/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2004-2007 Cavium Networks * Copyright (C) 2008 Wind River Systems */ #include #include #include #include #include #include #include #include #include /* for memset */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_CAVIUM_DECODE_RSL extern void cvmx_interrupt_rsl_decode(void); extern int __cvmx_interrupt_ecc_report_single_bit_errors; extern void cvmx_interrupt_rsl_enable(void); #endif extern struct plat_smp_ops octeon_smp_ops; #ifdef CONFIG_PCI extern void pci_console_init(const char *arg); #endif static unsigned long long MAX_MEMORY = 512ull << 20; struct octeon_boot_descriptor *octeon_boot_desc_ptr; struct cvmx_bootinfo *octeon_bootinfo; EXPORT_SYMBOL(octeon_bootinfo); #ifdef CONFIG_CAVIUM_RESERVE32 uint64_t octeon_reserve32_memory; EXPORT_SYMBOL(octeon_reserve32_memory); #endif static int octeon_uart; extern asmlinkage void handle_int(void); extern asmlinkage void plat_irq_dispatch(void); /** * Return non zero if we are currently running in the Octeon simulator * * Returns */ int octeon_is_simulation(void) { return octeon_bootinfo->board_type == CVMX_BOARD_TYPE_SIM; } EXPORT_SYMBOL(octeon_is_simulation); /** * Return true if Octeon is in PCI Host mode. This means * Linux can control the PCI bus. * * Returns Non zero if Octeon in host mode. */ int octeon_is_pci_host(void) { #ifdef CONFIG_PCI return octeon_bootinfo->config_flags & CVMX_BOOTINFO_CFG_FLAG_PCI_HOST; #else return 0; #endif } /** * Get the clock rate of Octeon * * Returns Clock rate in HZ */ uint64_t octeon_get_clock_rate(void) { if (octeon_is_simulation()) octeon_bootinfo->eclock_hz = 6000000; return octeon_bootinfo->eclock_hz; } EXPORT_SYMBOL(octeon_get_clock_rate); /** * Write to the LCD display connected to the bootbus. This display * exists on most Cavium evaluation boards. If it doesn't exist, then * this function doesn't do anything. * * @s: String to write */ void octeon_write_lcd(const char *s) { if (octeon_bootinfo->led_display_base_addr) { void __iomem *lcd_address = ioremap_nocache(octeon_bootinfo->led_display_base_addr, 8); int i; for (i = 0; i < 8; i++, s++) { if (*s) iowrite8(*s, lcd_address + i); else iowrite8(' ', lcd_address + i); } iounmap(lcd_address); } } /** * Return the console uart passed by the bootloader * * Returns uart (0 or 1) */ int octeon_get_boot_uart(void) { int uart; #ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL uart = 1; #else uart = (octeon_boot_desc_ptr->flags & OCTEON_BL_FLAG_CONSOLE_UART1) ? 1 : 0; #endif return uart; } /** * Get the coremask Linux was booted on. * * Returns Core mask */ int octeon_get_boot_coremask(void) { return octeon_boot_desc_ptr->core_mask; } /** * Check the hardware BIST results for a CPU */ void octeon_check_cpu_bist(void) { const int coreid = cvmx_get_core_num(); unsigned long long mask; unsigned long long bist_val; /* Check BIST results for COP0 registers */ mask = 0x1f00000000ull; bist_val = read_octeon_c0_icacheerr(); if (bist_val & mask) pr_err("Core%d BIST Failure: CacheErr(icache) = 0x%llx\n", coreid, bist_val); bist_val = read_octeon_c0_dcacheerr(); if (bist_val & 1) pr_err("Core%d L1 Dcache parity error: " "CacheErr(dcache) = 0x%llx\n", coreid, bist_val); mask = 0xfc00000000000000ull; bist_val = read_c0_cvmmemctl(); if (bist_val & mask) pr_err("Core%d BIST Failure: COP0_CVM_MEM_CTL = 0x%llx\n", coreid, bist_val); write_octeon_c0_dcacheerr(0); } /** * Reboot Octeon * * @command: Command to pass to the bootloader. Currently ignored. */ static void octeon_restart(char *command) { /* Disable all watchdogs before soft reset. They don't get cleared */ #ifdef CONFIG_SMP int cpu; for_each_online_cpu(cpu) cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0); #else cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0); #endif mb(); while (1) cvmx_write_csr(CVMX_CIU_SOFT_RST, 1); } /** * Permanently stop a core. * * @arg: Ignored. */ static void octeon_kill_core(void *arg) { mb(); if (octeon_is_simulation()) { /* The simulator needs the watchdog to stop for dead cores */ cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0); /* A break instruction causes the simulator stop a core */ asm volatile ("sync\nbreak"); } } /** * Halt the system */ static void octeon_halt(void) { smp_call_function(octeon_kill_core, NULL, 0); switch (octeon_bootinfo->board_type) { case CVMX_BOARD_TYPE_NAO38: /* Driving a 1 to GPIO 12 shuts off this board */ cvmx_write_csr(CVMX_GPIO_BIT_CFGX(12), 1); cvmx_write_csr(CVMX_GPIO_TX_SET, 0x1000); break; default: octeon_write_lcd("PowerOff"); break; } octeon_kill_core(NULL); } /** * Handle all the error condition interrupts that might occur. * */ #ifdef CONFIG_CAVIUM_DECODE_RSL static irqreturn_t octeon_rlm_interrupt(int cpl, void *dev_id) { cvmx_interrupt_rsl_decode(); return IRQ_HANDLED; } #endif /** * Return a string representing the system type * * Returns */ const char *octeon_board_type_string(void) { static char name[80]; sprintf(name, "%s (%s)", cvmx_board_type_to_string(octeon_bootinfo->board_type), octeon_model_get_string(read_c0_prid())); return name; } const char *get_system_type(void) __attribute__ ((alias("octeon_board_type_string"))); void octeon_user_io_init(void) { union octeon_cvmemctl cvmmemctl; union cvmx_iob_fau_timeout fau_timeout; union cvmx_pow_nw_tim nm_tim; uint64_t cvmctl; /* Get the current settings for CP0_CVMMEMCTL_REG */ cvmmemctl.u64 = read_c0_cvmmemctl(); /* R/W If set, marked write-buffer entries time out the same * as as other entries; if clear, marked write-buffer entries * use the maximum timeout. */ cvmmemctl.s.dismarkwblongto = 1; /* R/W If set, a merged store does not clear the write-buffer * entry timeout state. */ cvmmemctl.s.dismrgclrwbto = 0; /* R/W Two bits that are the MSBs of the resultant CVMSEG LM * word location for an IOBDMA. The other 8 bits come from the * SCRADDR field of the IOBDMA. */ cvmmemctl.s.iobdmascrmsb = 0; /* R/W If set, SYNCWS and SYNCS only order marked stores; if * clear, SYNCWS and SYNCS only order unmarked * stores. SYNCWSMARKED has no effect when DISSYNCWS is * set. */ cvmmemctl.s.syncwsmarked = 0; /* R/W If set, SYNCWS acts as SYNCW and SYNCS acts as SYNC. */ cvmmemctl.s.dissyncws = 0; /* R/W If set, no stall happens on write buffer full. */ if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2)) cvmmemctl.s.diswbfst = 1; else cvmmemctl.s.diswbfst = 0; /* R/W If set (and SX set), supervisor-level loads/stores can * use XKPHYS addresses with <48>==0 */ cvmmemctl.s.xkmemenas = 0; /* R/W If set (and UX set), user-level loads/stores can use * XKPHYS addresses with VA<48>==0 */ cvmmemctl.s.xkmemenau = 0; /* R/W If set (and SX set), supervisor-level loads/stores can * use XKPHYS addresses with VA<48>==1 */ cvmmemctl.s.xkioenas = 0; /* R/W If set (and UX set), user-level loads/stores can use * XKPHYS addresses with VA<48>==1 */ cvmmemctl.s.xkioenau = 0; /* R/W If set, all stores act as SYNCW (NOMERGE must be set * when this is set) RW, reset to 0. */ cvmmemctl.s.allsyncw = 0; /* R/W If set, no stores merge, and all stores reach the * coherent bus in order. */ cvmmemctl.s.nomerge = 0; /* R/W Selects the bit in the counter used for DID time-outs 0 * = 231, 1 = 230, 2 = 229, 3 = 214. Actual time-out is * between 1x and 2x this interval. For example, with * DIDTTO=3, expiration interval is between 16K and 32K. */ cvmmemctl.s.didtto = 0; /* R/W If set, the (mem) CSR clock never turns off. */ cvmmemctl.s.csrckalwys = 0; /* R/W If set, mclk never turns off. */ cvmmemctl.s.mclkalwys = 0; /* R/W Selects the bit in the counter used for write buffer * flush time-outs (WBFLT+11) is the bit position in an * internal counter used to determine expiration. The write * buffer expires between 1x and 2x this interval. For * example, with WBFLT = 0, a write buffer expires between 2K * and 4K cycles after the write buffer entry is allocated. */ cvmmemctl.s.wbfltime = 0; /* R/W If set, do not put Istream in the L2 cache. */ cvmmemctl.s.istrnol2 = 0; /* R/W The write buffer threshold. */ cvmmemctl.s.wbthresh = 10; /* R/W If set, CVMSEG is available for loads/stores in * kernel/debug mode. */ #if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0 cvmmemctl.s.cvmsegenak = 1; #else cvmmemctl.s.cvmsegenak = 0; #endif /* R/W If set, CVMSEG is available for loads/stores in * supervisor mode. */ cvmmemctl.s.cvmsegenas = 0; /* R/W If set, CVMSEG is available for loads/stores in user * mode. */ cvmmemctl.s.cvmsegenau = 0; /* R/W Size of local memory in cache blocks, 54 (6912 bytes) * is max legal value. */ cvmmemctl.s.lmemsz = CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE; if (smp_processor_id() == 0) pr_notice("CVMSEG size: %d cache lines (%d bytes)\n", CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE, CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE * 128); write_c0_cvmmemctl(cvmmemctl.u64); /* Move the performance counter interrupts to IRQ 6 */ cvmctl = read_c0_cvmctl(); cvmctl &= ~(7 << 7); cvmctl |= 6 << 7; write_c0_cvmctl(cvmctl); /* Set a default for the hardware timeouts */ fau_timeout.u64 = 0; fau_timeout.s.tout_val = 0xfff; /* Disable tagwait FAU timeout */ fau_timeout.s.tout_enb = 0; cvmx_write_csr(CVMX_IOB_FAU_TIMEOUT, fau_timeout.u64); nm_tim.u64 = 0; /* 4096 cycles */ nm_tim.s.nw_tim = 3; cvmx_write_csr(CVMX_POW_NW_TIM, nm_tim.u64); write_octeon_c0_icacheerr(0); write_c0_derraddr1(0); } /** * Early entry point for arch setup */ void __init prom_init(void) { struct cvmx_sysinfo *sysinfo; const int coreid = cvmx_get_core_num(); int i; int argc; #ifdef CONFIG_CAVIUM_RESERVE32 int64_t addr = -1; #endif /* * The bootloader passes a pointer to the boot descriptor in * $a3, this is available as fw_arg3. */ octeon_boot_desc_ptr = (struct octeon_boot_descriptor *)fw_arg3; octeon_bootinfo = cvmx_phys_to_ptr(octeon_boot_desc_ptr->cvmx_desc_vaddr); cvmx_bootmem_init(cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr)); /* * Only enable the LED controller if we're running on a CN38XX, CN58XX, * or CN56XX. The CN30XX and CN31XX don't have an LED controller. */ if (!octeon_is_simulation() && octeon_has_feature(OCTEON_FEATURE_LED_CONTROLLER)) { cvmx_write_csr(CVMX_LED_EN, 0); cvmx_write_csr(CVMX_LED_PRT, 0); cvmx_write_csr(CVMX_LED_DBG, 0); cvmx_write_csr(CVMX_LED_PRT_FMT, 0); cvmx_write_csr(CVMX_LED_UDD_CNTX(0), 32); cvmx_write_csr(CVMX_LED_UDD_CNTX(1), 32); cvmx_write_csr(CVMX_LED_UDD_DATX(0), 0); cvmx_write_csr(CVMX_LED_UDD_DATX(1), 0); cvmx_write_csr(CVMX_LED_EN, 1); } #ifdef CONFIG_CAVIUM_RESERVE32 /* * We need to temporarily allocate all memory in the reserve32 * region. This makes sure the kernel doesn't allocate this * memory when it is getting memory from the * bootloader. Later, after the memory allocations are * complete, the reserve32 will be freed. * * Allocate memory for RESERVED32 aligned on 2MB boundary. This * is in case we later use hugetlb entries with it. */ addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20, 0, 0, 2 << 20, "CAVIUM_RESERVE32", 0); if (addr < 0) pr_err("Failed to allocate CAVIUM_RESERVE32 memory area\n"); else octeon_reserve32_memory = addr; #endif #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2 if (cvmx_read_csr(CVMX_L2D_FUS3) & (3ull << 34)) { pr_info("Skipping L2 locking due to reduced L2 cache size\n"); } else { uint32_t ebase = read_c0_ebase() & 0x3ffff000; #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_TLB /* TLB refill */ cvmx_l2c_lock_mem_region(ebase, 0x100); #endif #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_EXCEPTION /* General exception */ cvmx_l2c_lock_mem_region(ebase + 0x180, 0x80); #endif #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_LOW_LEVEL_INTERRUPT /* Interrupt handler */ cvmx_l2c_lock_mem_region(ebase + 0x200, 0x80); #endif #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_INTERRUPT cvmx_l2c_lock_mem_region(__pa_symbol(handle_int), 0x100); cvmx_l2c_lock_mem_region(__pa_symbol(plat_irq_dispatch), 0x80); #endif #ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_MEMCPY cvmx_l2c_lock_mem_region(__pa_symbol(memcpy), 0x480); #endif } #endif sysinfo = cvmx_sysinfo_get(); memset(sysinfo, 0, sizeof(*sysinfo)); sysinfo->system_dram_size = octeon_bootinfo->dram_size << 20; sysinfo->phy_mem_desc_ptr = cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr); sysinfo->core_mask = octeon_bootinfo->core_mask; sysinfo->exception_base_addr = octeon_bootinfo->exception_base_addr; sysinfo->cpu_clock_hz = octeon_bootinfo->eclock_hz; sysinfo->dram_data_rate_hz = octeon_bootinfo->dclock_hz * 2; sysinfo->board_type = octeon_bootinfo->board_type; sysinfo->board_rev_major = octeon_bootinfo->board_rev_major; sysinfo->board_rev_minor = octeon_bootinfo->board_rev_minor; memcpy(sysinfo->mac_addr_base, octeon_bootinfo->mac_addr_base, sizeof(sysinfo->mac_addr_base)); sysinfo->mac_addr_count = octeon_bootinfo->mac_addr_count; memcpy(sysinfo->board_serial_number, octeon_bootinfo->board_serial_number, sizeof(sysinfo->board_serial_number)); sysinfo->compact_flash_common_base_addr = octeon_bootinfo->compact_flash_common_base_addr; sysinfo->compact_flash_attribute_base_addr = octeon_bootinfo->compact_flash_attribute_base_addr; sysinfo->led_display_base_addr = octeon_bootinfo->led_display_base_addr; sysinfo->dfa_ref_clock_hz = octeon_bootinfo->dfa_ref_clock_hz; sysinfo->bootloader_config_flags = octeon_bootinfo->config_flags; octeon_check_cpu_bist(); octeon_uart = octeon_get_boot_uart(); /* * Disable All CIU Interrupts. The ones we need will be * enabled later. Read the SUM register so we know the write * completed. */ cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), 0); cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0); cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0); cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0); cvmx_read_csr(CVMX_CIU_INTX_SUM0((coreid * 2))); #ifdef CONFIG_SMP octeon_write_lcd("LinuxSMP"); #else octeon_write_lcd("Linux"); #endif #ifdef CONFIG_CAVIUM_GDB /* * When debugging the linux kernel, force the cores to enter * the debug exception handler to break in. */ if (octeon_get_boot_debug_flag()) { cvmx_write_csr(CVMX_CIU_DINT, 1 << cvmx_get_core_num()); cvmx_read_csr(CVMX_CIU_DINT); } #endif /* * BIST should always be enabled when doing a soft reset. L2 * Cache locking for instance is not cleared unless BIST is * enabled. Unfortunately due to a chip errata G-200 for * Cn38XX and CN31XX, BIST msut be disabled on these parts. */ if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) || OCTEON_IS_MODEL(OCTEON_CN31XX)) cvmx_write_csr(CVMX_CIU_SOFT_BIST, 0); else cvmx_write_csr(CVMX_CIU_SOFT_BIST, 1); /* Default to 64MB in the simulator to speed things up */ if (octeon_is_simulation()) MAX_MEMORY = 64ull << 20; arcs_cmdline[0] = 0; argc = octeon_boot_desc_ptr->argc; for (i = 0; i < argc; i++) { const char *arg = cvmx_phys_to_ptr(octeon_boot_desc_ptr->argv[i]); if ((strncmp(arg, "MEM=", 4) == 0) || (strncmp(arg, "mem=", 4) == 0)) { sscanf(arg + 4, "%llu", &MAX_MEMORY); MAX_MEMORY <<= 20; if (MAX_MEMORY == 0) MAX_MEMORY = 32ull << 30; } else if (strcmp(arg, "ecc_verbose") == 0) { #ifdef CONFIG_CAVIUM_REPORT_SINGLE_BIT_ECC __cvmx_interrupt_ecc_report_single_bit_errors = 1; pr_notice("Reporting of single bit ECC errors is " "turned on\n"); #endif } else if (strlen(arcs_cmdline) + strlen(arg) + 1 < sizeof(arcs_cmdline) - 1) { strcat(arcs_cmdline, " "); strcat(arcs_cmdline, arg); } } if (strstr(arcs_cmdline, "console=") == NULL) { #ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL strcat(arcs_cmdline, " console=ttyS0,115200"); #else if (octeon_uart == 1) strcat(arcs_cmdline, " console=ttyS1,115200"); else strcat(arcs_cmdline, " console=ttyS0,115200"); #endif } if (octeon_is_simulation()) { /* * The simulator uses a mtdram device pre filled with * the filesystem. Also specify the calibration delay * to avoid calculating it every time. */ strcat(arcs_cmdline, " rw root=1f00 slram=root,0x40000000,+1073741824"); } mips_hpt_frequency = octeon_get_clock_rate(); octeon_init_cvmcount(); octeon_setup_delays(); _machine_restart = octeon_restart; _machine_halt = octeon_halt; octeon_user_io_init(); register_smp_ops(&octeon_smp_ops); } void __init plat_mem_setup(void) { uint64_t mem_alloc_size; uint64_t total; int64_t memory; total = 0; /* First add the init memory we will be returning. */ memory = __pa_symbol(&__init_begin) & PAGE_MASK; mem_alloc_size = (__pa_symbol(&__init_end) & PAGE_MASK) - memory; if (mem_alloc_size > 0) { add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM); total += mem_alloc_size; } /* * The Mips memory init uses the first memory location for * some memory vectors. When SPARSEMEM is in use, it doesn't * verify that the size is big enough for the final * vectors. Making the smallest chuck 4MB seems to be enough * to consistantly work. */ mem_alloc_size = 4 << 20; if (mem_alloc_size > MAX_MEMORY) mem_alloc_size = MAX_MEMORY; /* * When allocating memory, we want incrementing addresses from * bootmem_alloc so the code in add_memory_region can merge * regions next to each other. */ cvmx_bootmem_lock(); while ((boot_mem_map.nr_map < BOOT_MEM_MAP_MAX) && (total < MAX_MEMORY)) { #if defined(CONFIG_64BIT) || defined(CONFIG_64BIT_PHYS_ADDR) memory = cvmx_bootmem_phy_alloc(mem_alloc_size, __pa_symbol(&__init_end), -1, 0x100000, CVMX_BOOTMEM_FLAG_NO_LOCKING); #elif defined(CONFIG_HIGHMEM) memory = cvmx_bootmem_phy_alloc(mem_alloc_size, 0, 1ull << 31, 0x100000, CVMX_BOOTMEM_FLAG_NO_LOCKING); #else memory = cvmx_bootmem_phy_alloc(mem_alloc_size, 0, 512 << 20, 0x100000, CVMX_BOOTMEM_FLAG_NO_LOCKING); #endif if (memory >= 0) { /* * This function automatically merges address * regions next to each other if they are * received in incrementing order. */ add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM); total += mem_alloc_size; } else { break; } } cvmx_bootmem_unlock(); #ifdef CONFIG_CAVIUM_RESERVE32 /* * Now that we've allocated the kernel memory it is safe to * free the reserved region. We free it here so that builtin * drivers can use the memory. */ if (octeon_reserve32_memory) cvmx_bootmem_free_named("CAVIUM_RESERVE32"); #endif /* CONFIG_CAVIUM_RESERVE32 */ if (total == 0) panic("Unable to allocate memory from " "cvmx_bootmem_phy_alloc\n"); } int prom_putchar(char c) { uint64_t lsrval; /* Spin until there is room */ do { lsrval = cvmx_read_csr(CVMX_MIO_UARTX_LSR(octeon_uart)); } while ((lsrval & 0x20) == 0); /* Write the byte */ cvmx_write_csr(CVMX_MIO_UARTX_THR(octeon_uart), c & 0xffull); return 1; } void prom_free_prom_memory(void) { #ifdef CONFIG_CAVIUM_DECODE_RSL cvmx_interrupt_rsl_enable(); /* Add an interrupt handler for general failures. */ if (request_irq(OCTEON_IRQ_RML, octeon_rlm_interrupt, IRQF_SHARED, "RML/RSL", octeon_rlm_interrupt)) { panic("Unable to request_irq(OCTEON_IRQ_RML)\n"); } #endif }