You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
729 lines
20 KiB
729 lines
20 KiB
/* $Id: unaligned.c,v 1.24 2002/02/09 19:49:31 davem Exp $
|
|
* unaligned.c: Unaligned load/store trap handling with special
|
|
* cases for the kernel to do them more quickly.
|
|
*
|
|
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
*/
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/module.h>
|
|
#include <asm/asi.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/pstate.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/system.h>
|
|
#include <asm/uaccess.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/smp_lock.h>
|
|
#include <linux/bitops.h>
|
|
#include <asm/fpumacro.h>
|
|
|
|
/* #define DEBUG_MNA */
|
|
|
|
enum direction {
|
|
load, /* ld, ldd, ldh, ldsh */
|
|
store, /* st, std, sth, stsh */
|
|
both, /* Swap, ldstub, cas, ... */
|
|
fpld,
|
|
fpst,
|
|
invalid,
|
|
};
|
|
|
|
#ifdef DEBUG_MNA
|
|
static char *dirstrings[] = {
|
|
"load", "store", "both", "fpload", "fpstore", "invalid"
|
|
};
|
|
#endif
|
|
|
|
static inline enum direction decode_direction(unsigned int insn)
|
|
{
|
|
unsigned long tmp = (insn >> 21) & 1;
|
|
|
|
if (!tmp)
|
|
return load;
|
|
else {
|
|
switch ((insn>>19)&0xf) {
|
|
case 15: /* swap* */
|
|
return both;
|
|
default:
|
|
return store;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 16 = double-word, 8 = extra-word, 4 = word, 2 = half-word */
|
|
static inline int decode_access_size(unsigned int insn)
|
|
{
|
|
unsigned int tmp;
|
|
|
|
tmp = ((insn >> 19) & 0xf);
|
|
if (tmp == 11 || tmp == 14) /* ldx/stx */
|
|
return 8;
|
|
tmp &= 3;
|
|
if (!tmp)
|
|
return 4;
|
|
else if (tmp == 3)
|
|
return 16; /* ldd/std - Although it is actually 8 */
|
|
else if (tmp == 2)
|
|
return 2;
|
|
else {
|
|
printk("Impossible unaligned trap. insn=%08x\n", insn);
|
|
die_if_kernel("Byte sized unaligned access?!?!", current_thread_info()->kregs);
|
|
|
|
/* GCC should never warn that control reaches the end
|
|
* of this function without returning a value because
|
|
* die_if_kernel() is marked with attribute 'noreturn'.
|
|
* Alas, some versions do...
|
|
*/
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static inline int decode_asi(unsigned int insn, struct pt_regs *regs)
|
|
{
|
|
if (insn & 0x800000) {
|
|
if (insn & 0x2000)
|
|
return (unsigned char)(regs->tstate >> 24); /* %asi */
|
|
else
|
|
return (unsigned char)(insn >> 5); /* imm_asi */
|
|
} else
|
|
return ASI_P;
|
|
}
|
|
|
|
/* 0x400000 = signed, 0 = unsigned */
|
|
static inline int decode_signedness(unsigned int insn)
|
|
{
|
|
return (insn & 0x400000);
|
|
}
|
|
|
|
static inline void maybe_flush_windows(unsigned int rs1, unsigned int rs2,
|
|
unsigned int rd, int from_kernel)
|
|
{
|
|
if (rs2 >= 16 || rs1 >= 16 || rd >= 16) {
|
|
if (from_kernel != 0)
|
|
__asm__ __volatile__("flushw");
|
|
else
|
|
flushw_user();
|
|
}
|
|
}
|
|
|
|
static inline long sign_extend_imm13(long imm)
|
|
{
|
|
return imm << 51 >> 51;
|
|
}
|
|
|
|
static unsigned long fetch_reg(unsigned int reg, struct pt_regs *regs)
|
|
{
|
|
unsigned long value;
|
|
|
|
if (reg < 16)
|
|
return (!reg ? 0 : regs->u_regs[reg]);
|
|
if (regs->tstate & TSTATE_PRIV) {
|
|
struct reg_window *win;
|
|
win = (struct reg_window *)(regs->u_regs[UREG_FP] + STACK_BIAS);
|
|
value = win->locals[reg - 16];
|
|
} else if (test_thread_flag(TIF_32BIT)) {
|
|
struct reg_window32 __user *win32;
|
|
win32 = (struct reg_window32 __user *)((unsigned long)((u32)regs->u_regs[UREG_FP]));
|
|
get_user(value, &win32->locals[reg - 16]);
|
|
} else {
|
|
struct reg_window __user *win;
|
|
win = (struct reg_window __user *)(regs->u_regs[UREG_FP] + STACK_BIAS);
|
|
get_user(value, &win->locals[reg - 16]);
|
|
}
|
|
return value;
|
|
}
|
|
|
|
static unsigned long *fetch_reg_addr(unsigned int reg, struct pt_regs *regs)
|
|
{
|
|
if (reg < 16)
|
|
return ®s->u_regs[reg];
|
|
if (regs->tstate & TSTATE_PRIV) {
|
|
struct reg_window *win;
|
|
win = (struct reg_window *)(regs->u_regs[UREG_FP] + STACK_BIAS);
|
|
return &win->locals[reg - 16];
|
|
} else if (test_thread_flag(TIF_32BIT)) {
|
|
struct reg_window32 *win32;
|
|
win32 = (struct reg_window32 *)((unsigned long)((u32)regs->u_regs[UREG_FP]));
|
|
return (unsigned long *)&win32->locals[reg - 16];
|
|
} else {
|
|
struct reg_window *win;
|
|
win = (struct reg_window *)(regs->u_regs[UREG_FP] + STACK_BIAS);
|
|
return &win->locals[reg - 16];
|
|
}
|
|
}
|
|
|
|
unsigned long compute_effective_address(struct pt_regs *regs,
|
|
unsigned int insn, unsigned int rd)
|
|
{
|
|
unsigned int rs1 = (insn >> 14) & 0x1f;
|
|
unsigned int rs2 = insn & 0x1f;
|
|
int from_kernel = (regs->tstate & TSTATE_PRIV) != 0;
|
|
|
|
if (insn & 0x2000) {
|
|
maybe_flush_windows(rs1, 0, rd, from_kernel);
|
|
return (fetch_reg(rs1, regs) + sign_extend_imm13(insn));
|
|
} else {
|
|
maybe_flush_windows(rs1, rs2, rd, from_kernel);
|
|
return (fetch_reg(rs1, regs) + fetch_reg(rs2, regs));
|
|
}
|
|
}
|
|
|
|
/* This is just to make gcc think die_if_kernel does return... */
|
|
static void __attribute_used__ unaligned_panic(char *str, struct pt_regs *regs)
|
|
{
|
|
die_if_kernel(str, regs);
|
|
}
|
|
|
|
#define do_integer_load(dest_reg, size, saddr, is_signed, asi, errh) ({ \
|
|
__asm__ __volatile__ ( \
|
|
"wr %4, 0, %%asi\n\t" \
|
|
"cmp %1, 8\n\t" \
|
|
"bge,pn %%icc, 9f\n\t" \
|
|
" cmp %1, 4\n\t" \
|
|
"be,pt %%icc, 6f\n" \
|
|
"4:\t" " lduba [%2] %%asi, %%l1\n" \
|
|
"5:\t" "lduba [%2 + 1] %%asi, %%l2\n\t" \
|
|
"sll %%l1, 8, %%l1\n\t" \
|
|
"brz,pt %3, 3f\n\t" \
|
|
" add %%l1, %%l2, %%l1\n\t" \
|
|
"sllx %%l1, 48, %%l1\n\t" \
|
|
"srax %%l1, 48, %%l1\n" \
|
|
"3:\t" "ba,pt %%xcc, 0f\n\t" \
|
|
" stx %%l1, [%0]\n" \
|
|
"6:\t" "lduba [%2 + 1] %%asi, %%l2\n\t" \
|
|
"sll %%l1, 24, %%l1\n" \
|
|
"7:\t" "lduba [%2 + 2] %%asi, %%g7\n\t" \
|
|
"sll %%l2, 16, %%l2\n" \
|
|
"8:\t" "lduba [%2 + 3] %%asi, %%g1\n\t" \
|
|
"sll %%g7, 8, %%g7\n\t" \
|
|
"or %%l1, %%l2, %%l1\n\t" \
|
|
"or %%g7, %%g1, %%g7\n\t" \
|
|
"or %%l1, %%g7, %%l1\n\t" \
|
|
"brnz,a,pt %3, 3f\n\t" \
|
|
" sra %%l1, 0, %%l1\n" \
|
|
"3:\t" "ba,pt %%xcc, 0f\n\t" \
|
|
" stx %%l1, [%0]\n" \
|
|
"9:\t" "lduba [%2] %%asi, %%l1\n" \
|
|
"10:\t" "lduba [%2 + 1] %%asi, %%l2\n\t" \
|
|
"sllx %%l1, 56, %%l1\n" \
|
|
"11:\t" "lduba [%2 + 2] %%asi, %%g7\n\t" \
|
|
"sllx %%l2, 48, %%l2\n" \
|
|
"12:\t" "lduba [%2 + 3] %%asi, %%g1\n\t" \
|
|
"sllx %%g7, 40, %%g7\n\t" \
|
|
"sllx %%g1, 32, %%g1\n\t" \
|
|
"or %%l1, %%l2, %%l1\n\t" \
|
|
"or %%g7, %%g1, %%g7\n" \
|
|
"13:\t" "lduba [%2 + 4] %%asi, %%l2\n\t" \
|
|
"or %%l1, %%g7, %%g7\n" \
|
|
"14:\t" "lduba [%2 + 5] %%asi, %%g1\n\t" \
|
|
"sllx %%l2, 24, %%l2\n" \
|
|
"15:\t" "lduba [%2 + 6] %%asi, %%l1\n\t" \
|
|
"sllx %%g1, 16, %%g1\n\t" \
|
|
"or %%g7, %%l2, %%g7\n" \
|
|
"16:\t" "lduba [%2 + 7] %%asi, %%l2\n\t" \
|
|
"sllx %%l1, 8, %%l1\n\t" \
|
|
"or %%g7, %%g1, %%g7\n\t" \
|
|
"or %%l1, %%l2, %%l1\n\t" \
|
|
"or %%g7, %%l1, %%g7\n\t" \
|
|
"cmp %1, 8\n\t" \
|
|
"be,a,pt %%icc, 0f\n\t" \
|
|
" stx %%g7, [%0]\n\t" \
|
|
"srlx %%g7, 32, %%l1\n\t" \
|
|
"sra %%g7, 0, %%g7\n\t" \
|
|
"stx %%l1, [%0]\n\t" \
|
|
"stx %%g7, [%0 + 8]\n" \
|
|
"0:\n\t" \
|
|
"wr %%g0, %5, %%asi\n\n\t" \
|
|
".section __ex_table\n\t" \
|
|
".word 4b, " #errh "\n\t" \
|
|
".word 5b, " #errh "\n\t" \
|
|
".word 6b, " #errh "\n\t" \
|
|
".word 7b, " #errh "\n\t" \
|
|
".word 8b, " #errh "\n\t" \
|
|
".word 9b, " #errh "\n\t" \
|
|
".word 10b, " #errh "\n\t" \
|
|
".word 11b, " #errh "\n\t" \
|
|
".word 12b, " #errh "\n\t" \
|
|
".word 13b, " #errh "\n\t" \
|
|
".word 14b, " #errh "\n\t" \
|
|
".word 15b, " #errh "\n\t" \
|
|
".word 16b, " #errh "\n\n\t" \
|
|
".previous\n\t" \
|
|
: : "r" (dest_reg), "r" (size), "r" (saddr), "r" (is_signed), \
|
|
"r" (asi), "i" (ASI_AIUS) \
|
|
: "l1", "l2", "g7", "g1", "cc"); \
|
|
})
|
|
|
|
#define store_common(dst_addr, size, src_val, asi, errh) ({ \
|
|
__asm__ __volatile__ ( \
|
|
"wr %3, 0, %%asi\n\t" \
|
|
"ldx [%2], %%l1\n" \
|
|
"cmp %1, 2\n\t" \
|
|
"be,pn %%icc, 2f\n\t" \
|
|
" cmp %1, 4\n\t" \
|
|
"be,pt %%icc, 1f\n\t" \
|
|
" srlx %%l1, 24, %%l2\n\t" \
|
|
"srlx %%l1, 56, %%g1\n\t" \
|
|
"srlx %%l1, 48, %%g7\n" \
|
|
"4:\t" "stba %%g1, [%0] %%asi\n\t" \
|
|
"srlx %%l1, 40, %%g1\n" \
|
|
"5:\t" "stba %%g7, [%0 + 1] %%asi\n\t" \
|
|
"srlx %%l1, 32, %%g7\n" \
|
|
"6:\t" "stba %%g1, [%0 + 2] %%asi\n" \
|
|
"7:\t" "stba %%g7, [%0 + 3] %%asi\n\t" \
|
|
"srlx %%l1, 16, %%g1\n" \
|
|
"8:\t" "stba %%l2, [%0 + 4] %%asi\n\t" \
|
|
"srlx %%l1, 8, %%g7\n" \
|
|
"9:\t" "stba %%g1, [%0 + 5] %%asi\n" \
|
|
"10:\t" "stba %%g7, [%0 + 6] %%asi\n\t" \
|
|
"ba,pt %%xcc, 0f\n" \
|
|
"11:\t" " stba %%l1, [%0 + 7] %%asi\n" \
|
|
"1:\t" "srl %%l1, 16, %%g7\n" \
|
|
"12:\t" "stba %%l2, [%0] %%asi\n\t" \
|
|
"srl %%l1, 8, %%l2\n" \
|
|
"13:\t" "stba %%g7, [%0 + 1] %%asi\n" \
|
|
"14:\t" "stba %%l2, [%0 + 2] %%asi\n\t" \
|
|
"ba,pt %%xcc, 0f\n" \
|
|
"15:\t" " stba %%l1, [%0 + 3] %%asi\n" \
|
|
"2:\t" "srl %%l1, 8, %%l2\n" \
|
|
"16:\t" "stba %%l2, [%0] %%asi\n" \
|
|
"17:\t" "stba %%l1, [%0 + 1] %%asi\n" \
|
|
"0:\n\t" \
|
|
"wr %%g0, %4, %%asi\n\n\t" \
|
|
".section __ex_table\n\t" \
|
|
".word 4b, " #errh "\n\t" \
|
|
".word 5b, " #errh "\n\t" \
|
|
".word 6b, " #errh "\n\t" \
|
|
".word 7b, " #errh "\n\t" \
|
|
".word 8b, " #errh "\n\t" \
|
|
".word 9b, " #errh "\n\t" \
|
|
".word 10b, " #errh "\n\t" \
|
|
".word 11b, " #errh "\n\t" \
|
|
".word 12b, " #errh "\n\t" \
|
|
".word 13b, " #errh "\n\t" \
|
|
".word 14b, " #errh "\n\t" \
|
|
".word 15b, " #errh "\n\t" \
|
|
".word 16b, " #errh "\n\t" \
|
|
".word 17b, " #errh "\n\n\t" \
|
|
".previous\n\t" \
|
|
: : "r" (dst_addr), "r" (size), "r" (src_val), "r" (asi), "i" (ASI_AIUS)\
|
|
: "l1", "l2", "g7", "g1", "cc"); \
|
|
})
|
|
|
|
#define do_integer_store(reg_num, size, dst_addr, regs, asi, errh) ({ \
|
|
unsigned long zero = 0; \
|
|
unsigned long *src_val = &zero; \
|
|
\
|
|
if (size == 16) { \
|
|
size = 8; \
|
|
zero = (((long)(reg_num ? \
|
|
(unsigned)fetch_reg(reg_num, regs) : 0)) << 32) | \
|
|
(unsigned)fetch_reg(reg_num + 1, regs); \
|
|
} else if (reg_num) src_val = fetch_reg_addr(reg_num, regs); \
|
|
store_common(dst_addr, size, src_val, asi, errh); \
|
|
})
|
|
|
|
extern void smp_capture(void);
|
|
extern void smp_release(void);
|
|
|
|
#define do_atomic(srcdest_reg, mem, errh) ({ \
|
|
unsigned long flags, tmp; \
|
|
\
|
|
smp_capture(); \
|
|
local_irq_save(flags); \
|
|
tmp = *srcdest_reg; \
|
|
do_integer_load(srcdest_reg, 4, mem, 0, errh); \
|
|
store_common(mem, 4, &tmp, errh); \
|
|
local_irq_restore(flags); \
|
|
smp_release(); \
|
|
})
|
|
|
|
static inline void advance(struct pt_regs *regs)
|
|
{
|
|
regs->tpc = regs->tnpc;
|
|
regs->tnpc += 4;
|
|
if (test_thread_flag(TIF_32BIT)) {
|
|
regs->tpc &= 0xffffffff;
|
|
regs->tnpc &= 0xffffffff;
|
|
}
|
|
}
|
|
|
|
static inline int floating_point_load_or_store_p(unsigned int insn)
|
|
{
|
|
return (insn >> 24) & 1;
|
|
}
|
|
|
|
static inline int ok_for_kernel(unsigned int insn)
|
|
{
|
|
return !floating_point_load_or_store_p(insn);
|
|
}
|
|
|
|
void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn) __asm__ ("kernel_mna_trap_fault");
|
|
|
|
void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
|
|
{
|
|
unsigned long g2 = regs->u_regs [UREG_G2];
|
|
unsigned long fixup = search_extables_range(regs->tpc, &g2);
|
|
|
|
if (!fixup) {
|
|
unsigned long address = compute_effective_address(regs, insn, ((insn >> 25) & 0x1f));
|
|
if (address < PAGE_SIZE) {
|
|
printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference in mna handler");
|
|
} else
|
|
printk(KERN_ALERT "Unable to handle kernel paging request in mna handler");
|
|
printk(KERN_ALERT " at virtual address %016lx\n",address);
|
|
printk(KERN_ALERT "current->{mm,active_mm}->context = %016lx\n",
|
|
(current->mm ? CTX_HWBITS(current->mm->context) :
|
|
CTX_HWBITS(current->active_mm->context)));
|
|
printk(KERN_ALERT "current->{mm,active_mm}->pgd = %016lx\n",
|
|
(current->mm ? (unsigned long) current->mm->pgd :
|
|
(unsigned long) current->active_mm->pgd));
|
|
die_if_kernel("Oops", regs);
|
|
/* Not reached */
|
|
}
|
|
regs->tpc = fixup;
|
|
regs->tnpc = regs->tpc + 4;
|
|
regs->u_regs [UREG_G2] = g2;
|
|
|
|
regs->tstate &= ~TSTATE_ASI;
|
|
regs->tstate |= (ASI_AIUS << 24UL);
|
|
}
|
|
|
|
asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn, unsigned long sfar, unsigned long sfsr)
|
|
{
|
|
enum direction dir = decode_direction(insn);
|
|
int size = decode_access_size(insn);
|
|
|
|
if (!ok_for_kernel(insn) || dir == both) {
|
|
printk("Unsupported unaligned load/store trap for kernel at <%016lx>.\n",
|
|
regs->tpc);
|
|
unaligned_panic("Kernel does fpu/atomic unaligned load/store.", regs);
|
|
|
|
__asm__ __volatile__ ("\n"
|
|
"kernel_unaligned_trap_fault:\n\t"
|
|
"mov %0, %%o0\n\t"
|
|
"call kernel_mna_trap_fault\n\t"
|
|
" mov %1, %%o1\n\t"
|
|
:
|
|
: "r" (regs), "r" (insn)
|
|
: "o0", "o1", "o2", "o3", "o4", "o5", "o7",
|
|
"g1", "g2", "g3", "g4", "g7", "cc");
|
|
} else {
|
|
unsigned long addr = compute_effective_address(regs, insn, ((insn >> 25) & 0x1f));
|
|
|
|
#ifdef DEBUG_MNA
|
|
printk("KMNA: pc=%016lx [dir=%s addr=%016lx size=%d] retpc[%016lx]\n",
|
|
regs->tpc, dirstrings[dir], addr, size, regs->u_regs[UREG_RETPC]);
|
|
#endif
|
|
switch (dir) {
|
|
case load:
|
|
do_integer_load(fetch_reg_addr(((insn>>25)&0x1f), regs),
|
|
size, (unsigned long *) addr,
|
|
decode_signedness(insn), decode_asi(insn, regs),
|
|
kernel_unaligned_trap_fault);
|
|
break;
|
|
|
|
case store:
|
|
do_integer_store(((insn>>25)&0x1f), size,
|
|
(unsigned long *) addr, regs,
|
|
decode_asi(insn, regs),
|
|
kernel_unaligned_trap_fault);
|
|
break;
|
|
#if 0 /* unsupported */
|
|
case both:
|
|
do_atomic(fetch_reg_addr(((insn>>25)&0x1f), regs),
|
|
(unsigned long *) addr,
|
|
kernel_unaligned_trap_fault);
|
|
break;
|
|
#endif
|
|
default:
|
|
panic("Impossible kernel unaligned trap.");
|
|
/* Not reached... */
|
|
}
|
|
advance(regs);
|
|
}
|
|
}
|
|
|
|
static char popc_helper[] = {
|
|
0, 1, 1, 2, 1, 2, 2, 3,
|
|
1, 2, 2, 3, 2, 3, 3, 4,
|
|
};
|
|
|
|
int handle_popc(u32 insn, struct pt_regs *regs)
|
|
{
|
|
u64 value;
|
|
int ret, i, rd = ((insn >> 25) & 0x1f);
|
|
int from_kernel = (regs->tstate & TSTATE_PRIV) != 0;
|
|
|
|
if (insn & 0x2000) {
|
|
maybe_flush_windows(0, 0, rd, from_kernel);
|
|
value = sign_extend_imm13(insn);
|
|
} else {
|
|
maybe_flush_windows(0, insn & 0x1f, rd, from_kernel);
|
|
value = fetch_reg(insn & 0x1f, regs);
|
|
}
|
|
for (ret = 0, i = 0; i < 16; i++) {
|
|
ret += popc_helper[value & 0xf];
|
|
value >>= 4;
|
|
}
|
|
if (rd < 16) {
|
|
if (rd)
|
|
regs->u_regs[rd] = ret;
|
|
} else {
|
|
if (test_thread_flag(TIF_32BIT)) {
|
|
struct reg_window32 __user *win32;
|
|
win32 = (struct reg_window32 __user *)((unsigned long)((u32)regs->u_regs[UREG_FP]));
|
|
put_user(ret, &win32->locals[rd - 16]);
|
|
} else {
|
|
struct reg_window __user *win;
|
|
win = (struct reg_window __user *)(regs->u_regs[UREG_FP] + STACK_BIAS);
|
|
put_user(ret, &win->locals[rd - 16]);
|
|
}
|
|
}
|
|
advance(regs);
|
|
return 1;
|
|
}
|
|
|
|
extern void do_fpother(struct pt_regs *regs);
|
|
extern void do_privact(struct pt_regs *regs);
|
|
extern void data_access_exception(struct pt_regs *regs,
|
|
unsigned long sfsr,
|
|
unsigned long sfar);
|
|
|
|
int handle_ldf_stq(u32 insn, struct pt_regs *regs)
|
|
{
|
|
unsigned long addr = compute_effective_address(regs, insn, 0);
|
|
int freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
|
|
struct fpustate *f = FPUSTATE;
|
|
int asi = decode_asi(insn, regs);
|
|
int flag = (freg < 32) ? FPRS_DL : FPRS_DU;
|
|
|
|
save_and_clear_fpu();
|
|
current_thread_info()->xfsr[0] &= ~0x1c000;
|
|
if (freg & 3) {
|
|
current_thread_info()->xfsr[0] |= (6 << 14) /* invalid_fp_register */;
|
|
do_fpother(regs);
|
|
return 0;
|
|
}
|
|
if (insn & 0x200000) {
|
|
/* STQ */
|
|
u64 first = 0, second = 0;
|
|
|
|
if (current_thread_info()->fpsaved[0] & flag) {
|
|
first = *(u64 *)&f->regs[freg];
|
|
second = *(u64 *)&f->regs[freg+2];
|
|
}
|
|
if (asi < 0x80) {
|
|
do_privact(regs);
|
|
return 1;
|
|
}
|
|
switch (asi) {
|
|
case ASI_P:
|
|
case ASI_S: break;
|
|
case ASI_PL:
|
|
case ASI_SL:
|
|
{
|
|
/* Need to convert endians */
|
|
u64 tmp = __swab64p(&first);
|
|
|
|
first = __swab64p(&second);
|
|
second = tmp;
|
|
break;
|
|
}
|
|
default:
|
|
data_access_exception(regs, 0, addr);
|
|
return 1;
|
|
}
|
|
if (put_user (first >> 32, (u32 __user *)addr) ||
|
|
__put_user ((u32)first, (u32 __user *)(addr + 4)) ||
|
|
__put_user (second >> 32, (u32 __user *)(addr + 8)) ||
|
|
__put_user ((u32)second, (u32 __user *)(addr + 12))) {
|
|
data_access_exception(regs, 0, addr);
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* LDF, LDDF, LDQF */
|
|
u32 data[4] __attribute__ ((aligned(8)));
|
|
int size, i;
|
|
int err;
|
|
|
|
if (asi < 0x80) {
|
|
do_privact(regs);
|
|
return 1;
|
|
} else if (asi > ASI_SNFL) {
|
|
data_access_exception(regs, 0, addr);
|
|
return 1;
|
|
}
|
|
switch (insn & 0x180000) {
|
|
case 0x000000: size = 1; break;
|
|
case 0x100000: size = 4; break;
|
|
default: size = 2; break;
|
|
}
|
|
for (i = 0; i < size; i++)
|
|
data[i] = 0;
|
|
|
|
err = get_user (data[0], (u32 __user *) addr);
|
|
if (!err) {
|
|
for (i = 1; i < size; i++)
|
|
err |= __get_user (data[i], (u32 __user *)(addr + 4*i));
|
|
}
|
|
if (err && !(asi & 0x2 /* NF */)) {
|
|
data_access_exception(regs, 0, addr);
|
|
return 1;
|
|
}
|
|
if (asi & 0x8) /* Little */ {
|
|
u64 tmp;
|
|
|
|
switch (size) {
|
|
case 1: data[0] = le32_to_cpup(data + 0); break;
|
|
default:*(u64 *)(data + 0) = le64_to_cpup((u64 *)(data + 0));
|
|
break;
|
|
case 4: tmp = le64_to_cpup((u64 *)(data + 0));
|
|
*(u64 *)(data + 0) = le64_to_cpup((u64 *)(data + 2));
|
|
*(u64 *)(data + 2) = tmp;
|
|
break;
|
|
}
|
|
}
|
|
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) {
|
|
current_thread_info()->fpsaved[0] = FPRS_FEF;
|
|
current_thread_info()->gsr[0] = 0;
|
|
}
|
|
if (!(current_thread_info()->fpsaved[0] & flag)) {
|
|
if (freg < 32)
|
|
memset(f->regs, 0, 32*sizeof(u32));
|
|
else
|
|
memset(f->regs+32, 0, 32*sizeof(u32));
|
|
}
|
|
memcpy(f->regs + freg, data, size * 4);
|
|
current_thread_info()->fpsaved[0] |= flag;
|
|
}
|
|
advance(regs);
|
|
return 1;
|
|
}
|
|
|
|
void handle_ld_nf(u32 insn, struct pt_regs *regs)
|
|
{
|
|
int rd = ((insn >> 25) & 0x1f);
|
|
int from_kernel = (regs->tstate & TSTATE_PRIV) != 0;
|
|
unsigned long *reg;
|
|
|
|
maybe_flush_windows(0, 0, rd, from_kernel);
|
|
reg = fetch_reg_addr(rd, regs);
|
|
if (from_kernel || rd < 16) {
|
|
reg[0] = 0;
|
|
if ((insn & 0x780000) == 0x180000)
|
|
reg[1] = 0;
|
|
} else if (test_thread_flag(TIF_32BIT)) {
|
|
put_user(0, (int __user *) reg);
|
|
if ((insn & 0x780000) == 0x180000)
|
|
put_user(0, ((int __user *) reg) + 1);
|
|
} else {
|
|
put_user(0, (unsigned long __user *) reg);
|
|
if ((insn & 0x780000) == 0x180000)
|
|
put_user(0, (unsigned long __user *) reg + 1);
|
|
}
|
|
advance(regs);
|
|
}
|
|
|
|
void handle_lddfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
|
|
{
|
|
unsigned long pc = regs->tpc;
|
|
unsigned long tstate = regs->tstate;
|
|
u32 insn;
|
|
u32 first, second;
|
|
u64 value;
|
|
u8 asi, freg;
|
|
int flag;
|
|
struct fpustate *f = FPUSTATE;
|
|
|
|
if (tstate & TSTATE_PRIV)
|
|
die_if_kernel("lddfmna from kernel", regs);
|
|
if (test_thread_flag(TIF_32BIT))
|
|
pc = (u32)pc;
|
|
if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
|
|
asi = sfsr >> 16;
|
|
if ((asi > ASI_SNFL) ||
|
|
(asi < ASI_P))
|
|
goto daex;
|
|
if (get_user(first, (u32 __user *)sfar) ||
|
|
get_user(second, (u32 __user *)(sfar + 4))) {
|
|
if (asi & 0x2) /* NF */ {
|
|
first = 0; second = 0;
|
|
} else
|
|
goto daex;
|
|
}
|
|
save_and_clear_fpu();
|
|
freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
|
|
value = (((u64)first) << 32) | second;
|
|
if (asi & 0x8) /* Little */
|
|
value = __swab64p(&value);
|
|
flag = (freg < 32) ? FPRS_DL : FPRS_DU;
|
|
if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) {
|
|
current_thread_info()->fpsaved[0] = FPRS_FEF;
|
|
current_thread_info()->gsr[0] = 0;
|
|
}
|
|
if (!(current_thread_info()->fpsaved[0] & flag)) {
|
|
if (freg < 32)
|
|
memset(f->regs, 0, 32*sizeof(u32));
|
|
else
|
|
memset(f->regs+32, 0, 32*sizeof(u32));
|
|
}
|
|
*(u64 *)(f->regs + freg) = value;
|
|
current_thread_info()->fpsaved[0] |= flag;
|
|
} else {
|
|
daex: data_access_exception(regs, sfsr, sfar);
|
|
return;
|
|
}
|
|
advance(regs);
|
|
return;
|
|
}
|
|
|
|
void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr)
|
|
{
|
|
unsigned long pc = regs->tpc;
|
|
unsigned long tstate = regs->tstate;
|
|
u32 insn;
|
|
u64 value;
|
|
u8 asi, freg;
|
|
int flag;
|
|
struct fpustate *f = FPUSTATE;
|
|
|
|
if (tstate & TSTATE_PRIV)
|
|
die_if_kernel("stdfmna from kernel", regs);
|
|
if (test_thread_flag(TIF_32BIT))
|
|
pc = (u32)pc;
|
|
if (get_user(insn, (u32 __user *) pc) != -EFAULT) {
|
|
freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20);
|
|
asi = sfsr >> 16;
|
|
value = 0;
|
|
flag = (freg < 32) ? FPRS_DL : FPRS_DU;
|
|
if ((asi > ASI_SNFL) ||
|
|
(asi < ASI_P))
|
|
goto daex;
|
|
save_and_clear_fpu();
|
|
if (current_thread_info()->fpsaved[0] & flag)
|
|
value = *(u64 *)&f->regs[freg];
|
|
switch (asi) {
|
|
case ASI_P:
|
|
case ASI_S: break;
|
|
case ASI_PL:
|
|
case ASI_SL:
|
|
value = __swab64p(&value); break;
|
|
default: goto daex;
|
|
}
|
|
if (put_user (value >> 32, (u32 __user *) sfar) ||
|
|
__put_user ((u32)value, (u32 __user *)(sfar + 4)))
|
|
goto daex;
|
|
} else {
|
|
daex: data_access_exception(regs, sfsr, sfar);
|
|
return;
|
|
}
|
|
advance(regs);
|
|
return;
|
|
}
|
|
|