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- /*
- * (C) Copyright 2006
- * Stefan Roese, DENX Software Engineering, sr@denx.de.
- *
- * 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_8M 0x00000060
- #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
- /*
- * BOOT_CS (FLASH) must be first. Before relocation SA_I can be off to use the
- * speed up boot process. It is patched after relocation to enable SA_I
- */
- tlbentry( CFG_BOOT_BASE_ADDR, SZ_256M, CFG_BOOT_BASE_ADDR, 0, AC_R|AC_W|AC_X|SA_G/*|SA_I*/)
- /* TLB-entry for init-ram in dcache (SA_I must be turned off!) */
- tlbentry( CFG_INIT_RAM_ADDR, SZ_64K, CFG_INIT_RAM_ADDR, 0, AC_R|AC_W|AC_X|SA_G )
- tlbentry( CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
- tlbentry( CFG_PCI_BASE, SZ_256M, CFG_PCI_BASE, 0, AC_R|AC_W|SA_G|SA_I )
- /* PCI */
- tlbentry( CFG_PCI_MEMBASE, SZ_256M, CFG_PCI_MEMBASE, 0, AC_R|AC_W|SA_G|SA_I )
- tlbentry( CFG_PCI_MEMBASE1, SZ_256M, CFG_PCI_MEMBASE1, 0, AC_R|AC_W|SA_G|SA_I )
- tlbentry( CFG_PCI_MEMBASE2, SZ_256M, CFG_PCI_MEMBASE2, 0, AC_R|AC_W|SA_G|SA_I )
- tlbentry( CFG_PCI_MEMBASE3, SZ_256M, CFG_PCI_MEMBASE3, 0, AC_R|AC_W|SA_G|SA_I )
- /* USB 2.0 Device */
- tlbentry( CFG_USB_DEVICE, SZ_1K, 0x50000000, 0, AC_R|AC_W|SA_G|SA_I )
- tlbtab_end
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