/* * MIPS emulation for qemu: CPU initialisation routines. * * Copyright (c) 2004-2005 Jocelyn Mayer * Copyright (c) 2007 Herve Poussineau * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* CPU / CPU family specific config register values. */ /* Have config1, is MIPS32R1, uses TLB, no virtual icache, uncached coherency */ #define MIPS_CONFIG0 \ ((1 << CP0C0_M) | (0x0 << CP0C0_K23) | (0x0 << CP0C0_KU) | \ (0x0 << CP0C0_AT) | (0x0 << CP0C0_AR) | (0x1 << CP0C0_MT) | \ (0x2 << CP0C0_K0)) /* Have config2, no coprocessor2 attached, no MDMX support attached, no performance counters, watch registers present, no code compression, EJTAG present, no FPU */ #define MIPS_CONFIG1 \ ((1 << CP0C1_M) | \ (0 << CP0C1_C2) | (0 << CP0C1_MD) | (0 << CP0C1_PC) | \ (1 << CP0C1_WR) | (0 << CP0C1_CA) | (1 << CP0C1_EP) | \ (0 << CP0C1_FP)) /* Have config3, no tertiary/secondary caches implemented */ #define MIPS_CONFIG2 \ ((1 << CP0C2_M)) /* No config4, no DSP ASE, no large physaddr, no external interrupt controller, no vectored interupts, no 1kb pages, no MT ASE, no SmartMIPS ASE, no trace logic */ #define MIPS_CONFIG3 \ ((0 << CP0C3_M) | (0 << CP0C3_DSPP) | (0 << CP0C3_LPA) | \ (0 << CP0C3_VEIC) | (0 << CP0C3_VInt) | (0 << CP0C3_SP) | \ (0 << CP0C3_MT) | (0 << CP0C3_SM) | (0 << CP0C3_TL)) /* Define a implementation number of 1. Define a major version 1, minor version 0. */ #define MIPS_FCR0 ((0 << FCR0_S) | (0x1 << FCR0_PRID) | (0x10 << FCR0_REV)) struct mips_def_t { const unsigned char *name; int32_t CP0_PRid; int32_t CP0_Config0; int32_t CP0_Config1; int32_t CP0_Config2; int32_t CP0_Config3; int32_t CP0_Config6; int32_t CP0_Config7; int32_t SYNCI_Step; int32_t CCRes; int32_t Status_rw_bitmask; int32_t CP1_fcr0; int32_t SEGBITS; }; /*****************************************************************************/ /* MIPS CPU definitions */ static mips_def_t mips_defs[] = { { .name = "4Kc", .CP0_PRid = 0x00018000, .CP0_Config0 = MIPS_CONFIG0, .CP0_Config1 = MIPS_CONFIG1 | (15 << CP0C1_MMU) | (0 << CP0C1_IS) | (3 << CP0C1_IL) | (1 << CP0C1_IA) | (0 << CP0C1_DS) | (3 << CP0C1_DL) | (1 << CP0C1_DA), .CP0_Config2 = MIPS_CONFIG2, .CP0_Config3 = MIPS_CONFIG3, .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x3278FF17, }, { .name = "4KEcR1", .CP0_PRid = 0x00018400, .CP0_Config0 = MIPS_CONFIG0, .CP0_Config1 = MIPS_CONFIG1 | (15 << CP0C1_MMU) | (0 << CP0C1_IS) | (3 << CP0C1_IL) | (1 << CP0C1_IA) | (0 << CP0C1_DS) | (3 << CP0C1_DL) | (1 << CP0C1_DA), .CP0_Config2 = MIPS_CONFIG2, .CP0_Config3 = MIPS_CONFIG3, .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x3278FF17, }, { .name = "4KEc", .CP0_PRid = 0x00019000, .CP0_Config0 = MIPS_CONFIG0 | (0x1 << CP0C0_AR), .CP0_Config1 = MIPS_CONFIG1 | (15 << CP0C1_MMU) | (0 << CP0C1_IS) | (3 << CP0C1_IL) | (1 << CP0C1_IA) | (0 << CP0C1_DS) | (3 << CP0C1_DL) | (1 << CP0C1_DA), .CP0_Config2 = MIPS_CONFIG2, .CP0_Config3 = MIPS_CONFIG3, .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x3278FF17, }, { .name = "24Kc", .CP0_PRid = 0x00019300, .CP0_Config0 = MIPS_CONFIG0 | (0x1 << CP0C0_AR), .CP0_Config1 = MIPS_CONFIG1 | (15 << CP0C1_MMU) | (0 << CP0C1_IS) | (3 << CP0C1_IL) | (1 << CP0C1_IA) | (0 << CP0C1_DS) | (3 << CP0C1_DL) | (1 << CP0C1_DA), .CP0_Config2 = MIPS_CONFIG2, .CP0_Config3 = MIPS_CONFIG3, .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x3278FF17, }, { .name = "24Kf", .CP0_PRid = 0x00019300, .CP0_Config0 = MIPS_CONFIG0 | (0x1 << CP0C0_AR), .CP0_Config1 = MIPS_CONFIG1 | (1 << CP0C1_FP) | (15 << CP0C1_MMU) | (0 << CP0C1_IS) | (3 << CP0C1_IL) | (1 << CP0C1_IA) | (0 << CP0C1_DS) | (3 << CP0C1_DL) | (1 << CP0C1_DA), .CP0_Config2 = MIPS_CONFIG2, .CP0_Config3 = MIPS_CONFIG3, .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x3678FF17, .CP1_fcr0 = (1 << FCR0_F64) | (1 << FCR0_L) | (1 << FCR0_W) | (1 << FCR0_D) | (1 << FCR0_S) | (0x93 << FCR0_PRID), }, #ifdef TARGET_MIPS64 { .name = "R4000", .CP0_PRid = 0x00000400, .CP0_Config0 = MIPS_CONFIG0 | (0x2 << CP0C0_AT), .CP0_Config1 = MIPS_CONFIG1 | (1 << CP0C1_FP) | (47 << CP0C1_MMU) | (0 << CP0C1_IS) | (3 << CP0C1_IL) | (1 << CP0C1_IA) | (0 << CP0C1_DS) | (3 << CP0C1_DL) | (1 << CP0C1_DA), .CP0_Config2 = MIPS_CONFIG2, .CP0_Config3 = MIPS_CONFIG3, .SYNCI_Step = 16, .CCRes = 2, .Status_rw_bitmask = 0x3678FFFF, /* The R4000 has a full 64bit FPU doesn't use the fcr0 bits. */ .CP1_fcr0 = (0x5 << FCR0_PRID) | (0x0 << FCR0_REV), .SEGBITS = 40, }, { .name = "5Kc", .CP0_PRid = 0x00018100, .CP0_Config0 = MIPS_CONFIG0 | (0x2 << CP0C0_AT), .CP0_Config1 = MIPS_CONFIG1 | (31 << CP0C1_MMU) | (1 << CP0C1_IS) | (4 << CP0C1_IL) | (1 << CP0C1_IA) | (1 << CP0C1_DS) | (4 << CP0C1_DL) | (1 << CP0C1_DA) | (1 << CP0C1_PC) | (1 << CP0C1_WR) | (1 << CP0C1_EP), .CP0_Config2 = MIPS_CONFIG2, .CP0_Config3 = MIPS_CONFIG3, .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x32F8FFFF, .SEGBITS = 42, }, { .name = "5Kf", .CP0_PRid = 0x00018100, .CP0_Config0 = MIPS_CONFIG0 | (0x2 << CP0C0_AT), .CP0_Config1 = MIPS_CONFIG1 | (1 << CP0C1_FP) | (31 << CP0C1_MMU) | (1 << CP0C1_IS) | (4 << CP0C1_IL) | (1 << CP0C1_IA) | (1 << CP0C1_DS) | (4 << CP0C1_DL) | (1 << CP0C1_DA) | (1 << CP0C1_PC) | (1 << CP0C1_WR) | (1 << CP0C1_EP), .CP0_Config2 = MIPS_CONFIG2, .CP0_Config3 = MIPS_CONFIG3, .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x36F8FFFF, /* The 5Kf has F64 / L / W but doesn't use the fcr0 bits. */ .CP1_fcr0 = (1 << FCR0_D) | (1 << FCR0_S) | (0x81 << FCR0_PRID) | (0x0 << FCR0_REV), .SEGBITS = 42, }, { .name = "20Kc", /* We emulate a later version of the 20Kc, earlier ones had a broken WAIT instruction. */ .CP0_PRid = 0x000182a0, .CP0_Config0 = MIPS_CONFIG0 | (0x2 << CP0C0_AT) | (1 << CP0C0_VI), .CP0_Config1 = MIPS_CONFIG1 | (1 << CP0C1_FP) | (47 << CP0C1_MMU) | (2 << CP0C1_IS) | (4 << CP0C1_IL) | (3 << CP0C1_IA) | (2 << CP0C1_DS) | (4 << CP0C1_DL) | (3 << CP0C1_DA) | (1 << CP0C1_PC) | (1 << CP0C1_WR) | (1 << CP0C1_EP), .CP0_Config2 = MIPS_CONFIG2, .CP0_Config3 = MIPS_CONFIG3, .SYNCI_Step = 32, .CCRes = 2, .Status_rw_bitmask = 0x36FBFFFF, /* The 20Kc has F64 / L / W but doesn't use the fcr0 bits. */ .CP1_fcr0 = (1 << FCR0_3D) | (1 << FCR0_PS) | (1 << FCR0_D) | (1 << FCR0_S) | (0x82 << FCR0_PRID) | (0x0 << FCR0_REV), .SEGBITS = 40, }, #endif }; int mips_find_by_name (const unsigned char *name, mips_def_t **def) { int i, ret; ret = -1; *def = NULL; for (i = 0; i < sizeof(mips_defs) / sizeof(mips_defs[0]); i++) { if (strcasecmp(name, mips_defs[i].name) == 0) { *def = &mips_defs[i]; ret = 0; break; } } return ret; } void mips_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) { int i; for (i = 0; i < sizeof(mips_defs) / sizeof(mips_defs[0]); i++) { (*cpu_fprintf)(f, "MIPS '%s'\n", mips_defs[i].name); } } #ifndef CONFIG_USER_ONLY static void no_mmu_init (CPUMIPSState *env, mips_def_t *def) { env->nb_tlb = 1; env->map_address = &no_mmu_map_address; } static void fixed_mmu_init (CPUMIPSState *env, mips_def_t *def) { env->nb_tlb = 1; env->map_address = &fixed_mmu_map_address; } static void r4k_mmu_init (CPUMIPSState *env, mips_def_t *def) { env->nb_tlb = 1 + ((def->CP0_Config1 >> CP0C1_MMU) & 63); env->map_address = &r4k_map_address; env->do_tlbwi = r4k_do_tlbwi; env->do_tlbwr = r4k_do_tlbwr; env->do_tlbp = r4k_do_tlbp; env->do_tlbr = r4k_do_tlbr; } #endif /* CONFIG_USER_ONLY */ int cpu_mips_register (CPUMIPSState *env, mips_def_t *def) { if (!def) def = env->cpu_model; if (!def) cpu_abort(env, "Unable to find MIPS CPU definition\n"); env->cpu_model = def; env->CP0_PRid = def->CP0_PRid; env->CP0_Config0 = def->CP0_Config0; #ifdef TARGET_WORDS_BIGENDIAN env->CP0_Config0 |= (1 << CP0C0_BE); #endif env->CP0_Config1 = def->CP0_Config1; env->CP0_Config2 = def->CP0_Config2; env->CP0_Config3 = def->CP0_Config3; env->CP0_Config6 = def->CP0_Config6; env->CP0_Config7 = def->CP0_Config7; env->SYNCI_Step = def->SYNCI_Step; env->CCRes = def->CCRes; env->Status_rw_bitmask = def->Status_rw_bitmask; env->fcr0 = def->CP1_fcr0; #ifdef TARGET_MIPS64 if ((env->CP0_Config0 & (0x3 << CP0C0_AT))) { env->hflags |= MIPS_HFLAG_64; env->SEGBITS = def->SEGBITS; env->SEGMask = (3ULL << 62) | ((1ULL << def->SEGBITS) - 1); } else { env->SEGBITS = 32; env->SEGMask = 0xFFFFFFFF; } #endif #ifdef CONFIG_USER_ONLY if (env->CP0_Config1 & (1 << CP0C1_FP)) env->hflags |= MIPS_HFLAG_FPU; if (env->fcr0 & (1 << FCR0_F64)) env->hflags |= MIPS_HFLAG_F64; #else /* There are more full-featured MMU variants in older MIPS CPUs, R3000, R6000 and R8000 come to mind. If we ever support them, this check will need to look up a different place than those newfangled config registers. */ switch ((env->CP0_Config0 >> CP0C0_MT) & 3) { case 0: no_mmu_init(env, def); break; case 1: r4k_mmu_init(env, def); break; case 3: fixed_mmu_init(env, def); break; default: cpu_abort(env, "MMU type not supported\n"); } env->CP0_Random = env->nb_tlb - 1; env->tlb_in_use = env->nb_tlb; #endif /* CONFIG_USER_ONLY */ return 0; }