diff options
Diffstat (limited to 'arch/ppc/kernel/softemu8xx.c')
| -rw-r--r-- | arch/ppc/kernel/softemu8xx.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/arch/ppc/kernel/softemu8xx.c b/arch/ppc/kernel/softemu8xx.c deleted file mode 100644 index 9bbb6bf7b64..00000000000 --- a/arch/ppc/kernel/softemu8xx.c +++ /dev/null @@ -1,147 +0,0 @@ -/* - * Software emulation of some PPC instructions for the 8xx core. - * - * Copyright (C) 1998 Dan Malek (dmalek@jlc.net) - * - * Software floating emuation for the MPC8xx processor. I did this mostly - * because it was easier than trying to get the libraries compiled for - * software floating point. The goal is still to get the libraries done, - * but I lost patience and needed some hacks to at least get init and - * shells running. The first problem is the setjmp/longjmp that save - * and restore the floating point registers. - * - * For this emulation, our working registers are found on the register - * save area. - */ - -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/stddef.h> -#include <linux/unistd.h> -#include <linux/ptrace.h> -#include <linux/slab.h> -#include <linux/user.h> -#include <linux/a.out.h> -#include <linux/interrupt.h> - -#include <asm/pgtable.h> -#include <asm/uaccess.h> -#include <asm/system.h> -#include <asm/io.h> - -extern void -print_8xx_pte(struct mm_struct *mm, unsigned long addr); -extern int -get_8xx_pte(struct mm_struct *mm, unsigned long addr); - -/* Eventually we may need a look-up table, but this works for now. -*/ -#define LFS 48 -#define LFD 50 -#define LFDU 51 -#define STFD 54 -#define STFDU 55 -#define FMR 63 - -/* - * We return 0 on success, 1 on unimplemented instruction, and EFAULT - * if a load/store faulted. - */ -int -Soft_emulate_8xx(struct pt_regs *regs) -{ - uint inst, instword; - uint flreg, idxreg, disp; - uint retval; - signed short sdisp; - uint *ea, *ip; - - retval = 0; - - instword = *((uint *)regs->nip); - inst = instword >> 26; - - flreg = (instword >> 21) & 0x1f; - idxreg = (instword >> 16) & 0x1f; - disp = instword & 0xffff; - - ea = (uint *)(regs->gpr[idxreg] + disp); - ip = (uint *)¤t->thread.fpr[flreg]; - - switch ( inst ) - { - case LFD: - /* this is a 16 bit quantity that is sign extended - * so use a signed short here -- Cort - */ - sdisp = (instword & 0xffff); - ea = (uint *)(regs->gpr[idxreg] + sdisp); - if (copy_from_user(ip, ea, sizeof(double))) - retval = -EFAULT; - break; - - case LFDU: - if (copy_from_user(ip, ea, sizeof(double))) - retval = -EFAULT; - else - regs->gpr[idxreg] = (uint)ea; - break; - case LFS: - sdisp = (instword & 0xffff); - ea = (uint *)(regs->gpr[idxreg] + sdisp); - if (copy_from_user(ip, ea, sizeof(float))) - retval = -EFAULT; - break; - case STFD: - /* this is a 16 bit quantity that is sign extended - * so use a signed short here -- Cort - */ - sdisp = (instword & 0xffff); - ea = (uint *)(regs->gpr[idxreg] + sdisp); - if (copy_to_user(ea, ip, sizeof(double))) - retval = -EFAULT; - break; - - case STFDU: - if (copy_to_user(ea, ip, sizeof(double))) - retval = -EFAULT; - else - regs->gpr[idxreg] = (uint)ea; - break; - case FMR: - /* assume this is a fp move -- Cort */ - memcpy( ip, ¤t->thread.fpr[(instword>>11)&0x1f], - sizeof(double) ); - break; - default: - retval = 1; - printk("Bad emulation %s/%d\n" - " NIP: %08lx instruction: %08x opcode: %x " - "A: %x B: %x C: %x code: %x rc: %x\n", - current->comm,current->pid, - regs->nip, - instword,inst, - (instword>>16)&0x1f, - (instword>>11)&0x1f, - (instword>>6)&0x1f, - (instword>>1)&0x3ff, - instword&1); - { - int pa; - print_8xx_pte(current->mm,regs->nip); - pa = get_8xx_pte(current->mm,regs->nip) & PAGE_MASK; - pa |= (regs->nip & ~PAGE_MASK); - pa = (unsigned long)__va(pa); - printk("Kernel VA for NIP %x ", pa); - print_8xx_pte(current->mm,pa); - } - - } - - if (retval == 0) - regs->nip += 4; - return(retval); -} - |