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modified to support NetBSD x86emu

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This commit is contained in:
Markus Fröschle
2015-02-17 19:29:20 +00:00
parent b0d4f69662
commit 5fbfbe0b10
2 changed files with 29 additions and 27 deletions
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2
BaS_gcc/Makefile
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@@ -30,7 +30,7 @@ RANLIB=$(TCPREFIX)ranlib
NATIVECC=gcc
ifeq (Y,$(COMPILE_ELF))
LDLIBS=-L/usr/lib/gcc/m68k-elf/4.9.2/m5475 -lgcc
LDLIBS=-L/usr/lib/gcc/m68k-elf/4.6.4/m5475 -lgcc
else
LDLIBS=-L/usr/lib/gcc/m68k-atari-mint/4.6.4/m5475 -lgcc
endif

54
BaS_gcc/x86emu/x86biosemu.c
View File

@@ -5,6 +5,7 @@
#include "util.h"
#include "driver_mem.h"
#include "x86emu.h"
#include "x86emu_regs.h"
#include "pci.h"
#include "pci_ids.h"
@@ -86,21 +87,22 @@ uint32_t getIntVect(int num)
}
/* FixME: There is already a push_word() in the emulator */
void pushw(uint16_t val)
void pushw(struct X86EMU *emu, uint16_t val)
{
X86_ESP -= 2;
MEM_WW(((uint32_t) X86_SS << 4) + X86_SP, val);
emu->x86.R_ESP -= 2;
MEM_WW(((uint32_t) emu->x86.R_SS << 4) + emu->x86.R_SP, val);
}
int run_bios_int(int num)
int run_bios_int(struct X86EMU *emu, int num)
{
uint32_t eflags;
eflags = X86_EFLAGS;
pushw(eflags);
pushw(X86_CS);
pushw(X86_IP);
X86_CS = MEM_RW((num << 2) + 2);
X86_IP = MEM_RW(num << 2);
eflags = emu->x86.R_EFLG;
pushw(emu, eflags);
pushw(emu, emu->x86.R_CS);
pushw(emu, emu->x86.R_IP);
emu->x86.R_CS = MEM_RW((num << 2) + 2);
emu->x86.R_IP = MEM_RW(num << 2);
return 1;
}
@@ -207,7 +209,7 @@ void outl(uint32_t val, uint16_t port)
/* Interrupt multiplexer */
void do_int(int num)
void do_int(struct X86EMU *emu, int num)
{
int ret = 0;
@@ -246,7 +248,7 @@ void do_int(int num)
break;
}
if (!ret)
ret = run_bios_int(num);
ret = run_bios_int(emu, num);
}
static int setup_system_bios(void *base_addr)
@@ -352,9 +354,9 @@ void run_bios(struct radeonfb_info *rinfo)
X86EMU_setMemBase((void *) biosmem, SIZE_EMU);
for (i = 0; i < 256; i++)
intFuncs[i] = do_int;
emu._X86EMU_intrTab[i] = do_int;
X86EMU_setupIntrFuncs(intFuncs);
X86EMU_setupIntrFuncs(emu._X86EMU_intrTab);
{
char *date = "01/01/99";
for (i = 0; date[i]; i++)
@@ -371,30 +373,30 @@ void run_bios(struct radeonfb_info *rinfo)
// setup_int_vect();
/* cpu setup */
X86_AX = devfn ? devfn : 0xff;
X86_DX = 0x80;
X86_EIP = initialip;
X86_CS = initialcs;
emu.x86.R_AX = devfn ? devfn : 0xff;
emu.x86.R_DX = 0x80;
emu.x86.R_EIP = initialip;
emu.x86.R_CS = initialcs;
/* Initialize stack and data segment */
X86_SS = initialcs;
X86_SP = 0xfffe;
X86_DS = 0x0040;
X86_ES = 0x0000;
emu.x86.R_SS = initialcs;
emu.x86.R_SP = 0xfffe;
emu.x86.R_DS = 0x0040;
emu.x86.R_ES = 0x0000;
/*
* We need a sane way to return from bios
* execution. A hlt instruction and a pointer
* to it, both kept on the stack, will do.
*/
pushw(0xf4f4); /* hlt; hlt */
pushw(&emu, 0xf4f4); /* hlt; hlt */
// pushw(0x10cd); /* int #0x10 */
// pushw(0x0013); /* 320 x 200 x 256 colors */
// // pushw(0x000F); /* 640 x 350 x mono */
// pushw(0xb890); /* nop, mov ax,#0x13 */
pushw(X86_SS);
pushw(X86_SP + 2);
pushw(&emu, emu.x86.R_SS);
pushw(&emu, emu.x86.R_SP + 2);
#ifdef DBG_X86EMU
X86EMU_trace_on();
X86EMU_set_debug(DEBUG_DECODE_F | DEBUG_TRACE_F);
@@ -402,7 +404,7 @@ void run_bios(struct radeonfb_info *rinfo)
dbg("%s: X86EMU entering emulator\r\n", __FUNCTION__);
//*vblsem = 0;
X86EMU_exec();
X86EMU_exec(&emu);
//*vblsem = 1;
dbg("%s: X86EMU halted\r\n", __FUNCTION__);
// biosfn_set_video_mode(0x13); /* 320 x 200 x 256 colors */