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xlat lib v2: Print some debug statistics 

This patch adds some debug prints to display some statistics about page
tables usage. They are printed only if the LOG_LEVEL is at least 50
(i.e. VERBOSE).

Sample output for BL1:

VERBOSE:    Translation tables state:
VERBOSE:      Max allowed PA:  0xffffffff
VERBOSE:      Max allowed VA:  0xffffffff
VERBOSE:      Max mapped PA:   0x7fffffff
VERBOSE:      Max mapped VA:   0x7fffffff
VERBOSE:      Initial lookup level: 1
VERBOSE:      Entries @initial lookup level: 4
VERBOSE:      Used 4 sub-tables out of 5 (spare: 1)

Change-Id: If38956902e9616cdcd6065ecd140fe21482597ea
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
This commit is contained in:
Sandrine Bailleux 2017-05-26 15:47:08 +01:00
parent aa965e1583
commit 0350bc6d05
1 changed files with 24 additions and 0 deletions
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24
lib/xlat_tables_v2/xlat_tables_internal.c
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@ -1042,6 +1042,30 @@ static void xlat_tables_print_internal(const uintptr_t table_base_va,
void xlat_tables_print(xlat_ctx_t *ctx)
{
#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
VERBOSE("Translation tables state:\n");
VERBOSE(" Max allowed PA: 0x%llx\n", ctx->pa_max_address);
VERBOSE(" Max allowed VA: %p\n", (void *) ctx->va_max_address);
VERBOSE(" Max mapped PA: 0x%llx\n", ctx->max_pa);
VERBOSE(" Max mapped VA: %p\n", (void *) ctx->max_va);
VERBOSE(" Initial lookup level: %i\n", ctx->base_level);
VERBOSE(" Entries @initial lookup level: %i\n",
ctx->base_table_entries);
int used_page_tables;
#if PLAT_XLAT_TABLES_DYNAMIC
used_page_tables = 0;
for (int i = 0; i < ctx->tables_num; ++i) {
if (ctx->tables_mapped_regions[i] != 0)
++used_page_tables;
}
#else
used_page_tables = ctx->next_table;
#endif
VERBOSE(" Used %i sub-tables out of %i (spare: %i)\n",
used_page_tables, ctx->tables_num,
ctx->tables_num - used_page_tables);
xlat_tables_print_internal(0, ctx->base_table, ctx->base_table_entries,
ctx->base_level, ctx->execute_never_mask);
#endif /* LOG_LEVEL >= LOG_LEVEL_VERBOSE */