From 4511ec153afd132da9f4308e7db394820eb52129 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Fri, 27 Mar 2009 14:25:37 +0100 Subject: microblaze_v8: system.h processor.h Reviewed-by: Ingo Molnar Acked-by: John Linn Acked-by: Stephen Neuendorffer Acked-by: John Williams Signed-off-by: Michal Simek --- arch/microblaze/include/asm/processor.h | 93 +++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 arch/microblaze/include/asm/processor.h (limited to 'arch/microblaze/include/asm/processor.h') diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h new file mode 100644 index 00000000000..d8e15434ba2 --- /dev/null +++ b/arch/microblaze/include/asm/processor.h @@ -0,0 +1,93 @@ +/* + * Copyright (C) 2008 Michal Simek + * Copyright (C) 2008 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * 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. + */ + +#ifndef _ASM_MICROBLAZE_PROCESSOR_H +#define _ASM_MICROBLAZE_PROCESSOR_H + +#include +#include +#include +#include + +# ifndef __ASSEMBLY__ +/* from kernel/cpu/mb.c */ +extern const struct seq_operations cpuinfo_op; + +# define cpu_relax() barrier() +# define cpu_sleep() do {} while (0) +# define prepare_to_copy(tsk) do {} while (0) + +# endif /* __ASSEMBLY__ */ + +/* + * User space process size: memory size + * + * TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both + * user processes and the kernel is on the same memory region. They + * both share the memory space and that is limited by the amount of + * physical memory. thus, we set TASK_SIZE == amount of total memory. + */ +# define TASK_SIZE (0x81000000 - 0x80000000) + +/* + * Default implementation of macro that returns current + * instruction pointer ("program counter"). + */ +# define current_text_addr() ({ __label__ _l; _l: &&_l; }) + +/* + * This decides where the kernel will search for a free chunk of vm + * space during mmap's. We won't be using it + */ +# define TASK_UNMAPPED_BASE 0 + +/* definition in include/linux/sched.h */ +struct task_struct; + +/* thread_struct is gone. use thread_info instead. */ +struct thread_struct { }; +# define INIT_THREAD { } + +/* Do necessary setup to start up a newly executed thread. */ +static inline void start_thread(struct pt_regs *regs, + unsigned long pc, + unsigned long usp) +{ + regs->pc = pc; + regs->r1 = usp; + regs->kernel_mode = 0; +} + +/* Free all resources held by a thread. */ +static inline void release_thread(struct task_struct *dead_task) +{ +} + +/* Free all resources held by a thread. */ +static inline void exit_thread(void) +{ +} + +extern unsigned long thread_saved_pc(struct task_struct *t); + +extern unsigned long get_wchan(struct task_struct *p); + +/* + * create a kernel thread without removing it from tasklists + */ +extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); + +# define task_pt_regs(tsk) \ + (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) + +# define KSTK_EIP(tsk) (0) +# define KSTK_ESP(tsk) (0) + +#endif /* _ASM_MICROBLAZE_PROCESSOR_H */ -- cgit v1.2.3-70-g09d2 From ac3efab50621bd6d01e5b40f3134dc7824788390 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 16 Apr 2009 10:58:47 +0200 Subject: microblaze: Rename kernel_mode to pt_mode in pt_regs Signed-off-by: Michal Simek --- arch/microblaze/include/asm/processor.h | 2 +- arch/microblaze/include/asm/ptrace.h | 4 ++-- arch/microblaze/kernel/asm-offsets.c | 2 +- arch/microblaze/kernel/process.c | 4 ++-- 4 files changed, 6 insertions(+), 6 deletions(-) (limited to 'arch/microblaze/include/asm/processor.h') diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index d8e15434ba2..4bed76d0a6c 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -62,7 +62,7 @@ static inline void start_thread(struct pt_regs *regs, { regs->pc = pc; regs->r1 = usp; - regs->kernel_mode = 0; + regs->pt_mode = 0; } /* Free all resources held by a thread. */ diff --git a/arch/microblaze/include/asm/ptrace.h b/arch/microblaze/include/asm/ptrace.h index f1f03486428..55015bce5e4 100644 --- a/arch/microblaze/include/asm/ptrace.h +++ b/arch/microblaze/include/asm/ptrace.h @@ -52,10 +52,10 @@ struct pt_regs { microblaze_reg_t ear; microblaze_reg_t esr; microblaze_reg_t fsr; - int kernel_mode; + int pt_mode; }; -#define kernel_mode(regs) ((regs)->kernel_mode) +#define kernel_mode(regs) ((regs)->pt_mode) #define user_mode(regs) (!kernel_mode(regs)) #define instruction_pointer(regs) ((regs)->pc) diff --git a/arch/microblaze/kernel/asm-offsets.c b/arch/microblaze/kernel/asm-offsets.c index 38e1a2e8ad0..aabd9e9423a 100644 --- a/arch/microblaze/kernel/asm-offsets.c +++ b/arch/microblaze/kernel/asm-offsets.c @@ -57,7 +57,7 @@ int main(int argc, char *argv[]) DEFINE(PT_R29, offsetof(struct pt_regs, r29)); DEFINE(PT_R30, offsetof(struct pt_regs, r30)); DEFINE(PT_R31, offsetof(struct pt_regs, r31)); - DEFINE(PT_MODE, offsetof(struct pt_regs, kernel_mode)); + DEFINE(PT_MODE, offsetof(struct pt_regs, pt_mode)); BLANK(); /* Magic offsets for PTRACE PEEK/POKE etc */ diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index bdc8b2c6c57..40cc1480810 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -18,7 +18,7 @@ void show_regs(struct pt_regs *regs) { - printk(KERN_INFO " Registers dump: mode=%X\r\n", regs->kernel_mode); + printk(KERN_INFO " Registers dump: mode=%X\r\n", regs->pt_mode); printk(KERN_INFO " r1=%08lX, r2=%08lX, r3=%08lX, r4=%08lX\n", regs->r1, regs->r2, regs->r3, regs->r4); printk(KERN_INFO " r5=%08lX, r6=%08lX, r7=%08lX, r8=%08lX\n", @@ -169,7 +169,7 @@ int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) regs.r6 = (unsigned long)arg; local_save_flags(regs.msr); regs.pc = (unsigned long)kernel_thread_helper; - regs.kernel_mode = 1; + regs.pt_mode = 1; ret = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL); -- cgit v1.2.3-70-g09d2 From 2eba318e0db1114726e69660d6b9e1bd59b10ba1 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 16 Apr 2009 11:05:26 +0200 Subject: microblaze: Move task_pt_regs up This change is important for easier merge with Microblaze MMU code. Signed-off-by: Michal Simek --- arch/microblaze/include/asm/processor.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/microblaze/include/asm/processor.h') diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index 4bed76d0a6c..cea42a36d16 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -26,6 +26,9 @@ extern const struct seq_operations cpuinfo_op; # endif /* __ASSEMBLY__ */ +#define task_pt_regs(tsk) \ + (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) + /* * User space process size: memory size * @@ -84,9 +87,6 @@ extern unsigned long get_wchan(struct task_struct *p); */ extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); -# define task_pt_regs(tsk) \ - (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) - # define KSTK_EIP(tsk) (0) # define KSTK_ESP(tsk) (0) -- cgit v1.2.3-70-g09d2 From e1c4bd0897b6d03eff4b32197d6ab017f83fc836 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 16 Apr 2009 11:30:16 +0200 Subject: microblaze: Move start_thread to process.c This change is due to upcomming MMU merge Signed-off-by: Michal Simek --- arch/microblaze/include/asm/processor.h | 13 +++---------- arch/microblaze/kernel/process.c | 9 +++++++++ 2 files changed, 12 insertions(+), 10 deletions(-) (limited to 'arch/microblaze/include/asm/processor.h') diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index cea42a36d16..89aa3956929 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -29,6 +29,9 @@ extern const struct seq_operations cpuinfo_op; #define task_pt_regs(tsk) \ (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) +/* Do necessary setup to start up a newly executed thread. */ +void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp); + /* * User space process size: memory size * @@ -58,16 +61,6 @@ struct task_struct; struct thread_struct { }; # define INIT_THREAD { } -/* Do necessary setup to start up a newly executed thread. */ -static inline void start_thread(struct pt_regs *regs, - unsigned long pc, - unsigned long usp) -{ - regs->pc = pc; - regs->r1 = usp; - regs->pt_mode = 0; -} - /* Free all resources held by a thread. */ static inline void release_thread(struct task_struct *dead_task) { diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index 40cc1480810..dd15de9cde3 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -182,3 +182,12 @@ unsigned long get_wchan(struct task_struct *p) /* TBD (used by procfs) */ return 0; } + +/* 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 2921e2bd679949a7892d308b414e6a3b3c705260 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Tue, 21 Apr 2009 14:08:47 +0200 Subject: microblaze: Add STATE_SAVE_ARG_SPACE for noMMU kernel too For noMMU kernel this change nothing bring but this change helps with MMU synchronization. Signed-off-by: Michal Simek --- arch/microblaze/include/asm/entry.h | 3 +++ arch/microblaze/include/asm/processor.h | 2 ++ arch/microblaze/kernel/signal.c | 14 ++++++++++---- 3 files changed, 15 insertions(+), 4 deletions(-) (limited to 'arch/microblaze/include/asm/processor.h') diff --git a/arch/microblaze/include/asm/entry.h b/arch/microblaze/include/asm/entry.h index 1019d88b812..e4c3aef884d 100644 --- a/arch/microblaze/include/asm/entry.h +++ b/arch/microblaze/include/asm/entry.h @@ -31,4 +31,7 @@ DECLARE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */ DECLARE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */ # endif /* __ASSEMBLY__ */ +/* noMMU hasn't any space for args */ +# define STATE_SAVE_ARG_SPACE (0) + #endif /* _ASM_MICROBLAZE_ENTRY_H */ diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index 89aa3956929..9329029d261 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -15,6 +15,8 @@ #include #include #include +#include +#include # ifndef __ASSEMBLY__ /* from kernel/cpu/mb.c */ diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c index 3889cf45fa7..40d36931e36 100644 --- a/arch/microblaze/kernel/signal.c +++ b/arch/microblaze/kernel/signal.c @@ -178,7 +178,9 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc, int *rval_p) asmlinkage int sys_sigreturn(struct pt_regs *regs) { - struct sigframe *frame = (struct sigframe *)regs->r1; + struct sigframe *frame = + (struct sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE); + sigset_t set; int rval; @@ -209,7 +211,9 @@ badframe: asmlinkage int sys_rt_sigreturn(struct pt_regs *regs) { - struct rt_sigframe *frame = (struct rt_sigframe *)regs->r1; + struct rt_sigframe *frame = + (struct rt_sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE); + sigset_t set; stack_t st; int rval; @@ -336,7 +340,8 @@ static void setup_frame(int sig, struct k_sigaction *ka, goto give_sigsegv; /* Set up registers for signal handler */ - regs->r1 = (unsigned long) frame; + regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE; + /* Signal handler args: */ regs->r5 = signal; /* Arg 0: signum */ regs->r6 = (unsigned long) &frame->sc; /* arg 1: sigcontext */ @@ -414,7 +419,8 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, goto give_sigsegv; /* Set up registers for signal handler */ - regs->r1 = (unsigned long) frame; + regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE; + /* Signal handler args: */ regs->r5 = signal; /* arg 0: signum */ regs->r6 = (unsigned long) &frame->info; /* arg 1: siginfo */ -- cgit v1.2.3-70-g09d2