/* (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;
+}
+
static 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;
+ uint32_t ttbr0, ttbr1;
int retval = dpm->prepare(dpm);
if (retval != ERROR_OK)
goto done;
&ttbcr);
if (retval != ERROR_OK)
goto done;
+
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_MRC(15, 0, 0, 2, 0, 0),
+ &ttbr0);
+ if (retval != ERROR_OK)
+ goto done;
+
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV4_5_MRC(15, 0, 0, 2, 0, 1),
+ &ttbr1);
+ if (retval != ERROR_OK)
+ goto done;
+
+ LOG_INFO("ttbcr %" PRIx32 "ttbr0 %" PRIx32 "ttbr1 %" PRIx32, ttbcr, ttbr0, ttbr1);
+
armv7a->armv7a_mmu.ttbr1_used = ((ttbcr & 0x7) != 0) ? 1 : 0;
- armv7a->armv7a_mmu.ttbr0_mask = 7 << (32 - ((ttbcr & 0x7)));
-#if 0
- LOG_INFO("ttb1 %s ,ttb0_mask %x",
- armv7a->armv7a_mmu.ttbr1_used ? "used" : "not used",
- armv7a->armv7a_mmu.ttbr0_mask);
-#endif
- if (armv7a->armv7a_mmu.ttbr1_used == 1) {
- LOG_INFO("SVC access above %" PRIx32,
- (uint32_t)(0xffffffff & armv7a->armv7a_mmu.ttbr0_mask));
- armv7a->armv7a_mmu.os_border = 0xffffffff & armv7a->armv7a_mmu.ttbr0_mask;
+ armv7a->armv7a_mmu.ttbr0_mask = 0;
+
+ retval = armv7a_read_midr(target);
+ if (retval != ERROR_OK)
+ goto done;
+
+ if (armv7a->partnum & 0xf) {
+ /*
+ * ARM Architecture Reference Manual (ARMv7-A and ARMv7-Redition),
+ * document # ARM DDI 0406C
+ */
+ armv7a->armv7a_mmu.ttbr0_mask = 1 << (14 - ((ttbcr & 0x7)));
} else {
+ /* ARM DDI 0344H , ARM DDI 0407F */
+ armv7a->armv7a_mmu.ttbr0_mask = 7 << (32 - ((ttbcr & 0x7)));
/* fix me , default is hard coded LINUX border */
armv7a->armv7a_mmu.os_border = 0xc0000000;
}
+
+ LOG_DEBUG("ttbr1 %s, ttbr0_mask %" PRIx32,
+ armv7a->armv7a_mmu.ttbr1_used ? "used" : "not used",
+ armv7a->armv7a_mmu.ttbr0_mask);
+
+ if (armv7a->armv7a_mmu.ttbr1_used == 1) {
+ LOG_INFO("SVC access above %" PRIx32,
+ (0xffffffff & armv7a->armv7a_mmu.ttbr0_mask));
+ armv7a->armv7a_mmu.os_border = 0xffffffff & armv7a->armv7a_mmu.ttbr0_mask;
+ }
done:
dpm->finish(dpm);
return retval;
}
-
/* method adapted to cortex A : reused arm v4 v5 method*/
int armv7a_mmu_translate_va(struct target *target, uint32_t va, uint32_t *val)
{
}
- if ((first_lvl_descriptor & 0x3) == 2) {
+ if ((first_lvl_descriptor & 0x40002) == 2) {
/* section descriptor */
*val = (first_lvl_descriptor & 0xfff00000) | (va & 0x000fffff);
return ERROR_OK;
+ } else if ((first_lvl_descriptor & 0x40002) == 0x40002) {
+ /* supersection descriptor */
+ if (first_lvl_descriptor & 0x00f001e0) {
+ LOG_ERROR("Physical address does not fit into 32 bits");
+ return ERROR_TARGET_TRANSLATION_FAULT;
+ }
+ *val = (first_lvl_descriptor & 0xff000000) | (va & 0x00ffffff);
+ return ERROR_OK;
}
- if ((first_lvl_descriptor & 0x3) == 1) {
- /* coarse page table */
- retval = armv7a->armv7a_mmu.read_physical_memory(target,
- (first_lvl_descriptor & 0xfffffc00) | ((va & 0x000ff000) >> 10),
- 4, 1, (uint8_t *)&second_lvl_descriptor);
- if (retval != ERROR_OK)
- return retval;
- } else if ((first_lvl_descriptor & 0x3) == 3) {
- /* fine page table */
- retval = armv7a->armv7a_mmu.read_physical_memory(target,
- (first_lvl_descriptor & 0xfffff000) | ((va & 0x000ffc00) >> 8),
- 4, 1, (uint8_t *)&second_lvl_descriptor);
- if (retval != ERROR_OK)
- return retval;
- }
+ /* page table */
+ retval = armv7a->armv7a_mmu.read_physical_memory(target,
+ (first_lvl_descriptor & 0xfffffc00) | ((va & 0x000ff000) >> 10),
+ 4, 1, (uint8_t *)&second_lvl_descriptor);
+ if (retval != ERROR_OK)
+ return retval;
second_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
&second_lvl_descriptor);
if ((second_lvl_descriptor & 0x3) == 1) {
/* large page descriptor */
*val = (second_lvl_descriptor & 0xffff0000) | (va & 0x0000ffff);
- return ERROR_OK;
- }
-
- if ((second_lvl_descriptor & 0x3) == 2) {
+ } else {
/* small page descriptor */
*val = (second_lvl_descriptor & 0xfffff000) | (va & 0x00000fff);
- return ERROR_OK;
- }
-
- if ((second_lvl_descriptor & 0x3) == 3) {
- *val = (second_lvl_descriptor & 0xfffffc00) | (va & 0x000003ff);
- return ERROR_OK;
}
- /* should not happen */
- LOG_ERROR("Address translation failure");
- return ERROR_TARGET_TRANSLATION_FAULT;
+ return ERROR_OK;
done:
return retval;
{
struct target *target = get_current_target(CMD_CTX);
uint32_t base, way;
- switch (CMD_ARGC) {
- case 0:
- return ERROR_COMMAND_SYNTAX_ERROR;
- break;
- case 2:
- /* command_print(CMD_CTX, "%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);
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
+
+ if (CMD_ARGC != 2)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ /* command_print(CMD_CTX, "%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;
}
projects / fw / openocd / blobdiff