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dpavlin |
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/* |
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* Copyright (C) 2005 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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dpavlin |
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* $Id: cpu_arm.c,v 1.29 2005/10/08 01:09:51 debug Exp $ |
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dpavlin |
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* |
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* ARM CPU emulation. |
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* |
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* A good source of quick info on ARM instruction encoding: |
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* |
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* http://www.pinknoise.demon.co.uk/ARMinstrs/ARMinstrs.html |
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* |
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* (Most "xxxx0101..." and similar strings in this file are from that URL, |
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* or from the ARM manual.) |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <ctype.h> |
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#include "arm_cpu_types.h" |
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#include "cpu.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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#include "symbol.h" |
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#define DYNTRANS_32 |
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#include "tmp_arm_head.c" |
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/* ARM symbolic register names and condition strings: */ |
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static char *arm_regname[N_ARM_REGS] = ARM_REG_NAMES; |
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static char *arm_condition_string[16] = ARM_CONDITION_STRINGS; |
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/* Data Processing Instructions: */ |
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static char *arm_dpiname[16] = ARM_DPI_NAMES; |
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static int arm_dpi_uses_d[16] = { 1,1,1,1,1,1,1,1,0,0,0,0,1,1,1,1 }; |
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static int arm_dpi_uses_n[16] = { 1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0 }; |
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/* Forward reference: */ |
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void arm_pc_to_pointers(struct cpu *cpu); |
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/* |
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* arm_cpu_new(): |
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* |
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* Create a new ARM cpu object by filling the CPU struct. |
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* Return 1 on success, 0 if cpu_type_name isn't a valid ARM processor. |
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*/ |
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int arm_cpu_new(struct cpu *cpu, struct memory *mem, |
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struct machine *machine, int cpu_id, char *cpu_type_name) |
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{ |
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int any_cache = 0, i, found; |
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struct arm_cpu_type_def cpu_type_defs[] = ARM_CPU_TYPE_DEFS; |
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/* Scan the list for this cpu type: */ |
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i = 0; found = -1; |
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while (i >= 0 && cpu_type_defs[i].name != NULL) { |
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if (strcasecmp(cpu_type_defs[i].name, cpu_type_name) == 0) { |
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found = i; |
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break; |
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} |
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i++; |
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} |
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if (found == -1) |
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return 0; |
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cpu->memory_rw = arm_memory_rw; |
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cpu->update_translation_table = arm_update_translation_table; |
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cpu->invalidate_translation_caches_paddr = |
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arm_invalidate_translation_caches_paddr; |
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cpu->invalidate_code_translation = arm_invalidate_code_translation; |
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cpu->translate_address = arm_translate_address; |
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cpu->cd.arm.cpu_type = cpu_type_defs[found]; |
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cpu->name = cpu->cd.arm.cpu_type.name; |
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cpu->is_32bit = 1; |
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cpu->cd.arm.cpsr = ARM_FLAG_I | ARM_FLAG_F; |
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cpu->cd.arm.control = ARM_CONTROL_PROG32 | ARM_CONTROL_DATA32 |
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| ARM_CONTROL_CACHE | ARM_CONTROL_ICACHE | ARM_CONTROL_ALIGN; |
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if (cpu->machine->prom_emulation) { |
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cpu->cd.arm.cpsr |= ARM_MODE_SVC32; |
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cpu->cd.arm.control |= ARM_CONTROL_S; |
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} else { |
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cpu->cd.arm.cpsr |= ARM_MODE_USR32; |
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cpu->cd.arm.control |= ARM_CONTROL_S | ARM_CONTROL_R; |
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} |
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/* Only show name and caches etc for CPU nr 0: */ |
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if (cpu_id == 0) { |
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debug("%s", cpu->name); |
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if (cpu->cd.arm.cpu_type.icache_shift != 0) |
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any_cache = 1; |
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if (cpu->cd.arm.cpu_type.dcache_shift != 0) |
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any_cache = 1; |
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if (any_cache) { |
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debug(" (I+D = %i+%i KB", |
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(int)(1 << (cpu->cd.arm.cpu_type.icache_shift-10)), |
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(int)(1 << (cpu->cd.arm.cpu_type.dcache_shift-10))); |
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debug(")"); |
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} |
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} |
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/* Coprocessor 15 = the system control coprocessor. */ |
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cpu->cd.arm.coproc[15] = arm_coproc_15; |
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/* |
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* NOTE/TODO: Ugly hack for OpenFirmware emulation: |
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*/ |
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if (cpu->machine->prom_emulation) { |
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cpu->cd.arm.of_emul_addr = cpu->machine->physical_ram_in_mb |
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* 1048576 - 8; |
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store_32bit_word(cpu, cpu->cd.arm.of_emul_addr, 0xef8c64be); |
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} |
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return 1; |
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} |
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/* |
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* arm_setup_initial_translation_table(): |
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* |
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* When booting kernels (such as OpenBSD or NetBSD) directly, it is assumed |
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* that the MMU is already enabled by the boot-loader. This function tries |
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* to emulate that. |
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*/ |
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void arm_setup_initial_translation_table(struct cpu *cpu, uint32_t ttb_addr) |
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{ |
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unsigned char nothing[16384]; |
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unsigned int i, j; |
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if (cpu->machine->userland_emul != NULL) { |
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fatal("arm_setup_initial_translation_table(): should not " |
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"be called for userland emulation!\n"); |
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exit(1); |
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} |
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cpu->cd.arm.control |= ARM_CONTROL_MMU; |
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cpu->cd.arm.dacr |= 0x00000003; |
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cpu->cd.arm.ttb = ttb_addr; |
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memset(nothing, 0, sizeof(nothing)); |
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cpu->memory_rw(cpu, cpu->mem, cpu->cd.arm.ttb, nothing, |
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sizeof(nothing), MEM_WRITE, PHYSICAL | NO_EXCEPTIONS); |
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for (i=0; i<256; i++) |
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for (j=0x0; j<=0xf; j++) { |
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unsigned char descr[4]; |
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uint32_t addr = cpu->cd.arm.ttb + |
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(((j << 28) + (i << 20)) >> 18); |
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uint32_t d = (1048576*i) | 0xc02; |
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/* |
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d = (1048576 * (i + (j==12? 10 : j)*256)) | 2; |
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*/ |
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if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
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descr[0] = d; descr[1] = d >> 8; |
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descr[2] = d >> 16; descr[3] = d >> 24; |
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} else { |
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descr[3] = d; descr[2] = d >> 8; |
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descr[1] = d >> 16; descr[0] = d >> 24; |
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} |
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cpu->memory_rw(cpu, cpu->mem, addr, &descr[0], |
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sizeof(descr), MEM_WRITE, PHYSICAL | NO_EXCEPTIONS); |
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} |
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} |
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/* |
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* arm_cpu_dumpinfo(): |
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*/ |
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void arm_cpu_dumpinfo(struct cpu *cpu) |
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{ |
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struct arm_cpu_type_def *ct = &cpu->cd.arm.cpu_type; |
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debug(" (I+D = %i+%i KB)\n", |
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(1 << ct->icache_shift) / 1024, (1 << ct->dcache_shift) / 1024); |
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} |
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/* |
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* arm_cpu_list_available_types(): |
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* |
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* Print a list of available ARM CPU types. |
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*/ |
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void arm_cpu_list_available_types(void) |
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{ |
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int i, j; |
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struct arm_cpu_type_def tdefs[] = ARM_CPU_TYPE_DEFS; |
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i = 0; |
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while (tdefs[i].name != NULL) { |
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debug("%s", tdefs[i].name); |
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for (j=13 - strlen(tdefs[i].name); j>0; j--) |
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debug(" "); |
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i++; |
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if ((i % 5) == 0 || tdefs[i].name == NULL) |
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debug("\n"); |
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} |
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} |
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/* |
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* arm_cpu_register_match(): |
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*/ |
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void arm_cpu_register_match(struct machine *m, char *name, |
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int writeflag, uint64_t *valuep, int *match_register) |
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{ |
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int i, cpunr = 0; |
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/* CPU number: */ |
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/* TODO */ |
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/* Register names: */ |
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for (i=0; i<N_ARM_REGS; i++) { |
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if (strcasecmp(name, arm_regname[i]) == 0) { |
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if (writeflag) { |
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m->cpus[cpunr]->cd.arm.r[i] = *valuep; |
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if (i == ARM_PC) |
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m->cpus[cpunr]->pc = *valuep; |
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} else |
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*valuep = m->cpus[cpunr]->cd.arm.r[i]; |
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*match_register = 1; |
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} |
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} |
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} |
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/* |
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* arm_cpu_register_dump(): |
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* |
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* Dump cpu registers in a relatively readable format. |
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* |
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* gprs: set to non-zero to dump GPRs and some special-purpose registers. |
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* coprocs: set bit 0..3 to dump registers in coproc 0..3. |
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*/ |
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void arm_cpu_register_dump(struct cpu *cpu, int gprs, int coprocs) |
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{ |
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char *symbol; |
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uint64_t offset; |
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int mode = cpu->cd.arm.cpsr & ARM_FLAG_MODE; |
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int i, x = cpu->cpu_id; |
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if (gprs) { |
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symbol = get_symbol_name(&cpu->machine->symbol_context, |
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cpu->cd.arm.r[ARM_PC], &offset); |
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debug("cpu%i: cpsr = ", x); |
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debug("%s%s%s%s%s%s", |
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(cpu->cd.arm.cpsr & ARM_FLAG_N)? "N" : "n", |
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(cpu->cd.arm.cpsr & ARM_FLAG_Z)? "Z" : "z", |
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(cpu->cd.arm.cpsr & ARM_FLAG_C)? "C" : "c", |
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(cpu->cd.arm.cpsr & ARM_FLAG_V)? "V" : "v", |
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(cpu->cd.arm.cpsr & ARM_FLAG_I)? "I" : "i", |
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(cpu->cd.arm.cpsr & ARM_FLAG_F)? "F" : "f"); |
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if (mode < ARM_MODE_USR32) |
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debug(" pc = 0x%07x", |
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(int)(cpu->cd.arm.r[ARM_PC] & 0x03ffffff)); |
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else |
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debug(" pc = 0x%08x", (int)cpu->cd.arm.r[ARM_PC]); |
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debug(" <%s>\n", symbol != NULL? symbol : " no symbol "); |
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for (i=0; i<N_ARM_REGS; i++) { |
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if ((i % 4) == 0) |
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debug("cpu%i:", x); |
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if (i != ARM_PC) |
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debug(" %s = 0x%08x", arm_regname[i], |
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(int)cpu->cd.arm.r[i]); |
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if ((i % 4) == 3) |
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debug("\n"); |
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} |
298 |
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} |
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if (coprocs & 1) { |
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int m = cpu->cd.arm.cpsr & ARM_FLAG_MODE; |
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debug("cpu%i: cpsr = 0x%08x (", x, cpu->cd.arm.cpsr); |
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switch (m) { |
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case ARM_MODE_USR32: |
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debug("USR32)\n"); break; |
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case ARM_MODE_SYS32: |
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debug("SYS32)\n"); break; |
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case ARM_MODE_FIQ32: |
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debug("FIQ32)\n"); break; |
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case ARM_MODE_IRQ32: |
311 |
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debug("IRQ32)\n"); break; |
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case ARM_MODE_SVC32: |
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debug("SVC32)\n"); break; |
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case ARM_MODE_ABT32: |
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debug("ABT32)\n"); break; |
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case ARM_MODE_UND32: |
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debug("UND32)\n"); break; |
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default:debug("unimplemented)\n"); |
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} |
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if (m != ARM_MODE_USR32 && m != ARM_MODE_SYS32) { |
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debug("cpu%i: usr r8..r14 =", x); |
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for (i=0; i<7; i++) |
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debug(" %08x", cpu->cd.arm.default_r8_r14[i]); |
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debug("\n"); |
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} |
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328 |
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if (m != ARM_MODE_FIQ32) { |
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debug("cpu%i: fiq r8..r14 =", x); |
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for (i=0; i<7; i++) |
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debug(" %08x", cpu->cd.arm.fiq_r8_r14[i]); |
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debug("\n"); |
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} |
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if (m != ARM_MODE_IRQ32) { |
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debug("cpu%i: irq r13..r14 =", x); |
337 |
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for (i=0; i<2; i++) |
338 |
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debug(" %08x", cpu->cd.arm.irq_r13_r14[i]); |
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debug("\n"); |
340 |
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} |
341 |
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342 |
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if (m != ARM_MODE_SVC32) { |
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debug("cpu%i: svc r13..r14 =", x); |
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for (i=0; i<2; i++) |
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debug(" %08x", cpu->cd.arm.svc_r13_r14[i]); |
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debug("\n"); |
347 |
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} |
348 |
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349 |
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if (m != ARM_MODE_ABT32) { |
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debug("cpu%i: abt r13..r14 =", x); |
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for (i=0; i<2; i++) |
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debug(" %08x", cpu->cd.arm.abt_r13_r14[i]); |
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debug("\n"); |
354 |
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} |
355 |
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356 |
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if (m != ARM_MODE_UND32) { |
357 |
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debug("cpu%i: und r13..r14 =", x); |
358 |
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for (i=0; i<2; i++) |
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debug(" %08x", cpu->cd.arm.und_r13_r14[i]); |
360 |
|
|
debug("\n"); |
361 |
|
|
} |
362 |
|
|
} |
363 |
|
|
|
364 |
|
|
if (coprocs & 2) { |
365 |
|
|
debug("cpu%i: control = 0x%08x\n", x, cpu->cd.arm.control); |
366 |
|
|
debug("cpu%i: MMU: %s\n", x, |
367 |
|
|
cpu->cd.arm.control & |
368 |
|
|
ARM_CONTROL_MMU? "enabled" : "disabled"); |
369 |
|
|
debug("cpu%i: alignment checks: %s\n", x, |
370 |
|
|
cpu->cd.arm.control & |
371 |
|
|
ARM_CONTROL_ALIGN? "enabled" : "disabled"); |
372 |
|
|
debug("cpu%i: [data] cache: %s\n", x, |
373 |
|
|
cpu->cd.arm.control & |
374 |
|
|
ARM_CONTROL_CACHE? "enabled" : "disabled"); |
375 |
|
|
debug("cpu%i: instruction cache: %s\n", x, |
376 |
|
|
cpu->cd.arm.control & |
377 |
|
|
ARM_CONTROL_ICACHE? "enabled" : "disabled"); |
378 |
|
|
debug("cpu%i: write buffer: %s\n", x, |
379 |
|
|
cpu->cd.arm.control & |
380 |
|
|
ARM_CONTROL_WBUFFER? "enabled" : "disabled"); |
381 |
|
|
debug("cpu%i: prog32: %s\n", x, |
382 |
|
|
cpu->cd.arm.control & |
383 |
|
|
ARM_CONTROL_PROG32? "yes" : "no (using prog26)"); |
384 |
|
|
debug("cpu%i: data32: %s\n", x, |
385 |
|
|
cpu->cd.arm.control & |
386 |
|
|
ARM_CONTROL_DATA32? "yes" : "no (using data26)"); |
387 |
|
|
debug("cpu%i: endianness: %s\n", x, |
388 |
|
|
cpu->cd.arm.control & |
389 |
|
|
ARM_CONTROL_BIG? "big endian" : "little endian"); |
390 |
|
|
debug("cpu%i: high vectors: %s\n", x, |
391 |
|
|
cpu->cd.arm.control & |
392 |
|
|
ARM_CONTROL_V? "yes (0xffff0000)" : "no"); |
393 |
|
|
|
394 |
|
|
debug("cpu%i: ttb = 0x%08x dacr = 0x%08x\n", x, |
395 |
|
|
cpu->cd.arm.ttb, cpu->cd.arm.dacr); |
396 |
|
|
debug("cpu%i: fsr = 0x%08x far = 0x%08x\n", x, |
397 |
|
|
cpu->cd.arm.fsr, cpu->cd.arm.far); |
398 |
|
|
} |
399 |
|
|
} |
400 |
|
|
|
401 |
|
|
|
402 |
|
|
/* |
403 |
|
|
* arm_cpu_show_full_statistics(): |
404 |
|
|
* |
405 |
|
|
* Show detailed statistics on opcode usage on each cpu. |
406 |
|
|
*/ |
407 |
|
|
void arm_cpu_show_full_statistics(struct machine *m) |
408 |
|
|
{ |
409 |
|
|
fatal("arm_cpu_show_full_statistics(): TODO\n"); |
410 |
|
|
} |
411 |
|
|
|
412 |
|
|
|
413 |
|
|
/* |
414 |
|
|
* arm_cpu_tlbdump(): |
415 |
|
|
* |
416 |
|
|
* Called from the debugger to dump the TLB in a readable format. |
417 |
|
|
* x is the cpu number to dump, or -1 to dump all CPUs. |
418 |
|
|
* |
419 |
|
|
* If rawflag is nonzero, then the TLB contents isn't formated nicely, |
420 |
|
|
* just dumped. |
421 |
|
|
*/ |
422 |
|
|
void arm_cpu_tlbdump(struct machine *m, int x, int rawflag) |
423 |
|
|
{ |
424 |
|
|
fatal("arm_cpu_tlbdump(): TODO\n"); |
425 |
|
|
} |
426 |
|
|
|
427 |
|
|
|
428 |
|
|
/* |
429 |
|
|
* arm_save_register_bank(): |
430 |
|
|
*/ |
431 |
|
|
void arm_save_register_bank(struct cpu *cpu) |
432 |
|
|
{ |
433 |
|
|
/* Save away current registers: */ |
434 |
|
|
switch (cpu->cd.arm.cpsr & ARM_FLAG_MODE) { |
435 |
|
|
case ARM_MODE_USR32: |
436 |
|
|
case ARM_MODE_SYS32: |
437 |
|
|
memcpy(cpu->cd.arm.default_r8_r14, |
438 |
|
|
&cpu->cd.arm.r[8], sizeof(uint32_t) * 7); |
439 |
|
|
break; |
440 |
|
|
case ARM_MODE_FIQ32: |
441 |
|
|
memcpy(cpu->cd.arm.fiq_r8_r14, |
442 |
|
|
&cpu->cd.arm.r[8], sizeof(uint32_t) * 7); |
443 |
|
|
break; |
444 |
|
|
case ARM_MODE_IRQ32: |
445 |
dpavlin |
16 |
memcpy(cpu->cd.arm.default_r8_r14, |
446 |
|
|
&cpu->cd.arm.r[8], sizeof(uint32_t) * 5); |
447 |
dpavlin |
14 |
cpu->cd.arm.irq_r13_r14[0] = cpu->cd.arm.r[13]; |
448 |
|
|
cpu->cd.arm.irq_r13_r14[1] = cpu->cd.arm.r[14]; |
449 |
|
|
break; |
450 |
|
|
case ARM_MODE_SVC32: |
451 |
dpavlin |
16 |
memcpy(cpu->cd.arm.default_r8_r14, |
452 |
|
|
&cpu->cd.arm.r[8], sizeof(uint32_t) * 5); |
453 |
dpavlin |
14 |
cpu->cd.arm.svc_r13_r14[0] = cpu->cd.arm.r[13]; |
454 |
|
|
cpu->cd.arm.svc_r13_r14[1] = cpu->cd.arm.r[14]; |
455 |
|
|
break; |
456 |
|
|
case ARM_MODE_ABT32: |
457 |
dpavlin |
16 |
memcpy(cpu->cd.arm.default_r8_r14, |
458 |
|
|
&cpu->cd.arm.r[8], sizeof(uint32_t) * 5); |
459 |
dpavlin |
14 |
cpu->cd.arm.abt_r13_r14[0] = cpu->cd.arm.r[13]; |
460 |
|
|
cpu->cd.arm.abt_r13_r14[1] = cpu->cd.arm.r[14]; |
461 |
|
|
break; |
462 |
|
|
case ARM_MODE_UND32: |
463 |
dpavlin |
16 |
memcpy(cpu->cd.arm.default_r8_r14, |
464 |
|
|
&cpu->cd.arm.r[8], sizeof(uint32_t) * 5); |
465 |
dpavlin |
14 |
cpu->cd.arm.und_r13_r14[0] = cpu->cd.arm.r[13]; |
466 |
|
|
cpu->cd.arm.und_r13_r14[1] = cpu->cd.arm.r[14]; |
467 |
|
|
break; |
468 |
|
|
default:fatal("arm_save_register_bank: unimplemented mode %i\n", |
469 |
|
|
cpu->cd.arm.cpsr & ARM_FLAG_MODE); |
470 |
|
|
exit(1); |
471 |
|
|
} |
472 |
|
|
} |
473 |
|
|
|
474 |
|
|
|
475 |
|
|
/* |
476 |
|
|
* arm_load_register_bank(): |
477 |
|
|
*/ |
478 |
|
|
void arm_load_register_bank(struct cpu *cpu) |
479 |
|
|
{ |
480 |
|
|
/* Load new registers: */ |
481 |
|
|
switch (cpu->cd.arm.cpsr & ARM_FLAG_MODE) { |
482 |
|
|
case ARM_MODE_USR32: |
483 |
|
|
case ARM_MODE_SYS32: |
484 |
|
|
memcpy(&cpu->cd.arm.r[8], |
485 |
|
|
cpu->cd.arm.default_r8_r14, sizeof(uint32_t) * 7); |
486 |
|
|
break; |
487 |
|
|
case ARM_MODE_FIQ32: |
488 |
|
|
memcpy(&cpu->cd.arm.r[8], cpu->cd.arm.fiq_r8_r14, |
489 |
|
|
sizeof(uint32_t) * 7); |
490 |
|
|
break; |
491 |
|
|
case ARM_MODE_IRQ32: |
492 |
dpavlin |
16 |
memcpy(&cpu->cd.arm.r[8], |
493 |
|
|
cpu->cd.arm.default_r8_r14, sizeof(uint32_t) * 5); |
494 |
dpavlin |
14 |
cpu->cd.arm.r[13] = cpu->cd.arm.irq_r13_r14[0]; |
495 |
|
|
cpu->cd.arm.r[14] = cpu->cd.arm.irq_r13_r14[1]; |
496 |
|
|
break; |
497 |
|
|
case ARM_MODE_SVC32: |
498 |
dpavlin |
16 |
memcpy(&cpu->cd.arm.r[8], |
499 |
|
|
cpu->cd.arm.default_r8_r14, sizeof(uint32_t) * 5); |
500 |
dpavlin |
14 |
cpu->cd.arm.r[13] = cpu->cd.arm.svc_r13_r14[0]; |
501 |
|
|
cpu->cd.arm.r[14] = cpu->cd.arm.svc_r13_r14[1]; |
502 |
|
|
break; |
503 |
|
|
case ARM_MODE_ABT32: |
504 |
dpavlin |
16 |
memcpy(&cpu->cd.arm.r[8], |
505 |
|
|
cpu->cd.arm.default_r8_r14, sizeof(uint32_t) * 5); |
506 |
dpavlin |
14 |
cpu->cd.arm.r[13] = cpu->cd.arm.abt_r13_r14[0]; |
507 |
|
|
cpu->cd.arm.r[14] = cpu->cd.arm.abt_r13_r14[1]; |
508 |
|
|
break; |
509 |
|
|
case ARM_MODE_UND32: |
510 |
dpavlin |
16 |
memcpy(&cpu->cd.arm.r[8], |
511 |
|
|
cpu->cd.arm.default_r8_r14, sizeof(uint32_t) * 5); |
512 |
dpavlin |
14 |
cpu->cd.arm.r[13] = cpu->cd.arm.und_r13_r14[0]; |
513 |
|
|
cpu->cd.arm.r[14] = cpu->cd.arm.und_r13_r14[1]; |
514 |
|
|
break; |
515 |
|
|
default:fatal("arm_load_register_bank: unimplemented mode %i\n", |
516 |
|
|
cpu->cd.arm.cpsr & ARM_FLAG_MODE); |
517 |
|
|
exit(1); |
518 |
|
|
} |
519 |
|
|
} |
520 |
|
|
|
521 |
|
|
|
522 |
|
|
/* |
523 |
|
|
* arm_exception(): |
524 |
|
|
*/ |
525 |
|
|
void arm_exception(struct cpu *cpu, int exception_nr) |
526 |
|
|
{ |
527 |
|
|
int arm_exception_to_mode[N_ARM_EXCEPTIONS] = ARM_EXCEPTION_TO_MODE; |
528 |
|
|
int oldmode, newmode; |
529 |
|
|
uint32_t retaddr; |
530 |
|
|
|
531 |
|
|
if (exception_nr < 0 || exception_nr >= N_ARM_EXCEPTIONS) { |
532 |
|
|
fatal("arm_exception(): exception_nr = %i\n", exception_nr); |
533 |
|
|
exit(1); |
534 |
|
|
} |
535 |
|
|
|
536 |
|
|
retaddr = cpu->pc; |
537 |
|
|
|
538 |
|
|
debug("[ arm_exception(): "); |
539 |
|
|
|
540 |
|
|
switch (exception_nr) { |
541 |
|
|
case ARM_EXCEPTION_RESET: |
542 |
|
|
cpu->running = 0; |
543 |
|
|
fatal("RESET: TODO"); |
544 |
|
|
exit(1); |
545 |
|
|
case ARM_EXCEPTION_UND: |
546 |
|
|
debug("UNDEFINED"); |
547 |
|
|
retaddr += 4; |
548 |
|
|
break; |
549 |
|
|
case ARM_EXCEPTION_SWI: |
550 |
|
|
debug("SWI"); |
551 |
|
|
retaddr += 4; |
552 |
|
|
break; |
553 |
|
|
case ARM_EXCEPTION_PREF_ABT: |
554 |
|
|
debug("PREFETCH ABORT"); |
555 |
|
|
retaddr += 4; |
556 |
|
|
break; |
557 |
|
|
case ARM_EXCEPTION_IRQ: |
558 |
|
|
debug("IRQ"); |
559 |
|
|
retaddr += 4; |
560 |
|
|
break; |
561 |
|
|
case ARM_EXCEPTION_FIQ: |
562 |
|
|
debug("FIQ"); |
563 |
|
|
retaddr += 4; |
564 |
|
|
break; |
565 |
|
|
case ARM_EXCEPTION_DATA_ABT: |
566 |
|
|
debug("DATA ABORT, far=0x%08x fsr=0x%02x", |
567 |
|
|
cpu->cd.arm.far, cpu->cd.arm.fsr); |
568 |
|
|
retaddr += 8; |
569 |
|
|
break; |
570 |
|
|
} |
571 |
|
|
|
572 |
|
|
debug(" ]\n"); |
573 |
|
|
|
574 |
|
|
arm_save_register_bank(cpu); |
575 |
|
|
|
576 |
|
|
switch (arm_exception_to_mode[exception_nr]) { |
577 |
|
|
case ARM_MODE_SVC32: |
578 |
|
|
cpu->cd.arm.spsr_svc = cpu->cd.arm.cpsr; break; |
579 |
|
|
case ARM_MODE_ABT32: |
580 |
|
|
cpu->cd.arm.spsr_abt = cpu->cd.arm.cpsr; break; |
581 |
|
|
case ARM_MODE_UND32: |
582 |
|
|
cpu->cd.arm.spsr_und = cpu->cd.arm.cpsr; break; |
583 |
|
|
case ARM_MODE_IRQ32: |
584 |
|
|
cpu->cd.arm.spsr_irq = cpu->cd.arm.cpsr; break; |
585 |
|
|
case ARM_MODE_FIQ32: |
586 |
|
|
cpu->cd.arm.spsr_fiq = cpu->cd.arm.cpsr; break; |
587 |
|
|
default:fatal("arm_exception(): unimplemented exception nr\n"); |
588 |
|
|
exit(1); |
589 |
|
|
} |
590 |
|
|
|
591 |
|
|
/* |
592 |
|
|
* Disable Thumb mode (because exception handlers always execute |
593 |
|
|
* in ARM mode), set the exception mode, and disable interrupts: |
594 |
|
|
*/ |
595 |
|
|
cpu->cd.arm.cpsr &= ~ARM_FLAG_T; |
596 |
|
|
|
597 |
|
|
oldmode = cpu->cd.arm.cpsr & ARM_FLAG_MODE; |
598 |
|
|
|
599 |
|
|
cpu->cd.arm.cpsr &= ~ARM_FLAG_MODE; |
600 |
|
|
cpu->cd.arm.cpsr |= arm_exception_to_mode[exception_nr]; |
601 |
|
|
|
602 |
|
|
newmode = cpu->cd.arm.cpsr & ARM_FLAG_MODE; |
603 |
|
|
if (oldmode == newmode) { |
604 |
|
|
fatal("Exception caused no mode change? TODO\n"); |
605 |
|
|
exit(1); |
606 |
|
|
} |
607 |
|
|
|
608 |
|
|
cpu->cd.arm.cpsr |= ARM_FLAG_I; |
609 |
|
|
if (exception_nr == ARM_EXCEPTION_RESET || |
610 |
|
|
exception_nr == ARM_EXCEPTION_FIQ) |
611 |
|
|
cpu->cd.arm.cpsr |= ARM_FLAG_F; |
612 |
|
|
|
613 |
|
|
/* Load the new register bank, if we switched: */ |
614 |
|
|
arm_load_register_bank(cpu); |
615 |
|
|
|
616 |
|
|
/* Set the return address and new PC: */ |
617 |
|
|
cpu->cd.arm.r[ARM_LR] = retaddr; |
618 |
|
|
|
619 |
|
|
cpu->pc = cpu->cd.arm.r[ARM_PC] = exception_nr * 4 + |
620 |
|
|
((cpu->cd.arm.control & ARM_CONTROL_V)? 0xffff0000 : 0); |
621 |
|
|
arm_pc_to_pointers(cpu); |
622 |
|
|
} |
623 |
|
|
|
624 |
|
|
|
625 |
|
|
/* |
626 |
|
|
* arm_cpu_interrupt(): |
627 |
|
|
* |
628 |
|
|
* 0..31 are used as footbridge interrupt numbers, 32..47 = ISA, |
629 |
|
|
* 64 is used as a "re-assert" signal to cpu->machine->md_interrupt(). |
630 |
|
|
* |
631 |
|
|
* TODO: don't hardcode to footbridge! |
632 |
|
|
*/ |
633 |
|
|
int arm_cpu_interrupt(struct cpu *cpu, uint64_t irq_nr) |
634 |
|
|
{ |
635 |
|
|
/* fatal("arm_cpu_interrupt(): 0x%llx\n", (int)irq_nr); */ |
636 |
|
|
if (irq_nr <= 64) { |
637 |
|
|
if (cpu->machine->md_interrupt != NULL) |
638 |
|
|
cpu->machine->md_interrupt(cpu->machine, |
639 |
|
|
cpu, irq_nr, 1); |
640 |
|
|
else |
641 |
|
|
fatal("arm_cpu_interrupt(): md_interrupt == NULL\n"); |
642 |
|
|
} else { |
643 |
|
|
/* Assert ARM IRQs: */ |
644 |
|
|
cpu->cd.arm.irq_asserted = 1; |
645 |
|
|
} |
646 |
|
|
|
647 |
|
|
return 1; |
648 |
|
|
} |
649 |
|
|
|
650 |
|
|
|
651 |
|
|
/* |
652 |
|
|
* arm_cpu_interrupt_ack(): |
653 |
|
|
*/ |
654 |
|
|
int arm_cpu_interrupt_ack(struct cpu *cpu, uint64_t irq_nr) |
655 |
|
|
{ |
656 |
|
|
if (irq_nr <= 64) { |
657 |
|
|
if (cpu->machine->md_interrupt != NULL) |
658 |
|
|
cpu->machine->md_interrupt(cpu->machine, |
659 |
|
|
cpu, irq_nr, 0); |
660 |
|
|
} else { |
661 |
|
|
/* De-assert ARM IRQs: */ |
662 |
|
|
cpu->cd.arm.irq_asserted = 0; |
663 |
|
|
} |
664 |
|
|
|
665 |
|
|
return 1; |
666 |
|
|
} |
667 |
|
|
|
668 |
|
|
|
669 |
|
|
/* |
670 |
|
|
* arm_cpu_disassemble_instr(): |
671 |
|
|
* |
672 |
|
|
* Convert an instruction word into human readable format, for instruction |
673 |
|
|
* tracing. |
674 |
|
|
* |
675 |
|
|
* If running is 1, cpu->pc should be the address of the instruction. |
676 |
|
|
* |
677 |
|
|
* If running is 0, things that depend on the runtime environment (eg. |
678 |
|
|
* register contents) will not be shown, and addr will be used instead of |
679 |
|
|
* cpu->pc for relative addresses. |
680 |
|
|
*/ |
681 |
|
|
int arm_cpu_disassemble_instr(struct cpu *cpu, unsigned char *ib, |
682 |
|
|
int running, uint64_t dumpaddr, int bintrans) |
683 |
|
|
{ |
684 |
|
|
uint32_t iw, tmp; |
685 |
|
|
int main_opcode, secondary_opcode, s_bit, r16, r12, r8; |
686 |
|
|
int i, n, p_bit, u_bit, b_bit, w_bit, l_bit; |
687 |
|
|
char *symbol, *condition; |
688 |
|
|
uint64_t offset; |
689 |
|
|
|
690 |
|
|
if (running) |
691 |
|
|
dumpaddr = cpu->pc; |
692 |
|
|
|
693 |
|
|
symbol = get_symbol_name(&cpu->machine->symbol_context, |
694 |
|
|
dumpaddr, &offset); |
695 |
|
|
if (symbol != NULL && offset == 0) |
696 |
|
|
debug("<%s>\n", symbol); |
697 |
|
|
|
698 |
|
|
if (cpu->machine->ncpus > 1 && running) |
699 |
|
|
debug("cpu%i:\t", cpu->cpu_id); |
700 |
|
|
|
701 |
|
|
debug("%08x: ", (int)dumpaddr); |
702 |
|
|
|
703 |
|
|
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) |
704 |
|
|
iw = ib[0] + (ib[1]<<8) + (ib[2]<<16) + (ib[3]<<24); |
705 |
|
|
else |
706 |
|
|
iw = ib[3] + (ib[2]<<8) + (ib[1]<<16) + (ib[0]<<24); |
707 |
|
|
debug("%08x\t", (int)iw); |
708 |
|
|
|
709 |
|
|
condition = arm_condition_string[iw >> 28]; |
710 |
|
|
main_opcode = (iw >> 24) & 15; |
711 |
|
|
secondary_opcode = (iw >> 21) & 15; |
712 |
|
|
u_bit = (iw >> 23) & 1; |
713 |
|
|
b_bit = (iw >> 22) & 1; |
714 |
|
|
w_bit = (iw >> 21) & 1; |
715 |
|
|
s_bit = l_bit = (iw >> 20) & 1; |
716 |
|
|
r16 = (iw >> 16) & 15; |
717 |
|
|
r12 = (iw >> 12) & 15; |
718 |
|
|
r8 = (iw >> 8) & 15; |
719 |
|
|
|
720 |
|
|
switch (main_opcode) { |
721 |
|
|
case 0x0: |
722 |
|
|
case 0x1: |
723 |
|
|
case 0x2: |
724 |
|
|
case 0x3: |
725 |
|
|
/* |
726 |
|
|
* Special cases first: |
727 |
|
|
*/ |
728 |
|
|
|
729 |
|
|
/* |
730 |
|
|
* Multiplication: |
731 |
|
|
* xxxx0000 00ASdddd nnnnssss 1001mmmm (Rd, Rm, Rs [,Rn]) |
732 |
|
|
*/ |
733 |
|
|
if ((iw & 0x0fc000f0) == 0x00000090) { |
734 |
|
|
int a_bit = (iw >> 21) & 1; |
735 |
|
|
debug("%s%s%s\t", a_bit? "mla" : "mul", |
736 |
|
|
condition, s_bit? "s" : ""); |
737 |
|
|
debug("%s,", arm_regname[r16]); |
738 |
|
|
debug("%s,", arm_regname[iw & 15]); |
739 |
|
|
debug("%s", arm_regname[r8]); |
740 |
|
|
if (a_bit) |
741 |
|
|
debug(",%s", arm_regname[r12]); |
742 |
|
|
debug("\n"); |
743 |
|
|
break; |
744 |
|
|
} |
745 |
|
|
|
746 |
|
|
/* |
747 |
|
|
* Long multiplication: |
748 |
|
|
* xxxx0000 1UAShhhh llllssss 1001mmmm (Rl,Rh,Rm,Rs) |
749 |
|
|
*/ |
750 |
|
|
if ((iw & 0x0f8000f0) == 0x00800090) { |
751 |
|
|
int u_bit = (iw >> 22) & 1; |
752 |
|
|
int a_bit = (iw >> 21) & 1; |
753 |
|
|
debug("%s%sl%s%s\t", u_bit? "s" : "u", |
754 |
|
|
a_bit? "mla" : "mul", condition, s_bit? "s" : ""); |
755 |
|
|
debug("%s,", arm_regname[r12]); |
756 |
|
|
debug("%s,", arm_regname[r16]); |
757 |
|
|
debug("%s,", arm_regname[iw & 15]); |
758 |
|
|
debug("%s\n", arm_regname[r8]); |
759 |
|
|
break; |
760 |
|
|
} |
761 |
|
|
|
762 |
|
|
/* |
763 |
|
|
* xxxx0001 0010.... ........ 00L1mmmm bx/blx rm |
764 |
|
|
*/ |
765 |
|
|
if ((iw & 0x0ff000d0) == 0x01200010) { |
766 |
|
|
int l_bit = iw & 0x20; |
767 |
|
|
debug("b%sx%s\t%s\n", l_bit? "l" : "", condition, |
768 |
|
|
arm_regname[iw & 15]); |
769 |
|
|
break; |
770 |
|
|
} |
771 |
|
|
|
772 |
|
|
/* |
773 |
|
|
* xxxx0001 0s10aaaa 11110000 0000mmmm MSR Regform |
774 |
|
|
* xxxx0011 0s10aaaa 1111rrrr bbbbbbbb MSR Immform |
775 |
|
|
* xxxx0001 0s001111 dddd0000 00000000 MRS |
776 |
|
|
*/ |
777 |
|
|
if ((iw & 0x0fb0fff0) == 0x0120f000 || |
778 |
|
|
(iw & 0x0fb0f000) == 0x0320f000) { |
779 |
|
|
int a = (iw >> 16) & 15; |
780 |
|
|
debug("msr%s\t%s", condition, (iw&0x400000)? "S":"C"); |
781 |
|
|
debug("PSR_"); |
782 |
|
|
switch (a) { |
783 |
|
|
case 1: debug("ctl"); break; |
784 |
|
|
case 8: debug("flg"); break; |
785 |
|
|
case 9: debug("all"); break; |
786 |
|
|
default:debug(" UNIMPLEMENTED (a=%i)", a); |
787 |
|
|
} |
788 |
|
|
if (iw & 0x02000000) { |
789 |
|
|
int r = (iw >> 7) & 30; |
790 |
|
|
uint32_t b = iw & 0xff; |
791 |
|
|
while (r-- > 0) |
792 |
|
|
b = (b >> 1) | ((b & 1) << 31); |
793 |
|
|
debug(",#0x%x\n", b); |
794 |
|
|
} else |
795 |
|
|
debug(",%s\n", arm_regname[iw & 15]); |
796 |
|
|
break; |
797 |
|
|
} |
798 |
|
|
if ((iw & 0x0fbf0fff) == 0x010f0000) { |
799 |
|
|
debug("mrs%s\t", condition); |
800 |
|
|
debug("%s,%sPSR\n", arm_regname[r12], |
801 |
|
|
(iw&0x400000)? "S":"C"); |
802 |
|
|
break; |
803 |
|
|
} |
804 |
|
|
|
805 |
|
|
/* |
806 |
|
|
* xxxx0001 0B00nnnn dddd0000 1001mmmm SWP Rd,Rm,[Rn] |
807 |
|
|
*/ |
808 |
|
|
if ((iw & 0x0fb00ff0) == 0x01000090) { |
809 |
|
|
debug("swp%s%s\t", condition, (iw&0x400000)? "b":""); |
810 |
|
|
debug("%s,%s,[%s]\n", arm_regname[r12], |
811 |
|
|
arm_regname[iw & 15], arm_regname[r16]); |
812 |
|
|
break; |
813 |
|
|
} |
814 |
|
|
|
815 |
|
|
/* |
816 |
|
|
* xxxx000P U1WLnnnn ddddHHHH 1SH1LLLL load/store rd,imm(rn) |
817 |
|
|
*/ |
818 |
|
|
if ((iw & 0x0e000090) == 0x00000090) { |
819 |
|
|
int imm = ((iw >> 4) & 0xf0) | (iw & 0xf); |
820 |
|
|
int regform = !(iw & 0x00400000); |
821 |
|
|
p_bit = main_opcode & 1; |
822 |
|
|
/* |
823 |
|
|
* TODO: detect some illegal variants: |
824 |
|
|
* signed store, or unsigned byte load/store |
825 |
|
|
*/ |
826 |
|
|
if (!l_bit && (iw & 0xd0) == 0xd0 && (r12 & 1)) { |
827 |
|
|
debug("TODO: r12 odd, not load/store\n"); |
828 |
|
|
break; |
829 |
|
|
} |
830 |
|
|
/* Semi-generic case: */ |
831 |
|
|
debug("%sr%s", iw & 0x00100000? "ld" : "st", |
832 |
|
|
condition); |
833 |
|
|
if (!l_bit && (iw & 0xd0) == 0xd0) { |
834 |
|
|
debug("d"); /* Double-register */ |
835 |
|
|
} else { |
836 |
|
|
if (iw & 0x40) |
837 |
|
|
debug("s"); /* signed */ |
838 |
|
|
if (iw & 0x20) |
839 |
|
|
debug("h"); /* half-word */ |
840 |
|
|
else |
841 |
|
|
debug("b"); /* byte */ |
842 |
|
|
} |
843 |
|
|
debug("\t%s,[%s", arm_regname[r12], arm_regname[r16]); |
844 |
|
|
if (p_bit) { |
845 |
|
|
/* Pre-index: */ |
846 |
|
|
if (regform) |
847 |
|
|
debug(",%s%s", u_bit? "" : "-", |
848 |
|
|
arm_regname[iw & 15]); |
849 |
|
|
else { |
850 |
|
|
if (imm != 0) |
851 |
|
|
debug(",#%s%i", u_bit? "" : "-", |
852 |
|
|
imm); |
853 |
|
|
} |
854 |
|
|
debug("]%s\n", w_bit? "!" : ""); |
855 |
|
|
} else { |
856 |
|
|
/* Post-index: */ |
857 |
|
|
debug("],"); |
858 |
|
|
if (regform) |
859 |
|
|
debug("%s%s\n", u_bit? "" : "-", |
860 |
|
|
arm_regname[iw & 15]); |
861 |
|
|
else |
862 |
|
|
debug("#%s%i\n", u_bit? "" : "-", imm); |
863 |
|
|
} |
864 |
|
|
break; |
865 |
|
|
} |
866 |
|
|
|
867 |
|
|
/* Other special cases: */ |
868 |
|
|
if (iw & 0x80 && !(main_opcode & 2) && iw & 0x10) { |
869 |
|
|
debug("UNIMPLEMENTED reg (c!=0), t odd\n"); |
870 |
|
|
break; |
871 |
|
|
} |
872 |
|
|
|
873 |
|
|
/* |
874 |
|
|
* Generic Data Processing Instructions: |
875 |
|
|
* |
876 |
|
|
* xxxx000a aaaSnnnn ddddcccc ctttmmmm Register form |
877 |
|
|
* xxxx001a aaaSnnnn ddddrrrr bbbbbbbb Immediate form |
878 |
|
|
*/ |
879 |
|
|
|
880 |
|
|
debug("%s%s%s\t", arm_dpiname[secondary_opcode], |
881 |
|
|
condition, s_bit? "s" : ""); |
882 |
|
|
if (arm_dpi_uses_d[secondary_opcode]) |
883 |
|
|
debug("%s,", arm_regname[r12]); |
884 |
|
|
if (arm_dpi_uses_n[secondary_opcode]) |
885 |
|
|
debug("%s,", arm_regname[r16]); |
886 |
|
|
|
887 |
|
|
if (main_opcode & 2) { |
888 |
|
|
/* Immediate form: */ |
889 |
|
|
int r = (iw >> 7) & 30; |
890 |
|
|
uint32_t b = iw & 0xff; |
891 |
|
|
while (r-- > 0) |
892 |
|
|
b = (b >> 1) | ((b & 1) << 31); |
893 |
|
|
if (b < 15) |
894 |
|
|
debug("#%i", b); |
895 |
|
|
else |
896 |
|
|
debug("#0x%x", b); |
897 |
|
|
} else { |
898 |
|
|
/* Register form: */ |
899 |
|
|
int t = (iw >> 4) & 7; |
900 |
|
|
int c = (iw >> 7) & 31; |
901 |
|
|
debug("%s", arm_regname[iw & 15]); |
902 |
|
|
switch (t) { |
903 |
|
|
case 0: if (c != 0) |
904 |
|
|
debug(", lsl #%i", c); |
905 |
|
|
break; |
906 |
|
|
case 1: debug(", lsl %s", arm_regname[c >> 1]); |
907 |
|
|
break; |
908 |
|
|
case 2: debug(", lsr #%i", c? c : 32); |
909 |
|
|
break; |
910 |
|
|
case 3: debug(", lsr %s", arm_regname[c >> 1]); |
911 |
|
|
break; |
912 |
|
|
case 4: debug(", asr #%i", c? c : 32); |
913 |
|
|
break; |
914 |
|
|
case 5: debug(", asr %s", arm_regname[c >> 1]); |
915 |
|
|
break; |
916 |
|
|
case 6: if (c != 0) |
917 |
|
|
debug(", ror #%i", c); |
918 |
|
|
else |
919 |
|
|
debug(", rrx"); |
920 |
|
|
break; |
921 |
|
|
case 7: debug(", ror %s", arm_regname[c >> 1]); |
922 |
|
|
break; |
923 |
|
|
} |
924 |
|
|
|
925 |
|
|
/* mov pc,reg: */ |
926 |
|
|
if (running && t == 0 && c == 0 && secondary_opcode |
927 |
|
|
== 0xd && r12 == ARM_PC && (iw&15)!=ARM_PC) { |
928 |
|
|
symbol = get_symbol_name(&cpu->machine-> |
929 |
|
|
symbol_context, cpu->cd.arm.r[iw & 15], |
930 |
|
|
&offset); |
931 |
|
|
if (symbol != NULL) |
932 |
|
|
debug(" \t<%s>", symbol); |
933 |
|
|
} |
934 |
|
|
} |
935 |
|
|
debug("\n"); |
936 |
|
|
break; |
937 |
|
|
case 0x4: /* Single Data Transfer */ |
938 |
|
|
case 0x5: |
939 |
|
|
case 0x6: |
940 |
|
|
case 0x7: |
941 |
|
|
/* Special case first: */ |
942 |
|
|
if ((iw & 0xfc70f000) == 0xf450f000) { |
943 |
|
|
/* Preload: */ |
944 |
|
|
debug("pld\t[%s]\n", arm_regname[r16]); |
945 |
|
|
break; |
946 |
|
|
} |
947 |
|
|
|
948 |
|
|
/* |
949 |
|
|
* xxxx010P UBWLnnnn ddddoooo oooooooo Immediate form |
950 |
|
|
* xxxx011P UBWLnnnn ddddcccc ctt0mmmm Register form |
951 |
|
|
*/ |
952 |
|
|
p_bit = main_opcode & 1; |
953 |
|
|
if (main_opcode >= 6 && iw & 0x10) { |
954 |
|
|
debug("TODO: single data transf. but 0x10\n"); |
955 |
|
|
break; |
956 |
|
|
} |
957 |
|
|
debug("%s%s%s", l_bit? "ldr" : "str", |
958 |
|
|
condition, b_bit? "b" : ""); |
959 |
|
|
if (!p_bit && w_bit) |
960 |
|
|
debug("t"); |
961 |
|
|
debug("\t%s,[%s", arm_regname[r12], arm_regname[r16]); |
962 |
|
|
if ((iw & 0x0e000000) == 0x04000000) { |
963 |
|
|
/* Immediate form: */ |
964 |
|
|
uint32_t imm = iw & 0xfff; |
965 |
|
|
if (!p_bit) |
966 |
|
|
debug("]"); |
967 |
|
|
if (imm != 0) |
968 |
|
|
debug(",#%s%i", u_bit? "" : "-", imm); |
969 |
|
|
if (p_bit) |
970 |
|
|
debug("]"); |
971 |
|
|
} else if ((iw & 0x0e000010) == 0x06000000) { |
972 |
|
|
/* Register form: */ |
973 |
|
|
if (!p_bit) |
974 |
|
|
debug("]"); |
975 |
|
|
if ((iw & 0xfff) != 0) |
976 |
|
|
debug(",%s%s", u_bit? "" : "-", |
977 |
|
|
arm_regname[iw & 15]); |
978 |
|
|
if ((iw & 0xff0) != 0x000) { |
979 |
|
|
int c = (iw >> 7) & 31; |
980 |
|
|
int t = (iw >> 4) & 7; |
981 |
|
|
switch (t) { |
982 |
|
|
case 0: if (c != 0) |
983 |
|
|
debug(", lsl #%i", c); |
984 |
|
|
break; |
985 |
|
|
case 2: debug(", lsr #%i", c? c : 32); |
986 |
|
|
break; |
987 |
|
|
case 4: debug(", asr #%i", c? c : 32); |
988 |
|
|
break; |
989 |
|
|
case 6: if (c != 0) |
990 |
|
|
debug(", ror #%i", c); |
991 |
|
|
else |
992 |
|
|
debug(", rrx"); |
993 |
|
|
break; |
994 |
|
|
} |
995 |
|
|
} |
996 |
|
|
if (p_bit) |
997 |
|
|
debug("]"); |
998 |
|
|
} else { |
999 |
|
|
debug("UNKNOWN\n"); |
1000 |
|
|
break; |
1001 |
|
|
} |
1002 |
|
|
debug("%s", (p_bit && w_bit)? "!" : ""); |
1003 |
|
|
if ((iw & 0x0f000000) == 0x05000000 && |
1004 |
|
|
(r16 == ARM_PC || running)) { |
1005 |
|
|
unsigned char tmpw[4]; |
1006 |
|
|
uint32_t imm = iw & 0xfff; |
1007 |
|
|
uint32_t addr = (u_bit? imm : -imm); |
1008 |
|
|
if (r16 == ARM_PC) |
1009 |
|
|
addr += dumpaddr + 8; |
1010 |
|
|
else |
1011 |
|
|
addr += cpu->cd.arm.r[r16]; |
1012 |
|
|
symbol = get_symbol_name(&cpu->machine->symbol_context, |
1013 |
|
|
addr, &offset); |
1014 |
|
|
if (symbol != NULL) |
1015 |
|
|
debug(" \t<%s", symbol); |
1016 |
|
|
else |
1017 |
|
|
debug(" \t<0x%08x", addr); |
1018 |
|
|
if ((l_bit && cpu->memory_rw(cpu, cpu->mem, addr, tmpw, |
1019 |
|
|
b_bit? 1 : sizeof(tmpw), MEM_READ, NO_EXCEPTIONS)) |
1020 |
|
|
|| (!l_bit && running)) { |
1021 |
|
|
if (l_bit) { |
1022 |
|
|
if (cpu->byte_order == |
1023 |
|
|
EMUL_LITTLE_ENDIAN) |
1024 |
|
|
addr = tmpw[0] +(tmpw[1] << 8) + |
1025 |
|
|
(tmpw[2]<<16)+(tmpw[3]<<24); |
1026 |
|
|
else |
1027 |
|
|
addr = tmpw[3] + (tmpw[2]<<8) + |
1028 |
|
|
(tmpw[1]<<16)+(tmpw[0]<<24); |
1029 |
|
|
} else { |
1030 |
|
|
tmpw[0] = addr = cpu->cd.arm.r[r12]; |
1031 |
|
|
if (r12 == ARM_PC) |
1032 |
|
|
addr += 8; |
1033 |
|
|
} |
1034 |
|
|
debug(": "); |
1035 |
|
|
if (b_bit) |
1036 |
|
|
debug("%i", tmpw[0]); |
1037 |
|
|
else { |
1038 |
|
|
symbol = get_symbol_name(&cpu->machine-> |
1039 |
|
|
symbol_context, addr, &offset); |
1040 |
|
|
if (symbol != NULL) |
1041 |
|
|
debug("%s", symbol); |
1042 |
|
|
else if ((int32_t)addr > -256 && |
1043 |
|
|
(int32_t)addr < 256) |
1044 |
|
|
debug("%i", addr); |
1045 |
|
|
else |
1046 |
|
|
debug("0x%x", addr); |
1047 |
|
|
} |
1048 |
|
|
} |
1049 |
|
|
debug(">"); |
1050 |
|
|
} |
1051 |
|
|
debug("\n"); |
1052 |
|
|
break; |
1053 |
|
|
case 0x8: /* Block Data Transfer */ |
1054 |
|
|
case 0x9: |
1055 |
|
|
/* xxxx100P USWLnnnn llllllll llllllll */ |
1056 |
|
|
p_bit = main_opcode & 1; |
1057 |
|
|
s_bit = b_bit; |
1058 |
|
|
debug("%s%s", l_bit? "ldm" : "stm", condition); |
1059 |
|
|
switch (u_bit * 2 + p_bit) { |
1060 |
|
|
case 0: debug("da"); break; |
1061 |
|
|
case 1: debug("db"); break; |
1062 |
|
|
case 2: debug("ia"); break; |
1063 |
|
|
case 3: debug("ib"); break; |
1064 |
|
|
} |
1065 |
|
|
debug("\t%s", arm_regname[r16]); |
1066 |
|
|
if (w_bit) |
1067 |
|
|
debug("!"); |
1068 |
|
|
debug(",{"); |
1069 |
|
|
n = 0; |
1070 |
|
|
for (i=0; i<16; i++) |
1071 |
|
|
if ((iw >> i) & 1) { |
1072 |
|
|
debug("%s%s", (n > 0)? ",":"", arm_regname[i]); |
1073 |
|
|
n++; |
1074 |
|
|
} |
1075 |
|
|
debug("}"); |
1076 |
|
|
if (s_bit) |
1077 |
|
|
debug("^"); |
1078 |
|
|
debug("\n"); |
1079 |
|
|
break; |
1080 |
|
|
case 0xa: /* B: branch */ |
1081 |
|
|
case 0xb: /* BL: branch and link */ |
1082 |
|
|
debug("b%s%s\t", main_opcode == 0xa? "" : "l", condition); |
1083 |
|
|
tmp = (iw & 0x00ffffff) << 2; |
1084 |
|
|
if (tmp & 0x02000000) |
1085 |
|
|
tmp |= 0xfc000000; |
1086 |
|
|
tmp = (int32_t)(dumpaddr + tmp + 8); |
1087 |
|
|
debug("0x%x", (int)tmp); |
1088 |
|
|
symbol = get_symbol_name(&cpu->machine->symbol_context, |
1089 |
|
|
tmp, &offset); |
1090 |
|
|
if (symbol != NULL) |
1091 |
|
|
debug(" \t<%s>", symbol); |
1092 |
|
|
debug("\n"); |
1093 |
|
|
break; |
1094 |
|
|
case 0xc: /* Coprocessor */ |
1095 |
|
|
case 0xd: /* LDC/STC */ |
1096 |
|
|
/* xxxx110P UNWLnnnn DDDDpppp oooooooo LDC/STC */ |
1097 |
|
|
debug("TODO: coprocessor LDC/STC\n"); |
1098 |
|
|
break; |
1099 |
|
|
case 0xe: /* CDP (Coprocessor Op) */ |
1100 |
|
|
/* or MRC/MCR! |
1101 |
|
|
* xxxx1110 oooonnnn ddddpppp qqq0mmmm CDP |
1102 |
|
|
* xxxx1110 oooLNNNN ddddpppp qqq1MMMM MRC/MCR |
1103 |
|
|
*/ |
1104 |
|
|
if (iw & 0x10) { |
1105 |
|
|
debug("%s%s\t", |
1106 |
|
|
(iw & 0x00100000)? "mrc" : "mcr", condition); |
1107 |
|
|
debug("%i,%i,r%i,cr%i,cr%i,%i", |
1108 |
|
|
(int)((iw >> 8) & 15), (int)((iw >>21) & 7), |
1109 |
|
|
(int)((iw >>12) & 15), (int)((iw >>16) & 15), |
1110 |
|
|
(int)((iw >> 0) & 15), (int)((iw >> 5) & 7)); |
1111 |
|
|
} else { |
1112 |
|
|
debug("cdp%s\t", condition); |
1113 |
|
|
debug("%i,%i,cr%i,cr%i,cr%i", |
1114 |
|
|
(int)((iw >> 8) & 15), |
1115 |
|
|
(int)((iw >>20) & 15), |
1116 |
|
|
(int)((iw >>12) & 15), |
1117 |
|
|
(int)((iw >>16) & 15), |
1118 |
|
|
(int)((iw >> 0) & 15)); |
1119 |
|
|
if ((iw >> 5) & 7) |
1120 |
|
|
debug(",0x%x", (int)((iw >> 5) & 7)); |
1121 |
|
|
} |
1122 |
|
|
debug("\n"); |
1123 |
|
|
break; |
1124 |
|
|
case 0xf: /* SWI */ |
1125 |
|
|
debug("swi%s\t", condition); |
1126 |
|
|
debug("0x%x\n", (int)(iw & 0x00ffffff)); |
1127 |
|
|
break; |
1128 |
|
|
default:debug("UNIMPLEMENTED\n"); |
1129 |
|
|
} |
1130 |
|
|
|
1131 |
|
|
return sizeof(uint32_t); |
1132 |
|
|
} |
1133 |
|
|
|
1134 |
|
|
|
1135 |
|
|
/*****************************************************************************/ |
1136 |
|
|
|
1137 |
|
|
|
1138 |
|
|
/* |
1139 |
|
|
* arm_mcr_mrc(): |
1140 |
|
|
* |
1141 |
|
|
* Coprocessor register move. |
1142 |
|
|
* |
1143 |
|
|
* The program counter should be synched before calling this function (to |
1144 |
|
|
* make debug output with the correct PC value possible). |
1145 |
|
|
*/ |
1146 |
|
|
void arm_mcr_mrc(struct cpu *cpu, uint32_t iword) |
1147 |
|
|
{ |
1148 |
|
|
int opcode1 = (iword >> 21) & 7; |
1149 |
|
|
int l_bit = (iword >> 20) & 1; |
1150 |
|
|
int crn = (iword >> 16) & 15; |
1151 |
|
|
int rd = (iword >> 12) & 15; |
1152 |
|
|
int cp_num = (iword >> 8) & 15; |
1153 |
|
|
int opcode2 = (iword >> 5) & 7; |
1154 |
|
|
int crm = iword & 15; |
1155 |
|
|
|
1156 |
|
|
if (cpu->cd.arm.coproc[cp_num] != NULL) |
1157 |
|
|
cpu->cd.arm.coproc[cp_num](cpu, opcode1, opcode2, l_bit, |
1158 |
|
|
crn, crm, rd); |
1159 |
|
|
else { |
1160 |
|
|
fatal("arm_mcr_mrc: pc=0x%08x, iword=0x%08x: " |
1161 |
|
|
"cp_num=%i\n", (int)cpu->pc, iword, cp_num); |
1162 |
|
|
exit(1); |
1163 |
|
|
} |
1164 |
|
|
} |
1165 |
|
|
|
1166 |
|
|
|
1167 |
|
|
/* |
1168 |
|
|
* arm_cdp(): |
1169 |
|
|
* |
1170 |
|
|
* Coprocessor operations. |
1171 |
|
|
* |
1172 |
|
|
* The program counter should be synched before calling this function (to |
1173 |
|
|
* make debug output with the correct PC value possible). |
1174 |
|
|
*/ |
1175 |
|
|
void arm_cdp(struct cpu *cpu, uint32_t iword) |
1176 |
|
|
{ |
1177 |
|
|
fatal("arm_cdp: pc=0x%08x, iword=0x%08x\n", (int)cpu->pc, iword); |
1178 |
|
|
exit(1); |
1179 |
|
|
} |
1180 |
|
|
|
1181 |
|
|
|
1182 |
|
|
/*****************************************************************************/ |
1183 |
|
|
|
1184 |
|
|
|
1185 |
|
|
#include "tmp_arm_tail.c" |
1186 |
|
|
|