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Diffstat (limited to 'board/MAI/bios_emulator/bios.c')
-rw-r--r--board/MAI/bios_emulator/bios.c335
1 files changed, 0 insertions, 335 deletions
diff --git a/board/MAI/bios_emulator/bios.c b/board/MAI/bios_emulator/bios.c
deleted file mode 100644
index d51eb64..0000000
--- a/board/MAI/bios_emulator/bios.c
+++ /dev/null
@@ -1,335 +0,0 @@
-/*
- * Mostly done after the Scitech Bios emulation
- * Written by Hans-Jörg Frieden
- * Hyperion Entertainment
- */
-#include "x86emu.h"
-#include "glue.h"
-
-#undef DEBUG
-#ifdef DEBUG
-#define PRINTF(fmt, args...) printf(fmt, ## args)
-#else
-#define PRINTF(fmt, args...)
-#endif
-
-#define BIOS_SEG 0xFFF0
-#define PCIBIOS_SUCCESSFUL 0
-#define PCIBIOS_DEVICE_NOT_FOUND 0x86
-
-typedef unsigned char UBYTE;
-typedef unsigned short UWORD;
-typedef unsigned long ULONG;
-
-typedef char BYTE;
-typedef short WORT;
-typedef long LONG;
-
-static inline UBYTE read_byte(volatile UBYTE* from)
-{
- int x;
- asm volatile ("lbz %0,%1\n eieio" : "=r" (x) : "m" (*from));
- return (UBYTE)x;
-}
-
-static inline void write_byte(volatile UBYTE *to, int x)
-{
- asm volatile ("stb %1,%0\n eieio" : "=m" (*to) : "r" (x));
-}
-
-static inline UWORD read_word_little(volatile UWORD *from)
-{
- int x;
- asm volatile ("lhbrx %0,0,%1\n eieio" : "=r" (x) : "r" (from), "m" (*from));
- return (UWORD)x;
-}
-
-static inline UWORD read_word_big(volatile UWORD *from)
-{
- int x;
- asm volatile ("lhz %0,%1\n eieio" : "=r" (x) : "m" (*from));
- return (UWORD)x;
-}
-
-static inline void write_word_little(volatile UWORD *to, int x)
-{
- asm volatile ("sthbrx %1,0,%2\n eieio" : "=m" (*to) : "r" (x), "r" (to));
-}
-
-static inline void write_word_big(volatile UWORD *to, int x)
-{
- asm volatile ("sth %1,%0\n eieio" : "=m" (*to) : "r" (x));
-}
-
-static inline ULONG read_long_little(volatile ULONG *from)
-{
- unsigned long x;
- asm volatile ("lwbrx %0,0,%1\n eieio" : "=r" (x) : "r" (from), "m"(*from));
- return (ULONG)x;
-}
-
-static inline ULONG read_long_big(volatile ULONG *from)
-{
- unsigned long x;
- asm volatile ("lwz %0,%1\n eieio" : "=r" (x) : "m" (*from));
- return (ULONG)x;
-}
-
-static inline void write_long_little(volatile ULONG *to, ULONG x)
-{
- asm volatile ("stwbrx %1,0,%2\n eieio" : "=m" (*to) : "r" (x), "r" (to));
-}
-
-static inline void write_long_big(volatile ULONG *to, ULONG x)
-{
- asm volatile ("stw %1,%0\n eieio" : "=m" (*to) : "r" (x));
-}
-
-#define port_to_mem(from) (0xFE000000|(from))
-#define in_byte(from) read_byte( (UBYTE *)port_to_mem(from))
-#define in_word(from) read_word_little((UWORD *)port_to_mem(from))
-#define in_long(from) read_long_little((ULONG *)port_to_mem(from))
-#define out_byte(to, val) write_byte((UBYTE *)port_to_mem(to), val)
-#define out_word(to, val) write_word_little((UWORD *)port_to_mem(to), val)
-#define out_long(to, val) write_long_little((ULONG *)port_to_mem(to), val)
-
-static void X86API undefined_intr(int intno)
-{
- extern u16 A1_rdw(u32 addr);
- if (A1_rdw(intno * 4 + 2) == BIOS_SEG)
- {
- PRINTF("Undefined interrupt %xh called AX = %xh, BX = %xh, CX = %xh, DX = %xh\n",
- intno, M.x86.R_AX, M.x86.R_BX, M.x86.R_CX, M.x86.R_DX);
- X86EMU_halt_sys();
- }
- else
- {
- PRINTF("Calling interrupt %xh, AL=%xh, AH=%xh\n", intno, M.x86.R_AL, M.x86.R_AH);
- X86EMU_prepareForInt(intno);
- }
-}
-
-static void X86API int42(int intno);
-static void X86API int15(int intno);
-
-static void X86API int10(int intno)
-{
- if (A1_rdw(intno*4+2) == BIOS_SEG)
- int42(intno);
- else
- {
- PRINTF("int10: branching to %04X:%04X, AL=%xh, AH=%xh\n", A1_rdw(intno*4+2), A1_rdw(intno*4),
- M.x86.R_AL, M.x86.R_AH);
- X86EMU_prepareForInt(intno);
- }
-}
-
-static void X86API int1A(int intno)
-{
- int device;
-
- switch(M.x86.R_AX)
- {
- case 0xB101: /* PCI Bios Present? */
- M.x86.R_AL = 0x00;
- M.x86.R_EDX = 0x20494350;
- M.x86.R_BX = 0x0210;
- M.x86.R_CL = 3;
- CLEAR_FLAG(F_CF);
- break;
- case 0xB102: /* Find device */
- device = mypci_find_device(M.x86.R_DX, M.x86.R_CX, M.x86.R_SI);
- if (device != -1)
- {
- M.x86.R_AH = PCIBIOS_SUCCESSFUL;
- M.x86.R_BH = mypci_bus(device);
- M.x86.R_BL = mypci_devfn(device);
- }
- else
- {
- M.x86.R_AH = PCIBIOS_DEVICE_NOT_FOUND;
- }
- CONDITIONAL_SET_FLAG((M.x86.R_AH != PCIBIOS_SUCCESSFUL), F_CF);
- break;
- case 0xB103: /* Find PCI class code */
- M.x86.R_AH = PCIBIOS_DEVICE_NOT_FOUND;
- /*printf("Find by class not yet implmented"); */
- CONDITIONAL_SET_FLAG((M.x86.R_AH != PCIBIOS_SUCCESSFUL), F_CF);
- break;
- case 0xB108: /* read config byte */
- M.x86.R_CL = mypci_read_cfg_byte(M.x86.R_BH, M.x86.R_BL, M.x86.R_DI);
- M.x86.R_AH = PCIBIOS_SUCCESSFUL;
- CONDITIONAL_SET_FLAG((M.x86.R_AH != PCIBIOS_SUCCESSFUL), F_CF);
- /*printf("read_config_byte %x,%x,%x -> %x\n", M.x86.R_BH, M.x86.R_BL, M.x86.R_DI, */
- /* M.x86.R_CL); */
- break;
- case 0xB109: /* read config word */
- M.x86.R_CX = mypci_read_cfg_word(M.x86.R_BH, M.x86.R_BL, M.x86.R_DI);
- M.x86.R_AH = PCIBIOS_SUCCESSFUL;
- CONDITIONAL_SET_FLAG((M.x86.R_AH != PCIBIOS_SUCCESSFUL), F_CF);
- /*printf("read_config_word %x,%x,%x -> %x\n", M.x86.R_BH, M.x86.R_BL, M.x86.R_DI, */
- /* M.x86.R_CX); */
- break;
- case 0xB10A: /* read config dword */
- M.x86.R_ECX = mypci_read_cfg_long(M.x86.R_BH, M.x86.R_BL, M.x86.R_DI);
- M.x86.R_AH = PCIBIOS_SUCCESSFUL;
- CONDITIONAL_SET_FLAG((M.x86.R_AH != PCIBIOS_SUCCESSFUL), F_CF);
- /*printf("read_config_long %x,%x,%x -> %x\n", M.x86.R_BH, M.x86.R_BL, M.x86.R_DI, */
- /* M.x86.R_ECX); */
- break;
- case 0xB10B: /* write config byte */
- mypci_write_cfg_byte(M.x86.R_BH, M.x86.R_BL, M.x86.R_DI, M.x86.R_CL);
- M.x86.R_AH = PCIBIOS_SUCCESSFUL;
- CONDITIONAL_SET_FLAG((M.x86.R_AH != PCIBIOS_SUCCESSFUL), F_CF);
- /*printf("write_config_byte %x,%x,%x <- %x\n", M.x86.R_BH, M.x86.R_BL, M.x86.R_DI, */
- /* M.x86.R_CL); */
- break;
- case 0xB10C: /* write config word */
- mypci_write_cfg_word(M.x86.R_BH, M.x86.R_BL, M.x86.R_DI, M.x86.R_CX);
- M.x86.R_AH = PCIBIOS_SUCCESSFUL;
- CONDITIONAL_SET_FLAG((M.x86.R_AH != PCIBIOS_SUCCESSFUL), F_CF);
- /*printf("write_config_word %x,%x,%x <- %x\n", M.x86.R_BH, M.x86.R_BL, M.x86.R_DI, */
- /* M.x86.R_CX); */
- break;
- case 0xB10D: /* write config dword */
- mypci_write_cfg_long(M.x86.R_BH, M.x86.R_BL, M.x86.R_DI, M.x86.R_ECX);
- M.x86.R_AH = PCIBIOS_SUCCESSFUL;
- CONDITIONAL_SET_FLAG((M.x86.R_AH != PCIBIOS_SUCCESSFUL), F_CF);
- /*printf("write_config_long %x,%x,%x <- %x\n", M.x86.R_BH, M.x86.R_BL, M.x86.R_DI, */
- /* M.x86.R_ECX); */
- break;
- default:
- PRINTF("BIOS int %xh: Unknown function AX=%04xh\n", intno, M.x86.R_AX);
-
- }
-}
-
-void bios_init(void)
-{
- int i;
- X86EMU_intrFuncs bios_intr_tab[256];
-
- for (i=0; i<256; i++)
- {
- write_long_little(M.mem_base+i*4, BIOS_SEG<<16);
- bios_intr_tab[i] = undefined_intr;
- }
-
- bios_intr_tab[0x10] = int10;
- bios_intr_tab[0x1A] = int1A;
- bios_intr_tab[0x42] = int42;
- bios_intr_tab[0x15] = int15;
-
- bios_intr_tab[0x6D] = int42;
-
- X86EMU_setupIntrFuncs(bios_intr_tab);
- video_init();
-}
-
-unsigned char setup_40x25[] =
-{
- 0x38, 0x28, 0x2d, 0x0a, 0x1f, 6, 0x19,
- 0x1c, 2, 7, 6, 7, 0, 0, 0, 0
-};
-
-unsigned char setup_80x25[] =
-{
- 0x71, 0x50, 0x5a, 0x0a, 0x1f, 6, 0x19,
- 0x1c, 2, 7, 6, 7, 0, 0, 0, 0
-};
-
-unsigned char setup_graphics[] =
-{
- 0x38, 0x28, 0x20, 0x0a, 0x7f, 6, 0x64,
- 0x70, 2, 1, 6, 7, 0, 0, 0, 0
-};
-
-unsigned char setup_bw[] =
-{
- 0x61, 0x50, 0x52, 0x0f, 0x19, 6, 0x19,
- 0x19, 2, 0x0d, 0x0b, 0x0c, 0, 0, 0, 0
-};
-
-unsigned char * setup_modes[] =
-{
- setup_40x25, /* mode 0: 40x25 bw text */
- setup_40x25, /* mode 1: 40x25 col text */
- setup_80x25, /* mode 2: 80x25 bw text */
- setup_80x25, /* mode 3: 80x25 col text */
- setup_graphics, /* mode 4: 320x200 col graphics */
- setup_graphics, /* mode 5: 320x200 bw graphics */
- setup_graphics, /* mode 6: 640x200 bw graphics */
- setup_bw /* mode 7: 80x25 mono text */
-};
-
-unsigned int setup_cols[] =
-{
- 40, 40, 80, 80, 40, 40, 80, 80
-};
-
-unsigned char setup_modesets[] =
-{
- 0x2C, 0x28, 0x2D, 0x29, 0x2A, 0x2E, 0x1E, 0x29
-};
-
-unsigned int setup_bufsize[] =
-{
- 2048, 2048, 4096, 2096, 16384, 16384, 16384, 4096
-};
-
-void bios_set_mode(int mode)
-{
- int i;
- unsigned char mode_set = setup_modesets[mode]; /* Control register value */
- unsigned char *setup_regs = setup_modes[mode]; /* Register 3D4 Array */
-
- /* Switch video off */
- out_byte(0x3D8, mode_set & 0x37);
-
- /* Set up parameters at 3D4h */
- for (i=0; i<16; i++)
- {
- out_byte(0x3D4, (unsigned char)i);
- out_byte(0x3D5, *setup_regs);
- setup_regs++;
- }
-
- /* Enable video */
- out_byte(0x3D8, mode_set);
-
- /* Set overscan */
- if (mode == 6) out_byte(0x3D9, 0x3F);
- else out_byte(0x3D9, 0x30);
-}
-
-static void bios_print_string(void)
-{
- extern void video_bios_print_string(char *string, int x, int y, int attr, int count);
- char *s = (char *)(M.x86.R_ES<<4) + M.x86.R_BP;
- int attr;
- if (M.x86.R_AL & 0x02) attr = - 1;
- else attr = M.x86.R_BL;
- video_bios_print_string(s, M.x86.R_DH, M.x86.R_DL, attr, M.x86.R_CX);
-}
-
-static void X86API int42(int intno)
-{
- switch (M.x86.R_AH)
- {
- case 0x00:
- bios_set_mode(M.x86.R_AL);
- break;
- case 0x13:
- bios_print_string();
- break;
- default:
- PRINTF("Warning: VIDEO BIOS interrupt %xh unimplemented function %xh, AL = %xh\n",
- intno, M.x86.R_AH, M.x86.R_AL);
- }
-}
-
-static void X86API int15(int intno)
-{
- PRINTF("Called interrupt 15h: AX = %xh, BX = %xh, CX = %xh, DX = %xh\n",
- M.x86.R_AX, M.x86.R_BX, M.x86.R_CX, M.x86.R_DX);
-}
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