Tegra: enable 'signed-comparison' compilation warning/errors

This patch enables the 'sign-compare' flag, to enable warning/errors
for comparisons between signed/unsigned variables. The warning has
been enabled for all the Tegra platforms, to start with.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

15 files changed, 37 insertions, 32 deletions

diff --git a/common/runtime_svc.c b/common/runtime_svc.c
index 7b38847b..0ea4cd09 100644
--- a/common/runtime_svc.c
+++ b/common/runtime_svc.c
@@ -36,15 +36,16 @@ uintptr_t handle_runtime_svc(uint32_t smc_fid,
 			     unsigned int flags)
 {
 	u_register_t x1, x2, x3, x4;
-	int index, idx;
+	int index;
+	unsigned int idx;
 	const rt_svc_desc_t *rt_svc_descs;
 
 	assert(handle);
 	idx = get_unique_oen_from_smc_fid(smc_fid);
-	assert(idx >= 0 && idx < MAX_RT_SVCS);
+	assert(idx < MAX_RT_SVCS);
 
 	index = rt_svc_descs_indices[idx];
-	if (index < 0 || index >= RT_SVC_DECS_NUM)
+	if (index < 0 || index >= (int)RT_SVC_DECS_NUM)
 		SMC_RET1(handle, SMC_UNK);
 
 	rt_svc_descs = (rt_svc_desc_t *) RT_SVC_DESCS_START;
@@ -89,7 +90,8 @@ static int32_t validate_rt_svc_desc(const rt_svc_desc_t *desc)
  ******************************************************************************/
 void runtime_svc_init(void)
 {
-	int rc = 0, index, start_idx, end_idx;
+	int rc = 0;
+	unsigned int index, start_idx, end_idx;
 
 	/* Assert the number of descriptors detected are less than maximum indices */
 	assert((RT_SVC_DESCS_END >= RT_SVC_DESCS_START) &&
diff --git a/lib/cpus/errata_report.c b/lib/cpus/errata_report.c
index 4d9757e0..1e1fc786 100644
--- a/lib/cpus/errata_report.c
+++ b/lib/cpus/errata_report.c
@@ -60,7 +60,7 @@ int errata_needs_reporting(spinlock_t *lock, uint32_t *reported)
  * Applied: INFO
  * Not applied: VERBOSE
  */
-void errata_print_msg(int status, const char *cpu, const char *id)
+void errata_print_msg(unsigned int status, const char *cpu, const char *id)
 {
 	/* Errata status strings */
 	static const char *const errata_status_str[] = {
diff --git a/lib/psci/psci_common.c b/lib/psci/psci_common.c
index 763de046..f31b3238 100644
--- a/lib/psci/psci_common.c
+++ b/lib/psci/psci_common.c
@@ -332,7 +332,7 @@ void psci_get_parent_pwr_domain_nodes(unsigned int cpu_idx,
 				      unsigned int node_index[])
 {
 	unsigned int parent_node = psci_cpu_pd_nodes[cpu_idx].parent_node;
-	int i;
+	unsigned int i;
 
 	for (i = PSCI_CPU_PWR_LVL + 1; i <= end_lvl; i++) {
 		*node_index++ = parent_node;
@@ -901,7 +901,7 @@ void psci_print_power_domain_map(void)
  *****************************************************************************/
 int psci_secondaries_brought_up(void)
 {
-	int idx, n_valid = 0;
+	unsigned int idx, n_valid = 0;
 
 	for (idx = 0; idx < ARRAY_SIZE(psci_cpu_pd_nodes); idx++) {
 		if (psci_cpu_pd_nodes[idx].mpidr != PSCI_INVALID_MPIDR)
diff --git a/lib/psci/psci_main.c b/lib/psci/psci_main.c
index 2a6644b6..257479aa 100644
--- a/lib/psci/psci_main.c
+++ b/lib/psci/psci_main.c
@@ -209,7 +209,7 @@ int psci_cpu_off(void)
 int psci_affinity_info(u_register_t target_affinity,
 		       unsigned int lowest_affinity_level)
 {
-	unsigned int target_idx;
+	int target_idx;
 
 	/* We dont support level higher than PSCI_CPU_PWR_LVL */
 	if (lowest_affinity_level > PSCI_CPU_PWR_LVL)
diff --git a/lib/psci/psci_off.c b/lib/psci/psci_off.c
index 8be44c31..e7fb6532 100644
--- a/lib/psci/psci_off.c
+++ b/lib/psci/psci_off.c
@@ -19,7 +19,7 @@
  ******************************************************************************/
 static void psci_set_power_off_state(psci_power_state_t *state_info)
 {
-	int lvl;
+	unsigned int lvl;
 
 	for (lvl = PSCI_CPU_PWR_LVL; lvl <= PLAT_MAX_PWR_LVL; lvl++)
 		state_info->pwr_domain_state[lvl] = PLAT_MAX_OFF_STATE;
diff --git a/lib/xlat_tables_v2/xlat_tables_internal.c b/lib/xlat_tables_v2/xlat_tables_internal.c
index 2d556e65..e1a252be 100644
--- a/lib/xlat_tables_v2/xlat_tables_internal.c
+++ b/lib/xlat_tables_v2/xlat_tables_internal.c
@@ -37,7 +37,7 @@
  */
 static int xlat_table_get_index(xlat_ctx_t *ctx, const uint64_t *table)
 {
-	for (int i = 0; i < ctx->tables_num; i++)
+	for (unsigned int i = 0; i < ctx->tables_num; i++)
 		if (ctx->tables[i] == table)
 			return i;
 
@@ -53,7 +53,7 @@ static int xlat_table_get_index(xlat_ctx_t *ctx, const uint64_t *table)
 /* Returns a pointer to an empty translation table. */
 static uint64_t *xlat_table_get_empty(xlat_ctx_t *ctx)
 {
-	for (int i = 0; i < ctx->tables_num; i++)
+	for (unsigned int i = 0; i < ctx->tables_num; i++)
 		if (ctx->tables_mapped_regions[i] == 0)
 			return ctx->tables[i];
 
@@ -203,7 +203,7 @@ static void xlat_tables_unmap_region(xlat_ctx_t *ctx, mmap_region_t *mm,
 				     const uintptr_t table_base_va,
 				     uint64_t *const table_base,
 				     const int table_entries,
-				     const int level)
+				     const unsigned int level)
 {
 	assert(level >= ctx->base_level && level <= XLAT_TABLE_LEVEL_MAX);
 
@@ -468,7 +468,7 @@ static uintptr_t xlat_tables_map_region(xlat_ctx_t *ctx, mmap_region_t *mm,
 				   const uintptr_t table_base_va,
 				   uint64_t *const table_base,
 				   const int table_entries,
-				   const int level)
+				   const unsigned int level)
 {
 	assert(level >= ctx->base_level && level <= XLAT_TABLE_LEVEL_MAX);
 
@@ -1053,14 +1053,14 @@ void init_xlation_table(xlat_ctx_t *ctx)
 
 	/* All tables must be zeroed before mapping any region. */
 
-	for (int i = 0; i < ctx->base_table_entries; i++)
+	for (unsigned int i = 0; i < ctx->base_table_entries; i++)
 		ctx->base_table[i] = INVALID_DESC;
 
-	for (int j = 0; j < ctx->tables_num; j++) {
+	for (unsigned int j = 0; j < ctx->tables_num; j++) {
 #if PLAT_XLAT_TABLES_DYNAMIC
 		ctx->tables_mapped_regions[j] = 0;
 #endif
-		for (int i = 0; i < XLAT_TABLE_ENTRIES; i++)
+		for (unsigned int i = 0; i < XLAT_TABLE_ENTRIES; i++)
 			ctx->tables[j][i] = INVALID_DESC;
 	}
 
diff --git a/lib/xlat_tables_v2/xlat_tables_private.h b/lib/xlat_tables_v2/xlat_tables_private.h
index 7b3e555e..83e0b6ea 100644
--- a/lib/xlat_tables_v2/xlat_tables_private.h
+++ b/lib/xlat_tables_v2/xlat_tables_private.h
@@ -52,7 +52,7 @@ typedef struct {
 	 * null entry.
 	 */
 	mmap_region_t *mmap;
-	int mmap_num;
+	unsigned int mmap_num;
 
 	/*
 	 * Array of finer-grain translation tables.
@@ -60,7 +60,7 @@ typedef struct {
 	 * contain both level-2 and level-3 entries.
 	 */
 	uint64_t (*tables)[XLAT_TABLE_ENTRIES];
-	int tables_num;
+	unsigned int tables_num;
 	/*
 	 * Keep track of how many regions are mapped in each table. The base
 	 * table can't be unmapped so it isn't needed to keep track of it.
@@ -69,14 +69,14 @@ typedef struct {
 	int *tables_mapped_regions;
 #endif /* PLAT_XLAT_TABLES_DYNAMIC */
 
-	int next_table;
+	unsigned int next_table;
 
 	/*
 	 * Base translation table. It doesn't need to have the same amount of
 	 * entries as the ones used for other levels.
 	 */
 	uint64_t *base_table;
-	int base_table_entries;
+	unsigned int base_table_entries;
 
 	/*
 	 * Max Physical and Virtual addresses currently in use by the
@@ -87,10 +87,10 @@ typedef struct {
 	uintptr_t max_va;
 
 	/* Level of the base translation table. */
-	int base_level;
+	unsigned int base_level;
 
 	/* Set to 1 when the translation tables are initialized. */
-	int initialized;
+	unsigned int initialized;
 
 	/*
 	 * Bit mask that has to be ORed to the rest of a translation table
diff --git a/plat/nvidia/tegra/common/tegra_pm.c b/plat/nvidia/tegra/common/tegra_pm.c
index 94450191..6f841ef0 100644
--- a/plat/nvidia/tegra/common/tegra_pm.c
+++ b/plat/nvidia/tegra/common/tegra_pm.c
@@ -107,7 +107,7 @@ plat_local_state_t tegra_soc_get_target_pwr_state(unsigned int lvl,
 void tegra_get_sys_suspend_power_state(psci_power_state_t *req_state)
 {
 	/* all affinities use system suspend state id */
-	for (int i = MPIDR_AFFLVL0; i <= PLAT_MAX_PWR_LVL; i++)
+	for (uint32_t i = MPIDR_AFFLVL0; i <= PLAT_MAX_PWR_LVL; i++)
 		req_state->pwr_domain_state[i] = PSTATE_ID_SOC_POWERDN;
 }
 
diff --git a/plat/nvidia/tegra/platform.mk b/plat/nvidia/tegra/platform.mk
index f5af4081..eaf10914 100644
--- a/plat/nvidia/tegra/platform.mk
+++ b/plat/nvidia/tegra/platform.mk
@@ -34,3 +34,6 @@ include ${SOC_DIR}/platform_${TARGET_SOC}.mk
 
 # modify BUILD_PLAT to point to SoC specific build directory
 BUILD_PLAT	:=	${BUILD_BASE}/${PLAT}/${TARGET_SOC}/${BUILD_TYPE}
+
+# enable signed comparison checks
+CFLAGS		+= -Wsign-compare
diff --git a/plat/nvidia/tegra/soc/t132/plat_psci_handlers.c b/plat/nvidia/tegra/soc/t132/plat_psci_handlers.c
index 56ce91be..9b7dc853 100644
--- a/plat/nvidia/tegra/soc/t132/plat_psci_handlers.c
+++ b/plat/nvidia/tegra/soc/t132/plat_psci_handlers.c
@@ -49,7 +49,7 @@ int32_t tegra_soc_validate_power_state(unsigned int power_state,
 	}
 
 	/* Set lower power states to PLAT_MAX_OFF_STATE */
-	for (int i = MPIDR_AFFLVL0; i < PLAT_MAX_PWR_LVL; i++)
+	for (uint32_t i = MPIDR_AFFLVL0; i < PLAT_MAX_PWR_LVL; i++)
 		req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
 
 	/* Set the SYSTEM_SUSPEND state-id */
diff --git a/plat/nvidia/tegra/soc/t186/drivers/mce/ari.c b/plat/nvidia/tegra/soc/t186/drivers/mce/ari.c
index 4765ba00..05b30fc9 100644
--- a/plat/nvidia/tegra/soc/t186/drivers/mce/ari.c
+++ b/plat/nvidia/tegra/soc/t186/drivers/mce/ari.c
@@ -291,7 +291,7 @@ int ari_is_sc7_allowed(uint32_t ari_base, uint32_t state, uint32_t wake_time)
 
 int ari_online_core(uint32_t ari_base, uint32_t core)
 {
-	int cpu = read_mpidr() & MPIDR_CPU_MASK;
+	uint32_t cpu = read_mpidr() & MPIDR_CPU_MASK;
 	int cluster = (read_mpidr() & MPIDR_CLUSTER_MASK) >>
 			MPIDR_AFFINITY_BITS;
 	int impl = (read_midr() >> MIDR_IMPL_SHIFT) & MIDR_IMPL_MASK;
@@ -300,7 +300,7 @@ int ari_online_core(uint32_t ari_base, uint32_t core)
 	cpu |= (cluster << 2);
 
 	/* sanity check target core id */
-	if ((core >= MCE_CORE_ID_MAX) || (cpu == core)) {
+	if ((core >= (uint32_t)MCE_CORE_ID_MAX) || (cpu == core)) {
 		ERROR("%s: unsupported core id (%d)\n", __func__, core);
 		return EINVAL;
 	}
diff --git a/plat/nvidia/tegra/soc/t186/drivers/mce/nvg.c b/plat/nvidia/tegra/soc/t186/drivers/mce/nvg.c
index 0be1af1a..8c6f67c0 100644
--- a/plat/nvidia/tegra/soc/t186/drivers/mce/nvg.c
+++ b/plat/nvidia/tegra/soc/t186/drivers/mce/nvg.c
@@ -168,11 +168,11 @@ int nvg_is_sc7_allowed(uint32_t ari_base, uint32_t state, uint32_t wake_time)
 
 int nvg_online_core(uint32_t ari_base, uint32_t core)
 {
-	int cpu = read_mpidr() & MPIDR_CPU_MASK;
+	uint32_t cpu = read_mpidr() & MPIDR_CPU_MASK;
 	int impl = (read_midr() >> MIDR_IMPL_SHIFT) & MIDR_IMPL_MASK;
 
 	/* sanity check code id */
-	if ((core >= MCE_CORE_ID_MAX) || (cpu == core)) {
+	if ((core >= (uint32_t)MCE_CORE_ID_MAX) || (cpu == core)) {
 		ERROR("%s: unsupported core id (%d)\n", __func__, core);
 		return EINVAL;
 	}
diff --git a/plat/nvidia/tegra/soc/t186/plat_psci_handlers.c b/plat/nvidia/tegra/soc/t186/plat_psci_handlers.c
index 44b99dc4..095614e4 100644
--- a/plat/nvidia/tegra/soc/t186/plat_psci_handlers.c
+++ b/plat/nvidia/tegra/soc/t186/plat_psci_handlers.c
@@ -256,8 +256,8 @@ int tegra_soc_pwr_domain_power_down_wfi(const psci_power_state_t *target_state)
 
 int tegra_soc_pwr_domain_on(u_register_t mpidr)
 {
-	int target_cpu = mpidr & MPIDR_CPU_MASK;
-	int target_cluster = (mpidr & MPIDR_CLUSTER_MASK) >>
+	uint32_t target_cpu = mpidr & MPIDR_CPU_MASK;
+	uint32_t target_cluster = (mpidr & MPIDR_CLUSTER_MASK) >>
 			MPIDR_AFFINITY_BITS;
 
 	if (target_cluster > MPIDR_AFFLVL1) {
diff --git a/plat/nvidia/tegra/soc/t210/plat_psci_handlers.c b/plat/nvidia/tegra/soc/t210/plat_psci_handlers.c
index bcaade64..3dff6539 100644
--- a/plat/nvidia/tegra/soc/t210/plat_psci_handlers.c
+++ b/plat/nvidia/tegra/soc/t210/plat_psci_handlers.c
@@ -60,7 +60,7 @@ int32_t tegra_soc_validate_power_state(unsigned int power_state,
 		/*
 		 * System powerdown request only for afflvl 2
 		 */
-		for (int i = MPIDR_AFFLVL0; i < PLAT_MAX_PWR_LVL; i++)
+		for (uint32_t i = MPIDR_AFFLVL0; i < PLAT_MAX_PWR_LVL; i++)
 			req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
 
 		req_state->pwr_domain_state[PLAT_MAX_PWR_LVL] =
diff --git a/services/spd/tlkd/tlkd_main.c b/services/spd/tlkd/tlkd_main.c
index 27488683..948be5df 100644
--- a/services/spd/tlkd/tlkd_main.c
+++ b/services/spd/tlkd/tlkd_main.c
@@ -37,7 +37,7 @@ tlk_context_t tlk_ctx;
 /*******************************************************************************
  * CPU number on which TLK booted up
  ******************************************************************************/
-static int boot_cpu;
+static uint32_t boot_cpu;
 
 /* TLK UID: RFC-4122 compliant UUID (version-5, sha-1) */
 DEFINE_SVC_UUID(tlk_uuid,