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>
diff --git a/arch/mips/include/asm/bootinfo.h b/arch/mips/include/asm/bootinfo.h
index 4d2cdea..83a4db4e 100644
--- a/arch/mips/include/asm/bootinfo.h
+++ b/arch/mips/include/asm/bootinfo.h
@@ -112,6 +112,8 @@
extern void free_init_pages(const char *what,
unsigned long begin, unsigned long end);
+extern void (*free_init_pages_eva)(void *begin, void *end);
+
/*
* Initial kernel command line, usually setup by prom_init()
*/
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 6b59617..4fc74c7 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -422,10 +422,20 @@
}
#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
