diff options
Diffstat (limited to 'arch/blackfin/kernel')
22 files changed, 735 insertions, 372 deletions
diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile index 318b9b692a48..6140cd69c782 100644 --- a/arch/blackfin/kernel/Makefile +++ b/arch/blackfin/kernel/Makefile @@ -6,9 +6,15 @@ extra-y := init_task.o vmlinux.lds obj-y := \ entry.o process.o bfin_ksyms.o ptrace.o setup.o signal.o \ - sys_bfin.o time.o traps.o irqchip.o dma-mapping.o flat.o \ + sys_bfin.o traps.o irqchip.o dma-mapping.o flat.o \ fixed_code.o reboot.o bfin_gpio.o +ifeq ($(CONFIG_GENERIC_CLOCKEVENTS),y) + obj-y += time-ts.o +else + obj-y += time.o +endif + obj-$(CONFIG_BFIN_GPTIMERS) += gptimers.o obj-$(CONFIG_MODULES) += module.o obj-$(CONFIG_BFIN_DMA_5XX) += bfin_dma_5xx.o diff --git a/arch/blackfin/kernel/asm-offsets.c b/arch/blackfin/kernel/asm-offsets.c index b56b2741cdea..721f15f3cebf 100644 --- a/arch/blackfin/kernel/asm-offsets.c +++ b/arch/blackfin/kernel/asm-offsets.c @@ -34,8 +34,7 @@ #include <linux/hardirq.h> #include <linux/irq.h> #include <linux/thread_info.h> - -#define DEFINE(sym, val) asm volatile("\n->" #sym " %0 " #val : : "i" (val)) +#include <linux/kbuild.h> int main(void) { diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index 8fd5d22cec34..fd5448d6107c 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -67,7 +67,7 @@ static int __init blackfin_dma_init(void) for (i = 0; i < MAX_BLACKFIN_DMA_CHANNEL; i++) { dma_ch[i].chan_status = DMA_CHANNEL_FREE; - dma_ch[i].regs = base_addr[i]; + dma_ch[i].regs = dma_io_base_addr[i]; mutex_init(&(dma_ch[i].dmalock)); } /* Mark MEMDMA Channel 0 as requested since we're using it internally */ @@ -106,12 +106,15 @@ int request_dma(unsigned int channel, char *device_id) #ifdef CONFIG_BF54x if (channel >= CH_UART2_RX && channel <= CH_UART3_TX) { - if (strncmp(device_id, "BFIN_UART", 9) == 0) + if (strncmp(device_id, "BFIN_UART", 9) == 0) { + dma_ch[channel].regs->peripheral_map &= 0x0FFF; dma_ch[channel].regs->peripheral_map |= - (channel - CH_UART2_RX + 0xC); - else + ((channel - CH_UART2_RX + 0xC)<<12); + } else { + dma_ch[channel].regs->peripheral_map &= 0x0FFF; dma_ch[channel].regs->peripheral_map |= - (channel - CH_UART2_RX + 0x6); + ((channel - CH_UART2_RX + 0x6)<<12); + } } #endif diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index 08788f7bbfba..7e8eaf4a31bb 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -95,14 +95,14 @@ enum { AWA_data_clear = SYSCR, AWA_data_set = SYSCR, AWA_toggle = SYSCR, - AWA_maska = UART_SCR, - AWA_maska_clear = UART_SCR, - AWA_maska_set = UART_SCR, - AWA_maska_toggle = UART_SCR, - AWA_maskb = UART_GCTL, - AWA_maskb_clear = UART_GCTL, - AWA_maskb_set = UART_GCTL, - AWA_maskb_toggle = UART_GCTL, + AWA_maska = BFIN_UART_SCR, + AWA_maska_clear = BFIN_UART_SCR, + AWA_maska_set = BFIN_UART_SCR, + AWA_maska_toggle = BFIN_UART_SCR, + AWA_maskb = BFIN_UART_GCTL, + AWA_maskb_clear = BFIN_UART_GCTL, + AWA_maskb_set = BFIN_UART_GCTL, + AWA_maskb_toggle = BFIN_UART_GCTL, AWA_dir = SPORT1_STAT, AWA_polar = SPORT1_STAT, AWA_edge = SPORT1_STAT, @@ -348,11 +348,10 @@ static void portmux_setup(unsigned short per, unsigned short function) offset = port_mux_lut[y].offset; muxreg = bfin_read_PORT_MUX(); - if (offset != 1) { + if (offset != 1) muxreg &= ~(1 << offset); - } else { + else muxreg &= ~(3 << 1); - } muxreg |= (function << offset); bfin_write_PORT_MUX(muxreg); @@ -396,39 +395,11 @@ inline void portmux_setup(unsigned short portno, unsigned short function) # define portmux_setup(...) do { } while (0) #endif -#ifndef BF548_FAMILY -static void default_gpio(unsigned gpio) -{ - unsigned short bank, bitmask; - unsigned long flags; - - bank = gpio_bank(gpio); - bitmask = gpio_bit(gpio); - - local_irq_save(flags); - - gpio_bankb[bank]->maska_clear = bitmask; - gpio_bankb[bank]->maskb_clear = bitmask; - SSYNC(); - gpio_bankb[bank]->inen &= ~bitmask; - gpio_bankb[bank]->dir &= ~bitmask; - gpio_bankb[bank]->polar &= ~bitmask; - gpio_bankb[bank]->both &= ~bitmask; - gpio_bankb[bank]->edge &= ~bitmask; - AWA_DUMMY_READ(edge); - local_irq_restore(flags); -} -#else -# define default_gpio(...) do { } while (0) -#endif - static int __init bfin_gpio_init(void) { - printk(KERN_INFO "Blackfin GPIO Controller\n"); return 0; - } arch_initcall(bfin_gpio_init); @@ -821,10 +792,10 @@ int peripheral_request(unsigned short per, const char *label) local_irq_save(flags); if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { + dump_stack(); printk(KERN_ERR "%s: Peripheral %d is already reserved as GPIO by %s !\n", - __FUNCTION__, ident, get_label(ident)); - dump_stack(); + __func__, ident, get_label(ident)); local_irq_restore(flags); return -EBUSY; } @@ -833,31 +804,31 @@ int peripheral_request(unsigned short per, const char *label) u16 funct = get_portmux(ident); - /* - * Pin functions like AMC address strobes my - * be requested and used by several drivers - */ + /* + * Pin functions like AMC address strobes my + * be requested and used by several drivers + */ if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) { - /* - * Allow that the identical pin function can - * be requested from the same driver twice - */ + /* + * Allow that the identical pin function can + * be requested from the same driver twice + */ - if (cmp_label(ident, label) == 0) - goto anyway; + if (cmp_label(ident, label) == 0) + goto anyway; + dump_stack(); printk(KERN_ERR "%s: Peripheral %d function %d is already reserved by %s !\n", - __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident)); - dump_stack(); + __func__, ident, P_FUNCT2MUX(per), get_label(ident)); local_irq_restore(flags); return -EBUSY; } } -anyway: + anyway: reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); portmux_setup(ident, P_FUNCT2MUX(per)); @@ -890,47 +861,47 @@ int peripheral_request(unsigned short per, const char *label) if (!check_gpio(ident)) { - if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { - printk(KERN_ERR - "%s: Peripheral %d is already reserved as GPIO by %s !\n", - __FUNCTION__, ident, get_label(ident)); - dump_stack(); - local_irq_restore(flags); - return -EBUSY; - } + if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { + dump_stack(); + printk(KERN_ERR + "%s: Peripheral %d is already reserved as GPIO by %s !\n", + __func__, ident, get_label(ident)); + local_irq_restore(flags); + return -EBUSY; + } } if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { - /* - * Pin functions like AMC address strobes my - * be requested and used by several drivers - */ + /* + * Pin functions like AMC address strobes my + * be requested and used by several drivers + */ - if (!(per & P_MAYSHARE)) { + if (!(per & P_MAYSHARE)) { - /* - * Allow that the identical pin function can - * be requested from the same driver twice - */ + /* + * Allow that the identical pin function can + * be requested from the same driver twice + */ - if (cmp_label(ident, label) == 0) - goto anyway; + if (cmp_label(ident, label) == 0) + goto anyway; + dump_stack(); printk(KERN_ERR "%s: Peripheral %d function %d is already" " reserved by %s !\n", - __FUNCTION__, ident, P_FUNCT2MUX(per), + __func__, ident, P_FUNCT2MUX(per), get_label(ident)); - dump_stack(); local_irq_restore(flags); return -EBUSY; } } -anyway: + anyway: portmux_setup(per, P_FUNCT2MUX(per)); port_setup(ident, PERIPHERAL_USAGE); @@ -944,7 +915,7 @@ anyway: EXPORT_SYMBOL(peripheral_request); #endif -int peripheral_request_list(unsigned short per[], const char *label) +int peripheral_request_list(const unsigned short per[], const char *label) { u16 cnt; int ret; @@ -954,10 +925,10 @@ int peripheral_request_list(unsigned short per[], const char *label) ret = peripheral_request(per[cnt], label); if (ret < 0) { - for ( ; cnt > 0; cnt--) { + for ( ; cnt > 0; cnt--) peripheral_free(per[cnt - 1]); - } - return ret; + + return ret; } } @@ -981,15 +952,13 @@ void peripheral_free(unsigned short per) local_irq_save(flags); - if (unlikely(!(reserved_peri_map[gpio_bank(ident)] - & gpio_bit(ident)))) { + if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) { local_irq_restore(flags); return; } - if (!(per & P_MAYSHARE)) { + if (!(per & P_MAYSHARE)) port_setup(ident, GPIO_USAGE); - } reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident); @@ -999,14 +968,11 @@ void peripheral_free(unsigned short per) } EXPORT_SYMBOL(peripheral_free); -void peripheral_free_list(unsigned short per[]) +void peripheral_free_list(const unsigned short per[]) { u16 cnt; - - for (cnt = 0; per[cnt] != 0; cnt++) { + for (cnt = 0; per[cnt] != 0; cnt++) peripheral_free(per[cnt]); - } - } EXPORT_SYMBOL(peripheral_free_list); @@ -1046,17 +1012,17 @@ int gpio_request(unsigned gpio, const char *label) } if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + dump_stack(); printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n", gpio, get_label(gpio)); - dump_stack(); local_irq_restore(flags); return -EBUSY; } if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) { + dump_stack(); printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n", gpio, get_label(gpio)); - dump_stack(); local_irq_restore(flags); return -EBUSY; } @@ -1082,14 +1048,12 @@ void gpio_free(unsigned gpio) local_irq_save(flags); if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) { - gpio_error(gpio); dump_stack(); + gpio_error(gpio); local_irq_restore(flags); return; } - default_gpio(gpio); - reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); set_label(gpio, "free"); @@ -1152,6 +1116,18 @@ int gpio_get_value(unsigned gpio) } EXPORT_SYMBOL(gpio_get_value); +void bfin_gpio_irq_prepare(unsigned gpio) +{ + unsigned long flags; + + port_setup(gpio, GPIO_USAGE); + + local_irq_save(flags); + gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio); + gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio); + local_irq_restore(flags); +} + #else int gpio_direction_input(unsigned gpio) @@ -1218,6 +1194,11 @@ void bfin_gpio_reset_spi0_ssel1(void) udelay(1); } +void bfin_gpio_irq_prepare(unsigned gpio) +{ + port_setup(gpio, GPIO_USAGE); +} + #endif /*BF548_FAMILY */ #if defined(CONFIG_PROC_FS) diff --git a/arch/blackfin/kernel/bfin_ksyms.c b/arch/blackfin/kernel/bfin_ksyms.c index 0bfbb269e350..053edff6c0d8 100644 --- a/arch/blackfin/kernel/bfin_ksyms.c +++ b/arch/blackfin/kernel/bfin_ksyms.c @@ -42,11 +42,6 @@ EXPORT_SYMBOL(ip_fast_csum); EXPORT_SYMBOL(kernel_thread); -EXPORT_SYMBOL(__up); -EXPORT_SYMBOL(__down); -EXPORT_SYMBOL(__down_trylock); -EXPORT_SYMBOL(__down_interruptible); - EXPORT_SYMBOL(is_in_rom); EXPORT_SYMBOL(bfin_return_from_exception); diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinfo.c b/arch/blackfin/kernel/cplb-mpu/cplbinfo.c index bd072299f7f2..822beefa3a4b 100644 --- a/arch/blackfin/kernel/cplb-mpu/cplbinfo.c +++ b/arch/blackfin/kernel/cplb-mpu/cplbinfo.c @@ -39,14 +39,6 @@ #include <asm/cplbinit.h> #include <asm/blackfin.h> -#define CPLB_I 1 -#define CPLB_D 2 - -#define SYNC_SYS SSYNC() -#define SYNC_CORE CSYNC() - -#define CPLB_BIT_PAGESIZE 0x30000 - static char page_size_string_table[][4] = { "1K", "4K", "1M", "4M" }; static char *cplb_print_entry(char *buf, struct cplb_entry *tbl, int switched) diff --git a/arch/blackfin/kernel/cplb-mpu/cplbinit.c b/arch/blackfin/kernel/cplb-mpu/cplbinit.c index dc6e8a7a8bda..48060105346a 100644 --- a/arch/blackfin/kernel/cplb-mpu/cplbinit.c +++ b/arch/blackfin/kernel/cplb-mpu/cplbinit.c @@ -43,13 +43,15 @@ void __init generate_cpl_tables(void) unsigned long d_data, i_data; unsigned long d_cache = 0, i_cache = 0; + printk(KERN_INFO "MPU: setting up cplb tables with memory protection\n"); + #ifdef CONFIG_BFIN_ICACHE i_cache = CPLB_L1_CHBL | ANOMALY_05000158_WORKAROUND; #endif #ifdef CONFIG_BFIN_DCACHE d_cache = CPLB_L1_CHBL; -#ifdef CONFIG_BLKFIN_WT +#ifdef CONFIG_BFIN_WT d_cache |= CPLB_L1_AOW | CPLB_WT; #endif #endif diff --git a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c index c426a22f9907..99f2831e2964 100644 --- a/arch/blackfin/kernel/cplb-mpu/cplbmgr.c +++ b/arch/blackfin/kernel/cplb-mpu/cplbmgr.c @@ -24,8 +24,6 @@ #include <asm/cplbinit.h> #include <asm/mmu_context.h> -#ifdef CONFIG_BFIN_ICACHE - #define FAULT_RW (1 << 16) #define FAULT_USERSUPV (1 << 17) @@ -143,30 +141,48 @@ static noinline int dcplb_miss(void) unsigned long d_data; nr_dcplb_miss++; - if (addr >= _ramend) - return CPLB_PROT_VIOL; d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB; #ifdef CONFIG_BFIN_DCACHE - d_data |= CPLB_L1_CHBL | ANOMALY_05000158_WORKAROUND; -#ifdef CONFIG_BLKFIN_WT - d_data |= CPLB_L1_AOW | CPLB_WT; -#endif + if (addr < _ramend - DMA_UNCACHED_REGION || + (reserved_mem_dcache_on && addr >= _ramend && + addr < physical_mem_end)) { + d_data |= CPLB_L1_CHBL | ANOMALY_05000158_WORKAROUND; +#ifdef CONFIG_BFIN_WT + d_data |= CPLB_L1_AOW | CPLB_WT; #endif - mask = current_rwx_mask; - if (mask) { - int page = addr >> PAGE_SHIFT; - int offs = page >> 5; - int bit = 1 << (page & 31); - - if (mask[offs] & bit) - d_data |= CPLB_USER_RD; - - mask += page_mask_nelts; - if (mask[offs] & bit) - d_data |= CPLB_USER_WR; } +#endif + if (addr >= physical_mem_end) { + if (addr >= ASYNC_BANK0_BASE && addr < ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE + && (status & FAULT_USERSUPV)) { + addr &= ~0x3fffff; + d_data &= ~PAGE_SIZE_4KB; + d_data |= PAGE_SIZE_4MB; + } else if (addr >= BOOT_ROM_START && addr < BOOT_ROM_START + BOOT_ROM_LENGTH + && (status & (FAULT_RW | FAULT_USERSUPV)) == FAULT_USERSUPV) { + addr &= ~(1 * 1024 * 1024 - 1); + d_data &= ~PAGE_SIZE_4KB; + d_data |= PAGE_SIZE_1MB; + } else + return CPLB_PROT_VIOL; + } else if (addr >= _ramend) { + d_data |= CPLB_USER_RD | CPLB_USER_WR; + } else { + mask = current_rwx_mask; + if (mask) { + int page = addr >> PAGE_SHIFT; + int offs = page >> 5; + int bit = 1 << (page & 31); + + if (mask[offs] & bit) + d_data |= CPLB_USER_RD; + mask += page_mask_nelts; + if (mask[offs] & bit) + d_data |= CPLB_USER_WR; + } + } idx = evict_one_dcplb(); addr &= PAGE_MASK; @@ -189,12 +205,14 @@ static noinline int icplb_miss(void) unsigned long i_data; nr_icplb_miss++; - if (status & FAULT_USERSUPV) - nr_icplb_supv_miss++; - if (addr >= _ramend) + /* If inside the uncached DMA region, fault. */ + if (addr >= _ramend - DMA_UNCACHED_REGION && addr < _ramend) return CPLB_PROT_VIOL; + if (status & FAULT_USERSUPV) + nr_icplb_supv_miss++; + /* * First, try to find a CPLB that matches this address. If we * find one, then the fact that we're in the miss handler means @@ -211,30 +229,48 @@ static noinline int icplb_miss(void) } i_data = CPLB_VALID | CPLB_PORTPRIO | PAGE_SIZE_4KB; -#ifdef CONFIG_BFIN_ICACHE - i_data |= CPLB_L1_CHBL | ANOMALY_05000158_WORKAROUND; -#endif +#ifdef CONFIG_BFIN_ICACHE /* - * Two cases to distinguish - a supervisor access must necessarily - * be for a module page; we grant it unconditionally (could do better - * here in the future). Otherwise, check the x bitmap of the current - * process. + * Normal RAM, and possibly the reserved memory area, are + * cacheable. */ - if (!(status & FAULT_USERSUPV)) { - unsigned long *mask = current_rwx_mask; - - if (mask) { - int page = addr >> PAGE_SHIFT; - int offs = page >> 5; - int bit = 1 << (page & 31); + if (addr < _ramend || + (addr < physical_mem_end && reserved_mem_icache_on)) + i_data |= CPLB_L1_CHBL | ANOMALY_05000158_WORKAROUND; +#endif - mask += 2 * page_mask_nelts; - if (mask[offs] & bit) - i_data |= CPLB_USER_RD; + if (addr >= physical_mem_end) { + if (addr >= BOOT_ROM_START && addr < BOOT_ROM_START + BOOT_ROM_LENGTH + && (status & FAULT_USERSUPV)) { + addr &= ~(1 * 1024 * 1024 - 1); + i_data &= ~PAGE_SIZE_4KB; + i_data |= PAGE_SIZE_1MB; + } else + return CPLB_PROT_VIOL; + } else if (addr >= _ramend) { + i_data |= CPLB_USER_RD; + } else { + /* + * Two cases to distinguish - a supervisor access must + * necessarily be for a module page; we grant it + * unconditionally (could do better here in the future). + * Otherwise, check the x bitmap of the current process. + */ + if (!(status & FAULT_USERSUPV)) { + unsigned long *mask = current_rwx_mask; + + if (mask) { + int page = addr >> PAGE_SHIFT; + int offs = page >> 5; + int bit = 1 << (page & 31); + + mask += 2 * page_mask_nelts; + if (mask[offs] & bit) + i_data |= CPLB_USER_RD; + } } } - idx = evict_one_icplb(); addr &= PAGE_MASK; icplb_tbl[idx].addr = addr; @@ -250,7 +286,6 @@ static noinline int icplb_miss(void) static noinline int dcplb_protection_fault(void) { - unsigned long addr = bfin_read_DCPLB_FAULT_ADDR(); int status = bfin_read_DCPLB_STATUS(); nr_dcplb_prot++; @@ -280,8 +315,7 @@ int cplb_hdr(int seqstat, struct pt_regs *regs) case 0x26: return dcplb_miss(); default: - return 1; - panic_cplb_error(seqstat, regs); + return 1; } } @@ -299,7 +333,7 @@ void flush_switched_cplbs(void) enable_icplb(); disable_dcplb(); - for (i = first_mask_dcplb; i < MAX_CPLBS; i++) { + for (i = first_switched_dcplb; i < MAX_CPLBS; i++) { dcplb_tbl[i].data = 0; bfin_write32(DCPLB_DATA0 + i * 4, 0); } @@ -319,7 +353,7 @@ void set_mask_dcplbs(unsigned long *masks) d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB; #ifdef CONFIG_BFIN_DCACHE d_data |= CPLB_L1_CHBL; -#ifdef CONFIG_BLKFIN_WT +#ifdef CONFIG_BFIN_WT d_data |= CPLB_L1_AOW | CPLB_WT; #endif #endif @@ -334,5 +368,3 @@ void set_mask_dcplbs(unsigned long *masks) } enable_dcplb(); } - -#endif diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinfo.c b/arch/blackfin/kernel/cplb-nompu/cplbinfo.c index a4f0b428a34d..1e74f0b97996 100644 --- a/arch/blackfin/kernel/cplb-nompu/cplbinfo.c +++ b/arch/blackfin/kernel/cplb-nompu/cplbinfo.c @@ -33,9 +33,7 @@ #include <linux/proc_fs.h> #include <linux/uaccess.h> -#include <asm/current.h> -#include <asm/system.h> -#include <asm/cplb.h> +#include <asm/cplbinit.h> #include <asm/blackfin.h> #define CPLB_I 1 @@ -174,16 +172,6 @@ static int cplbinfo_read_proc(char *page, char **start, off_t off, return len; } -static int cplbinfo_write_proc(struct file *file, const char __user *buffer, - unsigned long count, void *data) -{ - printk(KERN_INFO "Reset the CPLB swap in/out counts.\n"); - memset(ipdt_swapcount_table, 0, MAX_SWITCH_I_CPLBS * sizeof(unsigned long)); - memset(dpdt_swapcount_table, 0, MAX_SWITCH_D_CPLBS * sizeof(unsigned long)); - - return count; -} - static int __init cplbinfo_init(void) { struct proc_dir_entry *entry; @@ -193,7 +181,6 @@ static int __init cplbinfo_init(void) return -ENOMEM; entry->read_proc = cplbinfo_read_proc; - entry->write_proc = cplbinfo_write_proc; entry->data = NULL; return 0; diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinit.c b/arch/blackfin/kernel/cplb-nompu/cplbinit.c index 6320bc45fbba..917325bfbd84 100644 --- a/arch/blackfin/kernel/cplb-nompu/cplbinit.c +++ b/arch/blackfin/kernel/cplb-nompu/cplbinit.c @@ -26,6 +26,35 @@ #include <asm/cplb.h> #include <asm/cplbinit.h> +#ifdef CONFIG_MAX_MEM_SIZE +# define CPLB_MEM CONFIG_MAX_MEM_SIZE +#else +# define CPLB_MEM CONFIG_MEM_SIZE +#endif + +/* +* Number of required data CPLB switchtable entries +* MEMSIZE / 4 (we mostly install 4M page size CPLBs +* approx 16 for smaller 1MB page size CPLBs for allignment purposes +* 1 for L1 Data Memory +* possibly 1 for L2 Data Memory +* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO +* 1 for ASYNC Memory +*/ +#define MAX_SWITCH_D_CPLBS (((CPLB_MEM / 4) + 16 + 1 + 1 + 1 \ + + ASYNC_MEMORY_CPLB_COVERAGE) * 2) + +/* +* Number of required instruction CPLB switchtable entries +* MEMSIZE / 4 (we mostly install 4M page size CPLBs +* approx 12 for smaller 1MB page size CPLBs for allignment purposes +* 1 for L1 Instruction Memory +* possibly 1 for L2 Instruction Memory +* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO +*/ +#define MAX_SWITCH_I_CPLBS (((CPLB_MEM / 4) + 12 + 1 + 1 + 1) * 2) + + u_long icplb_table[MAX_CPLBS + 1]; u_long dcplb_table[MAX_CPLBS + 1]; @@ -295,6 +324,8 @@ void __init generate_cpl_tables(void) struct cplb_tab *t_d = NULL; struct s_cplb cplb; + printk(KERN_INFO "NOMPU: setting up cplb tables for global access\n"); + cplb.init_i.size = MAX_CPLBS; cplb.init_d.size = MAX_CPLBS; cplb.switch_i.size = MAX_SWITCH_I_CPLBS; diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c index d6b61d56b656..2f62a9f4058a 100644 --- a/arch/blackfin/kernel/dma-mapping.c +++ b/arch/blackfin/kernel/dma-mapping.c @@ -59,7 +59,7 @@ void dma_alloc_init(unsigned long start, unsigned long end) memset((void *)dma_base, 0, DMA_UNCACHED_REGION); dma_initialized = 1; - printk(KERN_INFO "%s: dma_page @ 0x%p - %d pages at 0x%08lx\n", __FUNCTION__, + printk(KERN_INFO "%s: dma_page @ 0x%p - %d pages at 0x%08lx\n", __func__, dma_page, dma_pages, dma_base); } @@ -100,7 +100,7 @@ static void __free_dma_pages(unsigned long addr, unsigned int pages) int i; if ((page + pages) > dma_pages) { - printk(KERN_ERR "%s: freeing outside range.\n", __FUNCTION__); + printk(KERN_ERR "%s: freeing outside range.\n", __func__); BUG(); } diff --git a/arch/blackfin/kernel/gptimers.c b/arch/blackfin/kernel/gptimers.c index 1904d8b53328..e698554895a7 100644 --- a/arch/blackfin/kernel/gptimers.c +++ b/arch/blackfin/kernel/gptimers.c @@ -52,12 +52,14 @@ static volatile GPTIMER_timer_regs *const timer_regs[MAX_BLACKFIN_GPTIMERS] = (GPTIMER_timer_regs *)TIMER5_CONFIG, (GPTIMER_timer_regs *)TIMER6_CONFIG, (GPTIMER_timer_regs *)TIMER7_CONFIG, -#endif -#if (MAX_BLACKFIN_GPTIMERS > 8) +# if (MAX_BLACKFIN_GPTIMERS > 8) (GPTIMER_timer_regs *)TIMER8_CONFIG, (GPTIMER_timer_regs *)TIMER9_CONFIG, (GPTIMER_timer_regs *)TIMER10_CONFIG, +# if (MAX_BLACKFIN_GPTIMERS > 11) (GPTIMER_timer_regs *)TIMER11_CONFIG, +# endif +# endif #endif }; @@ -80,12 +82,14 @@ static uint32_t const trun_mask[MAX_BLACKFIN_GPTIMERS] = TIMER_STATUS_TRUN5, TIMER_STATUS_TRUN6, TIMER_STATUS_TRUN7, -#endif -#if (MAX_BLACKFIN_GPTIMERS > 8) +# if (MAX_BLACKFIN_GPTIMERS > 8) TIMER_STATUS_TRUN8, TIMER_STATUS_TRUN9, TIMER_STATUS_TRUN10, +# if (MAX_BLACKFIN_GPTIMERS > 11) TIMER_STATUS_TRUN11, +# endif +# endif #endif }; @@ -100,12 +104,14 @@ static uint32_t const tovf_mask[MAX_BLACKFIN_GPTIMERS] = TIMER_STATUS_TOVF5, TIMER_STATUS_TOVF6, TIMER_STATUS_TOVF7, -#endif -#if (MAX_BLACKFIN_GPTIMERS > 8) +# if (MAX_BLACKFIN_GPTIMERS > 8) TIMER_STATUS_TOVF8, TIMER_STATUS_TOVF9, TIMER_STATUS_TOVF10, +# if (MAX_BLACKFIN_GPTIMERS > 11) TIMER_STATUS_TOVF11, +# endif +# endif #endif }; @@ -120,12 +126,14 @@ static uint32_t const timil_mask[MAX_BLACKFIN_GPTIMERS] = TIMER_STATUS_TIMIL5, TIMER_STATUS_TIMIL6, TIMER_STATUS_TIMIL7, -#endif -#if (MAX_BLACKFIN_GPTIMERS > 8) +# if (MAX_BLACKFIN_GPTIMERS > 8) TIMER_STATUS_TIMIL8, TIMER_STATUS_TIMIL9, TIMER_STATUS_TIMIL10, +# if (MAX_BLACKFIN_GPTIMERS > 11) TIMER_STATUS_TIMIL11, +# endif +# endif #endif }; diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c index 6b8459c66163..be9fdd00d7cb 100644 --- a/arch/blackfin/kernel/process.c +++ b/arch/blackfin/kernel/process.c @@ -32,6 +32,8 @@ #include <linux/unistd.h> #include <linux/user.h> #include <linux/uaccess.h> +#include <linux/sched.h> +#include <linux/tick.h> #include <linux/fs.h> #include <linux/err.h> @@ -69,33 +71,44 @@ EXPORT_SYMBOL(pm_power_off); * The idle loop on BFIN */ #ifdef CONFIG_IDLE_L1 -void default_idle(void)__attribute__((l1_text)); +static void default_idle(void)__attribute__((l1_text)); void cpu_idle(void)__attribute__((l1_text)); #endif -void default_idle(void) +/* + * This is our default idle handler. We need to disable + * interrupts here to ensure we don't miss a wakeup call. + */ +static void default_idle(void) { - while (!need_resched()) { - local_irq_disable(); - if (likely(!need_resched())) - idle_with_irq_disabled(); - local_irq_enable(); - } -} + local_irq_disable(); + if (!need_resched()) + idle_with_irq_disabled(); -void (*idle)(void) = default_idle; + local_irq_enable(); +} /* - * The idle thread. There's no useful work to be - * done, so just try to conserve power and have a - * low exit latency (ie sit in a loop waiting for - * somebody to say that they'd like to reschedule) + * The idle thread. We try to conserve power, while trying to keep + * overall latency low. The architecture specific idle is passed + * a value to indicate the level of "idleness" of the system. */ void cpu_idle(void) { /* endless idle loop with no priority at all */ while (1) { - idle(); + void (*idle)(void) = pm_idle; + +#ifdef CONFIG_HOTPLUG_CPU + if (cpu_is_offline(smp_processor_id())) + cpu_die(); +#endif + if (!idle) + idle = default_idle; + tick_nohz_stop_sched_tick(); + while (!need_resched()) + idle(); + tick_nohz_restart_sched_tick(); preempt_enable_no_resched(); schedule(); preempt_disable(); @@ -189,7 +202,7 @@ copy_thread(int nr, unsigned long clone_flags, * sys_execve() executes a new program. */ -asmlinkage int sys_execve(char *name, char **argv, char **envp) +asmlinkage int sys_execve(char __user *name, char __user * __user *argv, char __user * __user *envp) { int error; char *filename; @@ -232,23 +245,25 @@ unsigned long get_wchan(struct task_struct *p) void finish_atomic_sections (struct pt_regs *regs) { + int __user *up0 = (int __user *)®s->p0; + if (regs->pc < ATOMIC_SEQS_START || regs->pc >= ATOMIC_SEQS_END) return; switch (regs->pc) { case ATOMIC_XCHG32 + 2: - put_user(regs->r1, (int *)regs->p0); + put_user(regs->r1, up0); regs->pc += 2; break; case ATOMIC_CAS32 + 2: case ATOMIC_CAS32 + 4: if (regs->r0 == regs->r1) - put_user(regs->r2, (int *)regs->p0); + put_user(regs->r2, up0); regs->pc = ATOMIC_CAS32 + 8; break; case ATOMIC_CAS32 + 6: - put_user(regs->r2, (int *)regs->p0); + put_user(regs->r2, up0); regs->pc += 2; break; @@ -256,7 +271,7 @@ void finish_atomic_sections (struct pt_regs *regs) regs->r0 = regs->r1 + regs->r0; /* fall through */ case ATOMIC_ADD32 + 4: - put_user(regs->r0, (int *)regs->p0); + put_user(regs->r0, up0); regs->pc = ATOMIC_ADD32 + 6; break; @@ -264,7 +279,7 @@ void finish_atomic_sections (struct pt_regs *regs) regs->r0 = regs->r1 - regs->r0; /* fall through */ case ATOMIC_SUB32 + 4: - put_user(regs->r0, (int *)regs->p0); + put_user(regs->r0, up0); regs->pc = ATOMIC_SUB32 + 6; break; @@ -272,7 +287,7 @@ void finish_atomic_sections (struct pt_regs *regs) regs->r0 = regs->r1 | regs->r0; /* fall through */ case ATOMIC_IOR32 + 4: - put_user(regs->r0, (int *)regs->p0); + put_user(regs->r0, up0); regs->pc = ATOMIC_IOR32 + 6; break; @@ -280,7 +295,7 @@ void finish_atomic_sections (struct pt_regs *regs) regs->r0 = regs->r1 & regs->r0; /* fall through */ case ATOMIC_AND32 + 4: - put_user(regs->r0, (int *)regs->p0); + put_user(regs->r0, up0); regs->pc = ATOMIC_AND32 + 6; break; @@ -288,7 +303,7 @@ void finish_atomic_sections (struct pt_regs *regs) regs->r0 = regs->r1 ^ regs->r0; /* fall through */ case ATOMIC_XOR32 + 4: - put_user(regs->r0, (int *)regs->p0); + put_user(regs->r0, up0); regs->pc = ATOMIC_XOR32 + 6; break; } @@ -309,6 +324,12 @@ int _access_ok(unsigned long addr, unsigned long size) return 1; if (addr >= memory_mtd_end && (addr + size) <= physical_mem_end) return 1; + +#ifdef CONFIG_ROMFS_MTD_FS + /* For XIP, allow user space to use pointers within the ROMFS. */ + if (addr >= memory_mtd_start && (addr + size) <= memory_mtd_end) + return 1; +#endif #else if (addr >= memory_start && (addr + size) <= physical_mem_end) return 1; diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c index 85caf9b711a1..b4f062c172c6 100644 --- a/arch/blackfin/kernel/ptrace.c +++ b/arch/blackfin/kernel/ptrace.c @@ -193,6 +193,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) { int ret; int add = 0; + unsigned long __user *datap = (unsigned long __user *)data; switch (request) { /* when I and D space are separate, these will need to be fixed. */ @@ -229,7 +230,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) pr_debug("ptrace: copied size %d [0x%08lx]\n", copied, tmp); if (copied != sizeof(tmp)) break; - ret = put_user(tmp, (unsigned long *)data); + ret = put_user(tmp, datap); break; } @@ -263,7 +264,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) } else { tmp = get_reg(child, addr); } - ret = put_user(tmp, (unsigned long *)data); + ret = put_user(tmp, datap); break; } @@ -389,7 +390,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) { /* Get all gp regs from the child. */ - ret = ptrace_getregs(child, (void __user *)data); + ret = ptrace_getregs(child, datap); break; } diff --git a/arch/blackfin/kernel/reboot.c b/arch/blackfin/kernel/reboot.c index 483f93dfc1b5..367e2dc09881 100644 --- a/arch/blackfin/kernel/reboot.c +++ b/arch/blackfin/kernel/reboot.c @@ -11,45 +11,56 @@ #include <asm/reboot.h> #include <asm/system.h> -#if defined(BF537_FAMILY) || defined(BF533_FAMILY) || defined(BF527_FAMILY) -#define SYSCR_VAL 0x0 -#elif defined(BF561_FAMILY) -#define SYSCR_VAL 0x20 -#elif defined(BF548_FAMILY) -#define SYSCR_VAL 0x10 -#endif - -/* - * Delay min 5 SCLK cycles using worst case CCLK/SCLK ratio (15) - */ -#define SWRST_DELAY (5 * 15) - -/* A system soft reset makes external memory unusable - * so force this function into L1. +/* A system soft reset makes external memory unusable so force + * this function into L1. We use the compiler ssync here rather + * than SSYNC() because it's safe (no interrupts and such) and + * we save some L1. We do not need to force sanity in the SYSCR + * register as the BMODE selection bit is cleared by the soft + * reset while the Core B bit (on dual core parts) is cleared by + * the core reset. */ __attribute__((l1_text)) void bfin_reset(void) { - /* force BMODE and disable Core B (as needed) */ - bfin_write_SYSCR(SYSCR_VAL); - - /* we use asm ssync here because it's save and we save some L1 */ - asm("ssync;"); + /* Wait for completion of "system" events such as cache line + * line fills so that we avoid infinite stalls later on as + * much as possible. This code is in L1, so it won't trigger + * any such event after this point in time. + */ + __builtin_bfin_ssync(); while (1) { - /* initiate system soft reset with magic 0x7 */ + /* Initiate System software reset. */ bfin_write_SWRST(0x7); - /* Wait for System reset to actually reset, needs to be 5 SCLKs, */ - /* Assume CCLK / SCLK ratio is worst case (15), and use 5*15 */ - - asm("LSETUP(.Lfoo,.Lfoo) LC0 = %0\n .Lfoo: NOP;\n" - : : "a" (SWRST_DELAY) : "LC0", "LT0", "LB0"); + /* Due to the way reset is handled in the hardware, we need + * to delay for 7 SCLKS. The only reliable way to do this is + * to calculate the CCLK/SCLK ratio and multiply 7. For now, + * we'll assume worse case which is a 1:15 ratio. + */ + asm( + "LSETUP (1f, 1f) LC0 = %0\n" + "1: nop;" + : + : "a" (15 * 7) + : "LC0", "LB0", "LT0" + ); - /* clear system soft reset */ + /* Clear System software reset */ bfin_write_SWRST(0); - asm("ssync;"); - /* issue core reset */ + + /* Wait for the SWRST write to complete. Cannot rely on SSYNC + * though as the System state is all reset now. + */ + asm( + "LSETUP (1f, 1f) LC1 = %0\n" + "1: nop;" + : + : "a" (15 * 1) + : "LC1", "LB1", "LT1" + ); + + /* Issue core reset */ asm("raise 1"); } } diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index 2255c289a714..8efea004aecb 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -35,6 +35,7 @@ u16 _bfin_swrst; EXPORT_SYMBOL(_bfin_swrst); unsigned long memory_start, memory_end, physical_mem_end; +unsigned long _rambase, _ramstart, _ramend; unsigned long reserved_mem_dcache_on; unsigned long reserved_mem_icache_on; EXPORT_SYMBOL(memory_start); @@ -106,7 +107,7 @@ void __init bf53x_relocate_l1_mem(void) l1_code_length = _etext_l1 - _stext_l1; if (l1_code_length > L1_CODE_LENGTH) - l1_code_length = L1_CODE_LENGTH; + panic("L1 Instruction SRAM Overflow\n"); /* cannot complain as printk is not available as yet. * But we can continue booting and complain later! */ @@ -116,19 +117,18 @@ void __init bf53x_relocate_l1_mem(void) l1_data_a_length = _ebss_l1 - _sdata_l1; if (l1_data_a_length > L1_DATA_A_LENGTH) - l1_data_a_length = L1_DATA_A_LENGTH; + panic("L1 Data SRAM Bank A Overflow\n"); /* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */ dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length); l1_data_b_length = _ebss_b_l1 - _sdata_b_l1; if (l1_data_b_length > L1_DATA_B_LENGTH) - l1_data_b_length = L1_DATA_B_LENGTH; + panic("L1 Data SRAM Bank B Overflow\n"); /* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */ dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length + l1_data_a_length, l1_data_b_length); - } /* add_memory_region to memmap */ @@ -547,11 +547,38 @@ static __init void memory_setup(void) ); } +/* + * Find the lowest, highest page frame number we have available + */ +void __init find_min_max_pfn(void) +{ + int i; + + max_pfn = 0; + min_low_pfn = memory_end; + + for (i = 0; i < bfin_memmap.nr_map; i++) { + unsigned long start, end; + /* RAM? */ + if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM) + continue; + start = PFN_UP(bfin_memmap.map[i].addr); + end = PFN_DOWN(bfin_memmap.map[i].addr + + bfin_memmap.map[i].size); + if (start >= end) + continue; + if (end > max_pfn) + max_pfn = end; + if (start < min_low_pfn) + min_low_pfn = start; + } +} + static __init void setup_bootmem_allocator(void) { int bootmap_size; int i; - unsigned long min_pfn, max_pfn; + unsigned long start_pfn, end_pfn; unsigned long curr_pfn, last_pfn, size; /* mark memory between memory_start and memory_end usable */ @@ -561,8 +588,19 @@ static __init void setup_bootmem_allocator(void) sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map); print_memory_map("boot memmap"); - min_pfn = PAGE_OFFSET >> PAGE_SHIFT; - max_pfn = memory_end >> PAGE_SHIFT; + /* intialize globals in linux/bootmem.h */ + find_min_max_pfn(); + /* pfn of the last usable page frame */ + if (max_pfn > memory_end >> PAGE_SHIFT) + max_pfn = memory_end >> PAGE_SHIFT; + /* pfn of last page frame directly mapped by kernel */ + max_low_pfn = max_pfn; + /* pfn of the first usable page frame after kernel image*/ + if (min_low_pfn < memory_start >> PAGE_SHIFT) + min_low_pfn = memory_start >> PAGE_SHIFT; + + start_pfn = PAGE_OFFSET >> PAGE_SHIFT; + end_pfn = memory_end >> PAGE_SHIFT; /* * give all the memory to the bootmap allocator, tell it to put the @@ -570,7 +608,7 @@ static __init void setup_bootmem_allocator(void) */ bootmap_size = init_bootmem_node(NODE_DATA(0), memory_start >> PAGE_SHIFT, /* map goes here */ - min_pfn, max_pfn); + start_pfn, end_pfn); /* register the memmap regions with the bootmem allocator */ for (i = 0; i < bfin_memmap.nr_map; i++) { @@ -583,7 +621,7 @@ static __init void setup_bootmem_allocator(void) * We are rounding up the start address of usable memory: */ curr_pfn = PFN_UP(bfin_memmap.map[i].addr); - if (curr_pfn >= max_pfn) + if (curr_pfn >= end_pfn) continue; /* * ... and at the end of the usable range downwards: @@ -591,8 +629,8 @@ static __init void setup_bootmem_allocator(void) last_pfn = PFN_DOWN(bfin_memmap.map[i].addr + bfin_memmap.map[i].size); - if (last_pfn > max_pfn) - last_pfn = max_pfn; + if (last_pfn > end_pfn) + last_pfn = end_pfn; /* * .. finally, did all the rounding and playing @@ -611,9 +649,59 @@ static __init void setup_bootmem_allocator(void) BOOTMEM_DEFAULT); } +#define EBSZ_TO_MEG(ebsz) \ +({ \ + int meg = 0; \ + switch (ebsz & 0xf) { \ + case 0x1: meg = 16; break; \ + case 0x3: meg = 32; break; \ + case 0x5: meg = 64; break; \ + case 0x7: meg = 128; break; \ + case 0x9: meg = 256; break; \ + case 0xb: meg = 512; break; \ + } \ + meg; \ +}) +static inline int __init get_mem_size(void) +{ +#ifdef CONFIG_MEM_SIZE + return CONFIG_MEM_SIZE; +#else +# if defined(EBIU_SDBCTL) +# if defined(BF561_FAMILY) + int ret = 0; + u32 sdbctl = bfin_read_EBIU_SDBCTL(); + ret += EBSZ_TO_MEG(sdbctl >> 0); + ret += EBSZ_TO_MEG(sdbctl >> 8); + ret += EBSZ_TO_MEG(sdbctl >> 16); + ret += EBSZ_TO_MEG(sdbctl >> 24); + return ret; +# else + return EBSZ_TO_MEG(bfin_read_EBIU_SDBCTL()); +# endif +# elif defined(EBIU_DDRCTL1) + u32 ddrctl = bfin_read_EBIU_DDRCTL1(); + int ret = 0; + switch (ddrctl & 0xc0000) { + case DEVSZ_64: ret = 64 / 8; + case DEVSZ_128: ret = 128 / 8; + case DEVSZ_256: ret = 256 / 8; + case DEVSZ_512: ret = 512 / 8; + } + switch (ddrctl & 0x30000) { + case DEVWD_4: ret *= 2; + case DEVWD_8: ret *= 2; + case DEVWD_16: break; + } + return ret; +# endif +#endif + BUG(); +} + void __init setup_arch(char **cmdline_p) { - unsigned long l1_length, sclk, cclk; + unsigned long sclk, cclk; #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; @@ -631,7 +719,7 @@ void __init setup_arch(char **cmdline_p) /* setup memory defaults from the user config */ physical_mem_end = 0; - _ramend = CONFIG_MEM_SIZE * 1024 * 1024; + _ramend = get_mem_size() * 1024 * 1024; memset(&bfin_memmap, 0, sizeof(bfin_memmap)); @@ -712,15 +800,6 @@ void __init setup_arch(char **cmdline_p) paging_init(); - /* check the size of the l1 area */ - l1_length = _etext_l1 - _stext_l1; - if (l1_length > L1_CODE_LENGTH) - panic("L1 code memory overflow\n"); - - l1_length = _ebss_l1 - _sdata_l1; - if (l1_length > L1_DATA_A_LENGTH) - panic("L1 data memory overflow\n"); - /* Copy atomic sequences to their fixed location, and sanity check that these locations are the ones that we advertise to userspace. */ memcpy((void *)FIXED_CODE_START, &fixed_code_start, @@ -859,12 +938,17 @@ 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)\n" + "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", +#else + "mpu off", +#endif revid); seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n", @@ -973,7 +1057,6 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, "No Ways are locked\n"); } #endif - seq_printf(m, "board name\t: %s\n", bfin_board_name); seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n", physical_mem_end >> 10, (void *)0, (void *)physical_mem_end); diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c index 5564c9588aa8..cb9d883d493c 100644 --- a/arch/blackfin/kernel/signal.c +++ b/arch/blackfin/kernel/signal.c @@ -38,6 +38,7 @@ #include <asm/cacheflush.h> #include <asm/ucontext.h> +#include <asm/fixed_code.h> #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) @@ -50,18 +51,20 @@ struct rt_sigframe { int sig; struct siginfo *pinfo; void *puc; + /* This is no longer needed by the kernel, but unfortunately userspace + * code expects it to be there. */ char retcode[8]; struct siginfo info; struct ucontext uc; }; -asmlinkage int sys_sigaltstack(const stack_t * uss, stack_t * uoss) +asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss) { return do_sigaltstack(uss, uoss, rdusp()); } static inline int -rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc, int *pr0) +rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *pr0) { unsigned long usp = 0; int err = 0; @@ -159,11 +162,6 @@ static inline int rt_setup_sigcontext(struct sigcontext *sc, struct pt_regs *reg return err; } -static inline void push_cache(unsigned long vaddr, unsigned int len) -{ - flush_icache_range(vaddr, vaddr + len); -} - static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size) { @@ -209,29 +207,19 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info, err |= rt_setup_sigcontext(&frame->uc.uc_mcontext, regs); err |= copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); - /* Set up to return from userspace. */ - err |= __put_user(0x28, &(frame->retcode[0])); - err |= __put_user(0xe1, &(frame->retcode[1])); - err |= __put_user(0xad, &(frame->retcode[2])); - err |= __put_user(0x00, &(frame->retcode[3])); - err |= __put_user(0xa0, &(frame->retcode[4])); - err |= __put_user(0x00, &(frame->retcode[5])); - if (err) goto give_sigsegv; - push_cache((unsigned long)&frame->retcode, sizeof(frame->retcode)); - /* Set up registers for signal handler */ wrusp((unsigned long)frame); - if (get_personality & FDPIC_FUNCPTRS) { + if (current->personality & FDPIC_FUNCPTRS) { struct fdpic_func_descriptor __user *funcptr = (struct fdpic_func_descriptor *) ka->sa.sa_handler; __get_user(regs->pc, &funcptr->text); __get_user(regs->p3, &funcptr->GOT); } else regs->pc = (unsigned long)ka->sa.sa_handler; - regs->rets = (unsigned long)(frame->retcode); + regs->rets = SIGRETURN_STUB; regs->r0 = frame->sig; regs->r1 = (unsigned long)(&frame->info); diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c index abcd14817d0e..efb7b25a2633 100644 --- a/arch/blackfin/kernel/sys_bfin.c +++ b/arch/blackfin/kernel/sys_bfin.c @@ -49,7 +49,7 @@ * sys_pipe() is the normal C calling standard for creating * a pipe. It's not the way unix traditionally does this, though. */ -asmlinkage int sys_pipe(unsigned long *fildes) +asmlinkage int sys_pipe(unsigned long __user *fildes) { int fd[2]; int error; diff --git a/arch/blackfin/kernel/time-ts.c b/arch/blackfin/kernel/time-ts.c new file mode 100644 index 000000000000..4482c47c09e5 --- /dev/null +++ b/arch/blackfin/kernel/time-ts.c @@ -0,0 +1,219 @@ +/* + * linux/arch/kernel/time-ts.c + * + * Based on arm clockevents implementation and old bfin time tick. + * + * Copyright(C) 2008, GeoTechnologies, Vitja Makarov + * + * This code is licenced under the GPL version 2. For details see + * kernel-base/COPYING. + */ +#include <linux/module.h> +#include <linux/profile.h> +#include <linux/interrupt.h> +#include <linux/time.h> +#include <linux/timex.h> +#include <linux/irq.h> +#include <linux/clocksource.h> +#include <linux/clockchips.h> +#include <linux/cpufreq.h> + +#include <asm/blackfin.h> +#include <asm/time.h> + +#ifdef CONFIG_CYCLES_CLOCKSOURCE + +/* Accelerators for sched_clock() + * convert from cycles(64bits) => nanoseconds (64bits) + * basic equation: + * ns = cycles / (freq / ns_per_sec) + * ns = cycles * (ns_per_sec / freq) + * ns = cycles * (10^9 / (cpu_khz * 10^3)) + * ns = cycles * (10^6 / cpu_khz) + * + * Then we use scaling math (suggested by george@mvista.com) to get: + * ns = cycles * (10^6 * SC / cpu_khz) / SC + * ns = cycles * cyc2ns_scale / SC + * + * And since SC is a constant power of two, we can convert the div + * into a shift. + * + * We can use khz divisor instead of mhz to keep a better precision, since + * cyc2ns_scale is limited to 10^6 * 2^10, which fits in 32 bits. + * (mathieu.desnoyers@polymtl.ca) + * + * -johnstul@us.ibm.com "math is hard, lets go shopping!" + */ + +static unsigned long cyc2ns_scale; +#define CYC2NS_SCALE_FACTOR 10 /* 2^10, carefully chosen */ + +static inline void set_cyc2ns_scale(unsigned long cpu_khz) +{ + cyc2ns_scale = (1000000 << CYC2NS_SCALE_FACTOR) / cpu_khz; +} + +static inline unsigned long long cycles_2_ns(cycle_t cyc) +{ + return (cyc * cyc2ns_scale) >> CYC2NS_SCALE_FACTOR; +} + +static cycle_t read_cycles(void) +{ + return get_cycles(); +} + +unsigned long long sched_clock(void) +{ + return cycles_2_ns(read_cycles()); +} + +static struct clocksource clocksource_bfin = { + .name = "bfin_cycles", + .rating = 350, + .read = read_cycles, + .mask = CLOCKSOURCE_MASK(64), + .shift = 22, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static int __init bfin_clocksource_init(void) +{ + set_cyc2ns_scale(get_cclk() / 1000); + + clocksource_bfin.mult = clocksource_hz2mult(get_cclk(), clocksource_bfin.shift); + + if (clocksource_register(&clocksource_bfin)) + panic("failed to register clocksource"); + + return 0; +} + +#else +# define bfin_clocksource_init() +#endif + +static int bfin_timer_set_next_event(unsigned long cycles, + struct clock_event_device *evt) +{ + bfin_write_TCOUNT(cycles); + CSYNC(); + return 0; +} + +static void bfin_timer_set_mode(enum clock_event_mode mode, + struct clock_event_device *evt) +{ + switch (mode) { + case CLOCK_EVT_MODE_PERIODIC: { + unsigned long tcount = ((get_cclk() / (HZ * TIME_SCALE)) - 1); + bfin_write_TCNTL(TMPWR); + bfin_write_TSCALE(TIME_SCALE - 1); + CSYNC(); + bfin_write_TPERIOD(tcount); + bfin_write_TCOUNT(tcount); + bfin_write_TCNTL(TMPWR | TMREN | TAUTORLD); + CSYNC(); + break; + } + case CLOCK_EVT_MODE_ONESHOT: + bfin_write_TSCALE(0); + bfin_write_TCOUNT(0); + bfin_write_TCNTL(TMPWR | TMREN); + CSYNC(); + break; + case CLOCK_EVT_MODE_UNUSED: + case CLOCK_EVT_MODE_SHUTDOWN: + bfin_write_TCNTL(0); + CSYNC(); + break; + case CLOCK_EVT_MODE_RESUME: + break; + } +} + +static void __init bfin_timer_init(void) +{ + /* power up the timer, but don't enable it just yet */ + bfin_write_TCNTL(TMPWR); + CSYNC(); + + /* + * the TSCALE prescaler counter. + */ + bfin_write_TSCALE(TIME_SCALE - 1); + bfin_write_TPERIOD(0); + bfin_write_TCOUNT(0); + + /* now enable the timer */ + CSYNC(); +} + +/* + * timer_interrupt() needs to keep up the real-time clock, + * as well as call the "do_timer()" routine every clocktick + */ +#ifdef CONFIG_CORE_TIMER_IRQ_L1 +__attribute__((l1_text)) +#endif +irqreturn_t timer_interrupt(int irq, void *dev_id); + +static struct clock_event_device clockevent_bfin = { + .name = "bfin_core_timer", + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .shift = 32, + .cpumask = CPU_MASK_CPU0, + .set_next_event = bfin_timer_set_next_event, + .set_mode = bfin_timer_set_mode, +}; + +static struct irqaction bfin_timer_irq = { + .name = "Blackfin Core Timer", + .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, + .handler = timer_interrupt, + .dev_id = &clockevent_bfin, +}; + +irqreturn_t timer_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *evt = dev_id; + evt->event_handler(evt); + return IRQ_HANDLED; +} + +static int __init bfin_clockevent_init(void) +{ + setup_irq(IRQ_CORETMR, &bfin_timer_irq); + bfin_timer_init(); + + clockevent_bfin.mult = div_sc(get_cclk(), NSEC_PER_SEC, clockevent_bfin.shift); + clockevent_bfin.max_delta_ns = clockevent_delta2ns(-1, &clockevent_bfin); + clockevent_bfin.min_delta_ns = clockevent_delta2ns(100, &clockevent_bfin); + clockevents_register_device(&clockevent_bfin); + + return 0; +} + +void __init time_init(void) +{ + time_t secs_since_1970 = (365 * 37 + 9) * 24 * 60 * 60; /* 1 Jan 2007 */ + +#ifdef CONFIG_RTC_DRV_BFIN + /* [#2663] hack to filter junk RTC values that would cause + * userspace to have to deal with time values greater than + * 2^31 seconds (which uClibc cannot cope with yet) + */ + if ((bfin_read_RTC_STAT() & 0xC0000000) == 0xC0000000) { + printk(KERN_NOTICE "bfin-rtc: invalid date; resetting\n"); + bfin_write_RTC_STAT(0); + } +#endif + + /* Initialize xtime. From now on, xtime is updated with timer interrupts */ + xtime.tv_sec = secs_since_1970; + xtime.tv_nsec = 0; + set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, -xtime.tv_nsec); + + bfin_clocksource_init(); + bfin_clockevent_init(); +} diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c index 9bdc8f99183a..eb2352320454 100644 --- a/arch/blackfin/kernel/time.c +++ b/arch/blackfin/kernel/time.c @@ -6,9 +6,10 @@ * Created: * Description: This file contains the bfin-specific time handling details. * Most of the stuff is located in the machine specific files. + * FIXME: (This file is subject for removal) * * Modified: - * Copyright 2004-2006 Analog Devices Inc. + * Copyright 2004-2008 Analog Devices Inc. * * Bugs: Enter bugs at http://blackfin.uclinux.org/ * @@ -35,12 +36,12 @@ #include <linux/irq.h> #include <asm/blackfin.h> +#include <asm/time.h> /* This is an NTP setting */ #define TICK_SIZE (tick_nsec / 1000) -static void time_sched_init(irqreturn_t(*timer_routine) - (int, void *)); +static void time_sched_init(irq_handler_t timer_routine); static unsigned long gettimeoffset(void); static struct irqaction bfin_timer_irq = { @@ -48,23 +49,8 @@ static struct irqaction bfin_timer_irq = { .flags = IRQF_DISABLED }; -/* - * The way that the Blackfin core timer works is: - * - CCLK is divided by a programmable 8-bit pre-scaler (TSCALE) - * - Every time TSCALE ticks, a 32bit is counted down (TCOUNT) - * - * If you take the fastest clock (1ns, or 1GHz to make the math work easier) - * 10ms is 10,000,000 clock ticks, which fits easy into a 32-bit counter - * (32 bit counter is 4,294,967,296ns or 4.2 seconds) so, we don't need - * to use TSCALE, and program it to zero (which is pass CCLK through). - * If you feel like using it, try to keep HZ * TIMESCALE to some - * value that divides easy (like power of 2). - */ - -#define TIME_SCALE 1 - static void -time_sched_init(irqreturn_t(*timer_routine) (int, void *)) +time_sched_init(irq_handler_t timer_routine) { u32 tcount; diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index 56a67ab698c7..5b847070dae5 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -67,6 +67,8 @@ void __init trap_init(void) CSYNC(); } +void *saved_icplb_fault_addr, *saved_dcplb_fault_addr; + int kstack_depth_to_print = 48; static void decode_address(char *buf, unsigned long address) @@ -75,7 +77,7 @@ static void decode_address(char *buf, unsigned long address) struct task_struct *p; struct mm_struct *mm; unsigned long flags, offset; - unsigned int in_exception = bfin_read_IPEND() & 0x10; + unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); #ifdef CONFIG_KALLSYMS unsigned long symsize; @@ -117,7 +119,7 @@ static void decode_address(char *buf, unsigned long address) */ write_lock_irqsave(&tasklist_lock, flags); for_each_process(p) { - mm = (in_exception ? p->mm : get_task_mm(p)); + mm = (in_atomic ? p->mm : get_task_mm(p)); if (!mm) continue; @@ -137,23 +139,36 @@ static void decode_address(char *buf, unsigned long address) /* FLAT does not have its text aligned to the start of * the map while FDPIC ELF does ... */ - if (current->mm && - (address > current->mm->start_code) && - (address < current->mm->end_code)) - offset = address - current->mm->start_code; - else - offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT); - - sprintf(buf, "<0x%p> [ %s + 0x%lx ]", - (void *)address, name, offset); - if (!in_exception) + + /* before we can check flat/fdpic, we need to + * make sure current is valid + */ + if ((unsigned long)current >= FIXED_CODE_START && + !((unsigned long)current & 0x3)) { + if (current->mm && + (address > current->mm->start_code) && + (address < current->mm->end_code)) + offset = address - current->mm->start_code; + else + offset = (address - vma->vm_start) + + (vma->vm_pgoff << PAGE_SHIFT); + + sprintf(buf, "<0x%p> [ %s + 0x%lx ]", + (void *)address, name, offset); + } else + sprintf(buf, "<0x%p> [ %s vma:0x%lx-0x%lx]", + (void *)address, name, + vma->vm_start, vma->vm_end); + + if (!in_atomic) mmput(mm); + goto done; } vml = vml->next; } - if (!in_exception) + if (!in_atomic) mmput(mm); } @@ -506,7 +521,7 @@ asmlinkage void trap_c(struct pt_regs *fp) info.si_signo = sig; info.si_errno = 0; - info.si_addr = (void *)fp->pc; + info.si_addr = (void __user *)fp->pc; force_sig_info(sig, &info, current); trace_buffer_restore(j); @@ -655,21 +670,31 @@ void dump_bfin_process(struct pt_regs *fp) else if (context & 0x8000) printk(KERN_NOTICE "Kernel process context\n"); - if (current->pid && current->mm) { + /* Because we are crashing, and pointers could be bad, we check things + * pretty closely before we use them + */ + if ((unsigned long)current >= FIXED_CODE_START && + !((unsigned long)current & 0x3) && current->pid) { printk(KERN_NOTICE "CURRENT PROCESS:\n"); - printk(KERN_NOTICE "COMM=%s PID=%d\n", - current->comm, current->pid); - - printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" - KERN_NOTICE "BSS = 0x%p-0x%p USER-STACK = 0x%p\n" - KERN_NOTICE "\n", - (void *)current->mm->start_code, - (void *)current->mm->end_code, - (void *)current->mm->start_data, - (void *)current->mm->end_data, - (void *)current->mm->end_data, - (void *)current->mm->brk, - (void *)current->mm->start_stack); + if (current->comm >= (char *)FIXED_CODE_START) + printk(KERN_NOTICE "COMM=%s PID=%d\n", + current->comm, current->pid); + else + printk(KERN_NOTICE "COMM= invalid\n"); + + if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START) + printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" + KERN_NOTICE " BSS = 0x%p-0x%p USER-STACK = 0x%p\n" + KERN_NOTICE "\n", + (void *)current->mm->start_code, + (void *)current->mm->end_code, + (void *)current->mm->start_data, + (void *)current->mm->end_data, + (void *)current->mm->end_data, + (void *)current->mm->brk, + (void *)current->mm->start_stack); + else + printk(KERN_NOTICE "invalid mm\n"); } else printk(KERN_NOTICE "\n" KERN_NOTICE "No Valid process in current context\n"); @@ -680,10 +705,7 @@ void dump_bfin_mem(struct pt_regs *fp) unsigned short *addr, *erraddr, val = 0, err = 0; char sti = 0, buf[6]; - if (unlikely((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR)) - erraddr = (void *)fp->pc; - else - erraddr = (void *)fp->retx; + erraddr = (void *)fp->pc; printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr); @@ -807,9 +829,9 @@ unlock: if (((long)fp->seqstat & SEQSTAT_EXCAUSE) && (((long)fp->seqstat & SEQSTAT_EXCAUSE) != VEC_HWERR)) { - decode_address(buf, bfin_read_DCPLB_FAULT_ADDR()); + decode_address(buf, saved_dcplb_fault_addr); printk(KERN_NOTICE "DCPLB_FAULT_ADDR: %s\n", buf); - decode_address(buf, bfin_read_ICPLB_FAULT_ADDR()); + decode_address(buf, saved_icplb_fault_addr); printk(KERN_NOTICE "ICPLB_FAULT_ADDR: %s\n", buf); } @@ -917,8 +939,8 @@ void panic_cplb_error(int cplb_panic, struct pt_regs *fp) oops_in_progress = 1; - printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", (void *)bfin_read_DCPLB_FAULT_ADDR()); - printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", (void *)bfin_read_ICPLB_FAULT_ADDR()); + printk(KERN_EMERG "DCPLB_FAULT_ADDR=%p\n", saved_dcplb_fault_addr); + printk(KERN_EMERG "ICPLB_FAULT_ADDR=%p\n", saved_icplb_fault_addr); dump_bfin_process(fp); dump_bfin_mem(fp); show_regs(fp); diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S index cb01a9de2680..3ecc64cab3be 100644 --- a/arch/blackfin/kernel/vmlinux.lds.S +++ b/arch/blackfin/kernel/vmlinux.lds.S @@ -56,6 +56,10 @@ SECTIONS *(.text.*) *(.fixup) +#if !L1_CODE_LENGTH + *(.l1.text) +#endif + . = ALIGN(16); ___start___ex_table = .; *(__ex_table) @@ -73,6 +77,12 @@ SECTIONS ___bss_start = .; *(.bss .bss.*) *(COMMON) +#if !L1_DATA_A_LENGTH + *(.l1.bss) +#endif +#if !L1_DATA_B_LENGTH + *(.l1.bss.B) +#endif ___bss_stop = .; } @@ -83,6 +93,15 @@ SECTIONS . = ALIGN(32); *(.data.cacheline_aligned) +#if !L1_DATA_A_LENGTH + . = ALIGN(32); + *(.data_l1.cacheline_aligned) + *(.l1.data) +#endif +#if !L1_DATA_B_LENGTH + *(.l1.data.B) +#endif + DATA_DATA *(.data.*) CONSTRUCTORS @@ -147,64 +166,43 @@ SECTIONS __l1_lma_start = .; -#if L1_CODE_LENGTH -# define LDS_L1_CODE *(.l1.text) -#else -# define LDS_L1_CODE -#endif .text_l1 L1_CODE_START : AT(LOADADDR(.init.ramfs) + SIZEOF(.init.ramfs)) { . = ALIGN(4); __stext_l1 = .; - LDS_L1_CODE + *(.l1.text) . = ALIGN(4); __etext_l1 = .; } -#if L1_DATA_A_LENGTH -# define LDS_L1_A_DATA *(.l1.data) -# define LDS_L1_A_BSS *(.l1.bss) -# define LDS_L1_A_CACHE *(.data_l1.cacheline_aligned) -#else -# define LDS_L1_A_DATA -# define LDS_L1_A_BSS -# define LDS_L1_A_CACHE -#endif .data_l1 L1_DATA_A_START : AT(LOADADDR(.text_l1) + SIZEOF(.text_l1)) { . = ALIGN(4); __sdata_l1 = .; - LDS_L1_A_DATA + *(.l1.data) __edata_l1 = .; . = ALIGN(4); __sbss_l1 = .; - LDS_L1_A_BSS + *(.l1.bss) . = ALIGN(32); - LDS_L1_A_CACHE + *(.data_l1.cacheline_aligned) . = ALIGN(4); __ebss_l1 = .; } -#if L1_DATA_B_LENGTH -# define LDS_L1_B_DATA *(.l1.data.B) -# define LDS_L1_B_BSS *(.l1.bss.B) -#else -# define LDS_L1_B_DATA -# define LDS_L1_B_BSS -#endif .data_b_l1 L1_DATA_B_START : AT(LOADADDR(.data_l1) + SIZEOF(.data_l1)) { . = ALIGN(4); __sdata_b_l1 = .; - LDS_L1_B_DATA + *(.l1.data.B) __edata_b_l1 = .; . = ALIGN(4); __sbss_b_l1 = .; - LDS_L1_B_BSS + *(.l1.bss.B) . = ALIGN(4); __ebss_b_l1 = .; @@ -223,8 +221,6 @@ SECTIONS DWARF_DEBUG - NOTES - /DISCARD/ : { EXIT_TEXT |