*
* 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
*/
-#include <assert.h>
#include "exec.h"
#include "mmu.h"
+#include "helper.h"
+#include "host-utils.h"
-#define MMUSUFFIX _mmu
-#ifdef __s390__
-# define GETPC() ((void*)((unsigned long)__builtin_return_address(0) & 0x7fffffffUL))
+//#define CRIS_OP_HELPER_DEBUG
+
+
+#ifdef CRIS_OP_HELPER_DEBUG
+#define D(x) x
+#define D_LOG(...) qemu_log(__VA__ARGS__)
#else
-# define GETPC() (__builtin_return_address(0))
+#define D(x)
+#define D_LOG(...) do { } while (0)
#endif
+#if !defined(CONFIG_USER_ONLY)
+
+#define MMUSUFFIX _mmu
+
#define SHIFT 0
#include "softmmu_template.h"
#define SHIFT 3
#include "softmmu_template.h"
-#define D(x)
-
/* 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) */
saved_env = env;
env = cpu_single_env;
- D(fprintf(logfile, "%s ra=%x acr=%x %x\n", __func__, retaddr,
- env->regs[R_ACR], saved_env->regs[R_ACR]));
+ D_LOG("%s pc=%x tpc=%x ra=%x\n", __func__,
+ env->pc, env->debug1, retaddr);
ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
- if (__builtin_expect(ret, 0)) {
+ if (unlikely(ret)) {
if (retaddr) {
/* now we have a real cpu fault */
pc = (unsigned long)retaddr;
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, NULL);
+
+ /* Evaluate flags after retranslation. */
+ helper_top_evaluate_flags();
}
}
cpu_loop_exit();
env = saved_env;
}
-void helper_tlb_update(uint32_t T0)
+#endif
+
+void helper_raise_exception(uint32_t index)
{
-#if !defined(CONFIG_USER_ONLY)
- uint32_t vaddr;
- uint32_t srs = env->pregs[PR_SRS];
+ env->exception_index = index;
+ cpu_loop_exit();
+}
- if (srs != 1 && srs != 2)
- return;
+void helper_tlb_flush_pid(uint32_t pid)
+{
+#if !defined(CONFIG_USER_ONLY)
+ pid &= 0xff;
+ if (pid != (env->pregs[PR_PID] & 0xff))
+ cris_mmu_flush_pid(env, env->pregs[PR_PID]);
+#endif
+}
- vaddr = cris_mmu_tlb_latest_update(env, T0);
- D(printf("flush old_vaddr=%x vaddr=%x T0=%x\n", vaddr,
- env->sregs[SFR_R_MM_CAUSE] & TARGET_PAGE_MASK, T0));
- tlb_flush_page(env, vaddr);
+void helper_spc_write(uint32_t new_spc)
+{
+#if !defined(CONFIG_USER_ONLY)
+ tlb_flush_page(env, env->pregs[PR_SPC]);
+ tlb_flush_page(env, new_spc);
#endif
}
-void helper_tlb_flush(void)
+void helper_dump(uint32_t a0, uint32_t a1, uint32_t a2)
{
- tlb_flush(env, 1);
+ qemu_log("%s: a0=%x a1=%x\n", __func__, a0, a1);
}
-void helper_dump(uint32_t a0, uint32_t a1)
+/* Used by the tlb decoder. */
+#define EXTRACT_FIELD(src, start, end) \
+ (((src) >> start) & ((1 << (end - start + 1)) - 1))
+
+void helper_movl_sreg_reg (uint32_t sreg, uint32_t reg)
{
- (fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1));
+ uint32_t srs;
+ srs = env->pregs[PR_SRS];
+ srs &= 3;
+ env->sregs[srs][sreg] = env->regs[reg];
+
+#if !defined(CONFIG_USER_ONLY)
+ if (srs == 1 || srs == 2) {
+ if (sreg == 6) {
+ /* Writes to tlb-hi write to mm_cause as a side
+ effect. */
+ env->sregs[SFR_RW_MM_TLB_HI] = env->regs[reg];
+ env->sregs[SFR_R_MM_CAUSE] = env->regs[reg];
+ }
+ else if (sreg == 5) {
+ uint32_t set;
+ uint32_t idx;
+ uint32_t lo, hi;
+ uint32_t vaddr;
+ int tlb_v;
+
+ idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
+ set >>= 4;
+ set &= 3;
+
+ idx &= 15;
+ /* We've just made a write to tlb_lo. */
+ lo = env->sregs[SFR_RW_MM_TLB_LO];
+ /* Writes are done via r_mm_cause. */
+ hi = env->sregs[SFR_R_MM_CAUSE];
+
+ vaddr = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].hi,
+ 13, 31);
+ vaddr <<= TARGET_PAGE_BITS;
+ tlb_v = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].lo,
+ 3, 3);
+ env->tlbsets[srs - 1][set][idx].lo = lo;
+ env->tlbsets[srs - 1][set][idx].hi = hi;
+
+ D_LOG("tlb flush vaddr=%x v=%d pc=%x\n",
+ vaddr, tlb_v, env->pc);
+ tlb_flush_page(env, vaddr);
+ }
+ }
+#endif
}
-void helper_dummy(void)
+void helper_movl_reg_sreg (uint32_t reg, uint32_t sreg)
{
+ uint32_t srs;
+ env->pregs[PR_SRS] &= 3;
+ srs = env->pregs[PR_SRS];
+
+#if !defined(CONFIG_USER_ONLY)
+ if (srs == 1 || srs == 2)
+ {
+ uint32_t set;
+ uint32_t idx;
+ uint32_t lo, hi;
+
+ idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
+ set >>= 4;
+ set &= 3;
+ idx &= 15;
+
+ /* Update the mirror regs. */
+ hi = env->tlbsets[srs - 1][set][idx].hi;
+ lo = env->tlbsets[srs - 1][set][idx].lo;
+ env->sregs[SFR_RW_MM_TLB_HI] = hi;
+ env->sregs[SFR_RW_MM_TLB_LO] = lo;
+ }
+#endif
+ env->regs[reg] = env->sregs[srs][sreg];
+}
+
+static void cris_ccs_rshift(CPUState *env)
+{
+ uint32_t ccs;
+
+ /* Apply the ccs shift. */
+ ccs = env->pregs[PR_CCS];
+ ccs = (ccs & 0xc0000000) | ((ccs & 0x0fffffff) >> 10);
+ if (ccs & U_FLAG)
+ {
+ /* Enter user mode. */
+ env->ksp = env->regs[R_SP];
+ env->regs[R_SP] = env->pregs[PR_USP];
+ }
+ env->pregs[PR_CCS] = ccs;
}
-/* Only used for debugging at the moment. */
void helper_rfe(void)
{
- D(fprintf(logfile, "rfe: erp=%x pid=%x ccs=%x btarget=%x\n",
+ int rflag = env->pregs[PR_CCS] & R_FLAG;
+
+ D_LOG("rfe: erp=%x pid=%x ccs=%x btarget=%x\n",
env->pregs[PR_ERP], env->pregs[PR_PID],
env->pregs[PR_CCS],
- env->btarget));
+ env->btarget);
+
+ cris_ccs_rshift(env);
+
+ /* RFE sets the P_FLAG only if the R_FLAG is not set. */
+ if (!rflag)
+ env->pregs[PR_CCS] |= P_FLAG;
}
-void helper_store(uint32_t a0)
+void helper_rfn(void)
{
- if (env->pregs[PR_CCS] & P_FLAG )
- {
- cpu_abort(env, "cond_store_failed! pc=%x a0=%x\n",
- env->pc, a0);
- }
+ int rflag = env->pregs[PR_CCS] & R_FLAG;
+
+ D_LOG("rfn: erp=%x pid=%x ccs=%x btarget=%x\n",
+ env->pregs[PR_ERP], env->pregs[PR_PID],
+ env->pregs[PR_CCS],
+ env->btarget);
+
+ cris_ccs_rshift(env);
+
+ /* Set the P_FLAG only if the R_FLAG is not set. */
+ if (!rflag)
+ env->pregs[PR_CCS] |= P_FLAG;
+
+ /* Always set the M flag. */
+ env->pregs[PR_CCS] |= M_FLAG;
}
-void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
- int is_asi)
+uint32_t helper_lz(uint32_t t0)
{
- D(printf("%s addr=%x w=%d ex=%d asi=%d\n",
- __func__, addr, is_write, is_exec, is_asi));
+ return clz32(t0);
}
-static void evaluate_flags_writeback(uint32_t flags)
+uint32_t helper_btst(uint32_t t0, uint32_t t1, uint32_t ccs)
{
- int x;
-
- /* Extended arithmetics, leave the z flag alone. */
- env->debug3 = env->pregs[PR_CCS];
+ /* FIXME: clean this up. */
+
+ /* des ref:
+ The N flag is set according to the selected bit in the dest reg.
+ The Z flag is set if the selected bit and all bits to the right are
+ zero.
+ The X flag is cleared.
+ Other flags are left untouched.
+ The destination reg is not affected.*/
+ unsigned int fz, sbit, bset, mask, masked_t0;
+
+ sbit = t1 & 31;
+ bset = !!(t0 & (1 << sbit));
+ mask = sbit == 31 ? -1 : (1 << (sbit + 1)) - 1;
+ masked_t0 = t0 & mask;
+ fz = !(masked_t0 | bset);
+
+ /* Clear the X, N and Z flags. */
+ ccs = ccs & ~(X_FLAG | N_FLAG | Z_FLAG);
+ /* Set the N and Z flags accordingly. */
+ ccs |= (bset << 3) | (fz << 2);
+ return ccs;
+}
- if (env->cc_x_live)
- x = env->cc_x;
- else
- x = env->pregs[PR_CCS] & X_FLAG;
+static inline uint32_t evaluate_flags_writeback(uint32_t flags, uint32_t ccs)
+{
+ unsigned int x, z, mask;
- if ((x || env->cc_op == CC_OP_ADDC)
- && flags & Z_FLAG)
- env->cc_mask &= ~Z_FLAG;
+ /* Extended arithmetics, leave the z flag alone. */
+ x = env->cc_x;
+ mask = env->cc_mask | X_FLAG;
+ if (x) {
+ z = flags & Z_FLAG;
+ mask = mask & ~z;
+ }
+ flags &= mask;
/* all insn clear the x-flag except setf or clrf. */
- env->pregs[PR_CCS] &= ~(env->cc_mask | X_FLAG);
- flags &= env->cc_mask;
- env->pregs[PR_CCS] |= flags;
- RETURN();
+ ccs &= ~mask;
+ ccs |= flags;
+ return ccs;
}
-void helper_evaluate_flags_muls(void)
+uint32_t helper_evaluate_flags_muls(uint32_t ccs, uint32_t res, uint32_t mof)
{
- uint32_t src;
- uint32_t dst;
- uint32_t res;
uint32_t flags = 0;
- /* were gonna have to redo the muls. */
- int64_t tmp, t0 ,t1;
- int32_t mof;
+ int64_t tmp;
int dneg;
- src = env->cc_src;
- dst = env->cc_dest;
- res = env->cc_result;
-
-
- /* cast into signed values to make GCC sign extend. */
- t0 = (int32_t)src;
- t1 = (int32_t)dst;
dneg = ((int32_t)res) < 0;
- tmp = t0 * t1;
- mof = tmp >> 32;
+ tmp = mof;
+ tmp <<= 32;
+ tmp |= res;
if (tmp == 0)
flags |= Z_FLAG;
else if (tmp < 0)
if ((dneg && mof != -1)
|| (!dneg && mof != 0))
flags |= V_FLAG;
- evaluate_flags_writeback(flags);
+ return evaluate_flags_writeback(flags, ccs);
}
-void helper_evaluate_flags_mulu(void)
+uint32_t helper_evaluate_flags_mulu(uint32_t ccs, uint32_t res, uint32_t mof)
{
- uint32_t src;
- uint32_t dst;
- uint32_t res;
uint32_t flags = 0;
- /* were gonna have to redo the muls. */
- uint64_t tmp, t0 ,t1;
- uint32_t mof;
+ uint64_t tmp;
- src = env->cc_src;
- dst = env->cc_dest;
- res = env->cc_result;
-
-
- /* cast into signed values to make GCC sign extend. */
- t0 = src;
- t1 = dst;
-
- tmp = t0 * t1;
- mof = tmp >> 32;
+ tmp = mof;
+ tmp <<= 32;
+ tmp |= res;
if (tmp == 0)
flags |= Z_FLAG;
else if (tmp >> 63)
if (mof)
flags |= V_FLAG;
- evaluate_flags_writeback(flags);
+ return evaluate_flags_writeback(flags, ccs);
}
-void helper_evaluate_flags_mcp(void)
+uint32_t helper_evaluate_flags_mcp(uint32_t ccs,
+ uint32_t src, uint32_t dst, uint32_t res)
{
- uint32_t src;
- uint32_t dst;
- uint32_t res;
uint32_t flags = 0;
- src = env->cc_src;
- dst = env->cc_dest;
- res = env->cc_result;
+ src = src & 0x80000000;
+ dst = dst & 0x80000000;
if ((res & 0x80000000L) != 0L)
{
flags |= N_FLAG;
- if (((src & 0x80000000L) == 0L)
- && ((dst & 0x80000000L) == 0L))
- {
+ if (!src && !dst)
flags |= V_FLAG;
- }
- else if (((src & 0x80000000L) != 0L) &&
- ((dst & 0x80000000L) != 0L))
- {
+ else if (src & dst)
flags |= R_FLAG;
- }
}
else
{
if (res == 0L)
flags |= Z_FLAG;
- if (((src & 0x80000000L) != 0L)
- && ((dst & 0x80000000L) != 0L))
+ if (src & dst)
flags |= V_FLAG;
- if ((dst & 0x80000000L) != 0L
- || (src & 0x80000000L) != 0L)
+ if (dst | src)
flags |= R_FLAG;
}
- evaluate_flags_writeback(flags);
+ return evaluate_flags_writeback(flags, ccs);
}
-void helper_evaluate_flags_alu_4(void)
+uint32_t helper_evaluate_flags_alu_4(uint32_t ccs,
+ uint32_t src, uint32_t dst, uint32_t res)
{
- uint32_t src;
- uint32_t dst;
- uint32_t res;
uint32_t flags = 0;
- src = env->cc_src;
- dst = env->cc_dest;
- res = env->cc_result;
+ src = src & 0x80000000;
+ dst = dst & 0x80000000;
if ((res & 0x80000000L) != 0L)
{
flags |= N_FLAG;
- if (((src & 0x80000000L) == 0L)
- && ((dst & 0x80000000L) == 0L))
- {
+ if (!src && !dst)
flags |= V_FLAG;
- }
- else if (((src & 0x80000000L) != 0L) &&
- ((dst & 0x80000000L) != 0L))
- {
+ else if (src & dst)
flags |= C_FLAG;
- }
}
else
{
if (res == 0L)
flags |= Z_FLAG;
- if (((src & 0x80000000L) != 0L)
- && ((dst & 0x80000000L) != 0L))
+ if (src & dst)
flags |= V_FLAG;
- if ((dst & 0x80000000L) != 0L
- || (src & 0x80000000L) != 0L)
+ if (dst | src)
flags |= C_FLAG;
}
- if (env->cc_op == CC_OP_SUB
- || env->cc_op == CC_OP_CMP) {
- flags ^= C_FLAG;
- }
- evaluate_flags_writeback(flags);
+ return evaluate_flags_writeback(flags, ccs);
}
-void helper_evaluate_flags_move_4 (void)
+uint32_t helper_evaluate_flags_sub_4(uint32_t ccs,
+ uint32_t src, uint32_t dst, uint32_t res)
{
- uint32_t src;
- uint32_t res;
uint32_t flags = 0;
- src = env->cc_src;
- res = env->cc_result;
+ src = (~src) & 0x80000000;
+ dst = dst & 0x80000000;
+
+ if ((res & 0x80000000L) != 0L)
+ {
+ flags |= N_FLAG;
+ if (!src && !dst)
+ flags |= V_FLAG;
+ else if (src & dst)
+ flags |= C_FLAG;
+ }
+ else
+ {
+ if (res == 0L)
+ flags |= Z_FLAG;
+ if (src & dst)
+ flags |= V_FLAG;
+ if (dst | src)
+ flags |= C_FLAG;
+ }
+
+ flags ^= C_FLAG;
+ return evaluate_flags_writeback(flags, ccs);
+}
+
+uint32_t helper_evaluate_flags_move_4(uint32_t ccs, uint32_t res)
+{
+ uint32_t flags = 0;
if ((int32_t)res < 0)
flags |= N_FLAG;
else if (res == 0L)
flags |= Z_FLAG;
- evaluate_flags_writeback(flags);
+ return evaluate_flags_writeback(flags, ccs);
}
-void helper_evaluate_flags_move_2 (void)
+uint32_t helper_evaluate_flags_move_2(uint32_t ccs, uint32_t res)
{
- uint32_t src;
uint32_t flags = 0;
- uint16_t res;
-
- src = env->cc_src;
- res = env->cc_result;
if ((int16_t)res < 0L)
flags |= N_FLAG;
else if (res == 0)
flags |= Z_FLAG;
- evaluate_flags_writeback(flags);
+ return evaluate_flags_writeback(flags, ccs);
}
/* TODO: This is expensive. We could split things up and only evaluate part of
CCR on a need to know basis. For now, we simply re-evaluate everything. */
-void helper_evaluate_flags (void)
+void helper_evaluate_flags(void)
{
- uint32_t src;
- uint32_t dst;
- uint32_t res;
+ uint32_t src, dst, res;
uint32_t flags = 0;
src = env->cc_src;
dst = env->cc_dest;
res = env->cc_result;
+ if (env->cc_op == CC_OP_SUB || env->cc_op == CC_OP_CMP)
+ src = ~src;
/* Now, evaluate the flags. This stuff is based on
Per Zander's CRISv10 simulator. */
break;
}
- if (env->cc_op == CC_OP_SUB
- || env->cc_op == CC_OP_CMP) {
+ if (env->cc_op == CC_OP_SUB || env->cc_op == CC_OP_CMP)
flags ^= C_FLAG;
+
+ env->pregs[PR_CCS] = evaluate_flags_writeback(flags, env->pregs[PR_CCS]);
+}
+
+void helper_top_evaluate_flags(void)
+{
+ switch (env->cc_op)
+ {
+ case CC_OP_MCP:
+ env->pregs[PR_CCS] = helper_evaluate_flags_mcp(
+ env->pregs[PR_CCS], env->cc_src,
+ env->cc_dest, env->cc_result);
+ break;
+ case CC_OP_MULS:
+ env->pregs[PR_CCS] = helper_evaluate_flags_muls(
+ env->pregs[PR_CCS], env->cc_result,
+ env->pregs[PR_MOF]);
+ break;
+ case CC_OP_MULU:
+ env->pregs[PR_CCS] = helper_evaluate_flags_mulu(
+ env->pregs[PR_CCS], env->cc_result,
+ env->pregs[PR_MOF]);
+ break;
+ case CC_OP_MOVE:
+ case CC_OP_AND:
+ case CC_OP_OR:
+ case CC_OP_XOR:
+ case CC_OP_ASR:
+ case CC_OP_LSR:
+ case CC_OP_LSL:
+ switch (env->cc_size)
+ {
+ case 4:
+ env->pregs[PR_CCS] =
+ helper_evaluate_flags_move_4(
+ env->pregs[PR_CCS],
+ env->cc_result);
+ break;
+ case 2:
+ env->pregs[PR_CCS] =
+ helper_evaluate_flags_move_2(
+ env->pregs[PR_CCS],
+ env->cc_result);
+ break;
+ default:
+ helper_evaluate_flags();
+ break;
+ }
+ break;
+ case CC_OP_FLAGS:
+ /* live. */
+ break;
+ case CC_OP_SUB:
+ case CC_OP_CMP:
+ if (env->cc_size == 4)
+ env->pregs[PR_CCS] =
+ helper_evaluate_flags_sub_4(
+ env->pregs[PR_CCS],
+ env->cc_src, env->cc_dest,
+ env->cc_result);
+ else
+ helper_evaluate_flags();
+ break;
+ default:
+ {
+ switch (env->cc_size)
+ {
+ case 4:
+ env->pregs[PR_CCS] =
+ helper_evaluate_flags_alu_4(
+ env->pregs[PR_CCS],
+ env->cc_src, env->cc_dest,
+ env->cc_result);
+ break;
+ default:
+ helper_evaluate_flags();
+ break;
+ }
+ }
+ break;
}
- evaluate_flags_writeback(flags);
}
projects / qemu / blobdiff