ARM: OMAP: PM: Add support to allocate the memory for secure RAM
Allocate the memory to save secure ram context which needs
to be done when MPU is hitting OFF mode.
The ROM code expects a physical address to this memory
and hence use memblock APIs to reserve this memory as part
of .reserve() callback. Maximum size as per secure RAM requirements
is allocated.
To keep omap1 build working, omap-secure.h file is created
under plat-omap directory.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Vishwanath BS <vishwanath.bs@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
diff --git a/arch/arm/mach-omap2/omap-secure.c b/arch/arm/mach-omap2/omap-secure.c
index e5a606e5..69f3c72 100644
--- a/arch/arm/mach-omap2/omap-secure.c
+++ b/arch/arm/mach-omap2/omap-secure.c
@@ -13,11 +13,14 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/memblock.h>
#include <asm/cacheflush.h>
#include <mach/omap-secure.h>
+static phys_addr_t omap_secure_memblock_base;
+
/**
* omap_sec_dispatcher: Routine to dispatch low power secure
* service routines
@@ -50,3 +53,29 @@
return ret;
}
+
+/* Allocate the memory to save secure ram */
+int __init omap_secure_ram_reserve_memblock(void)
+{
+ phys_addr_t paddr;
+ u32 size = OMAP_SECURE_RAM_STORAGE;
+
+ size = ALIGN(size, SZ_1M);
+ paddr = memblock_alloc(size, SZ_1M);
+ if (!paddr) {
+ pr_err("%s: failed to reserve %x bytes\n",
+ __func__, size);
+ return -ENOMEM;
+ }
+ memblock_free(paddr, size);
+ memblock_remove(paddr, size);
+
+ omap_secure_memblock_base = paddr;
+
+ return 0;
+}
+
+phys_addr_t omap_secure_ram_mempool_base(void)
+{
+ return omap_secure_memblock_base;
+}