From 540273b23af1ba660daac4ebe1a7651b4b4fea35 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Sun, 14 Jan 2024 21:55:24 +0100
Subject: [PATCH] And reverted io.c, since the stuff was Pentium-only anyway,
 so pointless.

---
 src/io.c | 66 --------------------------------------------------------
 1 file changed, 66 deletions(-)

diff --git a/src/io.c b/src/io.c
index 6e4f190e58..0e68049c36 100644
--- a/src/io.c
+++ b/src/io.c
@@ -279,60 +279,6 @@ io_handler_interleaved(int set, uint16_t base, int size,
     io_handler_common(set, base, size, inb, inw, inl, outb, outw, outl, priv, 2);
 }
 
-extern int trap;
-/* Set trap for I/O address breakpoints. */
-void
-io_debug_check_addr(uint16_t addr)
-{
-    int i = 0;
-    int set_trap = 0;
-
-    /* Do nothing on 486+. */
-    if (is486)
-        return;
-
-    if (!(dr[7] & 0xFF))
-        return;
-    
-    if (!(cr4 & 0x8))
-        return; /* No I/O debug trap. */
-
-    for (i = 0; i < 4; i++) {
-        uint16_t dr_addr = dr[i] & 0xFFFF;
-        int breakpoint_enabled = !!(dr[7] & (0x3 << (2 * i)));
-        int len_type_pair = ((dr[7] >> 16) & (0xF << (4 * i))) >> (4 * i);
-        if (!breakpoint_enabled)
-            continue;
-        if ((len_type_pair & 3) != 2)
-            continue;
-        
-        switch ((len_type_pair >> 2) & 3)
-        {
-            case 0x00:
-                if (dr_addr == addr) {
-                    set_trap = 1;
-                    dr[6] |= (1 << i);
-                }
-                break;
-            case 0x01:
-                if ((dr_addr & ~1) == addr || ((dr_addr & ~1) + 1) == (addr + 1)) {
-                    set_trap = 1;
-                    dr[6] |= (1 << i);
-                }
-                break;
-            case 0x03:
-                dr_addr &= ~3;
-                if (addr >= dr_addr && addr < (dr_addr + 4)) {
-                    set_trap = 1;
-                    dr[6] |= (1 << i);
-                }
-                break;
-        }
-    }
-    if (set_trap)
-        trap |= 4;
-}
-
 uint8_t
 inb(uint16_t port)
 {
@@ -344,8 +290,6 @@ inb(uint16_t port)
     int     qfound = 0;
 #endif
 
-    io_debug_check_addr(port);
-
     if ((pci_flags & FLAG_CONFIG_IO_ON) && (port >= pci_base) && (port < (pci_base + pci_size))) {
         ret = pci_read(port, NULL);
         found = 1;
@@ -406,8 +350,6 @@ outb(uint16_t port, uint8_t val)
     int   qfound = 0;
 #endif
 
-    io_debug_check_addr(port);
-
     if ((pci_flags & FLAG_CONFIG_IO_ON) && (port >= pci_base) && (port < (pci_base + pci_size))) {
         pci_write(port, val, NULL);
         found = 1;
@@ -460,8 +402,6 @@ inw(uint16_t port)
 #endif
     uint8_t  ret8[2];
 
-    io_debug_check_addr(port);
-
     if ((pci_flags & FLAG_CONFIG_IO_ON) && (port >= pci_base) && (port < (pci_base + pci_size))) {
         ret = pci_readw(port, NULL);
         found = 2;
@@ -534,8 +474,6 @@ outw(uint16_t port, uint16_t val)
     int   qfound = 0;
 #endif
 
-    io_debug_check_addr(port);
-
     if ((pci_flags & FLAG_CONFIG_IO_ON) && (port >= pci_base) && (port < (pci_base + pci_size))) {
         pci_writew(port, val, NULL);
         found = 2;
@@ -604,8 +542,6 @@ inl(uint16_t port)
     int      qfound = 0;
 #endif
 
-    io_debug_check_addr(port);
-
     if ((pci_flags & FLAG_CONFIG_IO_ON) && (port >= pci_base) && (port < (pci_base + pci_size))) {
         ret = pci_readl(port, NULL);
         found = 4;
@@ -710,8 +646,6 @@ outl(uint16_t port, uint32_t val)
 #endif
     int   i      = 0;
 
-    io_debug_check_addr(port);
-
     if ((pci_flags & FLAG_CONFIG_IO_ON) && (port >= pci_base) && (port < (pci_base + pci_size))) {
         pci_writel(port, val, NULL);
         found = 4;