#include "armemu.h"
#include "ansidecl.h"
-extern unsigned ARMul_CoProInit (ARMul_State * state);
-extern void ARMul_CoProExit (ARMul_State * state);
-extern void ARMul_CoProAttach (ARMul_State * state, unsigned number,
- ARMul_CPInits * init, ARMul_CPExits * exit,
- ARMul_LDCs * ldc, ARMul_STCs * stc,
- ARMul_MRCs * mrc, ARMul_MCRs * mcr,
- ARMul_CDPs * cdp,
- ARMul_CPReads * read, ARMul_CPWrites * write);
-extern void ARMul_CoProDetach (ARMul_State * state, unsigned number);
+/* Dummy Co-processors. */
+static unsigned
+NoCoPro3R (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned a ATTRIBUTE_UNUSED,
+ ARMword b ATTRIBUTE_UNUSED)
+{
+ return ARMul_CANT;
+}
-/***************************************************************************\
-* Dummy Co-processors *
-\***************************************************************************/
+static unsigned
+NoCoPro4R (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned a ATTRIBUTE_UNUSED,
+ ARMword b ATTRIBUTE_UNUSED,
+ ARMword c ATTRIBUTE_UNUSED)
+{
+ return ARMul_CANT;
+}
+
+static unsigned
+NoCoPro4W (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned a ATTRIBUTE_UNUSED,
+ ARMword b ATTRIBUTE_UNUSED,
+ ARMword * c ATTRIBUTE_UNUSED)
+{
+ return ARMul_CANT;
+}
-static unsigned NoCoPro3R (ARMul_State * state, unsigned, ARMword);
-static unsigned NoCoPro4R (ARMul_State * state, unsigned, ARMword, ARMword);
-static unsigned NoCoPro4W (ARMul_State * state, unsigned, ARMword, ARMword *);
+/* The XScale Co-processors. */
-/***************************************************************************\
-* Define Co-Processor instruction handlers here *
-\***************************************************************************/
+/* Coprocessor 15: System Control. */
+
+/* There are two sets of registers for copro 15.
+ One set is available when opcode_2 is 0 and
+ the other set when opcode_2 >= 1. */
+static ARMword XScale_cp15_opcode_2_is_0_Regs[16];
+static ARMword XScale_cp15_opcode_2_is_not_0_Regs[16];
+/* There are also a set of breakpoint registers
+ which are accessed via CRm instead of opcode_2. */
+static ARMword XScale_cp15_DBR1;
+static ARMword XScale_cp15_DBCON;
+static ARMword XScale_cp15_IBCR0;
+static ARMword XScale_cp15_IBCR1;
+
+static unsigned
+XScale_cp15_init (ARMul_State * state ATTRIBUTE_UNUSED)
+{
+ int i;
+
+ for (i = 16; i--;)
+ {
+ XScale_cp15_opcode_2_is_0_Regs[i] = 0;
+ XScale_cp15_opcode_2_is_not_0_Regs[i] = 0;
+ }
+
+ /* Initialise the processor ID. */
+ XScale_cp15_opcode_2_is_0_Regs[0] = 0x69052000;
+
+ /* Initialise the cache type. */
+ XScale_cp15_opcode_2_is_not_0_Regs[0] = 0x0B1AA1AA;
+
+ /* Initialise the ARM Control Register. */
+ XScale_cp15_opcode_2_is_0_Regs[1] = 0x00000078;
+
+}
+
+/* Check an access to a register. */
+
+static unsigned
+check_cp15_access (ARMul_State * state,
+ unsigned reg,
+ unsigned CRm,
+ unsigned opcode_1,
+ unsigned opcode_2)
+{
+ /* Do not allow access to these register in USER mode. */
+ if (state->Mode == USER26MODE || state->Mode == USER32MODE)
+ return ARMul_CANT;
+
+ /* Opcode_1should be zero. */
+ if (opcode_1 != 0)
+ return ARMul_CANT;
+
+ /* Different register have different access requirements. */
+ switch (reg)
+ {
+ case 0:
+ case 1:
+ /* CRm must be 0. Opcode_2 can be anything. */
+ if (CRm != 0)
+ return ARMul_CANT;
+ break;
+ case 2:
+ case 3:
+ /* CRm must be 0. Opcode_2 must be zero. */
+ if ((CRm != 0) || (opcode_2 != 0))
+ return ARMul_CANT;
+ break;
+ case 4:
+ /* Access not allowed. */
+ return ARMul_CANT;
+ case 5:
+ case 6:
+ /* Opcode_2 must be zero. CRm must be 0. */
+ if ((CRm != 0) || (opcode_2 != 0))
+ return ARMul_CANT;
+ break;
+ case 7:
+ /* Permissable combinations:
+ Opcode_2 CRm
+ 0 5
+ 0 6
+ 0 7
+ 1 5
+ 1 6
+ 1 10
+ 4 10
+ 5 2
+ 6 5 */
+ switch (opcode_2)
+ {
+ default: return ARMul_CANT;
+ case 6: if (CRm != 5) return ARMul_CANT; break;
+ case 5: if (CRm != 2) return ARMul_CANT; break;
+ case 4: if (CRm != 10) return ARMul_CANT; break;
+ case 1: if ((CRm != 5) && (CRm != 6) && (CRm != 10)) return ARMul_CANT; break;
+ case 0: if ((CRm < 5) || (CRm > 7)) return ARMul_CANT; break;
+ }
+ break;
+
+ case 8:
+ /* Permissable combinations:
+ Opcode_2 CRm
+ 0 5
+ 0 6
+ 0 7
+ 1 5
+ 1 6 */
+ if (opcode_2 > 1)
+ return ARMul_CANT;
+ if ((CRm < 5) || (CRm > 7))
+ return ARMul_CANT;
+ if (opcode_2 == 1 && CRm == 7)
+ return ARMul_CANT;
+ break;
+ case 9:
+ /* Opcode_2 must be zero or one. CRm must be 1 or 2. */
+ if ( ((CRm != 0) && (CRm != 1))
+ || ((opcode_2 != 1) && (opcode_2 != 2)))
+ return ARMul_CANT;
+ break;
+ case 10:
+ /* Opcode_2 must be zero or one. CRm must be 4 or 8. */
+ if ( ((CRm != 0) && (CRm != 1))
+ || ((opcode_2 != 4) && (opcode_2 != 8)))
+ return ARMul_CANT;
+ break;
+ case 11:
+ /* Access not allowed. */
+ return ARMul_CANT;
+ case 12:
+ /* Access not allowed. */
+ return ARMul_CANT;
+ case 13:
+ /* Opcode_2 must be zero. CRm must be 0. */
+ if ((CRm != 0) || (opcode_2 != 0))
+ return ARMul_CANT;
+ break;
+ case 14:
+ /* Opcode_2 must be 0. CRm must be 0, 3, 4, 8 or 9. */
+ if (opcode_2 != 0)
+ return ARMul_CANT;
+
+ if ((CRm != 0) && (CRm != 3) && (CRm != 4) && (CRm != 8) && (CRm != 9))
+ return ARMul_CANT;
+ break;
+ case 15:
+ /* Opcode_2 must be zero. CRm must be 1. */
+ if ((CRm != 1) || (opcode_2 != 0))
+ return ARMul_CANT;
+ break;
+ default:
+ /* Should never happen. */
+ return ARMul_CANT;
+ }
+
+ return ARMul_DONE;
+}
+
+/* Store a value into one of coprocessor 15's registers. */
+
+void
+write_cp15_reg (unsigned reg, unsigned opcode_2, unsigned CRm, ARMword value)
+{
+ if (opcode_2)
+ {
+ switch (reg)
+ {
+ case 0: /* Cache Type. */
+ /* Writes are not allowed. */
+ return;
+
+ case 1: /* Auxillary Control. */
+ /* Only BITS (5, 4) and BITS (1, 0) can be written. */
+ value &= 0x33;
+ break;
+
+ default:
+ return;
+ }
+
+ XScale_cp15_opcode_2_is_not_0_Regs [reg] = value;
+ }
+ else
+ {
+ switch (reg)
+ {
+ case 0: /* ID. */
+ /* Writes are not allowed. */
+ return;
+
+ case 1: /* ARM Control. */
+ /* Only BITS (13, 11), BITS (9, 7) and BITS (2, 0) can be written.
+ BITS (31, 14) and BIT (10) write as zero, BITS (6, 3) write as one. */
+ value &= 0x00003b87;
+ value |= 0x00000078;
+ break;
+
+ case 2: /* Translation Table Base. */
+ /* Only BITS (31, 14) can be written. */
+ value &= 0xffffc000;
+ break;
+
+ case 3: /* Domain Access Control. */
+ /* All bits writable. */
+ break;
+
+ case 5: /* Fault Status Register. */
+ /* BITS (10, 9) and BITS (7, 0) can be written. */
+ value &= 0x000006ff;
+ break;
+
+ case 6: /* Fault Address Register. */
+ /* All bits writable. */
+ break;
+
+ case 7: /* Cache Functions. */
+ case 8: /* TLB Operations. */
+ case 10: /* TLB Lock Down. */
+ /* Ignore writes. */
+ return;
+
+ case 9: /* Data Cache Lock. */
+ /* Only BIT (0) can be written. */
+ value &= 0x1;
+ break;
+
+ case 13: /* Process ID. */
+ /* Only BITS (31, 25) are writable. */
+ value &= 0xfe000000;
+ break;
+
+ case 14: /* DBR0, DBR1, DBCON, IBCR0, IBCR1 */
+ /* All bits can be written. Which register is accessed is
+ dependent upon CRm. */
+ switch (CRm)
+ {
+ case 0: /* DBR0 */
+ break;
+ case 3: /* DBR1 */
+ XScale_cp15_DBR1 = value;
+ break;
+ case 4: /* DBCON */
+ XScale_cp15_DBCON = value;
+ break;
+ case 8: /* IBCR0 */
+ XScale_cp15_IBCR0 = value;
+ break;
+ case 9: /* IBCR1 */
+ XScale_cp15_IBCR1 = value;
+ break;
+ default:
+ return;
+ }
+ break;
+
+ case 15: /* Coprpcessor Access Register. */
+ /* Access is only valid if CRm == 1. */
+ if (CRm != 1)
+ return;
+
+ /* Only BITS (13, 0) may be written. */
+ value &= 0x00003fff;
+ break;
+
+ default:
+ return;
+ }
+
+ XScale_cp15_opcode_2_is_0_Regs [reg] = value;
+ }
+
+ return;
+}
+
+/* Return the value in a cp13 register. */
+
+static ARMword
+read_cp15_reg (unsigned reg, unsigned opcode_2, unsigned CRm)
+{
+ if (opcode_2 == 0)
+ {
+ if (reg == 15 && CRm != 1)
+ return 0;
+
+ if (reg == 14)
+ {
+ switch (CRm)
+ {
+ case 3: return XScale_cp15_DBR1;
+ case 4: return XScale_cp15_DBCON;
+ case 8: return XScale_cp15_IBCR0;
+ case 9: return XScale_cp15_IBCR1;
+ default:
+ break;
+ }
+ }
+
+ return XScale_cp15_opcode_2_is_0_Regs [reg];
+ }
+ else
+ return XScale_cp15_opcode_2_is_not_0_Regs [reg];
+
+ return 0;
+}
+
+static unsigned
+XScale_cp15_LDC (ARMul_State * state, unsigned type, ARMword instr, ARMword data)
+{
+ unsigned reg = BITS (12, 15);
+ unsigned result;
+
+ result = check_cp15_access (state, reg, 0, 0, 0);
+
+ if (result == ARMul_DONE && type == ARMul_DATA)
+ write_cp15_reg (reg, 0, 0, data);
+
+ return result;
+}
+
+static unsigned
+XScale_cp15_STC (ARMul_State * state, unsigned type, ARMword instr, ARMword * data)
+{
+ unsigned reg = BITS (12, 15);
+ unsigned result;
+
+ result = check_cp15_access (state, reg, 0, 0, 0);
+
+ if (result == ARMul_DONE && type == ARMul_DATA)
+ * data = read_cp15_reg (reg, 0, 0);
+
+ return result;
+}
+
+static unsigned
+XScale_cp15_MRC (ARMul_State * state,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword * value)
+{
+ unsigned opcode_2 = BITS (5, 7);
+ unsigned CRm = BITS (0, 3);
+ unsigned reg = BITS (16, 19);
+ unsigned result;
+
+ result = check_cp15_access (state, reg, CRm, BITS (21, 23), opcode_2);
+
+ if (result == ARMul_DONE)
+ * value = read_cp15_reg (reg, opcode_2, CRm);
+
+ return result;
+}
+
+static unsigned
+XScale_cp15_MCR (ARMul_State * state,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword value)
+{
+ unsigned opcode_2 = BITS (5, 7);
+ unsigned CRm = BITS (0, 3);
+ unsigned reg = BITS (16, 19);
+ unsigned result;
+
+ result = check_cp15_access (state, reg, CRm, BITS (21, 23), opcode_2);
+
+ if (result == ARMul_DONE)
+ write_cp15_reg (reg, opcode_2, CRm, value);
+
+ return result;
+}
+
+static unsigned
+XScale_cp15_read_reg (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned reg,
+ ARMword * value)
+{
+ /* FIXME: Not sure what to do about the alternative register set
+ here. For now default to just accessing CRm == 0 registers. */
+ * value = read_cp15_reg (reg, 0, 0);
+
+ return TRUE;
+}
+
+static unsigned
+XScale_cp15_write_reg (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned reg,
+ ARMword value)
+{
+ /* FIXME: Not sure what to do about the alternative register set
+ here. For now default to just accessing CRm == 0 registers. */
+ write_cp15_reg (reg, 0, 0, value);
+
+ return TRUE;
+}
+
+/* Coprocessor 13: Interrupt Controller and Bus Controller. */
+
+/* There are two sets of registers for copro 13.
+ One set (of three registers) is available when CRm is 0
+ and the other set (of six registers) when CRm is 1. */
+
+static ARMword XScale_cp13_CR0_Regs[16];
+static ARMword XScale_cp13_CR1_Regs[16];
+
+static unsigned
+XScale_cp13_init (ARMul_State * state ATTRIBUTE_UNUSED)
+{
+ int i;
+
+ for (i = 16; i--;)
+ {
+ XScale_cp13_CR0_Regs[i] = 0;
+ XScale_cp13_CR1_Regs[i] = 0;
+ }
+}
+
+/* Check an access to a register. */
+
+static unsigned
+check_cp13_access (ARMul_State * state,
+ unsigned reg,
+ unsigned CRm,
+ unsigned opcode_1,
+ unsigned opcode_2)
+{
+ /* Do not allow access to these register in USER mode. */
+ if (state->Mode == USER26MODE || state->Mode == USER32MODE)
+ return ARMul_CANT;
+
+ /* The opcodes should be zero. */
+ if ((opcode_1 != 0) || (opcode_2 != 0))
+ return ARMul_CANT;
+
+ /* Do not allow access to these register if bit 13 of coprocessor
+ 15's register 15 is zero. */
+ if ((XScale_cp15_opcode_2_is_0_Regs[15] & (1 << 13)) == 0)
+ return ARMul_CANT;
+
+ /* Registers 0, 4 and 8 are defined when CRm == 0.
+ Registers 0, 4, 5, 6, 7, 8 are defined when CRm == 1.
+ For all other CRm values undefined behaviour results. */
+ if (CRm == 0)
+ {
+ if (reg == 0 || reg == 4 || reg == 8)
+ return ARMul_DONE;
+ }
+ else if (CRm == 1)
+ {
+ if (reg == 0 || (reg >= 4 && reg <= 8))
+ return ARMul_DONE;
+ }
+
+ return ARMul_CANT;
+}
+
+/* Store a value into one of coprocessor 13's registers. */
+
+static void
+write_cp13_reg (unsigned reg, unsigned CRm, ARMword value)
+{
+ switch (CRm)
+ {
+ case 0:
+ switch (reg)
+ {
+ case 0: /* INTCTL */
+ /* Only BITS (3:0) can be written. */
+ value &= 0xf;
+ break;
+
+ case 4: /* INTSRC */
+ /* No bits may be written. */
+ return;
+
+ case 8: /* INTSTR */
+ /* Only BITS (1:0) can be written. */
+ value &= 0x3;
+ break;
+
+ default:
+ /* Should not happen. Ignore any writes to unimplemented registers. */
+ return;
+ }
+
+ XScale_cp13_CR0_Regs [reg] = value;
+ break;
+
+ case 1:
+ switch (reg)
+ {
+ case 0: /* BCUCTL */
+ /* Only BITS (30:28) and BITS (3:0) can be written.
+ BIT(31) is write ignored. */
+ value &= 0x7000000f;
+ value |= XScale_cp13_CR1_Regs[0] & (1UL << 31);
+ break;
+
+ case 4: /* ELOG0 */
+ case 5: /* ELOG1 */
+ case 6: /* ECAR0 */
+ case 7: /* ECAR1 */
+ /* No bits can be written. */
+ return;
+
+ case 8: /* ECTST */
+ /* Only BITS (7:0) can be written. */
+ value &= 0xff;
+ break;
+
+ default:
+ /* Should not happen. Ignore any writes to unimplemented registers. */
+ return;
+ }
+
+ XScale_cp13_CR1_Regs [reg] = value;
+ break;
+
+ default:
+ /* Should not happen. */
+ break;
+ }
+
+ return;
+}
+
+/* Return the value in a cp13 register. */
+
+static ARMword
+read_cp13_reg (unsigned reg, unsigned CRm)
+{
+ if (CRm == 0)
+ return XScale_cp13_CR0_Regs [reg];
+ else if (CRm == 1)
+ return XScale_cp13_CR1_Regs [reg];
+
+ return 0;
+}
+
+static unsigned
+XScale_cp13_LDC (ARMul_State * state, unsigned type, ARMword instr, ARMword data)
+{
+ unsigned reg = BITS (12, 15);
+ unsigned result;
+
+ result = check_cp13_access (state, reg, 0, 0, 0);
+
+ if (result == ARMul_DONE && type == ARMul_DATA)
+ write_cp13_reg (reg, 0, data);
+
+ return result;
+}
+
+static unsigned
+XScale_cp13_STC (ARMul_State * state, unsigned type, ARMword instr, ARMword * data)
+{
+ unsigned reg = BITS (12, 15);
+ unsigned result;
+
+ result = check_cp13_access (state, reg, 0, 0, 0);
+
+ if (result == ARMul_DONE && type == ARMul_DATA)
+ * data = read_cp13_reg (reg, 0);
+
+ return result;
+}
+
+static unsigned
+XScale_cp13_MRC (ARMul_State * state,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword * value)
+{
+ unsigned CRm = BITS (0, 3);
+ unsigned reg = BITS (16, 19);
+ unsigned result;
+
+ result = check_cp13_access (state, reg, CRm, BITS (21, 23), BITS (5, 7));
+
+ if (result == ARMul_DONE)
+ * value = read_cp13_reg (reg, CRm);
+
+ return result;
+}
+
+static unsigned
+XScale_cp13_MCR (ARMul_State * state,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword value)
+{
+ unsigned CRm = BITS (0, 3);
+ unsigned reg = BITS (16, 19);
+ unsigned result;
+
+ result = check_cp13_access (state, reg, CRm, BITS (21, 23), BITS (5, 7));
+
+ if (result == ARMul_DONE)
+ write_cp13_reg (reg, CRm, value);
+
+ return result;
+}
+
+static unsigned
+XScale_cp13_read_reg
+(
+ ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned reg,
+ ARMword * value
+)
+{
+ /* FIXME: Not sure what to do about the alternative register set
+ here. For now default to just accessing CRm == 0 registers. */
+ * value = read_cp13_reg (reg, 0);
+
+ return TRUE;
+}
+
+static unsigned
+XScale_cp13_write_reg
+(
+ ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned reg,
+ ARMword value
+)
+{
+ /* FIXME: Not sure what to do about the alternative register set
+ here. For now default to just accessing CRm == 0 registers. */
+ write_cp13_reg (reg, 0, value);
+
+ return TRUE;
+}
+
+/* Coprocessor 14: Performance Monitoring, Clock and Power management,
+ Software Debug. */
+
+static ARMword XScale_cp14_Regs[16];
+
+static unsigned
+XScale_cp14_init (ARMul_State * state ATTRIBUTE_UNUSED)
+{
+ int i;
+
+ for (i = 16; i--;)
+ XScale_cp14_Regs[i] = 0;
+}
+
+/* Check an access to a register. */
+
+static unsigned
+check_cp14_access (ARMul_State * state,
+ unsigned reg,
+ unsigned CRm,
+ unsigned opcode1,
+ unsigned opcode2)
+{
+ /* Not allowed to access these register in USER mode. */
+ if (state->Mode == USER26MODE || state->Mode == USER32MODE)
+ return ARMul_CANT;
+
+ /* CRm should be zero. */
+ if (CRm != 0)
+ return ARMul_CANT;
+
+ /* OPcodes should be zero. */
+ if (opcode1 != 0 || opcode2 != 0)
+ return ARMul_CANT;
+
+ /* Accessing registers 4 or 5 has unpredicatable results. */
+ if (reg >= 4 && reg <= 5)
+ return ARMul_CANT;
+
+ return ARMul_DONE;
+}
+
+/* Store a value into one of coprocessor 14's registers. */
+
+void
+write_cp14_reg (unsigned reg, ARMword value)
+{
+ switch (reg)
+ {
+ case 0: /* PMNC */
+ /* Only BITS (27:12), BITS (10:8) and BITS (6:0) can be written. */
+ value &= 0x0ffff77f;
+ break;
+
+ case 4:
+ case 5:
+ /* We should not normally reach this code. The debugger interface
+ can bypass the normal checks though, so it could happen. */
+ value = 0;
+ break;
+
+ case 6: /* CCLKCFG */
+ /* Only BITS (3:0) can be written. */
+ value &= 0xf;
+ break;
+
+ case 7: /* PWRMODE */
+ /* Although BITS (1:0) can be written with non-zero values, this would
+ have the side effect of putting the processor to sleep. Thus in
+ order for the register to be read again, it would have to go into
+ ACTIVE mode, which means that any read will see these bits as zero.
+
+ Rather than trying to implement complex reset-to-zero-upon-read logic
+ we just override the write value with zero. */
+ value = 0;
+ break;
+
+ case 10: /* DCSR */
+ /* Only BITS (31:30), BITS (23:22), BITS (20:16) and BITS (5:0) can
+ be written. */
+ value &= 0xc0df003f;
+ break;
+
+ case 11: /* TBREG */
+ /* No writes are permitted. */
+ value = 0;
+ break;
+
+ case 14: /* TXRXCTRL */
+ /* Only BITS (31:30) can be written. */
+ value &= 0xc0000000;
+ break;
+
+ default:
+ /* All bits can be written. */
+ break;
+ }
+
+ XScale_cp14_Regs [reg] = value;
+}
+
+/* Return the value in a cp14 register. Not a static function since
+ it is used by the code to emulate the BKPT instruction in armemu.c. */
+
+ARMword
+read_cp14_reg (unsigned reg)
+{
+ return XScale_cp14_Regs [reg];
+}
+
+static unsigned
+XScale_cp14_LDC (ARMul_State * state, unsigned type, ARMword instr, ARMword data)
+{
+ unsigned reg = BITS (12, 15);
+ unsigned result;
+
+ result = check_cp14_access (state, reg, 0, 0, 0);
+
+ if (result == ARMul_DONE && type == ARMul_DATA)
+ write_cp14_reg (reg, data);
+
+ return result;
+}
+
+static unsigned
+XScale_cp14_STC (ARMul_State * state, unsigned type, ARMword instr, ARMword * data)
+{
+ unsigned reg = BITS (12, 15);
+ unsigned result;
+
+ result = check_cp14_access (state, reg, 0, 0, 0);
+
+ if (result == ARMul_DONE && type == ARMul_DATA)
+ * data = read_cp14_reg (reg);
+
+ return result;
+}
+
+static unsigned
+XScale_cp14_MRC
+(
+ ARMul_State * state,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword * value
+)
+{
+ unsigned reg = BITS (16, 19);
+ unsigned result;
+
+ result = check_cp14_access (state, reg, BITS (0, 3), BITS (21, 23), BITS (5, 7));
+
+ if (result == ARMul_DONE)
+ * value = read_cp14_reg (reg);
+
+ return result;
+}
+
+static unsigned
+XScale_cp14_MCR
+(
+ ARMul_State * state,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword value
+)
+{
+ unsigned reg = BITS (16, 19);
+ unsigned result;
+
+ result = check_cp14_access (state, reg, BITS (0, 3), BITS (21, 23), BITS (5, 7));
+
+ if (result == ARMul_DONE)
+ write_cp14_reg (reg, value);
+
+ return result;
+}
+
+static unsigned
+XScale_cp14_read_reg
+(
+ ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned reg,
+ ARMword * value
+)
+{
+ * value = read_cp14_reg (reg);
+
+ return TRUE;
+}
+
+static unsigned
+XScale_cp14_write_reg
+(
+ ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned reg,
+ ARMword value
+)
+{
+ write_cp14_reg (reg, value);
+
+ return TRUE;
+}
/* Here's ARMulator's MMU definition. A few things to note:
-1) it has eight registers, but only two are defined.
-2) you can only access its registers with MCR and MRC.
-3) MMU Register 0 (ID) returns 0x41440110
-4) Register 1 only has 4 bits defined. Bits 0 to 3 are unused, bit 4
-controls 32/26 bit program space, bit 5 controls 32/26 bit data space,
-bit 6 controls late abort timimg and bit 7 controls big/little endian.
-*/
+ 1) It has eight registers, but only two are defined.
+ 2) You can only access its registers with MCR and MRC.
+ 3) MMU Register 0 (ID) returns 0x41440110
+ 4) Register 1 only has 4 bits defined. Bits 0 to 3 are unused, bit 4
+ controls 32/26 bit program space, bit 5 controls 32/26 bit data space,
+ bit 6 controls late abort timimg and bit 7 controls big/little endian. */
static ARMword MMUReg[8];
{
MMUReg[1] = state->prog32Sig << 4 |
state->data32Sig << 5 | state->lateabtSig << 6 | state->bigendSig << 7;
+
ARMul_ConsolePrint (state, ", MMU present");
- return (TRUE);
+
+ return TRUE;
}
static unsigned
-MMUMRC (ARMul_State * state ATTRIBUTE_UNUSED, unsigned type ATTRIBUTE_UNUSED, ARMword instr, ARMword * value)
+MMUMRC (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword * value)
{
int reg = BITS (16, 19) & 7;
*value = 0x41440110;
else
*value = MMUReg[reg];
- return (ARMul_DONE);
+
+ return ARMul_DONE;
}
static unsigned
-MMUMCR (ARMul_State * state, unsigned type ATTRIBUTE_UNUSED, ARMword instr, ARMword value)
+MMUMCR (ARMul_State * state,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword value)
{
int reg = BITS (16, 19) & 7;
MMUReg[reg] = value;
-
+
if (reg == 1)
{
ARMword p,d,l,b;
l = state->lateabtSig;
b = state->bigendSig;
- state->prog32Sig = value >> 4 & 1;
- state->data32Sig = value >> 5 & 1;
+ state->prog32Sig = value >> 4 & 1;
+ state->data32Sig = value >> 5 & 1;
state->lateabtSig = value >> 6 & 1;
- state->bigendSig = value >> 7 & 1;
+ state->bigendSig = value >> 7 & 1;
- if (p != state->prog32Sig
+ if ( p != state->prog32Sig
|| d != state->data32Sig
|| l != state->lateabtSig
|| b != state->bigendSig)
- state->Emulate = CHANGEMODE; /* Force ARMulator to notice these now. */
+ /* Force ARMulator to notice these now. */
+ state->Emulate = CHANGEMODE;
}
-
+
return ARMul_DONE;
}
-
static unsigned
MMURead (ARMul_State * state ATTRIBUTE_UNUSED, unsigned reg, ARMword * value)
{
*value = 0x41440110;
else if (reg < 8)
*value = MMUReg[reg];
- return (TRUE);
+
+ return TRUE;
}
static unsigned
{
if (reg < 8)
MMUReg[reg] = value;
-
+
if (reg == 1)
{
ARMword p,d,l,b;
l = state->lateabtSig;
b = state->bigendSig;
- state->prog32Sig = value >> 4 & 1;
- state->data32Sig = value >> 5 & 1;
+ state->prog32Sig = value >> 4 & 1;
+ state->data32Sig = value >> 5 & 1;
state->lateabtSig = value >> 6 & 1;
- state->bigendSig = value >> 7 & 1;
-
+ state->bigendSig = value >> 7 & 1;
- if (p != state->prog32Sig
+ if ( p != state->prog32Sig
|| d != state->data32Sig
|| l != state->lateabtSig
|| b != state->bigendSig)
- state->Emulate = CHANGEMODE; /* Force ARMulator to notice these now. */
+ /* Force ARMulator to notice these now. */
+ state->Emulate = CHANGEMODE;
}
-
+
return TRUE;
}
/* What follows is the Validation Suite Coprocessor. It uses two
-co-processor numbers (4 and 5) and has the follwing functionality.
-Sixteen registers. Both co-processor nuimbers can be used in an MCR and
-MRC to access these registers. CP 4 can LDC and STC to and from the
-registers. CP 4 and CP 5 CDP 0 will busy wait for the number of cycles
-specified by a CP register. CP 5 CDP 1 issues a FIQ after a number of
-cycles (specified in a CP register), CDP 2 issues an IRQW in the same
-way, CDP 3 and 4 turn of the FIQ and IRQ source, and CDP 5 stores a 32
-bit time value in a CP register (actually it's the total number of N, S,
-I, C and F cyles) */
+ co-processor numbers (4 and 5) and has the follwing functionality.
+ Sixteen registers. Both co-processor nuimbers can be used in an MCR
+ and MRC to access these registers. CP 4 can LDC and STC to and from
+ the registers. CP 4 and CP 5 CDP 0 will busy wait for the number of
+ cycles specified by a CP register. CP 5 CDP 1 issues a FIQ after a
+ number of cycles (specified in a CP register), CDP 2 issues an IRQW
+ in the same way, CDP 3 and 4 turn of the FIQ and IRQ source, and CDP 5
+ stores a 32 bit time value in a CP register (actually it's the total
+ number of N, S, I, C and F cyles). */
static ARMword ValReg[16];
static unsigned
-ValLDC (ARMul_State * state ATTRIBUTE_UNUSED, unsigned type, ARMword instr, ARMword data)
+ValLDC (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned type,
+ ARMword instr,
+ ARMword data)
{
static unsigned words;
if (type != ARMul_DATA)
- {
- words = 0;
- return (ARMul_DONE);
- }
- if (BIT (22))
- { /* it's a long access, get two words */
- ValReg[BITS (12, 15)] = data;
- if (words++ == 4)
- return (ARMul_DONE);
- else
- return (ARMul_INC);
- }
+ words = 0;
else
- { /* get just one word */
+ {
ValReg[BITS (12, 15)] = data;
- return (ARMul_DONE);
+
+ if (BIT (22))
+ /* It's a long access, get two words. */
+ if (words++ != 4)
+ return ARMul_INC;
}
+
+ return ARMul_DONE;
}
static unsigned
-ValSTC (ARMul_State * state ATTRIBUTE_UNUSED, unsigned type, ARMword instr, ARMword * data)
+ValSTC (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned type,
+ ARMword instr,
+ ARMword * data)
{
static unsigned words;
if (type != ARMul_DATA)
- {
- words = 0;
- return (ARMul_DONE);
- }
- if (BIT (22))
- { /* it's a long access, get two words */
- *data = ValReg[BITS (12, 15)];
- if (words++ == 4)
- return (ARMul_DONE);
- else
- return (ARMul_INC);
- }
+ words = 0;
else
- { /* get just one word */
- *data = ValReg[BITS (12, 15)];
- return (ARMul_DONE);
+ {
+ * data = ValReg[BITS (12, 15)];
+
+ if (BIT (22))
+ /* It's a long access, get two words. */
+ if (words++ != 4)
+ return ARMul_INC;
}
+
+ return ARMul_DONE;
}
static unsigned
-ValMRC (ARMul_State * state ATTRIBUTE_UNUSED, unsigned type ATTRIBUTE_UNUSED, ARMword instr, ARMword * value)
+ValMRC (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword * value)
{
*value = ValReg[BITS (16, 19)];
- return (ARMul_DONE);
+
+ return ARMul_DONE;
}
static unsigned
-ValMCR (ARMul_State * state ATTRIBUTE_UNUSED, unsigned type ATTRIBUTE_UNUSED, ARMword instr, ARMword value)
+ValMCR (ARMul_State * state ATTRIBUTE_UNUSED,
+ unsigned type ATTRIBUTE_UNUSED,
+ ARMword instr,
+ ARMword value)
{
ValReg[BITS (16, 19)] = value;
- return (ARMul_DONE);
+
+ return ARMul_DONE;
}
static unsigned
ValCDP (ARMul_State * state, unsigned type, ARMword instr)
{
static unsigned long finish = 0;
- ARMword howlong;
- howlong = ValReg[BITS (0, 3)];
- if (BITS (20, 23) == 0)
+ if (BITS (20, 23) != 0)
+ return ARMul_CANT;
+
+ if (type == ARMul_FIRST)
{
- if (type == ARMul_FIRST)
- { /* First cycle of a busy wait */
- finish = ARMul_Time (state) + howlong;
- if (howlong == 0)
- return (ARMul_DONE);
- else
- return (ARMul_BUSY);
- }
- else if (type == ARMul_BUSY)
- {
- if (ARMul_Time (state) >= finish)
- return (ARMul_DONE);
- else
- return (ARMul_BUSY);
- }
+ ARMword howlong;
+
+ howlong = ValReg[BITS (0, 3)];
+
+ /* First cycle of a busy wait. */
+ finish = ARMul_Time (state) + howlong;
+
+ return howlong == 0 ? ARMul_DONE : ARMul_BUSY;
+ }
+ else if (type == ARMul_BUSY)
+ {
+ if (ARMul_Time (state) >= finish)
+ return ARMul_DONE;
+ else
+ return ARMul_BUSY;
}
- return (ARMul_CANT);
+
+ return ARMul_CANT;
}
static unsigned
{
state->NfiqSig = LOW;
state->Exception++;
- return (0);
+ return 0;
}
static unsigned
{
state->NirqSig = LOW;
state->Exception++;
- return (0);
+ return 0;
}
static unsigned
ARMword howlong;
howlong = ValReg[BITS (0, 3)];
+
switch ((int) BITS (20, 23))
{
case 0:
if (type == ARMul_FIRST)
- { /* First cycle of a busy wait */
+ {
+ /* First cycle of a busy wait. */
finish = ARMul_Time (state) + howlong;
- if (howlong == 0)
- return (ARMul_DONE);
- else
- return (ARMul_BUSY);
+
+ return howlong == 0 ? ARMul_DONE : ARMul_BUSY;
}
else if (type == ARMul_BUSY)
{
if (ARMul_Time (state) >= finish)
- return (ARMul_DONE);
+ return ARMul_DONE;
else
- return (ARMul_BUSY);
+ return ARMul_BUSY;
}
- return (ARMul_DONE);
+ return ARMul_DONE;
+
case 1:
if (howlong == 0)
ARMul_Abort (state, ARMul_FIQV);
else
ARMul_ScheduleEvent (state, howlong, DoAFIQ);
- return (ARMul_DONE);
+ return ARMul_DONE;
+
case 2:
if (howlong == 0)
ARMul_Abort (state, ARMul_IRQV);
else
ARMul_ScheduleEvent (state, howlong, DoAIRQ);
- return (ARMul_DONE);
+ return ARMul_DONE;
+
case 3:
state->NfiqSig = HIGH;
state->Exception--;
- return (ARMul_DONE);
+ return ARMul_DONE;
+
case 4:
state->NirqSig = HIGH;
state->Exception--;
- return (ARMul_DONE);
+ return ARMul_DONE;
+
case 5:
ValReg[BITS (0, 3)] = ARMul_Time (state);
- return (ARMul_DONE);
+ return ARMul_DONE;
}
- return (ARMul_CANT);
+
+ return ARMul_CANT;
}
/***************************************************************************\
unsigned
ARMul_CoProInit (ARMul_State * state)
{
- register unsigned i;
+ unsigned int i;
- for (i = 0; i < 16; i++) /* initialise tham all first */
+ /* Initialise tham all first. */
+ for (i = 0; i < 16; i++)
ARMul_CoProDetach (state, i);
- /* Install CoPro Instruction handlers here
- The format is
- ARMul_CoProAttach(state, CP Number, Init routine, Exit routine
- LDC routine, STC routine, MRC routine, MCR routine,
- CDP routine, Read Reg routine, Write Reg routine) ;
- */
-
+ /* Install CoPro Instruction handlers here.
+ The format is:
+ ARMul_CoProAttach (state, CP Number,
+ Init routine, Exit routine
+ LDC routine, STC routine,
+ MRC routine, MCR routine,
+ CDP routine,
+ Read Reg routine, Write Reg routine). */
ARMul_CoProAttach (state, 4, NULL, NULL,
ValLDC, ValSTC, ValMRC, ValMCR, ValCDP, NULL, NULL);
ARMul_CoProAttach (state, 15, MMUInit, NULL,
NULL, NULL, MMUMRC, MMUMCR, NULL, MMURead, MMUWrite);
+ ARMul_CoProAttach (state, 13, XScale_cp13_init, NULL,
+ XScale_cp13_LDC, XScale_cp13_STC, XScale_cp13_MRC,
+ XScale_cp13_MCR, NULL, XScale_cp13_read_reg,
+ XScale_cp13_write_reg);
+
+ ARMul_CoProAttach (state, 14, XScale_cp14_init, NULL,
+ XScale_cp14_LDC, XScale_cp14_STC, XScale_cp14_MRC,
+ XScale_cp14_MCR, NULL, XScale_cp14_read_reg,
+ XScale_cp14_write_reg);
+
+ ARMul_CoProAttach (state, 15, XScale_cp15_init, NULL,
+ NULL, NULL, XScale_cp15_MRC, XScale_cp15_MCR,
+ NULL, XScale_cp15_read_reg, XScale_cp15_write_reg);
- /* No handlers below here */
+ /* No handlers below here. */
- for (i = 0; i < 16; i++) /* Call all the initialisation routines */
+ /* Call all the initialisation routines. */
+ for (i = 0; i < 16; i++)
if (state->CPInit[i])
(state->CPInit[i]) (state);
- return (TRUE);
+
+ return TRUE;
}
/***************************************************************************\
for (i = 0; i < 16; i++)
if (state->CPExit[i])
(state->CPExit[i]) (state);
- for (i = 0; i < 16; i++) /* Detach all handlers */
+
+ for (i = 0; i < 16; i++) /* Detach all handlers. */
ARMul_CoProDetach (state, i);
}
\***************************************************************************/
void
-ARMul_CoProAttach (ARMul_State * state, unsigned number,
- ARMul_CPInits * init, ARMul_CPExits * exit,
- ARMul_LDCs * ldc, ARMul_STCs * stc,
- ARMul_MRCs * mrc, ARMul_MCRs * mcr, ARMul_CDPs * cdp,
- ARMul_CPReads * read, ARMul_CPWrites * write)
+ARMul_CoProAttach (ARMul_State * state,
+ unsigned number,
+ ARMul_CPInits * init,
+ ARMul_CPExits * exit,
+ ARMul_LDCs * ldc,
+ ARMul_STCs * stc,
+ ARMul_MRCs * mrc,
+ ARMul_MCRs * mcr,
+ ARMul_CDPs * cdp,
+ ARMul_CPReads * read,
+ ARMul_CPWrites * write)
{
if (init != NULL)
state->CPInit[number] = init;
ARMul_CoProAttach (state, number, NULL, NULL,
NoCoPro4R, NoCoPro4W, NoCoPro4W, NoCoPro4R,
NoCoPro3R, NULL, NULL);
+
state->CPInit[number] = NULL;
state->CPExit[number] = NULL;
state->CPRead[number] = NULL;
state->CPWrite[number] = NULL;
}
-
-/***************************************************************************\
-* There is no CoPro around, so Undefined Instruction trap *
-\***************************************************************************/
-
-static unsigned
-NoCoPro3R (ARMul_State * state ATTRIBUTE_UNUSED,
- unsigned a ATTRIBUTE_UNUSED,
- ARMword b ATTRIBUTE_UNUSED)
-{
- return (ARMul_CANT);
-}
-
-static unsigned
-NoCoPro4R (
- ARMul_State * state ATTRIBUTE_UNUSED,
- unsigned a ATTRIBUTE_UNUSED,
- ARMword b ATTRIBUTE_UNUSED,
- ARMword c ATTRIBUTE_UNUSED)
-{
- return (ARMul_CANT);
-}
-
-static unsigned
-NoCoPro4W (
- ARMul_State * state ATTRIBUTE_UNUSED,
- unsigned a ATTRIBUTE_UNUSED,
- ARMword b ATTRIBUTE_UNUSED,
- ARMword * c ATTRIBUTE_UNUSED)
-{
- return (ARMul_CANT);
-}
temp = TRUE;
break;
case NV:
+ if (state->is_v5)
+ {
+ if (BITS (25, 27) == 5) /* BLX(1) */
+ {
+ ARMword dest;
+
+ state->Reg[14] = pc + 4;
+
+ dest = pc + 8 + 1; /* Force entry into Thumb mode. */
+ if (BIT (23))
+ dest += (NEGBRANCH + (BIT (24) << 1));
+ else
+ dest += POSBRANCH + (BIT (24) << 1);
+
+ WriteR15Branch (state, dest);
+ goto donext;
+ }
+ else if ((instr & 0xFC70F000) == 0xF450F000)
+ /* The PLD instruction. Ignored. */
+ goto donext;
+ else
+ /* UNDEFINED in v5, UNPREDICTABLE in v3, v4, non executed in v1, v2. */
+ ARMul_UndefInstr (state, instr);
+ }
temp = FALSE;
break;
case EQ:
{ /* if the condition codes don't match, stop here */
mainswitch:
+ if (state->is_XScale)
+ {
+ if (BIT (20) == 0 && BITS (25, 27) == 0)
+ {
+ if (BITS (4, 7) == 0xD)
+ {
+ /* XScale Load Consecutive insn. */
+ ARMword temp = GetLS7RHS (state, instr);
+ ARMword temp2 = BIT (23) ? LHS + temp : LHS - temp;
+ ARMword addr = BIT (24) ? temp2 : temp;
+
+ if (BIT (12))
+ ARMul_UndefInstr (state, instr);
+ else if (addr & 7)
+ /* Alignment violation. */
+ ARMul_Abort (state, ARMul_DataAbortV);
+ else
+ {
+ int wb = BIT (24) && BIT (21);
+
+ state->Reg[BITS (12, 15)] =
+ ARMul_LoadWordN (state, addr);
+ state->Reg[BITS (12, 15) + 1] =
+ ARMul_LoadWordN (state, addr + 4);
+ if (wb)
+ LSBase = addr;
+ }
+
+ goto donext;
+ }
+ else if (BITS (4, 7) == 0xF)
+ {
+ /* XScale Store Consecutive insn. */
+ ARMword temp = GetLS7RHS (state, instr);
+ ARMword temp2 = BIT (23) ? LHS + temp : LHS - temp;
+ ARMword addr = BIT (24) ? temp2 : temp;
+
+ if (BIT (12))
+ ARMul_UndefInstr (state, instr);
+ else if (addr & 7)
+ /* Alignment violation. */
+ ARMul_Abort (state, ARMul_DataAbortV);
+ else
+ {
+ ARMul_StoreWordN (state, addr,
+ state->Reg[BITS (12, 15)]);
+ ARMul_StoreWordN (state, addr + 4,
+ state->Reg[BITS (12, 15) + 1]);
+
+ if (BIT (21))
+ LSBase = addr;
+ }
+
+ goto donext;
+ }
+ }
+ }
switch ((int) BITS (20, 27))
{
break;
case 0x10: /* TST reg and MRS CPSR and SWP word */
+ if (state->is_v5e)
+ {
+ if (BIT (4) == 0 && BIT (7) == 1)
+ {
+ /* ElSegundo SMLAxy insn. */
+ ARMword op1 = state->Reg[BITS (0, 3)];
+ ARMword op2 = state->Reg[BITS (8, 11)];
+ ARMword Rn = state->Reg[BITS (12, 15)];
+
+ if (BIT (5))
+ op1 >>= 16;
+ if (BIT (6))
+ op2 >>= 16;
+ op1 &= 0xFFFF;
+ op2 &= 0xFFFF;
+ if (op1 & 0x8000)
+ op1 -= 65536;
+ if (op2 & 0x8000)
+ op2 -= 65536;
+ op1 *= op2;
+
+ if (AddOverflow (op1, Rn, op1 + Rn))
+ SETS;
+ state->Reg[BITS (16, 19)] = op1 + Rn;
+ break;
+ }
+
+ if (BITS (4, 11) == 5)
+ {
+ /* ElSegundo QADD insn. */
+ ARMword op1 = state->Reg[BITS (0, 3)];
+ ARMword op2 = state->Reg[BITS (16, 19)];
+ ARMword result = op1 + op2;
+ if (AddOverflow (op1, op2, result))
+ {
+ result = POS (result) ? 0x80000000 : 0x7fffffff;
+ SETS;
+ }
+ state->Reg[BITS (12, 15)] = result;
+ break;
+ }
+ }
#ifdef MODET
if (BITS (4, 11) == 0xB)
{
break;
case 0x12: /* TEQ reg and MSR reg to CPSR (ARM6) */
+ if (state->is_v5)
+ {
+ if (BITS (4, 7) == 3)
+ {
+ /* BLX(2) */
+ ARMword temp;
+
+ if (TFLAG)
+ temp = (pc + 2) | 1;
+ else
+ temp = pc + 4;
+
+ WriteR15Branch (state, state->Reg[RHSReg]);
+ state->Reg[14] = temp;
+ break;
+ }
+ }
+
+ if (state->is_v5e)
+ {
+ if (BIT (4) == 0 && BIT (7) == 1
+ && (BIT (5) == 0 || BITS (12, 15) == 0))
+ {
+ /* ElSegundo SMLAWy/SMULWy insn. */
+ unsigned long long op1 = state->Reg[BITS (0, 3)];
+ unsigned long long op2 = state->Reg[BITS (8, 11)];
+ unsigned long long result;
+
+ if (BIT (6))
+ op2 >>= 16;
+ if (op1 & 0x80000000)
+ op1 -= 1ULL << 32;
+ op2 &= 0xFFFF;
+ if (op2 & 0x8000)
+ op2 -= 65536;
+ result = (op1 * op2) >> 16;
+
+ if (BIT (5) == 0)
+ {
+ ARMword Rn = state->Reg[BITS (12, 15)];
+
+ if (AddOverflow (result, Rn, result + Rn))
+ SETS;
+ result += Rn;
+ }
+ state->Reg[BITS (16, 19)] = result;
+ break;
+ }
+
+ if (BITS (4, 11) == 5)
+ {
+ /* ElSegundo QSUB insn. */
+ ARMword op1 = state->Reg[BITS (0, 3)];
+ ARMword op2 = state->Reg[BITS (16, 19)];
+ ARMword result = op1 - op2;
+
+ if (SubOverflow (op1, op2, result))
+ {
+ result = POS (result) ? 0x80000000 : 0x7fffffff;
+ SETS;
+ }
+
+ state->Reg[BITS (12, 15)] = result;
+ break;
+ }
+ }
#ifdef MODET
if (BITS (4, 11) == 0xB)
{
SHPREDOWNWB ();
break;
}
-#endif
-#ifdef MODET
if (BITS (4, 27) == 0x12FFF1)
- { /* BX */
+ {
+ /* BX */
WriteR15Branch (state, state->Reg[RHSReg]);
break;
}
#endif
+ if (state->is_v5)
+ {
+ if (BITS (4, 7) == 0x7)
+ {
+ ARMword value;
+ extern int SWI_vector_installed;
+
+ /* Hardware is allowed to optionally override this
+ instruction and treat it as a breakpoint. Since
+ this is a simulator not hardware, we take the position
+ that if a SWI vector was not installed, then an Abort
+ vector was probably not installed either, and so
+ normally this instruction would be ignored, even if an
+ Abort is generated. This is a bad thing, since GDB
+ uses this instruction for its breakpoints (at least in
+ Thumb mode it does). So intercept the instruction here
+ and generate a breakpoint SWI instead. */
+ if (! SWI_vector_installed)
+ ARMul_OSHandleSWI (state, SWI_Breakpoint);
+ else
+
+ /* BKPT - normally this will cause an abort, but for the
+ XScale if bit 31 in register 10 of coprocessor 14 is
+ clear, then this is treated as a no-op. */
+ if (state->is_XScale)
+ {
+ if (read_cp14_reg (10) & (1UL << 31))
+ {
+ ARMword value;
+
+ value = read_cp14_reg (10);
+ value &= ~0x1c;
+ value |= 0xc;
+
+ write_cp14_reg (10, value);
+ write_cp15_reg (5, 0, 0, 0x200); /* Set FSR. */
+ write_cp15_reg (6, 0, 0, pc); /* Set FAR. */
+ }
+ else
+ break;
+ }
+
+ ARMul_Abort (state, ARMul_PrefetchAbortV);
+ break;
+ }
+ }
if (DESTReg == 15)
- { /* MSR reg to CPSR */
+ {
+ /* MSR reg to CPSR */
UNDEF_MSRPC;
temp = DPRegRHS;
+#ifdef MODET
+ /* Don't allow TBIT to be set by MSR. */
+ temp &= ~ TBIT;
+#endif
ARMul_FixCPSR (state, instr, temp);
}
else
break;
case 0x14: /* CMP reg and MRS SPSR and SWP byte */
+ if (state->is_v5e)
+ {
+ if (BIT (4) == 0 && BIT (7) == 1)
+ {
+ /* ElSegundo SMLALxy insn. */
+ unsigned long long op1 = state->Reg[BITS (0, 3)];
+ unsigned long long op2 = state->Reg[BITS (8, 11)];
+ unsigned long long dest;
+ unsigned long long result;
+
+ if (BIT (5))
+ op1 >>= 16;
+ if (BIT (6))
+ op2 >>= 16;
+ op1 &= 0xFFFF;
+ if (op1 & 0x8000)
+ op1 -= 65536;
+ op2 &= 0xFFFF;
+ if (op2 & 0x8000)
+ op2 -= 65536;
+
+ dest = (unsigned long long) state->Reg[BITS (16, 19)] << 32;
+ dest |= state->Reg[BITS (12, 15)];
+ dest += op1 * op2;
+ state->Reg[BITS (12, 15)] = dest;
+ state->Reg[BITS (16, 19)] = dest >> 32;
+ break;
+ }
+
+ if (BITS (4, 11) == 5)
+ {
+ /* ElSegundo QDADD insn. */
+ ARMword op1 = state->Reg[BITS (0, 3)];
+ ARMword op2 = state->Reg[BITS (16, 19)];
+ ARMword op2d = op2 + op2;
+ ARMword result;
+
+ if (AddOverflow (op2, op2, op2d))
+ {
+ SETS;
+ op2d = POS (op2d) ? 0x80000000 : 0x7fffffff;
+ }
+
+ result = op1 + op2d;
+ if (AddOverflow (op1, op2d, result))
+ {
+ SETS;
+ result = POS (result) ? 0x80000000 : 0x7fffffff;
+ }
+
+ state->Reg[BITS (12, 15)] = result;
+ break;
+ }
+ }
#ifdef MODET
if (BITS (4, 7) == 0xB)
{
break;
case 0x16: /* CMN reg and MSR reg to SPSR */
+ if (state->is_v5e)
+ {
+ if (BIT (4) == 0 && BIT (7) == 1 && BITS (12, 15) == 0)
+ {
+ /* ElSegundo SMULxy insn. */
+ ARMword op1 = state->Reg[BITS (0, 3)];
+ ARMword op2 = state->Reg[BITS (8, 11)];
+ ARMword Rn = state->Reg[BITS (12, 15)];
+
+ if (BIT (5))
+ op1 >>= 16;
+ if (BIT (6))
+ op2 >>= 16;
+ op1 &= 0xFFFF;
+ op2 &= 0xFFFF;
+ if (op1 & 0x8000)
+ op1 -= 65536;
+ if (op2 & 0x8000)
+ op2 -= 65536;
+
+ state->Reg[BITS (16, 19)] = op1 * op2;
+ break;
+ }
+
+ if (BITS (4, 11) == 5)
+ {
+ /* ElSegundo QDSUB insn. */
+ ARMword op1 = state->Reg[BITS (0, 3)];
+ ARMword op2 = state->Reg[BITS (16, 19)];
+ ARMword op2d = op2 + op2;
+ ARMword result;
+
+ if (AddOverflow (op2, op2, op2d))
+ {
+ SETS;
+ op2d = POS (op2d) ? 0x80000000 : 0x7fffffff;
+ }
+
+ result = op1 - op2d;
+ if (SubOverflow (op1, op2d, result))
+ {
+ SETS;
+ result = POS (result) ? 0x80000000 : 0x7fffffff;
+ }
+
+ state->Reg[BITS (12, 15)] = result;
+ break;
+ }
+ }
+
+ if (state->is_v5)
+ {
+ if (BITS (4, 11) == 0xF1 && BITS (16, 19) == 0xF)
+ {
+ /* ARM5 CLZ insn. */
+ ARMword op1 = state->Reg[BITS (0, 3)];
+ int result = 32;
+
+ if (op1)
+ for (result = 0; (op1 & 0x80000000) == 0; op1 <<= 1)
+ result++;
+
+ state->Reg[BITS (12, 15)] = result;
+ break;
+ }
+ }
#ifdef MODET
if (BITS (4, 7) == 0xB)
{
{
/* Check for the special breakpoint opcode.
This value should correspond to the value defined
- as ARM_BE_BREAKPOINT in gdb/arm-tdep.c. */
+ as ARM_BE_BREAKPOINT in gdb/arm/tm-arm.h. */
if (BITS (0, 19) == 0xfdefe)
{
if (!ARMul_OSHandleSWI (state, SWI_Breakpoint))
\***************************************************************************/
case 0xc4:
+ if (state->is_XScale)
+ {
+ if (BITS (4, 7) != 0x00)
+ ARMul_UndefInstr (state, instr);
+
+ if (BITS (8, 11) != 0x00)
+ ARMul_UndefInstr (state, instr); /* Not CP0. */
+
+ /* XScale MAR insn. Move two registers into accumulator. */
+ if (BITS (0, 3) == 0x00)
+ {
+ state->Accumulator = state->Reg[BITS (12, 15)];
+ state->Accumulator += (ARMdword) state->Reg[BITS (16, 19)] << 32;
+ break;
+ }
+ /* Access to any other acc is unpredicatable. */
+ break;
+ }
+ /* Drop through. */
+
case 0xc0: /* Store , No WriteBack , Post Dec */
ARMul_STC (state, instr, LHS);
break;
case 0xc5:
+ if (state->is_XScale)
+ {
+ if (BITS (4, 7) != 0x00)
+ ARMul_UndefInstr (state, instr);
+
+ if (BITS (8, 11) != 0x00)
+ ARMul_UndefInstr (state, instr); /* Not CP0. */
+
+ /* XScale MRA insn. Move accumulator into two registers. */
+ if (BITS (0, 3) == 0x00)
+ {
+ ARMword t1 = (state->Accumulator >> 32) & 255;
+
+ if (t1 & 128)
+ t1 -= 256;
+
+ state->Reg[BITS (12, 15)] = state->Accumulator;
+ state->Reg[BITS (16, 19)] = t1;
+ break;
+ }
+ /* Access to any other acc is unpredicatable. */
+ break;
+ }
+ /* Drop through. */
+
case 0xc1: /* Load , No WriteBack , Post Dec */
ARMul_LDC (state, instr, LHS);
break;
\***************************************************************************/
case 0xe2:
+ if (state->is_XScale)
+ switch (BITS (18, 19))
+ {
+ case 0x0:
+ {
+ /* XScale MIA instruction. Signed multiplication of two 32 bit
+ values and addition to 40 bit accumulator. */
+ long long Rm = state->Reg[MULLHSReg];
+ long long Rs = state->Reg[MULACCReg];
+
+ if (Rm & (1 << 31))
+ Rm -= 1ULL << 32;
+ if (Rs & (1 << 31))
+ Rs -= 1ULL << 32;
+ state->Accumulator += Rm * Rs;
+ }
+ goto donext;
+
+ case 0x2:
+ {
+ /* XScale MIAPH instruction. */
+ ARMword t1 = state->Reg[MULLHSReg] >> 16;
+ ARMword t2 = state->Reg[MULACCReg] >> 16;
+ ARMword t3 = state->Reg[MULLHSReg] & 0xffff;
+ ARMword t4 = state->Reg[MULACCReg] & 0xffff;
+ long long t5;
+
+ if (t1 & (1 << 15))
+ t1 -= 1 << 16;
+ if (t2 & (1 << 15))
+ t2 -= 1 << 16;
+ if (t3 & (1 << 15))
+ t3 -= 1 << 16;
+ if (t4 & (1 << 15))
+ t4 -= 1 << 16;
+ t1 *= t2;
+ t5 = t1;
+ if (t5 & (1 << 31))
+ t5 -= 1ULL << 32;
+ state->Accumulator += t5;
+ t3 *= t4;
+ t5 = t3;
+ if (t5 & (1 << 31))
+ t5 -= 1ULL << 32;
+ state->Accumulator += t5;
+ }
+ goto donext;
+
+ case 0x3:
+ {
+ /* XScale MIAxy instruction. */
+ ARMword t1;
+ ARMword t2;
+ long long t5;
+
+ if (BIT (17))
+ t1 = state->Reg[MULLHSReg] >> 16;
+ else
+ t1 = state->Reg[MULLHSReg] & 0xffff;
+
+ if (BIT (16))
+ t2 = state->Reg[MULACCReg] >> 16;
+ else
+ t2 = state->Reg[MULACCReg] & 0xffff;
+
+ if (t1 & (1 << 15))
+ t1 -= 1 << 16;
+ if (t2 & (1 << 15))
+ t2 -= 1 << 16;
+ t1 *= t2;
+ t5 = t1;
+ if (t5 & (1 << 31))
+ t5 -= 1ULL << 32;
+ state->Accumulator += t5;
+ }
+ goto donext;
+
+ default:
+ break;
+ }
+ /* Drop through. */
+
case 0xe0:
case 0xe4:
case 0xe6:
projects / binutils-gdb.git / commitdiff