/* * Copyright 2008-2012 Freescale Semiconductor, Inc. * Kumar Gala * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include #include #include /* To boot secondary cpus, we need a place for them to start up. * Normally, they start at 0xfffffffc, but that's usually the * firmware, and we don't want to have to run the firmware again. * Instead, the primary cpu will set the BPTR to point here to * this page. We then set up the core, and head to * start_secondary. Note that this means that the code below * must never exceed 1023 instructions (the branch at the end * would then be the 1024th). */ .globl __secondary_start_page .align 12 __secondary_start_page: /* First do some preliminary setup */ lis r3, HID0_EMCP@h /* enable machine check */ #ifndef CONFIG_E500MC ori r3,r3,HID0_TBEN@l /* enable Timebase */ #endif #ifdef CONFIG_PHYS_64BIT ori r3,r3,HID0_ENMAS7@l /* enable MAS7 updates */ #endif mtspr SPRN_HID0,r3 #ifndef CONFIG_E500MC li r3,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */ mfspr r0,PVR andi. r0,r0,0xff cmpwi r0,0x50@l /* if we are rev 5.0 or greater set MBDD */ blt 1f /* Set MBDD bit also */ ori r3, r3, HID1_MBDD@l 1: mtspr SPRN_HID1,r3 #endif #ifdef CONFIG_SYS_FSL_ERRATUM_CPU_A003999 mfspr r3,SPRN_HDBCR1 oris r3,r3,0x0100 mtspr SPRN_HDBCR1,r3 #endif #ifdef CONFIG_SYS_FSL_ERRATUM_A004510 mfspr r3,SPRN_SVR rlwinm r3,r3,0,0xff li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV cmpw r3,r4 beq 1f #ifdef CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 cmpw r3,r4 beq 1f #endif /* Not a supported revision affected by erratum */ b 2f 1: /* Erratum says set bits 55:60 to 001001 */ msync isync mfspr r3,SPRN_HDBCR0 li r4,0x48 rlwimi r3,r4,0,0x1f8 mtspr SPRN_HDBCR0,r3 isync 2: #endif /* Enable branch prediction */ lis r3,BUCSR_ENABLE@h ori r3,r3,BUCSR_ENABLE@l mtspr SPRN_BUCSR,r3 /* Ensure TB is 0 */ li r3,0 mttbl r3 mttbu r3 /* 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 #define toreset(x) (x - __secondary_start_page + 0xfffff000) /* get our PIR to figure out our table entry */ lis r3,toreset(__spin_table_addr)@h ori r3,r3,toreset(__spin_table_addr)@l lwz r3,0(r3) mfspr r0,SPRN_PIR #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2 /* * PIR definition for Chassis 2 * 0-17 Reserved (logic 0s) * 18-19 CHIP_ID, 2'b00 - SoC 1 * all others - reserved * 20-24 CLUSTER_ID 5'b00000 - CCM 1 * all others - reserved * 25-26 CORE_CLUSTER_ID 2'b00 - cluster 1 * 2'b01 - cluster 2 * 2'b10 - cluster 3 * 2'b11 - cluster 4 * 27-28 CORE_ID 2'b00 - core 0 * 2'b01 - core 1 * 2'b10 - core 2 * 2'b11 - core 3 * 29-31 THREAD_ID 3'b000 - thread 0 * 3'b001 - thread 1 * * Power-on PIR increments threads by 0x01, cores within a cluster by 0x08 * and clusters by 0x20. * * We renumber PIR so that all threads in the system are consecutive. */ rlwinm r8,r0,29,0x03 /* r8 = core within cluster */ srwi r10,r0,5 /* r10 = cluster */ mulli r5,r10,CONFIG_SYS_FSL_CORES_PER_CLUSTER add r5,r5,r8 /* for spin table index */ mulli r4,r5,CONFIG_SYS_FSL_THREADS_PER_CORE /* for PIR */ #elif defined(CONFIG_E500MC) rlwinm r4,r0,27,27,31 mr r5,r4 #else mr r4,r0 mr r5,r4 #endif /* * r10 has the base address for the entry. * we cannot access it yet before setting up a new TLB */ slwi r8,r5,6 /* spin table is padded to 64 byte */ add r10,r3,r8 mtspr SPRN_PIR,r4 /* write to PIR register */ #ifdef CONFIG_SYS_CACHE_STASHING /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */ slwi r8,r4,1 addi r8,r8,32 mtspr L1CSR2,r8 #endif #if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) || \ defined(CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011) /* * CPU22 applies to P4080 rev 1.0, 2.0, fixed in 3.0 * NMG_CPU_A011 applies to P4080 rev 1.0, 2.0, fixed in 3.0 * also appleis to P3041 rev 1.0, 1.1, P2041 rev 1.0, 1.1 */ mfspr r3,SPRN_SVR rlwinm r6,r3,24,~0x800 /* clear E bit */ lis r5,SVR_P4080@h ori r5,r5,SVR_P4080@l cmpw r6,r5 bne 1f rlwinm r3,r3,0,0xf0 li r5,0x30 cmpw r3,r5 bge 2f 1: #ifdef CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011 lis r3,toreset(enable_cpu_a011_workaround)@ha lwz r3,toreset(enable_cpu_a011_workaround)@l(r3) cmpwi r3,0 beq 2f #endif mfspr r3,L1CSR2 oris r3,r3,(L1CSR2_DCWS)@h mtspr L1CSR2,r3 2: #endif #ifdef CONFIG_SYS_FSL_ERRATUM_A005812 /* * A-005812 workaround sets bit 32 of SPR 976 for SoCs running in * write shadow mode. This code should run after other code setting * DCWS. */ mfspr r3,L1CSR2 andis. r3,r3,(L1CSR2_DCWS)@h beq 1f mfspr r3, SPRN_HDBCR0 oris r3, r3, 0x8000 mtspr SPRN_HDBCR0, r3 1: #endif #ifdef CONFIG_BACKSIDE_L2_CACHE /* skip L2 setup on P2040/P2040E as they have no L2 */ mfspr r3,SPRN_SVR rlwinm r6,r3,24,~0x800 /* clear E bit of SVR */ lis r3,SVR_P2040@h ori r3,r3,SVR_P2040@l cmpw r6,r3 beq 3f /* Enable/invalidate the L2 cache */ msync lis r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@h ori r2,r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@l mtspr SPRN_L2CSR0,r2 1: mfspr r3,SPRN_L2CSR0 and. r1,r3,r2 bne 1b #ifdef CONFIG_SYS_CACHE_STASHING /* set stash id to (coreID) * 2 + 32 + L2 (1) */ addi r3,r8,1 mtspr SPRN_L2CSR1,r3 #endif lis r3,CONFIG_SYS_INIT_L2CSR0@h ori r3,r3,CONFIG_SYS_INIT_L2CSR0@l mtspr SPRN_L2CSR0,r3 isync 2: mfspr r3,SPRN_L2CSR0 andis. r1,r3,L2CSR0_L2E@h beq 2b #endif 3: /* setup mapping for the spin table, WIMGE=0b00100 */ lis r13,toreset(__spin_table_addr)@h ori r13,r13,toreset(__spin_table_addr)@l lwz r13,0(r13) /* mask by 4K */ rlwinm r13,r13,0,0,19 lis r11,(MAS0_TLBSEL(1)|MAS0_ESEL(1))@h mtspr SPRN_MAS0,r11 lis r11,(MAS1_VALID|MAS1_IPROT)@h ori r11,r11,(MAS1_TS|MAS1_TSIZE(BOOKE_PAGESZ_4K))@l mtspr SPRN_MAS1,r11 oris r11,r13,(MAS2_M|MAS2_G)@h ori r11,r13,(MAS2_M|MAS2_G)@l mtspr SPRN_MAS2,r11 oris r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@h ori r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@l mtspr SPRN_MAS3,r11 li r11,0 mtspr SPRN_MAS7,r11 tlbwe /* * __bootpg_addr has the address of __second_half_boot_page * jump there in AS=1 space with cache enabled */ lis r13,toreset(__bootpg_addr)@h ori r13,r13,toreset(__bootpg_addr)@l lwz r11,0(r13) mtspr SPRN_SRR0,r11 mfmsr r13 ori r12,r13,MSR_IS|MSR_DS@l mtspr SPRN_SRR1,r12 rfi /* * Allocate some space for the SDRAM address of the bootpg. * This variable has to be in the boot page so that it can * be accessed by secondary cores when they come out of reset. */ .align L1_CACHE_SHIFT .globl __bootpg_addr __bootpg_addr: .long 0 .global __spin_table_addr __spin_table_addr: .long 0 /* * This variable is set by cpu_init_r() after parsing hwconfig * to enable workaround for erratum NMG_CPU_A011. */ .align L1_CACHE_SHIFT .global enable_cpu_a011_workaround enable_cpu_a011_workaround: .long 1 /* Fill in the empty space. The actual reset vector is * the last word of the page */ __secondary_start_code_end: .space 4092 - (__secondary_start_code_end - __secondary_start_page) __secondary_reset_vector: b __secondary_start_page /* this is a separated page for the spin table and cacheable boot code */ .align L1_CACHE_SHIFT .global __second_half_boot_page __second_half_boot_page: #ifdef CONFIG_PPC_SPINTABLE_COMPATIBLE lis r3,(spin_table_compat - __second_half_boot_page)@h ori r3,r3,(spin_table_compat - __second_half_boot_page)@l add r3,r3,r11 /* r11 has the address of __second_half_boot_page */ lwz r14,0(r3) #endif #define ENTRY_ADDR_UPPER 0 #define ENTRY_ADDR_LOWER 4 #define ENTRY_R3_UPPER 8 #define ENTRY_R3_LOWER 12 #define ENTRY_RESV 16 #define ENTRY_PIR 20 #define ENTRY_SIZE 64 /* * setup the entry * r10 has the base address of the spin table. * spin table is defined as * struct { * uint64_t entry_addr; * uint64_t r3; * uint32_t rsvd1; * uint32_t pir; * }; * we pad this struct to 64 bytes so each entry is in its own cacheline */ li r3,0 li r8,1 mfspr r4,SPRN_PIR stw r3,ENTRY_ADDR_UPPER(r10) stw r3,ENTRY_R3_UPPER(r10) stw r4,ENTRY_R3_LOWER(r10) stw r3,ENTRY_RESV(r10) stw r4,ENTRY_PIR(r10) msync stw r8,ENTRY_ADDR_LOWER(r10) /* spin waiting for addr */ 3: /* * To comply with ePAPR 1.1, the spin table has been moved to cache-enabled * memory. Old OS may not work with this change. A patch is waiting to be * accepted for Linux kernel. Other OS needs similar fix to spin table. * For OSes with old spin table code, we can enable this temporary fix by * setting environmental variable "spin_table_compat". For new OSes, set * "spin_table_compat=no". After Linux is fixed, we can remove this macro * and related code. For now, it is enabled by default. */ #ifdef CONFIG_PPC_SPINTABLE_COMPATIBLE cmpwi r14,0 beq 4f dcbf 0, r10 sync 4: #endif lwz r4,ENTRY_ADDR_LOWER(r10) andi. r11,r4,1 bne 3b isync /* get the upper bits of the addr */ lwz r11,ENTRY_ADDR_UPPER(r10) /* setup branch addr */ mtspr SPRN_SRR0,r4 /* mark the entry as released */ li r8,3 stw r8,ENTRY_ADDR_LOWER(r10) /* mask by ~64M to setup our tlb we will jump to */ rlwinm r12,r4,0,0,5 /* * setup r3, r4, r5, r6, r7, r8, r9 * r3 contains the value to put in the r3 register at secondary cpu * entry. The high 32-bits are ignored on 32-bit chip implementations. * 64-bit chip implementations however shall load all 64-bits */ #ifdef CONFIG_SYS_PPC64 ld r3,ENTRY_R3_UPPER(r10) #else lwz r3,ENTRY_R3_LOWER(r10) #endif li r4,0 li r5,0 li r6,0 lis r7,(64*1024*1024)@h li r8,0 li r9,0 /* load up the pir */ lwz r0,ENTRY_PIR(r10) mtspr SPRN_PIR,r0 mfspr r0,SPRN_PIR stw r0,ENTRY_PIR(r10) mtspr IVPR,r12 /* * Coming here, we know the cpu has one TLB mapping in TLB1[0] * which maps 0xfffff000-0xffffffff one-to-one. We set up a * second mapping that maps addr 1:1 for 64M, and then we jump to * addr */ lis r10,(MAS0_TLBSEL(1)|MAS0_ESEL(0))@h mtspr SPRN_MAS0,r10 lis r10,(MAS1_VALID|MAS1_IPROT)@h ori r10,r10,(MAS1_TSIZE(BOOKE_PAGESZ_64M))@l mtspr SPRN_MAS1,r10 /* WIMGE = 0b00000 for now */ 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)