diff options
Diffstat (limited to 'i386/dos/i16')
| -rw-r--r-- | i386/dos/i16/gdt.h | 32 | ||||
| -rw-r--r-- | i386/dos/i16/gdt_sels.h | 36 | ||||
| -rw-r--r-- | i386/dos/i16/i16_crt0.S | 274 | ||||
| -rw-r--r-- | i386/dos/i16/i16_crt0.h | 32 | ||||
| -rw-r--r-- | i386/dos/i16/i16_dos.h | 146 | ||||
| -rw-r--r-- | i386/dos/i16/i16_dos_mem.c | 182 | ||||
| -rw-r--r-- | i386/dos/i16/i16_exit.c | 50 | ||||
| -rw-r--r-- | i386/dos/i16/i16_main.c | 60 | ||||
| -rw-r--r-- | i386/dos/i16/i16_putchar.c | 36 | ||||
| -rw-r--r-- | i386/dos/i16/i16_vcpi.c | 564 | ||||
| -rw-r--r-- | i386/dos/i16/i16_xms.c | 175 | ||||
| -rw-r--r-- | i386/dos/i16/idt.h | 39 | ||||
| -rw-r--r-- | i386/dos/i16/phys_mem_sources.h | 28 |
13 files changed, 0 insertions, 1654 deletions
diff --git a/i386/dos/i16/gdt.h b/i386/dos/i16/gdt.h deleted file mode 100644 index 3dad28b..0000000 --- a/i386/dos/i16/gdt.h +++ /dev/null @@ -1,32 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ -#ifndef _I386_DOS_GDT_ -#define _I386_DOS_GDT_ - -#define cpu_gdt_init_VCPI_CS(cpu) -#define cpu_gdt_init_VCPI_2(cpu) -#define cpu_gdt_init_VCPI_3(cpu) - -#include_next "gdt.h" - -#endif _I386_DOS_GDT_ diff --git a/i386/dos/i16/gdt_sels.h b/i386/dos/i16/gdt_sels.h deleted file mode 100644 index 25e7d96..0000000 --- a/i386/dos/i16/gdt_sels.h +++ /dev/null @@ -1,36 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -#include "config.h" - -#include_next "gdt_sels.h" - -#ifdef ENABLE_VCPI - -/* Segment descriptors for use by a VCPI server. */ -gdt_sel(VCPI_CS) -gdt_sel(VCPI_2) -gdt_sel(VCPI_3) - -#endif ENABLE_VCPI - diff --git a/i386/dos/i16/i16_crt0.S b/i386/dos/i16/i16_crt0.S deleted file mode 100644 index f21c6a6..0000000 --- a/i386/dos/i16/i16_crt0.S +++ /dev/null @@ -1,274 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -#include <mach/machine/asm.h> - -#include "config.h" -#include "i16_crt0.h" - - .code16 - .text - -ENTRY(i16_entry) - /* DOS starts us up with our stack pointer pointing - to the very top of our BSS segment. - ds and es point to the PSP. */ - -#define DELAY jmp 1f; 1: jmp 1f; 1: jmp 1f; 1: - - /* Check to make sure we're running on a 386 or higher - - _without_ using any 32-bit instructions of course. - Tricky, since gas doesn't support 16-bit addressing modes. :-) - We can't produce any 16-bit relocations either, - because ELF doesn't support them. - This code is basically straight out of the Pentium manual, - except gassed of coursed. */ - pushfw - DELAY - popw %bx - movw $0xfff,%ax - andw %bx,%ax - pushw %ax - DELAY - popfw - DELAY - pushfw - DELAY - popw %ax - and $0xf000,%ax - cmpw $0xf000,%ax - - je 1f - orw $0xf000,%bx - pushw %bx - DELAY - popfw - DELAY - pushfw - DELAY - popw %ax - andw $0xf000,%ax - jnz 4f -1: - /* Gak! We're running on an 8086/8088/80286! */ - callw 5f - .ascii "This program requires a 386 or better.\r\n\0" -5: popw %si - movw %cs,%ax - movw %ax,%ds - cld -2: lodsb - orb %al,%al - jz 3f - movb $0x02,%ah - movb %al,%dl - int $0x21 - jmp 2b -3: movw $0x4c02,%ax - int $0x21 -4: - /* Now we can use 32-bit instructions all we want. */ - - /* Save the PSP segment address (dx). */ - movw %ds,%dx - - /* Find our real-mode code segment (ax). */ - movw %cs,%ax - -#ifdef ENABLE_PAGE_ALIGNED_KERNEL - /* Move our code and data so that everything is on a page boundary. - Theoretically we _could_ go past the end of available memory, - since we're not checking, but it's enormously unlikely. */ - std - movw %ax,%ds - addw $0xff,%ax - andw $0xff00,%ax - movw %ax,%es - movl $EXT(edata),%ecx - subl $EXT(i16_entry_2),%ecx - movl $EXT(edata)-1,%esi - movw %si,%di - rep - movsb - - /* Start running at the new address. */ - pushl $EXT(i16_entry_2) - movw %ax,2(%esp) - lretw - -ENTRY(i16_entry_2) - /* We're now page aligned. */ -#endif ENABLE_PAGE_ALIGNED_KERNEL - - /* Load the data segment registers appropriately. */ - movw %ax,%es - movw %ax,%ss - - /* Start using a real stack. */ - movl $EXT(crt0_stack)+CRT0_STACK_SIZE,%esp - - /* Clear our BSS segment. */ - movl $EXT(edata),%edi - movl $EXT(end),%ecx - subw %di,%cx - xorb %al,%al - cld - rep - stosb - - /* Find the size of the environment array (si) - and the number of environment variables plus one (bx). - The PSP segment is still in dx. */ - movw %dx,%ds - movw 0x2c,%ds - xorw %si,%si -1: lodsb - orb %al,%al - jnz 1b - lodsb - orb %al,%al - jnz 1b - - /* Allocate space for the environment array on the stack. - Also make sure the top 16 bits of ESP are cleared, - and that the stack pointer is longword aligned. */ - subw %si,%sp - andl $0x0000fffc,%esp - - /* Copy the environment array to the local stack. - We present it backwards, but big deal - shouldn't matter. */ - xorl %edi,%edi - movw %sp,%di - xorl %esi,%esi - pushl %esi - jmp 3f -2: pushl %edi - stosb -1: lodsb - stosb - orb %al,%al - jnz 1b -3: lodsb - orb %al,%al - jnz 2b - movl %esp,%cs:EXT(environ) - - /* Copy the program name to the local stack; - it will be used as argv[0]. */ - lodsw - movw %si,%bx -1: pushw $0 - lodsb - orb %al,%al - jz 2f - lodsb - orb %al,%al - jnz 1b -2: movw %bx,%si - movw %sp,%di -3: lodsb - stosb - orb %al,%al - jnz 3b - movl %esp,%ebp - - /* Build argv[1..n] from the command tail in the PSP. - Count the arguments in ebx. */ - movw %dx,%ds - xorl %ecx,%ecx - xorl %ebx,%ebx - movb 0x80,%cl /* get size of command tail */ - incw %cx /* plus the return character */ - movw $0x80,%si - addw %cx,%si /* si = ptr to return character */ - movw %sp,%di - decw %di - subw %cx,%sp /* allocate space on the stack */ - andw $0xfffc,%sp - pushl %ebx - std -1: xorb %al,%al /* store a null terminator for this arg */ - stosb - incl %ebx -2: cmpw $0x80,%si - je 5f - lodsb /* scan backwards for the end of an arg */ - cmpb $0x20,%al - jbe 2b -3: stosb /* copy the arg */ - cmpw $0x80,%si - je 4f - lodsb - cmpb $0x20,%al - ja 3b -4: movw %di,%cx /* push an arg pointer */ - incw %cx - pushl %ecx - jmp 1b -5: - - /* Push the argv[0] pointer. */ - pushl %ebp - - /* Push the argument and envirnonment parameters on the stack. */ - movl %esp,%eax - pushl %cs:EXT(environ) - pushl %eax - pushl %ebx - - /* Release all conventional memory above the top of our BSS. - The PSP segment is still in dx. */ - movl $EXT(end)+15,%ebx - shrw $4,%bx - movw %cs,%ax - addw %ax,%bx - subw %dx,%bx - movw %dx,%es - movb $0x4a,%ah - int $0x21 - - /* Load the normal data segment registers. */ - movw %cs,%ax - movw %ax,%ds - movw %ax,%es - - /* GCC wants the direction flag cleared at all times. */ - cld - - /* Initialize the bss and run the program. */ - call EXT(i16_main) - - .globl EXT(crt0_stack) - .comm EXT(crt0_stack),CRT0_STACK_SIZE - - .globl EXT(environ) - .comm EXT(environ),4 - - - .data - - .section .anno,"aw",@progbits - P2ALIGN(4) - .globl __ANNO_START__ -__ANNO_START__: - diff --git a/i386/dos/i16/i16_crt0.h b/i386/dos/i16/i16_crt0.h deleted file mode 100644 index 352d1cb..0000000 --- a/i386/dos/i16/i16_crt0.h +++ /dev/null @@ -1,32 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ -#ifndef _I386_DOS_I16_CRT0_H_ -#define _I386_DOS_I16_CRT0_H_ - -#define CRT0_STACK_SIZE 4096 - -#ifndef ASSEMBLER -extern char crt0_stack[CRT0_STACK_SIZE]; -#endif - -#endif _I386_DOS_I16_CRT0_H_ diff --git a/i386/dos/i16/i16_dos.h b/i386/dos/i16/i16_dos.h deleted file mode 100644 index 27b0ca4..0000000 --- a/i386/dos/i16/i16_dos.h +++ /dev/null @@ -1,146 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ -#ifndef _I16DOS_H_ -#define _I16DOS_H_ - -#include <mach/inline.h> -#include <mach/machine/far_ptr.h> - - -/* Returns 16-bit DOS version number: - major version number in high byte, minor in low byte. */ -MACH_INLINE unsigned short i16_dos_version(void) -{ - unsigned short dos_version_swapped; - asm volatile("int $0x21" : "=a" (dos_version_swapped) : "a" (0x3000)); - return (dos_version_swapped >> 8) | (dos_version_swapped << 8); -} - -MACH_INLINE void i16_dos_putchar(int c) -{ - asm volatile("int $0x21" : : "a" (0x0200), "d" (c)); -} - -MACH_INLINE void i16_dos_exit(int rc) -{ - asm volatile("int $0x21" : : "a" (0x4c00 | (rc & 0xff))); -} - -MACH_INLINE void i16_dos_get_int_vec(int vecnum, struct far_pointer_16 *out_vec) -{ - asm volatile(" - pushw %%es - int $0x21 - movw %%es,%0 - popw %%es - " : "=r" (out_vec->seg), "=b" (out_vec->ofs) - : "a" (0x3500 | vecnum)); -} - -MACH_INLINE void i16_dos_set_int_vec(int vecnum, struct far_pointer_16 *new_vec) -{ - asm volatile(" - pushw %%ds - movw %1,%%ds - int $0x21 - popw %%ds - " : - : "a" (0x2500 | vecnum), - "r" (new_vec->seg), "d" (new_vec->ofs)); -} - -/* Open a DOS file and return the new file handle. - Returns -1 if an error occurs. */ -MACH_INLINE int i16_dos_open(const char *filename, int access) -{ - int fh; - asm volatile(" - int $0x21 - jnc 1f - movl $-1,%%eax - 1: - " : "=a" (fh) : "a" (0x3d00 | access), "d" (filename)); - return fh; -} - -MACH_INLINE void i16_dos_close(int fh) -{ - asm volatile("int $0x21" : : "a" (0x3e00), "b" (fh)); -} - -MACH_INLINE int i16_dos_get_device_info(int fh) -{ - int info_word; - asm volatile(" - int $0x21 - jnc 1f - movl $-1,%%edx - 1: - " : "=d" (info_word) : "a" (0x4400), "b" (fh), "d" (0)); - return info_word; -} - -MACH_INLINE int i16_dos_get_output_status(int fh) -{ - int status; - asm volatile(" - int $0x21 - movzbl %%al,%%eax - jnc 1f - movl $-1,%%eax - 1: - " : "=a" (status) : "a" (0x4407), "b" (fh)); - return status; -} - -MACH_INLINE int i16_dos_alloc(unsigned short *inout_paras) -{ - int seg; - asm volatile(" - int $0x21 - jnc 1f - movl $-1,%%eax - 1: - " : "=a" (seg), "=b" (*inout_paras) - : "a" (0x4800), "b" (*inout_paras)); - return seg; -} - -MACH_INLINE int i16_dos_free(unsigned short seg) -{ - asm volatile(" - pushw %%es - movw %1,%%es - int $0x21 - popw %%es - " : : "a" (0x4900), "r" (seg) : "eax"); -} - -MACH_INLINE unsigned short i16_dos_get_psp_seg(void) -{ - unsigned short psp_seg; - asm volatile("int $0x21" : "=b" (psp_seg) : "a" (0x6200)); - return psp_seg; -} - -#endif _I16DOS_H_ diff --git a/i386/dos/i16/i16_dos_mem.c b/i386/dos/i16/i16_dos_mem.c deleted file mode 100644 index e78398d..0000000 --- a/i386/dos/i16/i16_dos_mem.c +++ /dev/null @@ -1,182 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -#include <mach/machine/code16.h> -#include <mach/machine/vm_types.h> - -#include "i16_dos.h" -#include "config.h" - - - -/* These aren't static because vcpi and dpmi code need to grab DOS memory - before we've switched to protected mode and memory has been collected. */ -vm_offset_t dos_mem_phys_free_mem; -vm_size_t dos_mem_phys_free_size; - - -CODE32 - -void dos_mem_collect(void) -{ - if (dos_mem_phys_free_mem) - { - phys_mem_add(dos_mem_phys_free_mem, dos_mem_phys_free_size); - dos_mem_phys_free_mem = 0; - } -} - -CODE16 - -void i16_dos_mem_check() -{ - unsigned short paras = 0xf000; - int dos_mem_seg; - - /* Allocate as big a chunk of memory as we can find. */ - do - { - if (paras == 0) - return; - dos_mem_seg = i16_dos_alloc(¶s); - } - while (dos_mem_seg < 0); - - dos_mem_phys_free_mem = dos_mem_seg << 4; - dos_mem_phys_free_size = paras << 4; - -#ifdef ENABLE_CODE_CHECK - i16_code_copy(); -#endif -} - - -#ifdef ENABLE_CODE_CHECK - -/* Big humongo kludge to help in finding random code-trashing bugs. - We copy the entire text segment upon initialization, - and then check it later as necessary. */ - -#include <mach/machine/proc_reg.h> -#include "vm_param.h" - -extern char etext[], i16_entry_2[]; - -static int code_copy_seg; - -static int i16_code_copy() -{ - int text_size = (int)etext & ~0xf; - int i; - - if (dos_mem_phys_free_size < text_size) - return; - - code_copy_seg = dos_mem_phys_free_mem >> 4; - dos_mem_phys_free_mem += text_size; - dos_mem_phys_free_size -= text_size; - - set_fs(code_copy_seg); - for (i = 0; i < text_size; i += 4) - asm volatile(" - movl (%%ebx),%%eax - movl %%eax,%%fs:(%%ebx) - " : : "b" (i) : "eax"); -} - -void i16_code_check(int dummy) -{ - int text_size = (int)etext & ~0xf; - int i, old, new; - int found = 0; - - if (!code_copy_seg) - return; - - set_fs(code_copy_seg); - for (i = (int)i16_entry_2; i < text_size; i += 4) - { - asm volatile(" - movl (%%ebx),%%eax - movl %%fs:(%%ebx),%%ecx - " : "=a" (new), "=c" (old) : "b" (i)); - if (old != new) - { - found = 1; - i16_writehexw(i); - i16_putchar(' '); - i16_writehexl(old); - i16_putchar(' '); - i16_writehexl(new); - i16_putchar('\r'); - i16_putchar('\n'); - } - } - if (found) - { - code_copy_seg = 0; - i16_writehexl((&dummy)[-1]); - i16_die(" DOS extender code trashed!"); - } -} - -CODE32 - -void code_check(int dummy) -{ - int text_size = (int)etext & ~0xf; - unsigned char *new = 0, *old = (void*)phystokv(code_copy_seg*16); - int found = 0; - int i; - - if (!code_copy_seg) - return; - - for (i = (int)i16_entry_2; (i < text_size) && (found < 10); i++) - { - /* In several places we have to self-modify an int instruction, - or the segment value in an absolute long jmp instruction, - so ignore any changes preceded by those opcodes. */ - if ((new[i] != old[i]) - && (old[i-1] != 0xcd) - && (old[i-6] != 0xea)) - { - if (!found) - { - found = 1; - about_to_die(1); - } - printf("%08x addr %04x was %02x now %02x\n", - (&dummy)[-1], i, old[i], new[i]); - } - } - if (found) - { - code_copy_seg = 0; - die("%08x DOS extender code trashed!", (&dummy)[-1]); - } -} - -CODE16 - -#endif ENABLE_CODE_CHECK diff --git a/i386/dos/i16/i16_exit.c b/i386/dos/i16/i16_exit.c deleted file mode 100644 index 04b943c..0000000 --- a/i386/dos/i16/i16_exit.c +++ /dev/null @@ -1,50 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -#include <mach/machine/code16.h> - -#include "config.h" -#include "i16_dos.h" - - -CODE16 - -void i16_exit(int rc) -{ - /* Clean up properly. */ - i16_ext_mem_shutdown(); - i16_xms_shutdown(); -#ifdef ENABLE_VCPI - i16_vcpi_shutdown(); -#endif -#ifdef ENABLE_DPMI - i16_dpmi_shutdown(); -#endif -#ifdef ENABLE_CODE_CHECK - i16_code_check(); -#endif - - /* Call the DOS exit function. */ - i16_dos_exit(rc); -} - diff --git a/i386/dos/i16/i16_main.c b/i386/dos/i16/i16_main.c deleted file mode 100644 index 5558d09..0000000 --- a/i386/dos/i16/i16_main.c +++ /dev/null @@ -1,60 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -#include <mach/machine/code16.h> - -#include "config.h" -#include "i16_dos.h" - - -CODE16 - -int argc; -char **argv; - -void i16_main(int _argc, char **_argv) -{ - argc = _argc; - argv = _argv; - - i16_init(); - - /* Make sure we're running on a good enough DOS version. */ - if (i16_dos_version() < 0x300) - i16_die("DOS 3.00 or higher required."); - - /* See if we're running in a DPMI or VCPI environment. - If either of these are successful, they don't return. */ - i16_dos_mem_check(); -#ifdef ENABLE_DPMI - i16_dpmi_check(); -#endif - i16_xms_check(); - i16_ext_mem_check(); -#ifdef ENABLE_VCPI - i16_vcpi_check(); -#endif - - i16_raw_start(); -} - diff --git a/i386/dos/i16/i16_putchar.c b/i386/dos/i16/i16_putchar.c deleted file mode 100644 index 911cbe4..0000000 --- a/i386/dos/i16/i16_putchar.c +++ /dev/null @@ -1,36 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -#include <mach/machine/code16.h> - -#include "i16_dos.h" - -CODE16 - -void i16_putchar(int ch) -{ - if (ch == '\n') - i16_dos_putchar('\r'); - i16_dos_putchar(ch); -} - diff --git a/i386/dos/i16/i16_vcpi.c b/i386/dos/i16/i16_vcpi.c deleted file mode 100644 index e021d6b..0000000 --- a/i386/dos/i16/i16_vcpi.c +++ /dev/null @@ -1,564 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -#include <mach/boolean.h> -#include <mach/vm_param.h> -#include <mach/machine/code16.h> -#include <mach/machine/vm_types.h> -#include <mach/machine/paging.h> -#include <mach/machine/eflags.h> -#include <mach/machine/proc_reg.h> -#include <mach/machine/far_ptr.h> -#include <mach/machine/vcpi.h> -#include <mach/machine/asm.h> - -#include "config.h" -#include "i16.h" -#include "i16_dos.h" -#include "cpu.h" -#include "real.h" -#include "debug.h" -#include "vm_param.h" - -#ifdef ENABLE_VCPI - -static boolean_t ems_page_allocated; -static unsigned short ems_handle; - -static vm_offset_t vcpi_pdir, vcpi_ptable0; - -struct far_pointer_32 vcpi_pmode_entry = {0, VCPI_CS}; -struct vcpi_switch_data vcpi_switch_data; - -static struct pseudo_descriptor gdt_pdesc, idt_pdesc; - -static boolean_t pic_reprogrammed; - -/* Save area for the DOS interrupt vectors - that used to be in the place we relocated the master PIC to. */ -static struct far_pointer_16 master_save_vecs[8]; - - -#ifdef ENABLE_PAGING -#define VCPI_PAGING_INIT(pdir_pa, first_unmapped_pa) vcpi_paging_init(pdir_pa, first_unmapped_pa) -#else -#define VCPI_PAGING_INIT(pdir_pa, first_unmapped_pa) ((void)0) -#endif - -#ifdef ENABLE_KERNEL_LDT -#define KERNEL_LDT_INIT() (vcpi_switch_data.ldt_sel = KERNEL_LDT) -#else -#define KERNEL_LDT_INIT() ((void)0) -#endif - - -CODE16 - -static void i16_vcpi_switch_to_pmode() -{ - extern vm_offset_t boot_image_pa; - - i16_cli(); - - i16_assert(i16_get_ds() == i16_get_cs()); - i16_assert(i16_get_es() == i16_get_cs()); - i16_assert(i16_get_ss() == i16_get_cs()); - - /* Make sure the TSS isn't marked busy. */ - cpu[0].tables.gdt[KERNEL_TSS_IDX].access &= ~ACC_TSS_BUSY; - - /* Ask the VCPI server to switch to protected mode. */ - asm volatile(" - movl %%esp,%%edx - int $0x67 - "SEXT(pmode_return)": - movl %%edx,%%esp - movw %2,%%dx - movw %%dx,%%ss - movw %%dx,%%ds - movw %%dx,%%es - xorw %%dx,%%dx - movw %%dx,%%fs - movw %%dx,%%gs - " : - : "a" ((unsigned short)0xde0c), - "S" (boot_image_pa + (vm_offset_t)&vcpi_switch_data), - "i" (KERNEL_DS) - : "eax", "edx", "esi"); - - /* Make sure the direction flag is still clear. */ - i16_cld(); -} - -static void i16_vcpi_switch_to_real_mode() -{ - i16_cli(); - - /* As requested by VCPI spec... */ - i16_clts(); - - /* Perform the switch. */ - asm volatile(" - movl %%esp,%%edx - pushl %1 - pushl %1 - pushl %1 - pushl %1 - pushl %1 - pushl %%edx - pushl $0 - pushl %1 - pushl $1f - movw %2,%%ds - lcall %%ss:"SEXT(vcpi_pmode_entry)" - 1: - " : - : "a" ((unsigned short)0xde0c), - "r" ((unsigned)real_cs), - "r" ((unsigned short)LINEAR_DS) - : "eax", "edx"); - - i16_assert(!(i16_get_eflags() & EFL_IF)); - i16_assert(i16_get_ds() == i16_get_cs()); - i16_assert(i16_get_es() == i16_get_cs()); - i16_assert(i16_get_ss() == i16_get_cs()); - - /* Make sure the direction flag is still clear. */ - i16_cld(); -} - -CODE32 - -static void vcpi_real_int(int intnum, struct real_call_data *rcd) -{ - do_16bit( - unsigned int eflags; - - i16_vcpi_switch_to_real_mode(); - i16_real_int(intnum, rcd); - i16_vcpi_switch_to_pmode(); - ); -} - -static void vcpi_exit(int rc) -{ - do_16bit( - i16_vcpi_switch_to_real_mode(); - i16_exit(rc); - while (1); - ); -} - -CODE16 - -static inline void -i16_vcpi_set_int_vecs(unsigned short master, unsigned short slave) -{ - unsigned short rc; - - i16_assert(!(get_eflags() & EFL_IF)); - asm volatile("int $0x67" - : "=a" (rc) - : "a" ((unsigned short)0xde0b), - "b" ((unsigned short)master), - "c" ((unsigned short)slave)); - i16_assert((rc & 0xff00) == 0); - i16_assert(!(get_eflags() & EFL_IF)); -} - -/* Find a (hopefully) empty set of interrupt vectors - to use for the master hardware interrupts. - We assume that eight interrupt vectors in a row - that all have the same value are unused. - If VCPI servers weren't so brain-damaged - and took care of this during interrupt reflection - (like we do when running in raw mode), - this kludgery wouldn't be needed... */ -static int i16_find_free_vec_range() -{ - /* i will track the first vector in a range; - j will track the last. */ - int i, j; - struct far_pointer_16 iv, jv; - - j = 0xff; - i16_dos_get_int_vec(j, &jv); - - for (i = j-1; ; i--) - { - if (i == 0x50) - { - /* No completely free sets found. - Stop here and just use 0x50-0x57. */ - break; - } - - i16_dos_get_int_vec(i, &iv); - if ((iv.ofs != jv.ofs) || (iv.seg != jv.seg)) - { - /* Vector contents changed. */ - j = i; - jv = iv; - continue; - } - - if ((j-i+1 >= 8) && ((i & 7) == 0)) - { - /* Found a free range. */ - break; - } - } - - return i; -} - -void i16_vcpi_check() -{ - extern vm_offset_t dos_mem_phys_free_mem; - extern vm_offset_t dos_mem_phys_free_size; - extern void pmode_return(); - extern vm_offset_t boot_image_pa; - extern void (*i16_switch_to_real_mode)(); - extern void (*i16_switch_to_pmode)(); - - unsigned short rc; - unsigned short first_free_pte; - unsigned short vcpi_ver; - - i16_assert(boot_image_pa == kvtophys(0)); - - /* Check for presence of EMM driver. */ - { - int dev_info, out_status; - int fh; - - fh = i16_dos_open("EMMXXXX0", 0); - if (fh < 0) - return; - dev_info = i16_dos_get_device_info(fh); - out_status = i16_dos_get_output_status(fh); - i16_dos_close(fh); - if ((dev_info < 0) || !(dev_info & 0x80) - || (out_status != 0xff)) - return; - } - - /* Allocate an EMS page to force the EMM to be turned on. - If it fails, keep going anyway - - it may simply mean all the EMS pages are allocated. */ - asm volatile("int $0x67" - : "=a" (rc), - "=d" (ems_handle) - : "a" ((unsigned short)0x4300), - "b" ((unsigned short)1)); - if (!(rc & 0xff00)) - ems_page_allocated = TRUE; - - /* Check for VCPI. */ - asm volatile("int $0x67" : "=a" (rc), "=b" (vcpi_ver) : "a" ((unsigned short)0xde00)); - if (rc & 0xff00) - return; - i16_assert(vcpi_ver >= 0x0100); - - /* OK, it's there - we're now committed to using VCPI. */ - i16_switch_to_real_mode = i16_vcpi_switch_to_real_mode; - i16_switch_to_pmode = i16_vcpi_switch_to_pmode; - real_int = vcpi_real_int; - real_exit = vcpi_exit; - - do_debug(i16_puts("VCPI detected")); - - /* Allocate a page directory and page table from low DOS memory. */ - { - vm_offset_t new_dos_mem; - - new_dos_mem = ((dos_mem_phys_free_mem + PAGE_MASK) & ~PAGE_MASK) - + PAGE_SIZE*2; - if ((!dos_mem_phys_free_mem) - || (new_dos_mem - dos_mem_phys_free_mem - > dos_mem_phys_free_size)) - i16_die("not enough low DOS memory available"); - dos_mem_phys_free_size -= new_dos_mem - dos_mem_phys_free_mem; - dos_mem_phys_free_mem = new_dos_mem; - vcpi_pdir = new_dos_mem - PAGE_SIZE*2; - vcpi_ptable0 = vcpi_pdir + PAGE_SIZE; - } - - /* Initialize them. */ - { - int i; - pt_entry_t pde0 = vcpi_ptable0 - | INTEL_PTE_VALID | INTEL_PTE_WRITE | INTEL_PTE_USER; - - set_fs(vcpi_pdir >> 4); - asm volatile("movl %0,%%fs:(0)" : : "r" (pde0)); - for (i = 1; i < NPDES + NPTES; i++) - asm volatile("movl $0,%%fs:(,%0,4)" : : "r" (i)); - } - - /* Initialize the protected-mode interface. */ - asm volatile(" - pushw %%es - movw %4,%%es - int $0x67 - popw %%es - " - : "=a" (rc), - "=b" (vcpi_pmode_entry.ofs), - "=D" (first_free_pte) - : "a" ((unsigned short)0xde01), - "r" ((unsigned short)(vcpi_ptable0 >> 4)), - "D" (0), - "S" (&cpu[0].tables.gdt[VCPI_CS_IDX])); - i16_assert((rc & 0xff00) == 0); - i16_assert(get_ds() == get_cs()); - i16_assert(get_es() == get_cs()); - -#ifdef DEBUG - /* Sanity check: make sure the server did what it was supposed to do. */ - - i16_assert((cpu[0].tables.gdt[VCPI_CS_IDX].access & ACC_P|ACC_CODE) == ACC_P|ACC_CODE); - if (cpu[0].tables.gdt[VCPI_CS_IDX].granularity & SZ_G) - i16_assert(vcpi_pmode_entry.ofs < - (((vm_offset_t)cpu[0].tables.gdt[VCPI_CS_IDX].limit_high << 28) - | ((vm_offset_t)cpu[0].tables.gdt[VCPI_CS_IDX].limit_low << 12) - | (vm_offset_t)0xfff)); - else - i16_assert(vcpi_pmode_entry.ofs < - (((vm_offset_t)cpu[0].tables.gdt[VCPI_CS_IDX].limit_high << 16) - | (vm_offset_t)cpu[0].tables.gdt[VCPI_CS_IDX].limit_low)); - - i16_assert(first_free_pte/sizeof(pt_entry_t) >= 1*1024*1024/PAGE_SIZE); - i16_assert(first_free_pte/sizeof(pt_entry_t) <= 4*1024*1024/PAGE_SIZE); - - { - int i; - - for (i = 0; i < 1*1024*1024/PAGE_SIZE; i++) - { - pt_entry_t entry; - - set_ds(vcpi_ptable0 >> 4); - entry = ((pt_entry_t*)0)[i]; - set_ds(get_cs()); - i16_assert(entry & INTEL_PTE_VALID); - if (i < 0xf0000/PAGE_SIZE) - i16_assert(entry & INTEL_PTE_WRITE); - i16_assert(entry & INTEL_PTE_USER); - i16_assert(!(entry & INTEL_PTE_AVAIL)); - } - } -#endif /* DEBUG */ - - /* Find the VCPI server's hardware interrupt vector mappings. */ - asm volatile("int $0x67" - : "=a" (rc), - "=b" (irq_master_base), - "=c" (irq_slave_base) - : "a" ((unsigned short)0xde0a)); - i16_assert((rc & 0xff00) == 0); - irq_master_base &= 0xffff; - irq_slave_base &= 0xffff; - i16_assert((irq_master_base & 7) == 0); - i16_assert((irq_master_base == 0x08) || (irq_master_base >= 0x20)); - i16_assert((irq_slave_base & 7) == 0); - i16_assert(irq_slave_base >= 0x20); - - /* If they're the usual DOS values, change them. */ - if (irq_master_base == 0x08) - { - pic_reprogrammed = TRUE; - - i16_cli(); - - irq_master_base = i16_find_free_vec_range(); - - /* Save the old vectors in that range - and set them to a copy of vectors 8-15. */ - { - int i; - - for (i = 0; i < 8; i++) - { - struct far_pointer_16 hw_vec; - - i16_dos_get_int_vec(irq_master_base+i, - &master_save_vecs[i]); - i16_dos_get_int_vec(0x08+i, &hw_vec); - i16_dos_set_int_vec(irq_master_base+i, &hw_vec); - } - } - - /* Reprogram the PIC. */ - i16_pic_set_master(irq_master_base); - - /* Inform the VCPI server. */ - i16_vcpi_set_int_vecs(irq_master_base, irq_slave_base); - } - - /* Initialize the switch-to-pmode data structure. */ - vcpi_switch_data.phys_pdir = vcpi_pdir; - vcpi_switch_data.lin_gdt = boot_image_pa+(vm_offset_t)&gdt_pdesc.limit; - vcpi_switch_data.lin_idt = boot_image_pa+(vm_offset_t)&idt_pdesc.limit; - vcpi_switch_data.tss_sel = KERNEL_TSS; - vcpi_switch_data.entry_eip = (unsigned short)(vm_offset_t)&pmode_return; - vcpi_switch_data.entry_cs = KERNEL_16_CS; - - /* Initialize the GDT and IDT pseudo-descriptors. */ - gdt_pdesc.limit = sizeof(cpu[0].tables.gdt)-1; - gdt_pdesc.linear_base = boot_image_pa + (vm_offset_t)&cpu[0].tables.gdt; - idt_pdesc.limit = sizeof(cpu[0].tables.idt)-1; - idt_pdesc.linear_base = boot_image_pa + (vm_offset_t)&cpu[0].tables.idt; - - /* Set the GDT to temporary settings - just for getting into pmode the first time. */ - i16_gdt_init_temp(); - - /* VCPI insists on loading a TSS immediately on entering pmode, - so initialize the KERNEL_TSS descriptor in the GDT. */ - i16_fill_gdt_descriptor(&cpu[0], KERNEL_TSS, - boot_image_pa + (vm_offset_t)&cpu[0].tables.tss, - sizeof(cpu[0].tables.tss)-1, - ACC_PL_K|ACC_TSS, 0); - cpu[0].tables.tss.io_bit_map_offset = sizeof(cpu[0].tables.tss); - -#if 0 - /* Dump the various VCPI data structures, for debugging. */ - { - int i; - - i16_puts("Switch data"); - i16_writehexl(switch_data.phys_pdir); i16_putchar(' '); - i16_writehexl(switch_data.lin_gdt); i16_putchar(' '); - i16_writehexl(switch_data.lin_idt); i16_putchar(' '); - i16_writehexw(switch_data.ldt_sel); i16_putchar(' '); - i16_writehexw(switch_data.tss_sel); i16_putchar(' '); - i16_writehexl(switch_data.entry_eip); i16_putchar(' '); - i16_writehexw(switch_data.entry_cs); i16_puts(""); - - i16_puts("GDT pdesc"); - i16_writehexw(gdt_pdesc.limit); i16_putchar(' '); - i16_writehexl(gdt_pdesc.linear_base); i16_puts(""); - - i16_puts("IDT pdesc"); - i16_writehexw(idt_pdesc.limit); i16_putchar(' '); - i16_writehexl(idt_pdesc.linear_base); i16_puts(""); - - i16_puts("GDT"); - for (i = 0; i < GDTSZ; i++) - { - i16_writehexw(i*8); i16_putchar(' '); - i16_writehexll(*((long long*)&cpu[0].tables.gdt[i])); - i16_puts(""); - } - } -#endif - - /* Switch into pmode briefly to initialize the CPU tables and such. */ - i16_vcpi_switch_to_pmode(); - i16_do_32bit( - - /* Note that right now we can only access the first 1MB of memory, - because paging is enabled and that's the only memory region that's been mapped. - The rest of physical memory won't be mapped until VCPI_PAGING_INIT, - but VCPI_PAGING_INIT requires allocating memory for page tables, - and we can't call phys_mem_collect() to provide memory to the allocator - until all physical memory can be read and written. - To get out of this catch-22, - we call dos_mem_collect() beforehand here - to make low DOS memory available for allocation by VCPI_PAGING_INIT. - The call to phys_mem_collect() later will cause dos_mem_collect - to be called a second time, but it'll just do nothing then. */ - dos_mem_collect(); - - /* Initialize the basic CPU tables. */ - cpu_init(&cpu[0]); - - /* Initialize the paging system. */ - VCPI_PAGING_INIT(vcpi_pdir, (vm_offset_t)first_free_pte / 4 * PAGE_SIZE); - - /* Now that we can access all physical memory, - collect the remaining memory regions we discovered while in 16-bit mode - and add them to our free memory list. */ - phys_mem_collect(); - - /* Initialize the hardware interrupt vectors in the IDT. */ - idt_irq_init(); - - /* Now that we have an initialized LDT descriptor, start using it. */ - KERNEL_LDT_INIT(); - - /* Switch to real mode and back again once more, - to make sure everything's loaded properly. */ - do_16bit( - i16_vcpi_switch_to_real_mode(); - i16_vcpi_switch_to_pmode(); - ); - - vcpi_start(); - ); -} - -/* Shouldn't be necessary, but just in case the end of the above function, - containing the .code16, gets "optimized away"... */ -CODE16 - -void i16_vcpi_shutdown() -{ - if (pic_reprogrammed) - { - pic_reprogrammed = FALSE; - - i16_cli(); - - i16_assert(irq_master_base >= 0x20); - - /* Reprogram the PIC. */ - i16_pic_set_master(0x08); - - /* Inform the VCPI server. */ - i16_vcpi_set_int_vecs(0x08, irq_slave_base); - - /* Restore the old interrupt vectors. */ - { - int i; - - for (i = 0; i < 8; i++) - { - i16_dos_set_int_vec(irq_master_base+i, - &master_save_vecs[i]); - } - } - - i16_sti(); - } - - if (ems_page_allocated) - { - ems_page_allocated = 0; - asm volatile("int $0x67" : : "a" (0x4500), "d" (ems_handle)); - } -} - -#endif ENABLE_VCPI - diff --git a/i386/dos/i16/i16_xms.c b/i386/dos/i16/i16_xms.c deleted file mode 100644 index ba75d5c..0000000 --- a/i386/dos/i16/i16_xms.c +++ /dev/null @@ -1,175 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -#include <mach/machine/code16.h> -#include <mach/machine/vm_types.h> -#include <mach/machine/far_ptr.h> -#include <mach/machine/asm.h> - -#include "i16_a20.h" -#include "phys_mem.h" -#include "debug.h" - - -struct far_pointer_16 xms_control; - -#define CALL_XMS "lcallw "SEXT(xms_control) - - -static vm_offset_t xms_phys_free_mem; -static vm_size_t xms_phys_free_size; - -static short free_handle; -static char free_handle_allocated; -static char free_handle_locked; - - -CODE32 - -void xms_mem_collect(void) -{ - if (xms_phys_free_mem) - { - phys_mem_add(xms_phys_free_mem, xms_phys_free_size); - xms_phys_free_mem = 0; - } -} - -CODE16 - -static void i16_xms_enable_a20(void) -{ - short success; - asm volatile(CALL_XMS : "=a" (success) : "a" (0x0500) : "ebx"); - if (!success) - i16_die("XMS error: can't enable A20 line"); -} - -static void i16_xms_disable_a20(void) -{ - short success; - asm volatile(CALL_XMS : "=a" (success) : "a" (0x0600) : "ebx"); - if (!success) - i16_die("XMS error: can't disable A20 line"); -} - -void i16_xms_check() -{ - unsigned short rc; - unsigned short free_k; - - /* Check for an XMS server. */ - asm volatile(" - int $0x2f - " : "=a" (rc) - : "a" (0x4300)); - if ((rc & 0xff) != 0x80) - return; - - /* Get XMS driver's control function. */ - asm volatile(" - pushl %%ds - pushl %%es - int $0x2f - movw %%es,%0 - popl %%es - popl %%ds - " : "=r" (xms_control.seg), "=b" (xms_control.ofs) - : "a" (0x4310)); - - /* See how much memory is available. */ - asm volatile(CALL_XMS - : "=a" (free_k) - : "a" (0x0800) - : "ebx", "edx"); - if (free_k * 1024 == 0) - return; - - xms_phys_free_size = (unsigned)free_k * 1024; - - /* Grab the biggest memory block we can get. */ - asm volatile(CALL_XMS - : "=a" (rc), "=d" (free_handle) - : "a" (0x0900), "d" (free_k) - : "ebx"); - if (!rc) - i16_die("XMS error: can't allocate extended memory"); - - free_handle_allocated = 1; - - /* Lock it down. */ - asm volatile(CALL_XMS " - shll $16,%%edx - movw %%bx,%%dx - " : "=a" (rc), "=d" (xms_phys_free_mem) - : "a" (0x0c00), "d" (free_handle) - : "ebx"); - if (!rc) - i16_die("XMS error: can't lock down extended memory"); - - free_handle_locked = 1; - - /* We need to update phys_mem_max here - instead of just letting phys_mem_add() do it - when the memory is collected with phys_mem_collect(), - because VCPI initialization needs to know the top of physical memory - before phys_mem_collect() is called. - See i16_vcpi.c for the gross details. */ - if (phys_mem_max < xms_phys_free_mem + xms_phys_free_size) - phys_mem_max = xms_phys_free_mem + xms_phys_free_size; - - i16_enable_a20 = i16_xms_enable_a20; - i16_disable_a20 = i16_xms_disable_a20; - - do_debug(i16_puts("XMS detected")); -} - -void i16_xms_shutdown() -{ - unsigned short rc; - - if (free_handle_locked) - { - /* Unlock our memory block. */ - asm volatile(CALL_XMS - : "=a" (rc) - : "a" (0x0d00), "d" (free_handle) - : "ebx"); - free_handle_locked = 0; - if (!rc) - i16_die("XMS error: can't unlock extended memory"); - } - - if (free_handle_allocated) - { - /* Free the memory block. */ - asm volatile(CALL_XMS - : "=a" (rc) - : "a" (0x0a00), "d" (free_handle) - : "ebx"); - free_handle_allocated = 0; - if (!rc) - i16_die("XMS error: can't free extended memory"); - } -} - diff --git a/i386/dos/i16/idt.h b/i386/dos/i16/idt.h deleted file mode 100644 index 5469196..0000000 --- a/i386/dos/i16/idt.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ -#ifndef _I386_DOS_IDT_ -#define _I386_DOS_IDT_ - -#include "config.h" - -#ifdef ENABLE_VCPI - -/* We need a maximum-size IDT in order to run as a VCPI client, - because someone else may already have reprogrammed the PIC - to point to any set of vectors. */ -#define IDTSZ 256 - -#endif ENABLE_VCPI - -#include_next "idt.h" - -#endif _I386_DOS_IDT_ diff --git a/i386/dos/i16/phys_mem_sources.h b/i386/dos/i16/phys_mem_sources.h deleted file mode 100644 index 249e14a..0000000 --- a/i386/dos/i16/phys_mem_sources.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * Copyright (c) 1995-1994 The University of Utah and - * the Computer Systems Laboratory at the University of Utah (CSL). - * All rights reserved. - * - * Permission to use, copy, modify and distribute this software is hereby - * granted provided that (1) source code retains these copyright, permission, - * and disclaimer notices, and (2) redistributions including binaries - * reproduce the notices in supporting documentation, and (3) all advertising - * materials mentioning features or use of this software display the following - * acknowledgement: ``This product includes software developed by the - * Computer Systems Laboratory at the University of Utah.'' - * - * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS - * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF - * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * CSL requests users of this software to return to csl-dist@cs.utah.edu any - * improvements that they make and grant CSL redistribution rights. - * - * Author: Bryan Ford, University of Utah CSL - */ - -pms(dos_mem) -pms(xms_mem) -/*pms(vcpi_mem) XXX */ - -#include_next "phys_mem_sources.h" |