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Diffstat (limited to 'i386/i386at/iopl.c')
| -rw-r--r-- | i386/i386at/iopl.c | 290 |
1 files changed, 0 insertions, 290 deletions
diff --git a/i386/i386at/iopl.c b/i386/i386at/iopl.c deleted file mode 100644 index 8080911..0000000 --- a/i386/i386at/iopl.c +++ /dev/null @@ -1,290 +0,0 @@ -/* - * Mach Operating System - * Copyright (c) 1991,1990,1989 Carnegie Mellon University - * All Rights Reserved. - * - * Permission to use, copy, modify and distribute this software and its - * documentation is hereby granted, provided that both the copyright - * notice and this permission notice appear in all copies of the - * software, derivative works or modified versions, and any portions - * thereof, and that both notices appear in supporting documentation. - * - * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" - * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR - * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * Carnegie Mellon requests users of this software to return to - * - * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU - * School of Computer Science - * Carnegie Mellon University - * Pittsburgh PA 15213-3890 - * - * any improvements or extensions that they make and grant Carnegie Mellon - * the rights to redistribute these changes. - */ - -#include <mach/vm_prot.h> -#include <mach/machine/vm_types.h> -#include <mach/machine/vm_param.h> -#include <mach/machine/eflags.h> - -#include <ipc/ipc_port.h> - -#include <device/io_req.h> - -#include <i386/io_port.h> -#include <i386/pit.h> -#include <i386/pio.h> - -/* - * IOPL device. - */ -ipc_port_t iopl_device_port = IP_NULL; -mach_device_t iopl_device = 0; - -/* - * Ports that we allow access to. - */ -io_reg_t iopl_port_list[] = { - /* timer 2 */ - 0x42, - /* speaker output */ - 0x61, - /* ATI - savage */ - 0x1ce, 0x1cf, - /* game port */ - 0x201, - /* sound board */ - 0x220, 0x221, 0x222, 0x223, 0x224, 0x225, 0x226, 0x227, - 0x228, 0x229, 0x22a, 0x22b, 0x22c, 0x22d, 0x22e, 0x22f, - /* printer */ - 0x278, 0x279, 0x27a, - 0x378, 0x379, 0x37a, - /* ega/vga */ - 0x3b0, 0x3b1, 0x3b2, 0x3b3, 0x3b4, 0x3b5, 0x3b6, 0x3b7, - 0x3b8, 0x3b9, 0x3ba, 0x3bb, 0x3bc, 0x3bd, 0x3be, 0x3bf, - 0x3c0, 0x3c1, 0x3c2, 0x3c3, 0x3c4, 0x3c5, 0x3c6, 0x3c7, - 0x3c8, 0x3c9, 0x3ca, 0x3cb, 0x3cc, 0x3cd, 0x3ce, 0x3cf, - 0x3d0, 0x3d1, 0x3d2, 0x3d3, 0x3d4, 0x3d5, 0x3d6, 0x3d7, - 0x3d8, 0x3d9, 0x3da, 0x3db, 0x3dc, 0x3dd, 0x3de, 0x3df, - /* end of list */ - IO_REG_NULL, - /* patch space */ - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0 -}; - -int -ioplopen(dev, flag, ior) - int dev; - int flag; - io_req_t ior; -{ - iopl_device_port = ior->io_device->port; - iopl_device = ior->io_device; - - io_port_create(iopl_device, iopl_port_list); - return (0); -} - - -/*ARGSUSED*/ -int -ioplclose(dev, flags) - int dev; - int flags; -{ - io_port_destroy(iopl_device); - iopl_device_port = IP_NULL; - iopl_device = 0; - return 0; -} - -/*ARGSUSED*/ -int iopl_all = 1; -int -ioplmmap(dev, off, prot) -int dev; -vm_offset_t off; -vm_prot_t prot; -{ - extern vm_offset_t phys_last_addr; - - if (iopl_all) { - if (off == 0) - return 0; - else if (off < 0xa0000) - return -1; - else if (off >= 0x100000 && off <= phys_last_addr) - return -1; - else - return i386_btop(off); - - } - if (off > 0x60000) - return(-1); - - /* Get page frame number for the page to be mapped. */ - - return(i386_btop(0xa0000 + off)); -} - -/* - * For DOS compatibility, it's easier to list the ports we don't - * allow access to. - */ -#define IOPL_PORTS_USED_MAX 256 -io_reg_t iopl_ports_used[IOPL_PORTS_USED_MAX] = { - IO_REG_NULL -}; - -boolean_t -iopl_port_forbidden(io_port) - int io_port; -{ - int i; - -#if 0 /* we only read from these... it should be OK */ - - if (io_port <= 0xff) - return TRUE; /* system ports. 42,61,70,71 allowed above */ - - if (io_port >= 0x130 && io_port <= 0x137) - return TRUE; /* AHA disk */ - - if (io_port >= 0x170 && io_port <= 0x177) - return TRUE; /* HD disk */ - - if (io_port >= 0x1f0 && io_port <= 0x1f7) - return TRUE; /* HD disk */ - - if (io_port >= 0x230 && io_port <= 0x237) - return TRUE; /* AHA disk */ - - if (io_port >= 0x280 && io_port <= 0x2df) - return TRUE; /* 8390 network */ - - if (io_port >= 0x300 && io_port <= 0x31f) - return TRUE; /* 8390 network */ - - if (io_port >= 0x330 && io_port <= 0x337) - return TRUE; /* AHA disk */ - - if (io_port >= 0x370 && io_port <= 0x377) - return TRUE; /* FD disk */ - - if (io_port >= 0x3f0 && io_port <= 0x3f7) - return TRUE; /* FD disk */ - -#endif - - /* - * Must be OK, as far as we know... - * Record the port in the list, for - * curiosity seekers. - */ - for (i = 0; i < IOPL_PORTS_USED_MAX; i++) { - if (iopl_ports_used[i] == io_port) - break; /* in list */ - if (iopl_ports_used[i] == IO_REG_NULL) { - iopl_ports_used[i] = io_port; - iopl_ports_used[i+1] = IO_REG_NULL; - break; - } - } - - return FALSE; -} - -/* - * Emulate certain IO instructions for the AT bus. - * - * We emulate writes to the timer control port, 43. - * Only writes to timer 2 are allowed. - * - * Temporarily, we allow reads of any IO port, - * but ONLY if the thread has the IOPL device mapped - * and is not in V86 mode. - * - * This is a HACK and MUST go away when the DOS emulator - * emulates these IO ports, or when we decide that - * the DOS world can get access to all uncommitted IO - * ports. In that case, config() should remove the IO - * ports for devices it exists from the allowable list. - */ -boolean_t -iopl_emulate(regs, opcode, io_port) - struct i386_saved_state *regs; - int opcode; - int io_port; -{ - iopb_tss_t iopb; - - iopb = current_thread()->pcb->ims.io_tss; - if (iopb == 0) - return FALSE; /* no IO mapped */ - - /* - * Handle outb to the timer control port, - * for timer 2 only. - */ - if (io_port == PITCTL_PORT) { - - int io_byte = regs->eax & 0xff; - - if (((iopb->bitmap[PITCTR2_PORT >> 3] & (1 << (PITCTR2_PORT & 0x7))) - == 0) /* allowed */ - && (opcode == 0xe6 || opcode == 0xee) /* outb */ - && (io_byte & 0xc0) == 0x80) /* timer 2 */ - { - outb(io_port, io_byte); - return TRUE; - } - return FALSE; /* invalid IO to port 42 */ - } - - /* - * If the thread has the IOPL device mapped, and - * the io port is not on the 'forbidden' list, allow - * reads from it. Reject writes. - * - * Don`t do this for V86 mode threads - * (hack for DOS emulator XXX!) - */ - if (!(regs->efl & EFL_VM) && - iopb_check_mapping(current_thread(), iopl_device) && - !iopl_port_forbidden(io_port)) - { - /* - * handle inb, inw, inl - */ - switch (opcode) { - case 0xE4: /* inb imm */ - case 0xEC: /* inb dx */ - regs->eax = (regs->eax & 0xffffff00) - | inb(io_port); - return TRUE; - - case 0x66E5: /* inw imm */ - case 0x66ED: /* inw dx */ - regs->eax = (regs->eax & 0xffff0000) - | inw(io_port); - return TRUE; - - case 0xE5: /* inl imm */ - case 0xED: /* inl dx */ - regs->eax = inl(io_port); - return TRUE; - - default: - return FALSE; /* OUT not allowed */ - } - } - - /* - * Not OK. - */ - return FALSE; -} - |