| /* |
| * Copyright (C) 2005 |
| * Travis B. Sawyer, Sandburst Corporation, tsawyer@sandburst.com |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <ppc_asm.tmpl> |
| #include <config.h> |
| |
| /* General */ |
| #define TLB_VALID 0x00000200 |
| |
| /* Supported page sizes */ |
| |
| #define SZ_1K 0x00000000 |
| #define SZ_4K 0x00000010 |
| #define SZ_16K 0x00000020 |
| #define SZ_64K 0x00000030 |
| #define SZ_256K 0x00000040 |
| #define SZ_1M 0x00000050 |
| #define SZ_16M 0x00000070 |
| #define SZ_256M 0x00000090 |
| |
| /* Storage attributes */ |
| #define SA_W 0x00000800 /* Write-through */ |
| #define SA_I 0x00000400 /* Caching inhibited */ |
| #define SA_M 0x00000200 /* Memory coherence */ |
| #define SA_G 0x00000100 /* Guarded */ |
| #define SA_E 0x00000080 /* Endian */ |
| |
| /* Access control */ |
| #define AC_X 0x00000024 /* Execute */ |
| #define AC_W 0x00000012 /* Write */ |
| #define AC_R 0x00000009 /* Read */ |
| |
| /* Some handy macros */ |
| |
| #define EPN(e) ((e) & 0xfffffc00) |
| #define TLB0(epn,sz) ( (EPN((epn)) | (sz) | TLB_VALID ) ) |
| #define TLB1(rpn,erpn) ( ((rpn)&0xfffffc00) | (erpn) ) |
| #define TLB2(a) ( (a)&0x00000fbf ) |
| |
| #define tlbtab_start\ |
| mflr r1 ;\ |
| bl 0f ; |
| |
| #define tlbtab_end\ |
| .long 0, 0, 0 ; \ |
| 0: mflr r0 ; \ |
| mtlr r1 ; \ |
| blr ; |
| |
| #define tlbentry(epn,sz,rpn,erpn,attr)\ |
| .long TLB0(epn,sz),TLB1(rpn,erpn),TLB2(attr) |
| |
| |
| /************************************************************************** |
| * TLB TABLE |
| * |
| * This table is used by the cpu boot code to setup the initial tlb |
| * entries. Rather than make broad assumptions in the cpu source tree, |
| * this table lets each board set things up however they like. |
| * |
| * Pointer to the table is returned in r1 |
| * |
| *************************************************************************/ |
| |
| .section .bootpg,"ax" |
| .globl tlbtab |
| |
| tlbtab: |
| tlbtab_start |
| tlbentry( 0xf0000000, SZ_256M, 0xf0000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I) |
| tlbentry( CFG_PERIPHERAL_BASE, SZ_256M, 0x40000000, 1, AC_R|AC_W|SA_G|SA_I) |
| tlbentry( CFG_ISRAM_BASE, SZ_256K, 0x80000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I) |
| tlbentry( CFG_SDRAM_BASE, SZ_256M, 0x00000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I ) |
| tlbentry( CFG_SDRAM_BASE+0x10000000, SZ_256M, 0x10000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I ) |
| tlbentry( CFG_SDRAM_BASE+0x20000000, SZ_256M, 0x20000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I ) |
| tlbentry( CFG_SDRAM_BASE+0x30000000, SZ_256M, 0x30000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I ) |
| tlbentry( CFG_PCI_BASE, SZ_256M, 0x00000000, 2, AC_R|AC_W|SA_G|SA_I ) |
| tlbentry( CFG_PCI_MEMBASE, SZ_256M, 0x00000000, 3, AC_R|AC_W|SA_G|SA_I ) |
| tlbtab_end |
