--- np2/i386c/ia32/paging.c 2004/01/23 16:17:51 1.5 +++ np2/i386c/ia32/paging.c 2004/02/03 14:27:07 1.8 @@ -1,4 +1,4 @@ -/* $Id: paging.c,v 1.5 2004/01/23 16:17:51 monaka Exp $ */ +/* $Id: paging.c,v 1.8 2004/02/03 14:27:07 monaka Exp $ */ /* * Copyright (c) 2003 NONAKA Kimihiro @@ -112,7 +112,7 @@ * +-----+-----------+-----+-----+---+ */ #if !defined(USE_PAGE_ACCESS_TABLE) -static const DWORD page_access = 0xd0cdd0ff; +#define page_access 0xd0ddd0ff #else /* USE_PAGE_ACCESS_TABLE */ static const BYTE page_access_bit[32] = { 1, /* CR0: n, CPL: s, PTE: s, PTE: r, ope: r */ @@ -143,7 +143,7 @@ static const BYTE page_access_bit[32] = 1, /* CR0: p, CPL: s, PTE: u, PTE: r, ope: r */ 0, /* CR0: p, CPL: s, PTE: u, PTE: r, ope: w */ 1, /* CR0: p, CPL: s, PTE: u, PTE: w, ope: r */ - 0, /* CR0: p, CPL: s, PTE: u, PTE: w, ope: w */ + 1, /* CR0: p, CPL: s, PTE: u, PTE: w, ope: w */ 0, /* CR0: p, CPL: u, PTE: s, PTE: r, ope: r */ 0, /* CR0: p, CPL: u, PTE: s, PTE: r, ope: w */ @@ -239,14 +239,16 @@ cpu_linear_memory_read(DWORD laddr, DWOR break; } - if (length == r) + length -= r; + if (length == 0) break; laddr += r; - length -= r; remain -= r; - if (remain <= 0) + if (remain <= 0) { + /* next page */ remain += 0x1000; + } } return value; @@ -285,7 +287,7 @@ cpu_linear_memory_write(DWORD laddr, DWO case 3: cpu_memorywrite_w(paddr, value & 0xffff); value >>= 16; - cpu_memorywrite(paddr, value & 0xff); + cpu_memorywrite(paddr + 2, value & 0xff); value >>= 8; break; @@ -298,14 +300,16 @@ cpu_linear_memory_write(DWORD laddr, DWO break; } - if (length == r) + length -= r; + if (length == 0) break; laddr += r; - length -= r; remain -= r; - if (remain <= 0) + if (remain <= 0) { + /* next page */ remain += 0x1000; + } } } @@ -327,14 +331,17 @@ paging_check(DWORD laddr, DWORD length, paddr = paging(laddr, crw, pl); r = (remain > length) ? length : remain; - if (length == r) + + length -= r; + if (length == 0) break; laddr += r; - length -= r; remain -= r; - if (remain <= 0) + if (remain <= 0) { + /* next page */ remain += 0x1000; + } } } @@ -347,7 +354,7 @@ paging(DWORD laddr, int crw, int user_mo DWORD pte_addr; /* page table entry address */ DWORD pte; /* page table entry */ DWORD bit; - DWORD err = 0; + DWORD err; #if defined(IA32_SUPPORT_TLB) if (tlb_lookup(laddr, crw, &paddr)) @@ -368,6 +375,7 @@ 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)); @@ -380,7 +388,9 @@ paging(DWORD laddr, int crw, int user_mo /* make physical address */ paddr = (pde & CPU_PDE_4M_BASEADDR_MASK) | (laddr & 0x003fffff); - } else { + } else +#endif /* CPU_FAMILY >= 5 */ + { /* 4KB page size */ pte_addr = (pde & CPU_PDE_BASEADDR_MASK) | ((laddr >> 10) & 0xffc); pte = cpu_memoryread_d(pte_addr);