diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/nwfpe/fpmodule.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/nwfpe/fpmodule.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/ANDROID_3.4.5/arch/arm/nwfpe/fpmodule.c b/ANDROID_3.4.5/arch/arm/nwfpe/fpmodule.c deleted file mode 100644 index cb7658e8..00000000 --- a/ANDROID_3.4.5/arch/arm/nwfpe/fpmodule.c +++ /dev/null @@ -1,190 +0,0 @@ - -/* - NetWinder Floating Point Emulator - (c) Rebel.com, 1998-1999 - (c) Philip Blundell, 1998-1999 - - Direct questions, comments to Scott Bambrough <scottb@netwinder.org> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#include "fpa11.h" - -#include <linux/module.h> -#include <linux/moduleparam.h> - -/* XXX */ -#include <linux/errno.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/init.h> - -#include <asm/thread_notify.h> - -#include "softfloat.h" -#include "fpopcode.h" -#include "fpmodule.h" -#include "fpa11.inl" - -/* kernel symbols required for signal handling */ -#ifdef CONFIG_FPE_NWFPE_XP -#define NWFPE_BITS "extended" -#else -#define NWFPE_BITS "double" -#endif - -#ifdef MODULE -void fp_send_sig(unsigned long sig, struct task_struct *p, int priv); -#else -#define fp_send_sig send_sig -#define kern_fp_enter fp_enter - -extern char fpe_type[]; -#endif - -static int nwfpe_notify(struct notifier_block *self, unsigned long cmd, void *v) -{ - struct thread_info *thread = v; - - if (cmd == THREAD_NOTIFY_FLUSH) - nwfpe_init_fpa(&thread->fpstate); - - return NOTIFY_DONE; -} - -static struct notifier_block nwfpe_notifier_block = { - .notifier_call = nwfpe_notify, -}; - -/* kernel function prototypes required */ -void fp_setup(void); - -/* external declarations for saved kernel symbols */ -extern void (*kern_fp_enter)(void); - -/* Original value of fp_enter from kernel before patched by fpe_init. */ -static void (*orig_fp_enter)(void); - -/* forward declarations */ -extern void nwfpe_enter(void); - -static int __init fpe_init(void) -{ - if (sizeof(FPA11) > sizeof(union fp_state)) { - printk(KERN_ERR "nwfpe: bad structure size\n"); - return -EINVAL; - } - - if (sizeof(FPREG) != 12) { - printk(KERN_ERR "nwfpe: bad register size\n"); - return -EINVAL; - } - if (fpe_type[0] && strcmp(fpe_type, "nwfpe")) - return 0; - - /* Display title, version and copyright information. */ - printk(KERN_WARNING "NetWinder Floating Point Emulator V0.97 (" - NWFPE_BITS " precision)\n"); - - thread_register_notifier(&nwfpe_notifier_block); - - /* Save pointer to the old FP handler and then patch ourselves in */ - orig_fp_enter = kern_fp_enter; - kern_fp_enter = nwfpe_enter; - - return 0; -} - -static void __exit fpe_exit(void) -{ - thread_unregister_notifier(&nwfpe_notifier_block); - /* Restore the values we saved earlier. */ - kern_fp_enter = orig_fp_enter; -} - -/* -ScottB: November 4, 1998 - -Moved this function out of softfloat-specialize into fpmodule.c. -This effectively isolates all the changes required for integrating with the -Linux kernel into fpmodule.c. Porting to NetBSD should only require modifying -fpmodule.c to integrate with the NetBSD kernel (I hope!). - -[1/1/99: Not quite true any more unfortunately. There is Linux-specific -code to access data in user space in some other source files at the -moment (grep for get_user / put_user calls). --philb] - -This function is called by the SoftFloat routines to raise a floating -point exception. We check the trap enable byte in the FPSR, and raise -a SIGFPE exception if necessary. If not the relevant bits in the -cumulative exceptions flag byte are set and we return. -*/ - -#ifdef CONFIG_DEBUG_USER -/* By default, ignore inexact errors as there are far too many of them to log */ -static int debug = ~BIT_IXC; -#endif - -void float_raise(signed char flags) -{ - register unsigned int fpsr, cumulativeTraps; - -#ifdef CONFIG_DEBUG_USER - if (flags & debug) - printk(KERN_DEBUG - "NWFPE: %s[%d] takes exception %08x at %p from %08lx\n", - current->comm, current->pid, flags, - __builtin_return_address(0), GET_USERREG()->ARM_pc); -#endif - - /* Read fpsr and initialize the cumulativeTraps. */ - fpsr = readFPSR(); - cumulativeTraps = 0; - - /* For each type of exception, the cumulative trap exception bit is only - set if the corresponding trap enable bit is not set. */ - if ((!(fpsr & BIT_IXE)) && (flags & BIT_IXC)) - cumulativeTraps |= BIT_IXC; - if ((!(fpsr & BIT_UFE)) && (flags & BIT_UFC)) - cumulativeTraps |= BIT_UFC; - if ((!(fpsr & BIT_OFE)) && (flags & BIT_OFC)) - cumulativeTraps |= BIT_OFC; - if ((!(fpsr & BIT_DZE)) && (flags & BIT_DZC)) - cumulativeTraps |= BIT_DZC; - if ((!(fpsr & BIT_IOE)) && (flags & BIT_IOC)) - cumulativeTraps |= BIT_IOC; - - /* Set the cumulative exceptions flags. */ - if (cumulativeTraps) - writeFPSR(fpsr | cumulativeTraps); - - /* Raise an exception if necessary. */ - if (fpsr & (flags << 16)) - fp_send_sig(SIGFPE, current, 1); -} - -module_init(fpe_init); -module_exit(fpe_exit); - -MODULE_AUTHOR("Scott Bambrough <scottb@rebel.com>"); -MODULE_DESCRIPTION("NWFPE floating point emulator (" NWFPE_BITS " precision)"); -MODULE_LICENSE("GPL"); - -#ifdef CONFIG_DEBUG_USER -module_param(debug, int, 0644); -#endif |