diff options
author | Richard Purdie <rpurdie@rpsys.net> | 2006-08-26 16:49:16 +0000 |
---|---|---|
committer | Richard Purdie <rpurdie@rpsys.net> | 2006-08-26 16:49:16 +0000 |
commit | 0814eff011ab9a23abc7681b4236b05b5b9927df (patch) | |
tree | aba8397be8cedc9c5ce5d45dad90676491c36f09 /packages/qemu/qemu-0.8.0/arm_nptl.patch | |
parent | de16ac5ca528bba54214c4e8c145fa5b3bb21ba4 (diff) |
qemu: Add arm nptl patch (as used in scratchbox) to fix EABI locale generation, add version 0.8.2, apply patches to some fixed verisons
Diffstat (limited to 'packages/qemu/qemu-0.8.0/arm_nptl.patch')
-rw-r--r-- | packages/qemu/qemu-0.8.0/arm_nptl.patch | 854 |
1 files changed, 854 insertions, 0 deletions
diff --git a/packages/qemu/qemu-0.8.0/arm_nptl.patch b/packages/qemu/qemu-0.8.0/arm_nptl.patch new file mode 100644 index 0000000000..daf105071c --- /dev/null +++ b/packages/qemu/qemu-0.8.0/arm_nptl.patch @@ -0,0 +1,854 @@ +diff -ur qemu-0.8.0.orig/configure qemu-0.8.0/configure +--- qemu-0.8.0.orig/configure 2005-12-20 00:51:53.000000000 +0200 ++++ qemu-0.8.0/configure 2006-07-12 15:26:40.000000000 +0300 +@@ -89,6 +89,7 @@ + cocoa="no" + check_gfx="yes" + check_gcc="yes" ++nptl=yes + + # OS specific + targetos=`uname -s` +@@ -205,6 +206,8 @@ + ;; + --disable-gcc-check) check_gcc="no" + ;; ++ --disable-nptl) nptl="no" ++ ;; + esac + done + +@@ -299,6 +302,23 @@ + fi + fi + ++# check NPTL support ++cat > $TMPC <<EOF ++#include <sched.h> ++void foo() ++{ ++#ifndef CLONE_SETTLS ++#error bork ++#endif ++} ++EOF ++ ++if $cc -c -o $TMPO $TMPC 2> /dev/null ; then ++ : ++else ++ nptl="no" ++fi ++ + ########################################## + # SDL probe + +@@ -489,6 +509,7 @@ + fi + echo "" + echo "kqemu support $kqemu" ++echo "NPTL support $nptl" + if test $kqemu = "yes" -a $linux = "yes" ; then + echo "" + echo "KQEMU Linux module configuration:" +@@ -793,6 +814,14 @@ + fi + echo "" >> $config_mak + fi ++else ++ if test "$nptl" = "yes" ; then ++ case "$target_cpu" in ++ arm | armeb) ++ echo "#define USE_NPTL 1" >> $config_h ++ ;; ++ esac ++ fi + fi + + if test "$cocoa" = "yes" ; then +Only in qemu-0.8.0: configure.rej~ +Only in qemu-0.8.0: configure~ +diff -ur qemu-0.8.0.orig/exec-all.h qemu-0.8.0/exec-all.h +--- qemu-0.8.0.orig/exec-all.h 2005-12-20 00:51:53.000000000 +0200 ++++ qemu-0.8.0/exec-all.h 2006-07-12 15:23:46.000000000 +0300 +@@ -347,163 +347,7 @@ + extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4]; + extern void *io_mem_opaque[IO_MEM_NB_ENTRIES]; + +-#ifdef __powerpc__ +-static inline int testandset (int *p) +-{ +- int ret; +- __asm__ __volatile__ ( +- "0: lwarx %0,0,%1\n" +- " xor. %0,%3,%0\n" +- " bne 1f\n" +- " stwcx. %2,0,%1\n" +- " bne- 0b\n" +- "1: " +- : "=&r" (ret) +- : "r" (p), "r" (1), "r" (0) +- : "cr0", "memory"); +- return ret; +-} +-#endif +- +-#ifdef __i386__ +-static inline int testandset (int *p) +-{ +- long int readval = 0; +- +- __asm__ __volatile__ ("lock; cmpxchgl %2, %0" +- : "+m" (*p), "+a" (readval) +- : "r" (1) +- : "cc"); +- return readval; +-} +-#endif +- +-#ifdef __x86_64__ +-static inline int testandset (int *p) +-{ +- long int readval = 0; +- +- __asm__ __volatile__ ("lock; cmpxchgl %2, %0" +- : "+m" (*p), "+a" (readval) +- : "r" (1) +- : "cc"); +- return readval; +-} +-#endif +- +-#ifdef __s390__ +-static inline int testandset (int *p) +-{ +- int ret; +- +- __asm__ __volatile__ ("0: cs %0,%1,0(%2)\n" +- " jl 0b" +- : "=&d" (ret) +- : "r" (1), "a" (p), "0" (*p) +- : "cc", "memory" ); +- return ret; +-} +-#endif +- +-#ifdef __alpha__ +-static inline int testandset (int *p) +-{ +- int ret; +- unsigned long one; +- +- __asm__ __volatile__ ("0: mov 1,%2\n" +- " ldl_l %0,%1\n" +- " stl_c %2,%1\n" +- " beq %2,1f\n" +- ".subsection 2\n" +- "1: br 0b\n" +- ".previous" +- : "=r" (ret), "=m" (*p), "=r" (one) +- : "m" (*p)); +- return ret; +-} +-#endif +- +-#ifdef __sparc__ +-static inline int testandset (int *p) +-{ +- int ret; +- +- __asm__ __volatile__("ldstub [%1], %0" +- : "=r" (ret) +- : "r" (p) +- : "memory"); +- +- return (ret ? 1 : 0); +-} +-#endif +- +-#ifdef __arm__ +-static inline int testandset (int *spinlock) +-{ +- register unsigned int ret; +- __asm__ __volatile__("swp %0, %1, [%2]" +- : "=r"(ret) +- : "0"(1), "r"(spinlock)); +- +- return ret; +-} +-#endif +- +-#ifdef __mc68000 +-static inline int testandset (int *p) +-{ +- char ret; +- __asm__ __volatile__("tas %1; sne %0" +- : "=r" (ret) +- : "m" (p) +- : "cc","memory"); +- return ret; +-} +-#endif +- +-#ifdef __ia64 +-#include <ia64intrin.h> +- +-static inline int testandset (int *p) +-{ +- return __sync_lock_test_and_set (p, 1); +-} +-#endif +- +-typedef int spinlock_t; +- +-#define SPIN_LOCK_UNLOCKED 0 +- +-#if defined(CONFIG_USER_ONLY) +-static inline void spin_lock(spinlock_t *lock) +-{ +- while (testandset(lock)); +-} +- +-static inline void spin_unlock(spinlock_t *lock) +-{ +- *lock = 0; +-} +- +-static inline int spin_trylock(spinlock_t *lock) +-{ +- return !testandset(lock); +-} +-#else +-static inline void spin_lock(spinlock_t *lock) +-{ +-} +- +-static inline void spin_unlock(spinlock_t *lock) +-{ +-} +- +-static inline int spin_trylock(spinlock_t *lock) +-{ +- return 1; +-} +-#endif ++#include "qemu_spinlock.h" + + extern spinlock_t tb_lock; + +diff -ur qemu-0.8.0.orig/linux-user/arm/syscall.h qemu-0.8.0/linux-user/arm/syscall.h +--- qemu-0.8.0.orig/linux-user/arm/syscall.h 2005-12-20 00:51:53.000000000 +0200 ++++ qemu-0.8.0/linux-user/arm/syscall.h 2006-07-12 15:23:46.000000000 +0300 +@@ -28,7 +28,9 @@ + #define ARM_SYSCALL_BASE 0x900000 + #define ARM_THUMB_SYSCALL 0 + +-#define ARM_NR_cacheflush (ARM_SYSCALL_BASE + 0xf0000 + 2) ++#define ARM_NR_BASE 0xf0000 ++#define ARM_NR_cacheflush (ARM_NR_BASE + 2) ++#define ARM_NR_set_tls (ARM_NR_BASE + 5) + + #define ARM_NR_semihosting 0x123456 + #define ARM_NR_thumb_semihosting 0xAB +diff -ur qemu-0.8.0.orig/linux-user/main.c qemu-0.8.0/linux-user/main.c +--- qemu-0.8.0.orig/linux-user/main.c 2006-07-12 15:20:37.000000000 +0300 ++++ qemu-0.8.0/linux-user/main.c 2006-07-12 15:23:46.000000000 +0300 +@@ -326,6 +326,50 @@ + } + } + ++/* Handle a jump to the kernel code page. */ ++static int ++do_kernel_trap(CPUARMState *env) ++{ ++ uint32_t addr; ++ uint32_t *ptr; ++ uint32_t cpsr; ++ ++ switch (env->regs[15]) { ++ case 0xffff0fc0: /* __kernel_cmpxchg */ ++ /* XXX: This only works between threads, not between processes. ++ Use native atomic operations. */ ++ /* ??? This probably breaks horribly if the access segfaults. */ ++ cpu_lock(); ++ ptr = (uint32_t *)env->regs[2]; ++ cpsr = cpsr_read(env); ++ if (*ptr == env->regs[0]) { ++ *ptr = env->regs[1]; ++ env->regs[0] = 0; ++ cpsr |= CPSR_C; ++ } else { ++ env->regs[0] = -1; ++ cpsr &= ~CPSR_C; ++ } ++ cpsr_write(env, cpsr, CPSR_C); ++ cpu_unlock(); ++ break; ++ case 0xffff0fe0: /* __kernel_get_tls */ ++ env->regs[0] = env->cp15.c13_tls; ++ break; ++ default: ++ return 1; ++ } ++ /* Jump back to the caller. */ ++ addr = env->regs[14]; ++ if (addr & 1) { ++ env->thumb = 1; ++ addr &= ~1; ++ } ++ env->regs[15] = addr; ++ ++ return 0; ++} ++ + void cpu_loop(CPUARMState *env) + { + int trapnr; +@@ -368,10 +412,8 @@ + n = insn & 0xffffff; + } + +- if (n == ARM_NR_cacheflush) { +- arm_cache_flush(env->regs[0], env->regs[1]); +- } else if (n == ARM_NR_semihosting +- || n == ARM_NR_thumb_semihosting) { ++ if (n == ARM_NR_semihosting ++ || n == ARM_NR_thumb_semihosting) { + env->regs[0] = do_arm_semihosting (env); + } else if (n >= ARM_SYSCALL_BASE + || (env->thumb && n == ARM_THUMB_SYSCALL)) { +@@ -381,14 +423,34 @@ + } else { + n -= ARM_SYSCALL_BASE; + } +- env->regs[0] = do_syscall(env, +- n, +- env->regs[0], +- env->regs[1], +- env->regs[2], +- env->regs[3], +- env->regs[4], +- env->regs[5]); ++ if ( n > ARM_NR_BASE) { ++ switch (n) ++ { ++ case ARM_NR_cacheflush: ++ arm_cache_flush(env->regs[0], env->regs[1]); ++ break; ++#ifdef USE_NPTL ++ case ARM_NR_set_tls: ++ cpu_set_tls(env, env->regs[0]); ++ env->regs[0] = 0; ++ break; ++#endif ++ default: ++ printf ("Error: Bad syscall: %x\n", n); ++ goto error; ++ } ++ } ++ else ++ { ++ env->regs[0] = do_syscall(env, ++ n, ++ env->regs[0], ++ env->regs[1], ++ env->regs[2], ++ env->regs[3], ++ env->regs[4], ++ env->regs[5]); ++ } + } else { + goto error; + } +@@ -427,6 +489,10 @@ + } + } + break; ++ case EXCP_KERNEL_TRAP: ++ if (do_kernel_trap(env)) ++ goto error; ++ break; + default: + error: + fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n", +@@ -1602,6 +1668,10 @@ + ts->heap_base = info->brk; + /* This will be filled in on the first SYS_HEAPINFO call. */ + ts->heap_limit = 0; ++ /* Register the magic kernel code page. The cpu will generate a ++ special exception when it tries to execute code here. We can't ++ put real code here because it may be in use by the host kernel. */ ++ page_set_flags(0xffff0000, 0xffff0fff, 0); + } + #elif defined(TARGET_SPARC) + { +diff -ur qemu-0.8.0.orig/linux-user/qemu.h qemu-0.8.0/linux-user/qemu.h +--- qemu-0.8.0.orig/linux-user/qemu.h 2005-12-20 00:51:53.000000000 +0200 ++++ qemu-0.8.0/linux-user/qemu.h 2006-07-12 15:23:46.000000000 +0300 +@@ -76,6 +76,9 @@ + uint32_t v86mask; + #endif + int used; /* non zero if used */ ++#ifdef USE_NPTL ++ uint32_t *child_tidptr; ++#endif + uint8_t stack[0]; + } __attribute__((aligned(16))) TaskState; + +Only in qemu-0.8.0.orig/linux-user: signal.c.orig +diff -ur qemu-0.8.0.orig/linux-user/syscall.c qemu-0.8.0/linux-user/syscall.c +--- qemu-0.8.0.orig/linux-user/syscall.c 2006-07-12 15:20:37.000000000 +0300 ++++ qemu-0.8.0/linux-user/syscall.c 2006-07-12 15:36:51.000000000 +0300 +@@ -72,9 +72,18 @@ + #include <linux/kd.h> + + #include "qemu.h" ++#include "qemu_spinlock.h" + + //#define DEBUG + ++#ifdef USE_NPTL ++#define CLONE_NPTL_FLAGS2 (CLONE_SETTLS | \ ++ CLONE_PARENT_SETTID | CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID) ++#else ++/* XXX: Hardcode the above values. */ ++#define CLONE_NPTL_FLAGS2 0 ++#endif ++ + #if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SPARC) + /* 16 bit uid wrappers emulation */ + #define USE_UID16 +@@ -1527,20 +1536,38 @@ + thread/process */ + #define NEW_STACK_SIZE 8192 + ++#ifdef USE_NPTL ++static spinlock_t nptl_lock = SPIN_LOCK_UNLOCKED; ++#endif ++ + static int clone_func(void *arg) + { + CPUState *env = arg; ++#ifdef HAVE_NPTL ++ /* Wait until the parent has finshed initializing the tls state. */ ++ while (!spin_trylock(&nptl_lock)) ++ usleep(1); ++ spin_unlock(&nptl_lock); ++#endif + cpu_loop(env); + /* never exits */ + return 0; + } + +-int do_fork(CPUState *env, unsigned int flags, unsigned long newsp) ++int do_fork(CPUState *env, unsigned int flags, unsigned long newsp, ++ uint32_t *parent_tidptr, void *newtls, ++ uint32_t *child_tidptr) + { + int ret; + TaskState *ts; + uint8_t *new_stack; + CPUState *new_env; ++#ifdef USE_NPTL ++ unsigned int nptl_flags; ++ ++ if (flags & CLONE_PARENT_SETTID) ++ *parent_tidptr = gettid(); ++#endif + + if (flags & CLONE_VM) { + ts = malloc(sizeof(TaskState) + NEW_STACK_SIZE); +@@ -1576,16 +1603,62 @@ + #error unsupported target CPU + #endif + new_env->opaque = ts; ++#ifdef USE_NPTL ++ nptl_flags = flags; ++ flags &= ~CLONE_NPTL_FLAGS2; ++ ++ if (nptl_flags & CLONE_CHILD_CLEARTID) { ++ ts->child_tidptr = child_tidptr; ++ } ++ ++ if (nptl_flags & CLONE_SETTLS) ++ cpu_set_tls (new_env, newtls); ++ /* Grab the global cpu lock so that the thread setup appears ++ atomic. */ ++ if (nptl_flags & CLONE_CHILD_SETTID) ++ spin_lock(&nptl_lock); ++#else ++ if (flags & CLONE_NPTL_FLAGS2) ++ return -EINVAL; ++#endif ++ + #ifdef __ia64__ + ret = clone2(clone_func, new_stack + NEW_STACK_SIZE, flags, new_env); + #else + ret = clone(clone_func, new_stack + NEW_STACK_SIZE, flags, new_env); + #endif ++#ifdef USE_NPTL ++ if (ret != -1) { ++ if (nptl_flags & CLONE_CHILD_SETTID) ++ *child_tidptr = ret; ++ } ++ /* Allow the child to continue. */ ++ if (nptl_flags & CLONE_CHILD_SETTID) ++ spin_unlock(&nptl_lock); ++#endif + } else { + /* if no CLONE_VM, we consider it is a fork */ +- if ((flags & ~CSIGNAL) != 0) ++ if ((flags & ~(CSIGNAL | CLONE_NPTL_FLAGS2)) != 0) + return -EINVAL; + ret = fork(); ++#ifdef USE_NPTL ++ /* There is a race condition here. The parent process could ++ theoretically read the TID in the child process before the child ++ tid is set. This would require using either ptrace ++ (not implemented) or having *_tidptr to point at a shared memory ++ mapping. We can't repeat the spinlock hack used above because ++ the child process gets its own copy of the lock. */ ++ if (ret == 0) { ++ /* Child Process. */ ++ if (flags & CLONE_CHILD_SETTID) ++ *child_tidptr = gettid(); ++ ts = (TaskState *)env->opaque; ++ if (flags & CLONE_CHILD_CLEARTID) ++ ts->child_tidptr = child_tidptr; ++ if (flags & CLONE_SETTLS) ++ cpu_set_tls (env, newtls); ++ } ++#endif + } + return ret; + } +@@ -1757,7 +1830,7 @@ + ret = do_brk((char *)arg1); + break; + case TARGET_NR_fork: +- ret = get_errno(do_fork(cpu_env, SIGCHLD, 0)); ++ ret = get_errno(do_fork(cpu_env, SIGCHLD, 0, NULL, NULL, NULL)); + break; + case TARGET_NR_waitpid: + { +@@ -2564,7 +2637,8 @@ + ret = get_errno(fsync(arg1)); + break; + case TARGET_NR_clone: +- ret = get_errno(do_fork(cpu_env, arg1, arg2)); ++ ret = get_errno(do_fork(cpu_env, arg1, arg2, (uint32_t *)arg3, ++ (void *)arg4, (uint32_t *)arg5)); + break; + #ifdef __NR_exit_group + /* new thread calls */ +@@ -2925,7 +2999,8 @@ + #endif + #ifdef TARGET_NR_vfork + case TARGET_NR_vfork: +- ret = get_errno(do_fork(cpu_env, CLONE_VFORK | CLONE_VM | SIGCHLD, 0)); ++ ret = get_errno(do_fork(cpu_env, CLONE_VFORK | CLONE_VM | SIGCHLD, 0, ++ NULL, NULL, NULL)); + break; + #endif + #ifdef TARGET_NR_ugetrlimit +@@ -3347,4 +3422,3 @@ + #endif + return ret; + } +- +Only in qemu-0.8.0.orig/linux-user: syscall.c.orig +Only in qemu-0.8.0/linux-user: syscall.c.rej~ +Only in qemu-0.8.0/linux-user: syscall.c~ +Only in qemu-0.8.0: qemu_spinlock.h +diff -ur qemu-0.8.0.orig/target-arm/cpu.h qemu-0.8.0/target-arm/cpu.h +--- qemu-0.8.0.orig/target-arm/cpu.h 2005-12-20 00:51:53.000000000 +0200 ++++ qemu-0.8.0/target-arm/cpu.h 2006-07-12 15:27:28.000000000 +0300 +@@ -34,6 +34,9 @@ + #define EXCP_DATA_ABORT 4 + #define EXCP_IRQ 5 + #define EXCP_FIQ 6 ++#define EXCP_BKPT 7 ++#define EXCP_KERNEL_TRAP 8 /* Jumped to kernel code page. */ ++ + + /* We currently assume float and double are IEEE single and double + precision respectively. +@@ -83,6 +86,7 @@ + uint32_t c9_data; + uint32_t c13_fcse; /* FCSE PID. */ + uint32_t c13_context; /* Context ID. */ ++ uint32_t c13_tls; /* Paul Brook told me to just add this ;) */ + } cp15; + + /* exception/interrupt handling */ +@@ -126,6 +130,15 @@ + int cpu_arm_signal_handler(int host_signum, struct siginfo *info, + void *puc); + ++void cpu_lock(void); ++void cpu_unlock(void); ++#if defined(USE_NPTL) ++static inline void cpu_set_tls(CPUARMState *env, void *newtls) ++{ ++ env->cp15.c13_tls = (uint32_t)newtls; ++} ++#endif ++ + #define CPSR_M (0x1f) + #define CPSR_T (1 << 5) + #define CPSR_F (1 << 6) +@@ -137,7 +150,11 @@ + #define CPSR_J (1 << 24) + #define CPSR_IT_0_1 (3 << 25) + #define CPSR_Q (1 << 27) +-#define CPSR_NZCV (0xf << 28) ++#define CPSR_V (1 << 28) ++#define CPSR_C (1 << 29) ++#define CPSR_Z (1 << 30) ++#define CPSR_N (1 << 31) ++#define CPSR_NZCV (CPSR_N | CPSR_Z | CPSR_C | CPSR_V) + + #define CACHED_CPSR_BITS (CPSR_T | CPSR_Q | CPSR_NZCV) + /* Return the current CPSR value. */ +Only in qemu-0.8.0/target-arm: cpu.h~ +diff -ur qemu-0.8.0.orig/target-arm/exec.h qemu-0.8.0/target-arm/exec.h +--- qemu-0.8.0.orig/target-arm/exec.h 2005-12-20 00:51:53.000000000 +0200 ++++ qemu-0.8.0/target-arm/exec.h 2006-07-12 15:23:46.000000000 +0300 +@@ -51,8 +51,6 @@ + + /* In op_helper.c */ + +-void cpu_lock(void); +-void cpu_unlock(void); + void helper_set_cp15(CPUState *, uint32_t, uint32_t); + uint32_t helper_get_cp15(CPUState *, uint32_t); + +diff -ur qemu-0.8.0.orig/target-arm/op.c qemu-0.8.0/target-arm/op.c +--- qemu-0.8.0.orig/target-arm/op.c 2005-12-20 00:51:53.000000000 +0200 ++++ qemu-0.8.0/target-arm/op.c 2006-07-12 15:23:46.000000000 +0300 +@@ -885,6 +885,12 @@ + cpu_loop_exit(); + } + ++void OPPROTO op_kernel_trap(void) ++{ ++ env->exception_index = EXCP_KERNEL_TRAP; ++ cpu_loop_exit(); ++} ++ + /* VFP support. We follow the convention used for VFP instrunctions: + Single precition routines have a "s" suffix, double precision a + "d" suffix. */ +diff -ur qemu-0.8.0.orig/target-arm/translate.c qemu-0.8.0/target-arm/translate.c +--- qemu-0.8.0.orig/target-arm/translate.c 2005-12-20 00:51:53.000000000 +0200 ++++ qemu-0.8.0/target-arm/translate.c 2006-07-12 15:23:46.000000000 +0300 +@@ -2282,6 +2282,7 @@ + s->is_jmp = DISAS_JUMP; + } + ++ + /* generate intermediate code in gen_opc_buf and gen_opparam_buf for + basic block 'tb'. If search_pc is TRUE, also generate PC + information for each intermediate instruction. */ +@@ -2316,6 +2317,15 @@ + nb_gen_labels = 0; + lj = -1; + do { ++#ifdef CONFIG_USER_ONLY ++ /* Intercept jump to the magic kernel page. */ ++ if (dc->pc > 0xffff0000) { ++ gen_op_kernel_trap(); ++ dc->is_jmp = DISAS_UPDATE; ++ break; ++ } ++#endif ++ + if (env->nb_breakpoints > 0) { + for(j = 0; j < env->nb_breakpoints; j++) { + if (env->breakpoints[j] == dc->pc) { +diff -urN qemu-0.8.1.orig/qemu_spinlock.h qemu-0.8.1/qemu_spinlock.h +--- qemu-0.8.1.orig/qemu_spinlock.h 1970-01-01 02:00:00.000000000 +0200 ++++ qemu-0.8.1/qemu_spinlock.h 2006-06-04 00:59:23.000000000 +0300 +@@ -0,0 +1,182 @@ ++/* ++ * internal execution defines for qemu ++ * ++ * Copyright (c) 2003 Fabrice Bellard ++ * ++ * This library is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU Lesser General Public ++ * License as published by the Free Software Foundation; either ++ * version 2 of the License, or (at your option) any later version. ++ * ++ * This library is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ * Lesser General Public License for more details. ++ * ++ * You should have received a copy of the GNU Lesser General Public ++ * License along with this library; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ */ ++ ++#ifndef _QEMU_SPINLOCK_H ++#define _QEMU_SPINLOCK_H ++ ++#ifdef __powerpc__ ++static inline int testandset (int *p) ++{ ++ int ret; ++ __asm__ __volatile__ ( ++ "0: lwarx %0,0,%1\n" ++ " xor. %0,%3,%0\n" ++ " bne 1f\n" ++ " stwcx. %2,0,%1\n" ++ " bne- 0b\n" ++ "1: " ++ : "=&r" (ret) ++ : "r" (p), "r" (1), "r" (0) ++ : "cr0", "memory"); ++ return ret; ++} ++#endif ++ ++#ifdef __i386__ ++static inline int testandset (int *p) ++{ ++ long int readval = 0; ++ ++ __asm__ __volatile__ ("lock; cmpxchgl %2, %0" ++ : "+m" (*p), "+a" (readval) ++ : "r" (1) ++ : "cc"); ++ return readval; ++} ++#endif ++ ++#ifdef __x86_64__ ++static inline int testandset (int *p) ++{ ++ long int readval = 0; ++ ++ __asm__ __volatile__ ("lock; cmpxchgl %2, %0" ++ : "+m" (*p), "+a" (readval) ++ : "r" (1) ++ : "cc"); ++ return readval; ++} ++#endif ++ ++#ifdef __s390__ ++static inline int testandset (int *p) ++{ ++ int ret; ++ ++ __asm__ __volatile__ ("0: cs %0,%1,0(%2)\n" ++ " jl 0b" ++ : "=&d" (ret) ++ : "r" (1), "a" (p), "0" (*p) ++ : "cc", "memory" ); ++ return ret; ++} ++#endif ++ ++#ifdef __alpha__ ++static inline int testandset (int *p) ++{ ++ int ret; ++ unsigned long one; ++ ++ __asm__ __volatile__ ("0: mov 1,%2\n" ++ " ldl_l %0,%1\n" ++ " stl_c %2,%1\n" ++ " beq %2,1f\n" ++ ".subsection 2\n" ++ "1: br 0b\n" ++ ".previous" ++ : "=r" (ret), "=m" (*p), "=r" (one) ++ : "m" (*p)); ++ return ret; ++} ++#endif ++ ++#ifdef __sparc__ ++static inline int testandset (int *p) ++{ ++ int ret; ++ ++ __asm__ __volatile__("ldstub [%1], %0" ++ : "=r" (ret) ++ : "r" (p) ++ : "memory"); ++ ++ return (ret ? 1 : 0); ++} ++#endif ++ ++#ifdef __arm__ ++static inline int testandset (int *spinlock) ++{ ++ register unsigned int ret; ++ __asm__ __volatile__("swp %0, %1, [%2]" ++ : "=r"(ret) ++ : "0"(1), "r"(spinlock)); ++ ++ return ret; ++} ++#endif ++ ++#ifdef __mc68000 ++static inline int testandset (int *p) ++{ ++ char ret; ++ __asm__ __volatile__("tas %1; sne %0" ++ : "=r" (ret) ++ : "m" (p) ++ : "cc","memory"); ++ return ret; ++} ++#endif ++ ++#ifdef __ia64 ++#include <ia64intrin.h> ++ ++static inline int testandset (int *p) ++{ ++ return __sync_lock_test_and_set (p, 1); ++} ++#endif ++ ++typedef int spinlock_t; ++ ++#define SPIN_LOCK_UNLOCKED 0 ++ ++#if defined(CONFIG_USER_ONLY) ++static inline void spin_lock(spinlock_t *lock) ++{ ++ while (testandset(lock)); ++} ++ ++static inline void spin_unlock(spinlock_t *lock) ++{ ++ *lock = 0; ++} ++ ++static inline int spin_trylock(spinlock_t *lock) ++{ ++ return !testandset(lock); ++} ++#else ++static inline void spin_lock(spinlock_t *lock) ++{ ++} ++ ++static inline void spin_unlock(spinlock_t *lock) ++{ ++} ++ ++static inline int spin_trylock(spinlock_t *lock) ++{ ++ return 1; ++} ++#endif ++ ++#endif /* ! _QEMU_SPINLOCK_H */ + |