mirror of
https://github.com/AsahiLinux/u-boot
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d217a9ad01
Erratum A-005812 Incorrect reservation clearing in Write Shadow mode can result in invalid atomic operations. For u-boot, this erratum only impacts SoCs running in write shadow mode. Signed-off-by: York Sun <yorksun@freescale.com>
492 lines
11 KiB
ArmAsm
492 lines
11 KiB
ArmAsm
/*
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* Copyright 2008-2012 Freescale Semiconductor, Inc.
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* Kumar Gala <kumar.gala@freescale.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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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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#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
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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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/* To boot secondary cpus, we need a place for them to start up.
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* Normally, they start at 0xfffffffc, but that's usually the
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* firmware, and we don't want to have to run the firmware again.
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* Instead, the primary cpu will set the BPTR to point here to
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* this page. We then set up the core, and head to
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* start_secondary. Note that this means that the code below
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* must never exceed 1023 instructions (the branch at the end
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* would then be the 1024th).
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*/
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.globl __secondary_start_page
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.align 12
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__secondary_start_page:
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/* First do some preliminary setup */
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lis r3, HID0_EMCP@h /* enable machine check */
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#ifndef CONFIG_E500MC
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ori r3,r3,HID0_TBEN@l /* enable Timebase */
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#endif
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#ifdef CONFIG_PHYS_64BIT
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ori r3,r3,HID0_ENMAS7@l /* enable MAS7 updates */
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#endif
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mtspr SPRN_HID0,r3
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#ifndef CONFIG_E500MC
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li r3,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
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mfspr r0,PVR
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andi. r0,r0,0xff
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cmpwi r0,0x50@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 r3, r3, HID1_MBDD@l
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1:
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mtspr SPRN_HID1,r3
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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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#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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b 2f
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1: /* 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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/* Enable branch prediction */
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lis r3,BUCSR_ENABLE@h
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ori r3,r3,BUCSR_ENABLE@l
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mtspr SPRN_BUCSR,r3
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/* Ensure TB is 0 */
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li r3,0
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mttbl r3
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mttbu r3
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/* Enable/invalidate the I-Cache */
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lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
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ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
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mtspr SPRN_L1CSR1,r2
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1:
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mfspr r3,SPRN_L1CSR1
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and. r1,r3,r2
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bne 1b
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lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
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ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
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mtspr SPRN_L1CSR1,r3
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isync
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2:
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mfspr r3,SPRN_L1CSR1
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andi. r1,r3,L1CSR1_ICE@l
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beq 2b
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/* Enable/invalidate the D-Cache */
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lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
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ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
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mtspr SPRN_L1CSR0,r2
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1:
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mfspr r3,SPRN_L1CSR0
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and. r1,r3,r2
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bne 1b
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lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h
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ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
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mtspr SPRN_L1CSR0,r3
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isync
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2:
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mfspr r3,SPRN_L1CSR0
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andi. r1,r3,L1CSR0_DCE@l
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beq 2b
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#define toreset(x) (x - __secondary_start_page + 0xfffff000)
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/* get our PIR to figure out our table entry */
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lis r3,toreset(__spin_table_addr)@h
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ori r3,r3,toreset(__spin_table_addr)@l
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lwz r3,0(r3)
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mfspr r0,SPRN_PIR
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#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
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/*
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* PIR definition for Chassis 2
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* 0-17 Reserved (logic 0s)
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* 18-19 CHIP_ID, 2'b00 - SoC 1
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* all others - reserved
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* 20-24 CLUSTER_ID 5'b00000 - CCM 1
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* all others - reserved
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* 25-26 CORE_CLUSTER_ID 2'b00 - cluster 1
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* 2'b01 - cluster 2
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* 2'b10 - cluster 3
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* 2'b11 - cluster 4
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* 27-28 CORE_ID 2'b00 - core 0
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* 2'b01 - core 1
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* 2'b10 - core 2
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* 2'b11 - core 3
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* 29-31 THREAD_ID 3'b000 - thread 0
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* 3'b001 - thread 1
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*
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* Power-on PIR increments threads by 0x01, cores within a cluster by 0x08
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* and clusters by 0x20.
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*
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* We renumber PIR so that all threads in the system are consecutive.
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*/
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rlwinm r8,r0,29,0x03 /* r8 = core within cluster */
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srwi r10,r0,5 /* r10 = cluster */
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mulli r5,r10,CONFIG_SYS_FSL_CORES_PER_CLUSTER
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add r5,r5,r8 /* for spin table index */
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mulli r4,r5,CONFIG_SYS_FSL_THREADS_PER_CORE /* for PIR */
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#elif defined(CONFIG_E500MC)
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rlwinm r4,r0,27,27,31
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mr r5,r4
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#else
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mr r4,r0
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mr r5,r4
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#endif
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/*
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* r10 has the base address for the entry.
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* we cannot access it yet before setting up a new TLB
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*/
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slwi r8,r5,6 /* spin table is padded to 64 byte */
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add r10,r3,r8
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mtspr SPRN_PIR,r4 /* write to PIR register */
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#ifdef CONFIG_SYS_CACHE_STASHING
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/* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
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slwi r8,r4,1
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addi r8,r8,32
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mtspr L1CSR2,r8
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#endif
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#if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) || \
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defined(CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011)
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/*
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* CPU22 applies to P4080 rev 1.0, 2.0, fixed in 3.0
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* NMG_CPU_A011 applies to P4080 rev 1.0, 2.0, fixed in 3.0
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* also appleis to P3041 rev 1.0, 1.1, P2041 rev 1.0, 1.1
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*/
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mfspr r3,SPRN_SVR
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rlwinm r6,r3,24,~0x800 /* clear E bit */
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lis r5,SVR_P4080@h
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ori r5,r5,SVR_P4080@l
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cmpw r6,r5
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bne 1f
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rlwinm r3,r3,0,0xf0
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li r5,0x30
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cmpw r3,r5
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bge 2f
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1:
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#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011
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lis r3,toreset(enable_cpu_a011_workaround)@ha
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lwz r3,toreset(enable_cpu_a011_workaround)@l(r3)
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cmpwi r3,0
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beq 2f
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#endif
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mfspr r3,L1CSR2
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oris r3,r3,(L1CSR2_DCWS)@h
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mtspr L1CSR2,r3
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2:
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#endif
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#ifdef CONFIG_SYS_FSL_ERRATUM_A005812
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/*
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* A-005812 workaround sets bit 32 of SPR 976 for SoCs running in
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* write shadow mode. This code should run after other code setting
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* DCWS.
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*/
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mfspr r3,L1CSR2
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andis. r3,r3,(L1CSR2_DCWS)@h
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beq 1f
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mfspr r3, SPRN_HDBCR0
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oris r3, r3, 0x8000
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mtspr SPRN_HDBCR0, r3
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1:
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#endif
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#ifdef CONFIG_BACKSIDE_L2_CACHE
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/* skip L2 setup on P2040/P2040E as they have no L2 */
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mfspr r3,SPRN_SVR
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rlwinm r6,r3,24,~0x800 /* clear E bit of SVR */
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lis r3,SVR_P2040@h
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ori r3,r3,SVR_P2040@l
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cmpw r6,r3
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beq 3f
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/* Enable/invalidate the L2 cache */
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msync
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lis r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@h
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ori r2,r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@l
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mtspr SPRN_L2CSR0,r2
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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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#ifdef CONFIG_SYS_CACHE_STASHING
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/* set stash id to (coreID) * 2 + 32 + L2 (1) */
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addi r3,r8,1
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mtspr SPRN_L2CSR1,r3
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#endif
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lis r3,CONFIG_SYS_INIT_L2CSR0@h
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ori r3,r3,CONFIG_SYS_INIT_L2CSR0@l
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mtspr SPRN_L2CSR0,r3
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isync
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2:
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mfspr r3,SPRN_L2CSR0
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andis. r1,r3,L2CSR0_L2E@h
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beq 2b
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#endif
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3:
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/* setup mapping for the spin table, WIMGE=0b00100 */
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lis r13,toreset(__spin_table_addr)@h
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ori r13,r13,toreset(__spin_table_addr)@l
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lwz r13,0(r13)
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/* mask by 4K */
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rlwinm r13,r13,0,0,19
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lis r11,(MAS0_TLBSEL(1)|MAS0_ESEL(1))@h
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mtspr SPRN_MAS0,r11
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lis r11,(MAS1_VALID|MAS1_IPROT)@h
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ori r11,r11,(MAS1_TS|MAS1_TSIZE(BOOKE_PAGESZ_4K))@l
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mtspr SPRN_MAS1,r11
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oris r11,r13,(MAS2_M|MAS2_G)@h
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ori r11,r13,(MAS2_M|MAS2_G)@l
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mtspr SPRN_MAS2,r11
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oris r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@h
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ori r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@l
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mtspr SPRN_MAS3,r11
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li r11,0
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mtspr SPRN_MAS7,r11
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tlbwe
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/*
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* __bootpg_addr has the address of __second_half_boot_page
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* jump there in AS=1 space with cache enabled
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*/
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lis r13,toreset(__bootpg_addr)@h
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ori r13,r13,toreset(__bootpg_addr)@l
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lwz r11,0(r13)
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mtspr SPRN_SRR0,r11
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mfmsr r13
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ori r12,r13,MSR_IS|MSR_DS@l
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mtspr SPRN_SRR1,r12
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rfi
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/*
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* Allocate some space for the SDRAM address of the bootpg.
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* This variable has to be in the boot page so that it can
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* be accessed by secondary cores when they come out of reset.
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*/
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.align L1_CACHE_SHIFT
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.globl __bootpg_addr
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__bootpg_addr:
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.long 0
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.global __spin_table_addr
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__spin_table_addr:
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.long 0
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/*
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* This variable is set by cpu_init_r() after parsing hwconfig
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* to enable workaround for erratum NMG_CPU_A011.
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*/
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.align L1_CACHE_SHIFT
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.global enable_cpu_a011_workaround
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enable_cpu_a011_workaround:
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.long 1
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/* Fill in the empty space. The actual reset vector is
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* the last word of the page */
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__secondary_start_code_end:
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.space 4092 - (__secondary_start_code_end - __secondary_start_page)
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__secondary_reset_vector:
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b __secondary_start_page
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/* this is a separated page for the spin table and cacheable boot code */
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.align L1_CACHE_SHIFT
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.global __second_half_boot_page
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__second_half_boot_page:
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#ifdef CONFIG_PPC_SPINTABLE_COMPATIBLE
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lis r3,(spin_table_compat - __second_half_boot_page)@h
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ori r3,r3,(spin_table_compat - __second_half_boot_page)@l
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add r3,r3,r11 /* r11 has the address of __second_half_boot_page */
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lwz r14,0(r3)
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#endif
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#define ENTRY_ADDR_UPPER 0
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#define ENTRY_ADDR_LOWER 4
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#define ENTRY_R3_UPPER 8
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#define ENTRY_R3_LOWER 12
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#define ENTRY_RESV 16
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#define ENTRY_PIR 20
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#define ENTRY_SIZE 64
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/*
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* setup the entry
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* r10 has the base address of the spin table.
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* spin table is defined as
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* struct {
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* uint64_t entry_addr;
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* uint64_t r3;
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* uint32_t rsvd1;
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* uint32_t pir;
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* };
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* we pad this struct to 64 bytes so each entry is in its own cacheline
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*/
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li r3,0
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li r8,1
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mfspr r4,SPRN_PIR
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stw r3,ENTRY_ADDR_UPPER(r10)
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stw r3,ENTRY_R3_UPPER(r10)
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stw r4,ENTRY_R3_LOWER(r10)
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stw r3,ENTRY_RESV(r10)
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stw r4,ENTRY_PIR(r10)
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msync
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stw r8,ENTRY_ADDR_LOWER(r10)
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/* spin waiting for addr */
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3:
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/*
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* To comply with ePAPR 1.1, the spin table has been moved to cache-enabled
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* memory. Old OS may not work with this change. A patch is waiting to be
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* accepted for Linux kernel. Other OS needs similar fix to spin table.
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* For OSes with old spin table code, we can enable this temporary fix by
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* setting environmental variable "spin_table_compat". For new OSes, set
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* "spin_table_compat=no". After Linux is fixed, we can remove this macro
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* and related code. For now, it is enabled by default.
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*/
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#ifdef CONFIG_PPC_SPINTABLE_COMPATIBLE
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cmpwi r14,0
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beq 4f
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dcbf 0, r10
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sync
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4:
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#endif
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lwz r4,ENTRY_ADDR_LOWER(r10)
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andi. r11,r4,1
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bne 3b
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isync
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/* setup IVORs to match fixed offsets */
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#include "fixed_ivor.S"
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/* get the upper bits of the addr */
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lwz r11,ENTRY_ADDR_UPPER(r10)
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/* setup branch addr */
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mtspr SPRN_SRR0,r4
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/* mark the entry as released */
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li r8,3
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stw r8,ENTRY_ADDR_LOWER(r10)
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/* mask by ~64M to setup our tlb we will jump to */
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rlwinm r12,r4,0,0,5
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/*
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* setup r3, r4, r5, r6, r7, r8, r9
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* r3 contains the value to put in the r3 register at secondary cpu
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* entry. The high 32-bits are ignored on 32-bit chip implementations.
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* 64-bit chip implementations however shall load all 64-bits
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*/
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#ifdef CONFIG_SYS_PPC64
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ld r3,ENTRY_R3_UPPER(r10)
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#else
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lwz r3,ENTRY_R3_LOWER(r10)
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#endif
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li r4,0
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li r5,0
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li r6,0
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lis r7,(64*1024*1024)@h
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li r8,0
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li r9,0
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/* load up the pir */
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lwz r0,ENTRY_PIR(r10)
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mtspr SPRN_PIR,r0
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mfspr r0,SPRN_PIR
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stw r0,ENTRY_PIR(r10)
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mtspr IVPR,r12
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/*
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* Coming here, we know the cpu has one TLB mapping in TLB1[0]
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* which maps 0xfffff000-0xffffffff one-to-one. We set up a
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* second mapping that maps addr 1:1 for 64M, and then we jump to
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* addr
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*/
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lis r10,(MAS0_TLBSEL(1)|MAS0_ESEL(0))@h
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mtspr SPRN_MAS0,r10
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lis r10,(MAS1_VALID|MAS1_IPROT)@h
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ori r10,r10,(MAS1_TSIZE(BOOKE_PAGESZ_64M))@l
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mtspr SPRN_MAS1,r10
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/* WIMGE = 0b00000 for now */
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mtspr SPRN_MAS2,r12
|
|
ori r12,r12,(MAS3_SX|MAS3_SW|MAS3_SR)
|
|
mtspr SPRN_MAS3,r12
|
|
#ifdef CONFIG_ENABLE_36BIT_PHYS
|
|
mtspr SPRN_MAS7,r11
|
|
#endif
|
|
tlbwe
|
|
|
|
/* Now we have another mapping for this page, so we jump to that
|
|
* mapping
|
|
*/
|
|
mtspr SPRN_SRR1,r13
|
|
rfi
|
|
|
|
|
|
.align 6
|
|
.globl __spin_table
|
|
__spin_table:
|
|
.space CONFIG_MAX_CPUS*ENTRY_SIZE
|
|
|
|
#ifdef CONFIG_PPC_SPINTABLE_COMPATIBLE
|
|
.align L1_CACHE_SHIFT
|
|
.global spin_table_compat
|
|
spin_table_compat:
|
|
.long 1
|
|
|
|
#endif
|
|
|
|
__spin_table_end:
|
|
.space 4096 - (__spin_table_end - __spin_table)
|