mirror of https://github.com/mpv-player/mpv
504 lines
13 KiB
C
504 lines
13 KiB
C
/*
|
|
This file contains implementation of VESA library which is based on
|
|
LRMI (Linux real-mode interface).
|
|
So it's not an emulator - it calls real int 10h handler under Linux.
|
|
Note: VESA is available only on x86 systems.
|
|
You can redistribute this file under terms and conditions
|
|
GNU General Public licence v2.
|
|
Written by Nick Kurshev <nickols_k@mail.ru>
|
|
*/
|
|
#include "vbelib.h"
|
|
#include "lrmi.h"
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <sys/io.h>
|
|
#include <ctype.h>
|
|
|
|
static struct VesaProtModeInterface vbe_pm_info;
|
|
|
|
static inline int VERR(const void *p)
|
|
{
|
|
register int retval;
|
|
__asm __volatile(
|
|
"xorl %0, %0\n\t"
|
|
"verr %1\n\t"
|
|
"setnz %b0"
|
|
:"=r"(retval)
|
|
:"m"(*(unsigned char *)p)
|
|
:"memory");
|
|
return retval;
|
|
}
|
|
|
|
#if 0
|
|
static inline int VERW(const void *p)
|
|
{
|
|
register int retval;
|
|
__asm __volatile(
|
|
"xorl %0, %0\n\t"
|
|
"verw %1\n\t"
|
|
"setnz %b0"
|
|
:"=r"(retval)
|
|
:"m"(*(unsigned char *)p)
|
|
:"memory");
|
|
return retval;
|
|
}
|
|
#endif
|
|
|
|
#define HAVE_VERBOSE_VAR 1
|
|
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
extern int verbose;
|
|
|
|
static void __dump_regs(struct LRMI_regs *r)
|
|
{
|
|
printf("vbelib: eax=%08lXh ebx=%08lXh ecx=%08lXh edx=%08lXh\n"
|
|
"vbelib: edi=%08lXh esi=%08lXh ebp=%08lXh esp=%08lXh\n"
|
|
"vbelib: ds=%04Xh es=%04Xh ss=%04Xh cs:ip=%04X:%04X\n"
|
|
"vbelib: fs=%04Xh gs=%04Xh ss:sp=%04X:%04X flags=%04X\n"
|
|
,(unsigned long)r->eax,(unsigned long)r->ebx,(unsigned long)r->ecx,(unsigned long)r->edx
|
|
,(unsigned long)r->edi,(unsigned long)r->esi,(unsigned long)r->ebp,(unsigned long)r->reserved
|
|
,r->ds,r->es,r->ss,r->cs,r->ip
|
|
,r->fs,r->gs,r->ss,r->sp,r->flags);
|
|
}
|
|
|
|
static inline int VBE_LRMI_int(int int_no, struct LRMI_regs *r)
|
|
{
|
|
int retval;
|
|
if(verbose > 1)
|
|
{
|
|
printf("vbelib: registers before int %02X\n",int_no);
|
|
__dump_regs(r);
|
|
}
|
|
retval = LRMI_int(int_no,r);
|
|
if(verbose > 1)
|
|
{
|
|
printf("vbelib: Interrupt handler returns: %X\n",retval);
|
|
printf("vbelib: registers after int %02X\n",int_no);
|
|
__dump_regs(r);
|
|
}
|
|
return retval;
|
|
}
|
|
#else
|
|
#define VBE_LRMI_int(int_no,regs) (VBE_LRMI_int(int_no,regs))
|
|
#endif
|
|
|
|
static unsigned hh_int_10_seg;
|
|
int vbeInit( void )
|
|
{
|
|
unsigned short iopl_port;
|
|
size_t i;
|
|
if(!LRMI_init()) return VBE_VM86_FAIL;
|
|
/*
|
|
Allow read/write to ALL io ports
|
|
*/
|
|
hh_int_10_seg = *(unsigned short *)PhysToVirtSO(0x0000,0x0042);
|
|
/* Video BIOS should be at C000:0000 and above */
|
|
hh_int_10_seg >>= 12;
|
|
if(hh_int_10_seg < 0xC) return VBE_BROKEN_BIOS;
|
|
ioperm(0, 1024, 1);
|
|
iopl(3);
|
|
memset(&vbe_pm_info,0,sizeof(struct VesaProtModeInterface));
|
|
vbeGetProtModeInfo(&vbe_pm_info);
|
|
i = 0;
|
|
while((iopl_port=vbe_pm_info.iopl_ports[i++]) != 0xFFFF) ioperm(iopl_port,1,1);
|
|
iopl(3);
|
|
return VBE_OK;
|
|
}
|
|
|
|
int vbeDestroy( void ) { return VBE_OK; }
|
|
|
|
/* Fixme!!! This code is compatible only with mplayer's version of lrmi*/
|
|
static inline int is_addr_valid(const void *p)
|
|
{
|
|
return (p < (const void *)0x502) ||
|
|
(p >= (const void *)0x10000 && p < (const void *)0x20000) ||
|
|
(p >= (const void *)0xa0000 && p < (const void *)0x100000);
|
|
}
|
|
|
|
static int check_str(const unsigned char *str)
|
|
{
|
|
size_t i;
|
|
int null_found = 0;
|
|
for(i = 0;i < 256;i++)
|
|
{
|
|
if(is_addr_valid(&str[i]))
|
|
{
|
|
if(VERR(&str[i]))
|
|
{
|
|
if(!str[i]) { null_found = 1; break; }
|
|
}
|
|
else break;
|
|
}
|
|
else break;
|
|
}
|
|
return null_found;
|
|
}
|
|
|
|
static int check_wrd(const unsigned short *str)
|
|
{
|
|
size_t i;
|
|
int ffff_found = 0;
|
|
for(i = 0;i < 1024;i++)
|
|
{
|
|
if(is_addr_valid(&str[i]))
|
|
{
|
|
if(VERR(&str[i]))
|
|
{
|
|
if(str[i] == 0xffff) { ffff_found = 1; break; }
|
|
}
|
|
else break;
|
|
}
|
|
else break;
|
|
}
|
|
return ffff_found;
|
|
}
|
|
|
|
static void print_str(unsigned char *str)
|
|
{
|
|
size_t i;
|
|
fflush(stdout);
|
|
printf("vbelib: ");
|
|
for(i = 0;i < 256;i++) { printf("%02X(%c) ",str[i],isprint(str[i])?str[i]:'.'); if(!str[i]) break; }
|
|
printf("\n");
|
|
fflush(stdout);
|
|
}
|
|
|
|
static void print_wrd(unsigned short *str)
|
|
{
|
|
size_t i;
|
|
fflush(stdout);
|
|
printf("vbelib: ");
|
|
for(i = 0;i < 256;i++) { printf("%04X ",str[i]); if(str[i] == 0xffff) break; }
|
|
printf("\n");
|
|
fflush(stdout);
|
|
}
|
|
|
|
int vbeGetControllerInfo(struct VbeInfoBlock *data)
|
|
{
|
|
struct LRMI_regs r;
|
|
void *rm_space;
|
|
int retval;
|
|
if(!(rm_space = LRMI_alloc_real(sizeof(struct VbeInfoBlock)))) return VBE_OUT_OF_DOS_MEM;
|
|
memcpy(rm_space,data,sizeof(struct VbeInfoBlock));
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
r.eax = 0x4f00;
|
|
r.es = VirtToPhysSeg(rm_space);
|
|
r.edi = VirtToPhysOff(rm_space);
|
|
if(!VBE_LRMI_int(0x10,&r))
|
|
{
|
|
LRMI_free_real(rm_space);
|
|
return VBE_VM86_FAIL;
|
|
}
|
|
retval = r.eax & 0xffff;
|
|
if(retval == 0x4f)
|
|
{
|
|
FarPtr fpdata;
|
|
retval = VBE_OK;
|
|
memcpy(data,rm_space,sizeof(struct VbeInfoBlock));
|
|
fpdata.seg = (unsigned long)(data->OemStringPtr) >> 16;
|
|
fpdata.off = (unsigned long)(data->OemStringPtr) & 0xffff;
|
|
data->OemStringPtr = PhysToVirt(fpdata);
|
|
if(!check_str(data->OemStringPtr)) data->OemStringPtr = NULL;
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
if(verbose > 1)
|
|
{
|
|
printf("vbelib: OemStringPtr=%04X:%04X => %p\n",fpdata.seg,fpdata.off,data->OemStringPtr);
|
|
if(data->OemStringPtr) print_str(data->OemStringPtr);
|
|
fflush(stdout);
|
|
}
|
|
#endif
|
|
fpdata.seg = (unsigned long)(data->VideoModePtr) >> 16;
|
|
fpdata.off = (unsigned long)(data->VideoModePtr) & 0xffff;
|
|
data->VideoModePtr = PhysToVirt(fpdata);
|
|
if(!check_wrd(data->VideoModePtr))
|
|
{
|
|
data->VideoModePtr = NULL;
|
|
retval = VBE_BROKEN_BIOS;
|
|
}
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
if(verbose > 1)
|
|
{
|
|
printf("vbelib: VideoModePtr=%04X:%04X => %p\n",fpdata.seg,fpdata.off,data->VideoModePtr);
|
|
if(data->VideoModePtr) print_wrd(data->VideoModePtr);
|
|
fflush(stdout);
|
|
}
|
|
#endif
|
|
fpdata.seg = (unsigned long)(data->OemVendorNamePtr) >> 16;
|
|
fpdata.off = (unsigned long)(data->OemVendorNamePtr) & 0xffff;
|
|
data->OemVendorNamePtr = PhysToVirt(fpdata);
|
|
if(!check_str(data->OemVendorNamePtr)) data->OemVendorNamePtr = NULL;
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
if(verbose > 1)
|
|
{
|
|
printf("vbelib: OemVendorNamePtr=%04X:%04X => %p\n",fpdata.seg,fpdata.off,data->OemVendorNamePtr);
|
|
if(data->OemVendorNamePtr) print_str(data->OemVendorNamePtr);
|
|
fflush(stdout);
|
|
}
|
|
#endif
|
|
fpdata.seg = (unsigned long)(data->OemProductNamePtr) >> 16;
|
|
fpdata.off = (unsigned long)(data->OemProductNamePtr) & 0xffff;
|
|
data->OemProductNamePtr = PhysToVirt(fpdata);
|
|
if(!check_str(data->OemProductNamePtr)) data->OemProductNamePtr = NULL;
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
if(verbose > 1)
|
|
{
|
|
printf("vbelib: OemProductNamePtr=%04X:%04X => %p\n",fpdata.seg,fpdata.off,data->OemProductNamePtr);
|
|
if(data->OemVendorNamePtr) print_str(data->OemProductNamePtr);
|
|
fflush(stdout);
|
|
}
|
|
#endif
|
|
fpdata.seg = (unsigned long)(data->OemProductRevPtr) >> 16;
|
|
fpdata.off = (unsigned long)(data->OemProductRevPtr) & 0xffff;
|
|
data->OemProductRevPtr = PhysToVirt(fpdata);
|
|
if(!check_str(data->OemProductRevPtr)) data->OemProductRevPtr = NULL;
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
if(verbose > 1)
|
|
{
|
|
printf("vbelib: OemProductRevPtr=%04X:%04X => %p\n",fpdata.seg,fpdata.off,data->OemProductRevPtr);
|
|
if(data->OemProductRevPtr) print_str(data->OemProductRevPtr);
|
|
fflush(stdout);
|
|
}
|
|
#endif
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
int vbeGetModeInfo(unsigned mode,struct VesaModeInfoBlock *data)
|
|
{
|
|
struct LRMI_regs r;
|
|
void *rm_space;
|
|
int retval;
|
|
if(!(rm_space = LRMI_alloc_real(sizeof(struct VesaModeInfoBlock)))) return VBE_OUT_OF_DOS_MEM;
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
r.eax = 0x4f01;
|
|
r.ecx = mode;
|
|
r.es = VirtToPhysSeg(rm_space);
|
|
r.edi = VirtToPhysOff(rm_space);
|
|
if(!VBE_LRMI_int(0x10,&r))
|
|
{
|
|
LRMI_free_real(rm_space);
|
|
return VBE_VM86_FAIL;
|
|
}
|
|
retval = r.eax & 0xffff;
|
|
if(retval == 0x4f)
|
|
{
|
|
retval = VBE_OK;
|
|
memcpy(data,rm_space,sizeof(struct VesaModeInfoBlock));
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
int vbeSetMode(unsigned mode,struct VesaCRTCInfoBlock *data)
|
|
{
|
|
struct LRMI_regs r;
|
|
void *rm_space = NULL;
|
|
int retval;
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
if(data)
|
|
{
|
|
if(!(rm_space = LRMI_alloc_real(sizeof(struct VesaCRTCInfoBlock)))) return VBE_OUT_OF_DOS_MEM;
|
|
r.es = VirtToPhysSeg(rm_space);
|
|
r.edi = VirtToPhysOff(rm_space);
|
|
memcpy(rm_space,data,sizeof(struct VesaCRTCInfoBlock));
|
|
}
|
|
r.eax = 0x4f02;
|
|
r.ebx = mode;
|
|
retval = VBE_LRMI_int(0x10,&r);
|
|
if(rm_space) LRMI_free_real(rm_space);
|
|
if(!retval) return VBE_VM86_FAIL;
|
|
retval = r.eax & 0xffff;
|
|
if(retval == 0x4f) retval = VBE_OK;
|
|
return retval;
|
|
}
|
|
|
|
int vbeGetMode(unsigned *mode)
|
|
{
|
|
struct LRMI_regs r;
|
|
int retval;
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
r.eax = 0x4f03;
|
|
if(!VBE_LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
|
|
retval = r.eax & 0xffff;
|
|
if(retval == 0x4f)
|
|
{
|
|
*mode = r.ebx;
|
|
retval = VBE_OK;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
int vbeSaveState(void **data)
|
|
{
|
|
struct LRMI_regs r;
|
|
int retval;
|
|
void *rm_space;
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
r.eax = 0x4f04;
|
|
r.edx = 0x00;
|
|
r.ecx = 0x0f;
|
|
if(!VBE_LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
|
|
retval = r.eax & 0xffff;
|
|
if(retval != 0x4f) return retval;
|
|
if(!(rm_space = LRMI_alloc_real((r.ebx & 0xffff)*64))) return VBE_OUT_OF_DOS_MEM;
|
|
r.eax = 0x4f04;
|
|
r.edx = 0x01;
|
|
r.ecx = 0x0f;
|
|
r.es = VirtToPhysSeg(rm_space);
|
|
r.ebx = VirtToPhysOff(rm_space);
|
|
if(!VBE_LRMI_int(0x10,&r))
|
|
{
|
|
LRMI_free_real(rm_space);
|
|
return VBE_VM86_FAIL;
|
|
}
|
|
retval = r.eax & 0xffff;
|
|
if(retval != 0x4f)
|
|
{
|
|
LRMI_free_real(rm_space);
|
|
return retval;
|
|
}
|
|
*data = rm_space;
|
|
return VBE_OK;
|
|
}
|
|
|
|
int vbeRestoreState(void *data)
|
|
{
|
|
struct LRMI_regs r;
|
|
int retval;
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
r.eax = 0x4f04;
|
|
r.edx = 0x02;
|
|
r.ecx = 0x0f;
|
|
r.es = VirtToPhysSeg(data);
|
|
r.ebx = VirtToPhysOff(data);
|
|
retval = VBE_LRMI_int(0x10,&r);
|
|
LRMI_free_real(data);
|
|
if(!retval) return VBE_VM86_FAIL;
|
|
retval = r.eax & 0xffff;
|
|
if(retval == 0x4f) retval = VBE_OK;
|
|
return retval;
|
|
}
|
|
|
|
int vbeGetWindow(unsigned *win_num)
|
|
{
|
|
struct LRMI_regs r;
|
|
int retval;
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
r.eax = 0x4f05;
|
|
r.ebx = (*win_num & 0x0f) | 0x0100;
|
|
if(!VBE_LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
|
|
retval = r.eax & 0xffff;
|
|
if(retval == 0x4f)
|
|
{
|
|
*win_num = r.edx & 0xffff;
|
|
retval = VBE_OK;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
int vbeSetWindow(unsigned win_num,unsigned win_gran)
|
|
{
|
|
int retval;
|
|
if(vbe_pm_info.SetWindowCall)
|
|
{
|
|
/* Don't verbose this stuff from performance reasons */
|
|
/* 32-bit function call is much better of int 10h */
|
|
__asm __volatile(
|
|
"pushl %%ebx\n"
|
|
"movl %1, %%ebx\n"
|
|
::"a"(0x4f05),"S"(win_num & 0x0f),"d"(win_gran):"memory");
|
|
(*vbe_pm_info.SetWindowCall)();
|
|
__asm __volatile("popl %%ebx":::"memory");
|
|
retval = VBE_OK;
|
|
}
|
|
else
|
|
{
|
|
struct LRMI_regs r;
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
r.eax = 0x4f05;
|
|
r.ebx = win_num & 0x0f;
|
|
r.edx = win_gran;
|
|
if(!VBE_LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
|
|
retval = r.eax & 0xffff;
|
|
if(retval == 0x4f) retval = VBE_OK;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
struct realVesaProtModeInterface
|
|
{
|
|
unsigned short SetWindowCall;
|
|
unsigned short SetDisplayStart;
|
|
unsigned short SetPaletteData;
|
|
unsigned short iopl_ports;
|
|
}__attribute__((packed));
|
|
|
|
int vbeGetProtModeInfo(struct VesaProtModeInterface *pm_info)
|
|
{
|
|
struct LRMI_regs r;
|
|
int retval;
|
|
unsigned info_offset;
|
|
struct realVesaProtModeInterface *rm_info;
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
r.eax = 0x4f0a;
|
|
r.ebx = 0;
|
|
if(!VBE_LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
|
|
retval = r.eax & 0xffff;
|
|
if(retval == 0x4f)
|
|
{
|
|
retval = VBE_OK;
|
|
info_offset = r.edi&0xffff;
|
|
if((r.es >> 12) != hh_int_10_seg) retval = VBE_BROKEN_BIOS;
|
|
rm_info = PhysToVirtSO(r.es,info_offset);
|
|
pm_info->SetWindowCall = PhysToVirtSO(r.es,info_offset+rm_info->SetWindowCall);
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
if(verbose > 1) printf("vbelib: SetWindowCall=%04X:%04X => %p\n",r.es,info_offset+rm_info->SetWindowCall,pm_info->SetWindowCall);
|
|
#endif
|
|
pm_info->SetDisplayStart = PhysToVirtSO(r.es,info_offset+rm_info->SetDisplayStart);
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
if(verbose > 1) printf("vbelib: SetDisplayStart=%04X:%04X => %p\n",r.es,info_offset+rm_info->SetDisplayStart,pm_info->SetDisplayStart);
|
|
#endif
|
|
pm_info->SetPaletteData = PhysToVirtSO(r.es,info_offset+rm_info->SetPaletteData);
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
if(verbose > 1) printf("vbelib: SetPaletteData=%04X:%04X => %p\n",r.es,info_offset+rm_info->SetPaletteData,pm_info->SetPaletteData);
|
|
#endif
|
|
pm_info->iopl_ports = PhysToVirtSO(r.es,info_offset+rm_info->iopl_ports);
|
|
if(!check_wrd(pm_info->iopl_ports))
|
|
{
|
|
pm_info->iopl_ports = NULL;
|
|
retval = VBE_BROKEN_BIOS;
|
|
}
|
|
#ifdef HAVE_VERBOSE_VAR
|
|
if(verbose > 1)
|
|
{
|
|
printf("vbelib: iopl_ports=%04X:%04X => %p\n",r.es,info_offset+rm_info->iopl_ports,pm_info->iopl_ports);
|
|
if(pm_info->iopl_ports) print_wrd(pm_info->iopl_ports);
|
|
fflush(stdout);
|
|
}
|
|
#endif
|
|
}
|
|
return retval;
|
|
}
|
|
/* --------- Standard VGA stuff -------------- */
|
|
int vbeWriteString(int x, int y, int attr, char *str)
|
|
{
|
|
struct LRMI_regs r;
|
|
void *rm_space = NULL;
|
|
int retval;
|
|
memset(&r,0,sizeof(struct LRMI_regs));
|
|
r.ecx = strlen(str);
|
|
r.edx = ((y<<8)&0xff00)|(x&0xff);
|
|
r.ebx = attr;
|
|
if(!(rm_space = LRMI_alloc_real(r.ecx))) return VBE_OUT_OF_DOS_MEM;
|
|
r.es = VirtToPhysSeg(rm_space);
|
|
r.ebp = VirtToPhysOff(rm_space);
|
|
memcpy(rm_space,str,r.ecx);
|
|
r.eax = 0x1300;
|
|
retval = VBE_LRMI_int(0x10,&r);
|
|
if(rm_space) LRMI_free_real(rm_space);
|
|
if(!retval) return VBE_VM86_FAIL;
|
|
retval = r.eax & 0xffff;
|
|
if(retval == 0x4f) retval = VBE_OK;
|
|
return retval;
|
|
}
|