/* $NetBSD: cpufunc.c,v 1.65 2003/11/05 12:53:15 scw Exp $ */ /*- * SPDX-License-Identifier: BSD-4-Clause * * arm9 support code Copyright (C) 2001 ARM Ltd * Copyright (c) 1997 Mark Brinicombe. * Copyright (c) 1997 Causality Limited * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Causality Limited. * 4. The name of Causality Limited may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY CAUSALITY LIMITED ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL CAUSALITY LIMITED BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * RiscBSD kernel project * * cpufuncs.c * * C functions for supporting CPU / MMU / TLB specific operations. * * Created : 30/01/97 */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include /* PRIMARY CACHE VARIABLES */ int arm_dcache_align; int arm_dcache_align_mask; #ifdef CPU_MV_PJ4B static void pj4bv7_setup(void); #endif #if defined(CPU_ARM1176) static void arm11x6_setup(void); #endif #if defined(CPU_CORTEXA) || defined(CPU_KRAIT) static void cortexa_setup(void); #endif #ifdef CPU_MV_PJ4B struct cpu_functions pj4bv7_cpufuncs = { /* Cache operations */ .cf_l2cache_wbinv_all = (void *)cpufunc_nullop, .cf_l2cache_wbinv_range = (void *)cpufunc_nullop, .cf_l2cache_inv_range = (void *)cpufunc_nullop, .cf_l2cache_wb_range = (void *)cpufunc_nullop, .cf_l2cache_drain_writebuf = (void *)cpufunc_nullop, /* Other functions */ .cf_sleep = (void *)cpufunc_nullop, /* Soft functions */ .cf_setup = pj4bv7_setup }; #endif /* CPU_MV_PJ4B */ #if defined(CPU_ARM1176) struct cpu_functions arm1176_cpufuncs = { /* Cache operations */ .cf_l2cache_wbinv_all = (void *)cpufunc_nullop, .cf_l2cache_wbinv_range = (void *)cpufunc_nullop, .cf_l2cache_inv_range = (void *)cpufunc_nullop, .cf_l2cache_wb_range = (void *)cpufunc_nullop, .cf_l2cache_drain_writebuf = (void *)cpufunc_nullop, /* Other functions */ .cf_sleep = arm11x6_sleep, /* Soft functions */ .cf_setup = arm11x6_setup }; #endif /*CPU_ARM1176 */ #if defined(CPU_CORTEXA) || defined(CPU_KRAIT) struct cpu_functions cortexa_cpufuncs = { /* Cache operations */ /* * Note: For CPUs using the PL310 the L2 ops are filled in when the * L2 cache controller is actually enabled. */ .cf_l2cache_wbinv_all = cpufunc_nullop, .cf_l2cache_wbinv_range = (void *)cpufunc_nullop, .cf_l2cache_inv_range = (void *)cpufunc_nullop, .cf_l2cache_wb_range = (void *)cpufunc_nullop, .cf_l2cache_drain_writebuf = (void *)cpufunc_nullop, /* Other functions */ .cf_sleep = armv7_cpu_sleep, /* Soft functions */ .cf_setup = cortexa_setup }; #endif /* CPU_CORTEXA || CPU_KRAIT */ /* * Global constants also used by locore.s */ struct cpu_functions cpufuncs; u_int cputype; static void get_cachetype_cp15(void); static void get_cachetype_cp15(void) { u_int ctype, dsize, cpuid; u_int clevel, csize, i, sel; u_int multiplier; u_char type; ctype = cp15_ctr_get(); cpuid = cp15_midr_get(); /* * ...and thus spake the ARM ARM: * * If an value corresponding to an unimplemented or * reserved ID register is encountered, the System Control * processor returns the value of the main ID register. */ if (ctype == cpuid) goto out; if (CPU_CT_FORMAT(ctype) == CPU_CT_ARMV7) { __asm __volatile("mrc p15, 1, %0, c0, c0, 1" : "=r" (clevel)); i = 0; while ((type = (clevel & 0x7)) && i < 7) { if (type == CACHE_DCACHE || type == CACHE_UNI_CACHE || type == CACHE_SEP_CACHE) { sel = i << 1; __asm __volatile("mcr p15, 2, %0, c0, c0, 0" : : "r" (sel)); __asm __volatile("mrc p15, 1, %0, c0, c0, 0" : "=r" (csize)); arm_dcache_align = 1 << (CPUV7_CT_xSIZE_LEN(csize) + 4); arm_dcache_align_mask = arm_dcache_align - 1; } if (type == CACHE_ICACHE || type == CACHE_SEP_CACHE) { sel = (i << 1) | 1; __asm __volatile("mcr p15, 2, %0, c0, c0, 0" : : "r" (sel)); __asm __volatile("mrc p15, 1, %0, c0, c0, 0" : "=r" (csize)); } i++; clevel >>= 3; } } else { /* * If you want to know how this code works, go read the ARM ARM. */ dsize = CPU_CT_DSIZE(ctype); multiplier = (dsize & CPU_CT_xSIZE_M) ? 3 : 2; arm_dcache_align = 1U << (CPU_CT_xSIZE_LEN(dsize) + 3); if (CPU_CT_xSIZE_ASSOC(dsize) == 0) { if (dsize & CPU_CT_xSIZE_M) arm_dcache_align = 0; /* not present */ } out: arm_dcache_align_mask = arm_dcache_align - 1; } } /* * Cannot panic here as we may not have a console yet ... */ int set_cpufuncs(void) { cputype = cp15_midr_get(); cputype &= CPU_ID_CPU_MASK; #if defined(CPU_ARM1176) if (cputype == CPU_ID_ARM1176JZS) { cpufuncs = arm1176_cpufuncs; get_cachetype_cp15(); goto out; } #endif /* CPU_ARM1176 */ #if defined(CPU_CORTEXA) || defined(CPU_KRAIT) switch(cputype & CPU_ID_SCHEME_MASK) { case CPU_ID_CORTEXA5: case CPU_ID_CORTEXA7: case CPU_ID_CORTEXA8: case CPU_ID_CORTEXA9: case CPU_ID_CORTEXA12: case CPU_ID_CORTEXA15: case CPU_ID_CORTEXA53: case CPU_ID_CORTEXA57: case CPU_ID_CORTEXA72: case CPU_ID_KRAIT300: cpufuncs = cortexa_cpufuncs; get_cachetype_cp15(); goto out; default: break; } #endif /* CPU_CORTEXA || CPU_KRAIT */ #if defined(CPU_MV_PJ4B) if (cputype == CPU_ID_MV88SV581X_V7 || cputype == CPU_ID_MV88SV584X_V7 || cputype == CPU_ID_ARM_88SV581X_V7) { cpufuncs = pj4bv7_cpufuncs; get_cachetype_cp15(); goto out; } #endif /* CPU_MV_PJ4B */ /* * Bzzzz. And the answer was ... */ panic("No support for this CPU type (%08x) in kernel", cputype); return(ARCHITECTURE_NOT_PRESENT); out: uma_set_align(arm_dcache_align_mask); return (0); } /* * CPU Setup code */ #if defined(CPU_ARM1176) \ || defined(CPU_MV_PJ4B) \ || defined(CPU_CORTEXA) || defined(CPU_KRAIT) static __inline void cpu_scc_setup_ccnt(void) { /* This is how you give userland access to the CCNT and PMCn * registers. * BEWARE! This gives write access also, which may not be what * you want! */ #ifdef _PMC_USER_READ_WRITE_ /* Set PMUSERENR[0] to allow userland access */ cp15_pmuserenr_set(1); #endif #if defined(CPU_ARM1176) /* Set PMCR[2,0] to enable counters and reset CCNT */ cp15_pmcr_set(5); #else /* Set up the PMCCNTR register as a cyclecounter: * Set PMINTENCLR to 0xFFFFFFFF to block interrupts * Set PMCR[2,0] to enable counters and reset CCNT * Set PMCNTENSET to 0x80000000 to enable CCNT */ cp15_pminten_clr(0xFFFFFFFF); cp15_pmcr_set(5); cp15_pmcnten_set(0x80000000); #endif } #endif #if defined(CPU_ARM1176) static void arm11x6_setup(void) { uint32_t auxctrl, auxctrl_wax; uint32_t tmp, tmp2; uint32_t cpuid; cpuid = cp15_midr_get(); auxctrl = 0; auxctrl_wax = ~0; /* * Enable an errata workaround */ if ((cpuid & CPU_ID_CPU_MASK) == CPU_ID_ARM1176JZS) { /* ARM1176JZSr0 */ auxctrl = ARM1176_AUXCTL_PHD; auxctrl_wax = ~ARM1176_AUXCTL_PHD; } tmp = cp15_actlr_get(); tmp2 = tmp; tmp &= auxctrl_wax; tmp |= auxctrl; if (tmp != tmp2) cp15_actlr_set(tmp); cpu_scc_setup_ccnt(); } #endif /* CPU_ARM1176 */ #ifdef CPU_MV_PJ4B static void pj4bv7_setup(void) { pj4b_config(); cpu_scc_setup_ccnt(); } #endif /* CPU_MV_PJ4B */ #if defined(CPU_CORTEXA) || defined(CPU_KRAIT) static void cortexa_setup(void) { cpu_scc_setup_ccnt(); } #endif /* CPU_CORTEXA || CPU_KRAIT */