3 * Stefan Roese, DENX Software Engineering, sr@denx.de.
5 * Copyright (C) 2002 Scott McNutt <smcnutt@artesyncp.com>
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <ppc_asm.tmpl>
30 #define TLB_VALID 0x00000200
32 /* Supported page sizes */
34 #define SZ_1K 0x00000000
35 #define SZ_4K 0x00000010
36 #define SZ_16K 0x00000020
37 #define SZ_64K 0x00000030
38 #define SZ_256K 0x00000040
39 #define SZ_1M 0x00000050
40 #define SZ_16M 0x00000070
41 #define SZ_256M 0x00000090
43 /* Storage attributes */
44 #define SA_W 0x00000800 /* Write-through */
45 #define SA_I 0x00000400 /* Caching inhibited */
46 #define SA_M 0x00000200 /* Memory coherence */
47 #define SA_G 0x00000100 /* Guarded */
48 #define SA_E 0x00000080 /* Endian */
51 #define AC_X 0x00000024 /* Execute */
52 #define AC_W 0x00000012 /* Write */
53 #define AC_R 0x00000009 /* Read */
55 /* Some handy macros */
57 #define EPN(e) ((e) & 0xfffffc00)
58 #define TLB0(epn,sz) ( (EPN((epn)) | (sz) | TLB_VALID ) )
59 #define TLB1(rpn,erpn) ( ((rpn)&0xfffffc00) | (erpn) )
60 #define TLB2(a) ( (a)&0x00000fbf )
72 #define tlbentry(epn,sz,rpn,erpn,attr)\
73 .long TLB0(epn,sz),TLB1(rpn,erpn),TLB2(attr)
76 /**************************************************************************
79 * This table is used by the cpu boot code to setup the initial tlb
80 * entries. Rather than make broad assumptions in the cpu source tree,
81 * this table lets each board set things up however they like.
83 * Pointer to the table is returned in r1
85 *************************************************************************/
92 tlbentry( 0xf0000000, SZ_256M, 0xf0000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I)
93 tlbentry( CFG_PERIPHERAL_BASE, SZ_256M, 0x40000000, 1, AC_R|AC_W|SA_G|SA_I)
94 tlbentry( CFG_ISRAM_BASE, SZ_4K, 0x80000000, 0, AC_R|AC_W|AC_X )
95 tlbentry( CFG_ISRAM_BASE + 0x1000, SZ_4K, 0x80001000, 0, AC_R|AC_W|AC_X )
96 tlbentry( CFG_SDRAM_BASE, SZ_256M, 0x00000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
97 tlbentry( CFG_PCI_BASE, SZ_256M, 0x00000000, 2, AC_R|AC_W|SA_G|SA_I )
98 tlbentry( CFG_PCI_MEMBASE, SZ_256M, 0x00000000, 3, AC_R|AC_W|SA_G|SA_I )