| /* |
| * (C) Copyright 2008 |
| * 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 <asm-ppc/mmu.h> |
| #include <config.h> |
| |
| /* |
| * 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 |
| |
| /* vxWorks needs this as first entry for the Machine Check interrupt */ |
| tlbentry( 0x40000000, SZ_256M, 0, 0, AC_R|AC_W|AC_X|SA_G|SA_I ) |
| |
| /* |
| * The RAM-boot version skips the SDRAM TLB (identified by EPN=0). This |
| * entry is already configured for SDRAM via the JTAG debugger and mustn't |
| * be re-initialized by this RAM-booting U-Boot version. |
| */ |
| #ifndef CONFIG_SYS_RAMBOOT |
| /* TLB-entry for DDR SDRAM (Up to 2GB) */ |
| #ifdef CONFIG_4xx_DCACHE |
| tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G) |
| #else |
| tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I ) |
| #endif |
| #endif /* CONFIG_SYS_RAMBOOT */ |
| |
| /* TLB-entry for EBC */ |
| tlbentry( CONFIG_SYS_BCSR_BASE, SZ_256M, CONFIG_SYS_BCSR_BASE, 1, AC_R|AC_W|AC_X|SA_G|SA_I ) |
| |
| /* BOOT_CS (FLASH) must be forth. Before relocation SA_I can be off to use the |
| * speed up boot process. It is patched after relocation to enable SA_I |
| */ |
| #ifndef CONFIG_NAND_SPL |
| tlbentry( CONFIG_SYS_BOOT_BASE_ADDR, SZ_256M, CONFIG_SYS_BOOT_BASE_ADDR, 1, AC_R|AC_W|AC_X|SA_G ) |
| #else |
| tlbentry( CONFIG_SYS_NAND_BOOT_SPL_SRC, SZ_4K, CONFIG_SYS_NAND_BOOT_SPL_SRC, 1, AC_R|AC_W|AC_X|SA_G ) |
| #endif |
| |
| #ifdef CONFIG_SYS_INIT_RAM_DCACHE |
| /* TLB-entry for init-ram in dcache (SA_I must be turned off!) */ |
| tlbentry( CONFIG_SYS_INIT_RAM_ADDR, SZ_64K, CONFIG_SYS_INIT_RAM_ADDR, 0, AC_R|AC_W|AC_X|SA_G ) |
| #endif |
| |
| /* TLB-entry for PCI Memory */ |
| tlbentry( CONFIG_SYS_PCI_MEMBASE, SZ_256M, CONFIG_SYS_PCI_MEMBASE, 1, AC_R|AC_W|SA_G|SA_I ) |
| tlbentry( CONFIG_SYS_PCI_MEMBASE1, SZ_256M, CONFIG_SYS_PCI_MEMBASE1, 1, AC_R|AC_W|SA_G|SA_I ) |
| tlbentry( CONFIG_SYS_PCI_MEMBASE2, SZ_256M, CONFIG_SYS_PCI_MEMBASE2, 1, AC_R|AC_W|SA_G|SA_I ) |
| tlbentry( CONFIG_SYS_PCI_MEMBASE3, SZ_256M, CONFIG_SYS_PCI_MEMBASE3, 1, AC_R|AC_W|SA_G|SA_I ) |
| |
| /* TLB-entry for NAND */ |
| tlbentry( CONFIG_SYS_NAND_ADDR, SZ_1K, CONFIG_SYS_NAND_ADDR, 1, AC_R|AC_W|AC_X|SA_G|SA_I ) |
| |
| /* TLB-entry for Internal Registers & OCM */ |
| tlbentry( 0xe0000000, SZ_16M, 0xe0000000, 0, AC_R|AC_W|AC_X|SA_I ) |
| |
| /*TLB-entry PCI registers*/ |
| tlbentry( 0xEEC00000, SZ_1K, 0xEEC00000, 1, AC_R|AC_W|AC_X|SA_G|SA_I ) |
| |
| /* TLB-entry for peripherals */ |
| tlbentry( 0xEF000000, SZ_16M, 0xEF000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I) |
| |
| /* TLB-entry PCI IO Space - from sr@denx.de */ |
| tlbentry(0xE8000000, SZ_64K, 0xE8000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I) |
| |
| tlbtab_end |
| |
| #if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL) |
| /* |
| * For NAND booting the first TLB has to be reconfigured to full size |
| * and with caching disabled after running from RAM! |
| */ |
| #define TLB00 TLB0(CONFIG_SYS_BOOT_BASE_ADDR, SZ_256M) |
| #define TLB01 TLB1(CONFIG_SYS_BOOT_BASE_ADDR, 1) |
| #define TLB02 TLB2(AC_R|AC_W|AC_X|SA_G|SA_I) |
| |
| .globl reconfig_tlb0 |
| reconfig_tlb0: |
| sync |
| isync |
| addi r4,r0,CONFIG_SYS_TLB_FOR_BOOT_FLASH /* TLB entry # */ |
| lis r5,TLB00@h |
| ori r5,r5,TLB00@l |
| tlbwe r5,r4,0x0000 /* Save it out */ |
| lis r5,TLB01@h |
| ori r5,r5,TLB01@l |
| tlbwe r5,r4,0x0001 /* Save it out */ |
| lis r5,TLB02@h |
| ori r5,r5,TLB02@l |
| tlbwe r5,r4,0x0002 /* Save it out */ |
| sync |
| isync |
| blr |
| #endif |
