arm: mach-k3: am62a7_init: Open up FSS_DAT_REG3 firewall

On security enforced (HS-SE) devices ROM firewalls OSPI data region3 that
is present in above 64bit region. Open this up in bootloader to allow
Linux to access OSPI flashes in mmap mode.

Without this kernel will crash when accessing this region due to
firewall violations on HS-SE devices.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

diff --git a/arch/arm/mach-k3/am62a7_init.c b/arch/arm/mach-k3/am62a7_init.c
index 1f51b0408969605b30ec6cbeb6045c5b501f1199..8ac834cffdf9f1937752385f2228429a03248c8e 100644 (file)
--- a/arch/arm/mach-k3/am62a7_init.c
+++ b/arch/arm/mach-k3/am62a7_init.c
@@ -14,6 +14,10 @@
 #include <dm/uclass-internal.h>
 #include <dm/pinctrl.h>
 
+struct fwl_data cbass_main_fwls[] = {
+       { "FSS_DAT_REG3", 7, 8 },
+};
+
 /*
  * This uninitialized global variable would normal end up in the .bss section,
  * but the .bss is cleared between writing and reading this variable, so move
@@ -166,6 +170,9 @@ void board_init_f(ulong dummy)
        /* Output System Firmware version info */
        k3_sysfw_print_ver();
 
+       /* Disable ROM configured firewalls right after loading sysfw */
+       remove_fwl_configs(cbass_main_fwls, ARRAY_SIZE(cbass_main_fwls));
+
 #if defined(CONFIG_K3_AM62A_DDRSS)
        ret = uclass_get_device(UCLASS_RAM, 0, &dev);
        if (ret)