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/*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm-offsets.h>
#include <ppc_asm.tmpl>
#include <asm/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
/*
* 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
*/
#ifndef CONFIG_NAND_SPL
tlbentry( CONFIG_SYS_BOOT_BASE_ADDR, SZ_256M, CONFIG_SYS_BOOT_BASE_ADDR, 1, AC_RWX | SA_G )
#else
tlbentry( CONFIG_SYS_NAND_BOOT_SPL_SRC, SZ_4K, CONFIG_SYS_NAND_BOOT_SPL_SRC, 1, AC_RWX | SA_G )
#endif
/* TLB entries for DDR2 SDRAM are generated dynamically */
#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_RWX | SA_G )
#endif
/* TLB-entry for PCI Memory */
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-entries for EBC */
/* PMC440 maps EBC to 0xef000000 which is handled by the peripheral
* tlb entry.
* This dummy entry is only for convinience in order not to modify the
* amount of entries. Currently OS/9 relies on this :-)
*/
tlbentry( 0xc0000000, SZ_256M, 0xc0000000, 1, AC_RWX | SA_IG )
/* TLB-entry for NAND */
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_RWX | SA_I )
/*TLB-entry PCI registers*/
tlbentry( 0xEEC00000, SZ_1K, 0xEEC00000, 1, AC_RWX | SA_IG )
/* TLB-entry for peripherals */
tlbentry( 0xEF000000, SZ_16M, 0xEF000000, 1, AC_RWX | SA_IG)
/* TLB-entry PCI IO space */
tlbentry(0xE8000000, SZ_64K, 0xE8000000, 1, AC_RWX | SA_IG)
/* TODO: what about high IO space */
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_RWX | SA_IG)
.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
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