Move target-* CPU file into a target/ folder

We've currently got 18 architectures in QEMU, and thus 18 target-xxx
folders in the root folder of the QEMU source tree. More architectures
(e.g. RISC-V, AVR) are likely to be included soon, too, so the main
folder of the QEMU sources slowly gets quite overcrowded with the
target-xxx folders.
To disburden the main folder a little bit, let's move the target-xxx
folders into a dedicated target/ folder, so that target-xxx/ simply
becomes target/xxx/ instead.

Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part]
Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part]
Acked-by: Michael Walle <michael@walle.cc> [lm32 part]
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part]
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part]
Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part]
Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part]
Acked-by: Richard Henderson <rth@twiddle.net> [alpha part]
Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part]
Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part]
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [cris&microblaze part]
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part]
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 462 insertions, 0 deletions

diff --git a/target/m68k/m68k-semi.c b/target/m68k/m68k-semi.c
new file mode 100644
index 0000000000..1402145c8f
--- /dev/null
+++ b/target/m68k/m68k-semi.c
@@ -0,0 +1,462 @@
+/*
+ *  m68k/ColdFire Semihosting syscall interface
+ *
+ *  Copyright (c) 2005-2007 CodeSourcery.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+
+#include "cpu.h"
+#if defined(CONFIG_USER_ONLY)
+#include "qemu.h"
+#define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024)
+#else
+#include "qemu-common.h"
+#include "exec/gdbstub.h"
+#include "exec/softmmu-semi.h"
+#endif
+#include "qemu/log.h"
+#include "sysemu/sysemu.h"
+
+#define HOSTED_EXIT  0
+#define HOSTED_INIT_SIM 1
+#define HOSTED_OPEN 2
+#define HOSTED_CLOSE 3
+#define HOSTED_READ 4
+#define HOSTED_WRITE 5
+#define HOSTED_LSEEK 6
+#define HOSTED_RENAME 7
+#define HOSTED_UNLINK 8
+#define HOSTED_STAT 9
+#define HOSTED_FSTAT 10
+#define HOSTED_GETTIMEOFDAY 11
+#define HOSTED_ISATTY 12
+#define HOSTED_SYSTEM 13
+
+typedef uint32_t gdb_mode_t;
+typedef uint32_t gdb_time_t;
+
+struct m68k_gdb_stat {
+  uint32_t    gdb_st_dev;     /* device */
+  uint32_t    gdb_st_ino;     /* inode */
+  gdb_mode_t  gdb_st_mode;    /* protection */
+  uint32_t    gdb_st_nlink;   /* number of hard links */
+  uint32_t    gdb_st_uid;     /* user ID of owner */
+  uint32_t    gdb_st_gid;     /* group ID of owner */
+  uint32_t    gdb_st_rdev;    /* device type (if inode device) */
+  uint64_t    gdb_st_size;    /* total size, in bytes */
+  uint64_t    gdb_st_blksize; /* blocksize for filesystem I/O */
+  uint64_t    gdb_st_blocks;  /* number of blocks allocated */
+  gdb_time_t  gdb_st_atime;   /* time of last access */
+  gdb_time_t  gdb_st_mtime;   /* time of last modification */
+  gdb_time_t  gdb_st_ctime;   /* time of last change */
+} QEMU_PACKED;
+
+struct gdb_timeval {
+  gdb_time_t tv_sec;  /* second */
+  uint64_t tv_usec;   /* microsecond */
+} QEMU_PACKED;
+
+#define GDB_O_RDONLY   0x0
+#define GDB_O_WRONLY   0x1
+#define GDB_O_RDWR     0x2
+#define GDB_O_APPEND   0x8
+#define GDB_O_CREAT  0x200
+#define GDB_O_TRUNC  0x400
+#define GDB_O_EXCL   0x800
+
+static int translate_openflags(int flags)
+{
+    int hf;
+
+    if (flags & GDB_O_WRONLY)
+        hf = O_WRONLY;
+    else if (flags & GDB_O_RDWR)
+        hf = O_RDWR;
+    else
+        hf = O_RDONLY;
+
+    if (flags & GDB_O_APPEND) hf |= O_APPEND;
+    if (flags & GDB_O_CREAT) hf |= O_CREAT;
+    if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
+    if (flags & GDB_O_EXCL) hf |= O_EXCL;
+
+    return hf;
+}
+
+static void translate_stat(CPUM68KState *env, target_ulong addr, struct stat *s)
+{
+    struct m68k_gdb_stat *p;
+
+    if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0)))
+        /* FIXME - should this return an error code? */
+        return;
+    p->gdb_st_dev = cpu_to_be32(s->st_dev);
+    p->gdb_st_ino = cpu_to_be32(s->st_ino);
+    p->gdb_st_mode = cpu_to_be32(s->st_mode);
+    p->gdb_st_nlink = cpu_to_be32(s->st_nlink);
+    p->gdb_st_uid = cpu_to_be32(s->st_uid);
+    p->gdb_st_gid = cpu_to_be32(s->st_gid);
+    p->gdb_st_rdev = cpu_to_be32(s->st_rdev);
+    p->gdb_st_size = cpu_to_be64(s->st_size);
+#ifdef _WIN32
+    /* Windows stat is missing some fields.  */
+    p->gdb_st_blksize = 0;
+    p->gdb_st_blocks = 0;
+#else
+    p->gdb_st_blksize = cpu_to_be64(s->st_blksize);
+    p->gdb_st_blocks = cpu_to_be64(s->st_blocks);
+#endif
+    p->gdb_st_atime = cpu_to_be32(s->st_atime);
+    p->gdb_st_mtime = cpu_to_be32(s->st_mtime);
+    p->gdb_st_ctime = cpu_to_be32(s->st_ctime);
+    unlock_user(p, addr, sizeof(struct m68k_gdb_stat));
+}
+
+static void m68k_semi_return_u32(CPUM68KState *env, uint32_t ret, uint32_t err)
+{
+    target_ulong args = env->dregs[1];
+    if (put_user_u32(ret, args) ||
+        put_user_u32(err, args + 4)) {
+        /* The m68k semihosting ABI does not provide any way to report this
+         * error to the guest, so the best we can do is log it in qemu.
+         * It is always a guest error not to pass us a valid argument block.
+         */
+        qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value "
+                      "discarded because argument block not writable\n");
+    }
+}
+
+static void m68k_semi_return_u64(CPUM68KState *env, uint64_t ret, uint32_t err)
+{
+    target_ulong args = env->dregs[1];
+    if (put_user_u32(ret >> 32, args) ||
+        put_user_u32(ret, args + 4) ||
+        put_user_u32(err, args + 8)) {
+        /* No way to report this via m68k semihosting ABI; just log it */
+        qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value "
+                      "discarded because argument block not writable\n");
+    }
+}
+
+static int m68k_semi_is_fseek;
+
+static void m68k_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
+{
+    M68kCPU *cpu = M68K_CPU(cs);
+    CPUM68KState *env = &cpu->env;
+
+    if (m68k_semi_is_fseek) {
+        /* FIXME: We've already lost the high bits of the fseek
+           return value.  */
+        m68k_semi_return_u64(env, ret, err);
+        m68k_semi_is_fseek = 0;
+    } else {
+        m68k_semi_return_u32(env, ret, err);
+    }
+}
+
+/* Read the input value from the argument block; fail the semihosting
+ * call if the memory read fails.
+ */
+#define GET_ARG(n) do {                                 \
+    if (get_user_ual(arg ## n, args + (n) * 4)) {       \
+        result = -1;                                    \
+        errno = EFAULT;                                 \
+        goto failed;                                    \
+    }                                                   \
+} while (0)
+
+void do_m68k_semihosting(CPUM68KState *env, int nr)
+{
+    uint32_t args;
+    target_ulong arg0, arg1, arg2, arg3;
+    void *p;
+    void *q;
+    uint32_t len;
+    uint32_t result;
+
+    args = env->dregs[1];
+    switch (nr) {
+    case HOSTED_EXIT:
+        gdb_exit(env, env->dregs[0]);
+        exit(env->dregs[0]);
+    case HOSTED_OPEN:
+        GET_ARG(0);
+        GET_ARG(1);
+        GET_ARG(2);
+        GET_ARG(3);
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", arg0, (int)arg1,
+                           arg2, arg3);
+            return;
+        } else {
+            p = lock_user_string(arg0);
+            if (!p) {
+                /* FIXME - check error code? */
+                result = -1;
+            } else {
+                result = open(p, translate_openflags(arg2), arg3);
+                unlock_user(p, arg0, 0);
+            }
+        }
+        break;
+    case HOSTED_CLOSE:
+        {
+            /* Ignore attempts to close stdin/out/err.  */
+            GET_ARG(0);
+            int fd = arg0;
+            if (fd > 2) {
+                if (use_gdb_syscalls()) {
+                    gdb_do_syscall(m68k_semi_cb, "close,%x", arg0);
+                    return;
+                } else {
+                    result = close(fd);
+                }
+            } else {
+                result = 0;
+            }
+            break;
+        }
+    case HOSTED_READ:
+        GET_ARG(0);
+        GET_ARG(1);
+        GET_ARG(2);
+        len = arg2;
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
+                           arg0, arg1, len);
+            return;
+        } else {
+            p = lock_user(VERIFY_WRITE, arg1, len, 0);
+            if (!p) {
+                /* FIXME - check error code? */
+                result = -1;
+            } else {
+                result = read(arg0, p, len);
+                unlock_user(p, arg1, len);
+            }
+        }
+        break;
+    case HOSTED_WRITE:
+        GET_ARG(0);
+        GET_ARG(1);
+        GET_ARG(2);
+        len = arg2;
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
+                           arg0, arg1, len);
+            return;
+        } else {
+            p = lock_user(VERIFY_READ, arg1, len, 1);
+            if (!p) {
+                /* FIXME - check error code? */
+                result = -1;
+            } else {
+                result = write(arg0, p, len);
+                unlock_user(p, arg0, 0);
+            }
+        }
+        break;
+    case HOSTED_LSEEK:
+        {
+            uint64_t off;
+            GET_ARG(0);
+            GET_ARG(1);
+            GET_ARG(2);
+            GET_ARG(3);
+            off = (uint32_t)arg2 | ((uint64_t)arg1 << 32);
+            if (use_gdb_syscalls()) {
+                m68k_semi_is_fseek = 1;
+                gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
+                               arg0, off, arg3);
+            } else {
+                off = lseek(arg0, off, arg3);
+                m68k_semi_return_u64(env, off, errno);
+            }
+            return;
+        }
+    case HOSTED_RENAME:
+        GET_ARG(0);
+        GET_ARG(1);
+        GET_ARG(2);
+        GET_ARG(3);
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
+                           arg0, (int)arg1, arg2, (int)arg3);
+            return;
+        } else {
+            p = lock_user_string(arg0);
+            q = lock_user_string(arg2);
+            if (!p || !q) {
+                /* FIXME - check error code? */
+                result = -1;
+            } else {
+                result = rename(p, q);
+            }
+            unlock_user(p, arg0, 0);
+            unlock_user(q, arg2, 0);
+        }
+        break;
+    case HOSTED_UNLINK:
+        GET_ARG(0);
+        GET_ARG(1);
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "unlink,%s",
+                           arg0, (int)arg1);
+            return;
+        } else {
+            p = lock_user_string(arg0);
+            if (!p) {
+                /* FIXME - check error code? */
+                result = -1;
+            } else {
+                result = unlink(p);
+                unlock_user(p, arg0, 0);
+            }
+        }
+        break;
+    case HOSTED_STAT:
+        GET_ARG(0);
+        GET_ARG(1);
+        GET_ARG(2);
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
+                           arg0, (int)arg1, arg2);
+            return;
+        } else {
+            struct stat s;
+            p = lock_user_string(arg0);
+            if (!p) {
+                /* FIXME - check error code? */
+                result = -1;
+            } else {
+                result = stat(p, &s);
+                unlock_user(p, arg0, 0);
+            }
+            if (result == 0) {
+                translate_stat(env, arg2, &s);
+            }
+        }
+        break;
+    case HOSTED_FSTAT:
+        GET_ARG(0);
+        GET_ARG(1);
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
+                           arg0, arg1);
+            return;
+        } else {
+            struct stat s;
+            result = fstat(arg0, &s);
+            if (result == 0) {
+                translate_stat(env, arg1, &s);
+            }
+        }
+        break;
+    case HOSTED_GETTIMEOFDAY:
+        GET_ARG(0);
+        GET_ARG(1);
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
+                           arg0, arg1);
+            return;
+        } else {
+            qemu_timeval tv;
+            struct gdb_timeval *p;
+            result = qemu_gettimeofday(&tv);
+            if (result != 0) {
+                if (!(p = lock_user(VERIFY_WRITE,
+                                    arg0, sizeof(struct gdb_timeval), 0))) {
+                    /* FIXME - check error code? */
+                    result = -1;
+                } else {
+                    p->tv_sec = cpu_to_be32(tv.tv_sec);
+                    p->tv_usec = cpu_to_be64(tv.tv_usec);
+                    unlock_user(p, arg0, sizeof(struct gdb_timeval));
+                }
+            }
+        }
+        break;
+    case HOSTED_ISATTY:
+        GET_ARG(0);
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "isatty,%x", arg0);
+            return;
+        } else {
+            result = isatty(arg0);
+        }
+        break;
+    case HOSTED_SYSTEM:
+        GET_ARG(0);
+        GET_ARG(1);
+        if (use_gdb_syscalls()) {
+            gdb_do_syscall(m68k_semi_cb, "system,%s",
+                           arg0, (int)arg1);
+            return;
+        } else {
+            p = lock_user_string(arg0);
+            if (!p) {
+                /* FIXME - check error code? */
+                result = -1;
+            } else {
+                result = system(p);
+                unlock_user(p, arg0, 0);
+            }
+        }
+        break;
+    case HOSTED_INIT_SIM:
+#if defined(CONFIG_USER_ONLY)
+        {
+        CPUState *cs = CPU(m68k_env_get_cpu(env));
+        TaskState *ts = cs->opaque;
+        /* Allocate the heap using sbrk.  */
+        if (!ts->heap_limit) {
+            abi_ulong ret;
+            uint32_t size;
+            uint32_t base;
+
+            base = do_brk(0);
+            size = SEMIHOSTING_HEAP_SIZE;
+            /* Try a big heap, and reduce the size if that fails.  */
+            for (;;) {
+                ret = do_brk(base + size);
+                if (ret >= (base + size)) {
+                    break;
+                }
+                size >>= 1;
+            }
+            ts->heap_limit = base + size;
+        }
+        /* This call may happen before we have writable memory, so return
+           values directly in registers.  */
+        env->dregs[1] = ts->heap_limit;
+        env->aregs[7] = ts->stack_base;
+        }
+#else
+        /* FIXME: This is wrong for boards where RAM does not start at
+           address zero.  */
+        env->dregs[1] = ram_size;
+        env->aregs[7] = ram_size;
+#endif
+        return;
+    default:
+        cpu_abort(CPU(m68k_env_get_cpu(env)), "Unsupported semihosting syscall %d\n", nr);
+        result = 0;
+    }
+failed:
+    m68k_semi_return_u32(env, result, errno);
+}