MIPS: mm: init: Add free_init_pages() callback for EVA

A core in EVA mode can have any possible segment mapping, so the
default free_initmem_default() function may not always work as expected.
Therefore, add a callback that platforms can use to free up the init section.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 6b59617760c1..4fc74c78265a 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -422,10 +422,20 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 }
 #endif
 
+void (*free_init_pages_eva)(void *begin, void *end) = NULL;
+
 void __init_refok free_initmem(void)
 {
         prom_free_prom_memory();
-        free_initmem_default(POISON_FREE_INITMEM);
+        /*
+         * Let the platform define a specific function to free the
+         * init section since EVA may have used any possible mapping
+         * between virtual and physical addresses.
+         */
+        if (free_init_pages_eva)
+                free_init_pages_eva((void *)&__init_begin, (void *)&__init_end);
+        else
+                free_initmem_default(POISON_FREE_INITMEM);
 }
 
 #ifndef CONFIG_MIPS_PGD_C0_CONTEXT