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authorMatthias Welwarsky <matthias.welwarsky@sysgo.com>2016-09-22 21:29:42 +0200
committerMatthias Welwarsky <matthias.welwarsky@sysgo.com>2017-02-10 14:18:34 +0100
commitb69750fd0ded4ee19861673106761627d88734e4 (patch)
tree41cb4edcf8dc0ee6973f79f767d75f788ebc0171
parentef263a45a272366836da10b7c42c916d43527f86 (diff)
aarch64: armv8 cache functions update
Update cache identification to match functionality present in armv7a_cache.c Change-Id: I2dc4bee80f5a22b8728334d40331c183d1406f27 Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
-rw-r--r--src/target/aarch64.c6
-rw-r--r--src/target/armv8.c301
-rw-r--r--src/target/armv8.h17
-rw-r--r--src/target/armv8_cache.c299
-rw-r--r--src/target/armv8_opcodes.h1
5 files changed, 353 insertions, 271 deletions
diff --git a/src/target/aarch64.c b/src/target/aarch64.c
index 1d2abc7..05abe6b 100644
--- a/src/target/aarch64.c
+++ b/src/target/aarch64.c
@@ -735,8 +735,10 @@ static int aarch64_post_debug_entry(struct target *target)
LOG_DEBUG("System_register: %8.8" PRIx32, aarch64->system_control_reg);
aarch64->system_control_reg_curr = aarch64->system_control_reg;
- if (armv8->armv8_mmu.armv8_cache.ctype == -1)
- armv8_identify_cache(target);
+ if (armv8->armv8_mmu.armv8_cache.info == -1) {
+ armv8_identify_cache(armv8);
+ armv8_read_mpidr(armv8);
+ }
armv8->armv8_mmu.mmu_enabled =
(aarch64->system_control_reg & 0x1U) ? 1 : 0;
diff --git a/src/target/armv8.c b/src/target/armv8.c
index 306a06e..467c771 100644
--- a/src/target/armv8.c
+++ b/src/target/armv8.c
@@ -37,6 +37,8 @@
#include "target.h"
#include "target_type.h"
+#define __unused __attribute__((unused))
+
static const char * const armv8_state_strings[] = {
"AArch32", "Thumb", "Jazelle", "ThumbEE", "AArch64",
};
@@ -208,6 +210,38 @@ static int armv8_write_core_reg(struct target *target, struct reg *r,
return ERROR_OK;
}
#endif
+
+/* retrieve core id cluster id */
+int armv8_read_mpidr(struct armv8_common *armv8)
+{
+ int retval = ERROR_FAIL;
+ struct arm_dpm *dpm = armv8->arm.dpm;
+ uint32_t mpidr;
+
+ retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ goto done;
+
+ retval = dpm->instr_read_data_r0(dpm, armv8_opcode(armv8, READ_REG_MPIDR), &mpidr);
+ if (retval != ERROR_OK)
+ goto done;
+ if (mpidr & 1<<31) {
+ armv8->multi_processor_system = (mpidr >> 30) & 1;
+ armv8->cluster_id = (mpidr >> 8) & 0xf;
+ armv8->cpu_id = mpidr & 0x3;
+ LOG_INFO("%s cluster %x core %x %s", target_name(armv8->arm.target),
+ armv8->cluster_id,
+ armv8->cpu_id,
+ armv8->multi_processor_system == 0 ? "multi core" : "mono core");
+
+ } else
+ LOG_ERROR("mpdir not in multiprocessor format");
+
+done:
+ dpm->finish(dpm);
+ return retval;
+}
+
/**
* Configures host-side ARM records to reflect the specified CPSR.
* Later, code can use arm_reg_current() to map register numbers
@@ -368,7 +402,7 @@ static uint8_t armv8_pa_size(uint32_t ps)
return ret;
}
-static int armv8_read_ttbcr32(struct target *target)
+static __unused int armv8_read_ttbcr32(struct target *target)
{
struct armv8_common *armv8 = target_to_armv8(target);
struct arm_dpm *dpm = armv8->arm.dpm;
@@ -528,103 +562,10 @@ int armv8_mmu_translate_va_pa(struct target *target, target_addr_t va,
return ERROR_OK;
}
-static int armv8_handle_inner_cache_info_command(struct command_context *cmd_ctx,
- struct armv8_cache_common *armv8_cache)
-{
- if (armv8_cache->ctype == -1) {
- command_print(cmd_ctx, "cache not yet identified");
- return ERROR_OK;
- }
-
- command_print(cmd_ctx,
- "D-Cache: linelen %" PRIi32 ", associativity %" PRIi32 ", nsets %" PRIi32 ", cachesize %" PRId32 " KBytes",
- armv8_cache->d_u_size.linelen,
- armv8_cache->d_u_size.associativity,
- armv8_cache->d_u_size.nsets,
- armv8_cache->d_u_size.cachesize);
-
- command_print(cmd_ctx,
- "I-Cache: linelen %" PRIi32 ", associativity %" PRIi32 ", nsets %" PRIi32 ", cachesize %" PRId32 " KBytes",
- armv8_cache->i_size.linelen,
- armv8_cache->i_size.associativity,
- armv8_cache->i_size.nsets,
- armv8_cache->i_size.cachesize);
-
- return ERROR_OK;
-}
-
-static int _armv8_flush_all_data(struct target *target)
-{
- struct armv8_common *armv8 = target_to_armv8(target);
- struct arm_dpm *dpm = armv8->arm.dpm;
- struct armv8_cachesize *d_u_size =
- &(armv8->armv8_mmu.armv8_cache.d_u_size);
- int32_t c_way, c_index = d_u_size->index;
- int retval;
- /* check that cache data is on at target halt */
- if (!armv8->armv8_mmu.armv8_cache.d_u_cache_enabled) {
- LOG_INFO("flushed not performed :cache not on at target halt");
- return ERROR_OK;
- }
- retval = dpm->prepare(dpm);
- if (retval != ERROR_OK)
- goto done;
- do {
- c_way = d_u_size->way;
- do {
- uint32_t value = (c_index << d_u_size->index_shift)
- | (c_way << d_u_size->way_shift);
- /* DCCISW */
- /* LOG_INFO ("%d %d %x",c_way,c_index,value); */
- retval = dpm->instr_write_data_r0(dpm,
- ARMV8_MSR_GP(SYSTEM_DCCISW, 0),
- value);
- if (retval != ERROR_OK)
- goto done;
- c_way -= 1;
- } while (c_way >= 0);
- c_index -= 1;
- } while (c_index >= 0);
- return retval;
-done:
- LOG_ERROR("flushed failed");
- dpm->finish(dpm);
- return retval;
-}
-
-static int armv8_flush_all_data(struct target *target)
-{
- int retval = ERROR_FAIL;
- /* check that armv8_cache is correctly identify */
- struct armv8_common *armv8 = target_to_armv8(target);
- if (armv8->armv8_mmu.armv8_cache.ctype == -1) {
- LOG_ERROR("trying to flush un-identified cache");
- return retval;
- }
-
- if (target->smp) {
- /* look if all the other target have been flushed in order to flush level
- * 2 */
- struct target_list *head;
- struct target *curr;
- head = target->head;
- while (head != (struct target_list *)NULL) {
- curr = head->target;
- if (curr->state == TARGET_HALTED) {
- LOG_INFO("Wait flushing data l1 on core %" PRId32, curr->coreid);
- retval = _armv8_flush_all_data(curr);
- }
- head = head->next;
- }
- } else
- retval = _armv8_flush_all_data(target);
- return retval;
-}
-
int armv8_handle_cache_info_command(struct command_context *cmd_ctx,
struct armv8_cache_common *armv8_cache)
{
- if (armv8_cache->ctype == -1) {
+ if (armv8_cache->info == -1) {
command_print(cmd_ctx, "cache not yet identified");
return ERROR_OK;
}
@@ -634,174 +575,6 @@ int armv8_handle_cache_info_command(struct command_context *cmd_ctx,
return ERROR_OK;
}
-/* retrieve core id cluster id */
-static int armv8_read_mpidr(struct target *target)
-{
- int retval = ERROR_FAIL;
- struct armv8_common *armv8 = target_to_armv8(target);
- struct arm_dpm *dpm = armv8->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, armv8_opcode(armv8, READ_REG_MPIDR), &mpidr);
- if (retval != ERROR_OK)
- goto done;
- if (mpidr & 1<<31) {
- armv8->multi_processor_system = (mpidr >> 30) & 1;
- armv8->cluster_id = (mpidr >> 8) & 0xf;
- armv8->cpu_id = mpidr & 0x3;
- LOG_INFO("%s cluster %x core %x %s", target_name(target),
- armv8->cluster_id,
- armv8->cpu_id,
- armv8->multi_processor_system == 0 ? "multi core" : "mono core");
-
- } else
- LOG_ERROR("mpdir not in multiprocessor format");
-
-done:
- dpm->finish(dpm);
- return retval;
-
-
-}
-
-int armv8_identify_cache(struct target *target)
-{
- /* read cache descriptor */
- int retval = ERROR_FAIL;
- struct armv8_common *armv8 = target_to_armv8(target);
- struct arm_dpm *dpm = armv8->arm.dpm;
- uint32_t cache_selected, clidr;
- uint32_t cache_i_reg, cache_d_reg;
- struct armv8_cache_common *cache = &(armv8->armv8_mmu.armv8_cache);
- int is_aarch64 = armv8->arm.core_state == ARM_STATE_AARCH64;
-
- retval = is_aarch64 ? armv8_read_ttbcr(target) : armv8_read_ttbcr32(target);
- if (retval != ERROR_OK)
- return retval;
-
- retval = dpm->prepare(dpm);
- if (retval != ERROR_OK)
- goto done;
-
- /* retrieve CLIDR */
- retval = dpm->instr_read_data_r0(dpm, armv8_opcode(armv8, READ_REG_CLIDR), &clidr);
- if (retval != ERROR_OK)
- goto done;
-
- clidr = (clidr & 0x7000000) >> 23;
- LOG_INFO("number of cache level %" PRIx32, (uint32_t)(clidr / 2));
- if ((clidr / 2) > 1) {
- /* FIXME not supported present in cortex A8 and later */
- /* in cortex A7, A15 */
- LOG_ERROR("cache l2 present :not supported");
- }
- /* retrieve selected cache*/
- retval = dpm->instr_read_data_r0(dpm, armv8_opcode(armv8, READ_REG_CSSELR), &cache_selected);
- if (retval != ERROR_OK)
- goto done;
-
- /* select instruction cache
- * [0] : 1 instruction cache selection , 0 data cache selection */
- retval = dpm->instr_write_data_r0(dpm, armv8_opcode(armv8, WRITE_REG_CSSELR), 1);
- if (retval != ERROR_OK)
- goto done;
-
- /* read CCSIDR
- * MRC P15,1,<RT>,C0, C0,0 ;on cortex A9 read CCSIDR
- * [2:0] line size 001 eight word per line
- * [27:13] NumSet 0x7f 16KB, 0xff 32Kbytes, 0x1ff 64Kbytes */
- retval = dpm->instr_read_data_r0(dpm, armv8_opcode(armv8, READ_REG_CCSIDR), &cache_i_reg);
- if (retval != ERROR_OK)
- goto done;
-
- /* select data cache*/
- retval = dpm->instr_write_data_r0(dpm, armv8_opcode(armv8, WRITE_REG_CSSELR), 0);
- if (retval != ERROR_OK)
- goto done;
-
- retval = dpm->instr_read_data_r0(dpm, armv8_opcode(armv8, READ_REG_CCSIDR), &cache_d_reg);
- if (retval != ERROR_OK)
- goto done;
-
- /* restore selected cache */
- dpm->instr_write_data_r0(dpm, armv8_opcode(armv8, WRITE_REG_CSSELR), cache_selected);
- if (retval != ERROR_OK)
- goto done;
- dpm->finish(dpm);
-
- /* put fake type */
- cache->d_u_size.linelen = 16 << (cache_d_reg & 0x7);
- cache->d_u_size.cachesize = (((cache_d_reg >> 13) & 0x7fff)+1)/8;
- cache->d_u_size.nsets = (cache_d_reg >> 13) & 0x7fff;
- cache->d_u_size.associativity = ((cache_d_reg >> 3) & 0x3ff) + 1;
- /* compute info for set way operation on cache */
- cache->d_u_size.index_shift = (cache_d_reg & 0x7) + 4;
- cache->d_u_size.index = (cache_d_reg >> 13) & 0x7fff;
- cache->d_u_size.way = ((cache_d_reg >> 3) & 0x3ff);
- cache->d_u_size.way_shift = cache->d_u_size.way + 1;
- {
- int i = 0;
- while (((cache->d_u_size.way_shift >> i) & 1) != 1)
- i++;
- cache->d_u_size.way_shift = 32-i;
- }
-#if 0
- LOG_INFO("data cache index %d << %d, way %d << %d",
- cache->d_u_size.index, cache->d_u_size.index_shift,
- cache->d_u_size.way,
- cache->d_u_size.way_shift);
-
- LOG_INFO("data cache %d bytes %d KBytes asso %d ways",
- cache->d_u_size.linelen,
- cache->d_u_size.cachesize,
- cache->d_u_size.associativity);
-#endif
- cache->i_size.linelen = 16 << (cache_i_reg & 0x7);
- cache->i_size.associativity = ((cache_i_reg >> 3) & 0x3ff) + 1;
- cache->i_size.nsets = (cache_i_reg >> 13) & 0x7fff;
- cache->i_size.cachesize = (((cache_i_reg >> 13) & 0x7fff)+1)/8;
- /* compute info for set way operation on cache */
- cache->i_size.index_shift = (cache_i_reg & 0x7) + 4;
- cache->i_size.index = (cache_i_reg >> 13) & 0x7fff;
- cache->i_size.way = ((cache_i_reg >> 3) & 0x3ff);
- cache->i_size.way_shift = cache->i_size.way + 1;
- {
- int i = 0;
- while (((cache->i_size.way_shift >> i) & 1) != 1)
- i++;
- cache->i_size.way_shift = 32-i;
- }
-#if 0
- LOG_INFO("instruction cache index %d << %d, way %d << %d",
- cache->i_size.index, cache->i_size.index_shift,
- cache->i_size.way, cache->i_size.way_shift);
-
- LOG_INFO("instruction cache %d bytes %d KBytes asso %d ways",
- cache->i_size.linelen,
- cache->i_size.cachesize,
- cache->i_size.associativity);
-#endif
- /* if no l2 cache initialize l1 data cache flush function function */
- if (armv8->armv8_mmu.armv8_cache.flush_all_data_cache == NULL) {
- armv8->armv8_mmu.armv8_cache.display_cache_info =
- armv8_handle_inner_cache_info_command;
- armv8->armv8_mmu.armv8_cache.flush_all_data_cache =
- armv8_flush_all_data;
- }
- armv8->armv8_mmu.armv8_cache.ctype = 0;
-
-done:
- dpm->finish(dpm);
- armv8_read_mpidr(target);
- return retval;
-
-}
-
int armv8_init_arch_info(struct target *target, struct armv8_common *armv8)
{
struct arm *arm = &armv8->arm;
@@ -818,7 +591,7 @@ int armv8_init_arch_info(struct target *target, struct armv8_common *armv8)
#endif
armv8->armv8_mmu.armv8_cache.l2_cache = NULL;
- armv8->armv8_mmu.armv8_cache.ctype = -1;
+ armv8->armv8_mmu.armv8_cache.info = -1;
armv8->armv8_mmu.armv8_cache.flush_all_data_cache = NULL;
armv8->armv8_mmu.armv8_cache.display_cache_info = NULL;
return ERROR_OK;
diff --git a/src/target/armv8.h b/src/target/armv8.h
index fa3674b..2862ebd 100644
--- a/src/target/armv8.h
+++ b/src/target/armv8.h
@@ -97,12 +97,22 @@ struct armv8_cachesize {
uint32_t way_shift;
};
-struct armv8_cache_common {
- int ctype;
+/* information about one architecture cache at any level */
+struct armv8_arch_cache {
+ int ctype; /* cache type, CLIDR encoding */
struct armv8_cachesize d_u_size; /* data cache */
struct armv8_cachesize i_size; /* instruction cache */
+};
+
+struct armv8_cache_common {
+ int info;
+ int loc;
+ uint32_t iminline;
+ uint32_t dminline;
+ struct armv8_arch_cache arch[6]; /* cache info, L1 - L7 */
int i_cache_enabled;
int d_u_cache_enabled;
+
/* l2 external unified cache if some */
void *l2_cache;
int (*flush_all_data_cache)(struct target *target);
@@ -249,7 +259,8 @@ target_to_armv8(struct target *target)
#define PAGE_SIZE_4KB_TRBBASE_MASK 0xFFFFFFFFF000
int armv8_arch_state(struct target *target);
-int armv8_identify_cache(struct target *target);
+int armv8_read_mpidr(struct armv8_common *armv8);
+int armv8_identify_cache(struct armv8_common *armv8);
int armv8_init_arch_info(struct target *target, struct armv8_common *armv8);
int armv8_mmu_translate_va_pa(struct target *target, target_addr_t va,
target_addr_t *val, int meminfo);
diff --git a/src/target/armv8_cache.c b/src/target/armv8_cache.c
index fb18804..f496c3c 100644
--- a/src/target/armv8_cache.c
+++ b/src/target/armv8_cache.c
@@ -24,6 +24,11 @@
#include "armv8_dpm.h"
#include "armv8_opcodes.h"
+/* CLIDR cache types */
+#define CACHE_LEVEL_HAS_UNIFIED_CACHE 0x4
+#define CACHE_LEVEL_HAS_D_CACHE 0x2
+#define CACHE_LEVEL_HAS_I_CACHE 0x1
+
static int armv8_d_cache_sanity_check(struct armv8_common *armv8)
{
struct armv8_cache_common *armv8_cache = &armv8->armv8_mmu.armv8_cache;
@@ -44,11 +49,72 @@ static int armv8_i_cache_sanity_check(struct armv8_common *armv8)
return ERROR_TARGET_INVALID;
}
+static int armv8_cache_d_inner_flush_level(struct arm_dpm *dpm, struct armv8_cachesize *size, int cl)
+{
+ int retval = ERROR_OK;
+ int32_t c_way, c_index = size->index;
+
+ LOG_DEBUG("cl %" PRId32, cl);
+ do {
+ c_way = size->way;
+ do {
+ uint32_t value = (c_index << size->index_shift)
+ | (c_way << size->way_shift) | (cl << 1);
+ /*
+ * DC CISW - Clean and invalidate data cache
+ * line by Set/Way.
+ */
+ retval = dpm->instr_write_data_r0(dpm,
+ ARMV8_SYS(SYSTEM_DCCISW, 0), value);
+ if (retval != ERROR_OK)
+ goto done;
+ c_way -= 1;
+ } while (c_way >= 0);
+ c_index -= 1;
+ } while (c_index >= 0);
+
+ done:
+ return retval;
+}
+
+static int armv8_cache_d_inner_clean_inval_all(struct armv8_common *armv8)
+{
+ struct armv8_cache_common *cache = &(armv8->armv8_mmu.armv8_cache);
+ struct arm_dpm *dpm = armv8->arm.dpm;
+ int cl;
+ int retval;
+
+ retval = armv8_d_cache_sanity_check(armv8);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ goto done;
+
+ for (cl = 0; cl < cache->loc; cl++) {
+ /* skip i-only caches */
+ if (cache->arch[cl].ctype < CACHE_LEVEL_HAS_D_CACHE)
+ continue;
+
+ armv8_cache_d_inner_flush_level(dpm, &cache->arch[cl].d_u_size, cl);
+ }
+
+ retval = dpm->finish(dpm);
+ return retval;
+
+done:
+ LOG_ERROR("clean invalidate failed");
+ dpm->finish(dpm);
+
+ return retval;
+}
+
int armv8_cache_d_inner_flush_virt(struct armv8_common *armv8, target_addr_t va, size_t size)
{
struct arm_dpm *dpm = armv8->arm.dpm;
struct armv8_cache_common *armv8_cache = &armv8->armv8_mmu.armv8_cache;
- uint64_t linelen = armv8_cache->d_u_size.linelen;
+ uint64_t linelen = armv8_cache->dminline;
target_addr_t va_line, va_end;
int retval;
@@ -87,7 +153,7 @@ int armv8_cache_i_inner_inval_virt(struct armv8_common *armv8, target_addr_t va,
{
struct arm_dpm *dpm = armv8->arm.dpm;
struct armv8_cache_common *armv8_cache = &armv8->armv8_mmu.armv8_cache;
- uint64_t linelen = armv8_cache->i_size.linelen;
+ uint64_t linelen = armv8_cache->iminline;
target_addr_t va_line, va_end;
int retval;
@@ -120,3 +186,232 @@ done:
return retval;
}
+
+static int armv8_handle_inner_cache_info_command(struct command_context *cmd_ctx,
+ struct armv8_cache_common *armv8_cache)
+{
+ int cl;
+
+ if (armv8_cache->info == -1) {
+ command_print(cmd_ctx, "cache not yet identified");
+ return ERROR_OK;
+ }
+
+ for (cl = 0; cl < armv8_cache->loc; cl++) {
+ struct armv8_arch_cache *arch = &(armv8_cache->arch[cl]);
+
+ if (arch->ctype & 1) {
+ command_print(cmd_ctx,
+ "L%d I-Cache: linelen %" PRIi32
+ ", associativity %" PRIi32
+ ", nsets %" PRIi32
+ ", cachesize %" PRId32 " 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_ctx,
+ "L%d D-Cache: linelen %" PRIi32
+ ", associativity %" PRIi32
+ ", nsets %" PRIi32
+ ", cachesize %" PRId32 " KBytes",
+ cl+1,
+ arch->d_u_size.linelen,
+ arch->d_u_size.associativity,
+ arch->d_u_size.nsets,
+ arch->d_u_size.cachesize);
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static int _armv8_flush_all_data(struct target *target)
+{
+ return armv8_cache_d_inner_clean_inval_all(target_to_armv8(target));
+}
+
+static int armv8_flush_all_data(struct target *target)
+{
+ int retval = ERROR_FAIL;
+ /* check that armv8_cache is correctly identify */
+ struct armv8_common *armv8 = target_to_armv8(target);
+ if (armv8->armv8_mmu.armv8_cache.info == -1) {
+ LOG_ERROR("trying to flush un-identified cache");
+ return retval;
+ }
+
+ if (target->smp) {
+ /* look if all the other target have been flushed in order to flush level
+ * 2 */
+ struct target_list *head;
+ struct target *curr;
+ head = target->head;
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ if (curr->state == TARGET_HALTED) {
+ LOG_INFO("Wait flushing data l1 on core %" PRId32, curr->coreid);
+ retval = _armv8_flush_all_data(curr);
+ }
+ head = head->next;
+ }
+ } else
+ retval = _armv8_flush_all_data(target);
+ 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,
+ ARMV8_MSR_GP(SYSTEM_CSSELR, 0),
+ (cl << 1) | (ct == 1 ? 1 : 0));
+ if (retval != ERROR_OK)
+ goto done;
+
+ retval = dpm->instr_read_data_r0(dpm,
+ ARMV8_MRS(SYSTEM_CCSIDR, 0),
+ cache_reg);
+ done:
+ return retval;
+}
+
+static struct armv8_cachesize decode_cache_reg(uint32_t cache_reg)
+{
+ struct armv8_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 armv8_identify_cache(struct armv8_common *armv8)
+{
+ /* read cache descriptor */
+ int retval = ERROR_FAIL;
+ struct arm_dpm *dpm = armv8->arm.dpm;
+ uint32_t csselr, clidr, ctr;
+ uint32_t cache_reg;
+ int cl, ctype;
+ struct armv8_cache_common *cache = &(armv8->armv8_mmu.armv8_cache);
+
+ retval = dpm->prepare(dpm);
+ if (retval != ERROR_OK)
+ goto done;
+
+ /* retrieve CTR */
+ retval = dpm->instr_read_data_r0(dpm, ARMV8_MRS(SYSTEM_CTR, 0), &ctr);
+ if (retval != ERROR_OK)
+ goto done;
+
+ cache->iminline = 4UL << (ctr & 0xf);
+ cache->dminline = 4UL << ((ctr & 0xf0000) >> 16);
+ LOG_DEBUG("ctr %" PRIx32 " ctr.iminline %" PRId32 " ctr.dminline %" PRId32,
+ ctr, cache->iminline, cache->dminline);
+
+ /* retrieve CLIDR */
+ retval = dpm->instr_read_data_r0(dpm, ARMV8_MRS(SYSTEM_CLIDR, 0), &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, ARMV8_MRS(SYSTEM_CSSELR, 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 %d << %d, way %d << %d",
+ 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 %d bytes %d KBytes asso %d 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 %d << %d, way %d << %d",
+ 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 %d bytes %d KBytes asso %d 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, ARMV8_MSR_GP(SYSTEM_CSSELR, 0), csselr);
+ if (retval != ERROR_OK)
+ goto done;
+
+ armv8->armv8_mmu.armv8_cache.info = 1;
+
+ /* if no l2 cache initialize l1 data cache flush function function */
+ if (armv8->armv8_mmu.armv8_cache.flush_all_data_cache == NULL) {
+ armv8->armv8_mmu.armv8_cache.display_cache_info =
+ armv8_handle_inner_cache_info_command;
+ armv8->armv8_mmu.armv8_cache.flush_all_data_cache =
+ armv8_flush_all_data;
+ }
+
+done:
+ dpm->finish(dpm);
+ return retval;
+
+}
diff --git a/src/target/armv8_opcodes.h b/src/target/armv8_opcodes.h
index 9f5ebf8..51dc15a 100644
--- a/src/target/armv8_opcodes.h
+++ b/src/target/armv8_opcodes.h
@@ -77,6 +77,7 @@
#define SYSTEM_CLIDR 0b1100100000000001
#define SYSTEM_CSSELR 0b1101000000000000
#define SYSTEM_CTYPE 0b1101100000000001
+#define SYSTEM_CTR 0b1101100000000001
#define SYSTEM_DCCISW 0b0100001111110010
#define SYSTEM_DCCSW 0b0100001111010010