--- /dev/null
+/*
+ * Microblaze helper routines.
+ *
+ * Copyright (c) 2009 Edgar E. Iglesias <edgar.iglesias@gmail.com>.
+ * Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include "cpu.h"
+#include "exec/helper-proto.h"
+#include "qemu/host-utils.h"
+#include "exec/cpu_ldst.h"
+
+#define D(x)
+
+#if !defined(CONFIG_USER_ONLY)
+
+/* Try to fill the TLB and return an exception if error. If retaddr is
+ * NULL, it means that the function was called in C code (i.e. not
+ * from generated code or from helper.c)
+ */
+void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
+ uintptr_t retaddr)
+{
+ int ret;
+
+ ret = mb_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx);
+ if (unlikely(ret)) {
+ if (retaddr) {
+ /* now we have a real cpu fault */
+ cpu_restore_state(cs, retaddr);
+ }
+ cpu_loop_exit(cs);
+ }
+}
+#endif
+
+void helper_put(uint32_t id, uint32_t ctrl, uint32_t data)
+{
+ int test = ctrl & STREAM_TEST;
+ int atomic = ctrl & STREAM_ATOMIC;
+ int control = ctrl & STREAM_CONTROL;
+ int nonblock = ctrl & STREAM_NONBLOCK;
+ int exception = ctrl & STREAM_EXCEPTION;
+
+ qemu_log("Unhandled stream put to stream-id=%d data=%x %s%s%s%s%s\n",
+ id, data,
+ test ? "t" : "",
+ nonblock ? "n" : "",
+ exception ? "e" : "",
+ control ? "c" : "",
+ atomic ? "a" : "");
+}
+
+uint32_t helper_get(uint32_t id, uint32_t ctrl)
+{
+ int test = ctrl & STREAM_TEST;
+ int atomic = ctrl & STREAM_ATOMIC;
+ int control = ctrl & STREAM_CONTROL;
+ int nonblock = ctrl & STREAM_NONBLOCK;
+ int exception = ctrl & STREAM_EXCEPTION;
+
+ qemu_log("Unhandled stream get from stream-id=%d %s%s%s%s%s\n",
+ id,
+ test ? "t" : "",
+ nonblock ? "n" : "",
+ exception ? "e" : "",
+ control ? "c" : "",
+ atomic ? "a" : "");
+ return 0xdead0000 | id;
+}
+
+void helper_raise_exception(CPUMBState *env, uint32_t index)
+{
+ CPUState *cs = CPU(mb_env_get_cpu(env));
+
+ cs->exception_index = index;
+ cpu_loop_exit(cs);
+}
+
+void helper_debug(CPUMBState *env)
+{
+ int i;
+
+ qemu_log("PC=%8.8x\n", env->sregs[SR_PC]);
+ qemu_log("rmsr=%x resr=%x rear=%x debug[%x] imm=%x iflags=%x\n",
+ env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR],
+ env->debug, env->imm, env->iflags);
+ qemu_log("btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
+ env->btaken, env->btarget,
+ (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel",
+ (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel",
+ (env->sregs[SR_MSR] & MSR_EIP),
+ (env->sregs[SR_MSR] & MSR_IE));
+ for (i = 0; i < 32; i++) {
+ qemu_log("r%2.2d=%8.8x ", i, env->regs[i]);
+ if ((i + 1) % 4 == 0)
+ qemu_log("\n");
+ }
+ qemu_log("\n\n");
+}
+
+static inline uint32_t compute_carry(uint32_t a, uint32_t b, uint32_t cin)
+{
+ uint32_t cout = 0;
+
+ if ((b == ~0) && cin)
+ cout = 1;
+ else if ((~0 - a) < (b + cin))
+ cout = 1;
+ return cout;
+}
+
+uint32_t helper_cmp(uint32_t a, uint32_t b)
+{
+ uint32_t t;
+
+ t = b + ~a + 1;
+ if ((b & 0x80000000) ^ (a & 0x80000000))
+ t = (t & 0x7fffffff) | (b & 0x80000000);
+ return t;
+}
+
+uint32_t helper_cmpu(uint32_t a, uint32_t b)
+{
+ uint32_t t;
+
+ t = b + ~a + 1;
+ if ((b & 0x80000000) ^ (a & 0x80000000))
+ t = (t & 0x7fffffff) | (a & 0x80000000);
+ return t;
+}
+
+uint32_t helper_clz(uint32_t t0)
+{
+ return clz32(t0);
+}
+
+uint32_t helper_carry(uint32_t a, uint32_t b, uint32_t cf)
+{
+ uint32_t ncf;
+ ncf = compute_carry(a, b, cf);
+ return ncf;
+}
+
+static inline int div_prepare(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ if (b == 0) {
+ env->sregs[SR_MSR] |= MSR_DZ;
+
+ if ((env->sregs[SR_MSR] & MSR_EE)
+ && !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
+ env->sregs[SR_ESR] = ESR_EC_DIVZERO;
+ helper_raise_exception(env, EXCP_HW_EXCP);
+ }
+ return 0;
+ }
+ env->sregs[SR_MSR] &= ~MSR_DZ;
+ return 1;
+}
+
+uint32_t helper_divs(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ if (!div_prepare(env, a, b)) {
+ return 0;
+ }
+ return (int32_t)a / (int32_t)b;
+}
+
+uint32_t helper_divu(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ if (!div_prepare(env, a, b)) {
+ return 0;
+ }
+ return a / b;
+}
+
+/* raise FPU exception. */
+static void raise_fpu_exception(CPUMBState *env)
+{
+ env->sregs[SR_ESR] = ESR_EC_FPU;
+ helper_raise_exception(env, EXCP_HW_EXCP);
+}
+
+static void update_fpu_flags(CPUMBState *env, int flags)
+{
+ int raise = 0;
+
+ if (flags & float_flag_invalid) {
+ env->sregs[SR_FSR] |= FSR_IO;
+ raise = 1;
+ }
+ if (flags & float_flag_divbyzero) {
+ env->sregs[SR_FSR] |= FSR_DZ;
+ raise = 1;
+ }
+ if (flags & float_flag_overflow) {
+ env->sregs[SR_FSR] |= FSR_OF;
+ raise = 1;
+ }
+ if (flags & float_flag_underflow) {
+ env->sregs[SR_FSR] |= FSR_UF;
+ raise = 1;
+ }
+ if (raise
+ && (env->pvr.regs[2] & PVR2_FPU_EXC_MASK)
+ && (env->sregs[SR_MSR] & MSR_EE)) {
+ raise_fpu_exception(env);
+ }
+}
+
+uint32_t helper_fadd(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fd, fa, fb;
+ int flags;
+
+ set_float_exception_flags(0, &env->fp_status);
+ fa.l = a;
+ fb.l = b;
+ fd.f = float32_add(fa.f, fb.f, &env->fp_status);
+
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags);
+ return fd.l;
+}
+
+uint32_t helper_frsub(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fd, fa, fb;
+ int flags;
+
+ set_float_exception_flags(0, &env->fp_status);
+ fa.l = a;
+ fb.l = b;
+ fd.f = float32_sub(fb.f, fa.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags);
+ return fd.l;
+}
+
+uint32_t helper_fmul(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fd, fa, fb;
+ int flags;
+
+ set_float_exception_flags(0, &env->fp_status);
+ fa.l = a;
+ fb.l = b;
+ fd.f = float32_mul(fa.f, fb.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags);
+
+ return fd.l;
+}
+
+uint32_t helper_fdiv(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fd, fa, fb;
+ int flags;
+
+ set_float_exception_flags(0, &env->fp_status);
+ fa.l = a;
+ fb.l = b;
+ fd.f = float32_div(fb.f, fa.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags);
+
+ return fd.l;
+}
+
+uint32_t helper_fcmp_un(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fa, fb;
+ uint32_t r = 0;
+
+ fa.l = a;
+ fb.l = b;
+
+ if (float32_is_signaling_nan(fa.f) || float32_is_signaling_nan(fb.f)) {
+ update_fpu_flags(env, float_flag_invalid);
+ r = 1;
+ }
+
+ if (float32_is_quiet_nan(fa.f) || float32_is_quiet_nan(fb.f)) {
+ r = 1;
+ }
+
+ return r;
+}
+
+uint32_t helper_fcmp_lt(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fa, fb;
+ int r;
+ int flags;
+
+ set_float_exception_flags(0, &env->fp_status);
+ fa.l = a;
+ fb.l = b;
+ r = float32_lt(fb.f, fa.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags & float_flag_invalid);
+
+ return r;
+}
+
+uint32_t helper_fcmp_eq(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fa, fb;
+ int flags;
+ int r;
+
+ set_float_exception_flags(0, &env->fp_status);
+ fa.l = a;
+ fb.l = b;
+ r = float32_eq_quiet(fa.f, fb.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags & float_flag_invalid);
+
+ return r;
+}
+
+uint32_t helper_fcmp_le(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fa, fb;
+ int flags;
+ int r;
+
+ fa.l = a;
+ fb.l = b;
+ set_float_exception_flags(0, &env->fp_status);
+ r = float32_le(fa.f, fb.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags & float_flag_invalid);
+
+
+ return r;
+}
+
+uint32_t helper_fcmp_gt(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fa, fb;
+ int flags, r;
+
+ fa.l = a;
+ fb.l = b;
+ set_float_exception_flags(0, &env->fp_status);
+ r = float32_lt(fa.f, fb.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags & float_flag_invalid);
+ return r;
+}
+
+uint32_t helper_fcmp_ne(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fa, fb;
+ int flags, r;
+
+ fa.l = a;
+ fb.l = b;
+ set_float_exception_flags(0, &env->fp_status);
+ r = !float32_eq_quiet(fa.f, fb.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags & float_flag_invalid);
+
+ return r;
+}
+
+uint32_t helper_fcmp_ge(CPUMBState *env, uint32_t a, uint32_t b)
+{
+ CPU_FloatU fa, fb;
+ int flags, r;
+
+ fa.l = a;
+ fb.l = b;
+ set_float_exception_flags(0, &env->fp_status);
+ r = !float32_lt(fa.f, fb.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags & float_flag_invalid);
+
+ return r;
+}
+
+uint32_t helper_flt(CPUMBState *env, uint32_t a)
+{
+ CPU_FloatU fd, fa;
+
+ fa.l = a;
+ fd.f = int32_to_float32(fa.l, &env->fp_status);
+ return fd.l;
+}
+
+uint32_t helper_fint(CPUMBState *env, uint32_t a)
+{
+ CPU_FloatU fa;
+ uint32_t r;
+ int flags;
+
+ set_float_exception_flags(0, &env->fp_status);
+ fa.l = a;
+ r = float32_to_int32(fa.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags);
+
+ return r;
+}
+
+uint32_t helper_fsqrt(CPUMBState *env, uint32_t a)
+{
+ CPU_FloatU fd, fa;
+ int flags;
+
+ set_float_exception_flags(0, &env->fp_status);
+ fa.l = a;
+ fd.l = float32_sqrt(fa.f, &env->fp_status);
+ flags = get_float_exception_flags(&env->fp_status);
+ update_fpu_flags(env, flags);
+
+ return fd.l;
+}
+
+uint32_t helper_pcmpbf(uint32_t a, uint32_t b)
+{
+ unsigned int i;
+ uint32_t mask = 0xff000000;
+
+ for (i = 0; i < 4; i++) {
+ if ((a & mask) == (b & mask))
+ return i + 1;
+ mask >>= 8;
+ }
+ return 0;
+}
+
+void helper_memalign(CPUMBState *env, uint32_t addr, uint32_t dr, uint32_t wr,
+ uint32_t mask)
+{
+ if (addr & mask) {
+ qemu_log_mask(CPU_LOG_INT,
+ "unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
+ addr, mask, wr, dr);
+ env->sregs[SR_EAR] = addr;
+ env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \
+ | (dr & 31) << 5;
+ if (mask == 3) {
+ env->sregs[SR_ESR] |= 1 << 11;
+ }
+ if (!(env->sregs[SR_MSR] & MSR_EE)) {
+ return;
+ }
+ helper_raise_exception(env, EXCP_HW_EXCP);
+ }
+}
+
+void helper_stackprot(CPUMBState *env, uint32_t addr)
+{
+ if (addr < env->slr || addr > env->shr) {
+ qemu_log("Stack protector violation at %x %x %x\n",
+ addr, env->slr, env->shr);
+ env->sregs[SR_EAR] = addr;
+ env->sregs[SR_ESR] = ESR_EC_STACKPROT;
+ helper_raise_exception(env, EXCP_HW_EXCP);
+ }
+}
+
+#if !defined(CONFIG_USER_ONLY)
+/* Writes/reads to the MMU's special regs end up here. */
+uint32_t helper_mmu_read(CPUMBState *env, uint32_t rn)
+{
+ return mmu_read(env, rn);
+}
+
+void helper_mmu_write(CPUMBState *env, uint32_t rn, uint32_t v)
+{
+ mmu_write(env, rn, v);
+}
+
+void mb_cpu_unassigned_access(CPUState *cs, hwaddr addr,
+ bool is_write, bool is_exec, int is_asi,
+ unsigned size)
+{
+ MicroBlazeCPU *cpu;
+ CPUMBState *env;
+
+ qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
+ addr, is_write ? 1 : 0, is_exec ? 1 : 0);
+ if (cs == NULL) {
+ return;
+ }
+ cpu = MICROBLAZE_CPU(cs);
+ env = &cpu->env;
+ if (!(env->sregs[SR_MSR] & MSR_EE)) {
+ return;
+ }
+
+ env->sregs[SR_EAR] = addr;
+ if (is_exec) {
+ if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
+ env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
+ helper_raise_exception(env, EXCP_HW_EXCP);
+ }
+ } else {
+ if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
+ env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
+ helper_raise_exception(env, EXCP_HW_EXCP);
+ }
+ }
+}
+#endif
Code Review / kvmfornfv.git / blobdiff