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- /***************************************************************************
- * Copyright (C) 2005 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * 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, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include "arm7_9_common.h"
- #include "log.h"
- #include "command.h"
- #include "armv4_5_mmu.h"
- #include "target.h"
-
- #include <stdlib.h>
-
- u32 armv4mmu_translate_va(target_t *target, armv4_5_mmu_common_t *armv4_5_mmu, u32 va, int *type, u32 *cb, int *domain, u32 *ap);
- int armv4_5_mmu_read_physical(target_t *target, armv4_5_mmu_common_t *armv4_5_mmu, u32 address, u32 size, u32 count, u8 *buffer);
- int armv4_5_mmu_write_physical(target_t *target, armv4_5_mmu_common_t *armv4_5_mmu, u32 address, u32 size, u32 count, u8 *buffer);
-
- char* armv4_5_mmu_page_type_names[] =
- {
- "section", "large page", "small page", "tiny page"
- };
-
- u32 armv4_5_mmu_translate_va(target_t *target, armv4_5_mmu_common_t *armv4_5_mmu, u32 va, int *type, u32 *cb, int *domain, u32 *ap)
- {
- u32 first_lvl_descriptor = 0x0;
- u32 second_lvl_descriptor = 0x0;
- u32 ttb = armv4_5_mmu->get_ttb(target);
-
- armv4_5_mmu_read_physical(target, armv4_5_mmu,
- (ttb & 0xffffc000) | ((va & 0xfff00000) >> 18),
- 4, 1, (u8*)&first_lvl_descriptor);
- first_lvl_descriptor = target_buffer_get_u32(target, (u8*)&first_lvl_descriptor);
-
- LOG_DEBUG("1st lvl desc: %8.8x", first_lvl_descriptor);
-
- if ((first_lvl_descriptor & 0x3) == 0)
- {
- *type = -1;
- LOG_ERROR("Address translation failure");
- return ERROR_TARGET_TRANSLATION_FAULT;
- }
-
- if (!armv4_5_mmu->has_tiny_pages && ((first_lvl_descriptor & 0x3) == 3))
- {
- *type = -1;
- LOG_ERROR("Address translation failure");
- return ERROR_TARGET_TRANSLATION_FAULT;
- }
-
- /* domain is always specified in bits 8-5 */
- *domain = (first_lvl_descriptor & 0x1e0) >> 5;
-
- if ((first_lvl_descriptor & 0x3) == 2)
- {
- /* section descriptor */
- *type = ARMV4_5_SECTION;
- *cb = (first_lvl_descriptor & 0xc) >> 2;
- *ap = (first_lvl_descriptor & 0xc00) >> 10;
- return (first_lvl_descriptor & 0xfff00000) | (va & 0x000fffff);
- }
-
- if ((first_lvl_descriptor & 0x3) == 1)
- {
- /* coarse page table */
- armv4_5_mmu_read_physical(target, armv4_5_mmu,
- (first_lvl_descriptor & 0xfffffc00) | ((va & 0x000ff000) >> 10),
- 4, 1, (u8*)&second_lvl_descriptor);
- }
- else if ((first_lvl_descriptor & 0x3) == 3)
- {
- /* fine page table */
- armv4_5_mmu_read_physical(target, armv4_5_mmu,
- (first_lvl_descriptor & 0xfffff000) | ((va & 0x000ffc00) >> 8),
- 4, 1, (u8*)&second_lvl_descriptor);
- }
-
- second_lvl_descriptor = target_buffer_get_u32(target, (u8*)&second_lvl_descriptor);
-
- LOG_DEBUG("2nd lvl desc: %8.8x", second_lvl_descriptor);
-
- if ((second_lvl_descriptor & 0x3) == 0)
- {
- *type = -1;
- LOG_ERROR("Address translation failure");
- return ERROR_TARGET_TRANSLATION_FAULT;
- }
-
- /* cacheable/bufferable is always specified in bits 3-2 */
- *cb = (second_lvl_descriptor & 0xc) >> 2;
-
- if ((second_lvl_descriptor & 0x3) == 1)
- {
- /* large page descriptor */
- *type = ARMV4_5_LARGE_PAGE;
- *ap = (second_lvl_descriptor & 0xff0) >> 4;
- return (second_lvl_descriptor & 0xffff0000) | (va & 0x0000ffff);
- }
-
- if ((second_lvl_descriptor & 0x3) == 2)
- {
- /* small page descriptor */
- *type = ARMV4_5_SMALL_PAGE;
- *ap = (second_lvl_descriptor & 0xff0) >> 4;
- return (second_lvl_descriptor & 0xfffff000) | (va & 0x00000fff);
- }
-
- if ((second_lvl_descriptor & 0x3) == 3)
- {
- /* tiny page descriptor */
- *type = ARMV4_5_TINY_PAGE;
- *ap = (second_lvl_descriptor & 0x30) >> 4;
- return (second_lvl_descriptor & 0xfffffc00) | (va & 0x000003ff);
- }
-
- /* should not happen */
- *type = -1;
- LOG_ERROR("Address translation failure");
- return ERROR_TARGET_TRANSLATION_FAULT;
- }
-
- int armv4_5_mmu_read_physical(target_t *target, armv4_5_mmu_common_t *armv4_5_mmu, u32 address, u32 size, u32 count, u8 *buffer)
- {
- int retval;
-
- if (target->state != TARGET_HALTED)
- return ERROR_TARGET_NOT_HALTED;
-
- /* disable MMU and data (or unified) cache */
- armv4_5_mmu->disable_mmu_caches(target, 1, 1, 0);
-
- retval = armv4_5_mmu->read_memory(target, address, size, count, buffer);
-
- /* reenable MMU / cache */
- armv4_5_mmu->enable_mmu_caches(target, armv4_5_mmu->mmu_enabled,
- armv4_5_mmu->armv4_5_cache.d_u_cache_enabled,
- armv4_5_mmu->armv4_5_cache.i_cache_enabled);
-
- return retval;
- }
-
- int armv4_5_mmu_write_physical(target_t *target, armv4_5_mmu_common_t *armv4_5_mmu, u32 address, u32 size, u32 count, u8 *buffer)
- {
- int retval;
-
- if (target->state != TARGET_HALTED)
- return ERROR_TARGET_NOT_HALTED;
-
- /* disable MMU and data (or unified) cache */
- armv4_5_mmu->disable_mmu_caches(target, 1, 1, 0);
-
- retval = armv4_5_mmu->write_memory(target, address, size, count, buffer);
-
- /* reenable MMU / cache */
- armv4_5_mmu->enable_mmu_caches(target, armv4_5_mmu->mmu_enabled,
- armv4_5_mmu->armv4_5_cache.d_u_cache_enabled,
- armv4_5_mmu->armv4_5_cache.i_cache_enabled);
-
- return retval;
- }
-
- int armv4_5_mmu_handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc, target_t *target, armv4_5_mmu_common_t *armv4_5_mmu)
- {
- u32 va;
- u32 pa;
- int type;
- u32 cb;
- int domain;
- u32 ap;
-
- if (target->state != TARGET_HALTED)
- {
- command_print(cmd_ctx, "target must be stopped for \"virt2phys\" command");
- return ERROR_OK;
- }
-
- if (argc == 0)
- {
- command_print(cmd_ctx, "usage: virt2phys <virtual address>");
- return ERROR_OK;
- }
-
- if (argc == 1)
- {
- va = strtoul(args[0], NULL, 0);
- pa = armv4_5_mmu_translate_va(target, armv4_5_mmu, va, &type, &cb, &domain, &ap);
- if (type == -1)
- {
- switch (pa)
- {
- case ERROR_TARGET_TRANSLATION_FAULT:
- command_print(cmd_ctx, "no valid translation for 0x%8.8x", va);
- break;
- default:
- command_print(cmd_ctx, "unknown translation error");
- }
- return ERROR_OK;
- }
-
- command_print(cmd_ctx, "0x%8.8x -> 0x%8.8x, type: %s, cb: %i, domain: %i, ap: %2.2x",
- va, pa, armv4_5_mmu_page_type_names[type], cb, domain, ap);
- }
-
- return ERROR_OK;
- }
-
- int armv4_5_mmu_handle_md_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc, target_t *target, armv4_5_mmu_common_t *armv4_5_mmu)
- {
- int count = 1;
- int size = 4;
- u32 address = 0;
- int i;
-
- char output[128];
- int output_len;
-
- int retval;
-
- u8 *buffer;
-
- if (target->state != TARGET_HALTED)
- {
- command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
- return ERROR_OK;
- }
-
- if (argc < 1)
- return ERROR_OK;
-
- if (argc == 2)
- count = strtoul(args[1], NULL, 0);
-
- address = strtoul(args[0], NULL, 0);
-
- switch (cmd[2])
- {
- case 'w':
- size = 4;
- break;
- case 'h':
- size = 2;
- break;
- case 'b':
- size = 1;
- break;
- default:
- return ERROR_OK;
- }
-
- buffer = calloc(count, size);
- if ((retval = armv4_5_mmu_read_physical(target, armv4_5_mmu, address, size, count, buffer)) != ERROR_OK)
- {
- switch (retval)
- {
- case ERROR_TARGET_UNALIGNED_ACCESS:
- command_print(cmd_ctx, "error: address not aligned");
- break;
- case ERROR_TARGET_NOT_HALTED:
- command_print(cmd_ctx, "error: target must be halted for memory accesses");
- break;
- case ERROR_TARGET_DATA_ABORT:
- command_print(cmd_ctx, "error: access caused data abort, system possibly corrupted");
- break;
- default:
- command_print(cmd_ctx, "error: unknown error");
- }
- }
-
- output_len = 0;
-
- for (i = 0; i < count; i++)
- {
- if (i%8 == 0)
- output_len += snprintf(output + output_len, 128 - output_len, "0x%8.8x: ", address + (i*size));
-
- switch (size)
- {
- case 4:
- output_len += snprintf(output + output_len, 128 - output_len, "%8.8x ", target_buffer_get_u32(target, &buffer[i*4]));
- break;
- case 2:
- output_len += snprintf(output + output_len, 128 - output_len, "%4.4x ", target_buffer_get_u16(target, &buffer[i*2]));
- break;
- case 1:
- output_len += snprintf(output + output_len, 128 - output_len, "%2.2x ", buffer[i*1]);
- break;
- }
-
- if ((i % 8 == 7) || (i == count - 1))
- {
- command_print(cmd_ctx, output);
- output_len = 0;
- }
- }
-
- free(buffer);
-
- return ERROR_OK;
- }
-
- int armv4_5_mmu_handle_mw_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc, target_t *target, armv4_5_mmu_common_t *armv4_5_mmu)
- {
- u32 address = 0;
- u32 value = 0;
- int retval;
- u8 value_buf[4];
-
- if (target->state != TARGET_HALTED)
- {
- command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
- return ERROR_OK;
- }
-
- if (argc < 2)
- return ERROR_OK;
-
- address = strtoul(args[0], NULL, 0);
- value = strtoul(args[1], NULL, 0);
-
- switch (cmd[2])
- {
- case 'w':
- target_buffer_set_u32(target, value_buf, value);
- retval = armv4_5_mmu_write_physical(target, armv4_5_mmu, address, 4, 1, value_buf);
- break;
- case 'h':
- target_buffer_set_u16(target, value_buf, value);
- retval = armv4_5_mmu_write_physical(target, armv4_5_mmu, address, 2, 1, value_buf);
- break;
- case 'b':
- value_buf[0] = value;
- retval = armv4_5_mmu_write_physical(target, armv4_5_mmu, address, 1, 1, value_buf);
- break;
- default:
- return ERROR_OK;
- }
-
- switch (retval)
- {
- case ERROR_TARGET_UNALIGNED_ACCESS:
- command_print(cmd_ctx, "error: address not aligned");
- break;
- case ERROR_TARGET_DATA_ABORT:
- command_print(cmd_ctx, "error: access caused data abort, system possibly corrupted");
- break;
- case ERROR_TARGET_NOT_HALTED:
- command_print(cmd_ctx, "error: target must be halted for memory accesses");
- break;
- case ERROR_OK:
- break;
- default:
- command_print(cmd_ctx, "error: unknown error");
- }
-
- return ERROR_OK;
- }
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