diff options
Diffstat (limited to 'i386/pc/i16')
| -rw-r--r-- | i386/pc/i16/i16_a20.c | 144 | ||||
| -rw-r--r-- | i386/pc/i16/i16_a20.h | 32 | ||||
| -rw-r--r-- | i386/pc/i16/i16_bios.h | 98 | ||||
| -rw-r--r-- | i386/pc/i16/i16_exit.c | 37 | ||||
| -rw-r--r-- | i386/pc/i16/i16_ext_mem.c | 151 | ||||
| -rw-r--r-- | i386/pc/i16/i16_init.c | 67 | ||||
| -rw-r--r-- | i386/pc/i16/i16_main.c | 38 | ||||
| -rw-r--r-- | i386/pc/i16/i16_pic.c | 66 | ||||
| -rw-r--r-- | i386/pc/i16/i16_putchar.c | 36 | ||||
| -rw-r--r-- | i386/pc/i16/i16_raw.c | 265 | ||||
| -rw-r--r-- | i386/pc/i16/i16_raw_test_a20.S | 35 | ||||
| -rw-r--r-- | i386/pc/i16/i16_real_int.S | 84 | ||||
| -rw-r--r-- | i386/pc/i16/i16_switch.h | 30 | ||||
| -rw-r--r-- | i386/pc/i16/phys_mem_collect.c | 34 | ||||
| -rw-r--r-- | i386/pc/i16/phys_mem_sources.h | 25 | ||||
| -rw-r--r-- | i386/pc/i16/raw_exit.c | 41 | ||||
| -rw-r--r-- | i386/pc/i16/raw_real_int.c | 46 |
17 files changed, 0 insertions, 1229 deletions
diff --git a/i386/pc/i16/i16_a20.c b/i386/pc/i16/i16_a20.c deleted file mode 100644 index 5e91f86..0000000 --- a/i386/pc/i16/i16_a20.c +++ /dev/null @@ -1,144 +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/pio.h> -#include <mach/machine/code16.h> - -#include "i16_a20.h" - - -/* Keyboard stuff for turning on the A20 address line (gak!). */ -#define K_RDWR 0x60 /* keyboard data & cmds (read/write) */ -#define K_STATUS 0x64 /* keyboard status (read-only) */ -#define K_CMD 0x64 /* keybd ctlr command (write-only) */ - -#define K_OBUF_FUL 0x01 /* output buffer full */ -#define K_IBUF_FUL 0x02 /* input buffer full */ - -#define KC_CMD_WIN 0xd0 /* read output port */ -#define KC_CMD_WOUT 0xd1 /* write output port */ - -#define KB_ENABLE_A20 0xdf /* Linux and my BIOS uses this, - and I trust them more than Mach 3.0, - but I'd like to know what the difference is - and if it matters. */ - /*0x9f*/ /* enable A20, - enable output buffer full interrupt - enable data line - disable clock line */ -#define KB_DISABLE_A20 0xdd - - -CODE16 - - -/* - This routine ensures that the keyboard command queue is empty - (after emptying the output buffers) - - No timeout is used - if this hangs there is something wrong with - the machine, and we probably couldn't proceed anyway. - XXX should at least die properly -*/ -static void i16_empty_8042(void) -{ - int status; - -retry: - i16_nanodelay(1000); - status = i16_inb(K_STATUS); - - if (status & K_OBUF_FUL) - { - i16_nanodelay(1000); - i16_inb(K_RDWR); - goto retry; - } - - if (status & K_IBUF_FUL) - goto retry; -} - -int i16_raw_test_a20(void); - -/* Enable the A20 address line. */ -void i16_raw_enable_a20(void) -{ - int v; - - /* XXX try int 15h function 24h */ - - if (i16_raw_test_a20()) - return; - - /* PS/2 */ - v = i16_inb(0x92); - i16_nanodelay(1000); - i16_outb(0x92,v | 2); - - if (i16_raw_test_a20()) - return; - - /* AT */ - i16_empty_8042(); - i16_outb(K_CMD, KC_CMD_WOUT); - i16_empty_8042(); - i16_outb(K_RDWR, KB_ENABLE_A20); - i16_empty_8042(); - - /* Wait until the a20 line gets enabled. */ - while (!i16_raw_test_a20()); -} - -/* Disable the A20 address line. */ -void i16_raw_disable_a20(void) -{ - int v; - - if (!i16_raw_test_a20()) - return; - - /* PS/2 */ - v = i16_inb(0x92); - i16_nanodelay(1000); - i16_outb(0x92, v & ~2); - - if (!i16_raw_test_a20()) - return; - - /* AT */ - i16_empty_8042(); - i16_outb(K_CMD, KC_CMD_WOUT); - i16_empty_8042(); - i16_outb(K_RDWR, KB_DISABLE_A20); - i16_empty_8042(); - - /* Wait until the a20 line gets disabled. */ - while (i16_raw_test_a20()); -} - - -void (*i16_enable_a20)(void) = i16_raw_enable_a20; -void (*i16_disable_a20)(void) = i16_raw_disable_a20; - diff --git a/i386/pc/i16/i16_a20.h b/i386/pc/i16/i16_a20.h deleted file mode 100644 index afe124b..0000000 --- a/i386/pc/i16/i16_a20.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_PC_A20_H_ -#define _I386_PC_A20_H_ - -/* By default these point to the "raw" routines in pc/a20.c. - They can be revectored to other routines, - e.g. to use a HIMEM driver's facilities. */ -extern void (*i16_enable_a20)(void); -extern void (*i16_disable_a20)(void); - -#endif _I386_PC_A20_H_ diff --git a/i386/pc/i16/i16_bios.h b/i386/pc/i16/i16_bios.h deleted file mode 100644 index 29dc2d8..0000000 --- a/i386/pc/i16/i16_bios.h +++ /dev/null @@ -1,98 +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 _I16_BIOS_H_ -#define _I16_BIOS_H_ - -#include <mach/inline.h> - - -MACH_INLINE void i16_bios_putchar(int c) -{ - asm volatile("int $0x10" : : "a" (0x0e00 | (c & 0xff)), "b" (0x07)); -} - -MACH_INLINE int i16_bios_getchar() -{ - int c; - asm volatile("int $0x16" : "=a" (c) : "a" (0x0000)); - c &= 0xff; - return c; -} - -MACH_INLINE void i16_bios_warm_boot(void) -{ - asm volatile(" - cli - movw $0x40,%ax - movw %ax,%ds - movw $0x1234,0x72 - ljmp $0xffff,$0x0000 - "); -} - -MACH_INLINE void i16_bios_cold_boot(void) -{ - asm volatile(" - cli - movw $0x40,%ax - movw %ax,%ds - movw $0x0000,0x72 - ljmp $0xffff,$0x0000 - "); -} - -MACH_INLINE unsigned char i16_bios_copy_ext_mem( - unsigned src_la, unsigned dest_la, unsigned short word_count) -{ - char buf[48]; - unsigned short i, rc; - - /* Initialize the descriptor structure. */ - for (i = 0; i < sizeof(buf); i++) - buf[i] = 0; - *((unsigned short*)(buf+0x10)) = 0xffff; /* source limit */ - *((unsigned long*)(buf+0x12)) = src_la; /* source linear address */ - *((unsigned char*)(buf+0x15)) = 0x93; /* source access rights */ - *((unsigned short*)(buf+0x18)) = 0xffff; /* dest limit */ - *((unsigned long*)(buf+0x1a)) = dest_la; /* dest linear address */ - *((unsigned char*)(buf+0x1d)) = 0x93; /* dest access rights */ - -#if 0 - i16_puts("buf:"); - for (i = 0; i < sizeof(buf); i++) - i16_writehexb(buf[i]); - i16_puts(""); -#endif - - /* Make the BIOS call to perform the copy. */ - asm volatile(" - int $0x15 - " : "=a" (rc) - : "a" ((unsigned short)0x8700), - "c" (word_count), - "S" ((unsigned short)(unsigned)buf)); - - return rc >> 8; -} - -#endif _I16_BIOS_H_ diff --git a/i386/pc/i16/i16_exit.c b/i386/pc/i16/i16_exit.c deleted file mode 100644 index 674033a..0000000 --- a/i386/pc/i16/i16_exit.c +++ /dev/null @@ -1,37 +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_bios.h" - - -CODE16 - -void i16_exit(int rc) -{ - i16_puts("Press any key to reboot."); - i16_bios_getchar(); - i16_bios_warm_boot(); -} - diff --git a/i386/pc/i16/i16_ext_mem.c b/i386/pc/i16/i16_ext_mem.c deleted file mode 100644 index 08cbecf..0000000 --- a/i386/pc/i16/i16_ext_mem.c +++ /dev/null @@ -1,151 +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/proc_reg.h> - -#include "i16_bios.h" -#include "phys_mem.h" -#include "vm_param.h" -#include "debug.h" - - -static vm_offset_t ext_mem_phys_free_mem; -static vm_size_t ext_mem_phys_free_size; - - -CODE32 - -int ext_mem_collect(void) -{ - if (ext_mem_phys_free_mem) - { - phys_mem_add(ext_mem_phys_free_mem, ext_mem_phys_free_size); - ext_mem_phys_free_mem = 0; - } -} - -CODE16 - -void i16_ext_mem_check() -{ - vm_offset_t ext_mem_top, ext_mem_bot; - unsigned short ext_mem_k; - - /* Find the top of available extended memory. */ - asm volatile(" - int $0x15 - jnc 1f - xorw %%ax,%%ax - 1: - " : "=a" (ext_mem_k) - : "a" (0x8800)); - ext_mem_top = 0x100000 + (vm_offset_t)ext_mem_k * 1024; - - /* XXX check for >16MB memory using function 0xc7 */ - - ext_mem_bot = 0x100000; - - /* Check for extended memory allocated bottom-up: method 1. - This uses the technique (and, loosely, the code) - described in the VCPI spec, version 1.0. */ - if (ext_mem_top > ext_mem_bot) - { - asm volatile(" - pushw %%es - - xorw %%ax,%%ax - movw %%ax,%%es - movw %%es:0x19*4+2,%%ax - movw %%ax,%%es - - movw $0x12,%%di - movw $7,%%cx - rep - cmpsb - jne 1f - - xorl %%edx,%%edx - movb %%es:0x2e,%%dl - shll $16,%%edx - movw %%es:0x2c,%%dx - - 1: - popw %%es - " : "=d" (ext_mem_bot) - : "d" (ext_mem_bot), - "S" ((unsigned short)(vm_offset_t)"VDISK V") - : "eax", "ecx", "esi", "edi"); - } - i16_assert(ext_mem_bot >= 0x100000); - - /* Check for extended memory allocated bottom-up: method 2. - This uses the technique (and, loosely, the code) - described in the VCPI spec, version 1.0. */ - if (ext_mem_top > ext_mem_bot) - { - struct { - char pad1[3]; - char V; - long DISK; - char pad2[30-8]; - unsigned short addr; - } buf; - unsigned char rc; - - i16_assert(sizeof(buf) == 0x20); - rc = i16_bios_copy_ext_mem(0x100000, kvtolin((vm_offset_t)&buf), sizeof(buf)/2); - if ((rc == 0) && (buf.V == 'V') && (buf.DISK == 'DISK')) - { - vm_offset_t new_bot = (vm_offset_t)buf.addr << 10; - i16_assert(new_bot > 0x100000); - if (new_bot > ext_mem_bot) - ext_mem_bot = new_bot; - } - } - i16_assert(ext_mem_bot >= 0x100000); - - if (ext_mem_top > ext_mem_bot) - { - ext_mem_phys_free_mem = ext_mem_bot; - ext_mem_phys_free_size = ext_mem_top - ext_mem_bot; - - /* 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 (ext_mem_top > phys_mem_max) - phys_mem_max = ext_mem_top; - } -} - -void i16_ext_mem_shutdown() -{ - /* We didn't actually allocate the memory, - so no need to deallocate it... */ -} - diff --git a/i386/pc/i16/i16_init.c b/i386/pc/i16/i16_init.c deleted file mode 100644 index 23a51df..0000000 --- a/i386/pc/i16/i16_init.c +++ /dev/null @@ -1,67 +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/proc_reg.h> - -#include "vm_param.h" - - -/* Code segment we originally had when we started in real mode. */ -unsigned short real_cs; - -/* Virtual address of physical memory. */ -vm_offset_t phys_mem_va; - -/* Physical address of start of boot image. */ -vm_offset_t boot_image_pa; - -/* Upper limit of known physical memory. */ -vm_offset_t phys_mem_max; - - -CODE16 - -#include "i16_bios.h" - -/* Called by i16_crt0 (or the equivalent) - to set up our basic 16-bit runtime environment - before calling i16_main(). */ -void i16_init(void) -{ - /* Find our code/data/everything segment. */ - real_cs = get_cs(); - - /* Find out where in physical memory we got loaded. */ - boot_image_pa = real_cs << 4; - - /* Find out where the bottom of physical memory is. - (We won't be able to directly use it for 32-bit accesses - until we actually get into 32-bit mode.) */ - phys_mem_va = -boot_image_pa; - - /* The base of linear memory is at the same place, - at least until we turn paging on. */ - linear_base_va = phys_mem_va; -} - diff --git a/i386/pc/i16/i16_main.c b/i386/pc/i16/i16_main.c deleted file mode 100644 index 328cceb..0000000 --- a/i386/pc/i16/i16_main.c +++ /dev/null @@ -1,38 +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> - - -CODE16 - -void i16_main(void) -{ - i16_init(); - - /* Grab all the memory we can find. */ - i16_ext_mem_check(); - - i16_raw_start(); -} - diff --git a/i386/pc/i16/i16_pic.c b/i386/pc/i16/i16_pic.c deleted file mode 100644 index 3ff2697..0000000 --- a/i386/pc/i16/i16_pic.c +++ /dev/null @@ -1,66 +0,0 @@ -/* - * Copyright (c) 1995 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/pio.h> - -#include "pic.h" -#include "i16.h" - -CODE16 - -/* Program the PICs to use a different set of interrupt vectors. - Assumes processor I flag is off. */ -void i16_pic_set_master(int base) -{ - unsigned char old_mask; - - /* Save the original interrupt mask. */ - old_mask = inb(MASTER_OCW); PIC_DELAY(); - - /* Initialize the master PIC. */ - outb(MASTER_ICW, PICM_ICW1); PIC_DELAY(); - outb(MASTER_OCW, base); PIC_DELAY(); - outb(MASTER_OCW, PICM_ICW3); PIC_DELAY(); - outb(MASTER_OCW, PICM_ICW4); PIC_DELAY(); - - /* Restore the original interrupt mask. */ - outb(MASTER_OCW, old_mask); PIC_DELAY(); -} - -void i16_pic_set_slave(int base) -{ - unsigned char old_mask; - - /* Save the original interrupt mask. */ - old_mask = inb(SLAVES_OCW); PIC_DELAY(); - - /* Initialize the slave PIC. */ - outb(SLAVES_ICW, PICS_ICW1); PIC_DELAY(); - outb(SLAVES_OCW, base); PIC_DELAY(); - outb(SLAVES_OCW, PICS_ICW3); PIC_DELAY(); - outb(SLAVES_OCW, PICS_ICW4); PIC_DELAY(); - - /* Restore the original interrupt mask. */ - outb(SLAVES_OCW, old_mask); PIC_DELAY(); -} - diff --git a/i386/pc/i16/i16_putchar.c b/i386/pc/i16/i16_putchar.c deleted file mode 100644 index 365f4f8..0000000 --- a/i386/pc/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_bios.h" - -CODE16 - -void i16_putchar(int ch) -{ - if (ch == '\n') - i16_bios_putchar('\r'); - i16_bios_putchar(ch); -} - diff --git a/i386/pc/i16/i16_raw.c b/i386/pc/i16/i16_raw.c deleted file mode 100644 index 1f705d3..0000000 --- a/i386/pc/i16/i16_raw.c +++ /dev/null @@ -1,265 +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 - */ -/* - This file rovides a default implementation - of real/pmode switching code. - Assumes that, as far as it's concerned, - low linear address always map to physical addresses. - (The low linear mappings can be changed, - but must be changed back before switching back to real mode.) - - Provides: - i16_raw_switch_to_pmode() - i16_raw_switch_to_real_mode() - - i16_raw_start() - Called in real mode. - Initializes the pmode switching system, - switches to pmode for the first time, - and calls the 32-bit function raw_start(). - - Depends on: - - paging.h: - raw_paging_enable() - raw_paging_disable() - raw_paging_init() - - a20.h: - i16_enable_a20() - i16_disable_a20() - - real.h: - real_cs -*/ - -#include <mach/boolean.h> -#include <mach/machine/code16.h> -#include <mach/machine/vm_param.h> -#include <mach/machine/proc_reg.h> -#include <mach/machine/pio.h> -#include <mach/machine/seg.h> -#include <mach/machine/eflags.h> -#include <mach/machine/pmode.h> - -#include "config.h" -#include "cpu.h" -#include "i16.h" -#include "vm_param.h" -#include "pic.h" -#include "debug.h" -#include "i16_a20.h" -#include "i16_switch.h" - -int irq_master_base, irq_slave_base; - -/* Set to true when everything is initialized properly. */ -static boolean_t inited; - -/* Saved value of eflags register for real mode. */ -static unsigned real_eflags; - - - -#ifdef ENABLE_PAGING -#define RAW_PAGING_ENABLE() raw_paging_enable() -#define RAW_PAGING_DISABLE() raw_paging_disable() -#define RAW_PAGING_INIT() raw_paging_init() -#else -#define RAW_PAGING_ENABLE() ((void)0) -#define RAW_PAGING_DISABLE() ((void)0) -#define RAW_PAGING_INIT() ((void)0) -#endif - - -CODE16 - -void i16_raw_switch_to_pmode() -{ - /* No interrupts from now on please. */ - i16_cli(); - - /* Save the eflags register for switching back later. */ - real_eflags = get_eflags(); - - /* Enable the A20 address line. */ - i16_enable_a20(); - - /* Load the GDT. - Note that we have to do this each time we enter pmode, - not just the first, - because other real-mode programs may have switched to pmode - and back again in the meantime, trashing the GDT pointer. */ - { - struct pseudo_descriptor pdesc; - - pdesc.limit = sizeof(cpu[0].tables.gdt)-1; - pdesc.linear_base = boot_image_pa - + (vm_offset_t)&cpu[0].tables.gdt; - i16_set_gdt(&pdesc); - } - - /* Switch into protected mode. */ - i16_enter_pmode(KERNEL_16_CS); - - /* Reload all the segment registers from the new GDT. */ - set_ds(KERNEL_DS); - set_es(KERNEL_DS); - set_fs(0); - set_gs(0); - set_ss(KERNEL_DS); - - i16_do_32bit( - - if (inited) - { - /* Turn paging on if necessary. */ - RAW_PAGING_ENABLE(); - - /* Load the CPU tables into the processor. */ - cpu_tables_load(&cpu[0]); - - /* Program the PIC so the interrupt vectors won't - conflict with the processor exception vectors. */ - pic_init(PICM_VECTBASE, PICS_VECTBASE); - } - - /* Make sure our flags register is appropriate. */ - set_eflags((get_eflags() - & ~(EFL_IF | EFL_DF | EFL_NT)) - | EFL_IOPL_USER); - ); -} - -void i16_raw_switch_to_real_mode() -{ - /* Make sure interrupts are disabled. */ - cli(); - - /* Avoid sending DOS bogus coprocessor exceptions. - XXX should we save/restore all of CR0? */ - i16_clts(); - - i16_do_32bit( - /* Turn paging off if necessary. */ - RAW_PAGING_DISABLE(); - - /* Reprogram the PIC back to the settings DOS expects. */ - pic_init(0x08, 0x70); - ); - - /* Make sure all the segment registers are 16-bit. - The code segment definitely is already, - because we're running 16-bit code. */ - set_ds(KERNEL_16_DS); - set_es(KERNEL_16_DS); - set_fs(KERNEL_16_DS); - set_gs(KERNEL_16_DS); - set_ss(KERNEL_16_DS); - - /* Switch back to real mode. */ - i16_leave_pmode(real_cs); - - /* Load the real-mode segment registers. */ - set_ds(real_cs); - set_es(real_cs); - set_fs(real_cs); - set_gs(real_cs); - set_ss(real_cs); - - /* Load the real-mode IDT. */ - { - struct pseudo_descriptor pdesc; - - pdesc.limit = 0xffff; - pdesc.linear_base = 0; - i16_set_idt(&pdesc); - } - - /* Disable the A20 address line. */ - i16_disable_a20(); - - /* Restore the eflags register to its original real-mode state. - Note that this will leave interrupts disabled - since it was saved after the cli() above. */ - set_eflags(real_eflags); -} - -void i16_raw_start() -{ - /* Make sure we're not already in protected mode. */ - if (i16_get_msw() & CR0_PE) - i16_die("The processor is in an unknown " - "protected mode environment."); - - do_debug(i16_puts("Real mode detected")); - - /* Minimally initialize the GDT. */ - i16_gdt_init_temp(); - - /* Switch to protected mode for the first time. - This won't load all the processor tables and everything yet, - since they're not fully initialized. */ - i16_raw_switch_to_pmode(); - - /* We can now hop in and out of 32-bit mode at will. */ - i16_do_32bit( - - /* Now that we can access all physical memory, - collect the memory regions we discovered while in 16-bit mode - and add them to our free memory list. - We can't do this before now because the free list nodes - are stored in the free memory itself, - which is probably out of reach of our 16-bit segments. */ - phys_mem_collect(); - - /* Initialize paging if necessary. - Do it before initializing the other processor tables - because they might have to be located - somewhere in high linear memory. */ - RAW_PAGING_INIT(); - - /* Initialize the processor tables. */ - cpu_init(&cpu[0]); - - /* Initialize the hardware interrupt vectors in the IDT. */ - irq_master_base = PICM_VECTBASE; - irq_slave_base = PICS_VECTBASE; - idt_irq_init(); - - inited = TRUE; - - /* Switch to real mode and back again once more, - to make sure everything's loaded properly. */ - do_16bit( - i16_raw_switch_to_real_mode(); - i16_raw_switch_to_pmode(); - ); - - raw_start(); - ); -} - -void (*i16_switch_to_real_mode)() = i16_raw_switch_to_real_mode; -void (*i16_switch_to_pmode)() = i16_raw_switch_to_pmode; - diff --git a/i386/pc/i16/i16_raw_test_a20.S b/i386/pc/i16/i16_raw_test_a20.S deleted file mode 100644 index a934e12..0000000 --- a/i386/pc/i16/i16_raw_test_a20.S +++ /dev/null @@ -1,35 +0,0 @@ - -#include <mach/machine/asm.h> - - .text - .code16 - -/* - * Test the A20 address line; return true if it is enabled. - */ -ENTRY(i16_raw_test_a20) - xorw %ax,%ax - movw %ax,%fs - notw %ax - movw %ax,%gs - - /* See if the values in already in the corresponding locations - are the same. */ - movw %fs:0,%ax - cmpw %gs:16,%ax - jnz 1f - - /* Yes; try changing one and see if they're still the same. */ - movw %ax,%dx - notw %ax - movw %ax,%fs:0 - cmpw %gs:16,%ax - movw %dx,%fs:0 - jnz 1f - - xorl %eax,%eax - ret -1: - movl $1,%eax - ret - diff --git a/i386/pc/i16/i16_real_int.S b/i386/pc/i16/i16_real_int.S deleted file mode 100644 index f05077e..0000000 --- a/i386/pc/i16/i16_real_int.S +++ /dev/null @@ -1,84 +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 "pc_asm.h" - - .text - .code16 - -ENTRY(i16_real_int) - pushf - pushl %ebx - pushl %esi - pushl %edi - pushl %ebp - - cli - - movl 6*4(%esp),%eax - movb %al,1f+1 - - movl 7*4(%esp),%ebp - movl RCD_EAX(%ebp),%eax - movl RCD_EBX(%ebp),%ebx - movl RCD_ECX(%ebp),%ecx - movl RCD_EDX(%ebp),%edx - movl RCD_ESI(%ebp),%esi - movl RCD_EDI(%ebp),%edi - movw RCD_DS(%ebp),%ds - movw RCD_ES(%ebp),%es - /* XXX flags */ - movl RCD_EBP(%ebp),%ebp - -1: int $0 - - pushl %ebp - movl 8*4(%esp),%ebp - popl RCD_EBP(%ebp) - - movl %eax,RCD_EAX(%ebp) - movl %ebx,RCD_EBX(%ebp) - movl %ecx,RCD_ECX(%ebp) - movl %edx,RCD_EDX(%ebp) - movl %esi,RCD_ESI(%ebp) - movl %edi,RCD_EDI(%ebp) - movw %ds,RCD_DS(%ebp) - movw %es,RCD_ES(%ebp) - - pushf - popl %eax - movw %ax,RCD_FLAGS(%ebp) - - movw %ss,%ax - movw %ax,%ds - movw %ax,%es - - popl %ebp - popl %edi - popl %esi - popl %ebx - popf - ret - diff --git a/i386/pc/i16/i16_switch.h b/i386/pc/i16/i16_switch.h deleted file mode 100644 index b7ecf18..0000000 --- a/i386/pc/i16/i16_switch.h +++ /dev/null @@ -1,30 +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_PC_SWITCH_H_ -#define _I386_PC_SWITCH_H_ - -/* Vectors to routines to switch between real and protected mode. */ -extern void (*i16_switch_to_real_mode)(); -extern void (*i16_switch_to_pmode)(); - -#endif _I386_PC_SWITCH_H_ diff --git a/i386/pc/i16/phys_mem_collect.c b/i386/pc/i16/phys_mem_collect.c deleted file mode 100644 index bcb0c09..0000000 --- a/i386/pc/i16/phys_mem_collect.c +++ /dev/null @@ -1,34 +0,0 @@ -/* - * Copyright (c) 1995 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/vm_param.h> - -#include "phys_mem.h" - -void phys_mem_collect(void) -{ -#define pms(name) name##_collect(); -#include "phys_mem_sources.h" -#undef pms -} - diff --git a/i386/pc/i16/phys_mem_sources.h b/i386/pc/i16/phys_mem_sources.h deleted file mode 100644 index 788910d..0000000 --- a/i386/pc/i16/phys_mem_sources.h +++ /dev/null @@ -1,25 +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(ext_mem) - diff --git a/i386/pc/i16/raw_exit.c b/i386/pc/i16/raw_exit.c deleted file mode 100644 index 5ccb69a..0000000 --- a/i386/pc/i16/raw_exit.c +++ /dev/null @@ -1,41 +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/seg.h> -#include <mach/machine/proc_reg.h> - -#include "i16.h" -#include "debug.h" - - -void raw_exit(int rc) -{ - do_16bit( - i16_raw_switch_to_real_mode(); - i16_exit(rc); - while (1); - ); -} - -void (*real_exit)(int rc) = raw_exit; - diff --git a/i386/pc/i16/raw_real_int.c b/i386/pc/i16/raw_real_int.c deleted file mode 100644 index a76d8ca..0000000 --- a/i386/pc/i16/raw_real_int.c +++ /dev/null @@ -1,46 +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/seg.h> -#include <mach/machine/proc_reg.h> - -#include "real.h" -#include "i16.h" -#include "debug.h" - - -void raw_real_int(int intnum, struct real_call_data *rcd) -{ - assert((get_cs() & 3) == 0); - - do_16bit( - unsigned int eflags; - - i16_raw_switch_to_real_mode(); - i16_real_int(intnum, rcd); - i16_raw_switch_to_pmode(); - ); -} - -void (*real_int)(int intnum, struct real_call_data *rcd) = raw_real_int; - |