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qemu/0084-tcg-sparc-Assume-v9-cpu-always-i.e.-force-v8plus-in-.patch
Cole Robinson 9290838132 Fix boot hang if console is not connected (bz #894451) 
Fix segfault with zero length virtio-scsi disk (bz #847549)
2013-02-02 15:47:37 -05:00

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From cf873edf4227be439a9ffa5abb3da61ff1fd6527 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@twiddle.net>
Date: Fri, 21 Sep 2012 10:34:21 -0700
Subject: [PATCH] tcg-sparc: Assume v9 cpu always, i.e. force v8plus in 32-bit
mode.
Current code doesn't actually work in 32-bit mode at all. Since
no one really noticed, drop the complication of v7 and v8 cpus.
Eliminate the --sparc_cpu configure option and standardize macro
testing on TCG_TARGET_REG_BITS / HOST_LONG_BITS
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
configure | 40 ++++------------------------------------
disas.c | 2 --
exec.c | 6 +++---
qemu-timer.h | 8 +++++---
tcg/sparc/tcg-target.c | 20 +++++---------------
tcg/sparc/tcg-target.h | 7 ++++---
tcg/tcg.c | 3 ++-
7 files changed, 23 insertions(+), 63 deletions(-)
diff --git a/configure b/configure
index 816f0f9..0590f16 100755
--- a/configure
+++ b/configure
@@ -111,7 +111,6 @@ source_path=`dirname "$0"`
cpu=""
interp_prefix="/usr/gnemul/qemu-%M"
static="no"
-sparc_cpu=""
cross_prefix=""
audio_drv_list=""
audio_card_list="ac97 es1370 sb16 hda"
@@ -249,21 +248,6 @@ for opt do
;;
--disable-debug-info) debug_info="no"
;;
- --sparc_cpu=*)
- sparc_cpu="$optarg"
- case $sparc_cpu in
- v7|v8|v8plus|v8plusa)
- cpu="sparc"
- ;;
- v9)
- cpu="sparc64"
- ;;
- *)
- echo "undefined SPARC architecture. Exiting";
- exit 1
- ;;
- esac
- ;;
esac
done
# OS specific
@@ -351,8 +335,6 @@ elif check_define __i386__ ; then
elif check_define __x86_64__ ; then
cpu="x86_64"
elif check_define __sparc__ ; then
- # We can't check for 64 bit (when gcc is biarch) or V8PLUSA
- # They must be specified using --sparc_cpu
if check_define __arch64__ ; then
cpu="sparc64"
else
@@ -798,8 +780,6 @@ for opt do
;;
--enable-uname-release=*) uname_release="$optarg"
;;
- --sparc_cpu=*)
- ;;
--enable-werror) werror="yes"
;;
--disable-werror) werror="no"
@@ -883,31 +863,19 @@ for opt do
esac
done
-#
-# If cpu ~= sparc and sparc_cpu hasn't been defined, plug in the right
-# QEMU_CFLAGS/LDFLAGS (assume sparc_v8plus for 32-bit and sparc_v9 for 64-bit)
-#
host_guest_base="no"
case "$cpu" in
- sparc) case $sparc_cpu in
- v7|v8)
- QEMU_CFLAGS="-mcpu=${sparc_cpu} -D__sparc_${sparc_cpu}__ $QEMU_CFLAGS"
- ;;
- v8plus|v8plusa)
- QEMU_CFLAGS="-mcpu=ultrasparc -D__sparc_${sparc_cpu}__ $QEMU_CFLAGS"
- ;;
- *) # sparc_cpu not defined in the command line
- QEMU_CFLAGS="-mcpu=ultrasparc -D__sparc_v8plus__ $QEMU_CFLAGS"
- esac
+ sparc)
LDFLAGS="-m32 $LDFLAGS"
- QEMU_CFLAGS="-m32 -ffixed-g2 -ffixed-g3 $QEMU_CFLAGS"
+ QEMU_CFLAGS="-m32 -mcpu=ultrasparc $QEMU_CFLAGS"
+ QEMU_CFLAGS="-ffixed-g2 -ffixed-g3 $QEMU_CFLAGS"
if test "$solaris" = "no" ; then
QEMU_CFLAGS="-ffixed-g1 -ffixed-g6 $QEMU_CFLAGS"
fi
;;
sparc64)
- QEMU_CFLAGS="-m64 -mcpu=ultrasparc -D__sparc_v9__ $QEMU_CFLAGS"
LDFLAGS="-m64 $LDFLAGS"
+ QEMU_CFLAGS="-m64 -mcpu=ultrasparc $QEMU_CFLAGS"
QEMU_CFLAGS="-ffixed-g5 -ffixed-g6 -ffixed-g7 $QEMU_CFLAGS"
if test "$solaris" != "no" ; then
QEMU_CFLAGS="-ffixed-g1 $QEMU_CFLAGS"
diff --git a/disas.c b/disas.c
index 7b2acc9..b801c8f 100644
--- a/disas.c
+++ b/disas.c
@@ -316,9 +316,7 @@ void disas(FILE *out, void *code, unsigned long size)
print_insn = print_insn_alpha;
#elif defined(__sparc__)
print_insn = print_insn_sparc;
-#if defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__)
disasm_info.mach = bfd_mach_sparc_v9b;
-#endif
#elif defined(__arm__)
print_insn = print_insn_arm;
#elif defined(__MIPSEB__)
diff --git a/exec.c b/exec.c
index 871a68a..ad175db 100644
--- a/exec.c
+++ b/exec.c
@@ -86,7 +86,7 @@ static int nb_tbs;
/* any access to the tbs or the page table must use this lock */
spinlock_t tb_lock = SPIN_LOCK_UNLOCKED;
-#if defined(__arm__) || defined(__sparc_v9__)
+#if defined(__arm__) || defined(__sparc__)
/* The prologue must be reachable with a direct jump. ARM and Sparc64
have limited branch ranges (possibly also PPC) so place it in a
section close to code segment. */
@@ -541,7 +541,7 @@ static void code_gen_alloc(unsigned long tb_size)
/* Cannot map more than that */
if (code_gen_buffer_size > (800 * 1024 * 1024))
code_gen_buffer_size = (800 * 1024 * 1024);
-#elif defined(__sparc_v9__)
+#elif defined(__sparc__) && HOST_LONG_BITS == 64
// Map the buffer below 2G, so we can use direct calls and branches
start = (void *) 0x40000000UL;
if (code_gen_buffer_size > (512 * 1024 * 1024))
@@ -581,7 +581,7 @@ static void code_gen_alloc(unsigned long tb_size)
/* Cannot map more than that */
if (code_gen_buffer_size > (800 * 1024 * 1024))
code_gen_buffer_size = (800 * 1024 * 1024);
-#elif defined(__sparc_v9__)
+#elif defined(__sparc__) && HOST_LONG_BITS == 64
// Map the buffer below 2G, so we can use direct calls and branches
addr = (void *) 0x40000000UL;
if (code_gen_buffer_size > (512 * 1024 * 1024)) {
diff --git a/qemu-timer.h b/qemu-timer.h
index f8af595..da7e97c 100644
--- a/qemu-timer.h
+++ b/qemu-timer.h
@@ -218,7 +218,7 @@ static inline int64_t cpu_get_real_ticks(void)
return val;
}
-#elif defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__)
+#elif defined(__sparc__)
static inline int64_t cpu_get_real_ticks (void)
{
@@ -227,6 +227,8 @@ static inline int64_t cpu_get_real_ticks (void)
asm volatile("rd %%tick,%0" : "=r"(rval));
return rval;
#else
+ /* We need an %o or %g register for this. For recent enough gcc
+ there is an "h" constraint for that. Don't bother with that. */
union {
uint64_t i64;
struct {
@@ -234,8 +236,8 @@ static inline int64_t cpu_get_real_ticks (void)
uint32_t low;
} i32;
} rval;
- asm volatile("rd %%tick,%1; srlx %1,32,%0"
- : "=r"(rval.i32.high), "=r"(rval.i32.low));
+ asm volatile("rd %%tick,%%g1; srlx %%g1,32,%0; mov %%g1,%1"
+ : "=r"(rval.i32.high), "=r"(rval.i32.low) : : "g1");
return rval.i64;
#endif
}
diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index 0a19313..23c2fda 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -621,18 +621,10 @@ static void tcg_out_setcond_i32(TCGContext *s, TCGCond cond, TCGArg ret,
default:
tcg_out_cmp(s, c1, c2, c2const);
-#if defined(__sparc_v9__) || defined(__sparc_v8plus__)
tcg_out_movi_imm13(s, ret, 0);
- tcg_out32 (s, ARITH_MOVCC | INSN_RD(ret)
- | INSN_RS1(tcg_cond_to_bcond[cond])
- | MOVCC_ICC | INSN_IMM11(1));
-#else
- t = gen_new_label();
- tcg_out_branch_i32(s, INSN_COND(tcg_cond_to_bcond[cond], 1), t);
- tcg_out_movi_imm13(s, ret, 1);
- tcg_out_movi_imm13(s, ret, 0);
- tcg_out_label(s, t, s->code_ptr);
-#endif
+ tcg_out32(s, ARITH_MOVCC | INSN_RD(ret)
+ | INSN_RS1(tcg_cond_to_bcond[cond])
+ | MOVCC_ICC | INSN_IMM11(1));
return;
}
@@ -742,7 +734,7 @@ static const void * const qemu_st_helpers[4] = {
#endif
#endif
-#ifdef __arch64__
+#if TCG_TARGET_REG_BITS == 64
#define HOST_LD_OP LDX
#define HOST_ST_OP STX
#define HOST_SLL_OP SHIFT_SLLX
@@ -1600,11 +1592,9 @@ static void tcg_target_init(TCGContext *s)
#if TCG_TARGET_REG_BITS == 64
# define ELF_HOST_MACHINE EM_SPARCV9
-#elif defined(__sparc_v8plus__)
+#else
# define ELF_HOST_MACHINE EM_SPARC32PLUS
# define ELF_HOST_FLAGS EF_SPARC_32PLUS
-#else
-# define ELF_HOST_MACHINE EM_SPARC
#endif
typedef struct {
diff --git a/tcg/sparc/tcg-target.h b/tcg/sparc/tcg-target.h
index d762574..adca1d2 100644
--- a/tcg/sparc/tcg-target.h
+++ b/tcg/sparc/tcg-target.h
@@ -67,7 +67,8 @@ typedef enum {
/* used for function call generation */
#define TCG_REG_CALL_STACK TCG_REG_I6
-#ifdef __arch64__
+
+#if TCG_TARGET_REG_BITS == 64
// Reserve space for AREG0
#define TCG_TARGET_STACK_MINFRAME (176 + 4 * (int)sizeof(long) + \
TCG_STATIC_CALL_ARGS_SIZE)
@@ -81,7 +82,7 @@ typedef enum {
#define TCG_TARGET_STACK_ALIGN 8
#endif
-#ifdef __arch64__
+#if TCG_TARGET_REG_BITS == 64
#define TCG_TARGET_EXTEND_ARGS 1
#endif
@@ -129,7 +130,7 @@ typedef enum {
#ifdef CONFIG_SOLARIS
#define TCG_AREG0 TCG_REG_G2
-#elif defined(__sparc_v9__)
+#elif HOST_LONG_BITS == 64
#define TCG_AREG0 TCG_REG_G5
#else
#define TCG_AREG0 TCG_REG_G6
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 93421cd..16c4e1d 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1450,7 +1450,8 @@ static void temp_allocate_frame(TCGContext *s, int temp)
{
TCGTemp *ts;
ts = &s->temps[temp];
-#ifndef __sparc_v9__ /* Sparc64 stack is accessed with offset of 2047 */
+#if !(defined(__sparc__) && TCG_TARGET_REG_BITS == 64)
+ /* Sparc64 stack is accessed with offset of 2047 */
s->current_frame_offset = (s->current_frame_offset +
(tcg_target_long)sizeof(tcg_target_long) - 1) &
~(sizeof(tcg_target_long) - 1);
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