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- /***************************************************************************
- * Copyright (C) 2009 by David Brownell *
- * *
- * Copyright (C) ST-Ericsson SA 2011 michel.jaouen@stericsson.com *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program. If not, see <http://www.gnu.org/licenses/>. *
- ***************************************************************************/
-
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include <helper/replacements.h>
-
- #include "armv7a.h"
- #include "armv7a_mmu.h"
- #include "arm_disassembler.h"
-
- #include "register.h"
- #include <helper/binarybuffer.h>
- #include <helper/command.h>
-
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
-
- #include "arm_opcodes.h"
- #include "target.h"
- #include "target_type.h"
-
- static void armv7a_show_fault_registers(struct target *target)
- {
- uint32_t dfsr, ifsr, dfar, ifar;
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct arm_dpm *dpm = armv7a->arm.dpm;
- int retval;
-
- retval = dpm->prepare(dpm);
- if (retval != ERROR_OK)
- return;
-
- /* ARMV4_5_MRC(cpnum, op1, r0, crn, crm, op2) */
-
- /* c5/c0 - {data, instruction} fault status registers */
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 0, 0, 5, 0, 0),
- &dfsr);
- if (retval != ERROR_OK)
- goto done;
-
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 0, 0, 5, 0, 1),
- &ifsr);
- if (retval != ERROR_OK)
- goto done;
-
- /* c6/c0 - {data, instruction} fault address registers */
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 0, 0, 6, 0, 0),
- &dfar);
- if (retval != ERROR_OK)
- goto done;
-
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 0, 0, 6, 0, 2),
- &ifar);
- if (retval != ERROR_OK)
- goto done;
-
- LOG_USER("Data fault registers DFSR: %8.8" PRIx32
- ", DFAR: %8.8" PRIx32, dfsr, dfar);
- LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
- ", IFAR: %8.8" PRIx32, ifsr, ifar);
-
- done:
- /* (void) */ dpm->finish(dpm);
- }
-
-
- /* retrieve main id register */
- static int armv7a_read_midr(struct target *target)
- {
- int retval = ERROR_FAIL;
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct arm_dpm *dpm = armv7a->arm.dpm;
- uint32_t midr;
- retval = dpm->prepare(dpm);
- if (retval != ERROR_OK)
- goto done;
- /* MRC p15,0,<Rd>,c0,c0,0; read main id register*/
-
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 0, 0, 0, 0, 0),
- &midr);
- if (retval != ERROR_OK)
- goto done;
-
- armv7a->rev = (midr & 0xf);
- armv7a->partnum = (midr >> 4) & 0xfff;
- armv7a->arch = (midr >> 16) & 0xf;
- armv7a->variant = (midr >> 20) & 0xf;
- armv7a->implementor = (midr >> 24) & 0xff;
- LOG_INFO("%s rev %" PRIx32 ", partnum %" PRIx32 ", arch %" PRIx32
- ", variant %" PRIx32 ", implementor %" PRIx32,
- target->cmd_name,
- armv7a->rev,
- armv7a->partnum,
- armv7a->arch,
- armv7a->variant,
- armv7a->implementor);
-
- done:
- dpm->finish(dpm);
- return retval;
- }
-
- int armv7a_read_ttbcr(struct target *target)
- {
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct arm_dpm *dpm = armv7a->arm.dpm;
- uint32_t ttbcr, ttbcr_n;
- int ttbidx;
- int retval;
-
- retval = dpm->prepare(dpm);
- if (retval != ERROR_OK)
- goto done;
-
- /* MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 0, 0, 2, 0, 2),
- &ttbcr);
- if (retval != ERROR_OK)
- goto done;
-
- LOG_DEBUG("ttbcr %" PRIx32, ttbcr);
-
- ttbcr_n = ttbcr & 0x7;
- armv7a->armv7a_mmu.ttbcr = ttbcr;
- armv7a->armv7a_mmu.cached = 1;
-
- for (ttbidx = 0; ttbidx < 2; ttbidx++) {
- /* MRC p15,0,<Rt>,c2,c0,ttbidx */
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 0, 0, 2, 0, ttbidx),
- &armv7a->armv7a_mmu.ttbr[ttbidx]);
- if (retval != ERROR_OK)
- goto done;
- }
-
- /*
- * ARM Architecture Reference Manual (ARMv7-A and ARMv7-R edition),
- * document # ARM DDI 0406C
- */
- armv7a->armv7a_mmu.ttbr_range[0] = 0xffffffff >> ttbcr_n;
- armv7a->armv7a_mmu.ttbr_range[1] = 0xffffffff;
- armv7a->armv7a_mmu.ttbr_mask[0] = 0xffffffff << (14 - ttbcr_n);
- armv7a->armv7a_mmu.ttbr_mask[1] = 0xffffffff << 14;
- armv7a->armv7a_mmu.cached = 1;
-
- retval = armv7a_read_midr(target);
- if (retval != ERROR_OK)
- goto done;
-
- /* FIXME: why this special case based on part number? */
- if ((armv7a->partnum & 0xf) == 0) {
- /* ARM DDI 0344H , ARM DDI 0407F */
- armv7a->armv7a_mmu.ttbr_mask[0] = 7 << (32 - ttbcr_n);
- }
-
- LOG_DEBUG("ttbr1 %s, ttbr0_mask %" PRIx32 " ttbr1_mask %" PRIx32,
- (ttbcr_n != 0) ? "used" : "not used",
- armv7a->armv7a_mmu.ttbr_mask[0],
- armv7a->armv7a_mmu.ttbr_mask[1]);
-
- done:
- dpm->finish(dpm);
- return retval;
- }
-
- /* FIXME: remove it */
- static int armv7a_l2x_cache_init(struct target *target, uint32_t base, uint32_t way)
- {
- struct armv7a_l2x_cache *l2x_cache;
- struct target_list *head = target->head;
- struct target *curr;
-
- struct armv7a_common *armv7a = target_to_armv7a(target);
- l2x_cache = calloc(1, sizeof(struct armv7a_l2x_cache));
- l2x_cache->base = base;
- l2x_cache->way = way;
- /*LOG_INFO("cache l2 initialized base %x way %d",
- l2x_cache->base,l2x_cache->way);*/
- if (armv7a->armv7a_mmu.armv7a_cache.outer_cache)
- LOG_INFO("outer cache already initialized\n");
- armv7a->armv7a_mmu.armv7a_cache.outer_cache = l2x_cache;
- /* initialize all target in this cluster (smp target)
- * l2 cache must be configured after smp declaration */
- while (head != (struct target_list *)NULL) {
- curr = head->target;
- if (curr != target) {
- armv7a = target_to_armv7a(curr);
- if (armv7a->armv7a_mmu.armv7a_cache.outer_cache)
- LOG_ERROR("smp target : outer cache already initialized\n");
- armv7a->armv7a_mmu.armv7a_cache.outer_cache = l2x_cache;
- }
- head = head->next;
- }
- return JIM_OK;
- }
-
- /* FIXME: remove it */
- COMMAND_HANDLER(handle_cache_l2x)
- {
- struct target *target = get_current_target(CMD_CTX);
- uint32_t base, way;
-
- if (CMD_ARGC != 2)
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- /* command_print(CMD, "%s %s", CMD_ARGV[0], CMD_ARGV[1]); */
- COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], base);
- COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], way);
-
- /* AP address is in bits 31:24 of DP_SELECT */
- armv7a_l2x_cache_init(target, base, way);
-
- return ERROR_OK;
- }
-
- int armv7a_handle_cache_info_command(struct command_invocation *cmd,
- struct armv7a_cache_common *armv7a_cache)
- {
- struct armv7a_l2x_cache *l2x_cache = (struct armv7a_l2x_cache *)
- (armv7a_cache->outer_cache);
-
- int cl;
-
- if (armv7a_cache->info == -1) {
- command_print(cmd, "cache not yet identified");
- return ERROR_OK;
- }
-
- for (cl = 0; cl < armv7a_cache->loc; cl++) {
- struct armv7a_arch_cache *arch = &(armv7a_cache->arch[cl]);
-
- if (arch->ctype & 1) {
- command_print(cmd,
- "L%d I-Cache: linelen %" PRIu32
- ", associativity %" PRIu32
- ", nsets %" PRIu32
- ", cachesize %" PRIu32 " KBytes",
- cl+1,
- arch->i_size.linelen,
- arch->i_size.associativity,
- arch->i_size.nsets,
- arch->i_size.cachesize);
- }
-
- if (arch->ctype >= 2) {
- command_print(cmd,
- "L%d D-Cache: linelen %" PRIu32
- ", associativity %" PRIu32
- ", nsets %" PRIu32
- ", cachesize %" PRIu32 " KBytes",
- cl+1,
- arch->d_u_size.linelen,
- arch->d_u_size.associativity,
- arch->d_u_size.nsets,
- arch->d_u_size.cachesize);
- }
- }
-
- if (l2x_cache)
- command_print(cmd, "Outer unified cache Base Address 0x%" PRIx32 ", %" PRIu32 " ways",
- l2x_cache->base, l2x_cache->way);
-
- return ERROR_OK;
- }
-
- /* retrieve core id cluster id */
- static int armv7a_read_mpidr(struct target *target)
- {
- int retval = ERROR_FAIL;
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct arm_dpm *dpm = armv7a->arm.dpm;
- uint32_t mpidr;
- retval = dpm->prepare(dpm);
- if (retval != ERROR_OK)
- goto done;
- /* MRC p15,0,<Rd>,c0,c0,5; read Multiprocessor ID register*/
-
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
- &mpidr);
- if (retval != ERROR_OK)
- goto done;
-
- /* Is register in Multiprocessing Extensions register format? */
- if (mpidr & MPIDR_MP_EXT) {
- LOG_DEBUG("%s: MPIDR 0x%" PRIx32, target_name(target), mpidr);
- armv7a->multi_processor_system = (mpidr >> 30) & 1;
- armv7a->multi_threading_processor = (mpidr >> 24) & 1;
- armv7a->level2_id = (mpidr >> 16) & 0xf;
- armv7a->cluster_id = (mpidr >> 8) & 0xf;
- armv7a->cpu_id = mpidr & 0xf;
- LOG_INFO("%s: MPIDR level2 %x, cluster %x, core %x, %s, %s",
- target_name(target),
- armv7a->level2_id,
- armv7a->cluster_id,
- armv7a->cpu_id,
- armv7a->multi_processor_system == 0 ? "multi core" : "mono core",
- armv7a->multi_threading_processor == 1 ? "SMT" : "no SMT");
-
- } else
- LOG_ERROR("MPIDR not in multiprocessor format");
-
- done:
- dpm->finish(dpm);
- return retval;
-
-
- }
-
- static int get_cache_info(struct arm_dpm *dpm, int cl, int ct, uint32_t *cache_reg)
- {
- int retval = ERROR_OK;
-
- /* select cache level */
- retval = dpm->instr_write_data_r0(dpm,
- ARMV4_5_MCR(15, 2, 0, 0, 0, 0),
- (cl << 1) | (ct == 1 ? 1 : 0));
- if (retval != ERROR_OK)
- goto done;
-
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
- cache_reg);
- done:
- return retval;
- }
-
- static struct armv7a_cachesize decode_cache_reg(uint32_t cache_reg)
- {
- struct armv7a_cachesize size;
- int i = 0;
-
- size.linelen = 16 << (cache_reg & 0x7);
- size.associativity = ((cache_reg >> 3) & 0x3ff) + 1;
- size.nsets = ((cache_reg >> 13) & 0x7fff) + 1;
- size.cachesize = size.linelen * size.associativity * size.nsets / 1024;
-
- /* compute info for set way operation on cache */
- size.index_shift = (cache_reg & 0x7) + 4;
- size.index = (cache_reg >> 13) & 0x7fff;
- size.way = ((cache_reg >> 3) & 0x3ff);
-
- while (((size.way << i) & 0x80000000) == 0)
- i++;
- size.way_shift = i;
-
- return size;
- }
-
- int armv7a_identify_cache(struct target *target)
- {
- /* read cache descriptor */
- int retval = ERROR_FAIL;
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct arm_dpm *dpm = armv7a->arm.dpm;
- uint32_t csselr, clidr, ctr;
- uint32_t cache_reg;
- int cl, ctype;
- struct armv7a_cache_common *cache =
- &(armv7a->armv7a_mmu.armv7a_cache);
-
- retval = dpm->prepare(dpm);
- if (retval != ERROR_OK)
- goto done;
-
- /* retrieve CTR
- * mrc p15, 0, r0, c0, c0, 1 @ read ctr */
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 0, 0, 0, 0, 1),
- &ctr);
- if (retval != ERROR_OK)
- goto done;
-
- cache->iminline = 4UL << (ctr & 0xf);
- cache->dminline = 4UL << ((ctr & 0xf0000) >> 16);
- LOG_DEBUG("ctr %" PRIx32 " ctr.iminline %" PRIu32 " ctr.dminline %" PRIu32,
- ctr, cache->iminline, cache->dminline);
-
- /* retrieve CLIDR
- * mrc p15, 1, r0, c0, c0, 1 @ read clidr */
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
- &clidr);
- if (retval != ERROR_OK)
- goto done;
-
- cache->loc = (clidr & 0x7000000) >> 24;
- LOG_DEBUG("Number of cache levels to PoC %" PRId32, cache->loc);
-
- /* retrieve selected cache for later restore
- * MRC p15, 2,<Rd>, c0, c0, 0; Read CSSELR */
- retval = dpm->instr_read_data_r0(dpm,
- ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
- &csselr);
- if (retval != ERROR_OK)
- goto done;
-
- /* retrieve all available inner caches */
- for (cl = 0; cl < cache->loc; clidr >>= 3, cl++) {
-
- /* isolate cache type at current level */
- ctype = clidr & 7;
-
- /* skip reserved values */
- if (ctype > CACHE_LEVEL_HAS_UNIFIED_CACHE)
- continue;
-
- /* separate d or unified d/i cache at this level ? */
- if (ctype & (CACHE_LEVEL_HAS_UNIFIED_CACHE | CACHE_LEVEL_HAS_D_CACHE)) {
- /* retrieve d-cache info */
- retval = get_cache_info(dpm, cl, 0, &cache_reg);
- if (retval != ERROR_OK)
- goto done;
- cache->arch[cl].d_u_size = decode_cache_reg(cache_reg);
-
- LOG_DEBUG("data/unified cache index %" PRIu32 " << %" PRIu32 ", way %" PRIu32 " << %" PRIu32,
- cache->arch[cl].d_u_size.index,
- cache->arch[cl].d_u_size.index_shift,
- cache->arch[cl].d_u_size.way,
- cache->arch[cl].d_u_size.way_shift);
-
- LOG_DEBUG("cacheline %" PRIu32 " bytes %" PRIu32 " KBytes asso %" PRIu32 " ways",
- cache->arch[cl].d_u_size.linelen,
- cache->arch[cl].d_u_size.cachesize,
- cache->arch[cl].d_u_size.associativity);
- }
-
- /* separate i-cache at this level ? */
- if (ctype & CACHE_LEVEL_HAS_I_CACHE) {
- /* retrieve i-cache info */
- retval = get_cache_info(dpm, cl, 1, &cache_reg);
- if (retval != ERROR_OK)
- goto done;
- cache->arch[cl].i_size = decode_cache_reg(cache_reg);
-
- LOG_DEBUG("instruction cache index %" PRIu32 " << %" PRIu32 ", way %" PRIu32 " << %" PRIu32,
- cache->arch[cl].i_size.index,
- cache->arch[cl].i_size.index_shift,
- cache->arch[cl].i_size.way,
- cache->arch[cl].i_size.way_shift);
-
- LOG_DEBUG("cacheline %" PRIu32 " bytes %" PRIu32 " KBytes asso %" PRIu32 " ways",
- cache->arch[cl].i_size.linelen,
- cache->arch[cl].i_size.cachesize,
- cache->arch[cl].i_size.associativity);
- }
-
- cache->arch[cl].ctype = ctype;
- }
-
- /* restore selected cache */
- dpm->instr_write_data_r0(dpm,
- ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
- csselr);
-
- if (retval != ERROR_OK)
- goto done;
-
- /* if no l2 cache initialize l1 data cache flush function function */
- if (!armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache) {
- armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache =
- armv7a_cache_auto_flush_all_data;
- }
-
- armv7a->armv7a_mmu.armv7a_cache.info = 1;
- done:
- dpm->finish(dpm);
- armv7a_read_mpidr(target);
- return retval;
-
- }
-
- static int armv7a_setup_semihosting(struct target *target, int enable)
- {
- struct armv7a_common *armv7a = target_to_armv7a(target);
- uint32_t vcr;
- int ret;
-
- ret = mem_ap_read_atomic_u32(armv7a->debug_ap,
- armv7a->debug_base + CPUDBG_VCR,
- &vcr);
- if (ret < 0) {
- LOG_ERROR("Failed to read VCR register\n");
- return ret;
- }
-
- if (enable)
- vcr |= DBG_VCR_SVC_MASK;
- else
- vcr &= ~DBG_VCR_SVC_MASK;
-
- ret = mem_ap_write_atomic_u32(armv7a->debug_ap,
- armv7a->debug_base + CPUDBG_VCR,
- vcr);
- if (ret < 0)
- LOG_ERROR("Failed to write VCR register\n");
-
- return ret;
- }
-
- int armv7a_init_arch_info(struct target *target, struct armv7a_common *armv7a)
- {
- struct arm *arm = &armv7a->arm;
- arm->arch_info = armv7a;
- target->arch_info = &armv7a->arm;
- arm->setup_semihosting = armv7a_setup_semihosting;
- /* target is useful in all function arm v4 5 compatible */
- armv7a->arm.target = target;
- armv7a->arm.common_magic = ARM_COMMON_MAGIC;
- armv7a->common_magic = ARMV7_COMMON_MAGIC;
- armv7a->armv7a_mmu.armv7a_cache.info = -1;
- armv7a->armv7a_mmu.armv7a_cache.outer_cache = NULL;
- armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache = NULL;
- armv7a->armv7a_mmu.armv7a_cache.auto_cache_enabled = 1;
- return ERROR_OK;
- }
-
- int armv7a_arch_state(struct target *target)
- {
- static const char *state[] = {
- "disabled", "enabled"
- };
-
- struct armv7a_common *armv7a = target_to_armv7a(target);
- struct arm *arm = &armv7a->arm;
-
- if (armv7a->common_magic != ARMV7_COMMON_MAGIC) {
- LOG_ERROR("BUG: called for a non-ARMv7A target");
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- arm_arch_state(target);
-
- if (armv7a->is_armv7r) {
- LOG_USER("D-Cache: %s, I-Cache: %s",
- state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
- state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
- } else {
- LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
- state[armv7a->armv7a_mmu.mmu_enabled],
- state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
- state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
- }
-
- if (arm->core_mode == ARM_MODE_ABT)
- armv7a_show_fault_registers(target);
-
- return ERROR_OK;
- }
-
- static const struct command_registration l2_cache_commands[] = {
- {
- .name = "l2x",
- .handler = handle_cache_l2x,
- .mode = COMMAND_EXEC,
- .help = "configure l2x cache",
- .usage = "[base_addr] [number_of_way]",
- },
- COMMAND_REGISTRATION_DONE
-
- };
-
- static const struct command_registration l2x_cache_command_handlers[] = {
- {
- .name = "cache_config",
- .mode = COMMAND_EXEC,
- .help = "cache configuration for a target",
- .usage = "",
- .chain = l2_cache_commands,
- },
- COMMAND_REGISTRATION_DONE
- };
-
- const struct command_registration armv7a_command_handlers[] = {
- {
- .chain = l2x_cache_command_handlers,
- },
- {
- .chain = arm7a_cache_command_handlers,
- },
- COMMAND_REGISTRATION_DONE
- };
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