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Modified to comply with new way of mapping user space pages

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into the plex86 kernel module and VM.  mmap() is not used
  any more.
This commit is contained in:
Kevin Lawton 2003-01-09 04:03:36 +00:00
parent f45a747e59
commit 387dcf520f
2 changed files with 18 additions and 48 deletions
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59
bochs/plex86-interface.cc
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
//// $Id: plex86-interface.cc,v 1.5 2003-01-08 17:22:06 kevinlawton Exp $
//// $Id: plex86-interface.cc,v 1.6 2003-01-09 04:03:35 kevinlawton Exp $
///////////////////////////////////////////////////////////////////////////
////
//// Copyright (C) 2002 Kevin P. Lawton
@ -27,13 +27,18 @@
#define LOG_THIS genlog->
unsigned plex86State = 0;
int plex86FD = -1;
asm (".comm plex86PrintBufferPage,4096,4096");
asm (".comm plex86GuestCPUPage,4096,4096");
extern Bit8u plex86PrintBufferPage[];
extern Bit8u plex86GuestCPUPage[];
static Bit8u *plex86MemPtr = 0;
size_t plex86MemSize = 0;
Bit8u *plex86PrintBuffer = 0;
guest_cpu_t *plex86GuestCPU = 0;
static size_t plex86MemSize = 0;
static Bit8u *plex86PrintBuffer = plex86PrintBufferPage;
static guest_cpu_t *plex86GuestCPU = (guest_cpu_t *) plex86GuestCPUPage;
static void copyPlex86StateToBochs(BX_CPU_C *cpu);
static void copyBochsDescriptorToPlex86(descriptor_t *, bx_descriptor_t *);
@ -123,20 +128,10 @@ plex86TearDown(void)
plex86State &= ~Plex86StateMMapPhyMem;
if ( plex86State & Plex86StateMMapPrintBuffer ) {
fprintf(stderr, "plex86: unmapping print buffer.\n");
if (munmap(plex86PrintBuffer, 4096) != 0) {
perror("munmap of print buffer.");
return(0); // Failed.
}
}
plex86State &= ~Plex86StateMMapPrintBuffer;
if ( plex86State & Plex86StateMMapGuestCPU ) {
fprintf(stderr, "plex86: unmapping guest_cpu structure.\n");
if (munmap(plex86GuestCPU, 4096) != 0) {
perror("munmap of guest_cpu structure.");
return(0); // Failed.
}
}
plex86State &= ~Plex86StateMMapGuestCPU;
@ -446,7 +441,9 @@ plex86RegisterGuestMemory(Bit8u *vector, unsigned bytes)
return(0); // Error.
}
ioctlMsg.nMegs = bytes >> 20;
ioctlMsg.vector = vector;
ioctlMsg.guestPhyMemVector = (Bit32u) vector;
ioctlMsg.logBufferWindow = (Bit32u) plex86PrintBuffer;
ioctlMsg.guestCPUWindow = (Bit32u) plex86GuestCPU;
if (ioctl(plex86FD, PLEX86_REGISTER_MEMORY, &ioctlMsg) == -1) {
return(0); // Error.
}
@ -455,33 +452,9 @@ plex86RegisterGuestMemory(Bit8u *vector, unsigned bytes)
/* For now... */
plex86State |= Plex86StateMemAllocated;
plex86State |= Plex86StateMMapPhyMem;
// Create a memory mapping of the monitor's print buffer into
// user memory. This is used for efficient printing of info that
// the monitor prints out.
fprintf(stderr, "plex86: mapping monitor print buffer into user mem.\n");
plex86PrintBuffer = (Bit8u*) mmap(NULL, 4096, PROT_READ,
MAP_SHARED, plex86FD, plex86MemSize + 0*4096);
if (plex86PrintBuffer == (void *) -1) {
perror("mmap of monitor print buffer");
plex86TearDown();
return(0);
}
plex86State |= Plex86StateMMapPrintBuffer;
// Create a memory mapping of the monitor's guest_cpu structure into
// user memory. This is used for passing the guest_cpu state between
// user and kernel/monitor space.
fprintf(stderr, "plex86: mapping guest_cpu structure into user mem.\n");
plex86GuestCPU = (guest_cpu_t *) mmap(NULL, 4096, PROT_READ | PROT_WRITE,
MAP_SHARED, plex86FD, plex86MemSize + 1*4096);
if (plex86GuestCPU == (void *) -1) {
perror("mmap of guest_cpu structure");
plex86TearDown();
return(0);
}
plex86State |= Plex86StateMMapGuestCPU;
// No need to zero guest_cpu structure. Kernel module does that.
plex86State |= Plex86StateMMapPrintBuffer;
plex86State |= Plex86StateMMapGuestCPU;
// Zero out printbuffer and guestcpu here?
fprintf(stderr, "plex86: RegisterGuestMemory: %uMB succeeded.\n",
ioctlMsg.nMegs);

5
bochs/plex86-interface.h
View File

@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
//// $Id: plex86-interface.h,v 1.3 2003-01-08 17:22:07 kevinlawton Exp $
//// $Id: plex86-interface.h,v 1.4 2003-01-09 04:03:36 kevinlawton Exp $
///////////////////////////////////////////////////////////////////////////
////
//// Copyright (C) 2002 Kevin P. Lawton
@ -29,9 +29,6 @@
extern unsigned plex86State;
extern int plex86FD;
extern unsigned plex86MemSize;
extern Bit8u *plex86PrintBuffer;
extern guest_cpu_t *plex86GuestCPU;
extern unsigned plex86CpuInfo(BX_CPU_C *cpu);
extern unsigned plex86TearDown(void);