs->R_CX;
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vmf->vmf_dx = regs->R_DX;
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vmf->vmf_bp = regs->R_BP;
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vmf->vmf_si = regs->R_SI;
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vmf->vmf_di = regs->R_DI;
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}
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static void
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x86bios_vmf2emu(struct vm86frame *vmf, struct x86emu_regs *regs)
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{
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regs->R_DS = vmf->vmf_ds;
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regs->R_ES = vmf->vmf_es;
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regs->R_FLG = vmf->vmf_flags;
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regs->R_AX = vmf->vmf_ax;
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regs->R_BX = vmf->vmf_bx;
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regs->R_CX = vmf->vmf_cx;
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regs->R_DX = vmf->vmf_dx;
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regs->R_BP = vmf->vmf_bp;
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regs->R_SI = vmf->vmf_si;
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regs->R_DI = vmf->vmf_di;
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}
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void *
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x86bios_alloc(uint32_t *offset, size_t size, int flags)
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{
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void *vaddr;
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int i;
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if (offset == NULL || size == 0)
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return (NULL);
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vaddr = contigmalloc(size, M_DEVBUF, flags, 0, X86BIOS_MEM_SIZE,
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PAGE_SIZE, 0);
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if (vaddr != NULL) {
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*offset = vtophys(vaddr);
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mtx_lock(&x86bios_lock);
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for (i = 0; i < atop(round_page(size)); i++)
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vm86_addpage(&x86bios_vmc, atop(*offset) + i,
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(vm_offset_t)vaddr + ptoa(i));
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mtx_unlock(&x86bios_lock);
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}
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return (vaddr);
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}
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void
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x86bios_free(void *addr, size_t size)
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{
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vm_paddr_t paddr;
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int i, nfree;
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if (addr == NULL || size == 0)
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return;
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paddr = vtophys(addr);
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if (paddr >= X86BIOS_MEM_SIZE || (paddr & PAGE_MASK) != 0)
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return;
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mtx_lock(&x86bios_lock);
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for (i = 0; i < x86bios_vmc.npages; i++)
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if (x86bios_vmc.pmap[i].kva == (vm_offset_t)addr)
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break;
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if (i >= x86bios_vmc.npages) {
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mtx_unlock(&x86bios_lock);
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return;
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}
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nfree = atop(round_page(size));
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bzero(x86bios_vmc.pmap + i, sizeof(*x86bios_vmc.pmap) * nfree);
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if (i + nfree == x86bios_vmc.npages) {
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x86bios_vmc.npages -= nfree;
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while (--i >= 0 && x86bios_vmc.pmap[i].kva == 0)
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x86bios_vmc.npages--;
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}
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mtx_unlock(&x86bios_lock);
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contigfree(addr, size, M_DEVBUF);
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}
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void
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x86bios_init_regs(struct x86regs *regs)
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{
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bzero(regs, sizeof(*regs));
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}
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void
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x86bios_call(struct x86regs *regs, uint16_t seg, uint16_t off)
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{
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struct vm86frame vmf;
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if (x86bios_trace_call)
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X86BIOS_TRACE(Calling 0x%06x, (seg << 4) + off, regs);
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bzero(&vmf, sizeof(vmf));
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x86bios_emu2vmf((struct x86emu_regs *)regs, &vmf);
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vmf.vmf_cs = seg;
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vmf.vmf_ip = off;
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mtx_lock(&x86bios_lock);
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vm86_datacall(-1, &vmf, &x86bios_vmc);
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mtx_unlock(&x86bios_lock);
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x86bios_vmf2emu(&vmf, (struct x86emu_regs *)regs);
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if (x86bios_trace_call)
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X86BIOS_TRACE(Exiting 0x%06x, (seg << 4) + off, regs);
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}
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uint32_t
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x86bios_get_intr(int intno)
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{
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return (readl(BIOS_PADDRTOVADDR(intno * 4)));
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}
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void
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x86bios_set_intr(int intno, uint32_t saddr)
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{
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writel(BIOS_PADDRTOVADDR(intno * 4), saddr);
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}
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void
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x86bios_intr(struct x86regs *regs, int intno)
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{
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struct vm86frame vmf;
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if (x86bios_trace_int)
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X86BIOS_TRACE(Calling INT 0x%02x, intno, regs);
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bzero(&vmf, sizeof(vmf));
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x86bios_emu2vmf((struct x86emu_regs *)regs, &vmf);
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mtx_lock(&x86bios_lock);
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vm86_datacall(intno, &vmf, &x86bios_vmc);
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mtx_unlock(&x86bios_lock);
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x86bios_vmf2emu(&vmf, (struct x86emu_regs *)regs);
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if (x86bios_trace_int)
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X86BIOS_TRACE(Exiting INT 0x%02x, intno, regs);
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}
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void *
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x86bios_offset(uint32_t offset)
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{
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vm_offset_t addr;
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addr = vm86_getaddr(&x86bios_vmc, X86BIOS_PHYSTOSEG(offset),
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X86BIOS_PHYSTOOFF(offset));
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if (addr == 0)
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addr = BIOS_PADDRTOVADDR(offset);
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return ((void *)addr);
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}
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static int
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x86bios_init(void)
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{
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mtx_init(&x86bios_lock, "x86bios lock", NULL, MTX_DEF);
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bzero(&x86bios_vmc, sizeof(x86bios_vmc));
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return (0);
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}
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static int
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x86bios_uninit(void)
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{
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mtx_destroy(&x86bios_lock);
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return (0);
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}
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#else
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#include <machine/iodev.h>
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#define X86BIOS_PAGE_SIZE 0x00001000 /* 4K */
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#define X86BIOS_IVT_SIZE 0x00000500 /* 1K + 256 (BDA) */
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#define X86BIOS_IVT_BASE 0x00000000
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#define X86BIOS_RAM_BASE 0x00001000
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#define X86BIOS_ROM_BASE 0x000a0000
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#define X86BIOS_ROM_SIZE (X86BIOS_MEM_SIZE - x86bios_rom_phys)
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#define X86BIOS_SEG_SIZE X86BIOS_PAGE_SIZE
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#define X86BIOS_PAGES (X86BIOS_MEM_SIZE / X86BIOS_PAGE_SIZE)
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#define X86BIOS_R_SS _pad2
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#define X86BIOS_R_SP _pad3.I16_reg.x_reg
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static struct x86emu x86bios_emu;
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static void *x86bios_ivt;
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static void *x86bios_rom;
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static void *x86bios_seg;
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static vm_offset_t *x86bios_map;
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static vm_paddr_t x86bios_rom_phys;
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static vm_paddr_t x86bios_seg_phys;
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static int x86bios_fault;
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static uint32_t x86bios_fault_addr;
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static uint16_t x86bios_fault_cs;
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static uint16_t x86bios_fault_ip;
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static void
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x86bios_set_fault(struct x86emu *emu, uint32_t addr)
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{
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x86bios_fault = 1;
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x86bios_fault_addr = addr;
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x86bios_fault_cs = emu->x86.R_CS;
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x86bios_fault_ip = emu->x86.R_IP;
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x86emu_halt_sys(emu);
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}
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static void *
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x86bios_get_pages(uint32_t offset, size_t size)
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{
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vm_offset_t addr;
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if (offset + size > X86BIOS_MEM_SIZE + X86BIOS_IVT_SIZE)
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return (NULL);
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if (offset >= X86BIOS_MEM_SIZE)
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offset -= X86BIOS_MEM_SIZE;
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addr = x86bios_map[offset / X86BIOS_PAGE_SIZE];
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if (addr != 0)
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addr += offset % X86BIOS_PAGE_SIZE;
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return ((void *)addr);
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}
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static void
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x86bios_set_pages(vm_offset_t va, vm_paddr_t pa, size_t size)
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{
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int i, j;
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for (i = pa / X86BIOS_PAGE_SIZE, j = 0;
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j < howmany(size, X86BIOS_PAGE_SIZE); i++, j++)
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x86bios_map[i] = va + j * X86BIOS_PAGE_SIZE;
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}
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static uint8_t
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x86bios_emu_rdb(struct x86emu *emu, uint32_t addr)
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{
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uint8_t *va;
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va = x86bios_get_pages(addr, sizeof(*va));
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if (va == NULL)
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x86bios_set_fault(emu, addr);
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return (*va);
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}
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static uint16_t
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x86bios_emu_rdw(struct x86emu *emu, uint32_t addr)
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{
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uint16_t *va;
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va = x86bios_get_pages(addr, sizeof(*va));
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if (va == NULL)
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x86bios_set_fault(emu, addr);
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#ifndef __NO_STRICT_ALIGNMENT
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if ((addr & 1) != 0)
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return (le16dec(va));
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else
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#endif
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return (le16toh(*va));
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}
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static uint32_t
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x86bios_emu_rdl(struct x86emu *emu, uint32_t addr)
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{
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uint32_t *va;
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va = x86bios_get_pages(addr, sizeof(*va));
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if (va == NULL)
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x86bios_set_fault(emu, addr);
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#ifndef __NO_STRICT_ALIGNMENT
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if ((addr & 3) != 0)
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return (le32dec(va));
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else
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#endif
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return (le32toh(*va));
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}
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static void
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x86bios_emu_wrb(struct x86emu *emu, uint32_t addr, uint8_t val)
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{
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uint8_t *va;
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va = x86bios_get_pages(addr, sizeof(*va));
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if (va == NULL)
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x86bios_set_fault(emu, addr);
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*va = val;
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}
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static void
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x86bios_emu_wrw(struct x86emu *emu, uint32_t addr, uint16_t val)
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{
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uint16_t *va;
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va = x86bios_get_pages(addr, sizeof(*va));
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if (va == NULL)
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x86bios_set_fault(emu, addr);
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#ifndef __NO_STRICT_ALIGNMENT
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if ((addr & 1) != 0)
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le16enc(va, val);
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else
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#endif
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*va = htole16(val);
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}
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static void
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x86bios_emu_wrl(struct x86emu *emu, uint32_t addr, uint32_t val)
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{
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uint32_t *va;
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va = x86bios_get_pages(addr, sizeof(*va));
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if (va == NULL)
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x86bios_set_fault(emu, addr);
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#ifndef __NO_STRICT_ALIGNMENT
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if ((addr & 3) != 0)
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le32enc(va, val);
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else
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#endif
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*va = htole32(val);
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}
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static uint8_t
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x86bios_emu_inb(struct x86emu *emu, uint16_t port)
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{
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#ifndef X86BIOS_NATIVE_ARCH
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if (port == 0xb2) /* APM scratch register */
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return (0);
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if (port >= 0x80 && port < 0x88) /* POST status register */
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return (0);
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#endif
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return (iodev_read_1(port));
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}
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static uint16_t
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x86bios_emu_inw(struct x86emu *emu, uint16_t port)
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{
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uint16_t val;
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#ifndef X86BIOS_NATIVE_ARCH
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if (port >= 0x80 && port < 0x88) /* POST status register */
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return (0);
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if ((port & 1) != 0) {
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val = iodev_read_1(port);
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val |= iodev_read_1(port + 1) << 8;
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} else
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#endif
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val = iodev_read_2(port);
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return (val);
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}
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static uint32_t
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x86bios_emu_inl(struct x86emu *emu, uint16_t port)
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{
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uint32_t val;
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#ifndef X86BIOS_NATIVE_ARCH
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if (port >= 0x80 && port < 0x88) /* POST status register */
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return (0);
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if ((port & 1) != 0) {
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val = iodev_read_1(port);
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val |= iodev_read_2(port + 1) << 8;
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val |= iodev_read_1(port + 3) << 24;
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} else if ((port & 2) != 0) {
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val = iodev_read_2(port);
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val |= iodev_read_2(port + 2) << 16;
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} else
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#endif
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val = iodev_read_4(port);
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return (val);
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}
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static void
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x86bios_emu_outb(struct x86emu *emu, uint16_t port, uint8_t val)
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{
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#ifndef X86BIOS_NATIVE_ARCH
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if (port == 0xb2) /* APM scratch register */
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return;
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if (port >= 0x80 && port < 0x88) /* POST status register */
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return;
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#endif
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iodev_write_1(port, val);
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}
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static void
|
|
x86bios_emu_outw(struct x86emu *emu, uint16_t port, uint16_t val)
|
|
{
|
|
|
|
#ifndef X86BIOS_NATIVE_ARCH
|
|
if (port >= 0x80 && port < 0x88) /* POST status register */
|
|
return;
|
|
|
|
if ((port & 1) != 0) {
|
|
iodev_write_1(port, val);
|
|
iodev_write_1(port + 1, val >> 8);
|
|
} else
|
|
#endif
|
|
iodev_write_2(port, val);
|
|
}
|
|
|
|
static void
|
|
x86bios_emu_outl(struct x86emu *emu, uint16_t port, uint32_t val)
|
|
{
|
|
|
|
#ifndef X86BIOS_NATIVE_ARCH
|
|
if (port >= 0x80 && port < 0x88) /* POST status register */
|
|
return;
|
|
|
|
if ((port & 1) != 0) {
|
|
iodev_write_1(port, val);
|
|
iodev_write_2(port + 1, val >> 8);
|
|
iodev_write_1(port + 3, val >> 24);
|
|
} else if ((port & 2) != 0) {
|
|
iodev_write_2(port, val);
|
|
iodev_write_2(port + 2, val >> 16);
|
|
} else
|
|
#endif
|
|
iodev_write_4(port, val);
|
|
}
|
|
|
|
void *
|
|
x86bios_alloc(uint32_t *offset, size_t size, int flags)
|
|
{
|
|
void *vaddr;
|
|
|
|
if (offset == NULL || size == 0)
|
|
return (NULL);
|
|
vaddr = contigmalloc(size, M_DEVBUF, flags, X86BIOS_RAM_BASE,
|
|
x86bios_rom_phys, X86BIOS_PAGE_SIZE, 0);
|
|
if (vaddr != NULL) {
|
|
*offset = vtophys(vaddr);
|
|
mtx_lock(&x86bios_lock);
|
|
x86bios_set_pages((vm_offset_t)vaddr, *offset, size);
|
|
mtx_unlock(&x86bios_lock);
|
|
}
|
|
|
|
return (vaddr);
|
|
}
|
|
|
|
void
|
|
x86bios_free(void *addr, size_t size)
|
|
{
|
|
vm_paddr_t paddr;
|
|
|
|
if (addr == NULL || size == 0)
|
|
return;
|
|
paddr = vtophys(addr);
|
|
if (paddr < X86BIOS_RAM_BASE || paddr >= x86bios_rom_phys ||
|
|
paddr % X86BIOS_PAGE_SIZE != 0)
|
|
return;
|
|
mtx_lock(&x86bios_lock);
|
|
bzero(x86bios_map + paddr / X86BIOS_PAGE_SIZE,
|
|
sizeof(*x86bios_map) * howmany(size, X86BIOS_PAGE_SIZE));
|
|
mtx_unlock(&x86bios_lock);
|
|
contigfree(addr, size, M_DEVBUF);
|
|
}
|
|
|
|
void
|
|
x86bios_init_regs(struct x86regs *regs)
|
|
{
|
|
|
|
bzero(regs, sizeof(*regs));
|
|
regs->X86BIOS_R_SS = X86BIOS_PHYSTOSEG(x86bios_seg_phys);
|
|
regs->X86BIOS_R_SP = X86BIOS_PAGE_SIZE - 2;
|
|
}
|
|
|
|
void
|
|
x86bios_call(struct x86regs *regs, uint16_t seg, uint16_t off)
|
|
{
|
|
|
|
if (x86bios_trace_call)
|
|
X86BIOS_TRACE(Calling 0x%06x, (seg << 4) + off, regs);
|
|
|
|
mtx_lock(&x86bios_lock);
|
|
memcpy(&x86bios_emu.x86, regs, sizeof(*regs));
|
|
x86bios_fault = 0;
|
|
spinlock_enter();
|
|
x86emu_exec_call(&x86bios_emu, seg, off);
|
|
spinlock_exit();
|
|
memcpy(regs, &x86bios_emu.x86, sizeof(*regs));
|
|
mtx_unlock(&x86bios_lock);
|
|
|
|
if (x86bios_trace_call) {
|
|
X86BIOS_TRACE(Exiting 0x%06x, (seg << 4) + off, regs);
|
|
if (x86bios_fault)
|
|
printf("Page fault at 0x%06x from 0x%04x:0x%04x.\n",
|
|
x86bios_fault_addr, x86bios_fault_cs,
|
|
x86bios_fault_ip);
|
|
}
|
|
}
|
|
|
|
uint32_t
|
|
x86bios_get_intr(int intno)
|
|
{
|
|
|
|
return (le32toh(*((uint32_t *)x86bios_ivt + intno)));
|
|
}
|
|
|
|
void
|
|
x86bios_set_intr(int intno, uint32_t saddr)
|
|
{
|
|
|
|
*((uint32_t *)x86bios_ivt + intno) = htole32(saddr);
|
|
}
|
|
|
|
void
|
|
x86bios_intr(struct x86regs *regs, int intno)
|
|
{
|
|
|
|
if (intno < 0 || intno > 255)
|
|
return;
|
|
|
|
if (x86bios_trace_int)
|
|
X86BIOS_TRACE(Calling INT 0x%02x, intno, regs);
|
|
|
|
mtx_lock(&x86bios_lock);
|
|
memcpy(&x86bios_emu.x86, regs, sizeof(*regs));
|
|
x86bios_fault = 0;
|
|
spinlock_enter();
|
|
x86emu_exec_intr(&x86bios_emu, intno);
|
|
spinlock_exit();
|
|
memcpy(regs, &x86bios_emu.x86, sizeof(*regs));
|
|
mtx_unlock(&x86bios_lock);
|
|
|
|
if (x86bios_trace_int) {
|
|
X86BIOS_TRACE(Exiting INT 0x%02x, intno, regs);
|
|
if (x86bios_fault)
|
|
printf("Page fault at 0x%06x from 0x%04x:0x%04x.\n",
|
|
x86bios_fault_addr, x86bios_fault_cs,
|
|
x86bios_fault_ip);
|
|
}
|
|
}
|
|
|
|
void *
|
|
x86bios_offset(uint32_t offset)
|
|
{
|
|
|
|
return (x86bios_get_pages(offset, 1));
|
|
}
|
|
|
|
static __inline void
|
|
x86bios_unmap_mem(void)
|
|
{
|
|
|
|
free(x86bios_map, M_DEVBUF);
|
|
if (x86bios_ivt != NULL)
|
|
#ifdef X86BIOS_NATIVE_ARCH
|
|
pmap_unmapbios((vm_offset_t)x86bios_ivt, X86BIOS_IVT_SIZE);
|
|
#else
|
|
free(x86bios_ivt, M_DEVBUF);
|
|
#endif
|
|
if (x86bios_rom != NULL)
|
|
pmap_unmapdev((vm_offset_t)x86bios_rom, X86BIOS_ROM_SIZE);
|
|
if (x86bios_seg != NULL)
|
|
contigfree(x86bios_seg, X86BIOS_SEG_SIZE, M_DEVBUF);
|
|
}
|
|
|
|
static __inline int
|
|
x86bios_map_mem(void)
|
|
{
|
|
|
|
x86bios_map = malloc(sizeof(*x86bios_map) * X86BIOS_PAGES, M_DEVBUF,
|
|
M_WAITOK | M_ZERO);
|
|
|
|
#ifdef X86BIOS_NATIVE_ARCH
|
|
x86bios_ivt = pmap_mapbios(X86BIOS_IVT_BASE, X86BIOS_IVT_SIZE);
|
|
|
|
/* Probe EBDA via BDA. */
|
|
x86bios_rom_phys = *(uint16_t *)((caddr_t)x86bios_ivt + 0x40e);
|
|
x86bios_rom_phys = x86bios_rom_phys << 4;
|
|
if (x86bios_rom_phys != 0 && x86bios_rom_phys < X86BIOS_ROM_BASE &&
|
|
X86BIOS_ROM_BASE - x86bios_rom_phys <= 128 * 1024)
|
|
x86bios_rom_phys =
|
|
rounddown(x86bios_rom_phys, X86BIOS_PAGE_SIZE);
|
|
else
|
|
#else
|
|
x86bios_ivt = malloc(X86BIOS_IVT_SIZE, M_DEVBUF, M_ZERO | M_WAITOK);
|
|
#endif
|
|
|
|
x86bios_rom_phys = X86BIOS_ROM_BASE;
|
|
x86bios_rom = pmap_mapdev(x86bios_rom_phys, X86BIOS_ROM_SIZE);
|
|
if (x86bios_rom == NULL)
|
|
goto fail;
|
|
#ifdef X86BIOS_NATIVE_ARCH
|
|
/* Change attribute for EBDA. */
|
|
if (x86bios_rom_phys < X86BIOS_ROM_BASE &&
|
|
pmap_change_attr((vm_offset_t)x86bios_rom,
|
|
X86BIOS_ROM_BASE - x86bios_rom_phys, PAT_WRITE_BACK) != 0)
|
|
goto fail;
|
|
#endif
|
|
|
|
x86bios_seg = contigmalloc(X86BIOS_SEG_SIZE, M_DEVBUF, M_WAITOK,
|
|
X86BIOS_RAM_BASE, x86bios_rom_phys, X86BIOS_PAGE_SIZE, 0);
|
|
x86bios_seg_phys = vtophys(x86bios_seg);
|
|
|
|
x86bios_set_pages((vm_offset_t)x86bios_ivt, X86BIOS_IVT_BASE,
|
|
X86BIOS_IVT_SIZE);
|
|
x86bios_set_pages((vm_offset_t)x86bios_rom, x86bios_rom_phys,
|
|
X86BIOS_ROM_SIZE);
|
|
x86bios_set_pages((vm_offset_t)x86bios_seg, x86bios_seg_phys,
|
|
X86BIOS_SEG_SIZE);
|
|
|
|
if (bootverbose) {
|
|
printf("x86bios: IVT 0x%06jx-0x%06jx at %p\n",
|
|
(vm_paddr_t)X86BIOS_IVT_BASE,
|
|
(vm_paddr_t)X86BIOS_IVT_SIZE + X86BIOS_IVT_BASE - 1,
|
|
x86bios_ivt);
|
|
printf("x86bios: SSEG 0x%06jx-0x%06jx at %p\n",
|
|
x86bios_seg_phys,
|
|
(vm_paddr_t)X86BIOS_SEG_SIZE + x86bios_seg_phys - 1,
|
|
x86bios_seg);
|
|
if (x86bios_rom_phys < X86BIOS_ROM_BASE)
|
|
printf("x86bios: EBDA 0x%06jx-0x%06jx at %p\n",
|
|
x86bios_rom_phys, (vm_paddr_t)X86BIOS_ROM_BASE - 1,
|
|
x86bios_rom);
|
|
printf("x86bios: ROM 0x%06jx-0x%06jx at %p\n",
|
|
(vm_paddr_t)X86BIOS_ROM_BASE,
|
|
(vm_paddr_t)X86BIOS_MEM_SIZE - X86BIOS_SEG_SIZE - 1,
|
|
(caddr_t)x86bios_rom + X86BIOS_ROM_BASE - x86bios_rom_phys);
|
|
}
|
|
|
|
return (0);
|
|
|
|
fail:
|
|
x86bios_unmap_mem();
|
|
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
x86bios_init(void)
|
|
{
|
|
|
|
mtx_init(&x86bios_lock, "x86bios lock", NULL, MTX_DEF);
|
|
|
|
if (x86bios_map_mem() != 0)
|
|
return (ENOMEM);
|
|
|
|
bzero(&x86bios_emu, sizeof(x86bios_emu));
|
|
|
|
x86bios_emu.emu_rdb = x86bios_emu_rdb;
|
|
x86bios_emu.emu_rdw = x86bios_emu_rdw;
|
|
x86bios_emu.emu_rdl = x86bios_emu_rdl;
|
|
x86bios_emu.emu_wrb = x86bios_emu_wrb;
|
|
x86bios_emu.emu_wrw = x86bios_emu_wrw;
|
|
x86bios_emu.emu_wrl = x86bios_emu_wrl;
|
|
|
|
x86bios_emu.emu_inb = x86bios_emu_inb;
|
|
x86bios_emu.emu_inw = x86bios_emu_inw;
|
|
x86bios_emu.emu_inl = x86bios_emu_inl;
|
|
x86bios_emu.emu_outb = x86bios_emu_outb;
|
|
x86bios_emu.emu_outw = x86bios_emu_outw;
|
|
x86bios_emu.emu_outl = x86bios_emu_outl;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
x86bios_uninit(void)
|
|
{
|
|
|
|
x86bios_unmap_mem();
|
|
mtx_destroy(&x86bios_lock);
|
|
|
|
return (0);
|
|
}
|
|
|
|
#endif
|
|
|
|
void *
|
|
x86bios_get_orm(uint32_t offset)
|
|
{
|
|
uint8_t *p;
|
|
|
|
/* Does the shadow ROM contain BIOS POST code for x86? */
|
|
p = x86bios_offset(offset);
|
|
if (p == NULL || p[0] != 0x55 || p[1] != 0xaa ||
|
|
(p[3] != 0xe9 && p[3] != 0xeb))
|
|
return (NULL);
|
|
|
|
return (p);
|
|
}
|
|
|
|
int
|
|
x86bios_match_device(uint32_t offset, device_t dev)
|
|
{
|
|
uint8_t *p;
|
|
uint16_t device, vendor;
|
|
uint8_t class, progif, subclass;
|
|
|
|
/* Does the shadow ROM contain BIOS POST code for x86? */
|
|
p = x86bios_get_orm(offset);
|
|
if (p == NULL)
|
|
return (0);
|
|
|
|
/* Does it contain PCI data structure? */
|
|
p += le16toh(*(uint16_t *)(p + 0x18));
|
|
if (bcmp(p, "PCIR", 4) != 0 ||
|
|
le16toh(*(uint16_t *)(p + 0x0a)) < 0x18 || *(p + 0x14) != 0)
|
|
return (0);
|
|
|
|
/* Does it match the vendor, device, and classcode? */
|
|
vendor = le16toh(*(uint16_t *)(p + 0x04));
|
|
device = le16toh(*(uint16_t *)(p + 0x06));
|
|
progif = *(p + 0x0d);
|
|
subclass = *(p + 0x0e);
|
|
class = *(p + 0x0f);
|
|
if (vendor != pci_get_vendor(dev) || device != pci_get_device(dev) ||
|
|
class != pci_get_class(dev) || subclass != pci_get_subclass(dev) ||
|
|
progif != pci_get_progif(dev))
|
|
return (0);
|
|
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
x86bios_modevent(module_t mod __unused, int type, void *data __unused)
|
|
{
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
return (x86bios_init());
|
|
case MOD_UNLOAD:
|
|
return (x86bios_uninit());
|
|
default:
|
|
return (ENOTSUP);
|
|
}
|
|
}
|
|
|
|
static moduledata_t x86bios_mod = {
|
|
"x86bios",
|
|
x86bios_modevent,
|
|
NULL,
|
|
};
|
|
|
|
DECLARE_MODULE(x86bios, x86bios_mod, SI_SUB_CPU, SI_ORDER_ANY);
|
|
MODULE_VERSION(x86bios, 1);
|