--- np2/i386c/ia32/paging.c	2004/02/03 14:49:39	1.9
+++ np2/i386c/ia32/paging.c	2008/03/22 04:03:07	1.30
@@ -1,7 +1,7 @@
-/*	$Id: paging.c,v 1.9 2004/02/03 14:49:39 monaka Exp $	*/
+/*	$Id: paging.c,v 1.30 2008/03/22 04:03:07 monaka Exp $	*/
 
 /*
- * Copyright (c) 2003 NONAKA Kimihiro
+ * Copyright (c) 2003-2004 NONAKA Kimihiro
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -12,8 +12,6 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
@@ -114,7 +112,7 @@
 #if !defined(USE_PAGE_ACCESS_TABLE)
 #define	page_access	0xd0ddd0ff
 #else	/* USE_PAGE_ACCESS_TABLE */
-static const BYTE page_access_bit[32] = {
+static const UINT8 page_access_bit[32] = {
 	1,	/* CR0: n, CPL: s, PTE: s, PTE: r, ope: r */
 	1,	/* CR0: n, CPL: s, PTE: s, PTE: r, ope: w */
 	1,	/* CR0: n, CPL: s, PTE: s, PTE: w, ope: r */
@@ -184,183 +182,477 @@ static const BYTE page_access_bit[32] = 
  * +- CR3(物理アドレス)
  */
 
-static DWORD paging(DWORD laddr, int crw, int user_mode);
+static UINT32 MEMCALL paging(const UINT32 laddr, const int ucrw);
 #if defined(IA32_SUPPORT_TLB)
-static BOOL tlb_lookup(DWORD vaddr, int crw, DWORD* paddr);
-static void tlb_update(DWORD paddr, DWORD entry, int crw);
+static void MEMCALL tlb_update(const UINT32 laddr, const UINT entry, const int ucrw);
 #endif
 
+#define	PAGE_SIZE	0x1000
+#define	PAGE_MASK	(PAGE_SIZE - 1)
 
-DWORD MEMCALL
-cpu_linear_memory_read(DWORD laddr, DWORD length, int code)
+UINT8 MEMCALL
+cpu_memory_access_la_RMW_b(UINT32 laddr, UINT32 (*func)(UINT32, void *), void *arg)
 {
-	DWORD paddr;
-	DWORD remain;	/* page remain */
-	DWORD r;
-	DWORD shift = 0;
-	DWORD value = 0;
-	int crw;
-	int pl;
-
-	crw = CPU_PAGING_PAGE_READ;
-	crw |= code ? CPU_PAGING_PAGE_CODE : CPU_PAGING_PAGE_DATA;
-	pl = (CPU_STAT_CPL == 3);
+	const int ucrw = CPU_PAGE_WRITE_DATA|CPU_STAT_USER_MODE;
+	UINT32 result, value;
+	UINT32 paddr;
+
+	paddr = paging(laddr, ucrw);
+	value = cpu_memoryread(paddr);
+	result = (*func)(value, arg);
+	cpu_memorywrite(paddr, (UINT8)result);
 
-	/* XXX: 4MB pages... */
-	remain = 0x1000 - (laddr & 0x00000fff);
-	for (;;) {
-		paddr = paging(laddr, crw, pl);
+	return value;
+}
 
-		r = (remain > length) ? length : remain;
-		switch (r) {
-		case 4:
-			value = cpu_memoryread_d(paddr);
-			break;
+UINT16 MEMCALL
+cpu_memory_access_la_RMW_w(UINT32 laddr, UINT32 (*func)(UINT32, void *), void *arg)
+{
+	const int ucrw = CPU_PAGE_WRITE_DATA|CPU_STAT_USER_MODE;
+	UINT32 result, value;
+	UINT32 paddr[2];
+
+	paddr[0] = paging(laddr, ucrw);
+	if ((laddr + 1) & PAGE_MASK) {
+		value = cpu_memoryread_w(paddr[0]);
+		result = (*func)(value, arg);
+		cpu_memorywrite_w(paddr[0], (UINT16)result);
+	} else {
+		paddr[1] = paging(laddr + 1, ucrw);
+		value = cpu_memoryread_b(paddr[0]);
+		value += (UINT16)cpu_memoryread_b(paddr[1]) << 8;
+		result = (*func)(value, arg);
+		cpu_memorywrite(paddr[0], (UINT8)result);
+		cpu_memorywrite(paddr[1], (UINT8)(result >> 8));
+	}
+	return value;
+}
 
+UINT32 MEMCALL
+cpu_memory_access_la_RMW_d(UINT32 laddr, UINT32 (*func)(UINT32, void *), void *arg)
+{
+	const int ucrw = CPU_PAGE_WRITE_DATA|CPU_STAT_USER_MODE;
+	UINT32 result, value;
+	UINT32 paddr[2];
+	UINT remain;
+
+	paddr[0] = paging(laddr, ucrw);
+	remain = PAGE_SIZE - (laddr & PAGE_MASK);
+	if (remain >= 4) {
+		value = cpu_memoryread_d(paddr[0]);
+		result = (*func)(value, arg);
+		cpu_memorywrite_d(paddr[0], result);
+	} else {
+		paddr[1] = paging(laddr + remain, ucrw);
+		switch (remain) {
 		case 3:
-			value |= (DWORD)cpu_memoryread(paddr) << shift;
-			shift += 8;
-			paddr++;
-			/*FALLTHROUGH*/
+			value = cpu_memoryread(paddr[0]);
+			value += (UINT32)cpu_memoryread_w(paddr[0] + 1) << 8;
+			value += (UINT32)cpu_memoryread(paddr[1]) << 24;
+			result = (*func)(value, arg);
+			cpu_memorywrite(paddr[0], (UINT8)result);
+			cpu_memorywrite_w(paddr[0] + 1, (UINT16)(result >> 8));
+			cpu_memorywrite(paddr[1], (UINT8)(result >> 24));
+			break;
+
 		case 2:
-			value |= (DWORD)cpu_memoryread_w(paddr) << shift;
-			shift += 16;
+			value = cpu_memoryread_w(paddr[0]);
+			value += (UINT32)cpu_memoryread_w(paddr[1]) << 16;
+			result = (*func)(value, arg);
+			cpu_memorywrite_w(paddr[0], (UINT16)result);
+			cpu_memorywrite_w(paddr[1], (UINT16)(result >> 16));
 			break;
 
 		case 1:
-			value |= (DWORD)cpu_memoryread(paddr) << shift;
-			shift += 8;
+			value = cpu_memoryread(paddr[0]);
+			value += (UINT32)cpu_memoryread_w(paddr[1]) << 8;
+			value += (UINT32)cpu_memoryread(paddr[1] + 2) << 24;
+			result = (*func)(value, arg);
+			cpu_memorywrite(paddr[0], (UINT8)result);
+			cpu_memorywrite_w(paddr[1], (UINT16)(result >> 8));
+			cpu_memorywrite(paddr[1] + 2, (UINT8)(result >> 24));
 			break;
 
 		default:
-			ia32_panic("cpu_linear_memory_read(): out of range (r = %d)\n", r);
-			break;
+			ia32_panic("cpu_memory_access_la_RMW_d(): out of range (remain = %d)\n", remain);
+			return (UINT32)-1;
 		}
+	}
+	return value;
+}
 
-		length -= r;
-		if (length == 0)
+UINT8 MEMCALL
+cpu_linear_memory_read_b(UINT32 laddr, const int ucrw)
+{
+	UINT32 paddr;
+
+	paddr = paging(laddr, ucrw);
+	return cpu_memoryread(paddr);
+}
+
+UINT16 MEMCALL
+cpu_linear_memory_read_w(UINT32 laddr, const int ucrw)
+{
+	UINT32 paddr[2];
+	UINT16 value;
+
+	paddr[0] = paging(laddr, ucrw);
+	if ((laddr + 1) & PAGE_MASK) {
+		return cpu_memoryread_w(paddr[0]);
+	} else {
+		paddr[1] = paging(laddr + 1, ucrw);
+		value = cpu_memoryread_b(paddr[0]);
+		value += (UINT16)cpu_memoryread_b(paddr[1]) << 8;
+		return value;
+	}
+}
+
+UINT32 MEMCALL
+cpu_linear_memory_read_d(UINT32 laddr, const int ucrw)
+{
+	UINT32 paddr[2];
+	UINT32 value;
+	UINT remain;
+
+	paddr[0] = paging(laddr, ucrw);
+	remain = PAGE_SIZE - (laddr & PAGE_MASK);
+	if (remain >= 4) {
+		return cpu_memoryread_d(paddr[0]);
+	} else {
+		paddr[1] = paging(laddr + remain, ucrw);
+		switch (remain) {
+		case 3:
+			value = cpu_memoryread(paddr[0]);
+			value += (UINT32)cpu_memoryread_w(paddr[0] + 1) << 8;
+			value += (UINT32)cpu_memoryread(paddr[1]) << 24;
 			break;
 
-		laddr += r;
-		remain -= r;
-		if (remain <= 0) {
-			/* next page */
-			remain += 0x1000;
+		case 2:
+			value = cpu_memoryread_w(paddr[0]);
+			value += (UINT32)cpu_memoryread_w(paddr[1]) << 16;
+			break;
+
+		case 1:
+			value = cpu_memoryread(paddr[0]);
+			value += (UINT32)cpu_memoryread_w(paddr[1]) << 8;
+			value += (UINT32)cpu_memoryread(paddr[1] + 2) << 24;
+			break;
+
+		default:
+			ia32_panic("cpu_linear_memory_read_d(): out of range (remain = %d)\n", remain);
+			value = (UINT32)-1;
+			break;
 		}
+		return value;
 	}
-
-	return value;
 }
 
-void MEMCALL
-cpu_linear_memory_write(DWORD laddr, DWORD value, DWORD length)
+UINT64 MEMCALL
+cpu_linear_memory_read_q(UINT32 laddr, const int ucrw)
 {
-	DWORD paddr;
-	DWORD remain;	/* page remain */
-	DWORD r;
-	int crw;
-	int pl;
-
-	crw = CPU_PAGING_PAGE_WRITE;
-	crw |= CPU_PAGING_PAGE_DATA;
-	pl = (CPU_STAT_CPL == 3);
+	UINT32 paddr[2];
+	UINT64 value;
+	UINT remain;
 
-	/* XXX: 4MB pages... */
-	remain = 0x1000 - (laddr & 0x00000fff);
-	for (;;) {
-		paddr = paging(laddr, crw, pl);
+	paddr[0] = paging(laddr, ucrw);
+	remain = PAGE_SIZE - (laddr & PAGE_MASK);
+	if (remain >= 8) {
+		return cpu_memoryread_q(paddr[0]);
+	} else {
+		paddr[1] = paging(laddr + remain, ucrw);
+		switch (remain) {
+		case 7:
+			value = cpu_memoryread(paddr[0]);
+			value += (UINT64)cpu_memoryread_w(paddr[0] + 1) << 8;
+			value += (UINT64)cpu_memoryread_d(paddr[0] + 3) << 24;
+			value += (UINT64)cpu_memoryread(paddr[1]) << 56;
+			break;
+
+		case 6:
+			value = cpu_memoryread_w(paddr[0]);
+			value += (UINT64)cpu_memoryread_d(paddr[0] + 2) << 16;
+			value += (UINT64)cpu_memoryread_w(paddr[1]) << 48;
+			break;
+
+		case 5:
+			value = cpu_memoryread(paddr[0]);
+			value += (UINT64)cpu_memoryread_d(paddr[0] + 1) << 8;
+			value += (UINT64)cpu_memoryread_w(paddr[1]) << 40;
+			value += (UINT64)cpu_memoryread(paddr[1] + 2) << 56;
+			break;
 
-		r = (remain > length) ? length : remain;
-		switch (r) {
 		case 4:
-			cpu_memorywrite_d(paddr, value);
+			value = cpu_memoryread_d(paddr[0]);
+			value += (UINT64)cpu_memoryread_d(paddr[1]) << 32;
 			break;
 
 		case 3:
-			cpu_memorywrite(paddr, value & 0xff);
-			value >>= 8;
-			paddr++;
-			/*FALLTHROUGH*/
+			value = cpu_memoryread(paddr[0]);
+			value += (UINT64)cpu_memoryread_w(paddr[0] + 1) << 8;
+			value += (UINT64)cpu_memoryread_d(paddr[1]) << 24;
+			value += (UINT64)cpu_memoryread(paddr[1] + 4) << 56;
+			break;
+
 		case 2:
-			cpu_memorywrite_w(paddr, value & 0xffff);
-			value >>= 16;
+			value = cpu_memoryread_w(paddr[0]);
+			value += (UINT64)cpu_memoryread_d(paddr[1]) << 16;
+			value += (UINT64)cpu_memoryread_w(paddr[1] + 4) << 48;
 			break;
 
 		case 1:
-			cpu_memorywrite(paddr, value & 0xff);
-			value >>= 8;
+			value = cpu_memoryread(paddr[0]);
+			value += (UINT64)cpu_memoryread_d(paddr[1]) << 8;
+			value += (UINT64)cpu_memoryread_w(paddr[1] + 4) << 40;
+			value += (UINT64)cpu_memoryread(paddr[1] + 6) << 56;
 			break;
 
 		default:
-			ia32_panic("cpu_linear_memory_write(): out of range (r = %d)\n", r);
+			ia32_panic("cpu_linear_memory_read_q(): out of range (remain = %d)\n", remain);
+			value = (UINT64)-1;
 			break;
 		}
+	}
+	return value;
+}
 
-		length -= r;
-		if (length == 0)
+REG80 MEMCALL
+cpu_linear_memory_read_f(UINT32 laddr, const int ucrw)
+{
+	UINT32 paddr[2];
+	REG80 value;
+	UINT remain;
+	UINT i, j;
+
+	paddr[0] = paging(laddr, ucrw);
+	remain = PAGE_SIZE - (laddr & PAGE_MASK);
+	if (remain >= 10) {
+		return cpu_memoryread_f(paddr[0]);
+	} else {
+		paddr[1] = paging(laddr + remain, ucrw);
+		for (i = 0; i < remain; ++i) {
+			value.b[i] = cpu_memoryread(paddr[0] + i);
+		}
+		for (j = 0; i < 10; ++i, ++j) {
+			value.b[i] = cpu_memoryread(paddr[1] + j);
+		}
+		return value;
+	}
+}
+
+void MEMCALL
+cpu_linear_memory_write_b(UINT32 laddr, UINT8 value, const int user_mode)
+{
+	const int ucrw = CPU_PAGE_WRITE_DATA|user_mode;
+	UINT32 paddr;
+
+	paddr = paging(laddr, ucrw);
+	cpu_memorywrite(paddr, value);
+}
+
+void MEMCALL
+cpu_linear_memory_write_w(UINT32 laddr, UINT16 value, const int user_mode)
+{
+	const int ucrw = CPU_PAGE_WRITE_DATA|user_mode;
+	UINT32 paddr[2];
+
+	paddr[0] = paging(laddr, ucrw);
+	if ((laddr + 1) & PAGE_MASK) {
+		cpu_memorywrite_w(paddr[0], value);
+	} else {
+		paddr[1] = paging(laddr + 1, ucrw);
+		cpu_memorywrite(paddr[0], (UINT8)value);
+		cpu_memorywrite(paddr[1], (UINT8)(value >> 8));
+	}
+}
+
+void MEMCALL
+cpu_linear_memory_write_d(UINT32 laddr, UINT32 value, const int user_mode)
+{
+	const int ucrw = CPU_PAGE_WRITE_DATA|user_mode;
+	UINT32 paddr[2];
+	UINT remain;
+
+	paddr[0] = paging(laddr, ucrw);
+	remain = PAGE_SIZE - (laddr & PAGE_MASK);
+	if (remain >= 4) {
+		cpu_memorywrite_d(paddr[0], value);
+	} else {
+		paddr[1] = paging(laddr + remain, ucrw);
+		switch (remain) {
+		case 3:
+			cpu_memorywrite(paddr[0], (UINT8)value);
+			cpu_memorywrite_w(paddr[0] + 1, (UINT16)(value >> 8));
+			cpu_memorywrite(paddr[1], (UINT8)(value >> 24));
 			break;
 
-		laddr += r;
-		remain -= r;
-		if (remain <= 0) {
-			/* next page */
-			remain += 0x1000;
+		case 2:
+			cpu_memorywrite_w(paddr[0], (UINT16)value);
+			cpu_memorywrite_w(paddr[1], (UINT16)(value >> 16));
+			break;
+
+		case 1:
+			cpu_memorywrite(paddr[0], (UINT8)value);
+			cpu_memorywrite_w(paddr[1], (UINT16)(value >> 8));
+			cpu_memorywrite(paddr[1] + 2, (UINT8)(value >> 24));
+			break;
 		}
 	}
 }
 
 void MEMCALL
-paging_check(DWORD laddr, DWORD length, int rw)
+cpu_linear_memory_write_q(UINT32 laddr, UINT64 value, const int user_mode)
 {
-	DWORD paddr;
-	DWORD remain;	/* page remain */
-	DWORD r;
-	int crw;
-	int pl;
+	const int ucrw = CPU_PAGE_WRITE_DATA|user_mode;
+	UINT32 paddr[2];
+	UINT remain;
+
+	paddr[0] = paging(laddr, ucrw);
+	remain = PAGE_SIZE - (laddr & PAGE_MASK);
+	if (remain >= 8) {
+		cpu_memorywrite_q(paddr[0], value);
+	} else {
+		paddr[1] = paging(laddr + remain, ucrw);
+		switch (remain) {
+		case 7:
+			cpu_memorywrite(paddr[0], (UINT8)value);
+			cpu_memorywrite_w(paddr[0] + 1, (UINT16)(value >> 8));
+			cpu_memorywrite_d(paddr[0] + 3, (UINT32)(value >> 24));
+			cpu_memorywrite(paddr[1], (UINT8)(value >> 56));
+			break;
+
+		case 6:
+			cpu_memorywrite_w(paddr[0], (UINT16)value);
+			cpu_memorywrite_d(paddr[0] + 2, (UINT32)(value >> 16));
+			cpu_memorywrite_w(paddr[1], (UINT16)(value >> 48));
+			break;
+
+		case 5:
+			cpu_memorywrite(paddr[0], (UINT8)value);
+			cpu_memorywrite_d(paddr[0] + 1, (UINT32)(value >> 8));
+			cpu_memorywrite_w(paddr[1], (UINT16)(value >> 40));
+			cpu_memorywrite(paddr[1] + 2, (UINT8)(value >> 56));
+			break;
+
+		case 4:
+			cpu_memorywrite_d(paddr[0], (UINT32)value);
+			cpu_memorywrite_d(paddr[1], (UINT32)(value >> 32));
+			break;
 
-	crw = rw;
-	pl = (CPU_STAT_CPL == 3);
+		case 3:
+			cpu_memorywrite(paddr[0], (UINT8)value);
+			cpu_memorywrite_w(paddr[0] + 1, (UINT16)(value >> 8));
+			cpu_memorywrite_d(paddr[1], (UINT32)(value >> 24));
+			cpu_memorywrite(paddr[1] + 4, (UINT8)(value >> 56));
+			break;
 
-	/* XXX: 4MB pages... */
-	remain = 0x1000 - (laddr & 0x00000fff);
+		case 2:
+			cpu_memorywrite_w(paddr[0], (UINT16)value);
+			cpu_memorywrite_d(paddr[1], (UINT32)(value >> 16));
+			cpu_memorywrite_w(paddr[1] + 4, (UINT16)(value >> 48));
+			break;
+
+		case 1:
+			cpu_memorywrite(paddr[0], (UINT8)value);
+			cpu_memorywrite_d(paddr[1], (UINT32)(value >> 8));
+			cpu_memorywrite_w(paddr[1] + 4, (UINT16)(value >> 40));
+			cpu_memorywrite(paddr[1] + 6, (UINT8)(value >> 56));
+			break;
+		}
+	}
+}
+
+void MEMCALL
+cpu_linear_memory_write_f(UINT32 laddr, const REG80 *value, const int user_mode)
+{
+	const int ucrw = CPU_PAGE_WRITE_DATA|user_mode;
+	UINT32 paddr[2];
+	UINT remain;
+	UINT i, j;
+
+	paddr[0] = paging(laddr, ucrw);
+	remain = PAGE_SIZE - (laddr & PAGE_MASK);
+	if (remain >= 10) {
+		cpu_memorywrite_f(paddr[0], value);
+	} else {
+		paddr[1] = paging(laddr + remain, ucrw);
+		for (i = 0; i < remain; ++i) {
+			cpu_memorywrite(paddr[0] + i, value->b[i]);
+		}
+		for (j = 0; i < 10; ++i, ++j) {
+			cpu_memorywrite(paddr[1] + j, value->b[i]);
+		}
+	}
+}
+
+
+void MEMCALL
+cpu_memory_access_la_region(UINT32 laddr, UINT length, const int ucrw, UINT8 *data)
+{
+	UINT32 paddr;
+	UINT remain;	/* page remain */
+	UINT r;
+
+	if (length == 0)
+		return;
+
+	remain = PAGE_SIZE - (laddr & PAGE_MASK);
 	for (;;) {
-		paddr = paging(laddr, crw, pl);
+		if (!CPU_STAT_PAGING) {
+			paddr = laddr;
+		} else {
+			paddr = paging(laddr, ucrw);
+		}
 
 		r = (remain > length) ? length : remain;
+		if (!(ucrw & CPU_PAGE_WRITE)) {
+			cpu_memoryread_region(paddr, data, r);
+		} else {
+			cpu_memorywrite_region(paddr, data, r);
+		}
 
 		length -= r;
 		if (length == 0)
 			break;
 
+		data += r;
 		laddr += r;
 		remain -= r;
 		if (remain <= 0) {
 			/* next page */
-			remain += 0x1000;
+			remain += PAGE_SIZE;
 		}
 	}
 }
 
-static DWORD
-paging(DWORD laddr, int crw, int user_mode)
+UINT32 MEMCALL
+laddr2paddr(const UINT32 laddr, const int ucrw)
 {
-	DWORD paddr;	/* physical address */
-	DWORD pde_addr;	/* page directory entry address */
-	DWORD pde;	/* page directory entry */
-	DWORD pte_addr;	/* page table entry address */
-	DWORD pte;	/* page table entry */
-	DWORD bit;
-	DWORD err;
 
+	return paging(laddr, ucrw);
+}
+
+static UINT32 MEMCALL
+paging(const UINT32 laddr, const int ucrw)
+{
+	UINT32 paddr;		/* physical address */
+	UINT32 pde_addr;	/* page directory entry address */
+	UINT32 pde;		/* page directory entry */
+	UINT32 pte_addr;	/* page table entry address */
+	UINT32 pte;		/* page table entry */
+	UINT bit;
+	UINT err;
 #if defined(IA32_SUPPORT_TLB)
-	if (tlb_lookup(laddr, crw, &paddr))
-		return paddr;
-#endif	/* IA32_SUPPORT_TLB */
+	TLB_ENTRY_T *ep;
+
+	ep = tlb_lookup(laddr, ucrw);
+	if (ep != NULL)
+		return ep->paddr + (laddr & PAGE_MASK);
+#endif
 
-	pde_addr = CPU_STAT_PDE_BASE | ((laddr >> 20) & 0xffc);
+	pde_addr = CPU_STAT_PDE_BASE + ((laddr >> 20) & 0xffc);
 	pde = cpu_memoryread_d(pde_addr);
 	if (!(pde & CPU_PDE_PRESENT)) {
-		VERBOSE(("paging: PDE is not present"));
+		VERBOSE(("paging: PTE page is not present"));
 		VERBOSE(("paging: CPU_CR3 = 0x%08x", CPU_CR3));
 		VERBOSE(("paging: laddr = 0x%08x, pde_addr = 0x%08x, pde = 0x%08x", laddr, pde_addr, pde));
 		err = 0;
@@ -371,45 +663,26 @@ paging(DWORD laddr, int crw, int user_mo
 		cpu_memorywrite_d(pde_addr, pde);
 	}
 
-#if CPU_FAMILY >= 5
-	/* no support PAE */
-	__ASSERT(!(CPU_CR4 & CPU_CR4_PAE));
-
-	if ((CPU_CR4 & CPU_CR4_PSE) && (pde & CPU_PDE_PAGE_SIZE)) {
-		/* 4MB page size */
-
-		/* fake PTE bit */
-		pte = pde | CPU_PTE_DIRTY;
-		pte_addr = 0;	/* compiler happy */
-
-		/* make physical address */
-		paddr = (pde & CPU_PDE_4M_BASEADDR_MASK) | (laddr & 0x003fffff);
-	} else
-#endif	/* CPU_FAMILY >= 5 */
-	{
-		/* 4KB page size */
-		pte_addr = (pde & CPU_PDE_BASEADDR_MASK) | ((laddr >> 10) & 0xffc);
-		pte = cpu_memoryread_d(pte_addr);
-		if (!(pte & CPU_PTE_PRESENT)) {
-			VERBOSE(("paging: PTE is not present"));
-			VERBOSE(("paging: laddr = 0x%08x, pde_addr = 0x%08x, pde = 0x%08x", laddr, pde_addr, pde));
-			VERBOSE(("paging: pte_addr = 0x%08x, pte = 0x%08x", pte_addr, pte));
-			err = 0;
-			goto pf_exception;
-		}
-		if (!(pte & CPU_PTE_ACCESS)) {
-			pte |= CPU_PTE_ACCESS;
-			cpu_memorywrite_d(pte_addr, pte);
-		}
-
-		/* make physical address */
-		paddr = (pte & CPU_PTE_BASEADDR_MASK) | (laddr & 0x00000fff);
+	pte_addr = (pde & CPU_PDE_BASEADDR_MASK) + ((laddr >> 10) & 0xffc);
+	pte = cpu_memoryread_d(pte_addr);
+	if (!(pte & CPU_PTE_PRESENT)) {
+		VERBOSE(("paging: page is not present"));
+		VERBOSE(("paging: laddr = 0x%08x, pde_addr = 0x%08x, pde = 0x%08x", laddr, pde_addr, pde));
+		VERBOSE(("paging: pte_addr = 0x%08x, pte = 0x%08x", pte_addr, pte));
+		err = 0;
+		goto pf_exception;
+	}
+	if (!(pte & CPU_PTE_ACCESS)) {
+		pte |= CPU_PTE_ACCESS;
+		cpu_memorywrite_d(pte_addr, pte);
 	}
 
-	bit  = crw & CPU_PAGING_PAGE_WRITE;
+	/* make physical address */
+	paddr = (pte & CPU_PTE_BASEADDR_MASK) + (laddr & PAGE_MASK);
+
+	bit  = ucrw & (CPU_PAGE_WRITE|CPU_PAGE_USER_MODE);
 	bit |= (pde & pte & (CPU_PTE_WRITABLE|CPU_PTE_USER_MODE));
-	bit |= (user_mode << 3);
-	bit |= (CPU_CR0 & CPU_CR0_WP) >> 12;
+	bit |= CPU_STAT_WP;
 
 #if !defined(USE_PAGE_ACCESS_TABLE)
 	if (!(page_access & (1 << bit)))
@@ -425,122 +698,107 @@ paging(DWORD laddr, int crw, int user_mo
 		goto pf_exception;
 	}
 
-	if ((crw & CPU_PAGING_PAGE_WRITE) && !(pte & CPU_PTE_DIRTY)) {
+	if ((ucrw & CPU_PAGE_WRITE) && !(pte & CPU_PTE_DIRTY)) {
 		pte |= CPU_PTE_DIRTY;
 		cpu_memorywrite_d(pte_addr, pte);
 	}
 
 #if defined(IA32_SUPPORT_TLB)
-	tlb_update(paddr, pte, crw);
-#endif	/* IA32_SUPPORT_TLB */
-
+	tlb_update(laddr, pte, (bit & (CPU_PTE_WRITABLE|CPU_PTE_USER_MODE)) + ((ucrw & CPU_PAGE_CODE) >> 1));
+#endif
 	return paddr;
 
 pf_exception:
 	CPU_CR2 = laddr;
-	err |= ((crw & CPU_PAGING_PAGE_WRITE) << 1) | (user_mode << 2);
+	err |= (ucrw & CPU_PAGE_WRITE) << 1;
+	err |= (ucrw & CPU_PAGE_USER_MODE) >> 1;
 	EXCEPTION(PF_EXCEPTION, err);
 	return 0;	/* compiler happy */
 }
 
+
 #if defined(IA32_SUPPORT_TLB)
 /* 
  * TLB
  */
-typedef struct {
-	BYTE	valid;	/* TLB entry is valid */
-	BYTE	global;	/* this TLB entry is global */
-	BYTE	score;
-	BYTE	pad;
+#define	TLB_GET_PADDR(ep, addr)	((ep)->paddr + ((addr) & ~CPU_PTE_BASEADDR_MASK))
+#define	TLB_SET_PADDR(ep, addr)	((ep)->paddr = (addr) & CPU_PTE_BASEADDR_MASK)
 
-	DWORD	tag;
-	DWORD	mask;	/* 4K or 2M or 4M */
+#define	TLB_TAG_SHIFT		TLB_ENTRY_TAG_MAX_SHIFT
+#define	TLB_TAG_MASK		(~((1 << TLB_TAG_SHIFT) - 1))
+#define	TLB_GET_TAG_ADDR(ep)	((ep)->tag & TLB_TAG_MASK)
+#define	TLB_SET_TAG_ADDR(ep, addr) \
+do { \
+	(ep)->tag &= ~TLB_TAG_MASK; \
+	(ep)->tag |= (addr) & TLB_TAG_MASK; \
+} while (/*CONSTCOND(*/ 0)
+
+#define	TLB_IS_VALID(ep)	((ep)->tag & TLB_ENTRY_TAG_VALID)
+#define	TLB_SET_VALID(ep)	((ep)->tag = TLB_ENTRY_TAG_VALID)
+#define	TLB_SET_INVALID(ep)	((ep)->tag = 0)
+
+#define	TLB_IS_WRITABLE(ep)	((ep)->tag & CPU_PTE_WRITABLE)
+#define	TLB_IS_USERMODE(ep)	((ep)->tag & CPU_PTE_USER_MODE)
+#define	TLB_IS_DIRTY(ep)	((ep)->tag & TLB_ENTRY_TAG_DIRTY)
+#if (CPU_FEATURES & CPU_FEATURE_PGE) == CPU_FEATURE_PGE
+#define	TLB_IS_GLOBAL(ep)	((ep)->tag & TLB_ENTRY_TAG_GLOBAL)
+#else
+#define	TLB_IS_GLOBAL(ep)	0
+#endif
 
-	DWORD	paddr;	/* physical addr */
-} TLB_ENTRY_T;
+#define	TLB_SET_TAG_FLAGS(ep, entry, bit) \
+do { \
+	(ep)->tag |= (entry) & (CPU_PTE_GLOBAL_PAGE|CPU_PTE_DIRTY); \
+	(ep)->tag |= (bit) & (CPU_PTE_WRITABLE|CPU_PTE_USER_MODE); \
+} while (/*CONSTCOND*/ 0)
+
+#define	NTLB		2	/* 0: DTLB, 1: ITLB */
+#define	NENTRY		(1 << 6)
+#define	TLB_ENTRY_SHIFT	12
+#define	TLB_ENTRY_MASK	(NENTRY - 1)
 
 typedef struct {
-	BYTE		kind;
-#define	TLB_KIND_INSTRUCTION	(1 << 1)
-#define	TLB_KIND_DATA		(1 << 2)
-#define	TLB_KIND_COMBINE	(TLB_KIND_INSTRUCTION|TLB_KIND_DATA)
-#define	TLB_KIND_SMALL		(1 << 3)
-#define	TLB_KIND_LARGE		(1 << 4)
-#define	TLB_KIND_BOTH		(TLB_KIND_SMALL|TLB_KIND_LARGE)
-
-	BYTE		way;	/* n-way associative */
-	BYTE		idx;	/* number of TLB index */
-	BYTE		bpad;
-
-	WORD		num;	/* number of TLB entry */
-	WORD		wpad;
-
-	TLB_ENTRY_T*	entry;	/* entry[assoc][idx] or entry[assoc] if idx == 1*/
+	TLB_ENTRY_T	entry[NENTRY];
 } TLB_T;
 
-static int ntlb;
-static TLB_T tlb[4];	/* i TLB, i (lp) TLB, d TLB, d (lp) TLB */
+static TLB_T tlb[NTLB];
 
 #if defined(IA32_PROFILE_TLB)
 /* profiling */
-static DWORD tlb_hits;
-static DWORD tlb_misses;
-static DWORD tlb_lookups;
-static DWORD tlb_updates;
-static DWORD tlb_flushes;
-static DWORD tlb_global_flushes;
-static DWORD tlb_entry_flushes;
+typedef struct {
+	UINT64 tlb_hits;
+	UINT64 tlb_misses;
+	UINT64 tlb_lookups;
+	UINT64 tlb_updates;
+	UINT64 tlb_flushes;
+	UINT64 tlb_global_flushes;
+	UINT64 tlb_entry_flushes;
+} TLB_PROFILE_T;
+
+static TLB_PROFILE_T tlb_profile;
 
-#define	PROFILE_INC(v)	(v)++;
+#define	PROFILE_INC(v)	tlb_profile.v++
 #else	/* !IA32_PROFILE_TLB */
 #define	PROFILE_INC(v)
 #endif	/* IA32_PROFILE_TLB */
 
+
 void
-tlb_init()
+tlb_init(void)
 {
-	int i;
 
-	for (i = 0; i < NELEMENTS(tlb); i++) {
-		if (tlb[i].entry) {
-			free(tlb[i].entry);
-		}
-	}
 	memset(tlb, 0, sizeof(tlb));
-
 #if defined(IA32_PROFILE_TLB)
-	tlb_hits = 0;
-	tlb_misses = 0;
-	tlb_lookups = 0;
-	tlb_updates = 0;
-	tlb_flushes = 0;
-	tlb_global_flushes = 0;
-	tlb_entry_flushes = 0;
+	memset(tlb_profile, 0, sizeof(tlb_profile));
 #endif	/* IA32_PROFILE_TLB */
-
-	/* XXX プロセッサ種別にしたがって TLB 構成を構築する */
-
-	/* とりあえず i486 形式で… */
-	/* combine (I/D) TLB: 4KB Pages, 4-way set associative 32 entries */
-	ntlb = 1;
-	tlb[0].kind = TLB_KIND_COMBINE | TLB_KIND_SMALL;
-	tlb[0].num = 32;
-	tlb[0].way = 4;
-	tlb[0].idx = tlb[0].num / tlb[0].way;
-
-	for (i = 0; i < ntlb; i++) {
-		tlb[i].entry = (TLB_ENTRY_T*)calloc(sizeof(TLB_ENTRY_T), tlb[i].num);
-		if (tlb[i].entry == 0) {
-			ia32_panic("tlb_init(): can't alloc TLB entry\n");
-		}
-	}
 }
 
-void
+void MEMCALL
 tlb_flush(BOOL allflush)
 {
-	TLB_ENTRY_T* ep;
-	int i, j;
+	TLB_ENTRY_T *ep;
+	int i;
+	int n;
 
 	if (allflush) {
 		PROFILE_INC(tlb_global_flushes);
@@ -548,169 +806,104 @@ tlb_flush(BOOL allflush)
 		PROFILE_INC(tlb_flushes);
 	}
 
-	for (i = 0; i < ntlb; i++) {
-		ep = tlb[i].entry;
-		for (j = 0; j < tlb[i].num; j++, ep++) {
-			if (ep->valid && (allflush || !ep->global)) {
-				ep->valid = 0;
+	for (n = 0; n < NTLB; n++) {
+		for (i = 0; i < NENTRY ; i++) {
+			ep = &tlb[n].entry[i];
+			if (TLB_IS_VALID(ep) && (allflush || !TLB_IS_GLOBAL(ep))) {
+				TLB_SET_INVALID(ep);
 				PROFILE_INC(tlb_entry_flushes);
 			}
 		}
 	}
 }
 
-void
-tlb_flush_page(DWORD vaddr)
+void MEMCALL
+tlb_flush_page(UINT32 laddr)
 {
-	TLB_ENTRY_T* ep;
+	TLB_ENTRY_T *ep;
 	int idx;
-	int i;
+	int n;
 
-	for (i = 0; i < ntlb; i++) {
-		if (tlb[i].idx == 1) {
-			/* fully set associative */
-			idx = 0;
-		} else {
-			if (tlb[i].kind & TLB_KIND_SMALL) {
-				idx = (vaddr >> 12) & (tlb[i].idx - 1);
-			} else {
-				idx = (vaddr >> 22) & (tlb[i].idx - 1);
-			}
-		}
+	PROFILE_INC(tlb_flushes);
 
-		/* search */
-		ep = &tlb[i].entry[idx * tlb[i].way];
-		for (i = 0; i < tlb[i].way; i++) {
-			if (ep->valid) {
-				if ((vaddr & ep->mask) == ep->tag) {
-					ep->valid = 0;
-					PROFILE_INC(tlb_entry_flushes);
-					break;
-				}
+	idx = (laddr >> TLB_ENTRY_SHIFT) & TLB_ENTRY_MASK;
+
+	for (n = 0; n < NTLB; n++) {
+		ep = &tlb[n].entry[idx];
+		if (TLB_IS_VALID(ep)) {
+			if ((laddr & TLB_TAG_MASK) == TLB_GET_TAG_ADDR(ep)) {
+				TLB_SET_INVALID(ep);
+				PROFILE_INC(tlb_entry_flushes);
 			}
 		}
 	}
 }
 
-static BOOL
-tlb_lookup(DWORD laddr, int crw, DWORD* paddr)
+TLB_ENTRY_T * MEMCALL
+tlb_lookup(const UINT32 laddr, const int ucrw)
 {
-	TLB_ENTRY_T* ep;
+	TLB_ENTRY_T *ep;
+	UINT bit;
 	int idx;
-	int i;
+	int n;
 
 	PROFILE_INC(tlb_lookups);
 
-	crw &= CPU_PAGING_PAGE_CODE | CPU_PAGING_PAGE_DATA;
-	for (i = 0; i < ntlb; i++) {
-		if (tlb[i].kind & crw) {
-			if (tlb[i].idx == 1) {
-				/* fully set associative */
-				idx = 0;
-			} else {
-				if (tlb[i].kind & TLB_KIND_SMALL) {
-					idx = (laddr >> 12) & (tlb[i].idx - 1);
-				} else {
-					idx = (laddr >> 22) & (tlb[i].idx - 1);
-				}
-			}
-
-			/* search */
-			ep = &tlb[i].entry[idx * tlb[i].way];
-			for (i = 0; i < tlb[i].way; i++) {
-				if (ep->valid) {
-					if ((laddr & ep->mask) == ep->tag) {
-						if (ep->score != (BYTE)~0)
-							ep->score++;
-						*paddr = ep->paddr;
-						PROFILE_INC(tlb_hits);
-						return TRUE;
-					}
+	n = (ucrw & CPU_PAGE_CODE) >> 1;
+	idx = (laddr >> TLB_ENTRY_SHIFT) & TLB_ENTRY_MASK;
+	ep = &tlb[n].entry[idx];
+
+	if (TLB_IS_VALID(ep)) {
+		if ((laddr & TLB_TAG_MASK) == TLB_GET_TAG_ADDR(ep)) {
+			bit = ucrw & (CPU_PAGE_WRITE|CPU_PAGE_USER_MODE);
+			bit |= ep->tag & (CPU_PTE_WRITABLE|CPU_PTE_USER_MODE);
+			bit |= CPU_STAT_WP;
+#if !defined(USE_PAGE_ACCESS_TABLE)
+			if ((page_access & (1 << bit)))
+#else
+			if (page_access_bit[bit])
+#endif
+			{
+				if (!(ucrw & CPU_PAGE_WRITE) || TLB_IS_DIRTY(ep)) {
+					PROFILE_INC(tlb_hits);
+					return ep;
 				}
 			}
 		}
 	}
 	PROFILE_INC(tlb_misses);
-	return FALSE;
+	return NULL;
 }
 
-static void
-tlb_update(DWORD paddr, DWORD entry, int crw)
+static void MEMCALL
+tlb_update(const UINT32 laddr, const UINT entry, const int bit)
 {
-	TLB_ENTRY_T* ep;
+	TLB_ENTRY_T *ep;
+	UINT32 pos;
 	int idx;
-	int i, j;
-	int min_way;
-	WORD min_score = ~0;
+	int n;
 
 	PROFILE_INC(tlb_updates);
 
-	crw &= CPU_PAGING_PAGE_CODE | CPU_PAGING_PAGE_DATA;
-	for (i = 0; i < ntlb; i++) {
-		if (tlb[i].kind & crw) {
-			if (tlb[i].idx == 1) {
-				/* fully set associative */
-				idx = 0;
-			} else {
-				/* n-way set associative */
-				if (!(entry & CPU_PDE_PAGE_SIZE)) {
-					if (!(tlb[i].kind & TLB_KIND_SMALL))
-						continue;
-					idx = (entry >> 12) & (tlb[i].idx - 1);
-				} else {
-					if (!(tlb[i].kind & TLB_KIND_LARGE))
-						continue;
-					idx = (entry >> 22) & (tlb[i].idx - 1);
-				}
-			}
-
-			/* search */
-			ep = &tlb[i].entry[idx * tlb[i].way];
-			for (min_way = 0, j = 0; j < tlb[i].way; j++, ep++) {
-				if (ep->valid) {
-					if (min_score >= ep->score) {
-						min_way = j;
-						min_score = ep->score;
-					}
-				} else {
-					min_way = j;
-					min_score = 0;
-					break;
-				}
-			}
-
-			/* replace */
-			ep = &tlb[i].entry[idx * tlb[i].way + min_way];
-			ep->valid = 1;
-			ep->global = (entry & CPU_PTE_GLOBAL_PAGE) ? 1 : 0;
-			ep->score = 0;
-			ep->mask = (entry & CPU_PDE_PAGE_SIZE) ?  CPU_PDE_4M_BASEADDR_MASK : CPU_PTE_BASEADDR_MASK;
-			ep->tag = entry & ep->mask;
-			ep->paddr = paddr;
-			break;
+	n = bit & 1;
+	idx = (laddr >> TLB_ENTRY_SHIFT) & TLB_ENTRY_MASK;
+	ep = &tlb[n].entry[idx];
+
+	TLB_SET_VALID(ep);
+	TLB_SET_TAG_ADDR(ep, laddr);
+	TLB_SET_PADDR(ep, entry);
+	TLB_SET_TAG_FLAGS(ep, entry, bit);
+
+	if (ep->paddr < CPU_MEMREADMAX) {
+		ep->memp = mem + ep->paddr;
+		return;
+	} else if (ep->paddr >= USE_HIMEM) {
+		pos = (ep->paddr & CPU_ADRSMASK) - 0x100000;
+		if (pos < CPU_EXTMEMSIZE) {
+			ep->memp = CPU_EXTMEM + pos;
+			return;
 		}
 	}
-	__ASSERT(i != ntlb);
-}
-#else	/* !IA32_SUPPORT_TLB */
-void
-tlb_init()
-{
-
-	/* nothing to do */
-}
-
-void
-tlb_flush(BOOL allflush)
-{
-
-	(void)allflush;
-}
-
-void
-tlb_flush_page(DWORD laddr)
-{
-
-	(void)laddr;
+	ep->memp = NULL;
 }
 #endif	/* IA32_SUPPORT_TLB */