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Diffstat (limited to 'arch/m68k/kernel/signal_mm.c')
-rw-r--r--arch/m68k/kernel/signal_mm.c204
1 files changed, 151 insertions, 53 deletions
diff --git a/arch/m68k/kernel/signal_mm.c b/arch/m68k/kernel/signal_mm.c
index a0afc239304e..cb856f9da655 100644
--- a/arch/m68k/kernel/signal_mm.c
+++ b/arch/m68k/kernel/signal_mm.c
@@ -56,7 +56,11 @@ static const int frame_extra_sizes[16] = {
[1] = -1, /* sizeof(((struct frame *)0)->un.fmt1), */
[2] = sizeof(((struct frame *)0)->un.fmt2),
[3] = sizeof(((struct frame *)0)->un.fmt3),
+#ifdef CONFIG_COLDFIRE
+ [4] = 0,
+#else
[4] = sizeof(((struct frame *)0)->un.fmt4),
+#endif
[5] = -1, /* sizeof(((struct frame *)0)->un.fmt5), */
[6] = -1, /* sizeof(((struct frame *)0)->un.fmt6), */
[7] = sizeof(((struct frame *)0)->un.fmt7),
@@ -84,7 +88,11 @@ int handle_kernel_fault(struct pt_regs *regs)
regs->stkadj = frame_extra_sizes[regs->format];
tregs = (struct pt_regs *)((long)regs + regs->stkadj);
tregs->vector = regs->vector;
+#ifdef CONFIG_COLDFIRE
+ tregs->format = 4;
+#else
tregs->format = 0;
+#endif
tregs->pc = fixup->fixup;
tregs->sr = regs->sr;
@@ -195,7 +203,8 @@ static inline int restore_fpu_state(struct sigcontext *sc)
if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
/* Verify the frame format. */
- if (!CPU_IS_060 && (sc->sc_fpstate[0] != fpu_version))
+ if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
+ (sc->sc_fpstate[0] != fpu_version))
goto out;
if (CPU_IS_020_OR_030) {
if (m68k_fputype & FPU_68881 &&
@@ -214,19 +223,43 @@ static inline int restore_fpu_state(struct sigcontext *sc)
sc->sc_fpstate[3] == 0x60 ||
sc->sc_fpstate[3] == 0xe0))
goto out;
+ } else if (CPU_IS_COLDFIRE) {
+ if (!(sc->sc_fpstate[0] == 0x00 ||
+ sc->sc_fpstate[0] == 0x05 ||
+ sc->sc_fpstate[0] == 0xe5))
+ goto out;
} else
goto out;
- __asm__ volatile (".chip 68k/68881\n\t"
- "fmovemx %0,%%fp0-%%fp1\n\t"
- "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
- ".chip 68k"
- : /* no outputs */
- : "m" (*sc->sc_fpregs), "m" (*sc->sc_fpcntl));
+ if (CPU_IS_COLDFIRE) {
+ __asm__ volatile ("fmovemd %0,%%fp0-%%fp1\n\t"
+ "fmovel %1,%%fpcr\n\t"
+ "fmovel %2,%%fpsr\n\t"
+ "fmovel %3,%%fpiar"
+ : /* no outputs */
+ : "m" (sc->sc_fpregs[0]),
+ "m" (sc->sc_fpcntl[0]),
+ "m" (sc->sc_fpcntl[1]),
+ "m" (sc->sc_fpcntl[2]));
+ } else {
+ __asm__ volatile (".chip 68k/68881\n\t"
+ "fmovemx %0,%%fp0-%%fp1\n\t"
+ "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
+ ".chip 68k"
+ : /* no outputs */
+ : "m" (*sc->sc_fpregs),
+ "m" (*sc->sc_fpcntl));
+ }
+ }
+
+ if (CPU_IS_COLDFIRE) {
+ __asm__ volatile ("frestore %0" : : "m" (*sc->sc_fpstate));
+ } else {
+ __asm__ volatile (".chip 68k/68881\n\t"
+ "frestore %0\n\t"
+ ".chip 68k"
+ : : "m" (*sc->sc_fpstate));
}
- __asm__ volatile (".chip 68k/68881\n\t"
- "frestore %0\n\t"
- ".chip 68k" : : "m" (*sc->sc_fpstate));
err = 0;
out:
@@ -241,7 +274,7 @@ out:
static inline int rt_restore_fpu_state(struct ucontext __user *uc)
{
unsigned char fpstate[FPCONTEXT_SIZE];
- int context_size = CPU_IS_060 ? 8 : 0;
+ int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
fpregset_t fpregs;
int err = 1;
@@ -260,10 +293,11 @@ static inline int rt_restore_fpu_state(struct ucontext __user *uc)
if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate))
goto out;
if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
- if (!CPU_IS_060)
+ if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
context_size = fpstate[1];
/* Verify the frame format. */
- if (!CPU_IS_060 && (fpstate[0] != fpu_version))
+ if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
+ (fpstate[0] != fpu_version))
goto out;
if (CPU_IS_020_OR_030) {
if (m68k_fputype & FPU_68881 &&
@@ -282,26 +316,50 @@ static inline int rt_restore_fpu_state(struct ucontext __user *uc)
fpstate[3] == 0x60 ||
fpstate[3] == 0xe0))
goto out;
+ } else if (CPU_IS_COLDFIRE) {
+ if (!(fpstate[3] == 0x00 ||
+ fpstate[3] == 0x05 ||
+ fpstate[3] == 0xe5))
+ goto out;
} else
goto out;
if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs,
sizeof(fpregs)))
goto out;
- __asm__ volatile (".chip 68k/68881\n\t"
- "fmovemx %0,%%fp0-%%fp7\n\t"
- "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
- ".chip 68k"
- : /* no outputs */
- : "m" (*fpregs.f_fpregs),
- "m" (*fpregs.f_fpcntl));
+
+ if (CPU_IS_COLDFIRE) {
+ __asm__ volatile ("fmovemd %0,%%fp0-%%fp7\n\t"
+ "fmovel %1,%%fpcr\n\t"
+ "fmovel %2,%%fpsr\n\t"
+ "fmovel %3,%%fpiar"
+ : /* no outputs */
+ : "m" (fpregs.f_fpregs[0]),
+ "m" (fpregs.f_fpcntl[0]),
+ "m" (fpregs.f_fpcntl[1]),
+ "m" (fpregs.f_fpcntl[2]));
+ } else {
+ __asm__ volatile (".chip 68k/68881\n\t"
+ "fmovemx %0,%%fp0-%%fp7\n\t"
+ "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
+ ".chip 68k"
+ : /* no outputs */
+ : "m" (*fpregs.f_fpregs),
+ "m" (*fpregs.f_fpcntl));
+ }
}
if (context_size &&
__copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1,
context_size))
goto out;
- __asm__ volatile (".chip 68k/68881\n\t"
- "frestore %0\n\t"
- ".chip 68k" : : "m" (*fpstate));
+
+ if (CPU_IS_COLDFIRE) {
+ __asm__ volatile ("frestore %0" : : "m" (*fpstate));
+ } else {
+ __asm__ volatile (".chip 68k/68881\n\t"
+ "frestore %0\n\t"
+ ".chip 68k"
+ : : "m" (*fpstate));
+ }
err = 0;
out:
@@ -336,8 +394,12 @@ static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
regs->format = formatvec >> 12;
regs->vector = formatvec & 0xfff;
#define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack))
- __asm__ __volatile__
- (" movel %0,%/a0\n\t"
+ __asm__ __volatile__ (
+#ifdef CONFIG_COLDFIRE
+ " movel %0,%/sp\n\t"
+ " bra ret_from_signal\n"
+#else
+ " movel %0,%/a0\n\t"
" subl %1,%/a0\n\t" /* make room on stack */
" movel %/a0,%/sp\n\t" /* set stack pointer */
/* move switch_stack and pt_regs */
@@ -350,6 +412,7 @@ static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
"2: movel %4@+,%/a0@+\n\t"
" dbra %1,2b\n\t"
" bral ret_from_signal\n"
+#endif
: /* no outputs, it doesn't ever return */
: "a" (sw), "d" (fsize), "d" (frame_offset/4-1),
"n" (frame_offset), "a" (buf + fsize/4)
@@ -516,10 +579,15 @@ static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
return;
}
- __asm__ volatile (".chip 68k/68881\n\t"
- "fsave %0\n\t"
- ".chip 68k"
- : : "m" (*sc->sc_fpstate) : "memory");
+ if (CPU_IS_COLDFIRE) {
+ __asm__ volatile ("fsave %0"
+ : : "m" (*sc->sc_fpstate) : "memory");
+ } else {
+ __asm__ volatile (".chip 68k/68881\n\t"
+ "fsave %0\n\t"
+ ".chip 68k"
+ : : "m" (*sc->sc_fpstate) : "memory");
+ }
if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
fpu_version = sc->sc_fpstate[0];
@@ -530,21 +598,35 @@ static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
if (*(unsigned short *) sc->sc_fpstate == 0x1f38)
sc->sc_fpstate[0x38] |= 1 << 3;
}
- __asm__ volatile (".chip 68k/68881\n\t"
- "fmovemx %%fp0-%%fp1,%0\n\t"
- "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
- ".chip 68k"
- : "=m" (*sc->sc_fpregs),
- "=m" (*sc->sc_fpcntl)
- : /* no inputs */
- : "memory");
+
+ if (CPU_IS_COLDFIRE) {
+ __asm__ volatile ("fmovemd %%fp0-%%fp1,%0\n\t"
+ "fmovel %%fpcr,%1\n\t"
+ "fmovel %%fpsr,%2\n\t"
+ "fmovel %%fpiar,%3"
+ : "=m" (sc->sc_fpregs[0]),
+ "=m" (sc->sc_fpcntl[0]),
+ "=m" (sc->sc_fpcntl[1]),
+ "=m" (sc->sc_fpcntl[2])
+ : /* no inputs */
+ : "memory");
+ } else {
+ __asm__ volatile (".chip 68k/68881\n\t"
+ "fmovemx %%fp0-%%fp1,%0\n\t"
+ "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
+ ".chip 68k"
+ : "=m" (*sc->sc_fpregs),
+ "=m" (*sc->sc_fpcntl)
+ : /* no inputs */
+ : "memory");
+ }
}
}
static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
{
unsigned char fpstate[FPCONTEXT_SIZE];
- int context_size = CPU_IS_060 ? 8 : 0;
+ int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
int err = 0;
if (FPU_IS_EMU) {
@@ -557,15 +639,19 @@ static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *
return err;
}
- __asm__ volatile (".chip 68k/68881\n\t"
- "fsave %0\n\t"
- ".chip 68k"
- : : "m" (*fpstate) : "memory");
+ if (CPU_IS_COLDFIRE) {
+ __asm__ volatile ("fsave %0" : : "m" (*fpstate) : "memory");
+ } else {
+ __asm__ volatile (".chip 68k/68881\n\t"
+ "fsave %0\n\t"
+ ".chip 68k"
+ : : "m" (*fpstate) : "memory");
+ }
err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate);
if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
fpregset_t fpregs;
- if (!CPU_IS_060)
+ if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
context_size = fpstate[1];
fpu_version = fpstate[0];
if (CPU_IS_020_OR_030 &&
@@ -575,14 +661,27 @@ static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *
if (*(unsigned short *) fpstate == 0x1f38)
fpstate[0x38] |= 1 << 3;
}
- __asm__ volatile (".chip 68k/68881\n\t"
- "fmovemx %%fp0-%%fp7,%0\n\t"
- "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
- ".chip 68k"
- : "=m" (*fpregs.f_fpregs),
- "=m" (*fpregs.f_fpcntl)
- : /* no inputs */
- : "memory");
+ if (CPU_IS_COLDFIRE) {
+ __asm__ volatile ("fmovemd %%fp0-%%fp7,%0\n\t"
+ "fmovel %%fpcr,%1\n\t"
+ "fmovel %%fpsr,%2\n\t"
+ "fmovel %%fpiar,%3"
+ : "=m" (fpregs.f_fpregs[0]),
+ "=m" (fpregs.f_fpcntl[0]),
+ "=m" (fpregs.f_fpcntl[1]),
+ "=m" (fpregs.f_fpcntl[2])
+ : /* no inputs */
+ : "memory");
+ } else {
+ __asm__ volatile (".chip 68k/68881\n\t"
+ "fmovemx %%fp0-%%fp7,%0\n\t"
+ "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
+ ".chip 68k"
+ : "=m" (*fpregs.f_fpregs),
+ "=m" (*fpregs.f_fpcntl)
+ : /* no inputs */
+ : "memory");
+ }
err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs,
sizeof(fpregs));
}
@@ -679,8 +778,7 @@ static inline void push_cache (unsigned long vaddr)
"cpushl %%bc,(%0)\n\t"
".chip 68k"
: : "a" (temp));
- }
- else {
+ } else if (!CPU_IS_COLDFIRE) {
/*
* 68030/68020 have no writeback cache;
* still need to clear icache.
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 07:52:18 +0100