/*
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* Copyright 2004, 2007-2012 Freescale Semiconductor, Inc.
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* Copyright (C) 2003 Motorola,Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/* U-Boot Startup Code for Motorola 85xx PowerPC based Embedded Boards
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*
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* The processor starts at 0xfffffffc and the code is first executed in the
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* last 4K page(0xfffff000-0xffffffff) in flash/rom.
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*
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*/
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#include <asm-offsets.h>
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#include <config.h>
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#include <mpc85xx.h>
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#include <version.h>
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#include <ppc_asm.tmpl>
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#include <ppc_defs.h>
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#include <asm/cache.h>
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#include <asm/mmu.h>
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#undef MSR_KERNEL
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#define MSR_KERNEL ( MSR_ME ) /* Machine Check */
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#define LAW_EN 0x80000000
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#if defined(CONFIG_NAND_SPL) || \
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(defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_INIT_MINIMAL))
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#define MINIMAL_SPL
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#endif
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#if !defined(CONFIG_SPL) && !defined(CONFIG_SYS_RAMBOOT) && \
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!defined(CONFIG_SECURE_BOOT) && !defined(CONFIG_SRIO_PCIE_BOOT_SLAVE)
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#define NOR_BOOT
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#endif
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/*
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* Set up GOT: Global Offset Table
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*
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* Use r12 to access the GOT
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*/
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START_GOT
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GOT_ENTRY(_GOT2_TABLE_)
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GOT_ENTRY(_FIXUP_TABLE_)
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#ifndef MINIMAL_SPL
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GOT_ENTRY(_start)
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GOT_ENTRY(_start_of_vectors)
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GOT_ENTRY(_end_of_vectors)
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GOT_ENTRY(transfer_to_handler)
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#endif
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GOT_ENTRY(__init_end)
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GOT_ENTRY(__bss_end)
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GOT_ENTRY(__bss_start)
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END_GOT
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/*
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* e500 Startup -- after reset only the last 4KB of the effective
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* address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg
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* section is located at THIS LAST page and basically does three
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* things: clear some registers, set up exception tables and
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* add more TLB entries for 'larger spaces'(e.g. the boot rom) to
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* continue the boot procedure.
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* Once the boot rom is mapped by TLB entries we can proceed
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* with normal startup.
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*
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*/
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.section .bootpg,"ax"
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.globl _start_e500
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_start_e500:
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/* Enable debug exception */
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li r1,MSR_DE
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mtmsr r1
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/*
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* If we got an ePAPR device tree pointer passed in as r3, we need that
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* later in cpu_init_early_f(). Save it to a safe register before we
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* clobber it so that we can fetch it from there later.
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*/
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mr r24, r3
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#ifdef CONFIG_SYS_FSL_ERRATUM_A004510
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mfspr r3,SPRN_SVR
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rlwinm r3,r3,0,0xff
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li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV
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cmpw r3,r4
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beq 1f
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#ifdef CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2
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li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2
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cmpw r3,r4
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beq 1f
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#endif
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/* Not a supported revision affected by erratum */
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li r27,0
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b 2f
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1: li r27,1 /* Remember for later that we have the erratum */
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/* Erratum says set bits 55:60 to 001001 */
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msync
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isync
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mfspr r3,SPRN_HDBCR0
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li r4,0x48
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rlwimi r3,r4,0,0x1f8
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mtspr SPRN_HDBCR0,r3
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isync
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2:
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#endif
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#ifdef CONFIG_SYS_FSL_ERRATUM_A005125
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msync
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isync
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mfspr r3, SPRN_HDBCR0
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oris r3, r3, 0x0080
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mtspr SPRN_HDBCR0, r3
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#endif
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#if defined(CONFIG_SECURE_BOOT) && defined(CONFIG_E500MC) && \
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!defined(CONFIG_E6500)
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/* ISBC uses L2 as stack.
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* Disable L2 cache here so that u-boot can enable it later
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* as part of it's normal flow
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*/
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/* Check if L2 is enabled */
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mfspr r3, SPRN_L2CSR0
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lis r2, L2CSR0_L2E@h
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ori r2, r2, L2CSR0_L2E@l
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and. r4, r3, r2
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beq l2_disabled
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mfspr r3, SPRN_L2CSR0
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/* Flush L2 cache */
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lis r2,(L2CSR0_L2FL)@h
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ori r2, r2, (L2CSR0_L2FL)@l
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or r3, r2, r3
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sync
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isync
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mtspr SPRN_L2CSR0,r3
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isync
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1:
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mfspr r3, SPRN_L2CSR0
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and. r1, r3, r2
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bne 1b
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mfspr r3, SPRN_L2CSR0
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lis r2, L2CSR0_L2E@h
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ori r2, r2, L2CSR0_L2E@l
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andc r4, r3, r2
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sync
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isync
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mtspr SPRN_L2CSR0,r4
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isync
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l2_disabled:
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#endif
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/* clear registers/arrays not reset by hardware */
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/* L1 */
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li r0,2
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mtspr L1CSR0,r0 /* invalidate d-cache */
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mtspr L1CSR1,r0 /* invalidate i-cache */
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mfspr r1,DBSR
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mtspr DBSR,r1 /* Clear all valid bits */
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.macro create_tlb1_entry esel ts tsize epn wimg rpn perm phy_high scratch
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lis \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@l
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mtspr MAS0, \scratch
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lis \scratch, FSL_BOOKE_MAS1(1, 1, 0, \ts, \tsize)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS1(1, 1, 0, \ts, \tsize)@l
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mtspr MAS1, \scratch
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lis \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@l
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mtspr MAS2, \scratch
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lis \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@l
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mtspr MAS3, \scratch
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lis \scratch, \phy_high@h
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ori \scratch, \scratch, \phy_high@l
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mtspr MAS7, \scratch
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isync
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msync
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tlbwe
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isync
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.endm
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.macro create_tlb0_entry esel ts tsize epn wimg rpn perm phy_high scratch
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lis \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@l
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mtspr MAS0, \scratch
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lis \scratch, FSL_BOOKE_MAS1(1, 0, 0, \ts, \tsize)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS1(1, 0, 0, \ts, \tsize)@l
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mtspr MAS1, \scratch
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lis \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@l
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mtspr MAS2, \scratch
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lis \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@l
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mtspr MAS3, \scratch
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lis \scratch, \phy_high@h
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ori \scratch, \scratch, \phy_high@l
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mtspr MAS7, \scratch
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isync
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msync
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tlbwe
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isync
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.endm
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.macro delete_tlb1_entry esel scratch
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lis \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@l
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mtspr MAS0, \scratch
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li \scratch, 0
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mtspr MAS1, \scratch
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isync
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msync
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tlbwe
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isync
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.endm
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.macro delete_tlb0_entry esel epn wimg scratch
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lis \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@l
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mtspr MAS0, \scratch
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li \scratch, 0
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mtspr MAS1, \scratch
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lis \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@h
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ori \scratch, \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@l
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mtspr MAS2, \scratch
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isync
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msync
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tlbwe
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isync
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.endm
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/* Interrupt vectors do not fit in minimal SPL. */
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#if !defined(MINIMAL_SPL)
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/* Setup interrupt vectors */
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lis r1,CONFIG_SYS_MONITOR_BASE@h
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mtspr IVPR,r1
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li r4,CriticalInput@l
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mtspr IVOR0,r4 /* 0: Critical input */
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li r4,MachineCheck@l
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mtspr IVOR1,r4 /* 1: Machine check */
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li r4,DataStorage@l
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mtspr IVOR2,r4 /* 2: Data storage */
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li r4,InstStorage@l
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mtspr IVOR3,r4 /* 3: Instruction storage */
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li r4,ExtInterrupt@l
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mtspr IVOR4,r4 /* 4: External interrupt */
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li r4,Alignment@l
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mtspr IVOR5,r4 /* 5: Alignment */
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li r4,ProgramCheck@l
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mtspr IVOR6,r4 /* 6: Program check */
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li r4,FPUnavailable@l
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mtspr IVOR7,r4 /* 7: floating point unavailable */
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li r4,SystemCall@l
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mtspr IVOR8,r4 /* 8: System call */
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/* 9: Auxiliary processor unavailable(unsupported) */
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li r4,Decrementer@l
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mtspr IVOR10,r4 /* 10: Decrementer */
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li r4,IntervalTimer@l
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mtspr IVOR11,r4 /* 11: Interval timer */
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li r4,WatchdogTimer@l
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mtspr IVOR12,r4 /* 12: Watchdog timer */
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li r4,DataTLBError@l
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mtspr IVOR13,r4 /* 13: Data TLB error */
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li r4,InstructionTLBError@l
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mtspr IVOR14,r4 /* 14: Instruction TLB error */
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li r4,DebugBreakpoint@l
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mtspr IVOR15,r4 /* 15: Debug */
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#endif
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/* Clear and set up some registers. */
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li r0,0x0000
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lis r1,0xffff
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mtspr DEC,r0 /* prevent dec exceptions */
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mttbl r0 /* prevent fit & wdt exceptions */
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mttbu r0
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mtspr TSR,r1 /* clear all timer exception status */
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mtspr TCR,r0 /* disable all */
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mtspr ESR,r0 /* clear exception syndrome register */
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mtspr MCSR,r0 /* machine check syndrome register */
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mtxer r0 /* clear integer exception register */
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#ifdef CONFIG_SYS_BOOK3E_HV
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mtspr MAS8,r0 /* make sure MAS8 is clear */
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#endif
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/* Enable Time Base and Select Time Base Clock */
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lis r0,HID0_EMCP@h /* Enable machine check */
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#if defined(CONFIG_ENABLE_36BIT_PHYS)
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ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */
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#endif
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#ifndef CONFIG_E500MC
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ori r0,r0,HID0_TBEN@l /* Enable Timebase */
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#endif
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mtspr HID0,r0
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#if !defined(CONFIG_E500MC) && !defined(CONFIG_ARCH_QEMU_E500)
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li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
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mfspr r3,PVR
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andi. r3,r3, 0xff
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cmpwi r3,0x50@l /* if we are rev 5.0 or greater set MBDD */
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blt 1f
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/* Set MBDD bit also */
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ori r0, r0, HID1_MBDD@l
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1:
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mtspr HID1,r0
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#endif
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#ifdef CONFIG_SYS_FSL_ERRATUM_CPU_A003999
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mfspr r3,SPRN_HDBCR1
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oris r3,r3,0x0100
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mtspr SPRN_HDBCR1,r3
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#endif
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/* Enable Branch Prediction */
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#if defined(CONFIG_BTB)
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lis r0,BUCSR_ENABLE@h
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ori r0,r0,BUCSR_ENABLE@l
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mtspr SPRN_BUCSR,r0
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#endif
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#if defined(CONFIG_SYS_INIT_DBCR)
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lis r1,0xffff
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ori r1,r1,0xffff
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mtspr DBSR,r1 /* Clear all status bits */
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lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */
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ori r0,r0,CONFIG_SYS_INIT_DBCR@l
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mtspr DBCR0,r0
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#endif
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#ifdef CONFIG_ARCH_MPC8569
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#define CONFIG_SYS_LBC_ADDR (CONFIG_SYS_CCSRBAR_DEFAULT + 0x5000)
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#define CONFIG_SYS_LBCR_ADDR (CONFIG_SYS_LBC_ADDR + 0xd0)
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/* MPC8569 Rev.0 silcon needs to set bit 13 of LBCR to allow elBC to
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* use address space which is more than 12bits, and it must be done in
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* the 4K boot page. So we set this bit here.
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*/
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/* create a temp mapping TLB0[0] for LBCR */
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create_tlb0_entry 0, \
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0, BOOKE_PAGESZ_4K, \
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CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G, \
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CONFIG_SYS_LBC_ADDR, MAS3_SW|MAS3_SR, \
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0, r6
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/* Set LBCR register */
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lis r4,CONFIG_SYS_LBCR_ADDR@h
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ori r4,r4,CONFIG_SYS_LBCR_ADDR@l
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lis r5,CONFIG_SYS_LBC_LBCR@h
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ori r5,r5,CONFIG_SYS_LBC_LBCR@l
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stw r5,0(r4)
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isync
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/* invalidate this temp TLB */
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lis r4,CONFIG_SYS_LBC_ADDR@h
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ori r4,r4,CONFIG_SYS_LBC_ADDR@l
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tlbivax 0,r4
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isync
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#endif /* CONFIG_ARCH_MPC8569 */
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/*
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* Search for the TLB that covers the code we're executing, and shrink it
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* so that it covers only this 4K page. That will ensure that any other
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* TLB we create won't interfere with it. We assume that the TLB exists,
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* which is why we don't check the Valid bit of MAS1. We also assume
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* it is in TLB1.
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*
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* This is necessary, for example, when booting from the on-chip ROM,
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* which (oddly) creates a single 4GB TLB that covers CCSR and DDR.
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*/
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bl nexti /* Find our address */
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nexti: mflr r1 /* R1 = our PC */
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li r2, 0
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mtspr MAS6, r2 /* Assume the current PID and AS are 0 */
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isync
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msync
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tlbsx 0, r1 /* This must succeed */
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mfspr r14, MAS0 /* Save ESEL for later */
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rlwinm r14, r14, 16, 0xfff
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/* Set the size of the TLB to 4KB */
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mfspr r3, MAS1
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li r2, 0xF80
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andc r3, r3, r2 /* Clear the TSIZE bits */
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ori r3, r3, MAS1_TSIZE(BOOKE_PAGESZ_4K)@l
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oris r3, r3, MAS1_IPROT@h
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mtspr MAS1, r3
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/*
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* Set the base address of the TLB to our PC. We assume that
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* virtual == physical. We also assume that MAS2_EPN == MAS3_RPN.
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*/
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lis r3, MAS2_EPN@h
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ori r3, r3, MAS2_EPN@l /* R3 = MAS2_EPN */
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and r1, r1, r3 /* Our PC, rounded down to the nearest page */
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mfspr r2, MAS2
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andc r2, r2, r3
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or r2, r2, r1
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#ifdef CONFIG_SYS_FSL_ERRATUM_A004510
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cmpwi r27,0
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beq 1f
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andi. r15, r2, MAS2_I|MAS2_G /* save the old I/G for later */
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rlwinm r2, r2, 0, ~MAS2_I
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ori r2, r2, MAS2_G
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1:
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#endif
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mtspr MAS2, r2 /* Set the EPN to our PC base address */
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mfspr r2, MAS3
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andc r2, r2, r3
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or r2, r2, r1
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mtspr MAS3, r2 /* Set the RPN to our PC base address */
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isync
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msync
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tlbwe
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/*
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* Clear out any other TLB entries that may exist, to avoid conflicts.
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* Our TLB entry is in r14.
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*/
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li r0, TLBIVAX_ALL | TLBIVAX_TLB0
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tlbivax 0, r0
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tlbsync
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mfspr r4, SPRN_TLB1CFG
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rlwinm r4, r4, 0, TLBnCFG_NENTRY_MASK
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li r3, 0
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mtspr MAS1, r3
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1: cmpw r3, r14
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rlwinm r5, r3, 16, MAS0_ESEL_MSK
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addi r3, r3, 1
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beq 2f /* skip the entry we're executing from */
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oris r5, r5, MAS0_TLBSEL(1)@h
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mtspr MAS0, r5
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isync
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tlbwe
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isync
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msync
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2: cmpw r3, r4
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blt 1b
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#if defined(CONFIG_SYS_PPC_E500_DEBUG_TLB) && !defined(MINIMAL_SPL) && \
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!defined(CONFIG_SECURE_BOOT)
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/*
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* TLB entry for debuggging in AS1
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* Create temporary TLB entry in AS0 to handle debug exception
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* As on debug exception MSR is cleared i.e. Address space is changed
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* to 0. A TLB entry (in AS0) is required to handle debug exception generated
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* in AS1.
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*/
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#ifdef NOR_BOOT
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/*
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* TLB entry is created for IVPR + IVOR15 to map on valid OP code address
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* bacause flash's virtual address maps to 0xff800000 - 0xffffffff.
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* and this window is outside of 4K boot window.
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*/
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create_tlb1_entry CONFIG_SYS_PPC_E500_DEBUG_TLB, \
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0, BOOKE_PAGESZ_4M, \
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CONFIG_SYS_MONITOR_BASE & 0xffc00000, MAS2_I|MAS2_G, \
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0xffc00000, MAS3_SX|MAS3_SW|MAS3_SR, \
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0, r6
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#else
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/*
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* TLB entry is created for IVPR + IVOR15 to map on valid OP code address
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* because "nexti" will resize TLB to 4K
|
*/
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create_tlb1_entry CONFIG_SYS_PPC_E500_DEBUG_TLB, \
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0, BOOKE_PAGESZ_256K, \
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CONFIG_SYS_MONITOR_BASE & 0xfffc0000, MAS2_I, \
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CONFIG_SYS_MONITOR_BASE & 0xfffc0000, MAS3_SX|MAS3_SW|MAS3_SR, \
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0, r6
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#endif
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#endif
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/*
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* Relocate CCSR, if necessary. We relocate CCSR if (obviously) the default
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* location is not where we want it. This typically happens on a 36-bit
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* system, where we want to move CCSR to near the top of 36-bit address space.
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*
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* To move CCSR, we create two temporary TLBs, one for the old location, and
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* another for the new location. On CoreNet systems, we also need to create
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* a special, temporary LAW.
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*
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* As a general rule, TLB0 is used for short-term TLBs, and TLB1 is used for
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* long-term TLBs, so we use TLB0 here.
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*/
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#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS)
|
|
#if !defined(CONFIG_SYS_CCSRBAR_PHYS_HIGH) || !defined(CONFIG_SYS_CCSRBAR_PHYS_LOW)
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#error "CONFIG_SYS_CCSRBAR_PHYS_HIGH and CONFIG_SYS_CCSRBAR_PHYS_LOW) must be defined."
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#endif
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create_ccsr_new_tlb:
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/*
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* Create a TLB for the new location of CCSR. Register R8 is reserved
|
* for the virtual address of this TLB (CONFIG_SYS_CCSRBAR).
|
*/
|
lis r8, CONFIG_SYS_CCSRBAR@h
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ori r8, r8, CONFIG_SYS_CCSRBAR@l
|
lis r9, (CONFIG_SYS_CCSRBAR + 0x1000)@h
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ori r9, r9, (CONFIG_SYS_CCSRBAR + 0x1000)@l
|
create_tlb0_entry 0, \
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0, BOOKE_PAGESZ_4K, \
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CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G, \
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CONFIG_SYS_CCSRBAR_PHYS_LOW, MAS3_SW|MAS3_SR, \
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CONFIG_SYS_CCSRBAR_PHYS_HIGH, r3
|
/*
|
* Create a TLB for the current location of CCSR. Register R9 is reserved
|
* for the virtual address of this TLB (CONFIG_SYS_CCSRBAR + 0x1000).
|
*/
|
create_ccsr_old_tlb:
|
create_tlb0_entry 1, \
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0, BOOKE_PAGESZ_4K, \
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CONFIG_SYS_CCSRBAR + 0x1000, MAS2_I|MAS2_G, \
|
CONFIG_SYS_CCSRBAR_DEFAULT, MAS3_SW|MAS3_SR, \
|
0, r3 /* The default CCSR address is always a 32-bit number */
|
|
|
/*
|
* We have a TLB for what we think is the current (old) CCSR. Let's
|
* verify that, otherwise we won't be able to move it.
|
* CONFIG_SYS_CCSRBAR_DEFAULT is always a 32-bit number, so we only
|
* need to compare the lower 32 bits of CCSRBAR on CoreNet systems.
|
*/
|
verify_old_ccsr:
|
lis r0, CONFIG_SYS_CCSRBAR_DEFAULT@h
|
ori r0, r0, CONFIG_SYS_CCSRBAR_DEFAULT@l
|
#ifdef CONFIG_FSL_CORENET
|
lwz r1, 4(r9) /* CCSRBARL */
|
#else
|
lwz r1, 0(r9) /* CCSRBAR, shifted right by 12 */
|
slwi r1, r1, 12
|
#endif
|
|
cmpl 0, r0, r1
|
|
/*
|
* If the value we read from CCSRBARL is not what we expect, then
|
* enter an infinite loop. This will at least allow a debugger to
|
* halt execution and examine TLBs, etc. There's no point in going
|
* on.
|
*/
|
infinite_debug_loop:
|
bne infinite_debug_loop
|
|
#ifdef CONFIG_FSL_CORENET
|
|
#define CCSR_LAWBARH0 (CONFIG_SYS_CCSRBAR + 0x1000)
|
#define LAW_SIZE_4K 0xb
|
#define CCSRBAR_LAWAR (LAW_EN | (0x1e << 20) | LAW_SIZE_4K)
|
#define CCSRAR_C 0x80000000 /* Commit */
|
|
create_temp_law:
|
/*
|
* On CoreNet systems, we create the temporary LAW using a special LAW
|
* target ID of 0x1e. LAWBARH is at offset 0xc00 in CCSR.
|
*/
|
lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
|
ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
|
lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
|
ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
|
lis r2, CCSRBAR_LAWAR@h
|
ori r2, r2, CCSRBAR_LAWAR@l
|
|
stw r0, 0xc00(r9) /* LAWBARH0 */
|
stw r1, 0xc04(r9) /* LAWBARL0 */
|
sync
|
stw r2, 0xc08(r9) /* LAWAR0 */
|
|
/*
|
* Read back from LAWAR to ensure the update is complete. e500mc
|
* cores also require an isync.
|
*/
|
lwz r0, 0xc08(r9) /* LAWAR0 */
|
isync
|
|
/*
|
* Read the current CCSRBARH and CCSRBARL using load word instructions.
|
* Follow this with an isync instruction. This forces any outstanding
|
* accesses to configuration space to completion.
|
*/
|
read_old_ccsrbar:
|
lwz r0, 0(r9) /* CCSRBARH */
|
lwz r0, 4(r9) /* CCSRBARL */
|
isync
|
|
/*
|
* Write the new values for CCSRBARH and CCSRBARL to their old
|
* locations. The CCSRBARH has a shadow register. When the CCSRBARH
|
* has a new value written it loads a CCSRBARH shadow register. When
|
* the CCSRBARL is written, the CCSRBARH shadow register contents
|
* along with the CCSRBARL value are loaded into the CCSRBARH and
|
* CCSRBARL registers, respectively. Follow this with a sync
|
* instruction.
|
*/
|
write_new_ccsrbar:
|
lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
|
ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
|
lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
|
ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
|
lis r2, CCSRAR_C@h
|
ori r2, r2, CCSRAR_C@l
|
|
stw r0, 0(r9) /* Write to CCSRBARH */
|
sync /* Make sure we write to CCSRBARH first */
|
stw r1, 4(r9) /* Write to CCSRBARL */
|
sync
|
|
/*
|
* Write a 1 to the commit bit (C) of CCSRAR at the old location.
|
* Follow this with a sync instruction.
|
*/
|
stw r2, 8(r9)
|
sync
|
|
/* Delete the temporary LAW */
|
delete_temp_law:
|
li r1, 0
|
stw r1, 0xc08(r8)
|
sync
|
stw r1, 0xc00(r8)
|
stw r1, 0xc04(r8)
|
sync
|
|
#else /* #ifdef CONFIG_FSL_CORENET */
|
|
write_new_ccsrbar:
|
/*
|
* Read the current value of CCSRBAR using a load word instruction
|
* followed by an isync. This forces all accesses to configuration
|
* space to complete.
|
*/
|
sync
|
lwz r0, 0(r9)
|
isync
|
|
/* CONFIG_SYS_CCSRBAR_PHYS right shifted by 12 */
|
#define CCSRBAR_PHYS_RS12 ((CONFIG_SYS_CCSRBAR_PHYS_HIGH << 20) | \
|
(CONFIG_SYS_CCSRBAR_PHYS_LOW >> 12))
|
|
/* Write the new value to CCSRBAR. */
|
lis r0, CCSRBAR_PHYS_RS12@h
|
ori r0, r0, CCSRBAR_PHYS_RS12@l
|
stw r0, 0(r9)
|
sync
|
|
/*
|
* The manual says to perform a load of an address that does not
|
* access configuration space or the on-chip SRAM using an existing TLB,
|
* but that doesn't appear to be necessary. We will do the isync,
|
* though.
|
*/
|
isync
|
|
/*
|
* Read the contents of CCSRBAR from its new location, followed by
|
* another isync.
|
*/
|
lwz r0, 0(r8)
|
isync
|
|
#endif /* #ifdef CONFIG_FSL_CORENET */
|
|
/* Delete the temporary TLBs */
|
delete_temp_tlbs:
|
delete_tlb0_entry 0, CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G, r3
|
delete_tlb0_entry 1, CONFIG_SYS_CCSRBAR + 0x1000, MAS2_I|MAS2_G, r3
|
|
#endif /* #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS) */
|
|
#if defined(CONFIG_SYS_FSL_QORIQ_CHASSIS2) && defined(CONFIG_E6500)
|
create_ccsr_l2_tlb:
|
/*
|
* Create a TLB for the MMR location of CCSR
|
* to access L2CSR0 register
|
*/
|
create_tlb0_entry 0, \
|
0, BOOKE_PAGESZ_4K, \
|
CONFIG_SYS_CCSRBAR + 0xC20000, MAS2_I|MAS2_G, \
|
CONFIG_SYS_CCSRBAR_PHYS_LOW + 0xC20000, MAS3_SW|MAS3_SR, \
|
CONFIG_SYS_CCSRBAR_PHYS_HIGH, r3
|
|
enable_l2_cluster_l2:
|
/* enable L2 cache */
|
lis r3, (CONFIG_SYS_CCSRBAR + 0xC20000)@h
|
ori r3, r3, (CONFIG_SYS_CCSRBAR + 0xC20000)@l
|
li r4, 33 /* stash id */
|
stw r4, 4(r3)
|
lis r4, (L2CSR0_L2FI|L2CSR0_L2LFC)@h
|
ori r4, r4, (L2CSR0_L2FI|L2CSR0_L2LFC)@l
|
sync
|
stw r4, 0(r3) /* invalidate L2 */
|
/* Poll till the bits are cleared */
|
1: sync
|
lwz r0, 0(r3)
|
twi 0, r0, 0
|
isync
|
and. r1, r0, r4
|
bne 1b
|
|
/* L2PE must be set before L2 cache is enabled */
|
lis r4, (L2CSR0_L2PE)@h
|
ori r4, r4, (L2CSR0_L2PE)@l
|
sync
|
stw r4, 0(r3) /* enable L2 parity/ECC error checking */
|
/* Poll till the bit is set */
|
1: sync
|
lwz r0, 0(r3)
|
twi 0, r0, 0
|
isync
|
and. r1, r0, r4
|
beq 1b
|
|
lis r4, (L2CSR0_L2E|L2CSR0_L2PE)@h
|
ori r4, r4, (L2CSR0_L2REP_MODE)@l
|
sync
|
stw r4, 0(r3) /* enable L2 */
|
/* Poll till the bit is set */
|
1: sync
|
lwz r0, 0(r3)
|
twi 0, r0, 0
|
isync
|
and. r1, r0, r4
|
beq 1b
|
|
delete_ccsr_l2_tlb:
|
delete_tlb0_entry 0, CONFIG_SYS_CCSRBAR + 0xC20000, MAS2_I|MAS2_G, r3
|
#endif
|
|
/*
|
* Enable the L1. On e6500, this has to be done
|
* after the L2 is up.
|
*/
|
|
#ifdef CONFIG_SYS_CACHE_STASHING
|
/* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
|
li r2,(32 + 0)
|
mtspr L1CSR2,r2
|
#endif
|
|
/* Enable/invalidate the I-Cache */
|
lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
|
ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
|
mtspr SPRN_L1CSR1,r2
|
1:
|
mfspr r3,SPRN_L1CSR1
|
and. r1,r3,r2
|
bne 1b
|
|
lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
|
ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
|
mtspr SPRN_L1CSR1,r3
|
isync
|
2:
|
mfspr r3,SPRN_L1CSR1
|
andi. r1,r3,L1CSR1_ICE@l
|
beq 2b
|
|
/* Enable/invalidate the D-Cache */
|
lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
|
ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
|
mtspr SPRN_L1CSR0,r2
|
1:
|
mfspr r3,SPRN_L1CSR0
|
and. r1,r3,r2
|
bne 1b
|
|
lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h
|
ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
|
mtspr SPRN_L1CSR0,r3
|
isync
|
2:
|
mfspr r3,SPRN_L1CSR0
|
andi. r1,r3,L1CSR0_DCE@l
|
beq 2b
|
#ifdef CONFIG_SYS_FSL_ERRATUM_A004510
|
#define DCSR_LAWBARH0 (CONFIG_SYS_CCSRBAR + 0x1000)
|
#define LAW_SIZE_1M 0x13
|
#define DCSRBAR_LAWAR (LAW_EN | (0x1d << 20) | LAW_SIZE_1M)
|
|
cmpwi r27,0
|
beq 9f
|
|
/*
|
* Create a TLB entry for CCSR
|
*
|
* We're executing out of TLB1 entry in r14, and that's the only
|
* TLB entry that exists. To allocate some TLB entries for our
|
* own use, flip a bit high enough that we won't flip it again
|
* via incrementing.
|
*/
|
|
xori r8, r14, 32
|
lis r0, MAS0_TLBSEL(1)@h
|
rlwimi r0, r8, 16, MAS0_ESEL_MSK
|
lis r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_16M)@h
|
ori r1, r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_16M)@l
|
lis r7, CONFIG_SYS_CCSRBAR@h
|
ori r7, r7, CONFIG_SYS_CCSRBAR@l
|
ori r2, r7, MAS2_I|MAS2_G
|
lis r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@h
|
ori r3, r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@l
|
lis r4, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
|
ori r4, r4, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
|
mtspr MAS0, r0
|
mtspr MAS1, r1
|
mtspr MAS2, r2
|
mtspr MAS3, r3
|
mtspr MAS7, r4
|
isync
|
tlbwe
|
isync
|
msync
|
|
/* Map DCSR temporarily to physical address zero */
|
li r0, 0
|
lis r3, DCSRBAR_LAWAR@h
|
ori r3, r3, DCSRBAR_LAWAR@l
|
|
stw r0, 0xc00(r7) /* LAWBARH0 */
|
stw r0, 0xc04(r7) /* LAWBARL0 */
|
sync
|
stw r3, 0xc08(r7) /* LAWAR0 */
|
|
/* Read back from LAWAR to ensure the update is complete. */
|
lwz r3, 0xc08(r7) /* LAWAR0 */
|
isync
|
|
/* Create a TLB entry for DCSR at zero */
|
|
addi r9, r8, 1
|
lis r0, MAS0_TLBSEL(1)@h
|
rlwimi r0, r9, 16, MAS0_ESEL_MSK
|
lis r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_1M)@h
|
ori r1, r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_1M)@l
|
li r6, 0 /* DCSR effective address */
|
ori r2, r6, MAS2_I|MAS2_G
|
li r3, MAS3_SW|MAS3_SR
|
li r4, 0
|
mtspr MAS0, r0
|
mtspr MAS1, r1
|
mtspr MAS2, r2
|
mtspr MAS3, r3
|
mtspr MAS7, r4
|
isync
|
tlbwe
|
isync
|
msync
|
|
/* enable the timebase */
|
#define CTBENR 0xe2084
|
li r3, 1
|
addis r4, r7, CTBENR@ha
|
stw r3, CTBENR@l(r4)
|
lwz r3, CTBENR@l(r4)
|
twi 0,r3,0
|
isync
|
|
.macro erratum_set_ccsr offset value
|
addis r3, r7, \offset@ha
|
lis r4, \value@h
|
addi r3, r3, \offset@l
|
ori r4, r4, \value@l
|
bl erratum_set_value
|
.endm
|
|
.macro erratum_set_dcsr offset value
|
addis r3, r6, \offset@ha
|
lis r4, \value@h
|
addi r3, r3, \offset@l
|
ori r4, r4, \value@l
|
bl erratum_set_value
|
.endm
|
|
erratum_set_dcsr 0xb0e08 0xe0201800
|
erratum_set_dcsr 0xb0e18 0xe0201800
|
erratum_set_dcsr 0xb0e38 0xe0400000
|
erratum_set_dcsr 0xb0008 0x00900000
|
erratum_set_dcsr 0xb0e40 0xe00a0000
|
erratum_set_ccsr 0x18600 CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY
|
#ifdef CONFIG_RAMBOOT_PBL
|
erratum_set_ccsr 0x10f00 0x495e5000
|
#else
|
erratum_set_ccsr 0x10f00 0x415e5000
|
#endif
|
erratum_set_ccsr 0x11f00 0x415e5000
|
|
/* Make temp mapping uncacheable again, if it was initially */
|
bl 2f
|
2: mflr r3
|
tlbsx 0, r3
|
mfspr r4, MAS2
|
rlwimi r4, r15, 0, MAS2_I
|
rlwimi r4, r15, 0, MAS2_G
|
mtspr MAS2, r4
|
isync
|
tlbwe
|
isync
|
msync
|
|
/* Clear the cache */
|
lis r3,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
|
ori r3,r3,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
|
sync
|
isync
|
mtspr SPRN_L1CSR1,r3
|
isync
|
2: sync
|
mfspr r4,SPRN_L1CSR1
|
and. r4,r4,r3
|
bne 2b
|
|
lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
|
ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
|
sync
|
isync
|
mtspr SPRN_L1CSR1,r3
|
isync
|
2: sync
|
mfspr r4,SPRN_L1CSR1
|
and. r4,r4,r3
|
beq 2b
|
|
/* Remove temporary mappings */
|
lis r0, MAS0_TLBSEL(1)@h
|
rlwimi r0, r9, 16, MAS0_ESEL_MSK
|
li r3, 0
|
mtspr MAS0, r0
|
mtspr MAS1, r3
|
isync
|
tlbwe
|
isync
|
msync
|
|
li r3, 0
|
stw r3, 0xc08(r7) /* LAWAR0 */
|
lwz r3, 0xc08(r7)
|
isync
|
|
lis r0, MAS0_TLBSEL(1)@h
|
rlwimi r0, r8, 16, MAS0_ESEL_MSK
|
li r3, 0
|
mtspr MAS0, r0
|
mtspr MAS1, r3
|
isync
|
tlbwe
|
isync
|
msync
|
|
b 9f
|
|
/* r3 = addr, r4 = value, clobbers r5, r11, r12 */
|
erratum_set_value:
|
/* Lock two cache lines into I-Cache */
|
sync
|
mfspr r11, SPRN_L1CSR1
|
rlwinm r11, r11, 0, ~L1CSR1_ICUL
|
sync
|
isync
|
mtspr SPRN_L1CSR1, r11
|
isync
|
|
mflr r12
|
bl 5f
|
5: mflr r5
|
addi r5, r5, 2f - 5b
|
icbtls 0, 0, r5
|
addi r5, r5, 64
|
|
sync
|
mfspr r11, SPRN_L1CSR1
|
3: andi. r11, r11, L1CSR1_ICUL
|
bne 3b
|
|
icbtls 0, 0, r5
|
addi r5, r5, 64
|
|
sync
|
mfspr r11, SPRN_L1CSR1
|
3: andi. r11, r11, L1CSR1_ICUL
|
bne 3b
|
|
b 2f
|
.align 6
|
/* Inside a locked cacheline, wait a while, write, then wait a while */
|
2: sync
|
|
mfspr r5, SPRN_TBRL
|
addis r11, r5, 0x10000@h /* wait 65536 timebase ticks */
|
4: mfspr r5, SPRN_TBRL
|
subf. r5, r5, r11
|
bgt 4b
|
|
stw r4, 0(r3)
|
|
mfspr r5, SPRN_TBRL
|
addis r11, r5, 0x10000@h /* wait 65536 timebase ticks */
|
4: mfspr r5, SPRN_TBRL
|
subf. r5, r5, r11
|
bgt 4b
|
|
sync
|
|
/*
|
* Fill out the rest of this cache line and the next with nops,
|
* to ensure that nothing outside the locked area will be
|
* fetched due to a branch.
|
*/
|
.rept 19
|
nop
|
.endr
|
|
sync
|
mfspr r11, SPRN_L1CSR1
|
rlwinm r11, r11, 0, ~L1CSR1_ICUL
|
sync
|
isync
|
mtspr SPRN_L1CSR1, r11
|
isync
|
|
mtlr r12
|
blr
|
|
9:
|
#endif
|
|
create_init_ram_area:
|
lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h
|
ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l
|
|
#ifdef NOR_BOOT
|
/* create a temp mapping in AS=1 to the 4M boot window */
|
create_tlb1_entry 15, \
|
1, BOOKE_PAGESZ_4M, \
|
CONFIG_SYS_MONITOR_BASE & 0xffc00000, MAS2_I|MAS2_G, \
|
0xffc00000, MAS3_SX|MAS3_SW|MAS3_SR, \
|
0, r6
|
|
#elif !defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SECURE_BOOT)
|
/* create a temp mapping in AS = 1 for Flash mapping
|
* created by PBL for ISBC code
|
*/
|
create_tlb1_entry 15, \
|
1, BOOKE_PAGESZ_1M, \
|
CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS2_I|MAS2_G, \
|
CONFIG_SYS_PBI_FLASH_WINDOW & 0xfff00000, MAS3_SX|MAS3_SW|MAS3_SR, \
|
0, r6
|
|
/*
|
* For Targets without CONFIG_SPL like P3, P5
|
* and for targets with CONFIG_SPL like T1, T2, T4, only for
|
* u-boot-spl i.e. CONFIG_SPL_BUILD
|
*/
|
#elif defined(CONFIG_RAMBOOT_PBL) && defined(CONFIG_SECURE_BOOT) && \
|
(!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
|
/* create a temp mapping in AS = 1 for mapping CONFIG_SYS_MONITOR_BASE
|
* to L3 Address configured by PBL for ISBC code
|
*/
|
create_tlb1_entry 15, \
|
1, BOOKE_PAGESZ_1M, \
|
CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS2_I|MAS2_G, \
|
CONFIG_SYS_INIT_L3_ADDR & 0xfff00000, MAS3_SX|MAS3_SW|MAS3_SR, \
|
0, r6
|
|
#else
|
/*
|
* create a temp mapping in AS=1 to the 1M CONFIG_SYS_MONITOR_BASE space, the main
|
* image has been relocated to CONFIG_SYS_MONITOR_BASE on the second stage.
|
*/
|
create_tlb1_entry 15, \
|
1, BOOKE_PAGESZ_1M, \
|
CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS2_I|MAS2_G, \
|
CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS3_SX|MAS3_SW|MAS3_SR, \
|
0, r6
|
#endif
|
|
/* create a temp mapping in AS=1 to the stack */
|
#if defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW) && \
|
defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH)
|
create_tlb1_entry 14, \
|
1, BOOKE_PAGESZ_16K, \
|
CONFIG_SYS_INIT_RAM_ADDR, 0, \
|
CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, MAS3_SX|MAS3_SW|MAS3_SR, \
|
CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH, r6
|
|
#else
|
create_tlb1_entry 14, \
|
1, BOOKE_PAGESZ_16K, \
|
CONFIG_SYS_INIT_RAM_ADDR, 0, \
|
CONFIG_SYS_INIT_RAM_ADDR, MAS3_SX|MAS3_SW|MAS3_SR, \
|
0, r6
|
#endif
|
|
lis r6,MSR_IS|MSR_DS|MSR_DE@h
|
ori r6,r6,MSR_IS|MSR_DS|MSR_DE@l
|
lis r7,switch_as@h
|
ori r7,r7,switch_as@l
|
|
mtspr SPRN_SRR0,r7
|
mtspr SPRN_SRR1,r6
|
rfi
|
|
switch_as:
|
/* L1 DCache is used for initial RAM */
|
|
/* Allocate Initial RAM in data cache.
|
*/
|
lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
|
ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
|
mfspr r2, L1CFG0
|
andi. r2, r2, 0x1ff
|
/* cache size * 1024 / (2 * L1 line size) */
|
slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT)
|
mtctr r2
|
li r0,0
|
1:
|
dcbz r0,r3
|
#ifdef CONFIG_E6500 /* Lock/unlock L2 cache long with L1 */
|
dcbtls 2, r0, r3
|
dcbtls 0, r0, r3
|
#else
|
dcbtls 0, r0, r3
|
#endif
|
addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
|
bdnz 1b
|
|
/* Jump out the last 4K page and continue to 'normal' start */
|
#if defined(CONFIG_SYS_RAMBOOT) || defined(CONFIG_SPL)
|
/* We assume that we're already running at the address we're linked at */
|
b _start_cont
|
#else
|
/* Calculate absolute address in FLASH and jump there */
|
/*--------------------------------------------------------------*/
|
lis r3,CONFIG_SYS_MONITOR_BASE@h
|
ori r3,r3,CONFIG_SYS_MONITOR_BASE@l
|
addi r3,r3,_start_cont - _start
|
mtlr r3
|
blr
|
#endif
|
|
.text
|
.globl _start
|
_start:
|
.long 0x27051956 /* U-BOOT Magic Number */
|
.globl version_string
|
version_string:
|
.ascii U_BOOT_VERSION_STRING, "\0"
|
|
.align 4
|
.globl _start_cont
|
_start_cont:
|
/* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/
|
lis r3,(CONFIG_SYS_INIT_RAM_ADDR)@h
|
ori r3,r3,((CONFIG_SYS_INIT_SP_OFFSET-16)&~0xf)@l /* Align to 16 */
|
|
#if CONFIG_VAL(SYS_MALLOC_F_LEN)
|
#if CONFIG_VAL(SYS_MALLOC_F_LEN) + GENERATED_GBL_DATA_SIZE > CONFIG_SYS_INIT_RAM_SIZE
|
#error "SYS_MALLOC_F_LEN too large to fit into initial RAM."
|
#endif
|
|
/* Leave 16+ byte for back chain termination and NULL return address */
|
subi r3,r3,((CONFIG_VAL(SYS_MALLOC_F_LEN)+16+15)&~0xf)
|
#endif
|
|
/* End of RAM */
|
lis r4,(CONFIG_SYS_INIT_RAM_ADDR)@h
|
ori r4,r4,(CONFIG_SYS_INIT_RAM_SIZE)@l
|
|
li r0,0
|
|
1: subi r4,r4,4
|
stw r0,0(r4)
|
cmplw r4,r3
|
bne 1b
|
|
#if CONFIG_VAL(SYS_MALLOC_F_LEN)
|
lis r4,(CONFIG_SYS_INIT_RAM_ADDR)@h
|
ori r4,r4,(CONFIG_SYS_GBL_DATA_OFFSET)@l
|
|
addi r3,r3,16 /* Pre-relocation malloc area */
|
stw r3,GD_MALLOC_BASE(r4)
|
subi r3,r3,16
|
#endif
|
li r0,0
|
stw r0,0(r3) /* Terminate Back Chain */
|
stw r0,+4(r3) /* NULL return address. */
|
mr r1,r3 /* Transfer to SP(r1) */
|
|
GET_GOT
|
|
/* Pass our potential ePAPR device tree pointer to cpu_init_early_f */
|
mr r3, r24
|
|
bl cpu_init_early_f
|
|
/* switch back to AS = 0 */
|
lis r3,(MSR_CE|MSR_ME|MSR_DE)@h
|
ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l
|
mtmsr r3
|
isync
|
|
bl cpu_init_f /* return boot_flag for calling board_init_f */
|
bl board_init_f
|
isync
|
|
/* NOTREACHED - board_init_f() does not return */
|
|
#ifndef MINIMAL_SPL
|
.globl _start_of_vectors
|
_start_of_vectors:
|
|
/* Critical input. */
|
CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException)
|
|
/* Machine check */
|
MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
|
|
/* Data Storage exception. */
|
STD_EXCEPTION(0x0300, DataStorage, UnknownException)
|
|
/* Instruction Storage exception. */
|
STD_EXCEPTION(0x0400, InstStorage, UnknownException)
|
|
/* External Interrupt exception. */
|
STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException)
|
|
/* Alignment exception. */
|
Alignment:
|
EXCEPTION_PROLOG(SRR0, SRR1)
|
mfspr r4,DAR
|
stw r4,_DAR(r21)
|
mfspr r5,DSISR
|
stw r5,_DSISR(r21)
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
EXC_XFER_TEMPLATE(0x600, Alignment, AlignmentException,
|
MSR_KERNEL, COPY_EE)
|
|
/* Program check exception */
|
ProgramCheck:
|
EXCEPTION_PROLOG(SRR0, SRR1)
|
addi r3,r1,STACK_FRAME_OVERHEAD
|
EXC_XFER_TEMPLATE(0x700, ProgramCheck, ProgramCheckException,
|
MSR_KERNEL, COPY_EE)
|
|
/* No FPU on MPC85xx. This exception is not supposed to happen.
|
*/
|
STD_EXCEPTION(0x0800, FPUnavailable, UnknownException)
|
STD_EXCEPTION(0x0900, SystemCall, UnknownException)
|
STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt)
|
STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException)
|
STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException)
|
|
STD_EXCEPTION(0x0d00, DataTLBError, UnknownException)
|
STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)
|
|
CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException )
|
|
.globl _end_of_vectors
|
_end_of_vectors:
|
|
|
. = . + (0x100 - ( . & 0xff )) /* align for debug */
|
|
/*
|
* This code finishes saving the registers to the exception frame
|
* and jumps to the appropriate handler for the exception.
|
* Register r21 is pointer into trap frame, r1 has new stack pointer.
|
* r23 is the address of the handler.
|
*/
|
.globl transfer_to_handler
|
transfer_to_handler:
|
SAVE_GPR(7, r21)
|
SAVE_4GPRS(8, r21)
|
SAVE_8GPRS(12, r21)
|
SAVE_8GPRS(24, r21)
|
|
li r22,0
|
stw r22,RESULT(r21)
|
mtspr SPRG2,r22 /* r1 is now kernel sp */
|
|
mtctr r23 /* virtual address of handler */
|
mtmsr r20
|
bctrl
|
|
int_return:
|
mfmsr r28 /* Disable interrupts */
|
li r4,0
|
ori r4,r4,MSR_EE
|
andc r28,r28,r4
|
SYNC /* Some chip revs need this... */
|
mtmsr r28
|
SYNC
|
lwz r2,_CTR(r1)
|
lwz r0,_LINK(r1)
|
mtctr r2
|
mtlr r0
|
lwz r2,_XER(r1)
|
lwz r0,_CCR(r1)
|
mtspr XER,r2
|
mtcrf 0xFF,r0
|
REST_10GPRS(3, r1)
|
REST_10GPRS(13, r1)
|
REST_8GPRS(23, r1)
|
REST_GPR(31, r1)
|
lwz r2,_NIP(r1) /* Restore environment */
|
lwz r0,_MSR(r1)
|
mtspr SRR0,r2
|
mtspr SRR1,r0
|
lwz r0,GPR0(r1)
|
lwz r2,GPR2(r1)
|
lwz r1,GPR1(r1)
|
SYNC
|
rfi
|
|
/* Cache functions.
|
*/
|
.globl flush_icache
|
flush_icache:
|
.globl invalidate_icache
|
invalidate_icache:
|
mfspr r0,L1CSR1
|
ori r0,r0,L1CSR1_ICFI
|
msync
|
isync
|
mtspr L1CSR1,r0
|
isync
|
blr /* entire I cache */
|
|
.globl invalidate_dcache
|
invalidate_dcache:
|
mfspr r0,L1CSR0
|
ori r0,r0,L1CSR0_DCFI
|
msync
|
isync
|
mtspr L1CSR0,r0
|
isync
|
blr
|
|
.globl icache_enable
|
icache_enable:
|
mflr r8
|
bl invalidate_icache
|
mtlr r8
|
isync
|
mfspr r4,L1CSR1
|
ori r4,r4,(L1CSR1_CPE | L1CSR1_ICE)@l
|
oris r4,r4,(L1CSR1_CPE | L1CSR1_ICE)@h
|
mtspr L1CSR1,r4
|
isync
|
blr
|
|
.globl icache_disable
|
icache_disable:
|
mfspr r0,L1CSR1
|
lis r3,0
|
ori r3,r3,L1CSR1_ICE
|
andc r0,r0,r3
|
mtspr L1CSR1,r0
|
isync
|
blr
|
|
.globl icache_status
|
icache_status:
|
mfspr r3,L1CSR1
|
andi. r3,r3,L1CSR1_ICE
|
blr
|
|
.globl dcache_enable
|
dcache_enable:
|
mflr r8
|
bl invalidate_dcache
|
mtlr r8
|
isync
|
mfspr r0,L1CSR0
|
ori r0,r0,(L1CSR0_CPE | L1CSR0_DCE)@l
|
oris r0,r0,(L1CSR0_CPE | L1CSR0_DCE)@h
|
msync
|
isync
|
mtspr L1CSR0,r0
|
isync
|
blr
|
|
.globl dcache_disable
|
dcache_disable:
|
mfspr r3,L1CSR0
|
lis r4,0
|
ori r4,r4,L1CSR0_DCE
|
andc r3,r3,r4
|
mtspr L1CSR0,r3
|
isync
|
blr
|
|
.globl dcache_status
|
dcache_status:
|
mfspr r3,L1CSR0
|
andi. r3,r3,L1CSR0_DCE
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: in8 */
|
/* Description: Input 8 bits */
|
/*------------------------------------------------------------------------------- */
|
.globl in8
|
in8:
|
lbz r3,0x0000(r3)
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: out8 */
|
/* Description: Output 8 bits */
|
/*------------------------------------------------------------------------------- */
|
.globl out8
|
out8:
|
stb r4,0x0000(r3)
|
sync
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: out16 */
|
/* Description: Output 16 bits */
|
/*------------------------------------------------------------------------------- */
|
.globl out16
|
out16:
|
sth r4,0x0000(r3)
|
sync
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: out16r */
|
/* Description: Byte reverse and output 16 bits */
|
/*------------------------------------------------------------------------------- */
|
.globl out16r
|
out16r:
|
sthbrx r4,r0,r3
|
sync
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: out32 */
|
/* Description: Output 32 bits */
|
/*------------------------------------------------------------------------------- */
|
.globl out32
|
out32:
|
stw r4,0x0000(r3)
|
sync
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: out32r */
|
/* Description: Byte reverse and output 32 bits */
|
/*------------------------------------------------------------------------------- */
|
.globl out32r
|
out32r:
|
stwbrx r4,r0,r3
|
sync
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: in16 */
|
/* Description: Input 16 bits */
|
/*------------------------------------------------------------------------------- */
|
.globl in16
|
in16:
|
lhz r3,0x0000(r3)
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: in16r */
|
/* Description: Input 16 bits and byte reverse */
|
/*------------------------------------------------------------------------------- */
|
.globl in16r
|
in16r:
|
lhbrx r3,r0,r3
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: in32 */
|
/* Description: Input 32 bits */
|
/*------------------------------------------------------------------------------- */
|
.globl in32
|
in32:
|
lwz 3,0x0000(3)
|
blr
|
|
/*------------------------------------------------------------------------------- */
|
/* Function: in32r */
|
/* Description: Input 32 bits and byte reverse */
|
/*------------------------------------------------------------------------------- */
|
.globl in32r
|
in32r:
|
lwbrx r3,r0,r3
|
blr
|
#endif /* !MINIMAL_SPL */
|
|
/*------------------------------------------------------------------------------*/
|
|
/*
|
* void write_tlb(mas0, mas1, mas2, mas3, mas7)
|
*/
|
.globl write_tlb
|
write_tlb:
|
mtspr MAS0,r3
|
mtspr MAS1,r4
|
mtspr MAS2,r5
|
mtspr MAS3,r6
|
#ifdef CONFIG_ENABLE_36BIT_PHYS
|
mtspr MAS7,r7
|
#endif
|
li r3,0
|
#ifdef CONFIG_SYS_BOOK3E_HV
|
mtspr MAS8,r3
|
#endif
|
isync
|
tlbwe
|
msync
|
isync
|
blr
|
|
/*
|
* void relocate_code (addr_sp, gd, addr_moni)
|
*
|
* This "function" does not return, instead it continues in RAM
|
* after relocating the monitor code.
|
*
|
* r3 = dest
|
* r4 = src
|
* r5 = length in bytes
|
* r6 = cachelinesize
|
*/
|
.globl relocate_code
|
relocate_code:
|
mr r1,r3 /* Set new stack pointer */
|
mr r9,r4 /* Save copy of Init Data pointer */
|
mr r10,r5 /* Save copy of Destination Address */
|
|
GET_GOT
|
#ifndef CONFIG_SPL_SKIP_RELOCATE
|
mr r3,r5 /* Destination Address */
|
lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */
|
ori r4,r4,CONFIG_SYS_MONITOR_BASE@l
|
lwz r5,GOT(__init_end)
|
sub r5,r5,r4
|
li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
|
|
/*
|
* Fix GOT pointer:
|
*
|
* New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
|
*
|
* Offset:
|
*/
|
sub r15,r10,r4
|
|
/* First our own GOT */
|
add r12,r12,r15
|
/* the the one used by the C code */
|
add r30,r30,r15
|
|
/*
|
* Now relocate code
|
*/
|
|
cmplw cr1,r3,r4
|
addi r0,r5,3
|
srwi. r0,r0,2
|
beq cr1,4f /* In place copy is not necessary */
|
beq 7f /* Protect against 0 count */
|
mtctr r0
|
bge cr1,2f
|
|
la r8,-4(r4)
|
la r7,-4(r3)
|
1: lwzu r0,4(r8)
|
stwu r0,4(r7)
|
bdnz 1b
|
b 4f
|
|
2: slwi r0,r0,2
|
add r8,r4,r0
|
add r7,r3,r0
|
3: lwzu r0,-4(r8)
|
stwu r0,-4(r7)
|
bdnz 3b
|
|
/*
|
* Now flush the cache: note that we must start from a cache aligned
|
* address. Otherwise we might miss one cache line.
|
*/
|
4: cmpwi r6,0
|
add r5,r3,r5
|
beq 7f /* Always flush prefetch queue in any case */
|
subi r0,r6,1
|
andc r3,r3,r0
|
mr r4,r3
|
5: dcbst 0,r4
|
add r4,r4,r6
|
cmplw r4,r5
|
blt 5b
|
sync /* Wait for all dcbst to complete on bus */
|
mr r4,r3
|
6: icbi 0,r4
|
add r4,r4,r6
|
cmplw r4,r5
|
blt 6b
|
7: sync /* Wait for all icbi to complete on bus */
|
isync
|
|
/*
|
* We are done. Do not return, instead branch to second part of board
|
* initialization, now running from RAM.
|
*/
|
|
addi r0,r10,in_ram - _start
|
|
/*
|
* As IVPR is going to point RAM address,
|
* Make sure IVOR15 has valid opcode to support debugger
|
*/
|
mtspr IVOR15,r0
|
|
/*
|
* Re-point the IVPR at RAM
|
*/
|
mtspr IVPR,r10
|
|
mtlr r0
|
blr /* NEVER RETURNS! */
|
#endif
|
.globl in_ram
|
in_ram:
|
|
/*
|
* Relocation Function, r12 point to got2+0x8000
|
*
|
* Adjust got2 pointers, no need to check for 0, this code
|
* already puts a few entries in the table.
|
*/
|
li r0,__got2_entries@sectoff@l
|
la r3,GOT(_GOT2_TABLE_)
|
lwz r11,GOT(_GOT2_TABLE_)
|
mtctr r0
|
sub r11,r3,r11
|
addi r3,r3,-4
|
1: lwzu r0,4(r3)
|
cmpwi r0,0
|
beq- 2f
|
add r0,r0,r11
|
stw r0,0(r3)
|
2: bdnz 1b
|
|
/*
|
* Now adjust the fixups and the pointers to the fixups
|
* in case we need to move ourselves again.
|
*/
|
li r0,__fixup_entries@sectoff@l
|
lwz r3,GOT(_FIXUP_TABLE_)
|
cmpwi r0,0
|
mtctr r0
|
addi r3,r3,-4
|
beq 4f
|
3: lwzu r4,4(r3)
|
lwzux r0,r4,r11
|
cmpwi r0,0
|
add r0,r0,r11
|
stw r4,0(r3)
|
beq- 5f
|
stw r0,0(r4)
|
5: bdnz 3b
|
4:
|
clear_bss:
|
/*
|
* Now clear BSS segment
|
*/
|
lwz r3,GOT(__bss_start)
|
lwz r4,GOT(__bss_end)
|
|
cmplw 0,r3,r4
|
beq 6f
|
|
li r0,0
|
5:
|
stw r0,0(r3)
|
addi r3,r3,4
|
cmplw 0,r3,r4
|
blt 5b
|
6:
|
|
mr r3,r9 /* Init Data pointer */
|
mr r4,r10 /* Destination Address */
|
bl board_init_r
|
|
#ifndef MINIMAL_SPL
|
/*
|
* Copy exception vector code to low memory
|
*
|
* r3: dest_addr
|
* r7: source address, r8: end address, r9: target address
|
*/
|
.globl trap_init
|
trap_init:
|
mflr r11
|
bl _GLOBAL_OFFSET_TABLE_-4
|
mflr r12
|
|
/* Update IVORs as per relocation */
|
mtspr IVPR,r3
|
|
lwz r4,CriticalInput@got(r12)
|
mtspr IVOR0,r4 /* 0: Critical input */
|
lwz r4,MachineCheck@got(r12)
|
mtspr IVOR1,r4 /* 1: Machine check */
|
lwz r4,DataStorage@got(r12)
|
mtspr IVOR2,r4 /* 2: Data storage */
|
lwz r4,InstStorage@got(r12)
|
mtspr IVOR3,r4 /* 3: Instruction storage */
|
lwz r4,ExtInterrupt@got(r12)
|
mtspr IVOR4,r4 /* 4: External interrupt */
|
lwz r4,Alignment@got(r12)
|
mtspr IVOR5,r4 /* 5: Alignment */
|
lwz r4,ProgramCheck@got(r12)
|
mtspr IVOR6,r4 /* 6: Program check */
|
lwz r4,FPUnavailable@got(r12)
|
mtspr IVOR7,r4 /* 7: floating point unavailable */
|
lwz r4,SystemCall@got(r12)
|
mtspr IVOR8,r4 /* 8: System call */
|
/* 9: Auxiliary processor unavailable(unsupported) */
|
lwz r4,Decrementer@got(r12)
|
mtspr IVOR10,r4 /* 10: Decrementer */
|
lwz r4,IntervalTimer@got(r12)
|
mtspr IVOR11,r4 /* 11: Interval timer */
|
lwz r4,WatchdogTimer@got(r12)
|
mtspr IVOR12,r4 /* 12: Watchdog timer */
|
lwz r4,DataTLBError@got(r12)
|
mtspr IVOR13,r4 /* 13: Data TLB error */
|
lwz r4,InstructionTLBError@got(r12)
|
mtspr IVOR14,r4 /* 14: Instruction TLB error */
|
lwz r4,DebugBreakpoint@got(r12)
|
mtspr IVOR15,r4 /* 15: Debug */
|
|
mtlr r11
|
blr
|
|
.globl unlock_ram_in_cache
|
unlock_ram_in_cache:
|
/* invalidate the INIT_RAM section */
|
lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h
|
ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l
|
mfspr r4,L1CFG0
|
andi. r4,r4,0x1ff
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slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT)
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mtctr r4
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1: dcbi r0,r3
|
#ifdef CONFIG_E6500 /* lock/unlock L2 cache long with L1 */
|
dcblc 2, r0, r3
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dcblc 0, r0, r3
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#else
|
dcblc r0,r3
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#endif
|
addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
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bdnz 1b
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sync
|
|
/* Invalidate the TLB entries for the cache */
|
lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
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ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
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tlbivax 0,r3
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addi r3,r3,0x1000
|
tlbivax 0,r3
|
addi r3,r3,0x1000
|
tlbivax 0,r3
|
addi r3,r3,0x1000
|
tlbivax 0,r3
|
isync
|
blr
|
|
.globl flush_dcache
|
flush_dcache:
|
mfspr r3,SPRN_L1CFG0
|
|
rlwinm r5,r3,9,3 /* Extract cache block size */
|
twlgti r5,1 /* Only 32 and 64 byte cache blocks
|
* are currently defined.
|
*/
|
li r4,32
|
subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
|
* log2(number of ways)
|
*/
|
slw r5,r4,r5 /* r5 = cache block size */
|
|
rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
|
mulli r7,r7,13 /* An 8-way cache will require 13
|
* loads per set.
|
*/
|
slw r7,r7,r6
|
|
/* save off HID0 and set DCFA */
|
mfspr r8,SPRN_HID0
|
ori r9,r8,HID0_DCFA@l
|
mtspr SPRN_HID0,r9
|
isync
|
|
lis r4,0
|
mtctr r7
|
|
1: lwz r3,0(r4) /* Load... */
|
add r4,r4,r5
|
bdnz 1b
|
|
msync
|
lis r4,0
|
mtctr r7
|
|
1: dcbf 0,r4 /* ...and flush. */
|
add r4,r4,r5
|
bdnz 1b
|
|
/* restore HID0 */
|
mtspr SPRN_HID0,r8
|
isync
|
|
blr
|
#endif /* !MINIMAL_SPL */
|
