lib: sbi: Print scratch size and usage at boot time

The scratch space being a scarce resource so let us print it's
size and usage at boot time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>

diff --git a/include/sbi/sbi_scratch.h b/include/sbi/sbi_scratch.h
index 9894c70..4801492 100644 (file)
--- a/include/sbi/sbi_scratch.h
+++ b/include/sbi/sbi_scratch.h
@@ -175,6 +175,9 @@ unsigned long sbi_scratch_alloc_offset(unsigned long size);
 /** Free-up extra space in sbi_scratch */
 void sbi_scratch_free_offset(unsigned long offset);
 
+/** Amount (in bytes) of used space in in sbi_scratch */
+unsigned long sbi_scratch_used_space(void);
+
 /** Get pointer from offset in sbi_scratch */
 #define sbi_scratch_offset_ptr(scratch, offset)        (void *)((char *)(scratch) + (offset))
 

diff --git a/lib/sbi/sbi_init.c b/lib/sbi/sbi_init.c
index a170525..423e6d8 100644 (file)
--- a/lib/sbi/sbi_init.c
+++ b/lib/sbi/sbi_init.c
@@ -128,6 +128,11 @@ static void sbi_boot_print_general(struct sbi_scratch *scratch)
                   (u32)(sbi_heap_reserved_space() / 1024),
                   (u32)(sbi_heap_used_space() / 1024),
                   (u32)(sbi_heap_free_space() / 1024));
+       sbi_printf("Firmware Scratch Size     : "
+                  "%d B (total), %d B (used), %d B (free)\n",
+                  SBI_SCRATCH_SIZE,
+                  (u32)sbi_scratch_used_space(),
+                  (u32)(SBI_SCRATCH_SIZE - sbi_scratch_used_space()));
 
        /* SBI details */
        sbi_printf("Runtime SBI Version       : %d.%d\n",

diff --git a/lib/sbi/sbi_scratch.c b/lib/sbi/sbi_scratch.c
index 55ebdbb..87ef84c 100644 (file)
--- a/lib/sbi/sbi_scratch.c
+++ b/lib/sbi/sbi_scratch.c
@@ -97,3 +97,14 @@ void sbi_scratch_free_offset(unsigned long offset)
         * brain-dead allocator.
         */
 }
+
+unsigned long sbi_scratch_used_space(void)
+{
+       unsigned long ret = 0;
+
+       spin_lock(&extra_lock);
+       ret = extra_offset;
+       spin_unlock(&extra_lock);
+
+       return ret;
+}