diff options
Diffstat (limited to 'arch/arc/kernel/setup.c')
| -rw-r--r-- | arch/arc/kernel/setup.c | 101 |
1 files changed, 53 insertions, 48 deletions
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c index a7edceba5f84..151acf0c9383 100644 --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -42,13 +42,58 @@ struct task_struct *_current_task[NR_CPUS]; /* For stack switching */ struct cpuinfo_arc cpuinfo_arc700[NR_CPUS]; +static void read_decode_ccm_bcr(struct cpuinfo_arc *cpu) +{ + if (is_isa_arcompact()) { + struct bcr_iccm_arcompact iccm; + struct bcr_dccm_arcompact dccm; + + READ_BCR(ARC_REG_ICCM_BUILD, iccm); + if (iccm.ver) { + cpu->iccm.sz = 4096 << iccm.sz; /* 8K to 512K */ + cpu->iccm.base_addr = iccm.base << 16; + } + + READ_BCR(ARC_REG_DCCM_BUILD, dccm); + if (dccm.ver) { + unsigned long base; + cpu->dccm.sz = 2048 << dccm.sz; /* 2K to 256K */ + + base = read_aux_reg(ARC_REG_DCCM_BASE_BUILD); + cpu->dccm.base_addr = base & ~0xF; + } + } else { + struct bcr_iccm_arcv2 iccm; + struct bcr_dccm_arcv2 dccm; + unsigned long region; + + READ_BCR(ARC_REG_ICCM_BUILD, iccm); + if (iccm.ver) { + cpu->iccm.sz = 256 << iccm.sz00; /* 512B to 16M */ + if (iccm.sz00 == 0xF && iccm.sz01 > 0) + cpu->iccm.sz <<= iccm.sz01; + + region = read_aux_reg(ARC_REG_AUX_ICCM); + cpu->iccm.base_addr = region & 0xF0000000; + } + + READ_BCR(ARC_REG_DCCM_BUILD, dccm); + if (dccm.ver) { + cpu->dccm.sz = 256 << dccm.sz0; + if (dccm.sz0 == 0xF && dccm.sz1 > 0) + cpu->dccm.sz <<= dccm.sz1; + + region = read_aux_reg(ARC_REG_AUX_DCCM); + cpu->dccm.base_addr = region & 0xF0000000; + } + } +} + static void read_arc_build_cfg_regs(void) { - struct bcr_perip uncached_space; struct bcr_timer timer; struct bcr_generic bcr; struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()]; - unsigned long perip_space; FIX_PTR(cpu); READ_BCR(AUX_IDENTITY, cpu->core); @@ -61,14 +106,6 @@ static void read_arc_build_cfg_regs(void) cpu->vec_base = read_aux_reg(AUX_INTR_VEC_BASE); - READ_BCR(ARC_REG_D_UNCACH_BCR, uncached_space); - if (uncached_space.ver < 3) - perip_space = uncached_space.start << 24; - else - perip_space = read_aux_reg(AUX_NON_VOL) & 0xF0000000; - - BUG_ON(perip_space != ARC_UNCACHED_ADDR_SPACE); - READ_BCR(ARC_REG_MUL_BCR, cpu->extn_mpy); cpu->extn.norm = read_aux_reg(ARC_REG_NORM_BCR) > 1 ? 1 : 0; /* 2,3 */ @@ -76,36 +113,11 @@ static void read_arc_build_cfg_regs(void) cpu->extn.swap = read_aux_reg(ARC_REG_SWAP_BCR) ? 1 : 0; /* 1,3 */ cpu->extn.crc = read_aux_reg(ARC_REG_CRC_BCR) ? 1 : 0; cpu->extn.minmax = read_aux_reg(ARC_REG_MIXMAX_BCR) > 1 ? 1 : 0; /* 2 */ - - /* Note that we read the CCM BCRs independent of kernel config - * This is to catch the cases where user doesn't know that - * CCMs are present in hardware build - */ - { - struct bcr_iccm iccm; - struct bcr_dccm dccm; - struct bcr_dccm_base dccm_base; - unsigned int bcr_32bit_val; - - bcr_32bit_val = read_aux_reg(ARC_REG_ICCM_BCR); - if (bcr_32bit_val) { - iccm = *((struct bcr_iccm *)&bcr_32bit_val); - cpu->iccm.base_addr = iccm.base << 16; - cpu->iccm.sz = 0x2000 << (iccm.sz - 1); - } - - bcr_32bit_val = read_aux_reg(ARC_REG_DCCM_BCR); - if (bcr_32bit_val) { - dccm = *((struct bcr_dccm *)&bcr_32bit_val); - cpu->dccm.sz = 0x800 << (dccm.sz); - - READ_BCR(ARC_REG_DCCMBASE_BCR, dccm_base); - cpu->dccm.base_addr = dccm_base.addr << 8; - } - } - READ_BCR(ARC_REG_XY_MEM_BCR, cpu->extn_xymem); + /* Read CCM BCRs for boot reporting even if not enabled in Kconfig */ + read_decode_ccm_bcr(cpu); + read_decode_mmu_bcr(); read_decode_cache_bcr(); @@ -237,8 +249,6 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len) n += scnprintf(buf + n, len - n, "mpy[opt %d] ", opt); } - n += scnprintf(buf + n, len - n, "%s", - IS_USED_CFG(CONFIG_ARC_HAS_HW_MPY)); } n += scnprintf(buf + n, len - n, "%s%s%s%s%s%s%s%s\n", @@ -268,8 +278,8 @@ static char *arc_extn_mumbojumbo(int cpu_id, char *buf, int len) FIX_PTR(cpu); n += scnprintf(buf + n, len - n, - "Vector Table\t: %#x\nUncached Base\t: %#x\n", - cpu->vec_base, ARC_UNCACHED_ADDR_SPACE); + "Vector Table\t: %#x\nUncached Base\t: %#lx\n", + cpu->vec_base, perip_base); if (cpu->extn.fpu_sp || cpu->extn.fpu_dp) n += scnprintf(buf + n, len - n, "FPU\t\t: %s%s\n", @@ -337,11 +347,6 @@ static void arc_chk_core_config(void) pr_warn("CONFIG_ARC_FPU_SAVE_RESTORE needed for working apps\n"); else if (!cpu->extn.fpu_dp && fpu_enabled) panic("FPU non-existent, disable CONFIG_ARC_FPU_SAVE_RESTORE\n"); - - if (is_isa_arcv2() && IS_ENABLED(CONFIG_SMP) && cpu->isa.atomic && - IS_ENABLED(CONFIG_ARC_HAS_LLSC) && - !IS_ENABLED(CONFIG_ARC_STAR_9000923308)) - panic("llock/scond livelock workaround missing\n"); } /* @@ -444,7 +449,7 @@ static int __init customize_machine(void) * Traverses flattened DeviceTree - registering platform devices * (if any) complete with their resources */ - of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); + of_platform_default_populate(NULL, NULL, NULL); if (machine_desc->init_machine) machine_desc->init_machine(); |
