/* * This file contains low level CPU setup functions. * Kumar Gala * Copyright 2009 Freescale Semiconductor, Inc. * * Based on cpu_setup_6xx code by * Benjamin Herrenschmidt * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * */ #include #include #include #include #include _GLOBAL(__e500_icache_setup) mfspr r0, SPRN_L1CSR1 andi. r3, r0, L1CSR1_ICE bnelr /* Already enabled */ oris r0, r0, L1CSR1_CPE@h ori r0, r0, (L1CSR1_ICFI | L1CSR1_ICLFR | L1CSR1_ICE) mtspr SPRN_L1CSR1, r0 /* Enable I-Cache */ isync blr _GLOBAL(__e500_dcache_setup) mfspr r0, SPRN_L1CSR0 andi. r3, r0, L1CSR0_DCE bnelr /* Already enabled */ msync isync li r0, 0 mtspr SPRN_L1CSR0, r0 /* Disable */ msync isync li r0, (L1CSR0_DCFI | L1CSR0_CLFC) mtspr SPRN_L1CSR0, r0 /* Invalidate */ isync 1: mfspr r0, SPRN_L1CSR0 andi. r3, r0, L1CSR0_CLFC bne+ 1b /* Wait for lock bits reset */ oris r0, r0, L1CSR0_CPE@h ori r0, r0, L1CSR0_DCE msync isync mtspr SPRN_L1CSR0, r0 /* Enable */ isync blr _GLOBAL(has_pw20_altivec_idle) /* 0 false, 1 true */ li r3, 0 /* PW20 & AltiVec idle feature only exists for E6500 */ mfspr r0, SPRN_PVR rlwinm r11, r0, 16, 16, 31 lis r12, 0 ori r12, r12, PVR_VER_E6500@l cmpw r11, r12 bne 2f /* Fix erratum, e6500 rev1 does not support PW20 & AltiVec idle */ rlwinm r11, r0, 0, 16, 31 cmpwi r11, 0x20 blt 2f li r3, 1 2: blr /* * FIXME - we haven't yet done testing to determine a reasonable default * value for PW20_WAIT_IDLE_BIT. */ #define PW20_WAIT_IDLE_BIT 50 /* 1ms, TB frequency is 41.66MHZ */ _GLOBAL(setup_pw20_idle) mflr r10 bl has_pw20_altivec_idle mtlr r10 cmpwi r3, 0 beq 2f mfspr r3, SPRN_PWRMGTCR0 /* Set PW20_WAIT bit, enable pw20 state*/ ori r3, r3, PWRMGTCR0_PW20_WAIT li r11, PW20_WAIT_IDLE_BIT /* Set Automatic PW20 Core Idle Count */ rlwimi r3, r11, PWRMGTCR0_PW20_ENT_SHIFT, PWRMGTCR0_PW20_ENT mtspr SPRN_PWRMGTCR0, r3 2: blr /* * FIXME - we haven't yet done testing to determine a reasonable default * value for AV_WAIT_IDLE_BIT. */ #define AV_WAIT_IDLE_BIT 50 /* 1ms, TB frequency is 41.66MHZ */ _GLOBAL(setup_altivec_idle) mflr r10 bl has_pw20_altivec_idle mtlr r10 cmpwi r3, 0 beq 2f mfspr r3, SPRN_PWRMGTCR0 /* Enable Altivec Idle */ oris r3, r3, PWRMGTCR0_AV_IDLE_PD_EN@h li r11, AV_WAIT_IDLE_BIT /* Set Automatic AltiVec Idle Count */ rlwimi r3, r11, PWRMGTCR0_AV_IDLE_CNT_SHIFT, PWRMGTCR0_AV_IDLE_CNT mtspr SPRN_PWRMGTCR0, r3 2: blr #ifdef CONFIG_PPC_BOOK3E_64 _GLOBAL(__setup_cpu_e6500) mflr r6 #ifdef CONFIG_PPC64 bl .setup_altivec_ivors /* Touch IVOR42 only if the CPU supports E.HV category */ mfspr r10,SPRN_MMUCFG rlwinm. r10,r10,0,MMUCFG_LPIDSIZE beq 1f bl .setup_lrat_ivor 1: #endif bl .setup_pw20_idle bl .setup_altivec_idle bl __setup_cpu_e5500 mtlr r6 blr #endif #ifdef CONFIG_PPC32 _GLOBAL(__setup_cpu_e200) /* enable dedicated debug exception handling resources (Debug APU) */ mfspr r3,SPRN_HID0 ori r3,r3,HID0_DAPUEN@l mtspr SPRN_HID0,r3 b __setup_e200_ivors _GLOBAL(__setup_cpu_e500v1) _GLOBAL(__setup_cpu_e500v2) mflr r4 bl __e500_icache_setup bl __e500_dcache_setup bl __setup_e500_ivors #if defined(CONFIG_FSL_RIO) || defined(CONFIG_FSL_PCI) /* Ensure that RFXE is set */ mfspr r3,SPRN_HID1 oris r3,r3,HID1_RFXE@h mtspr SPRN_HID1,r3 #endif mtlr r4 blr _GLOBAL(__setup_cpu_e500mc) _GLOBAL(__setup_cpu_e5500) mflr r5 bl __e500_icache_setup bl __e500_dcache_setup bl __setup_e500mc_ivors /* * We only want to touch IVOR38-41 if we're running on hardware * that supports category E.HV. The architectural way to determine * this is MMUCFG[LPIDSIZE]. */ mfspr r3, SPRN_MMUCFG rlwinm. r3, r3, 0, MMUCFG_LPIDSIZE beq 1f bl __setup_ehv_ivors b 2f 1: lwz r3, CPU_SPEC_FEATURES(r4) /* We need this check as cpu_setup is also called for * the secondary cores. So, if we have already cleared * the feature on the primary core, avoid doing it on the * secondary core. */ andis. r6, r3, CPU_FTR_EMB_HV@h beq 2f rlwinm r3, r3, 0, ~CPU_FTR_EMB_HV stw r3, CPU_SPEC_FEATURES(r4) 2: mtlr r5 blr #endif #ifdef CONFIG_PPC_BOOK3E_64 _GLOBAL(__restore_cpu_e6500) mflr r5 bl .setup_altivec_ivors bl .setup_pw20_idle bl .setup_altivec_idle /* Touch IVOR42 only if the CPU supports E.HV category */ mfspr r10,SPRN_MMUCFG rlwinm. r10,r10,0,MMUCFG_LPIDSIZE beq 1f bl .setup_lrat_ivor 1: bl __restore_cpu_e5500 mtlr r5 blr _GLOBAL(__restore_cpu_e5500) mflr r4 bl __e500_icache_setup bl __e500_dcache_setup bl .__setup_base_ivors bl .setup_perfmon_ivor bl .setup_doorbell_ivors /* * We only want to touch IVOR38-41 if we're running on hardware * that supports category E.HV. The architectural way to determine * this is MMUCFG[LPIDSIZE]. */ mfspr r10,SPRN_MMUCFG rlwinm. r10,r10,0,MMUCFG_LPIDSIZE beq 1f bl .setup_ehv_ivors 1: mtlr r4 blr _GLOBAL(__setup_cpu_e5500) mflr r5 bl __e500_icache_setup bl __e500_dcache_setup bl .__setup_base_ivors bl .setup_perfmon_ivor bl .setup_doorbell_ivors /* * We only want to touch IVOR38-41 if we're running on hardware * that supports category E.HV. The architectural way to determine * this is MMUCFG[LPIDSIZE]. */ mfspr r10,SPRN_MMUCFG rlwinm. r10,r10,0,MMUCFG_LPIDSIZE beq 1f bl .setup_ehv_ivors b 2f 1: ld r10,CPU_SPEC_FEATURES(r4) LOAD_REG_IMMEDIATE(r9,CPU_FTR_EMB_HV) andc r10,r10,r9 std r10,CPU_SPEC_FEATURES(r4) 2: mtlr r5 blr #endif