/*
+ * (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
+ * SPDX-License-Identifier: GPL-2.0+
*/
+#include <asm-offsets.h>
#include <ppc_asm.tmpl>
+#include <asm/mmu.h>
#include <config.h>
-/* General */
-#define TLB_VALID 0x00000200
-#define _256M 0x10000000
-
-/* 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
* 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_RWX | SA_IG )
+
/*
- * 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
+ * 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_NAND_SPL
- tlbentry( CFG_BOOT_BASE_ADDR, SZ_256M, CFG_BOOT_BASE_ADDR, 1, AC_R|AC_W|AC_X|SA_G )
-#else
- tlbentry( CFG_NAND_BOOT_SPL_SRC, SZ_4K, CFG_NAND_BOOT_SPL_SRC, 1, AC_R|AC_W|AC_X|SA_G )
-#endif
-
+#ifndef CONFIG_SYS_RAMBOOT
/* TLB-entry for DDR SDRAM (Up to 2GB) */
#ifdef CONFIG_4xx_DCACHE
- tlbentry( CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G)
+ tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_RWX | SA_G)
#else
- tlbentry( CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
+ tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_RWX | SA_IG )
#endif
+#endif /* CONFIG_SYS_RAMBOOT */
-#ifdef CFG_INIT_RAM_DCACHE
+ /* TLB-entry for EBC */
+ tlbentry( CONFIG_SYS_BCSR_BASE, SZ_256M, CONFIG_SYS_BCSR_BASE, 1, AC_RWX | SA_IG )
+
+ /* 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
+ */
+ tlbentry( CONFIG_SYS_BOOT_BASE_ADDR, SZ_256M, CONFIG_SYS_BOOT_BASE_ADDR, 1, AC_RWX | SA_G )
+
+#ifdef CONFIG_SYS_INIT_RAM_DCACHE
/* 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( CONFIG_SYS_INIT_RAM_ADDR, SZ_64K, CONFIG_SYS_INIT_RAM_ADDR, 0, AC_RWX | SA_G )
#endif
/* TLB-entry for PCI Memory */
- tlbentry( CFG_PCI_MEMBASE, SZ_256M, CFG_PCI_MEMBASE, 1, AC_R|AC_W|SA_G|SA_I )
- tlbentry( CFG_PCI_MEMBASE1, SZ_256M, CFG_PCI_MEMBASE1, 1, AC_R|AC_W|SA_G|SA_I )
- tlbentry( CFG_PCI_MEMBASE2, SZ_256M, CFG_PCI_MEMBASE2, 1, AC_R|AC_W|SA_G|SA_I )
- tlbentry( CFG_PCI_MEMBASE3, SZ_256M, CFG_PCI_MEMBASE3, 1, AC_R|AC_W|SA_G|SA_I )
-
- /* TLB-entry for EBC */
- tlbentry( CFG_BCSR_BASE, SZ_1K, CFG_BCSR_BASE, 1, AC_R|AC_W|AC_X|SA_G|SA_I )
+ tlbentry( CONFIG_SYS_PCI_MEMBASE, SZ_256M, CONFIG_SYS_PCI_MEMBASE, 1, AC_RW | SA_IG )
+ tlbentry( CONFIG_SYS_PCI_MEMBASE1, SZ_256M, CONFIG_SYS_PCI_MEMBASE1, 1, AC_RW | SA_IG )
+ tlbentry( CONFIG_SYS_PCI_MEMBASE2, SZ_256M, CONFIG_SYS_PCI_MEMBASE2, 1, AC_RW | SA_IG )
+ tlbentry( CONFIG_SYS_PCI_MEMBASE3, SZ_256M, CONFIG_SYS_PCI_MEMBASE3, 1, AC_RW | SA_IG )
/* TLB-entry for NAND */
- tlbentry( CFG_NAND_ADDR, SZ_1K, CFG_NAND_ADDR, 1, AC_R|AC_W|AC_X|SA_G|SA_I )
+ tlbentry( CONFIG_SYS_NAND_ADDR, SZ_1K, CONFIG_SYS_NAND_ADDR, 1, AC_RWX | SA_IG )
/* TLB-entry for Internal Registers & OCM */
- tlbentry( 0xe0000000, SZ_16M, 0xe0000000, 0, AC_R|AC_W|AC_X|SA_I )
+ tlbentry( 0xe0000000, SZ_16M, 0xe0000000, 0, AC_RWX | SA_I )
/*TLB-entry PCI registers*/
- tlbentry( 0xEEC00000, SZ_1K, 0xEEC00000, 1, AC_R|AC_W|AC_X|SA_G|SA_I )
+ tlbentry( 0xEEC00000, SZ_1K, 0xEEC00000, 1, AC_RWX | SA_IG )
/* TLB-entry for peripherals */
- tlbentry( 0xEF000000, SZ_16M, 0xEF000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I)
+ tlbentry( 0xEF000000, SZ_16M, 0xEF000000, 1, AC_RWX | SA_IG)
/* 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)
+ tlbentry(0xE8000000, SZ_64K, 0xE8000000, 1, AC_RWX | SA_IG)
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(CFG_BOOT_BASE_ADDR, SZ_256M)
-#define TLB01 TLB1(CFG_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,r0,0x0000 /* TLB entry #0 */
- 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
projects / platform / kernel / u-boot.git / blobdiff