From a2f526994e92ea54be181efccda261c4b1a6ae8d Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 1 Jul 2011 23:04:40 -0400 Subject: microblaze/irqs: Do not trace arch_local_{*,irq_*} functions Do not trace arch_local_save_flags(), arch_local_irq_*() and friends. Although they are marked inline, gcc may still make a function out of them and add it to the pool of functions that are traced by the function tracer. This can cause undesirable results (kernel panic, triple faults, etc). Add the notrace notation to prevent them from ever being traced. Cc: Michal Simek Signed-off-by: Steven Rostedt --- arch/microblaze/include/asm/irqflags.h | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/include/asm/irqflags.h b/arch/microblaze/include/asm/irqflags.h index c4532f032b3..c9a6262832c 100644 --- a/arch/microblaze/include/asm/irqflags.h +++ b/arch/microblaze/include/asm/irqflags.h @@ -14,7 +14,7 @@ #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR -static inline unsigned long arch_local_irq_save(void) +static inline notrace unsigned long arch_local_irq_save(void) { unsigned long flags; asm volatile(" msrclr %0, %1 \n" @@ -25,7 +25,7 @@ static inline unsigned long arch_local_irq_save(void) return flags; } -static inline void arch_local_irq_disable(void) +static inline notrace void arch_local_irq_disable(void) { /* this uses r0 without declaring it - is that correct? */ asm volatile(" msrclr r0, %0 \n" @@ -35,7 +35,7 @@ static inline void arch_local_irq_disable(void) : "memory"); } -static inline void arch_local_irq_enable(void) +static inline notrace void arch_local_irq_enable(void) { /* this uses r0 without declaring it - is that correct? */ asm volatile(" msrset r0, %0 \n" @@ -47,7 +47,7 @@ static inline void arch_local_irq_enable(void) #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ -static inline unsigned long arch_local_irq_save(void) +static inline notrace unsigned long arch_local_irq_save(void) { unsigned long flags, tmp; asm volatile (" mfs %0, rmsr \n" @@ -61,7 +61,7 @@ static inline unsigned long arch_local_irq_save(void) return flags; } -static inline void arch_local_irq_disable(void) +static inline notrace void arch_local_irq_disable(void) { unsigned long tmp; asm volatile(" mfs %0, rmsr \n" @@ -74,7 +74,7 @@ static inline void arch_local_irq_disable(void) : "memory"); } -static inline void arch_local_irq_enable(void) +static inline notrace void arch_local_irq_enable(void) { unsigned long tmp; asm volatile(" mfs %0, rmsr \n" @@ -89,7 +89,7 @@ static inline void arch_local_irq_enable(void) #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ -static inline unsigned long arch_local_save_flags(void) +static inline notrace unsigned long arch_local_save_flags(void) { unsigned long flags; asm volatile(" mfs %0, rmsr \n" @@ -100,7 +100,7 @@ static inline unsigned long arch_local_save_flags(void) return flags; } -static inline void arch_local_irq_restore(unsigned long flags) +static inline notrace void arch_local_irq_restore(unsigned long flags) { asm volatile(" mts rmsr, %0 \n" " nop \n" @@ -109,12 +109,12 @@ static inline void arch_local_irq_restore(unsigned long flags) : "memory"); } -static inline bool arch_irqs_disabled_flags(unsigned long flags) +static inline notrace bool arch_irqs_disabled_flags(unsigned long flags) { return (flags & MSR_IE) == 0; } -static inline bool arch_irqs_disabled(void) +static inline notrace bool arch_irqs_disabled(void) { return arch_irqs_disabled_flags(arch_local_save_flags()); } -- cgit v1.2.3-70-g09d2 From c11389406f19e4bddc7b347e5259aebda02b23f1 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Fri, 20 May 2011 09:02:13 +0200 Subject: microblaze: Fix unaligned value saving to the stack for system with MMU Several registers weren't saved correctly to the stack. Unaligned expection for system with MMU stores value in ex_tmp_data_loc_X address which is load to registers r3. The next step is to move this value from r3 to a destination register which caused unaligned exception. For several registers this value was directly moved to the register. For example for r28: by "or r28, r0, r3" but register r28 was rewritten when kernel returns from exception handler by value saved on stack. This patch changed r3 saving to the correct address on the stack. For example for r28: by "swi r3, r1, 4 * 28" When kernel returns from the exception handler, correct value is restored. Signed-off-by: Michal Simek --- arch/microblaze/kernel/hw_exception_handler.S | 56 +++++++++++++-------------- 1 file changed, 28 insertions(+), 28 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S index 56572e923a8..e62be837960 100644 --- a/arch/microblaze/kernel/hw_exception_handler.S +++ b/arch/microblaze/kernel/hw_exception_handler.S @@ -1113,23 +1113,23 @@ lw_r10_vm: R3_TO_LWREG_VM_V (10); lw_r11_vm: R3_TO_LWREG_VM_V (11); lw_r12_vm: R3_TO_LWREG_VM_V (12); lw_r13_vm: R3_TO_LWREG_VM_V (13); -lw_r14_vm: R3_TO_LWREG_VM (14); +lw_r14_vm: R3_TO_LWREG_VM_V (14); lw_r15_vm: R3_TO_LWREG_VM_V (15); -lw_r16_vm: R3_TO_LWREG_VM (16); +lw_r16_vm: R3_TO_LWREG_VM_V (16); lw_r17_vm: R3_TO_LWREG_VM_V (17); lw_r18_vm: R3_TO_LWREG_VM_V (18); -lw_r19_vm: R3_TO_LWREG_VM (19); -lw_r20_vm: R3_TO_LWREG_VM (20); -lw_r21_vm: R3_TO_LWREG_VM (21); -lw_r22_vm: R3_TO_LWREG_VM (22); -lw_r23_vm: R3_TO_LWREG_VM (23); -lw_r24_vm: R3_TO_LWREG_VM (24); -lw_r25_vm: R3_TO_LWREG_VM (25); -lw_r26_vm: R3_TO_LWREG_VM (26); -lw_r27_vm: R3_TO_LWREG_VM (27); -lw_r28_vm: R3_TO_LWREG_VM (28); -lw_r29_vm: R3_TO_LWREG_VM (29); -lw_r30_vm: R3_TO_LWREG_VM (30); +lw_r19_vm: R3_TO_LWREG_VM_V (19); +lw_r20_vm: R3_TO_LWREG_VM_V (20); +lw_r21_vm: R3_TO_LWREG_VM_V (21); +lw_r22_vm: R3_TO_LWREG_VM_V (22); +lw_r23_vm: R3_TO_LWREG_VM_V (23); +lw_r24_vm: R3_TO_LWREG_VM_V (24); +lw_r25_vm: R3_TO_LWREG_VM_V (25); +lw_r26_vm: R3_TO_LWREG_VM_V (26); +lw_r27_vm: R3_TO_LWREG_VM_V (27); +lw_r28_vm: R3_TO_LWREG_VM_V (28); +lw_r29_vm: R3_TO_LWREG_VM_V (29); +lw_r30_vm: R3_TO_LWREG_VM_V (30); lw_r31_vm: R3_TO_LWREG_VM_V (31); sw_table_vm: @@ -1147,23 +1147,23 @@ sw_r10_vm: SWREG_TO_R3_VM_V (10); sw_r11_vm: SWREG_TO_R3_VM_V (11); sw_r12_vm: SWREG_TO_R3_VM_V (12); sw_r13_vm: SWREG_TO_R3_VM_V (13); -sw_r14_vm: SWREG_TO_R3_VM (14); +sw_r14_vm: SWREG_TO_R3_VM_V (14); sw_r15_vm: SWREG_TO_R3_VM_V (15); -sw_r16_vm: SWREG_TO_R3_VM (16); +sw_r16_vm: SWREG_TO_R3_VM_V (16); sw_r17_vm: SWREG_TO_R3_VM_V (17); sw_r18_vm: SWREG_TO_R3_VM_V (18); -sw_r19_vm: SWREG_TO_R3_VM (19); -sw_r20_vm: SWREG_TO_R3_VM (20); -sw_r21_vm: SWREG_TO_R3_VM (21); -sw_r22_vm: SWREG_TO_R3_VM (22); -sw_r23_vm: SWREG_TO_R3_VM (23); -sw_r24_vm: SWREG_TO_R3_VM (24); -sw_r25_vm: SWREG_TO_R3_VM (25); -sw_r26_vm: SWREG_TO_R3_VM (26); -sw_r27_vm: SWREG_TO_R3_VM (27); -sw_r28_vm: SWREG_TO_R3_VM (28); -sw_r29_vm: SWREG_TO_R3_VM (29); -sw_r30_vm: SWREG_TO_R3_VM (30); +sw_r19_vm: SWREG_TO_R3_VM_V (19); +sw_r20_vm: SWREG_TO_R3_VM_V (20); +sw_r21_vm: SWREG_TO_R3_VM_V (21); +sw_r22_vm: SWREG_TO_R3_VM_V (22); +sw_r23_vm: SWREG_TO_R3_VM_V (23); +sw_r24_vm: SWREG_TO_R3_VM_V (24); +sw_r25_vm: SWREG_TO_R3_VM_V (25); +sw_r26_vm: SWREG_TO_R3_VM_V (26); +sw_r27_vm: SWREG_TO_R3_VM_V (27); +sw_r28_vm: SWREG_TO_R3_VM_V (28); +sw_r29_vm: SWREG_TO_R3_VM_V (29); +sw_r30_vm: SWREG_TO_R3_VM_V (30); sw_r31_vm: SWREG_TO_R3_VM_V (31); #endif /* CONFIG_MMU */ -- cgit v1.2.3-70-g09d2 From 504a84c4806af58ae842b8716f603baad2757dd9 Mon Sep 17 00:00:00 2001 From: Mathias Krause Date: Wed, 8 Jun 2011 14:30:05 +0200 Subject: microblaze: Remove duplicated prototype of start_thread() The prototype for start_thread() is already present in the MMU/NOMMU independent part of the file. Remove the duplicate. Signed-off-by: Mathias Krause Signed-off-by: Michal Simek --- arch/microblaze/include/asm/processor.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index aed2a6be8e2..7283bfb2f7e 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -125,9 +125,6 @@ struct thread_struct { .pgdir = swapper_pg_dir, \ } -/* Do necessary setup to start up a newly executed thread. */ -void start_thread(struct pt_regs *regs, - unsigned long pc, unsigned long usp); /* Free all resources held by a thread. */ extern inline void release_thread(struct task_struct *dead_task) -- cgit v1.2.3-70-g09d2 From a0ec99bda8d42001dc37191f1282a401d2f6e4e1 Mon Sep 17 00:00:00 2001 From: Mathias Krause Date: Fri, 10 Jun 2011 15:09:59 +0200 Subject: microblaze: exec: Remove redundant set_fs(USER_DS) The address limit is already set in flush_old_exec() so this set_fs(USER_DS) is redundant. Signed-off-by: Mathias Krause --- arch/microblaze/kernel/process.c | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index 968648a81c1..dbb812421d8 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -237,7 +237,6 @@ unsigned long get_wchan(struct task_struct *p) /* Set up a thread for executing a new program */ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp) { - set_fs(USER_DS); regs->pc = pc; regs->r1 = usp; regs->pt_mode = 0; -- cgit v1.2.3-70-g09d2 From 5db34eb92f5699361de355dcd7958fdd2a9fb98a Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Tue, 12 Jul 2011 12:36:29 +0200 Subject: microblaze: trivial: Fix typo fault descrtiption -> description Signed-off-by: Michal Simek --- arch/microblaze/include/asm/pvr.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/include/asm/pvr.h b/arch/microblaze/include/asm/pvr.h index a10bec62e85..56a80e45c4e 100644 --- a/arch/microblaze/include/asm/pvr.h +++ b/arch/microblaze/include/asm/pvr.h @@ -111,7 +111,7 @@ struct pvr_s { /* Target family PVR mask */ #define PVR10_TARGET_FAMILY_MASK 0xFF000000 -/* MMU descrtiption */ +/* MMU description */ #define PVR11_USE_MMU 0xC0000000 #define PVR11_MMU_ITLB_SIZE 0x38000000 #define PVR11_MMU_DTLB_SIZE 0x07000000 -- cgit v1.2.3-70-g09d2 From 8904976e8ca45be3ec75acc71f5d855ef671a079 Mon Sep 17 00:00:00 2001 From: "John A. Williams" Date: Tue, 24 May 2011 18:57:11 +1000 Subject: microblaze: Unprivileged stream instruction awareness Add cpuinfo support for the new MicroBlaze option permitting userspace (unprivileged) access to the streaming instructions (FSL / AXI-stream). Emit a noisy warning at bootup if this is enabled, because bad user code can potentially lockup the CPU. Signed-off-by: John A. Williams Signed-off-by: Michal Simek --- arch/microblaze/include/asm/cpuinfo.h | 1 + arch/microblaze/include/asm/pvr.h | 3 ++- arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c | 1 + arch/microblaze/kernel/cpu/cpuinfo-static.c | 1 + arch/microblaze/kernel/cpu/cpuinfo.c | 4 ++++ arch/microblaze/kernel/cpu/mb.c | 4 ++++ 6 files changed, 13 insertions(+), 1 deletion(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/include/asm/cpuinfo.h b/arch/microblaze/include/asm/cpuinfo.h index d8f013347a9..7d6831ac8a4 100644 --- a/arch/microblaze/include/asm/cpuinfo.h +++ b/arch/microblaze/include/asm/cpuinfo.h @@ -38,6 +38,7 @@ struct cpuinfo { u32 use_exc; u32 ver_code; u32 mmu; + u32 mmu_privins; u32 endian; /* CPU caches */ diff --git a/arch/microblaze/include/asm/pvr.h b/arch/microblaze/include/asm/pvr.h index 56a80e45c4e..4bbdb4c03b5 100644 --- a/arch/microblaze/include/asm/pvr.h +++ b/arch/microblaze/include/asm/pvr.h @@ -117,10 +117,10 @@ struct pvr_s { #define PVR11_MMU_DTLB_SIZE 0x07000000 #define PVR11_MMU_TLB_ACCESS 0x00C00000 #define PVR11_MMU_ZONES 0x003C0000 +#define PVR11_MMU_PRIVINS 0x00010000 /* MSR Reset value PVR mask */ #define PVR11_MSR_RESET_VALUE_MASK 0x000007FF - /* PVR access macros */ #define PVR_IS_FULL(_pvr) (_pvr.pvr[0] & PVR0_PVR_FULL_MASK) #define PVR_USE_BARREL(_pvr) (_pvr.pvr[0] & PVR0_USE_BARREL_MASK) @@ -216,6 +216,7 @@ struct pvr_s { #define PVR_MMU_DTLB_SIZE(_pvr) (_pvr.pvr[11] & PVR11_MMU_DTLB_SIZE) #define PVR_MMU_TLB_ACCESS(_pvr) (_pvr.pvr[11] & PVR11_MMU_TLB_ACCESS) #define PVR_MMU_ZONES(_pvr) (_pvr.pvr[11] & PVR11_MMU_ZONES) +#define PVR_MMU_PRIVINS(pvr) (pvr.pvr[11] & PVR11_MMU_PRIVINS) /* endian */ #define PVR_ENDIAN(_pvr) (_pvr.pvr[0] & PVR0_ENDI) diff --git a/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c b/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c index f70a6047f08..916aaedf194 100644 --- a/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c +++ b/arch/microblaze/kernel/cpu/cpuinfo-pvr-full.c @@ -72,6 +72,7 @@ void set_cpuinfo_pvr_full(struct cpuinfo *ci, struct device_node *cpu) CI(pvr_user2, USER2); CI(mmu, USE_MMU); + CI(mmu_privins, MMU_PRIVINS); CI(endian, ENDIAN); CI(use_icache, USE_ICACHE); diff --git a/arch/microblaze/kernel/cpu/cpuinfo-static.c b/arch/microblaze/kernel/cpu/cpuinfo-static.c index b16b994ca3d..592bb2e838c 100644 --- a/arch/microblaze/kernel/cpu/cpuinfo-static.c +++ b/arch/microblaze/kernel/cpu/cpuinfo-static.c @@ -119,6 +119,7 @@ void __init set_cpuinfo_static(struct cpuinfo *ci, struct device_node *cpu) ci->pvr_user2 = fcpu(cpu, "xlnx,pvr-user2"); ci->mmu = fcpu(cpu, "xlnx,use-mmu"); + ci->mmu_privins = fcpu(cpu, "xlnx,mmu-privileged-instr"); ci->endian = fcpu(cpu, "xlnx,endianness"); ci->ver_code = 0; diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c index c1640c52711..44394d80a68 100644 --- a/arch/microblaze/kernel/cpu/cpuinfo.c +++ b/arch/microblaze/kernel/cpu/cpuinfo.c @@ -88,4 +88,8 @@ void __init setup_cpuinfo(void) printk(KERN_WARNING "%s: Unsupported PVR setting\n", __func__); set_cpuinfo_static(&cpuinfo, cpu); } + + if (cpuinfo.mmu_privins) + printk(KERN_WARNING "%s: Stream instructions enabled" + " - USERSPACE CAN LOCK THIS KERNEL!\n", __func__); } diff --git a/arch/microblaze/kernel/cpu/mb.c b/arch/microblaze/kernel/cpu/mb.c index b4048af0261..0afebaebb5b 100644 --- a/arch/microblaze/kernel/cpu/mb.c +++ b/arch/microblaze/kernel/cpu/mb.c @@ -97,6 +97,10 @@ static int show_cpuinfo(struct seq_file *m, void *v) (cpuinfo.use_exc & PVR2_FPU_EXC_MASK) ? "fpu " : "", (cpuinfo.use_exc & PVR2_USE_FSL_EXC) ? "fsl " : ""); + count += seq_printf(m, + "Stream-insns:\t%sprivileged\n", + cpuinfo.mmu_privins ? "un" : ""); + if (cpuinfo.use_icache) count += seq_printf(m, "Icache:\t\t%ukB\tline length:\t%dB\n", -- cgit v1.2.3-70-g09d2 From 95ce618f85a86a7383c1a3e39278be3de84b1b99 Mon Sep 17 00:00:00 2001 From: "John A. Williams" Date: Tue, 24 May 2011 18:59:45 +1000 Subject: microblaze: Standardise cpuinfo output for cache policy The current cpuinfo output for the cache policy has no leading tag:, making it difficult to parse. Add a leaning "Dcache-policy:" tag to this field. Signed-off-by: John A. Williams --- arch/microblaze/kernel/cpu/mb.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/kernel/cpu/mb.c b/arch/microblaze/kernel/cpu/mb.c index 0afebaebb5b..7b5dca7ed39 100644 --- a/arch/microblaze/kernel/cpu/mb.c +++ b/arch/microblaze/kernel/cpu/mb.c @@ -114,10 +114,11 @@ static int show_cpuinfo(struct seq_file *m, void *v) "Dcache:\t\t%ukB\tline length:\t%dB\n", cpuinfo.dcache_size >> 10, cpuinfo.dcache_line_length); + seq_printf(m, "Dcache-Policy:\t"); if (cpuinfo.dcache_wb) - count += seq_printf(m, "\t\twrite-back\n"); + count += seq_printf(m, "write-back\n"); else - count += seq_printf(m, "\t\twrite-through\n"); + count += seq_printf(m, "write-through\n"); } else count += seq_printf(m, "Dcache:\t\tno\n"); -- cgit v1.2.3-70-g09d2 From e721a45fbed13a52093d2cc1962dbb8a754462ea Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Mon, 4 Apr 2011 15:45:06 +0200 Subject: microblaze: Get early printk console earlier 1. Register early console as standard console 2. Enable CON_BOOT console flag to ensure auto-unregistering by the kernel 3. remap_early_printk function remap physical console baseaddr to virtual space Usage specific function for console remap is done after memory initialization with IRQ turn off that's why there is not necessary to protect it. The reason for remapping is that the kernel use TLB 63 for 1:1 address mapping to be able to use console in very early boot-up phase. But allocating one TLB just for console caused performance degression that's why ioremaps create new mapping and TLB 63 is automatically released and ready to use. Signed-off-by: Michal Simek CC: Russell King CC: Ralf Baechle CC: Ingo Molnar CC: Alan Cox CC: CC: Arnd Bergmann --- arch/microblaze/include/asm/setup.h | 1 + arch/microblaze/kernel/early_printk.c | 20 ++++++++++++++++---- arch/microblaze/kernel/setup.c | 5 +++++ 3 files changed, 22 insertions(+), 4 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/include/asm/setup.h b/arch/microblaze/include/asm/setup.h index 8f3968971e4..904e5ef6a11 100644 --- a/arch/microblaze/include/asm/setup.h +++ b/arch/microblaze/include/asm/setup.h @@ -23,6 +23,7 @@ extern char cmd_line[COMMAND_LINE_SIZE]; void early_printk(const char *fmt, ...); int setup_early_printk(char *opt); +void remap_early_printk(void); void disable_early_printk(void); #if defined(CONFIG_EARLY_PRINTK) diff --git a/arch/microblaze/kernel/early_printk.c b/arch/microblaze/kernel/early_printk.c index c3616a080eb..8f8384e98bf 100644 --- a/arch/microblaze/kernel/early_printk.c +++ b/arch/microblaze/kernel/early_printk.c @@ -60,7 +60,7 @@ static void early_printk_uartlite_write(struct console *unused, static struct console early_serial_uartlite_console = { .name = "earlyser", .write = early_printk_uartlite_write, - .flags = CON_PRINTBUFFER, + .flags = CON_PRINTBUFFER | CON_BOOT, .index = -1, }; #endif /* CONFIG_SERIAL_UARTLITE_CONSOLE */ @@ -104,7 +104,7 @@ static void early_printk_uart16550_write(struct console *unused, static struct console early_serial_uart16550_console = { .name = "earlyser", .write = early_printk_uart16550_write, - .flags = CON_PRINTBUFFER, + .flags = CON_PRINTBUFFER | CON_BOOT, .index = -1, }; #endif /* CONFIG_SERIAL_8250_CONSOLE */ @@ -141,7 +141,7 @@ int __init setup_early_printk(char *opt) early_printk("early_printk_console is enabled at 0x%08x\n", base_addr); - /* register_console(early_console); */ + register_console(early_console); return 0; } @@ -160,7 +160,7 @@ int __init setup_early_printk(char *opt) early_printk("early_printk_console is enabled at 0x%08x\n", base_addr); - /* register_console(early_console); */ + register_console(early_console); return 0; } @@ -169,6 +169,18 @@ int __init setup_early_printk(char *opt) return 1; } +/* Remap early console to virtual address and do not allocate one TLB + * only for early console because of performance degression */ +void __init remap_early_printk(void) +{ + if (!early_console_initialized || !early_console) + return; + printk(KERN_INFO "early_printk_console remaping from 0x%x to ", + base_addr); + base_addr = (u32) ioremap(base_addr, PAGE_SIZE); + printk(KERN_CONT "0x%x\n", base_addr); +} + void __init disable_early_printk(void) { if (!early_console_initialized || !early_console) diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c index 8e2c09b7ff2..0e654a12d37 100644 --- a/arch/microblaze/kernel/setup.c +++ b/arch/microblaze/kernel/setup.c @@ -59,6 +59,11 @@ void __init setup_arch(char **cmdline_p) setup_memory(); +#ifdef CONFIG_EARLY_PRINTK + /* remap early console to virtual address */ + remap_early_printk(); +#endif + xilinx_pci_init(); #if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER) -- cgit v1.2.3-70-g09d2 From 2aa8e37596933a43fc3e46e1e385045635674429 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 14 Apr 2011 11:48:43 +0200 Subject: microblaze: Simplify early console binding from DT Recognize early Linux console from chosen - linux,stdout-path instead of detecting the first console with appropriate compatible strings. This patch solved the problem on system with multiple consoles. Signed-off-by: Michal Simek --- arch/microblaze/include/asm/prom.h | 8 ++- arch/microblaze/kernel/early_printk.c | 48 ++++++++---------- arch/microblaze/kernel/prom.c | 96 +++++++++++++++-------------------- 3 files changed, 70 insertions(+), 82 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/include/asm/prom.h b/arch/microblaze/include/asm/prom.h index d0890d36ef6..34c4e8b2780 100644 --- a/arch/microblaze/include/asm/prom.h +++ b/arch/microblaze/include/asm/prom.h @@ -26,8 +26,12 @@ #define HAVE_ARCH_DEVTREE_FIXUPS /* Other Prototypes */ -extern int early_uartlite_console(void); -extern int early_uart16550_console(void); +enum early_consoles { + UARTLITE = 1, + UART16550 = 2, +}; + +extern int of_early_console(void *version); #ifdef CONFIG_PCI /* diff --git a/arch/microblaze/kernel/early_printk.c b/arch/microblaze/kernel/early_printk.c index 8f8384e98bf..e21390da0a4 100644 --- a/arch/microblaze/kernel/early_printk.c +++ b/arch/microblaze/kernel/early_printk.c @@ -127,45 +127,41 @@ void early_printk(const char *fmt, ...) int __init setup_early_printk(char *opt) { + int version = 0; + if (early_console_initialized) return 1; -#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE - base_addr = early_uartlite_console(); + base_addr = of_early_console(&version); if (base_addr) { - early_console_initialized = 1; #ifdef CONFIG_MMU early_console_reg_tlb_alloc(base_addr); #endif - early_console = &early_serial_uartlite_console; - early_printk("early_printk_console is enabled at 0x%08x\n", - base_addr); - - register_console(early_console); - - return 0; - } -#endif /* CONFIG_SERIAL_UARTLITE_CONSOLE */ - + switch (version) { +#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE + case UARTLITE: + printk(KERN_INFO "Early console on uartlite " + "at 0x%08x\n", base_addr); + early_console = &early_serial_uartlite_console; + break; +#endif #ifdef CONFIG_SERIAL_8250_CONSOLE - base_addr = early_uart16550_console(); - base_addr &= ~3; /* clear register offset */ - if (base_addr) { - early_console_initialized = 1; -#ifdef CONFIG_MMU - early_console_reg_tlb_alloc(base_addr); + case UART16550: + printk(KERN_INFO "Early console on uart16650 " + "at 0x%08x\n", base_addr); + early_console = &early_serial_uart16550_console; + break; #endif - early_console = &early_serial_uart16550_console; - - early_printk("early_printk_console is enabled at 0x%08x\n", - base_addr); + default: + printk(KERN_INFO "Unsupported early console %d\n", + version); + return 1; + } register_console(early_console); - + early_console_initialized = 1; return 0; } -#endif /* CONFIG_SERIAL_8250_CONSOLE */ - return 1; } diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index b15cc219b1d..18d9371d9b2 100644 --- a/arch/microblaze/kernel/prom.c +++ b/arch/microblaze/kernel/prom.c @@ -53,69 +53,57 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) } #ifdef CONFIG_EARLY_PRINTK -/* MS this is Microblaze specifig function */ -static int __init early_init_dt_scan_serial(unsigned long node, - const char *uname, int depth, void *data) -{ - unsigned long l; - char *p; - const __be32 *addr; - - pr_debug("search \"serial\", depth: %d, uname: %s\n", depth, uname); - -/* find all serial nodes */ - if (strncmp(uname, "serial", 6) != 0) - return 0; - -/* find compatible node with uartlite */ - p = of_get_flat_dt_prop(node, "compatible", &l); - if ((strncmp(p, "xlnx,xps-uartlite", 17) != 0) && - (strncmp(p, "xlnx,opb-uartlite", 17) != 0) && - (strncmp(p, "xlnx,axi-uartlite", 17) != 0)) - return 0; - - addr = of_get_flat_dt_prop(node, "reg", &l); - return be32_to_cpup(addr); /* return address */ -} +char *stdout; -/* this function is looking for early uartlite console - Microblaze specific */ -int __init early_uartlite_console(void) -{ - return of_scan_flat_dt(early_init_dt_scan_serial, NULL); -} - -/* MS this is Microblaze specifig function */ -static int __init early_init_dt_scan_serial_full(unsigned long node, +int __init early_init_dt_scan_chosen_serial(unsigned long node, const char *uname, int depth, void *data) { unsigned long l; char *p; - unsigned int addr; - - pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname); - -/* find all serial nodes */ - if (strncmp(uname, "serial", 6) != 0) - return 0; - early_init_dt_check_for_initrd(node); - -/* find compatible node with uartlite */ - p = of_get_flat_dt_prop(node, "compatible", &l); - - if ((strncmp(p, "xlnx,xps-uart16550", 18) != 0) && - (strncmp(p, "xlnx,axi-uart16550", 18) != 0)) - return 0; - - addr = *(u32 *)of_get_flat_dt_prop(node, "reg", &l); - addr += *(u32 *)of_get_flat_dt_prop(node, "reg-offset", &l); - return be32_to_cpu(addr); /* return address */ + pr_debug("%s: depth: %d, uname: %s\n", __func__, depth, uname); + + if (depth == 1 && (strcmp(uname, "chosen") == 0 || + strcmp(uname, "chosen@0") == 0)) { + p = of_get_flat_dt_prop(node, "linux,stdout-path", &l); + if (p != NULL && l > 0) + stdout = p; /* store pointer to stdout-path */ + } + + if (stdout && strstr(stdout, uname)) { + p = of_get_flat_dt_prop(node, "compatible", &l); + pr_debug("Compatible string: %s\n", p); + + if ((strncmp(p, "xlnx,xps-uart16550", 18) == 0) || + (strncmp(p, "xlnx,axi-uart16550", 18) == 0)) { + unsigned int addr; + + *(u32 *)data = UART16550; + + addr = *(u32 *)of_get_flat_dt_prop(node, "reg", &l); + addr += *(u32 *)of_get_flat_dt_prop(node, + "reg-offset", &l); + /* clear register offset */ + return be32_to_cpu(addr) & ~3; + } + if ((strncmp(p, "xlnx,xps-uartlite", 17) == 0) || + (strncmp(p, "xlnx,opb-uartlite", 17) == 0) || + (strncmp(p, "xlnx,axi-uartlite", 17) == 0)) { + unsigned int *addrp; + + *(u32 *)data = UARTLITE; + + addrp = of_get_flat_dt_prop(node, "reg", &l); + return be32_to_cpup(addrp); /* return address */ + } + } + return 0; } -/* this function is looking for early uartlite console - Microblaze specific */ -int __init early_uart16550_console(void) +/* this function is looking for early console - Microblaze specific */ +int __init of_early_console(void *version) { - return of_scan_flat_dt(early_init_dt_scan_serial_full, NULL); + return of_scan_flat_dt(early_init_dt_scan_chosen_serial, version); } #endif -- cgit v1.2.3-70-g09d2 From ca12adc8ca6814d1949fcc6d83c1adda6dc9e2ef Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Wed, 6 Apr 2011 13:06:45 +0200 Subject: microblaze: Add support for early console on mdm Support mdm early console: - extend time for retries - add mdm compatible property Signed-off-by: Michal Simek --- arch/microblaze/kernel/early_printk.c | 2 +- arch/microblaze/kernel/prom.c | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/kernel/early_printk.c b/arch/microblaze/kernel/early_printk.c index e21390da0a4..d26d92d4775 100644 --- a/arch/microblaze/kernel/early_printk.c +++ b/arch/microblaze/kernel/early_printk.c @@ -35,7 +35,7 @@ static void early_printk_uartlite_putc(char c) * we'll never timeout on a working UART. */ - unsigned retries = 10000; + unsigned retries = 1000000; /* read status bit - 0x8 offset */ while (--retries && (in_be32(base_addr + 8) & (1 << 3))) ; diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index 18d9371d9b2..977484add21 100644 --- a/arch/microblaze/kernel/prom.c +++ b/arch/microblaze/kernel/prom.c @@ -88,7 +88,8 @@ int __init early_init_dt_scan_chosen_serial(unsigned long node, } if ((strncmp(p, "xlnx,xps-uartlite", 17) == 0) || (strncmp(p, "xlnx,opb-uartlite", 17) == 0) || - (strncmp(p, "xlnx,axi-uartlite", 17) == 0)) { + (strncmp(p, "xlnx,axi-uartlite", 17) == 0) || + (strncmp(p, "xlnx,mdm", 8) == 0)) { unsigned int *addrp; *(u32 *)data = UARTLITE; -- cgit v1.2.3-70-g09d2 From c9d761b7c4b658a937a941aea2781f511a0ff3ec Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Tue, 12 Jul 2011 15:24:06 +0200 Subject: microblaze: PCI fix typo fault in of_node pointer moving into pci_bus Bug introduces in: powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controller (sha1: b5d937de0367d26f65b9af1aef5f2c34c1939be0) Signed-off-by: Michal Simek --- arch/microblaze/pci/pci_32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/pci/pci_32.c b/arch/microblaze/pci/pci_32.c index 92728a6cfd8..9fafb0dd9c2 100644 --- a/arch/microblaze/pci/pci_32.c +++ b/arch/microblaze/pci/pci_32.c @@ -332,7 +332,7 @@ static void __devinit pcibios_scan_phb(struct pci_controller *hose) hose->global_number); return; } - bus.dev->of_node = of_node_get(node); + bus->dev.of_node = of_node_get(node); bus->secondary = hose->first_busno; hose->bus = bus; -- cgit v1.2.3-70-g09d2 From 6dbd3085c3c3a53dfa4491ebcbf7847955b16f26 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Tue, 26 Jul 2011 11:24:56 +0200 Subject: Revert "microblaze: PCI fix typo fault in of_node pointer moving into pci_bus" This reverts commit c9d761b7c4b658a937a941aea2781f511a0ff3ec. Ben' commit "microblaze/pci: Move the remains of pci_32.c to pci-common.c" (sha1: bf13a6fa09b8db7f1fd59b5e2ed3674a89a6a25c) completely removed pci_32.c that's why my fixing commit caused the problem with merging and need to be revert. Signed-off-by: Michal Simek --- arch/microblaze/pci/pci_32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/pci/pci_32.c b/arch/microblaze/pci/pci_32.c index 9fafb0dd9c2..92728a6cfd8 100644 --- a/arch/microblaze/pci/pci_32.c +++ b/arch/microblaze/pci/pci_32.c @@ -332,7 +332,7 @@ static void __devinit pcibios_scan_phb(struct pci_controller *hose) hose->global_number); return; } - bus->dev.of_node = of_node_get(node); + bus.dev->of_node = of_node_get(node); bus->secondary = hose->first_busno; hose->bus = bus; -- cgit v1.2.3-70-g09d2 From 363922946f96ad1d6420107ebcfa9a95b659fe75 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Wed, 27 Jul 2011 10:45:32 +0200 Subject: microblaze: Do not show error message for 32 interrupt lines When interrupt controller uses 32 interrupts lines the kernel show error message about mismatch in kind-of-intr parameter because it exceeds u32. Recast fixs this issue. Signed-off-by: Michal Simek --- arch/microblaze/kernel/intc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c index c88f066f41b..eb41441c7fd 100644 --- a/arch/microblaze/kernel/intc.c +++ b/arch/microblaze/kernel/intc.c @@ -134,7 +134,7 @@ void __init init_IRQ(void) intr_type = be32_to_cpup(of_get_property(intc, "xlnx,kind-of-intr", NULL)); - if (intr_type >= (1 << (nr_irq + 1))) + if (intr_type > (u32)((1ULL << nr_irq) - 1)) printk(KERN_INFO " ERROR: Mismatch in kind-of-intr param\n"); #ifdef CONFIG_SELFMOD_INTC -- cgit v1.2.3-70-g09d2