summaryrefslogtreecommitdiffstats
path: root/arch/ppc/kernel/softemu8xx.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc/kernel/softemu8xx.c')
-rw-r--r--arch/ppc/kernel/softemu8xx.c147
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 9bbb6bf..0000000
--- 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 *)&current->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, &current->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);
-}
-
OpenPOWER on IntegriCloud