diff options
Diffstat (limited to 'arch/blackfin/kernel/setup.c')
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 97 |
1 files changed, 63 insertions, 34 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 7a82d10b4eb..7f35d1046cd 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -42,6 +42,7 @@ EXPORT_SYMBOL(memory_start); EXPORT_SYMBOL(memory_end); EXPORT_SYMBOL(physical_mem_end); EXPORT_SYMBOL(_ramend); +EXPORT_SYMBOL(reserved_mem_dcache_on); #ifdef CONFIG_MTD_UCLINUX unsigned long memory_mtd_end, memory_mtd_start, mtd_size; @@ -52,7 +53,8 @@ EXPORT_SYMBOL(mtd_size); #endif char __initdata command_line[COMMAND_LINE_SIZE]; -unsigned int __initdata *__retx; +void __initdata *init_retx, *init_saved_retx, *init_saved_seqstat, + *init_saved_icplb_fault_addr, *init_saved_dcplb_fault_addr; /* boot memmap, for parsing "memmap=" */ #define BFIN_MEMMAP_MAX 128 /* number of entries in bfin_memmap */ @@ -77,10 +79,10 @@ static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata; static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata; static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata; -void __init bf53x_cache_init(void) +void __init bfin_cache_init(void) { #if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE) - generate_cpl_tables(); + generate_cplb_tables(); #endif #ifdef CONFIG_BFIN_ICACHE @@ -100,7 +102,7 @@ void __init bf53x_cache_init(void) #endif } -void __init bf53x_relocate_l1_mem(void) +void __init bfin_relocate_l1_mem(void) { unsigned long l1_code_length; unsigned long l1_data_a_length; @@ -410,7 +412,7 @@ static __init void parse_cmdline_early(char *cmdline_p) * [_rambase, _ramstart]: kernel image * [memory_start, memory_end]: dynamic memory managed by kernel * [memory_end, _ramend]: reserved memory - * [meory_mtd_start(memory_end), + * [memory_mtd_start(memory_end), * memory_mtd_start + mtd_size]: rootfs (if any) * [_ramend - DMA_UNCACHED_REGION, * _ramend]: uncached DMA region @@ -782,16 +784,25 @@ void __init setup_arch(char **cmdline_p) _bfin_swrst = bfin_read_SWRST(); - /* If we double fault, reset the system - otherwise we hang forever */ - bfin_write_SWRST(DOUBLE_FAULT); +#ifdef CONFIG_DEBUG_DOUBLEFAULT_PRINT + bfin_write_SWRST(_bfin_swrst & ~DOUBLE_FAULT); +#endif +#ifdef CONFIG_DEBUG_DOUBLEFAULT_RESET + bfin_write_SWRST(_bfin_swrst | DOUBLE_FAULT); +#endif - if (_bfin_swrst & RESET_DOUBLE) - /* - * don't decode the address, since you don't know if this - * kernel's symbol map is the same as the crashing kernel - */ - printk(KERN_INFO "Recovering from Double Fault event at %pF\n", __retx); - else if (_bfin_swrst & RESET_WDOG) + if (_bfin_swrst & RESET_DOUBLE) { + printk(KERN_EMERG "Recovering from DOUBLE FAULT event\n"); +#ifdef CONFIG_DEBUG_DOUBLEFAULT + /* We assume the crashing kernel, and the current symbol table match */ + printk(KERN_EMERG " While handling exception (EXCAUSE = 0x%x) at %pF\n", + (int)init_saved_seqstat & SEQSTAT_EXCAUSE, init_saved_retx); + printk(KERN_NOTICE " DCPLB_FAULT_ADDR: %pF\n", init_saved_dcplb_fault_addr); + printk(KERN_NOTICE " ICPLB_FAULT_ADDR: %pF\n", init_saved_icplb_fault_addr); +#endif + printk(KERN_NOTICE " The instruction at %pF caused a double exception\n", + init_retx); + } else if (_bfin_swrst & RESET_WDOG) printk(KERN_INFO "Recovering from Watchdog event\n"); else if (_bfin_swrst & RESET_SOFTWARE) printk(KERN_NOTICE "Reset caused by Software reset\n"); @@ -803,17 +814,24 @@ void __init setup_arch(char **cmdline_p) printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU); else printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid()); - if (bfin_revid() != bfin_compiled_revid()) { - if (bfin_compiled_revid() == -1) - printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n", - bfin_revid()); - else if (bfin_compiled_revid() != 0xffff) - printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n", - bfin_compiled_revid(), bfin_revid()); + + if (unlikely(CPUID != bfin_cpuid())) + printk(KERN_ERR "ERROR: Not running on ADSP-%s: unknown CPUID 0x%04x Rev 0.%d\n", + CPU, bfin_cpuid(), bfin_revid()); + else { + if (bfin_revid() != bfin_compiled_revid()) { + if (bfin_compiled_revid() == -1) + printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n", + bfin_revid()); + else if (bfin_compiled_revid() != 0xffff) + printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n", + bfin_compiled_revid(), bfin_revid()); + } + if (bfin_revid() <= CONFIG_BF_REV_MIN || bfin_revid() > CONFIG_BF_REV_MAX) + printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n", + CPU, bfin_revid()); } - if (bfin_revid() < SUPPORTED_REVID) - printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n", - CPU, bfin_revid()); + printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n"); printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n", @@ -850,7 +868,7 @@ void __init setup_arch(char **cmdline_p) != SAFE_USER_INSTRUCTION - FIXED_CODE_START); init_exception_vectors(); - bf53x_cache_init(); + bfin_cache_init(); } static int __init topology_init(void) @@ -986,13 +1004,18 @@ static int show_cpuinfo(struct seq_file *m, void *v) } seq_printf(m, "processor\t: %d\n" - "vendor_id\t: %s\n" - "cpu family\t: 0x%x\n" - "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n" + "vendor_id\t: %s\n", + *(unsigned int *)v, + vendor); + + if (CPUID == bfin_cpuid()) + seq_printf(m, "cpu family\t: 0x%04x\n", CPUID); + else + seq_printf(m, "cpu family\t: Compiled for:0x%04x, running on:0x%04x\n", + CPUID, bfin_cpuid()); + + seq_printf(m, "model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n" "stepping\t: %d\n", - 0, - vendor, - (bfin_read_CHIPID() & CHIPID_FAMILY), cpu, cclk/1000000, sclk/1000000, #ifdef CONFIG_MPU "mpu on", @@ -1038,7 +1061,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) if ((bfin_read_DMEM_CONTROL() & (ENDCPLB | DMC_ENABLE)) != (ENDCPLB | DMC_ENABLE)) dcache_size = 0; - if ((bfin_read_IMEM_CONTROL() & (IMC | ENICPLB)) == (IMC | ENICPLB)) + if ((bfin_read_IMEM_CONTROL() & (IMC | ENICPLB)) != (IMC | ENICPLB)) icache_size = 0; seq_printf(m, "cache size\t: %d KB(L1 icache) " @@ -1127,12 +1150,18 @@ static int show_cpuinfo(struct seq_file *m, void *v) static void *c_start(struct seq_file *m, loff_t *pos) { - return *pos < NR_CPUS ? ((void *)0x12345678) : NULL; + if (*pos == 0) + *pos = first_cpu(cpu_online_map); + if (*pos >= num_online_cpus()) + return NULL; + + return pos; } static void *c_next(struct seq_file *m, void *v, loff_t *pos) { - ++*pos; + *pos = next_cpu(*pos, cpu_online_map); + return c_start(m, pos); } |