3 * See file CREDITS for list of people who contributed to this
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22 #include <ppc_asm.tmpl>
26 #define TLB_VALID 0x00000200
28 /* Supported page sizes */
30 #define SZ_1K 0x00000000
31 #define SZ_4K 0x00000010
32 #define SZ_16K 0x00000020
33 #define SZ_64K 0x00000030
34 #define SZ_256K 0x00000040
35 #define SZ_1M 0x00000050
36 #define SZ_16M 0x00000070
37 #define SZ_256M 0x00000090
39 /* Storage attributes */
40 #define SA_W 0x00000800 /* Write-through */
41 #define SA_I 0x00000400 /* Caching inhibited */
42 #define SA_M 0x00000200 /* Memory coherence */
43 #define SA_G 0x00000100 /* Guarded */
44 #define SA_E 0x00000080 /* Endian */
47 #define AC_X 0x00000024 /* Execute */
48 #define AC_W 0x00000012 /* Write */
49 #define AC_R 0x00000009 /* Read */
51 /* Some handy macros */
53 #define EPN(e) ((e) & 0xfffffc00)
54 #define TLB0(epn,sz) ( (EPN((epn)) | (sz) | TLB_VALID ) )
55 #define TLB1(rpn,erpn) ( ((rpn)&0xfffffc00) | (erpn) )
56 #define TLB2(a) ( (a)&0x00000fbf )
68 #define tlbentry(epn,sz,rpn,erpn,attr)\
69 .long TLB0(epn,sz),TLB1(rpn,erpn),TLB2(attr)
72 /**************************************************************************
75 * This table is used by the cpu boot code to setup the initial tlb
76 * entries. Rather than make broad assumptions in the cpu source tree,
77 * this table lets each board set things up however they like.
79 * Pointer to the table is returned in r1
81 *************************************************************************/
89 #if (CFG_LARGE_FLASH == 0xffc00000) /* if booting from large flash */
91 tlbentry( 0xffc00000, SZ_1M, 0xffc00000, 1, AC_R|AC_W|AC_X|SA_G|SA_I|SA_W )
92 tlbentry( 0xffd00000, SZ_1M, 0xffd00000, 1, AC_R|AC_W|AC_X|SA_G|SA_I|SA_W )
93 tlbentry( 0xffe00000, SZ_1M, 0xffe00000, 1, AC_R|AC_W|AC_X|SA_G|SA_I|SA_W )
94 tlbentry( 0xfff00000, SZ_1M, 0xfff00000, 1, AC_R|AC_W|AC_X|SA_G|SA_I|SA_W )
96 tlbentry( 0xff800000, SZ_1M, 0xff800000, 1, AC_R|AC_W|AC_X|SA_G/*|SA_I*/ )
97 tlbentry( 0xff900000, SZ_1M, 0xff900000, 1, AC_R|AC_W|AC_X|SA_G|SA_I|SA_W )
98 #else /* else booting from small flash */
99 tlbentry( 0xffe00000, SZ_1M, 0xffe00000, 1, AC_R|AC_W|AC_X|SA_G/*|SA_I*/ )
100 tlbentry( 0xfff00000, SZ_1M, 0xfff00000, 1, AC_R|AC_W|AC_X|SA_G/*|SA_I*/ )
102 tlbentry( 0xff800000, SZ_1M, 0xff800000, 1, AC_R|AC_W|AC_X|SA_G/*|SA_I*/ )
103 tlbentry( 0xff900000, SZ_1M, 0xff900000, 1, AC_R|AC_W|AC_X|SA_G/*|SA_I*/ )
104 tlbentry( 0xffa00000, SZ_1M, 0xffa00000, 1, AC_R|AC_W|AC_X|SA_G/*|SA_I*/ )
105 tlbentry( 0xffb00000, SZ_1M, 0xffb00000, 1, AC_R|AC_W|AC_X|SA_G/*|SA_I*/ )
108 tlbentry( CFG_EPLD_BASE, SZ_256K, 0xff000000, 1, AC_R|AC_W|SA_G|SA_I )
110 #if (CFG_SRAM_BASE != 0) /* if SRAM up high and SDRAM at zero */
111 tlbentry( 0x00000000, SZ_256M, 0x00000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
112 tlbentry( 0x10000000, SZ_256M, 0x10000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
113 #elif (CFG_SMALL_FLASH == 0xff900000) /* else SRAM at 0 */
114 tlbentry( 0x00000000, SZ_1M, 0xff800000, 1, AC_R|AC_W|AC_X|SA_G/*|SA_I*/ )
115 #elif (CFG_SMALL_FLASH == 0xfff00000)
116 tlbentry( 0x00000000, SZ_1M, 0xffe00000, 1, AC_R|AC_W|AC_X|SA_G/*|SA_I*/ )
118 #error DONT KNOW SRAM LOCATION
121 /* internal ram (l2 cache) */
122 tlbentry( CFG_ISRAM_BASE, SZ_256K, 0x80000000, 0, AC_R|AC_W|AC_X|SA_I )
124 /* peripherals at f0000000 */
125 tlbentry( CFG_PERIPHERAL_BASE, SZ_4K, CFG_PERIPHERAL_BASE, 1, AC_R|AC_W|SA_G|SA_I )
128 #if (CONFIG_COMMANDS & CFG_CMD_PCI)
129 tlbentry( CFG_PCI_BASE, SZ_256M, 0x00000000, 9, AC_R|AC_W|SA_G|SA_I )
130 tlbentry( CFG_PCI_MEMBASE, SZ_256M, 0x10000000, 9, AC_R|AC_W|SA_G|SA_I )