* 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 <stdlib.h>
+#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu/host-utils.h"
#include "exec/helper-proto.h"
+#include "exec/exec-all.h"
#include "exec/cpu_ldst.h"
+#include <zlib.h> /* for crc32 */
+
+
+/* Exception helpers */
+
+static void QEMU_NORETURN
+raise_exception_sync_internal(CPUTriCoreState *env, uint32_t class, int tin,
+ uintptr_t pc, uint32_t fcd_pc)
+{
+ CPUState *cs = CPU(tricore_env_get_cpu(env));
+ /* in case we come from a helper-call we need to restore the PC */
+ if (pc) {
+ cpu_restore_state(cs, pc);
+ }
+
+ /* Tin is loaded into d[15] */
+ env->gpr_d[15] = tin;
+
+ if (class == TRAPC_CTX_MNG && tin == TIN3_FCU) {
+ /* upper context cannot be saved, if the context list is empty */
+ } else {
+ helper_svucx(env);
+ }
+
+ /* The return address in a[11] is updated */
+ if (class == TRAPC_CTX_MNG && tin == TIN3_FCD) {
+ env->SYSCON |= MASK_SYSCON_FCD_SF;
+ /* when we run out of CSAs after saving a context a FCD trap is taken
+ and the return address is the start of the trap handler which used
+ the last CSA */
+ env->gpr_a[11] = fcd_pc;
+ } else if (class == TRAPC_SYSCALL) {
+ env->gpr_a[11] = env->PC + 4;
+ } else {
+ env->gpr_a[11] = env->PC;
+ }
+ /* The stack pointer in A[10] is set to the Interrupt Stack Pointer (ISP)
+ when the processor was not previously using the interrupt stack
+ (in case of PSW.IS = 0). The stack pointer bit is set for using the
+ interrupt stack: PSW.IS = 1. */
+ if ((env->PSW & MASK_PSW_IS) == 0) {
+ env->gpr_a[10] = env->ISP;
+ }
+ env->PSW |= MASK_PSW_IS;
+ /* The I/O mode is set to Supervisor mode, which means all permissions
+ are enabled: PSW.IO = 10 B .*/
+ env->PSW |= (2 << 10);
+
+ /*The current Protection Register Set is set to 0: PSW.PRS = 00 B .*/
+ env->PSW &= ~MASK_PSW_PRS;
+
+ /* The Call Depth Counter (CDC) is cleared, and the call depth limit is
+ set for 64: PSW.CDC = 0000000 B .*/
+ env->PSW &= ~MASK_PSW_CDC;
+
+ /* Call Depth Counter is enabled, PSW.CDE = 1. */
+ env->PSW |= MASK_PSW_CDE;
+
+ /* Write permission to global registers A[0], A[1], A[8], A[9] is
+ disabled: PSW.GW = 0. */
+ env->PSW &= ~MASK_PSW_GW;
+
+ /*The interrupt system is globally disabled: ICR.IE = 0. The ‘old’
+ ICR.IE and ICR.CCPN are saved */
+
+ /* PCXI.PIE = ICR.IE */
+ env->PCXI = ((env->PCXI & ~MASK_PCXI_PIE) +
+ ((env->ICR & MASK_ICR_IE) << 15));
+ /* PCXI.PCPN = ICR.CCPN */
+ env->PCXI = (env->PCXI & 0xffffff) +
+ ((env->ICR & MASK_ICR_CCPN) << 24);
+ /* Update PC using the trap vector table */
+ env->PC = env->BTV | (class << 5);
+
+ cpu_loop_exit(cs);
+}
+
+void helper_raise_exception_sync(CPUTriCoreState *env, uint32_t class,
+ uint32_t tin)
+{
+ raise_exception_sync_internal(env, class, tin, 0, 0);
+}
+
+static void raise_exception_sync_helper(CPUTriCoreState *env, uint32_t class,
+ uint32_t tin, uintptr_t pc)
+{
+ raise_exception_sync_internal(env, class, tin, pc, 0);
+}
/* Addressing mode helper */
} else {
result = INT64_MIN;
}
+ } else {
+ env->PSW_USB_V = 0;
}
} else {
if (ovf < 0) {
int32_t eq_pos = x_sign & ((r1 >> 32) == r2);
int32_t eq_neg = x_sign & ((r1 >> 32) == -r2);
uint32_t quotient;
- uint64_t ret, remainder;
+ uint64_t remainder;
if ((q_sign & ~eq_neg) | eq_pos) {
quotient = (r1 + 1) & 0xffffffff;
} else {
remainder = (r1 & 0xffffffff00000000ull);
}
- ret = remainder|quotient;
- return ret;
+ return remainder | quotient;
}
uint64_t helper_dvstep(uint64_t r1, uint32_t r2)
return ((uint64_t)remainder << 32) | (uint32_t)dividend_quotient;
}
+uint64_t helper_divide(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
+{
+ int32_t quotient, remainder;
+ int32_t dividend = (int32_t)r1;
+ int32_t divisor = (int32_t)r2;
+
+ if (divisor == 0) {
+ if (dividend >= 0) {
+ quotient = 0x7fffffff;
+ remainder = 0;
+ } else {
+ quotient = 0x80000000;
+ remainder = 0;
+ }
+ env->PSW_USB_V = (1 << 31);
+ } else if ((divisor == 0xffffffff) && (dividend == 0x80000000)) {
+ quotient = 0x7fffffff;
+ remainder = 0;
+ env->PSW_USB_V = (1 << 31);
+ } else {
+ remainder = dividend % divisor;
+ quotient = (dividend - remainder)/divisor;
+ env->PSW_USB_V = 0;
+ }
+ env->PSW_USB_SV |= env->PSW_USB_V;
+ env->PSW_USB_AV = 0;
+ return ((uint64_t)remainder << 32) | (uint32_t)quotient;
+}
+
+uint64_t helper_divide_u(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
+{
+ uint32_t quotient, remainder;
+ uint32_t dividend = r1;
+ uint32_t divisor = r2;
+
+ if (divisor == 0) {
+ quotient = 0xffffffff;
+ remainder = 0;
+ env->PSW_USB_V = (1 << 31);
+ } else {
+ remainder = dividend % divisor;
+ quotient = (dividend - remainder)/divisor;
+ env->PSW_USB_V = 0;
+ }
+ env->PSW_USB_SV |= env->PSW_USB_V;
+ env->PSW_USB_AV = 0;
+ return ((uint64_t)remainder << 32) | quotient;
+}
+
uint64_t helper_mul_h(uint32_t arg00, uint32_t arg01,
uint32_t arg10, uint32_t arg11, uint32_t n)
{
- uint64_t ret;
uint32_t result0, result1;
int32_t sc1 = ((arg00 & 0xffff) == 0x8000) &&
} else {
result0 = (((uint32_t)(arg01 * arg11)) << n);
}
- ret = (((uint64_t)result1 << 32)) | result0;
- return ret;
+ return (((uint64_t)result1 << 32)) | result0;
}
uint64_t helper_mulm_h(uint32_t arg00, uint32_t arg01,
return (result1 & 0xffff0000) | (result0 >> 16);
}
+uint32_t helper_crc32(uint32_t arg0, uint32_t arg1)
+{
+ uint8_t buf[4];
+ stl_be_p(buf, arg0);
+
+ return crc32(arg1, buf, 4);
+}
+
/* context save area (CSA) related helpers */
static int cdc_increment(target_ulong *psw)
static void save_context_upper(CPUTriCoreState *env, int ea)
{
cpu_stl_data(env, ea, env->PCXI);
- cpu_stl_data(env, ea+4, env->PSW);
+ cpu_stl_data(env, ea+4, psw_read(env));
cpu_stl_data(env, ea+8, env->gpr_a[10]);
cpu_stl_data(env, ea+12, env->gpr_a[11]);
cpu_stl_data(env, ea+16, env->gpr_d[8]);
/* if (FCX == 0) trap(FCU); */
if (env->FCX == 0) {
/* FCU trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_FCU, GETPC());
}
/* if (PSW.CDE) then if (cdc_increment()) then trap(CDO); */
if (psw & MASK_PSW_CDE) {
if (cdc_increment(&psw)) {
/* CDO trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_CDO, GETPC());
}
}
/* PSW.CDE = 1;*/
/* if (tmp_FCX == LCX) trap(FCD);*/
if (tmp_FCX == env->LCX) {
/* FCD trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_FCD, GETPC());
}
psw_write(env, psw);
}
psw = psw_read(env);
/* if (PSW.CDE) then if (cdc_decrement()) then trap(CDU);*/
- if (env->PSW & MASK_PSW_CDE) {
- if (cdc_decrement(&(env->PSW))) {
+ if (psw & MASK_PSW_CDE) {
+ if (cdc_decrement(&psw)) {
/* CDU trap */
+ psw_write(env, psw);
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_CDU, GETPC());
}
}
/* if (PCXI[19: 0] == 0) then trap(CSU); */
if ((env->PCXI & 0xfffff) == 0) {
/* CSU trap */
+ psw_write(env, psw);
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_CSU, GETPC());
}
/* if (PCXI.UL == 0) then trap(CTYP); */
if ((env->PCXI & MASK_PCXI_UL) == 0) {
/* CTYP trap */
+ cdc_increment(&psw); /* restore to the start of helper */
+ psw_write(env, psw);
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_CTYP, GETPC());
}
/* PC = {A11 [31: 1], 1’b0}; */
env->PC = env->gpr_a[11] & 0xfffffffe;
if (env->FCX == 0) {
/* FCU trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_FCU, GETPC());
}
tmp_FCX = env->FCX;
if (tmp_FCX == env->LCX) {
/* FCD trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_FCD, GETPC());
}
}
/* if (PCXI[19: 0] == 0) then trap(CSU); */
if ((env->PCXI & 0xfffff) == 0) {
/* raise csu trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_CSU, GETPC());
}
/* if (PCXI.UL == 0) then trap(CTYP); */
if ((env->PCXI & MASK_PCXI_UL) == 0) {
/* raise CTYP trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_CTYP, GETPC());
}
/* if (!cdc_zero() AND PSW.CDE) then trap(NEST); */
if (!cdc_zero(&(env->PSW)) && (env->PSW & MASK_PSW_CDE)) {
- /* raise MNG trap */
+ /* raise NEST trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_NEST, GETPC());
}
+ env->PC = env->gpr_a[11] & ~0x1;
/* ICR.IE = PCXI.PIE; */
env->ICR = (env->ICR & ~MASK_ICR_IE) + ((env->PCXI & MASK_PCXI_PIE) >> 15);
/* ICR.CCPN = PCXI.PCPN; */
env->PC = (env->gpr_a[11] & ~0x1);
/* ICR.IE = PCXI.PIE; */
env->ICR = (env->ICR & ~MASK_ICR_IE) |
- ((env->PCXI & ~MASK_PCXI_PIE) >> 15);
+ ((env->PCXI & MASK_PCXI_PIE) >> 15);
/* ICR.CCPN = PCXI.PCPN; */
env->ICR = (env->ICR & ~MASK_ICR_CCPN) |
- ((env->PCXI & ~MASK_PCXI_PCPN) >> 24);
+ ((env->PCXI & MASK_PCXI_PCPN) >> 24);
/* {PCXI, PSW, A[10], A[11]} = M(DCX, 4 * word); */
env->PCXI = cpu_ldl_data(env, env->DCX);
psw_write(env, cpu_ldl_data(env, env->DCX+4));
if (env->FCX == 0) {
/* FCU trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_FCU, GETPC());
}
/* tmp_FCX = FCX; */
tmp_FCX = env->FCX;
/* if (tmp_FCX == LCX) trap(FCD);*/
if (tmp_FCX == env->LCX) {
/* FCD trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_FCD, GETPC());
+ }
+}
+
+void helper_svucx(CPUTriCoreState *env)
+{
+ target_ulong tmp_FCX;
+ target_ulong ea;
+ target_ulong new_FCX;
+
+ if (env->FCX == 0) {
+ /* FCU trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_FCU, GETPC());
+ }
+ /* tmp_FCX = FCX; */
+ tmp_FCX = env->FCX;
+ /* EA = {FCX.FCXS, 6'b0, FCX.FCXO, 6'b0}; */
+ ea = ((env->FCX & MASK_FCX_FCXS) << 12) +
+ ((env->FCX & MASK_FCX_FCXO) << 6);
+ /* new_FCX = M(EA, word); */
+ new_FCX = cpu_ldl_data(env, ea);
+ /* M(EA, 16 * word) = {PCXI, PSW, A[10], A[11], D[8], D[9], D[10], D[11],
+ A[12], A[13], A[14], A[15], D[12], D[13], D[14],
+ D[15]}; */
+ save_context_upper(env, ea);
+
+ /* PCXI.PCPN = ICR.CCPN; */
+ env->PCXI = (env->PCXI & 0xffffff) +
+ ((env->ICR & MASK_ICR_CCPN) << 24);
+ /* PCXI.PIE = ICR.IE; */
+ env->PCXI = ((env->PCXI & ~MASK_PCXI_PIE) +
+ ((env->ICR & MASK_ICR_IE) << 15));
+ /* PCXI.UL = 1; */
+ env->PCXI |= MASK_PCXI_UL;
+
+ /* PCXI[19: 0] = FCX[19: 0]; */
+ env->PCXI = (env->PCXI & 0xfff00000) + (env->FCX & 0xfffff);
+ /* FCX[19: 0] = new_FCX[19: 0]; */
+ env->FCX = (env->FCX & 0xfff00000) + (new_FCX & 0xfffff);
+
+ /* if (tmp_FCX == LCX) trap(FCD);*/
+ if (tmp_FCX == env->LCX) {
+ /* FCD trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_FCD, GETPC());
}
}
/* if (PCXI[19: 0] == 0) then trap(CSU); */
if ((env->PCXI & 0xfffff) == 0) {
/* CSU trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_CSU, GETPC());
}
/* if (PCXI.UL == 1) then trap(CTYP); */
- if ((env->PCXI & MASK_PCXI_UL) == 1) {
+ if ((env->PCXI & MASK_PCXI_UL) != 0) {
/* CTYP trap */
+ raise_exception_sync_helper(env, TRAPC_CTX_MNG, TIN3_CTYP, GETPC());
}
/* EA = {PCXI.PCXS, 6'b0, PCXI.PCXO, 6'b0}; */
ea = ((env->PCXI & MASK_PCXI_PCXS) << 12) +
((env->PCXI & MASK_PCXI_PCXO) << 6);
/* {new_PCXI, A[11], A[10], A[11], D[8], D[9], D[10], D[11], A[12],
A[13], A[14], A[15], D[12], D[13], D[14], D[15]} = M(EA, 16 * word); */
- restore_context_upper(env, ea, &new_PCXI, &env->gpr_a[11]);
+ restore_context_lower(env, ea, &env->gpr_a[11], &new_PCXI);
/* M(EA, word) = FCX; */
cpu_stl_data(env, ea, env->FCX);
/* M(EA, word) = FCX; */
cpu_loop_exit(cs);
}
-void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
- uintptr_t retaddr)
+void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
+ int mmu_idx, uintptr_t retaddr)
{
int ret;
- ret = cpu_tricore_handle_mmu_fault(cs, addr, is_write, mmu_idx);
+ ret = cpu_tricore_handle_mmu_fault(cs, addr, access_type, mmu_idx);
if (ret) {
TriCoreCPU *cpu = TRICORE_CPU(cs);
CPUTriCoreState *env = &cpu->env;
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