From d670bd4f803c8b646acd20f3ba21e65458293faf Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Wed, 3 Dec 2008 03:08:37 -0800 Subject: sparc: prepare kernel/ for unification o sparc32 files with identical names to sparc64 renamed to _32.S o introduced a few Kconfig helpers to simplify Makefile logic o refactored Makefile to prepare for unification - use obj-$(CONFIG_SPARC32) for sparc32 specific files - use _$(BITS) for files where sparc64 has a _64 variant - sparc64 directly include a few files where sparc32 builds them, refer to these files directly (no BITS) - sneaked in -Werror as used by sparc64 o modified sparc/Makefile to use the new names for head/init_task Signed-off-by: Sam Ravnborg Signed-off-by: David S. Miller --- arch/sparc/kernel/traps.c | 490 ---------------------------------------------- 1 file changed, 490 deletions(-) delete mode 100644 arch/sparc/kernel/traps.c (limited to 'arch/sparc/kernel/traps.c') diff --git a/arch/sparc/kernel/traps.c b/arch/sparc/kernel/traps.c deleted file mode 100644 index 2b7d506..0000000 --- a/arch/sparc/kernel/traps.c +++ /dev/null @@ -1,490 +0,0 @@ -/* - * arch/sparc/kernel/traps.c - * - * Copyright 1995, 2008 David S. Miller (davem@davemloft.net) - * Copyright 2000 Jakub Jelinek (jakub@redhat.com) - */ - -/* - * I hate traps on the sparc, grrr... - */ - -#include /* for jiffies */ -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include - -/* #define TRAP_DEBUG */ - -struct trap_trace_entry { - unsigned long pc; - unsigned long type; -}; - -void syscall_trace_entry(struct pt_regs *regs) -{ - printk("%s[%d]: ", current->comm, task_pid_nr(current)); - printk("scall<%d> (could be %d)\n", (int) regs->u_regs[UREG_G1], - (int) regs->u_regs[UREG_I0]); -} - -void syscall_trace_exit(struct pt_regs *regs) -{ -} - -void sun4d_nmi(struct pt_regs *regs) -{ - printk("Aieee: sun4d NMI received!\n"); - printk("you lose buddy boy...\n"); - show_regs(regs); - prom_halt(); -} - -static void instruction_dump(unsigned long *pc) -{ - int i; - - if((((unsigned long) pc) & 3)) - return; - - for(i = -3; i < 6; i++) - printk("%c%08lx%c",i?' ':'<',pc[i],i?' ':'>'); - printk("\n"); -} - -#define __SAVE __asm__ __volatile__("save %sp, -0x40, %sp\n\t") -#define __RESTORE __asm__ __volatile__("restore %g0, %g0, %g0\n\t") - -void die_if_kernel(char *str, struct pt_regs *regs) -{ - static int die_counter; - int count = 0; - - /* Amuse the user. */ - printk( -" \\|/ ____ \\|/\n" -" \"@'/ ,. \\`@\"\n" -" /_| \\__/ |_\\\n" -" \\__U_/\n"); - - printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter); - show_regs(regs); - add_taint(TAINT_DIE); - - __SAVE; __SAVE; __SAVE; __SAVE; - __SAVE; __SAVE; __SAVE; __SAVE; - __RESTORE; __RESTORE; __RESTORE; __RESTORE; - __RESTORE; __RESTORE; __RESTORE; __RESTORE; - - { - struct reg_window *rw = (struct reg_window *)regs->u_regs[UREG_FP]; - - /* Stop the back trace when we hit userland or we - * find some badly aligned kernel stack. Set an upper - * bound in case our stack is trashed and we loop. - */ - while(rw && - count++ < 30 && - (((unsigned long) rw) >= PAGE_OFFSET) && - !(((unsigned long) rw) & 0x7)) { - printk("Caller[%08lx]: %pS\n", rw->ins[7], - (void *) rw->ins[7]); - rw = (struct reg_window *)rw->ins[6]; - } - } - printk("Instruction DUMP:"); - instruction_dump ((unsigned long *) regs->pc); - if(regs->psr & PSR_PS) - do_exit(SIGKILL); - do_exit(SIGSEGV); -} - -void do_hw_interrupt(struct pt_regs *regs, unsigned long type) -{ - siginfo_t info; - - if(type < 0x80) { - /* Sun OS's puke from bad traps, Linux survives! */ - printk("Unimplemented Sparc TRAP, type = %02lx\n", type); - die_if_kernel("Whee... Hello Mr. Penguin", regs); - } - - if(regs->psr & PSR_PS) - die_if_kernel("Kernel bad trap", regs); - - info.si_signo = SIGILL; - info.si_errno = 0; - info.si_code = ILL_ILLTRP; - info.si_addr = (void __user *)regs->pc; - info.si_trapno = type - 0x80; - force_sig_info(SIGILL, &info, current); -} - -void do_illegal_instruction(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - extern int do_user_muldiv (struct pt_regs *, unsigned long); - siginfo_t info; - - if(psr & PSR_PS) - die_if_kernel("Kernel illegal instruction", regs); -#ifdef TRAP_DEBUG - printk("Ill instr. at pc=%08lx instruction is %08lx\n", - regs->pc, *(unsigned long *)regs->pc); -#endif - if (!do_user_muldiv (regs, pc)) - return; - - info.si_signo = SIGILL; - info.si_errno = 0; - info.si_code = ILL_ILLOPC; - info.si_addr = (void __user *)pc; - info.si_trapno = 0; - send_sig_info(SIGILL, &info, current); -} - -void do_priv_instruction(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - siginfo_t info; - - if(psr & PSR_PS) - die_if_kernel("Penguin instruction from Penguin mode??!?!", regs); - info.si_signo = SIGILL; - info.si_errno = 0; - info.si_code = ILL_PRVOPC; - info.si_addr = (void __user *)pc; - info.si_trapno = 0; - send_sig_info(SIGILL, &info, current); -} - -/* XXX User may want to be allowed to do this. XXX */ - -void do_memaccess_unaligned(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - siginfo_t info; - - if(regs->psr & PSR_PS) { - printk("KERNEL MNA at pc %08lx npc %08lx called by %08lx\n", pc, npc, - regs->u_regs[UREG_RETPC]); - die_if_kernel("BOGUS", regs); - /* die_if_kernel("Kernel MNA access", regs); */ - } -#if 0 - show_regs (regs); - instruction_dump ((unsigned long *) regs->pc); - printk ("do_MNA!\n"); -#endif - info.si_signo = SIGBUS; - info.si_errno = 0; - info.si_code = BUS_ADRALN; - info.si_addr = /* FIXME: Should dig out mna address */ (void *)0; - info.si_trapno = 0; - send_sig_info(SIGBUS, &info, current); -} - -extern void fpsave(unsigned long *fpregs, unsigned long *fsr, - void *fpqueue, unsigned long *fpqdepth); -extern void fpload(unsigned long *fpregs, unsigned long *fsr); - -static unsigned long init_fsr = 0x0UL; -static unsigned long init_fregs[32] __attribute__ ((aligned (8))) = - { ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, - ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, - ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, - ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL, ~0UL }; - -void do_fpd_trap(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - /* Sanity check... */ - if(psr & PSR_PS) - die_if_kernel("Kernel gets FloatingPenguinUnit disabled trap", regs); - - put_psr(get_psr() | PSR_EF); /* Allow FPU ops. */ - regs->psr |= PSR_EF; -#ifndef CONFIG_SMP - if(last_task_used_math == current) - return; - if(last_task_used_math) { - /* Other processes fpu state, save away */ - struct task_struct *fptask = last_task_used_math; - fpsave(&fptask->thread.float_regs[0], &fptask->thread.fsr, - &fptask->thread.fpqueue[0], &fptask->thread.fpqdepth); - } - last_task_used_math = current; - if(used_math()) { - fpload(¤t->thread.float_regs[0], ¤t->thread.fsr); - } else { - /* Set initial sane state. */ - fpload(&init_fregs[0], &init_fsr); - set_used_math(); - } -#else - if(!used_math()) { - fpload(&init_fregs[0], &init_fsr); - set_used_math(); - } else { - fpload(¤t->thread.float_regs[0], ¤t->thread.fsr); - } - set_thread_flag(TIF_USEDFPU); -#endif -} - -static unsigned long fake_regs[32] __attribute__ ((aligned (8))); -static unsigned long fake_fsr; -static unsigned long fake_queue[32] __attribute__ ((aligned (8))); -static unsigned long fake_depth; - -extern int do_mathemu(struct pt_regs *, struct task_struct *); - -void do_fpe_trap(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - static int calls; - siginfo_t info; - unsigned long fsr; - int ret = 0; -#ifndef CONFIG_SMP - struct task_struct *fpt = last_task_used_math; -#else - struct task_struct *fpt = current; -#endif - put_psr(get_psr() | PSR_EF); - /* If nobody owns the fpu right now, just clear the - * error into our fake static buffer and hope it don't - * happen again. Thank you crashme... - */ -#ifndef CONFIG_SMP - if(!fpt) { -#else - if (!test_tsk_thread_flag(fpt, TIF_USEDFPU)) { -#endif - fpsave(&fake_regs[0], &fake_fsr, &fake_queue[0], &fake_depth); - regs->psr &= ~PSR_EF; - return; - } - fpsave(&fpt->thread.float_regs[0], &fpt->thread.fsr, - &fpt->thread.fpqueue[0], &fpt->thread.fpqdepth); -#ifdef DEBUG_FPU - printk("Hmm, FP exception, fsr was %016lx\n", fpt->thread.fsr); -#endif - - switch ((fpt->thread.fsr & 0x1c000)) { - /* switch on the contents of the ftt [floating point trap type] field */ -#ifdef DEBUG_FPU - case (1 << 14): - printk("IEEE_754_exception\n"); - break; -#endif - case (2 << 14): /* unfinished_FPop (underflow & co) */ - case (3 << 14): /* unimplemented_FPop (quad stuff, maybe sqrt) */ - ret = do_mathemu(regs, fpt); - break; -#ifdef DEBUG_FPU - case (4 << 14): - printk("sequence_error (OS bug...)\n"); - break; - case (5 << 14): - printk("hardware_error (uhoh!)\n"); - break; - case (6 << 14): - printk("invalid_fp_register (user error)\n"); - break; -#endif /* DEBUG_FPU */ - } - /* If we successfully emulated the FPop, we pretend the trap never happened :-> */ - if (ret) { - fpload(¤t->thread.float_regs[0], ¤t->thread.fsr); - return; - } - /* nope, better SIGFPE the offending process... */ - -#ifdef CONFIG_SMP - clear_tsk_thread_flag(fpt, TIF_USEDFPU); -#endif - if(psr & PSR_PS) { - /* The first fsr store/load we tried trapped, - * the second one will not (we hope). - */ - printk("WARNING: FPU exception from kernel mode. at pc=%08lx\n", - regs->pc); - regs->pc = regs->npc; - regs->npc += 4; - calls++; - if(calls > 2) - die_if_kernel("Too many Penguin-FPU traps from kernel mode", - regs); - return; - } - - fsr = fpt->thread.fsr; - info.si_signo = SIGFPE; - info.si_errno = 0; - info.si_addr = (void __user *)pc; - info.si_trapno = 0; - info.si_code = __SI_FAULT; - if ((fsr & 0x1c000) == (1 << 14)) { - if (fsr & 0x10) - info.si_code = FPE_FLTINV; - else if (fsr & 0x08) - info.si_code = FPE_FLTOVF; - else if (fsr & 0x04) - info.si_code = FPE_FLTUND; - else if (fsr & 0x02) - info.si_code = FPE_FLTDIV; - else if (fsr & 0x01) - info.si_code = FPE_FLTRES; - } - send_sig_info(SIGFPE, &info, fpt); -#ifndef CONFIG_SMP - last_task_used_math = NULL; -#endif - regs->psr &= ~PSR_EF; - if(calls > 0) - calls=0; -} - -void handle_tag_overflow(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - siginfo_t info; - - if(psr & PSR_PS) - die_if_kernel("Penguin overflow trap from kernel mode", regs); - info.si_signo = SIGEMT; - info.si_errno = 0; - info.si_code = EMT_TAGOVF; - info.si_addr = (void __user *)pc; - info.si_trapno = 0; - send_sig_info(SIGEMT, &info, current); -} - -void handle_watchpoint(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ -#ifdef TRAP_DEBUG - printk("Watchpoint detected at PC %08lx NPC %08lx PSR %08lx\n", - pc, npc, psr); -#endif - if(psr & PSR_PS) - panic("Tell me what a watchpoint trap is, and I'll then deal " - "with such a beast..."); -} - -void handle_reg_access(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - siginfo_t info; - -#ifdef TRAP_DEBUG - printk("Register Access Exception at PC %08lx NPC %08lx PSR %08lx\n", - pc, npc, psr); -#endif - info.si_signo = SIGBUS; - info.si_errno = 0; - info.si_code = BUS_OBJERR; - info.si_addr = (void __user *)pc; - info.si_trapno = 0; - force_sig_info(SIGBUS, &info, current); -} - -void handle_cp_disabled(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - siginfo_t info; - - info.si_signo = SIGILL; - info.si_errno = 0; - info.si_code = ILL_COPROC; - info.si_addr = (void __user *)pc; - info.si_trapno = 0; - send_sig_info(SIGILL, &info, current); -} - -void handle_cp_exception(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - siginfo_t info; - -#ifdef TRAP_DEBUG - printk("Co-Processor Exception at PC %08lx NPC %08lx PSR %08lx\n", - pc, npc, psr); -#endif - info.si_signo = SIGILL; - info.si_errno = 0; - info.si_code = ILL_COPROC; - info.si_addr = (void __user *)pc; - info.si_trapno = 0; - send_sig_info(SIGILL, &info, current); -} - -void handle_hw_divzero(struct pt_regs *regs, unsigned long pc, unsigned long npc, - unsigned long psr) -{ - siginfo_t info; - - info.si_signo = SIGFPE; - info.si_errno = 0; - info.si_code = FPE_INTDIV; - info.si_addr = (void __user *)pc; - info.si_trapno = 0; - send_sig_info(SIGFPE, &info, current); -} - -#ifdef CONFIG_DEBUG_BUGVERBOSE -void do_BUG(const char *file, int line) -{ - // bust_spinlocks(1); XXX Not in our original BUG() - printk("kernel BUG at %s:%d!\n", file, line); -} -#endif - -/* Since we have our mappings set up, on multiprocessors we can spin them - * up here so that timer interrupts work during initialization. - */ - -extern void sparc_cpu_startup(void); - -void trap_init(void) -{ - extern void thread_info_offsets_are_bolixed_pete(void); - - /* Force linker to barf if mismatched */ - if (TI_UWINMASK != offsetof(struct thread_info, uwinmask) || - TI_TASK != offsetof(struct thread_info, task) || - TI_EXECDOMAIN != offsetof(struct thread_info, exec_domain) || - TI_FLAGS != offsetof(struct thread_info, flags) || - TI_CPU != offsetof(struct thread_info, cpu) || - TI_PREEMPT != offsetof(struct thread_info, preempt_count) || - TI_SOFTIRQ != offsetof(struct thread_info, softirq_count) || - TI_HARDIRQ != offsetof(struct thread_info, hardirq_count) || - TI_KSP != offsetof(struct thread_info, ksp) || - TI_KPC != offsetof(struct thread_info, kpc) || - TI_KPSR != offsetof(struct thread_info, kpsr) || - TI_KWIM != offsetof(struct thread_info, kwim) || - TI_REG_WINDOW != offsetof(struct thread_info, reg_window) || - TI_RWIN_SPTRS != offsetof(struct thread_info, rwbuf_stkptrs) || - TI_W_SAVED != offsetof(struct thread_info, w_saved)) - thread_info_offsets_are_bolixed_pete(); - - /* Attach to the address space of init_task. */ - atomic_inc(&init_mm.mm_count); - current->active_mm = &init_mm; - - /* NOTE: Other cpus have this done as they are started - * up on SMP. - */ -} -- cgit v1.1