imx: hab: add mx7 secure boot support

Add mx7 secure boot support, add helper macro IS_HAB_ENABLED_BIT
to get the corresponding bit mask per SoC (mx7 or mx6) to identify
if securue boot feature is enabled/disabled.

On authenticate_image only check for mmu enabled on mx6 SoC to
force pu_irom_mmu_enabled so ROM code can perform mmu cache flush
mx7 SoC ROM code does not have this issue as ROM enables cache support
based on fuse settings.

Signed-off-by: Adrian Alonso <aalonso@freescale.com>

diff --git a/arch/arm/imx-common/hab.c b/arch/arm/imx-common/hab.c
index 277c81ef67baab3d22d3a2cf02fa050c37ac7e28..8bbcc224546311213bf1ddccda9b0cb5981e89db 100644 (file)
--- a/arch/arm/imx-common/hab.c
+++ b/arch/arm/imx-common/hab.c
@@ -81,6 +81,8 @@
 #define MX6DQ_PU_IROM_MMU_EN_VAR       0x009024a8
 #define MX6DLS_PU_IROM_MMU_EN_VAR      0x00901dd0
 #define MX6SL_PU_IROM_MMU_EN_VAR       0x00900a18
+#define IS_HAB_ENABLED_BIT \
+       (is_soc_type(MXC_SOC_MX7) ? 0x2000000 : 0x2)
 
 /*
  * +------------+  0x0 (DDR_UIMAGE_START) -
@@ -273,7 +275,7 @@ bool is_hab_enabled(void)
                return ret;
        }
 
-       return (reg & 0x2) == 0x2;
+       return (reg & IS_HAB_ENABLED_BIT) == IS_HAB_ENABLED_BIT;
 }
 
 static inline uint8_t get_idx(uint8_t *list, uint8_t tgt)
@@ -421,7 +423,7 @@ uint32_t authenticate_image(uint32_t ddr_start, uint32_t image_size)
                         * crash.
                         */
                        /* Check MMU enabled */
-                       if (get_cr() & CR_M) {
+                       if (is_soc_type(MXC_SOC_MX6) && get_cr() & CR_M) {
                                if (is_cpu_type(MXC_CPU_MX6Q) ||
                                    is_cpu_type(MXC_CPU_MX6D)) {
                                        /*